/* Modern Morse Master Styles */
:root {
    /* Light theme colors */
    --bg-primary: #f5f7fa;
    --bg-secondary: #e8eef5;
    --bg-tertiary: #dce4ec;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --accent-orange: #f97316;
    --accent-orange-light: #fb923c;
    --accent-orange-dark: #ea580c;
    --border-color: #bcc8d6;
    --shadow-light: rgba(0, 0, 0, 0.18);
    --shadow-medium: rgba(0, 0, 0, 0.28);
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
}

[data-theme="dark"] {
    /* Dark theme colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

.app {
    min-height: 100vh;
    position: relative;
}

/* Page transitions */
.page {
    display: none;
    min-height: 100vh;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.page.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.hidden {
    display: none !important;
}

/* Welcome Page Styles */
.welcome-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.welcome-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, var(--accent-orange)10 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, var(--accent-orange)08 0%, transparent 50%);
    pointer-events: none;
}

.logo-section {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.morse-lines {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.line {
    background: var(--accent-orange);
    border-radius: 2px;
    animation: morseGlow 2s ease-in-out infinite alternate;
}

.line.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation-delay: 0s;
}

.line.dash {
    width: 24px;
    height: 8px;
    animation-delay: 0.3s;
}

@keyframes morseGlow {
    0% { opacity: 0.6; box-shadow: 0 0 10px var(--accent-orange)40; }
    100% { opacity: 1; box-shadow: 0 0 20px var(--accent-orange)60; }
}

.logo h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 2px 10px var(--shadow-light);
    animation: titleFloat 3s ease-in-out infinite;
}

.logo h1 .letter {
    display: inline-block;
    opacity: 0.6;
    transition: all 0.3s ease;
}

.logo h1 .letter.blinking {
    opacity: 1;
    color: var(--accent-orange);
    text-shadow: 0 0 20px var(--accent-orange), 0 2px 10px var(--shadow-light);
    animation: morseLetterBlink 0.6s ease-in-out;
}

@keyframes morseLetterBlink {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes titleFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 500;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.5s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-content {
    max-width: 600px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.intro-text {
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.8s forwards;
}

.intro-text p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.1s forwards;
}

/* Button Styles */
.btn-primary {
    position: relative;
    background: var(--accent-orange);
    color: white;
    border: 2px solid transparent;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--accent-orange)40;
}

@media (hover: hover) {
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px var(--accent-orange)50;
        background: var(--accent-orange-light);
    }
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

@media (hover: hover) {
    .btn-primary:hover .btn-glow {
        left: 100%;
    }
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .btn-secondary:hover {
        border-color: var(--accent-orange);
        color: var(--accent-orange);
        transform: translateY(-2px);
        box-shadow: 0 4px 20px var(--shadow-light);
    }
}

/* Page Container Styles */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 3rem;
    padding: 1rem 2rem;
    border-bottom: 2px solid var(--border-color);
}

.page-back-btn {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1000;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 8px var(--shadow-light);
    overflow: hidden;
}


.back-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 8px var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.page-back-btn::before,
.back-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(249, 115, 22, 0.1), transparent);
    transition: left 0.6s;
}

@media (hover: hover) and (pointer: fine) {
    .page-back-btn:hover,
    .back-btn:hover {
        background: var(--accent-orange);
        border-color: var(--accent-orange);
        color: white;
        transform: translateX(-5px) scale(1.05);
        box-shadow: 0 8px 25px var(--accent-orange)40;
    }

    .page-back-btn:hover::before,
    .back-btn:hover::before {
        left: 100%;
    }
}

.page-back-btn:active,
.back-btn:active {
    transform: translateX(-3px) scale(1.02);
    transition: all 0.1s ease;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Settings Page */
.settings-content {
    display: grid;
    gap: 2rem;
    max-width: 500px;
    margin: 0 auto;
}

.setting-group {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .setting-group:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px var(--shadow-light);
    }
}

.setting-group label {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.setting-group label:not(:first-child) {
    margin-top: 2rem;
}

.setting-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.setting-control input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.setting-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-orange);
    cursor: pointer;
    box-shadow: 0 2px 10px var(--accent-orange)40;
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .setting-control input[type="range"]::-webkit-slider-thumb:hover {
        transform: scale(1.2);
    }
}

.setting-control span {
    font-weight: 600;
    color: var(--accent-orange);
    min-width: 3rem;
    text-align: center;
}

.theme-selector {
    display: flex;
    gap: 0.5rem;
}

.theme-btn {
    flex: 1;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-btn.active {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

@media (hover: hover) {
    .theme-btn:hover:not(.active) {
        background: var(--bg-primary);
        border-color: var(--accent-orange);
    }
}

.test-audio-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
    position: relative;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.test-audio-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.6s;
}

@media (hover: hover) {
    .test-audio-btn:hover {
        background: linear-gradient(135deg, #10b981 0%, var(--success) 100%);
        transform: translateY(-2px) scale(1.02);
        box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
    }

    .test-audio-btn:hover::before {
        left: 100%;
    }
}

.test-audio-btn:active {
    transform: translateY(0) scale(1);
    transition: all 0.1s ease;
}

.test-audio-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.test-info {
    text-align: center;
}

.test-info small {
    color: var(--text-muted);
    font-style: italic;
}

.version-footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem 0;
}

.version-footer span {
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.6;
    font-weight: 400;
}

/* Bluetooth Keep-Alive Toggle */
.bt-setting {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.bt-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 0;
}

.bt-toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
    cursor: pointer;
}

.bt-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.bt-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    transition: 0.3s;
    border-radius: 24px;
}

.bt-toggle-slider::before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-muted);
    transition: 0.3s;
    border-radius: 50%;
}

.bt-toggle-switch input:checked + .bt-toggle-slider {
    background-color: var(--accent-orange);
    border-color: var(--accent-orange);
}

.bt-toggle-switch input:checked + .bt-toggle-slider::before {
    transform: translateX(20px);
    background-color: white;
}

.bt-help-wrap {
    position: relative;
}

.bt-help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1px solid var(--text-muted);
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.bt-help-icon:hover {
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}

.bt-tooltip {
    display: none;
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    width: 220px;
    padding: 0.5rem 0.7rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--text-muted);
    z-index: 10;
}

.bt-tooltip::before {
    content: "";
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-right-color: var(--border-color);
}

.bt-tooltip::after {
    content: "";
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: var(--bg-tertiary);
}

.bt-tooltip.visible {
    display: block;
}

@media (max-width: 768px) {
    .bt-tooltip {
        left: auto;
        right: 0;
        top: calc(100% + 10px);
        transform: none;
        width: min(220px, calc(100vw - 2rem));
    }

    .bt-tooltip::before,
    .bt-tooltip::after {
        display: none;
    }
}

/* Mode Selection Page */
.training-sections {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

.training-section {
    padding-bottom: 0;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: -0.7rem;
    margin-bottom: 1rem;
}

.mode-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.mode-row {
    display: grid;
    grid-template-columns: 2.5rem 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0.25rem;
    background: transparent;
    border: none;
    border-top: 1px solid var(--border-color);
    border-radius: 0;
    cursor: pointer;
    transition: background-color 0.2s ease, padding 0.2s ease;
    text-align: left;
}

.mode-row:first-child {
    border-top: none;
}

@media (hover: hover) {
    .mode-row:hover {
        background: var(--bg-secondary);
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .mode-row:hover .mode-chevron {
        transform: translateX(3px);
        color: var(--accent-orange);
    }

    .mode-row:hover .mode-glyph {
        color: var(--accent-orange);
    }
}

.mode-row .mode-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    margin: 0;
    opacity: 1;
    font-size: inherit;
}

.mode-row .mode-glyph {
    width: 1.75rem;
    height: 1.75rem;
    display: block;
    color: inherit;
}

.mode-row .mode-emoji {
    display: none;
    font-size: 1.75rem;
    line-height: 1;
}

/* Fallback toggle: add class "use-emoji" on .mode-list to restore emojis */
.mode-list.use-emoji .mode-glyph {
    display: none;
}

.mode-list.use-emoji .mode-emoji {
    display: inline-block;
}

.mode-row .mode-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.mode-row h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

.mode-row p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.3;
    margin: 0;
}

.mode-chevron {
    font-size: 1.5rem;
    color: var(--text-muted);
    line-height: 1;
    padding-right: 0.25rem;
    transition: transform 0.2s ease, color 0.2s ease;
}

/* Disabled mode row */
.mode-row.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    position: relative;
}

.mode-row.disabled:hover {
    background: transparent;
    padding-left: 0.25rem;
    padding-right: 0.25rem;
}

.coming-soon-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    transform: rotate(-15deg);
    background: var(--accent-orange);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Game Page Styles */
.game-layout {
    display: flex;
    min-height: 100vh;
}

.level-sidebar {
    width: 250px;
    background: var(--bg-secondary);
    border-right: 2px solid var(--border-color);
    padding: 4rem 1rem 1rem 1rem;
    flex-shrink: 0;
}

.sidebar-header {
    margin-bottom: 0;
}

/* Hidden radios — source of truth for mode state; visible UI is .mode-tabs in the game header. */
.mode-radios-hidden {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

/* ===== Mode Tabs (segmented control in game header) ===== */
.mode-tabs {
    position: relative;
    display: inline-flex;
    align-items: stretch;
    gap: 0;
    padding: 4px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    box-shadow: inset 0 1px 2px var(--shadow-light);
    isolation: isolate;
}

.mode-tabs-indicator {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-orange-light) 100%);
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35), 0 1px 2px rgba(0, 0, 0, 0.08);
    transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 0;
    will-change: transform;
}

.mode-tabs[data-mode="send"] .mode-tabs-indicator {
    transform: translateX(100%);
}

.mode-tab {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex: 1 1 0;
    min-width: 6.5rem;
    padding: 0.55rem 1.1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.25s ease, transform 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.mode-tab-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.mode-tab.active {
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}

.mode-tab.active .mode-tab-icon {
    transform: scale(1.05);
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

@media (hover: hover) {
    .mode-tab:not(.active):hover {
        color: var(--text-primary);
    }
    .mode-tab:not(.active):hover .mode-tab-icon {
        transform: scale(1.08);
    }
}

.mode-tab:focus-visible {
    outline: 2px solid var(--accent-orange);
    outline-offset: 3px;
}

/* Hide tabs during active gameplay (only visible on welcome/level-intro). */
.mode-tabs.hidden {
    display: none;
}

@media (max-width: 768px) {
    .mode-tabs {
        height: 44px;
        padding: 4px;
        box-shadow: 0 2px 10px var(--shadow-light), inset 0 1px 2px var(--shadow-light);
        background: var(--bg-secondary);
    }
    .mode-tabs-indicator {
        top: 4px;
        bottom: 4px;
    }
    .mode-tab {
        flex: 1 1 0;
        min-width: 4.5rem;
        padding: 0 0.75rem;
        font-size: 0.8rem;
        gap: 0.35rem;
    }
    .mode-tab-icon {
        width: 14px;
        height: 14px;
    }
}

.level-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.level-menu-item {
    background: var(--bg-primary);
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

@media (hover: hover) {
    .level-menu-item:hover {
        border-color: var(--accent-orange);
        background: var(--accent-orange)08;
    }
}

.level-menu-item.active {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

.level-menu-item.completed {
    border-color: var(--success);
}

@media (hover: hover) {
    .level-menu-item.completed:hover {
        border-color: var(--accent-orange);
    }
}

.level-menu-item.completed .level-label {
    color: var(--success);
}

.level-menu-item.completed .level-chars-preview {
    color: var(--success);
    opacity: 0.7;
}

.level-menu-item.active.completed {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
    color: white;
}

.level-menu-item.active.completed .level-label {
    color: white;
}

.level-menu-item.active.completed .level-chars-preview {
    color: rgba(255, 255, 255, 0.8);
}

.game-container {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    overflow-x: hidden;
}

.game-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.game-info {
    grid-column: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.game-header .header-right {
    grid-column: 3;
    justify-self: end;
}

.mode-indicator {
    background: var(--accent-orange);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

.current-level {
    display: none;
}

/* Global Settings Button */
.settings-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-secondary);
}

@media (hover: hover) {
    .settings-btn:hover {
        background: var(--accent-orange);
        border-color: var(--accent-orange);
        color: white;
        transform: rotate(90deg) scale(1.1);
        box-shadow: 0 4px 15px var(--accent-orange)30;
    }
}

.settings-btn svg {
    width: 20px;
    height: 20px;
}

.level-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.level-selector label {
    font-weight: 600;
    color: var(--text-secondary);
}

.level-selector select {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.level-selector select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

/* Characters Welcome */
.characters-welcome {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 4rem);
    padding: 2rem;
    margin-top: -14vh;
}

.characters-welcome-card {
    max-width: 560px;
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 8px 32px var(--shadow-light), 0 2px 8px var(--shadow-light);
    animation: welcomeCardEnter 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    position: relative;
    overflow: hidden;
}

.characters-welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-orange-light), var(--accent-orange));
    border-radius: 16px 16px 0 0;
}

.characters-welcome-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--accent-orange);
    display: inline-block;
    animation: welcomeItemFadeIn 0.4s ease-out 0.1s both;
}

.characters-welcome-card p {
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    animation: welcomeItemFadeIn 0.4s ease-out both;
}

.characters-welcome-card p:nth-of-type(1) { animation-delay: 0.15s; }
.characters-welcome-card p:nth-of-type(2) { animation-delay: 0.22s; }
.characters-welcome-card p:nth-of-type(3) { animation-delay: 0.29s; }

.characters-welcome-card p strong {
    color: var(--accent-orange);
    font-weight: 600;
}

.characters-welcome-hint {
    color: var(--text-muted) !important;
    font-size: 0.85rem !important;
    margin-bottom: 0 !important;
    margin-top: 0.5rem !important;
    animation-delay: 0.36s !important;
}

.characters-welcome-start-btn {
    display: none;
    margin-top: 1.2rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-orange);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    animation: welcomeItemFadeIn 0.4s ease-out 0.4s both;
    width: 100%;
}

.characters-welcome-start-btn:hover {
    background: var(--accent-orange-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-orange)40;
}

@keyframes welcomeCardEnter {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes welcomeItemFadeIn {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Level Introduction */
.level-intro {
    text-align: center;
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.level-intro.animate-in {
    animation: levelIntroEnter 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.level-intro.animate-in h2 {
    opacity: 0;
    animation: levelItemFadeIn 0.4s ease-out 0.1s forwards;
}

.level-intro.animate-in .letter-showcase {
    opacity: 0;
    animation: levelItemFadeIn 0.4s ease-out 0.2s forwards;
}

.level-intro.animate-in .practice-summary {
    opacity: 0;
    animation: levelItemFadeIn 0.4s ease-out 0.2s forwards;
}

.level-intro.animate-in #levelIntroButtons {
    opacity: 0;
    animation: levelItemFadeIn 0.4s ease-out 0.3s forwards;
}

/* Layout for the level intro action buttons.
   Primary actions (Start/Resume/Restart) sit on one row; Game Settings sits
   on its own row below, visually separated. */
.level-intro-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.level-intro-primary-actions {
    display: flex;
    justify-content: center;
    align-items: stretch;
    flex-wrap: wrap;
    gap: 1rem;
}

.level-intro-secondary-actions {
    display: flex;
    justify-content: center;
}

.level-intro-buttons .btn-primary,
.level-intro-buttons .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0;
}

/* On mobile, keep the primary actions tight together and let Game Settings
   sit a little further below. */
@media (max-width: 768px) {
    .level-intro-primary-actions {
        flex-direction: column;
        gap: 0.6rem;
        width: 100%;
        align-items: center;
    }

    .level-intro-secondary-actions {
        margin-top: 0.4rem;
    }
}

/* Prev/Next level nav on intro page — mobile only (see @media block) */
.level-intro-nav {
    display: none;
}

.level-intro-nav.visible {
    /* shown via JS only when on a Characters level intro page */
}


@keyframes levelIntroEnter {
    0% {
        opacity: 0;
        transform: translateY(12px) scale(0.99);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes levelItemFadeIn {
    0% {
        opacity: 0;
        transform: translateY(8px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Level intro exit animation */
.level-intro.animate-out {
    animation: levelIntroExit 0.2s ease-in forwards;
}

@keyframes levelIntroExit {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.98);
    }
}

/* Game area enter animation */
.game-area.animate-in {
    animation: gameAreaEnterChars 0.3s ease-out 0.1s both;
}

@keyframes gameAreaEnterChars {
    0% {
        opacity: 0;
        transform: translateY(12px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.level-intro h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.letter-showcase {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.letter-card {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.25rem 0.9rem;
    text-align: center;
    width: 160px;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.9rem;
}

.letter-card .letter {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
}

.letter-card .morse {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 0.75rem;
}

.letter-card .morse-dot,
.letter-card .morse-dash {
    display: inline-block;
    background: var(--accent-orange);
    border-radius: 999px;
    height: 0.6rem;
}

.letter-card .morse-dot {
    width: 0.6rem;
}

.letter-card .morse-dash {
    width: 1.6rem;
}

.play-btn:not(.modern-play-btn) {
    background: var(--success);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .play-btn:not(.modern-play-btn):hover {
        background: #059669;
        transform: scale(1.05);
    }
}

/* Clean play button styles */
.modern-play-btn {
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-orange-light) 100%);
    border: none;
    border-radius: 50%;
    width: 54px;
    height: 54px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px var(--accent-orange)40;
    position: relative;
    overflow: hidden;
    padding: 0;
}

.modern-play-btn svg {
    width: 18px;
    height: 18px;
    color: white;
    transition: all 0.3s ease;
}

@media (hover: hover) and (pointer: fine) {
    .modern-play-btn:hover {
        transform: translateY(-2px) scale(1.05);
        box-shadow: 0 12px 30px var(--accent-orange)50;
    }
}

.modern-play-btn:active,
.modern-play-btn.tapped {
    transform: scale(0.92);
    box-shadow: 0 4px 12px var(--accent-orange)40;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.modern-play-btn:focus {
    outline: none;
}

.modern-play-btn:focus:not(:focus-visible) {
    transform: none;
    box-shadow: 0 8px 25px var(--accent-orange)40;
}

/* Game Area */
.game-area {
    display: grid;
    gap: 2rem;
}

.game-mode {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.game-display {
    text-align: center;
    margin-bottom: 2rem;
}

.morse-display {
    font-size: 3rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-orange);
    margin-bottom: 1rem;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 4px;
}

.audio-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.audio-btn:not(.modern-audio-btn) {
    background: var(--accent-orange);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .audio-btn:not(.modern-audio-btn):hover {
        background: var(--accent-orange-light);
        transform: translateY(-2px);
    }
}

/* Clean modern audio buttons */
.modern-audio-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-orange-light) 100%);
    border: none;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-orange)30;
    position: relative;
    overflow: hidden;
}

/* Specific styling for replay buttons */
.audio-btn.modern-play-btn {
    padding: 0;
    gap: 0;
    width: 54px;
    height: 54px;
    border-radius: 50%;
}

.modern-audio-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

@media (hover: hover) {
    .modern-audio-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px var(--accent-orange)40;
    }
}

.modern-audio-btn:active {
    transform: translateY(0);
    transition: all 0.1s ease;
}

.game-result {
    font-size: 1.25rem;
    font-weight: 600;
    min-height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: 12px;
    max-width: 300px;
    margin: 0 auto;
}

/* Fade the result out just before the next character plays */
.game-result.fade-out {
    opacity: 0;
    transition: opacity 0.35s ease-out;
}

.game-result.correct {
    color: var(--success);
    animation: successPulse 0.5s ease-out;
}

.game-result.correct-state {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border-color: var(--success);
    animation: receiveCorrectPulse 0.5s ease-out;
}

.receive-correct-message {
    color: var(--success);
    font-weight: 600;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
    text-align: center;
}

@keyframes receiveCorrectPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.1);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.game-result.incorrect {
    color: var(--error);
    animation: errorShake 0.5s ease-out;
}

.game-result.level-complete {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    padding: 1.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.3),
                0 0 40px rgba(16, 185, 129, 0.1);
    border: none;
    max-width: none;
    position: relative;
    overflow: hidden;
    animation: levelCompleteAppear 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    margin: 1rem 0;
    text-align: center;
    transform: translateY(0);
    backdrop-filter: blur(10px);
    letter-spacing: 0.5px;
}

.game-result.level-complete::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.8s ease;
}

@media (hover: hover) {
    .game-result.level-complete:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 40px rgba(16, 185, 129, 0.4);
    }

    .game-result.level-complete:hover::before {
        left: 100%;
    }
}

@keyframes levelCompleteAppear {
    0% { 
        transform: scale(0.6) translateY(40px) rotateY(-15deg);
        opacity: 0;
        filter: blur(10px);
    }
    30% {
        transform: scale(0.9) translateY(10px) rotateY(-5deg);
        opacity: 0.7;
        filter: blur(3px);
    }
    60% { 
        transform: scale(1.1) translateY(-10px) rotateY(2deg);
        opacity: 0.95;
        filter: blur(0px);
    }
    80% {
        transform: scale(0.98) translateY(2px) rotateY(-1deg);
        opacity: 1;
    }
    100% { 
        transform: scale(1) translateY(0) rotateY(0deg);
        opacity: 1;
        filter: blur(0px);
    }
}

@keyframes slideUpButtons {
    0% {
        transform: translateY(60px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes successPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.1);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Listening Indicator */
.listening-indicator {
    text-align: center;
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.sound-icon {
    font-size: 3rem;
    opacity: 0.3;
    transition: all 0.3s ease;
}

.sound-icon.playing {
    opacity: 1;
    animation: soundPulse 0.6s ease-in-out infinite alternate;
    color: var(--accent-orange);
}

@keyframes soundPulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.2); }
}

.sound-waves {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    height: 40px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sound-waves.active {
    opacity: 1;
}

.wave {
    width: 4px;
    background: var(--accent-orange);
    border-radius: 2px;
    animation: soundWave 1.2s ease-in-out infinite;
}

.wave:nth-child(1) { animation-delay: 0s; }
.wave:nth-child(2) { animation-delay: 0.2s; }
.wave:nth-child(3) { animation-delay: 0.4s; }

@keyframes soundWave {
    0%, 100% {
        height: 8px;
        opacity: 0.5;
    }
    50% {
        height: 32px;
        opacity: 1;
    }
}

/* Keyboard Styles */
.keyboard-container {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 3rem 2rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px var(--shadow-light);
}

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

.key {
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border: 3px solid var(--border-color);
    border-radius: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    font-variant-numeric: slashed-zero;
    color: var(--text-muted);
    cursor: not-allowed;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-light);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.key.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--success);
    cursor: pointer;
    box-shadow: 0 4px 15px var(--shadow-medium);
}

@media (hover: hover) {
    .key.active:hover {
        background: var(--bg-secondary);
        color: var(--text-primary);
    }
}

.key.active:active {
    transform: scale(0.95);
}

/* Progress visualization - solid color filling from bottom */
.key.active.progress-10 {
    background: linear-gradient(to top, #10b981 10%, var(--bg-primary) 10%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-20 {
    background: linear-gradient(to top, #10b981 20%, var(--bg-primary) 20%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-30 {
    background: linear-gradient(to top, #10b981 30%, var(--bg-primary) 30%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-40 {
    background: linear-gradient(to top, #10b981 40%, var(--bg-primary) 40%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-50 {
    background: linear-gradient(to top, #10b981 50%, var(--bg-primary) 50%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-60 {
    background: linear-gradient(to top, #10b981 60%, var(--bg-primary) 60%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-70 {
    background: linear-gradient(to top, #10b981 70%, var(--bg-primary) 70%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-80 {
    background: linear-gradient(to top, #10b981 80%, var(--bg-primary) 80%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-90 {
    background: linear-gradient(to top, #10b981 90%, var(--bg-primary) 90%) !important;
    border-color: #10b981 !important;
}

.key.active.progress-100 {
    background: #10b981 !important;
    border-color: #10b981 !important;
    color: white !important;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

@media (hover: hover) {
    .key.active.progress-100:hover {
        background: #10b981 !important;
        color: white !important;
    }
}

/* Send Mode Styles */
.send-display {
    text-align: center;
}

.target-letter h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: 'JetBrains Mono', monospace;
    font-variant-numeric: slashed-zero;
}

.perfect-message {
    font-size: 2rem;
    color: var(--success);
    font-weight: 600;
    animation: perfectAppear 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

@keyframes perfectAppear {
    0% {
        opacity: 0;
        transform: translateY(-15px) scale(0.9);
    }
    60% {
        opacity: 1;
        transform: translateY(0) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.target-morse {
    font-size: 2.5rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 2rem;
    letter-spacing: 4px;
    opacity: 0.5;
    font-style: italic;
}

.input-area {
    margin: 2rem 0;
}

.morse-input {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    font-size: 2rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-orange);
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
    letter-spacing: 3px;
    box-sizing: border-box;
}

.morse-input:not(:empty),
.morse-input.inputting {
    border-color: var(--accent-orange);
}

.morse-input.inputting {
    transform: none;
    box-shadow: none;
}

.morse-input.error-state {
    border-color: var(--error);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    animation: errorPulse 0.6s ease-out;
}

.morse-input.success-state,
.morse-input.success-state:not(:empty) {
    border-color: var(--success);
    color: var(--success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    animation: receiveCorrectPulse 0.6s ease-out;
}

/* Fade the green success state out gently instead of snapping back to orange */
.morse-input.success-state.fade-out,
.morse-input.success-state.fade-out:not(:empty) {
    transition: border-color 0.4s ease-out, color 0.4s ease-out, background 0.4s ease-out;
    border-color: var(--border-color);
    color: var(--accent-orange);
    background: var(--bg-tertiary);
    animation: none;
}

.error-message {
    color: var(--error);
    font-weight: 600;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
    position: relative;
    z-index: 1;
}

.error-message::before {
    display: none;
}

@keyframes errorPulse {
    0% { 
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% { 
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.1);
    }
    100% { 
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* Receive mode error styling */
.game-result.error-state {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border-color: var(--error);
    animation: receiveErrorPulse 0.5s ease-out;
}

.receive-error-message {
    color: var(--error);
    font-weight: 600;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
    text-align: center;
}

.receive-error-message::before {
    display: none;
}

.receive-error-message strong {
    color: var(--error);
    font-weight: 700;
    text-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

@keyframes receiveErrorPulse {
    0% { 
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% { 
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.1);
    }
    100% { 
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* Send input area (below keyboard) */
.send-input-area {
    padding: 0.5rem 1.5rem 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

/* Method switch (freehand / manual) */
.send-method-switch {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.send-method-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    transition: color 0.25s ease;
}

.send-method-label.active {
    color: var(--text-primary);
}

.freehand-hint {
    font-weight: 400;
    font-size: 0.7rem;
    opacity: 0.7;
}

.send-toggle {
    position: relative;
    cursor: pointer;
    display: inline-block;
}

.send-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.send-toggle-track {
    display: block;
    width: 44px;
    height: 24px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
    transition: all 0.3s ease;
}

.send-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--accent-orange);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 4px rgba(249, 115, 22, 0.3);
}

.send-toggle input:checked ~ .send-toggle-track .send-toggle-thumb {
    left: 22px;
}

.send-toggle input:checked ~ .send-toggle-track {
    border-color: var(--accent-orange);
}

/* Send touch area (freehand input — mobile only) */
.send-touch-area {
    width: 100%;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    display: none;
    justify-content: center;
    align-items: center;
    min-height: 150px;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    cursor: pointer;
    transition: all 0.15s ease;
}

.send-touch-area:active,
.send-touch-area.active {
    background: var(--accent-orange)15;
}

.send-touch-area.active .send-touch-inner {
    transform: scale(0.98);
    border-color: var(--accent-orange);
    box-shadow: 0 0 30px var(--accent-orange)50;
}

.send-touch-inner {
    width: 100%;
    max-width: 400px;
    height: 100%;
    min-height: 100px;
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.send-touch-hint {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Manual controls */
.manual-controls {
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.manual-controls-row {
    display: flex;
    gap: 0.5rem;
}

.manual-controls .morse-btn {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.morse-btn-symbol {
    font-size: 1.4rem;
    font-family: 'JetBrains Mono', monospace;
    line-height: 1;
    color: var(--accent-orange);
}

.morse-btn-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.morse-btn-dot:active {
    border-color: var(--accent-orange);
    background: rgba(249, 115, 22, 0.08);
    transform: scale(0.97);
}

.morse-btn-dash:active {
    border-color: var(--accent-orange);
    background: rgba(249, 115, 22, 0.08);
    transform: scale(0.97);
}

@media (hover: hover) {
    .manual-controls .morse-btn:hover {
        border-color: var(--accent-orange);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(249, 115, 22, 0.15);
    }
}

.manual-actions {
    display: flex;
    gap: 0.5rem;
}

.manual-action-btn {
    flex: 1;
    padding: 0.5rem;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.manual-action-btn.clear-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.manual-action-btn.submit-btn {
    background: var(--success);
    color: white;
    border: none;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

@media (hover: hover) {
    .manual-action-btn.clear-btn:hover {
        background: var(--error);
        color: white;
        border-color: var(--error);
    }

    .manual-action-btn.submit-btn:hover {
        background: #059669;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    }
}

.game-controls {
    text-align: center;
    margin-top: 2rem;
}

.level-complete-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    animation: slideUpButtons 0.8s ease-out 0.3s both;
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1002;
    background: var(--accent-orange);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px var(--accent-orange)40;
}

@media (hover: hover) {
    .mobile-menu-toggle:hover {
        background: var(--accent-orange-light);
        transform: translateY(-2px);
        box-shadow: 0 4px 15px var(--accent-orange)50;
    }
}

/* Mobile Menu Close Button */
.mobile-menu-close {
    display: none;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 8px var(--shadow-light);
    overflow: hidden;
}

.mobile-menu-close::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(249, 115, 22, 0.1), transparent);
    transition: left 0.6s;
}

@media (hover: hover) {
    .mobile-menu-close:hover {
        background: var(--accent-orange);
        border-color: var(--accent-orange);
        color: white;
        transform: translateX(5px) scale(1.05);
        box-shadow: 0 8px 25px var(--accent-orange)40;
    }

    .mobile-menu-close:hover::before {
        left: 100%;
    }
}

.mobile-menu-close:active {
    transform: translateX(3px) scale(1.02);
    transition: all 0.1s ease;
}

.mobile-menu-toggle.active {
    background: var(--accent-orange-dark);
}

.mobile-menu-toggle.back-mode {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 8px var(--shadow-light);
}

@media (hover: hover) {
    .mobile-menu-toggle.back-mode:hover {
        background: var(--bg-secondary);
        color: var(--text-secondary);
        transform: none;
        box-shadow: 0 2px 8px var(--shadow-light);
    }
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    z-index: 1001;
}

/* Responsive Design */
@media (max-width: 768px) {
    .welcome-container {
        padding: 1rem;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .logo h1 {
        font-size: 2.2rem;
        white-space: nowrap;
        padding: 0.5rem 0;
    }
    
    .logo {
        padding: 0 1rem;
    }
    
    .intro-text p {
        font-size: 1rem;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    .page-header {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        margin-top: 1rem;
        position: relative;
    }
    
    .page-header h1 {
        font-size: 2rem;
        text-align: center;
    }
    
    #settingsPage .page-back-btn,
    #modeSelectionPage .page-back-btn {
        position: fixed;
        top: 1rem;
        left: 1rem;
        transform: none;
        margin: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .game-layout {
        flex-direction: column;
    }
    
    .level-sidebar {
        position: fixed;
        top: 0;
        left: -300px;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        border-right: 2px solid var(--border-color);
        border-bottom: none;
        padding: 6rem 1rem 1rem 1rem;
        z-index: 1000;
        transition: left 0.3s ease;
        overflow-y: auto;
    }
    
    .mobile-menu-overlay {
        z-index: 999;
    }
    
    .level-sidebar.open {
        left: 0;
        z-index: 1001;
    }
    
    .mobile-menu-toggle.active {
        background: var(--bg-secondary);
        border: 2px solid var(--border-color);
        color: var(--text-secondary);
        box-shadow: 0 2px 8px var(--shadow-light);
        z-index: 998;
    }
    
    .level-menu {
        flex-direction: column;
        overflow-x: visible;
        padding-bottom: 0.5rem;
    }
    
    .level-menu-item {
        min-width: auto;
        text-align: left;
    }
    
    .game-header {
        display: block;
        text-align: center;
        margin-top: 4.5rem;
        padding-top: 1rem;
        padding-bottom: 1rem;
        margin-bottom: 2rem;
    }

    .game-info {
        display: block;
        width: 100%;
        gap: 0;
        min-height: 0;
    }

    .current-level {
        display: none;
    }

    /* On mobile, the tabs float fixed at the top, centered between
       the menu button (left) and settings (right) — same top row. */
    .mode-tabs {
        position: fixed;
        top: 1rem;
        left: 50%;
        transform: translateX(-50%);
        z-index: 999;
    }

    .mode-tabs[data-mode="send"] .mode-tabs-indicator {
        transform: translateX(100%);
    }

    .game-header .header-right {
        position: fixed;
        top: 1rem;
        right: 1rem;
        z-index: 999;
    }

    .game-header .header-right .settings-btn {
        position: static;
    }
    
    .level-sidebar .page-back-btn {
        position: absolute;
        top: 1rem;
        left: 1rem;
        display: block;
    }

    .level-sidebar .mobile-menu-close {
        display: flex;
    }

    .keyboard-container {
        padding: 1.5rem 1rem;
        margin: 0 -0.5rem;
    }
    
    .keyboard {
        max-width: 100%;
    }
    
    .keyboard-row {
        gap: 0.3rem;
        justify-content: center;
    }
    
    .key {
        width: calc((100vw - 4rem) / 11);
        max-width: 45px;
        height: 45px;
        font-size: 0.9rem;
        padding: 0;
        min-width: 30px;
    }
    
    .game-container {
        padding: 0.5rem;
    }
    
    .characters-welcome {
        padding: 1rem;
        min-height: calc(100vh - 3rem);
        margin-top: -20vh;
    }

    .characters-welcome-card {
        padding: 1.5rem;
    }

    .characters-welcome-card h2 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .characters-welcome-card p {
        font-size: 0.9rem;
    }

    .characters-welcome-start-btn {
        display: block;
    }

    .characters-welcome-hint {
        display: none !important;
    }

    .level-intro {
        padding: 1.5rem 1rem;
        margin-bottom: 1rem;
        border-radius: 16px;
    }

    .level-intro h2 {
        font-size: 1.75rem;
        margin-bottom: 1.5rem;
    }

    .level-intro-nav.visible {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 0.75rem;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom));
        background: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        z-index: 50;
    }

    .level-intro-nav-btn {
        flex: 1;
        padding: 0.75rem 1rem;
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        color: var(--text-primary);
        font-size: 0.95rem;
        font-weight: 500;
        cursor: pointer;
        transition: background 0.15s ease, border-color 0.15s ease;
        -webkit-tap-highlight-color: transparent;
    }

    .level-intro-nav-btn:active {
        background: var(--bg-primary);
        border-color: var(--text-primary);
    }

    /* When only one of prev/next exists, don't stretch it across the full row */
    .level-intro-nav:has(> :only-child) {
        justify-content: flex-start;
    }
    .level-intro-nav:has(> :only-child.level-intro-nav-next) {
        justify-content: flex-end;
    }
    .level-intro-nav > :only-child {
        flex: 0 1 auto;
        min-width: 45%;
    }

    /* Hide the level-intro nav while the sidebar menu is open */
    body:has(.level-sidebar.open) .level-intro-nav.visible {
        display: none;
    }
    
    .game-mode {
        padding: 1.5rem 1rem;
    }
    
    .morse-input {
        height: 60px;
        font-size: 1.5rem;
        padding: 1rem;
    }
    
    .target-letter h2 {
        font-size: 1.5rem;
    }
    
    .target-morse {
        font-size: 2rem;
    }
    
    .audio-controls {
        margin-bottom: 0.5rem;
    }
    
    #modeSelectionPage .page-header {
        margin-bottom: 1.5rem;
        padding: 0.75rem 1rem;
    }

    #modeSelectionPage .page-container {
        padding: 1.5rem 1rem;
    }

    .training-sections {
        gap: 1.25rem;
    }

    .section-title {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .section-subtitle {
        margin-bottom: 0.75rem;
    }

    .mode-row {
        grid-template-columns: 2.25rem 1fr auto;
        gap: 0.85rem;
        padding: 0.9rem 0.25rem;
    }

    .mode-row .mode-icon {
        width: 2.25rem;
        height: 2.25rem;
    }

    .mode-row .mode-glyph {
        width: 1.5rem;
        height: 1.5rem;
    }

    .mode-row .mode-emoji {
        font-size: 1.5rem;
    }

    .mode-row h3 {
        font-size: 1rem;
    }

    .mode-row p {
        font-size: 0.8rem;
    }

    .mode-chevron {
        font-size: 1.35rem;
    }
    
    .letter-showcase {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 0.75rem;
        margin-bottom: 2rem;
    }
    
    .letter-card {
        width: 130px;
        padding: 1rem 0.6rem;
        border-radius: 12px;
        flex: 0 0 auto;
        gap: 0.7rem;
    }

    .letter-card .letter {
        font-size: 2.3rem;
    }

    .letter-card .morse {
        gap: 0.25rem;
    }

    .letter-card .morse-dot,
    .letter-card .morse-dash {
        height: 0.5rem;
    }

    .letter-card .morse-dot {
        width: 0.5rem;
    }

    .letter-card .morse-dash {
        width: 1.15rem;
    }
    
    /* Mobile: reorder send input area below keyboard */
    .game-area {
        display: flex;
        flex-direction: column;
    }

    .send-input-area {
        order: 10;
        padding: 0.75rem 1rem 1.25rem;
        gap: 0.75rem;
    }

    .keyboard-container {
        order: 5;
    }

    .game-controls {
        order: 15;
    }

    /* Show touch area on mobile */
    .send-touch-area {
        display: flex;
    }

    /* Hide spacebar hint on mobile */
    .freehand-hint {
        display: none;
    }

    .manual-controls .morse-btn {
        padding: 1rem;
    }

    .morse-btn-symbol {
        font-size: 1.5rem;
    }
    
    .level-complete-controls {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        width: 100%;
        max-width: 250px;
    }
    
    .page-back-btn {
        top: 0.5rem;
        left: 0.5rem;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .mobile-menu-close {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    /* Game Settings modal: tighter padding so content never overflows on narrow screens */
    .game-settings-modal {
        padding: 1rem;
        padding: calc(1rem + env(safe-area-inset-top)) 1rem calc(1rem + env(safe-area-inset-bottom));
    }

    .game-settings-card {
        padding: 2rem 1.5rem;
    }

}

/* Extra small mobile screens (320px and below) */
@media (max-width: 320px) {
    .letter-card {
        width: 105px;
        padding: 0.85rem 0.5rem;
        border-radius: 10px;
        gap: 0.6rem;
    }

    .letter-card .letter {
        font-size: 2rem;
    }

    .letter-card .morse {
        gap: 0.2rem;
    }

    .letter-card .morse-dot,
    .letter-card .morse-dash {
        height: 0.4rem;
    }

    .letter-card .morse-dot {
        width: 0.4rem;
    }

    .letter-card .morse-dash {
        width: 0.95rem;
    }
    
    .mode-row {
        grid-template-columns: 2rem 1fr auto;
        gap: 0.7rem;
        padding: 0.75rem 0.25rem;
    }

    .mode-row .mode-icon {
        width: 2rem;
        height: 2rem;
    }

    .mode-row .mode-glyph {
        width: 1.35rem;
        height: 1.35rem;
    }

    .mode-row .mode-emoji {
        font-size: 1.25rem;
    }

    .mode-row h3 {
        font-size: 0.9rem;
    }

    .mode-row p {
        font-size: 0.75rem;
    }
}

/* ===========================================
   WORDS MODE STYLES
   Completely separate from Letters mode
   =========================================== */

/* Words Game Container */
.words-game-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* Words Top Bar */
.words-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.words-top-bar .page-back-btn {
    position: static;
}

.words-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

/* Words Pre-game Setup */
.words-pre-game-setup {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.words-setup-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 8px 32px var(--shadow-light), 0 2px 8px var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.words-setup-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-orange-light), var(--accent-orange));
    border-radius: 16px 16px 0 0;
}

/* Initial entrance animation - triggered by class */
.words-pre-game-setup.animate-in .words-setup-card {
    animation: setupCardEnter 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.words-pre-game-setup.animate-in .words-setup-card h2 {
    animation: setupItemFadeIn 0.4s ease-out 0.1s both;
}

.words-pre-game-setup.animate-in .words-setting-item {
    animation: setupItemFadeIn 0.4s ease-out both;
}

.words-pre-game-setup.animate-in .words-setting-item:nth-of-type(1) { animation-delay: 0.15s; }
.words-pre-game-setup.animate-in .words-setting-item:nth-of-type(2) { animation-delay: 0.22s; }
.words-pre-game-setup.animate-in .words-setting-item:nth-of-type(3) { animation-delay: 0.29s; }
.words-pre-game-setup.animate-in .words-setting-item:nth-of-type(4) { animation-delay: 0.36s; }
.words-pre-game-setup.animate-in .words-setting-item:nth-of-type(5) { animation-delay: 0.43s; }

.words-pre-game-setup.animate-in .words-start-btn {
    animation: setupItemFadeIn 0.4s ease-out 0.50s both;
}

@keyframes setupCardEnter {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.words-setup-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--accent-orange);
    display: inline-block;
}

.words-setting-item {
    margin-bottom: 1.5rem;
}

/* Characters Game Settings modal (level intro) */
.game-settings-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    padding: calc(1.5rem + env(safe-area-inset-top)) 1.5rem calc(1.5rem + env(safe-area-inset-bottom));
}

.game-settings-modal.hidden {
    display: none;
}

.game-settings-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    animation: gameSettingsFade 0.2s ease-out;
}

.game-settings-card {
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
    animation: setupCardEnter 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Keep slider row and hint text inside the card padding at any width */
.game-settings-card .words-setting-item {
    min-width: 0;
}

.game-settings-card .words-setting-control {
    min-width: 0;
}

.game-settings-close {
    position: absolute;
    top: 0.75rem;
    right: 0.9rem;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.15s ease, background 0.15s ease;
}

.game-settings-close:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary, rgba(128, 128, 128, 0.12));
}

.game-settings-hint {
    margin-top: 0.6rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.game-settings-done {
    width: 100%;
    max-width: none; /* override global mobile .btn-primary max-width so it fills the card */
    margin-top: 0.5rem;
}

/* Game Settings button icon on the level intro (matches Start/Resume/Restart family) */
.level-intro-settings-btn svg {
    width: 1.05em;
    height: 1.05em;
    fill: currentColor;
    flex-shrink: 0;
}

@keyframes gameSettingsFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes setupItemFadeIn {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.words-setting-item > label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

/* Content type checkbox group (Words / Callsigns) */
.words-content-type-group {
    display: flex;
    gap: 1rem;
}

.words-content-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    transition: all 0.2s ease;
    flex: 1;
    justify-content: center;
    user-select: none;
}

@media (hover: hover) {
    .words-content-checkbox:hover {
        border-color: var(--accent-orange-light);
    }
}

.words-content-checkbox input[type="checkbox"] {
    display: none;
}

.words-content-check {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    position: relative;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.words-content-checkbox input[type="checkbox"]:checked ~ .words-content-check {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
}

.words-content-checkbox input[type="checkbox"]:checked ~ .words-content-check::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.words-content-checkbox input[type="checkbox"]:checked ~ span:last-child {
    color: var(--accent-orange);
    font-weight: 600;
}

.words-content-checkbox span:last-child {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.words-length-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.words-length-header > label:first-child {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0;
}

.words-random-length-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    user-select: none;
}

.words-random-length-label input[type="checkbox"] {
    display: none;
}

.words-random-check {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    position: relative;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.words-random-length-label input[type="checkbox"]:checked ~ .words-random-check {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
}

.words-random-length-label input[type="checkbox"]:checked ~ .words-random-check::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.words-random-length-label input[type="checkbox"]:checked ~ span:last-child {
    color: var(--accent-orange);
    font-weight: 600;
}

.words-random-length-label span:last-child {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.words-setting-control.disabled,
.words-send-setting-control.disabled {
    opacity: 0.35;
    pointer-events: none;
}

.words-setting-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.words-setting-control input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.words-setting-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-orange);
    cursor: pointer;
    box-shadow: 0 2px 10px var(--accent-orange)40;
    transition: all 0.3s ease;
}

.words-setting-control span {
    font-weight: 600;
    color: var(--accent-orange);
    width: 52px;
    flex-shrink: 0;
    text-align: center;
    font-size: 1.25rem;
}

/* Toggle Switch for Auto-submit */
.words-toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 0.5rem 0;
}

.words-toggle-label span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.words-toggle-switch {
    position: relative;
    width: 52px;
    height: 28px;
}

.words-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.words-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    transition: 0.3s;
    border-radius: 28px;
}

.words-toggle-slider::before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-muted);
    transition: 0.3s;
    border-radius: 50%;
}

.words-toggle-switch input:checked + .words-toggle-slider {
    background-color: var(--accent-orange);
    border-color: var(--accent-orange);
}

.words-toggle-switch input:checked + .words-toggle-slider::before {
    transform: translateX(24px);
    background-color: white;
}

.words-start-btn {
    width: 100%;
    margin-top: 1.5rem;
    padding: 1.25rem 2rem;
    font-size: 1.25rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* Words Game Area */
.words-game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 2rem;
    gap: 1rem;
}

/* Transition states for setup/game switching */
.words-pre-game-setup.transitioning-out {
    animation: setupFadeOut 0.3s ease-in forwards;
}

.words-game-area.transitioning-in {
    animation: gameAreaFadeIn 0.4s ease-out 0.15s both;
}

/* When returning to setup (not first visit), skip child animations */
.words-pre-game-setup.returning .words-setup-card {
    animation: setupCardEnter 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.words-pre-game-setup.returning .words-setup-card h2,
.words-pre-game-setup.returning .words-setting-item,
.words-pre-game-setup.returning .words-start-btn {
    animation: none;
    opacity: 1;
    transform: none;
}

.words-game-area.transitioning-out {
    animation: gameAreaFadeOut 0.25s ease-in forwards;
}

@keyframes setupFadeOut {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.98);
    }
}

@keyframes gameAreaFadeIn {
    0% {
        opacity: 0;
        transform: translateY(15px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gameAreaFadeOut {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-10px);
    }
}

/* Words Audio Controls */
.words-audio-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 0.5rem;
}

/* Replay button spin animation */
.words-audio-controls .modern-play-btn svg {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.words-audio-controls .modern-play-btn.replaying svg {
    transform: rotate(-360deg);
}

/* Words Listening Indicator */
.words-listening-indicator {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Words Letter Slots */
.words-letter-slots {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 1rem 0;
}

/* Word transition animation */
.words-letter-slots.new-word .words-letter-slot {
    animation: slotAppear 0.3s ease-out both;
}

.words-letter-slots.new-word .words-letter-slot:nth-child(1) { animation-delay: 0s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(2) { animation-delay: 0.03s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(3) { animation-delay: 0.06s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(4) { animation-delay: 0.09s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(5) { animation-delay: 0.12s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(6) { animation-delay: 0.15s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(7) { animation-delay: 0.18s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(8) { animation-delay: 0.21s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(9) { animation-delay: 0.24s; }
.words-letter-slots.new-word .words-letter-slot:nth-child(10) { animation-delay: 0.27s; }

@keyframes slotAppear {
    0% {
        opacity: 0;
        transform: translateY(8px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.words-letter-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 50px;
}

.words-letter-display {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    height: 2.5rem;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    text-transform: uppercase;
    font-family: 'JetBrains Mono', monospace;
    font-variant-numeric: slashed-zero;
}

.words-letter-line {
    width: 100%;
    height: 3px;
    background: var(--border-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.words-letter-slot.active .words-letter-line {
    background: var(--accent-orange);
    box-shadow: 0 0 10px var(--accent-orange)60;
}

/* Highlight for current letter being played */
.words-letter-slot.playing .words-letter-line {
    background: var(--accent-orange);
    box-shadow: 0 0 15px var(--accent-orange);
    animation: pulseGlow 0.3s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
    from {
        box-shadow: 0 0 10px var(--accent-orange);
    }
    to {
        box-shadow: 0 0 20px var(--accent-orange), 0 0 30px var(--accent-orange)40;
    }
}

.words-letter-slot.correct .words-letter-display {
    color: var(--success);
}

.words-letter-slot.correct .words-letter-line {
    background: var(--success);
}

.words-letter-slot.incorrect .words-letter-display {
    color: var(--error);
}

.words-letter-slot.incorrect .words-letter-line {
    background: var(--error);
}

/* Hidden input for mobile keyboard */
.words-hidden-input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

/* Words On-screen Keyboard */
.words-keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
    max-width: 500px;
    margin: 0.5rem auto;
}

.words-keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.35rem;
}

.words-key {
    background: var(--bg-secondary);
    border: none;
    border-radius: 8px;
    width: 36px;
    height: 44px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.words-key:active {
    background: var(--accent-orange);
    color: white;
    transform: scale(0.95);
}

.words-key-backspace {
    width: 50px;
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.words-key-backspace:active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Hide keyboard by default, show when enabled */
.words-keyboard {
    display: none;
}

.words-keyboard.visible {
    display: flex;
}

/* Words Submit Button */
.words-submit-btn {
    padding: 1rem 3rem;
    font-size: 1.125rem;
    margin-top: 0.5rem;
}

/* Words Session Stats */
.words-session-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.625rem 1.5rem;
    background: transparent;
    border-radius: 12px;
    border: none;
    margin-bottom: 2rem;
}

.words-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.words-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.words-stat-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: transform 0.2s ease, color 0.2s ease;
}

/* Subtle animation when stat updates */
.words-stat-value.updated {
    transform: scale(1.1);
    color: var(--accent-orange);
}

.words-stat-divider {
    width: 1px;
    height: 28px;
    background: var(--border-color);
    opacity: 0.6;
}

/* Words Options Button */
.words-options-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    opacity: 0.85;
    transition: all 0.2s ease;
}

.words-options-btn:hover {
    opacity: 1;
}

/* Words Result Message */
.words-result-message {
    text-align: center;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 500;
    border-radius: 8px;
    margin-top: 0.5rem;
}

.words-result-message.success {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.words-result-message.error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* Words Mode Mobile Styles */
@media (max-width: 768px) {
    .words-top-bar {
        padding: 1rem;
    }

    .words-title {
        font-size: 1.25rem;
    }

    .words-setup-card {
        padding: 1.5rem;
        margin: 1rem;
    }

    .words-setup-card h2 {
        font-size: 1.25rem;
    }

    .words-game-area {
        padding: 1rem;
        padding-bottom: 2rem;
    }

    .words-letter-slots {
        gap: 0.5rem;
    }

    .words-letter-slot {
        width: 40px;
    }

    .words-letter-display {
        font-size: 1.5rem;
        height: 2rem;
    }

    .words-session-stats {
        padding: 0.5rem 1rem;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    .words-stat-label {
        font-size: 0.75rem;
    }

    .words-stat-value {
        font-size: 1rem;
    }

    .words-submit-btn {
        padding: 0.875rem 2rem;
    }

    /* Mobile keyboard */
    .words-keyboard {
        margin-top: 1rem;
    }

    .words-key {
        width: calc((100vw - 4rem) / 10);
        max-width: 36px;
        height: 42px;
        font-size: 0.95rem;
    }

    .words-key-backspace {
        width: calc((100vw - 4rem) / 7);
        max-width: 50px;
    }
}

/* Extra small screens */
@media (max-width: 400px) {
    .words-letter-slot {
        width: 32px;
    }

    .words-letter-display {
        font-size: 1.25rem;
    }

    .words-submit-btn {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .words-options-btn {
        padding: 0.625rem 1rem;
        font-size: 0.85rem;
    }

    .words-key {
        height: 38px;
        font-size: 0.9rem;
    }
}

/* ===========================================
   ABOUT PAGE STYLES
   =========================================== */

/* Welcome page footer links */
.welcome-footer-links {
    margin-top: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.4s forwards;
}

.footer-link {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
    font-weight: 500;
}

@media (hover: hover) {
    .footer-link:hover {
        color: var(--accent-orange);
    }
}

/* About page container */
.about-container {
    max-width: 800px;
    padding-bottom: 4rem;
}

.about-legal {
    text-align: center;
    margin-top: -1rem;
}

.about-legal a {
    text-decoration: none;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.about-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.about-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--accent-orange);
    display: inline-block;
}

.about-section p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.about-section p:last-child {
    margin-bottom: 0;
}

/* How it works */
.how-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 2.5rem;
    margin-top: 1.5rem;
}

.how-card {
    position: relative;
    padding: 0.25rem 0 0.5rem 0;
}

.how-icon {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.85rem;
    stroke-width: 1.5;
}

.how-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
    position: relative;
    display: inline-block;
    padding-bottom: 0.4rem;
}

.how-card h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 28px;
    height: 2px;
    background: var(--accent-orange);
    border-radius: 2px;
}

.how-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* About list */
.about-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0 0;
}

.about-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    background: var(--accent-orange);
    border-radius: 50%;
}

.about-list li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Contact section */
.contact-section {
    text-align: center;
}

.contact-section h2 {
    display: block;
    border-bottom: none;
    padding-bottom: 0;
}

.contact-section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--accent-orange);
    margin: 0.75rem auto 0;
}

.contact-link {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--accent-orange);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-orange)30;
}

@media (hover: hover) {
    .contact-link:hover {
        background: var(--accent-orange-light);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px var(--accent-orange)40;
    }
}

/* Support section (About page) */
.support-section {
    text-align: center;
}

.support-section h2 {
    display: block;
    border-bottom: none;
    padding-bottom: 0;
}

.support-section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--accent-orange);
    margin: 0.75rem auto 0;
}

.support-link {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--accent-orange);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-orange)30;
}

@media (hover: hover) {
    .support-link:hover {
        background: var(--accent-orange-light);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px var(--accent-orange)40;
    }
}

/* Header Ko-fi link (next to settings button) */
.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.kofi-header-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

@media (hover: hover) {
    .kofi-header-link:hover {
        border-color: var(--accent-orange);
        transform: scale(1.1);
        box-shadow: 0 4px 15px var(--accent-orange)30;
    }
}

/* About page mobile styles */
@media (max-width: 768px) {
    .about-container {
        padding: 1rem;
        padding-top: 4rem;
    }

    .about-section {
        padding: 1.5rem;
    }

    .about-section h2 {
        font-size: 1.25rem;
    }

    .how-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }

    .how-card h3 {
        font-size: 1.05rem;
    }

    .how-card p {
        font-size: 0.9rem;
    }

    .about-list li {
        font-size: 0.95rem;
    }
}

/* ===========================================
   WORDS SEND MODE STYLES
   =========================================== */

.words-send-game-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.words-send-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.words-send-top-bar .page-back-btn {
    position: static;
    flex-shrink: 0;
    z-index: 1;
}

.words-send-top-bar .settings-btn {
    flex-shrink: 0;
    z-index: 1;
}

.words-send-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}

/* Pre-game setup */
.words-send-pre-game-setup {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.words-send-setup-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 10px 40px var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.words-send-setup-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-orange-light), var(--accent-orange));
    border-radius: 16px 16px 0 0;
}

.words-send-setup-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--accent-orange);
    display: inline-block;
}

.words-send-setting-item {
    margin-bottom: 1.5rem;
}

.words-send-setting-item > label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.words-send-setting-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.words-send-setting-control input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.words-send-setting-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-orange);
    cursor: pointer;
    box-shadow: 0 2px 10px var(--accent-orange)40;
    transition: all 0.3s ease;
}

.words-send-setting-control span {
    font-weight: 600;
    color: var(--accent-orange);
    min-width: 2rem;
    text-align: center;
    font-size: 1.25rem;
}

.words-send-start-btn {
    width: 100%;
    margin-top: 1.5rem;
    padding: 1rem;
    font-size: 1.125rem;
}

/* Main game area */
.words-send-game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    padding-bottom: 0;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

/* Session stats */
.words-send-session-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.words-send-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.words-send-stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.words-send-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: transform 0.2s ease;
}

.words-send-stat-value.updated {
    animation: statPop 0.3s ease;
}

@keyframes statPop {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.words-send-stat-divider {
    width: 1px;
    height: 30px;
    background: var(--border-color);
}

/* Target word display */
.words-send-target-word {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    padding: 1.5rem 1rem;
    flex-wrap: wrap;
}

.words-send-letter {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0.5rem;
    padding-bottom: 1.5rem;
    border-radius: 8px;
    width: 3rem;
    flex-shrink: 0;
    position: relative;
}

.words-send-letter:hover {
    background: var(--bg-secondary);
}

.words-send-letter:active {
    transform: scale(0.95);
}

.words-send-letter-char {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    transition: color 0.3s ease;
    font-family: 'JetBrains Mono', monospace;
    font-variant-numeric: slashed-zero;
}

.words-send-letter.correct .words-send-letter-char {
    color: var(--success);
}

.words-send-letter.incorrect .words-send-letter-char {
    color: var(--error);
}

.words-send-letter.current .words-send-letter-char {
    color: var(--accent-orange);
}

.words-send-letter-morse {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    letter-spacing: 1px;
    opacity: 0;
    transition: opacity 0.3s ease;
    position: absolute;
    bottom: -1.25rem;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}

.words-send-letter.show-morse .words-send-letter-morse {
    opacity: 1;
}

/* Progress dots */
.words-send-progress-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem;
}

.words-send-progress-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    transition: all 0.3s ease;
}

.words-send-progress-dot.active {
    background: var(--accent-orange);
    box-shadow: 0 0 8px var(--accent-orange);
}

.words-send-progress-dot.completed {
    background: var(--success);
}

.words-send-progress-dot.error {
    background: var(--error);
}

/* Morse input field */
.words-send-morse-field {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.words-send-morse-field:hover {
    border-color: var(--accent-orange-light);
}

.words-send-morse-field.active {
    border-color: var(--accent-orange);
    box-shadow: 0 0 20px var(--accent-orange)30;
}

.words-send-morse-field.inputting {
    background: var(--accent-orange)10;
    border-color: var(--accent-orange);
    box-shadow: 0 0 30px var(--accent-orange)40;
}

.words-send-morse-display {
    font-size: 2rem;
    font-family: monospace;
    letter-spacing: 4px;
    color: var(--text-primary);
    text-align: center;
    word-break: break-all;
}

.words-send-morse-display .letter-separator {
    color: var(--text-muted);
    margin: 0 0.25rem;
}

/* Submit button */
.words-send-submit-btn {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    margin-top: 0.75rem;
    background: var(--accent-orange);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: center;
    box-shadow: 0 4px 15px var(--accent-orange)40;
}

.words-send-submit-btn:not(.hidden) {
    display: flex;
}

.words-send-submit-btn:hover {
    background: var(--accent-orange-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-orange)50;
}


/* Timing analysis panel */
.words-send-analysis {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    animation: slideIn 0.4s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.words-send-analysis-header {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.words-send-analysis-wpm {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-orange);
}

.words-send-analysis-bars {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.words-send-analysis-bar {
    display: grid;
    grid-template-columns: 90px 1fr 50px;
    align-items: center;
    gap: 0.75rem;
}

.words-send-analysis-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.words-send-analysis-track {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.words-send-analysis-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease, background 0.3s ease;
    width: 0%;
}

.words-send-analysis-fill.excellent {
    background: var(--success);
}

.words-send-analysis-fill.good {
    background: #84cc16;
}

.words-send-analysis-fill.fair {
    background: var(--warning);
}

.words-send-analysis-fill.poor {
    background: var(--error);
}

.words-send-analysis-percent {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
}

/* Action buttons group */
.words-send-action-btns {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    position: relative;
    z-index: 10;
}

.words-send-retry-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.words-send-retry-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.words-send-retry-btn svg {
    fill: currentColor;
}

.words-send-next-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
}

/* Mobile touch area */
.words-send-touch-area {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 150px;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    cursor: pointer;
    transition: all 0.15s ease;
}

.words-send-touch-area:active,
.words-send-touch-area.active {
    background: var(--accent-orange)15;
}

.words-send-touch-area.active .words-send-touch-inner {
    transform: scale(0.98);
    border-color: var(--accent-orange);
    box-shadow: 0 0 30px var(--accent-orange)50;
}

.words-send-touch-inner {
    width: 100%;
    max-width: 400px;
    height: 100%;
    min-height: 100px;
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.words-send-touch-hint {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Chat bubble hint */
.words-send-hint-bubble {
    position: fixed;
    bottom: 200px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    animation: bubbleIn 0.4s ease;
}

@keyframes bubbleIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

.words-send-hint-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 8px 30px var(--shadow-medium);
    font-size: 0.95rem;
    color: var(--text-primary);
}

.words-send-hint-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.2s ease;
}

.words-send-hint-close:hover {
    color: var(--text-primary);
}

/* Pre-game animations */
.words-send-pre-game-setup.animate-in .words-send-setup-card {
    animation: cardSlideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.words-send-pre-game-setup.animate-in .words-send-setup-card h2 {
    animation: setupItemFadeIn 0.4s ease-out 0.1s both;
}

.words-send-pre-game-setup.animate-in .words-send-setting-item:nth-of-type(1) {
    animation: setupItemFadeIn 0.4s ease-out 0.2s both;
}

.words-send-pre-game-setup.animate-in .words-send-setting-item:nth-of-type(2) {
    animation: setupItemFadeIn 0.4s ease-out 0.27s both;
}

.words-send-pre-game-setup.animate-in .words-send-start-btn {
    animation: setupItemFadeIn 0.4s ease-out 0.34s both;
}

@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Transition states for setup/game switching */
.words-send-pre-game-setup.transitioning-out {
    animation: setupFadeOut 0.3s ease-in forwards;
}

.words-send-game-area.transitioning-in {
    animation: gameAreaFadeIn 0.4s ease-out 0.15s both;
}

.words-send-game-area.transitioning-out {
    animation: gameAreaFadeOut 0.25s ease-in forwards;
}

/* When returning to setup (not first visit), skip child stagger animations */
.words-send-pre-game-setup.returning .words-send-setup-card {
    animation: setupCardEnter 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.words-send-pre-game-setup.returning .words-send-setup-card h2,
.words-send-pre-game-setup.returning .words-send-setting-item,
.words-send-pre-game-setup.returning .words-send-start-btn {
    animation: none;
    opacity: 1;
    transform: none;
}

/* Letter cascade animation for target word */
.words-send-target-word.new-word .words-send-letter {
    animation: slotAppear 0.3s ease-out both;
}

.words-send-target-word.new-word .words-send-letter:nth-child(1) { animation-delay: 0s; }
.words-send-target-word.new-word .words-send-letter:nth-child(2) { animation-delay: 0.04s; }
.words-send-target-word.new-word .words-send-letter:nth-child(3) { animation-delay: 0.08s; }
.words-send-target-word.new-word .words-send-letter:nth-child(4) { animation-delay: 0.12s; }
.words-send-target-word.new-word .words-send-letter:nth-child(5) { animation-delay: 0.16s; }
.words-send-target-word.new-word .words-send-letter:nth-child(6) { animation-delay: 0.20s; }
.words-send-target-word.new-word .words-send-letter:nth-child(7) { animation-delay: 0.24s; }
.words-send-target-word.new-word .words-send-letter:nth-child(8) { animation-delay: 0.28s; }
.words-send-target-word.new-word .words-send-letter:nth-child(9) { animation-delay: 0.32s; }
.words-send-target-word.new-word .words-send-letter:nth-child(10) { animation-delay: 0.36s; }

/* Responsive styles */
@media (max-width: 768px) {
    .words-send-top-bar {
        padding: 1rem;
    }

    .words-send-title {
        font-size: 1.25rem;
    }

    .words-send-setup-card {
        padding: 1.5rem;
        margin: 1rem;
    }

    .words-send-game-area {
        padding: 1rem;
        padding-bottom: 0;
    }

    .words-send-letter-char {
        font-size: 2rem;
    }

    .words-send-morse-display {
        font-size: 1.5rem;
    }

    .words-send-session-stats {
        gap: 0.75rem;
        padding: 0.5rem 0.75rem;
    }

    .words-send-stat-value {
        font-size: 1.1rem;
    }

    .words-send-touch-area {
        min-height: 180px;
        padding: 1.5rem;
    }

    .words-send-analysis-bar {
        grid-template-columns: 80px 1fr 45px;
    }

    .words-send-analysis-label {
        font-size: 0.8rem;
    }
}

@media (max-width: 400px) {
    .words-send-letter-char {
        font-size: 1.75rem;
    }

    .words-send-target-word {
        gap: 0.25rem;
        padding: 1rem 0.5rem;
    }

    .words-send-letter {
        padding: 0.25rem;
    }

    .words-send-morse-field {
        min-height: 70px;
    }

    .words-send-morse-display {
        font-size: 1.25rem;
        letter-spacing: 2px;
    }

    .words-send-touch-area {
        min-height: 160px;
    }
}

/* Hide touch area on desktop (only when screen is wide enough) */
@media (hover: hover) and (pointer: fine) and (min-width: 769px) {
    .words-send-touch-area {
        display: none;
    }

    .words-send-game-area {
        padding-bottom: 2rem;
    }
}

/* ============================================================
   SIDEBAR SECTIONS (Collapsible)
   ============================================================ */

.level-section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.4rem;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.level-section-header:first-child {
    margin-top: 2.75rem;
}

@media (hover: hover) {
    .level-section-header:hover {
        border-color: var(--accent-orange);
        background: var(--bg-tertiary);
    }
}

.section-chevron {
    transition: transform 0.2s ease;
    font-size: 0.6rem;
    opacity: 0.5;
}

.level-section-header.collapsed .section-chevron {
    transform: rotate(-90deg);
}

.level-section-header .section-title {
    flex: 1;
    text-align: left;
    margin-bottom: 0;
}

.section-progress {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 0.1rem 0.4rem;
    border-radius: 8px;
}

.level-section-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.15rem 0 0.35rem 0;
    overflow: hidden;
}

.level-section-content.collapsed {
    display: none;
}

.level-label {
    font-weight: 500;
    white-space: nowrap;
}

.level-chars-preview {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.06em;
    opacity: 0.7;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.level-menu-item.active .level-chars-preview {
    color: rgba(255, 255, 255, 0.8);
    opacity: 1;
}

/* Practice level styling */
.level-menu-item.practice-level {
    border-left: 3px solid var(--accent-orange);
    padding-left: calc(0.75rem - 1.5px);
}

.level-menu-item.practice-level .level-label {
    color: var(--accent-orange);
}

.level-menu-item.practice-level.active {
    background: var(--accent-orange);
    border-left-color: var(--accent-orange);
}

.level-menu-item.practice-level.active .level-label {
    color: white;
}

.level-menu-item.practice-level.completed {
    border-left-color: var(--success);
}

.level-menu-item.practice-level.completed .level-label {
    color: var(--success);
}

.level-menu-item.practice-level.active.completed {
    border-left-color: var(--accent-orange);
}

.level-menu-item.practice-level.active.completed .level-label {
    color: white;
}

/* Standalone level (Practice Everything — outside sections) */
.level-menu-item.standalone-level {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-left: 3px solid var(--accent-orange);
    padding-left: calc(0.75rem - 1.5px);
    background: var(--bg-tertiary);
}

.level-menu-item.standalone-level .level-label {
    color: var(--accent-orange);
    font-weight: 600;
    font-size: 0.85rem;
}

.level-menu-item.standalone-level.active {
    background: var(--accent-orange);
    border-left-color: var(--accent-orange);
}

.level-menu-item.standalone-level.active .level-label {
    color: white;
}

.level-menu-item.standalone-level.completed {
    border-left-color: var(--success);
}

.level-menu-item.standalone-level.completed .level-label {
    color: var(--success);
}

.level-menu-item.standalone-level.active.completed {
    border-left-color: var(--accent-orange);
}

.level-menu-item.standalone-level.active.completed .level-label {
    color: white;
}

/* ============================================================
   PRACTICE LEVEL INTRO SHOWCASE
   ============================================================ */

.practice-showcase {
    display: flex !important;
    justify-content: center;
}

.practice-summary {
    text-align: center;
    padding: 1rem 1.5rem;
}

.practice-summary-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================================
   KEYBOARD — Number and Symbol rows
   ============================================================ */

.keyboard-row-numbers .key,
.keyboard-row-symbols .key {
    font-size: 1.1rem;
}

/* On mobile, adapt keyboard for combined mode */
@media (max-width: 768px) {
    .keyboard-row-symbols .key,
    .keyboard-row-numbers .key {
        width: calc((100vw - 4rem) / 11);
        max-width: 45px;
        height: 45px;
        font-size: 0.9rem;
        min-width: 30px;
    }

    /* Compact mode for combined (many rows) */
    .keyboard-row-symbols .key,
    .keyboard-row-numbers .key {
        height: 40px;
    }

    .level-section-header {
        padding: 0.5rem 0.65rem;
        font-size: 0.75rem;
    }

    .level-section-header:first-child {
        margin-top: 1rem;
    }

    .level-menu-item .level-chars-preview {
        font-size: 0.7rem;
    }
}