/* Morse Master - Modern Beautiful Design */

/* ========================================
   CSS VARIABLES & THEMES
   ======================================== */
:root {
    /* Base Colors */
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: rgba(255, 255, 255, 0.03);
    
    /* Primary Gradient Colors */
    --primary-500: #0ea5e9;
    --primary-400: #38bdf8;
    --primary-300: #7dd3fc;
    --primary-600: #0284c7;
    
    /* Accent Colors */
    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    --accent-sky: #0ea5e9;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    
    /* Borders */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Light Theme */
body.light-theme {
    --color-bg: #f8fafc;
    --color-bg-elevated: #ffffff;
    --color-bg-card: rgba(255, 255, 255, 0.8);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.2);
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--color-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   AMBIENT BACKGROUND
   ======================================== */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
    will-change: transform;
    transform: translateZ(0);
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-blue));
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-400));
    bottom: -150px;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-sky), var(--accent-blue));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

/* ========================================
   GLASSMORPHISM UTILITIES
   ======================================== */
.glass-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   HEADER
   ======================================== */
.glass-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

body.light-theme .glass-header {
    background: rgba(248, 250, 252, 0.8);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-icon {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pulse-dot {
    width: 12px;
    height: 12px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse-dot 1.5s infinite;
}

.pulse-dash {
    width: 24px;
    height: 8px;
    background: var(--primary-400);
    border-radius: var(--radius-full);
    animation: pulse-dash 1.5s infinite 0.3s;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.9); }
}

@keyframes pulse-dash {
    0%, 100% { opacity: 1; transform: scaleX(1); }
    50% { opacity: 0.5; transform: scaleX(0.95); }
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 2px;
    white-space: nowrap;
}

.home-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--color-bg-card);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-right: 0.75rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.home-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.home-btn svg {
    width: 18px;
    height: 18px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.lang-select {
    padding: 0.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--color-bg-card);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.lang-select:hover {
    border-color: var(--border-hover);
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--color-bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.theme-toggle:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.sun-icon { display: none; }
body.light-theme .sun-icon { display: block; }
body.light-theme .moon-icon { display: none; }

/* ========================================
   NAVIGATION
   ======================================== */
.nav-bar {
    position: sticky;
    top: 65px;
    z-index: 90;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-sm) 0;
}

body.light-theme .nav-bar {
    background: rgba(248, 250, 252, 0.7);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-container::-webkit-scrollbar {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.nav-item:hover {
    background: var(--color-bg-card);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

/* ========================================
   MAIN CONTAINER
   ======================================== */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
    min-height: calc(100vh - 200px);
}

/* ========================================
   SETTINGS CARD
   ======================================== */
.settings-card {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.setting-group {
    flex: 1;
    min-width: 200px;
}

.setting-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.setting-label svg {
    width: 16px;
    height: 16px;
    color: var(--primary-400);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
    transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.slider-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-400);
    min-width: 70px;
    text-align: right;
}

/* ========================================
   STATS CONTAINER
   ======================================== */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

.stat-icon.accuracy {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: var(--accent-green);
}

.stat-icon.streak {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
    color: var(--accent-orange);
}

.stat-icon.best {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(168, 85, 247, 0.1));
    color: var(--accent-blue);
}

.stat-icon.learned {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(34, 211, 238, 0.1));
    color: var(--accent-cyan);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ========================================
   SECTION HEADERS
   ======================================== */
.section-header {
    margin-bottom: var(--space-lg);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   MODE SECTIONS
   ======================================== */
.mode-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.mode-section.active {
    display: block;
}

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

/* ========================================
   CHART CONTAINER
   ======================================== */
.chart-container {
    padding: var(--space-xl);
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.chart-column h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-color);
}

.chart-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-xs);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    gap: var(--space-md);
}

.chart-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(4px);
}

.chart-item .char {
    font-size: 1.25rem;
    font-weight: 700;
    min-width: 60px;
    color: var(--text-primary);
    flex-shrink: 0;
}

.chart-item .morse {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--primary-400);
    letter-spacing: 1px;
    text-align: right;
    flex: 1;
    line-height: 1.4;
}

.chart-item.learned {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.08);
}

.chart-item.in-progress {
    border-color: var(--accent-orange);
    background: rgba(245, 158, 11, 0.08);
}

/* ========================================
   PRACTICE MODES
   ======================================== */
.practice-wrapper {
    max-width: 500px;
    margin: 0 auto;
}

.practice-card {
    padding: var(--space-xl);
}

.practice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.practice-badge {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    border-radius: var(--radius-full);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.icon-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.practice-display {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.target-char {
    font-size: 8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-md);
    text-shadow: var(--shadow-glow);
}

.target-morse {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    color: var(--text-secondary);
    letter-spacing: 4px;
    transition: all var(--transition-base);
}

.target-morse.hidden {
    opacity: 0.2;
    filter: blur(8px);
}

/* Input Section */
.input-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.input-preview {
    height: 80px;
    min-height: 80px;
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    color: var(--primary-400);
    letter-spacing: 6px;
    transition: all var(--transition-fast);
    overflow: hidden;
    white-space: nowrap;
}

body.light-theme .input-preview {
    background: rgba(0, 0, 0, 0.05);
}

.input-preview .placeholder {
    color: var(--text-tertiary);
    font-size: 1rem;
}

.input-pad {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-md);
}

.pad-btn {
    height: 80px;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.pad-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
}



.btn-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    position: relative;
    z-index: 1;
}

.btn-icon {
    font-size: 1.75rem;
    font-weight: 700;
}

.btn-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pad-btn.dot {
    background: linear-gradient(135deg, var(--accent-cyan), #06b6d4);
    color: white;
    box-shadow: 0 4px 14px rgba(34, 211, 238, 0.4);
}

.pad-btn.dash {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.pad-btn.clear {
    background: var(--border-color);
    color: var(--text-secondary);
}

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

.submit-btn {
    height: 56px;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent-green), #059669);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

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

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

/* Decode Specific */
.decode-display {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.listening-indicator {
    margin-bottom: var(--space-xl);
}

.sound-wave {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    height: 60px;
    margin-bottom: var(--space-md);
}

.sound-wave span {
    width: 4px;
    background: linear-gradient(to top, var(--primary-500), var(--accent-cyan));
    border-radius: var(--radius-full);
    animation: wave 1s ease-in-out infinite;
}

.sound-wave span:nth-child(1) { height: 20%; animation-delay: 0s; }
.sound-wave span:nth-child(2) { height: 40%; animation-delay: 0.1s; }
.sound-wave span:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.sound-wave span:nth-child(4) { height: 40%; animation-delay: 0.3s; }
.sound-wave span:nth-child(5) { height: 20%; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); opacity: 0.5; }
    50% { transform: scaleY(1); opacity: 1; }
}

.listening-indicator p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.decode-answer {
    font-size: 8rem;
    font-weight: 800;
    color: var(--text-tertiary);
    line-height: 1;
    transition: all var(--transition-base);
}

.decode-answer.correct {
    color: var(--accent-green);
    animation: bounce 0.5s ease;
}

.decode-answer.wrong {
    color: var(--accent-red);
    animation: shake 0.5s ease;
}

.decode-instruction {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* Decode On-screen Keyboard */
.decode-keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 1rem 0;
    padding: 0 0.5rem;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.key-btn {
    min-width: 32px;
    height: 48px;
    padding: 0 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    flex: 1;
    max-width: 48px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.key-btn.number {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--accent-cyan);
}

.numbers-row {
    margin-top: 0.25rem;
}

/* Callsign Keyboard - Same compact style as decode keyboard */
.callsign-keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 1rem 0;
    padding: 0 0.5rem;
}

.callsign-keyboard .keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.callsign-keyboard .key-btn {
    min-width: 32px;
    height: 48px;
    padding: 0 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    flex: 1;
    max-width: 48px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.callsign-keyboard .key-btn.number {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--accent-cyan);
}

.callsign-keyboard .key-btn.clear,
.callsign-keyboard .key-btn.enter {
    background: var(--primary-500);
    color: white;
    border-color: var(--primary-500);
    max-width: 60px;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Feedback Message */
.feedback-message {
    text-align: center;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    margin-top: var(--space-md);
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.feedback-message.show {
    opacity: 1;
    transform: translateY(0);
}

.feedback-message.correct {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.feedback-message.wrong {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ========================================
   FLASHCARDS
   ======================================== */
.flashcard-wrapper {
    max-width: 400px;
    margin: 0 auto;
}

.flashcard-container {
    perspective: 1000px;
    margin-bottom: var(--space-xl);
}

.flashcard {
    width: 100%;
    height: 280px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.flashcard-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(34, 211, 238, 0.1));
}

.card-char {
    font-size: 7rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-hint {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: var(--space-md);
}

.card-morse {
    font-family: 'JetBrains Mono', monospace;
    font-size: 4rem;
    color: var(--primary-400);
    letter-spacing: 6px;
}

.card-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.flashcard-controls {
    display: flex;
    gap: var(--space-md);
}

.control-btn {
    flex: 1;
    height: 52px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.control-btn svg {
    width: 18px;
    height: 18px;
}

.control-btn.secondary {
    background: var(--border-color);
    color: var(--text-secondary);
}

.control-btn.secondary:hover {
    background: var(--border-hover);
    color: var(--text-primary);
}

.control-btn.primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.control-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

/* ========================================
   QUIZ MODE
   ======================================== */
.quiz-wrapper {
    max-width: 480px;
    margin: 0 auto;
}

.quiz-card {
    padding: var(--space-xl);
    overflow: hidden;
}

.quiz-progress-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-xl);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-cyan));
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
    width: 10%;
}

.quiz-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.quiz-step {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.quiz-question {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.quiz-char-display {
    font-size: 7rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-md);
    line-height: 1;
}

.quiz-instruction {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quiz-input-section .input-preview {
    height: 56px;
    min-height: 56px;
    font-size: 2rem;
    margin-bottom: 1rem;
    overflow: hidden;
    white-space: nowrap;
}

.quiz-input-section .input-preview .placeholder {
    font-size: 0.9rem;
}

.quiz-input-area {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.quiz-input {
    flex: 1;
    height: 64px;
    padding: 0 var(--space-lg);
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    color: var(--text-primary);
    text-align: center;
    letter-spacing: 4px;
    outline: none;
    transition: all var(--transition-fast);
}

body.light-theme .quiz-input {
    background: rgba(0, 0, 0, 0.05);
}

.quiz-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.quiz-input::placeholder {
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

.quiz-submit {
    width: 64px;
    height: 64px;
    border: none;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-fast);
}

.quiz-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.quiz-submit svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   FOOTER
   ======================================== */
.glass-footer {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(10, 10, 15, 0.5);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

body.light-theme .glass-footer {
    background: rgba(248, 250, 252, 0.5);
}

/* ========================================
   MOBILE RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    .header-content {
        padding: var(--space-md);
    }
    
    .logo-title {
        font-size: 1.1rem;
    }
    
    .logo-subtitle {
        font-size: 0.65rem;
        letter-spacing: 1px;
    }
    
    .home-btn {
        padding: 0.5rem;
    }
    
    .home-btn span {
        display: none;
    }
    
    .home-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .nav-container {
        padding: 0 var(--space-md);
        gap: var(--space-xs);
    }
    
    .nav-item {
        padding: var(--space-sm);
    }
    
    .nav-item span {
        display: none;
    }
    
    .main-container {
        padding: var(--space-md);
    }
    
    /* Compact Settings Panel */
    .settings-card {
        padding: var(--space-sm);
        gap: var(--space-sm);
        margin-bottom: var(--space-md);
    }
    
    .setting-group {
        min-width: auto;
        flex: 1;
    }
    
    .setting-label {
        font-size: 0.7rem;
        margin-bottom: 0.25rem;
    }
    
    .setting-label svg {
        width: 12px;
        height: 12px;
    }
    
    .slider-container {
        gap: var(--space-sm);
    }
    
    .slider-value {
        font-size: 0.7rem;
        min-width: 50px;
    }
    
    input[type="range"] {
        height: 4px;
    }
    
    input[type="range"]::-webkit-slider-thumb {
        width: 14px;
        height: 14px;
    }
    
    /* Compact Stats */
    .stats-container {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-xs);
        margin-bottom: var(--space-md);
    }
    
    .stat-item {
        padding: var(--space-xs);
        flex-direction: column;
        text-align: center;
    }
    
    .stat-icon {
        width: 28px;
        height: 28px;
        margin-bottom: 0.25rem;
    }
    
    .stat-icon svg {
        width: 14px;
        height: 14px;
    }
    
    .stat-value {
        font-size: 1rem;
        font-weight: 700;
    }
    
    .stat-label {
        font-size: 0.6rem;
        margin-top: 0;
    }
    
    .chart-container {
        padding: var(--space-md);
    }
    
    .chart-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-sm);
    }

    /* Q-Code and Prosign practice reference tables on mobile - single column */
    #qcodes-list-practice .chart-grid,
    #prosigns-list-practice .chart-grid {
        grid-template-columns: 1fr;
    }

    #qcodes-list-practice .chart-item,
    #prosigns-list-practice .chart-item {
        padding: 0.4rem 0.5rem;
    }

    #qcodes-list-practice .chart-item .char,
    #prosigns-list-practice .chart-item .char {
        font-size: 0.9rem;
        min-width: 40px;
    }

    #qcodes-list-practice .chart-item .morse,
    #prosigns-list-practice .chart-item .morse {
        font-size: 0.75rem;
    }

    /* Abbreviations on mobile */
    #abbreviations-list .chart-grid {
        grid-template-columns: 1fr;
    }

    #abbreviations-list .chart-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    #abbreviations-list .chart-item .char {
        font-size: 1rem;
        min-width: auto;
    }

    #abbreviations-list .chart-item .morse {
        font-size: 0.8rem;
        width: 100%;
        text-align: left;
    }

    /* Abbreviations practice reference table on mobile */
    #abbreviations-list-practice .chart-grid {
        grid-template-columns: 1fr;
    }

    #abbreviations-list-practice .chart-item {
        padding: 0.4rem 0.5rem;
    }

    #abbreviations-list-practice .chart-item .char {
        font-size: 0.9rem;
        min-width: 40px;
    }

    #abbreviations-list-practice .chart-item .morse {
        font-size: 0.75rem;
    }
    
    .chart-column h3 {
        font-size: 0.75rem;
    }
    
    .chart-item {
        padding: 0.5rem;
    }
    
    .chart-item .char {
        font-size: 1rem;
        min-width: 24px;
    }
    
    .chart-item .morse {
        font-size: 0.85rem;
        letter-spacing: 1px;
    }
    
    .practice-card {
        padding: var(--space-lg);
    }
    
    .target-char {
        font-size: 6rem;
    }
    
    .input-preview {
        font-size: 2rem;
        min-height: 70px;
    }
    
    .pad-btn {
        height: 70px;
    }
    
    .flashcard {
        height: 240px;
    }
    
    .card-char {
        font-size: 5rem;
    }
    
    .card-morse {
        font-size: 3rem;
    }
    
    .quiz-char-display {
        font-size: 5rem;
    }
    
    .quiz-input {
        height: 56px;
        font-size: 1.75rem;
    }
    
    .quiz-submit {
        width: 56px;
        height: 56px;
    }
    
    /* Mobile Keyboard */
    .decode-keyboard {
        gap: 0.4rem;
        padding: 0;
    }
    
    .keyboard-row {
        gap: 0.25rem;
    }
    
    .key-btn {
        min-width: 28px;
        height: 42px;
        padding: 0 0.3rem;
        font-size: 0.9rem;
        max-width: 42px;
    }
}

@media (max-width: 480px) {
    .target-char {
        font-size: 5rem;
    }
    
    .input-pad {
        gap: var(--space-sm);
    }
    
    .pad-btn {
        height: 65px;
    }
    
    .btn-icon {
        font-size: 1.5rem;
    }
    
    .decode-answer {
        font-size: 6rem;
    }
    
    /* Smaller keyboard for small phones */
    .key-btn {
        min-width: 32px;
        height: 40px;
        font-size: 0.85rem;
        max-width: 40px;
    }
}

/* Small phones */
@media (max-width: 400px) {
    .chart-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }

    .chart-item {
        padding: 0.4rem;
    }

    .chart-item .char {
        font-size: 0.9rem;
        min-width: 20px;
    }

    .chart-item .morse {
        font-size: 0.75rem;
    }

    /* Practice reference tables on small phones - single column */
    #qcodes-list-practice .chart-grid,
    #prosigns-list-practice .chart-grid {
        grid-template-columns: 1fr;
    }

    #qcodes-list-practice .chart-item,
    #prosigns-list-practice .chart-item {
        padding: 0.35rem 0.5rem;
    }

    #qcodes-list-practice .chart-item .char,
    #prosigns-list-practice .chart-item .char {
        font-size: 0.9rem;
        min-width: 35px;
    }

    #qcodes-list-practice .chart-item .morse,
    #prosigns-list-practice .chart-item .morse {
        font-size: 0.7rem;
    }

    /* Even more compact stats on small phones */
    .stats-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.25rem;
    }

    .stat-item {
        padding: 0.25rem;
    }
    
    .stat-icon {
        width: 24px;
        height: 24px;
    }
    
    .stat-value {
        font-size: 0.9rem;
    }
    
    .stat-label {
        font-size: 0.55rem;
    }
    
    /* Compact keyboard for very small phones */
    .decode-keyboard {
        gap: 0.3rem;
    }
    
    .keyboard-row {
        gap: 0.2rem;
    }
    
    .key-btn {
        min-width: 24px;
        height: 36px;
        font-size: 0.8rem;
        max-width: 36px;
        padding: 0 0.2rem;
    }
}

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

.animate-in {
    animation: fadeInUp 0.5s ease forwards;
}

/* ========================================
   CW COMMUNICATION PRACTICE
   ======================================== */

/* HAM Navigation */
.ham-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    padding: var(--space-sm);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.ham-nav-btn {
    padding: var(--space-sm) var(--space-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.ham-nav-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.ham-nav-btn.active {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
}

/* HAM Subsections */
.ham-subsection {
    display: none;
    animation: fadeIn 0.4s ease;
}

.ham-subsection.active {
    display: block;
}

.ham-reference {
    padding: var(--space-lg);
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
}

/* Abbreviations section - prevent overflow */
#abbreviations-list .chart-item {
    flex-wrap: wrap;
    gap: 0.25rem;
}

#abbreviations-list .chart-item .morse {
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    text-align: left;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .ham-reference {
        padding: var(--space-md);
    }

    #abbreviations-list .chart-item .morse {
        font-size: 0.8rem;
        width: 100%;
    }
}

/* CW Practice Tabs */
.cw-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
}

.cw-tab-btn {
    padding: var(--space-md) var(--space-lg);
    border: none;
    background: var(--color-bg-card);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.cw-tab-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.cw-tab-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-500));
    color: white;
    border-color: transparent;
}

/* CW Subsections */
.cw-subsection {
    display: none;
    animation: fadeIn 0.4s ease;
}

.cw-subsection.active {
    display: block;
}

/* Listen Mode Large Sound Wave */
.sound-wave-large {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    height: 80px;
}

.sound-wave-large span {
    width: 6px;
    background: linear-gradient(to top, var(--primary-500), var(--accent-cyan));
    border-radius: var(--radius-full);
    animation: wave-large 1.2s ease-in-out infinite;
}

.sound-wave-large span:nth-child(1) { height: 20%; animation-delay: 0s; }
.sound-wave-large span:nth-child(2) { height: 40%; animation-delay: 0.1s; }
.sound-wave-large span:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.sound-wave-large span:nth-child(4) { height: 80%; animation-delay: 0.3s; }
.sound-wave-large span:nth-child(5) { height: 100%; animation-delay: 0.4s; }
.sound-wave-large span:nth-child(6) { height: 80%; animation-delay: 0.5s; }
.sound-wave-large span:nth-child(7) { height: 60%; animation-delay: 0.6s; }

@keyframes wave-large {
    0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* Two-way Conversation */
.twoway-conversation {
    scroll-behavior: smooth;
}

.twoway-turn {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.twoway-turn:last-child {
    border-bottom: none;
}

.twoway-turn.dx-turn span:first-child {
    color: var(--accent-cyan);
}

.twoway-turn.me-turn span:first-child {
    color: var(--accent-blue);
}

.twoway-turn.me-turn {
    background: rgba(168, 85, 247, 0.05);
    margin: 0 -1rem;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
}

/* Two-way Input Area */
.twoway-input-area {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.twoway-input-area .input-preview {
    width: 100%;
    box-sizing: border-box;
}

.twoway-input-area .input-pad {
    width: 100%;
}

.twoway-input-area .submit-btn {
    width: 100%;
    margin-top: 0.5rem;
}

/* Two-way conversation text wrapping */
.twoway-turn span:last-child {
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    display: inline-block;
}

/* CW Input Section */
.cw-input-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* Listening indicator */
.listening-indicator-large {
    padding: 2rem 0;
}

/* CW Read Display */
.cw-read-display {
    border: 1px solid var(--border-color);
}

/* Mobile CW Practice */
@media (max-width: 768px) {
    .cw-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .cw-tab-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }
    
    .ham-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
    }
    
    .ham-nav-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.8rem;
    }
    
    .twoway-conversation {
        min-height: 200px;
        max-height: 300px;
        padding: 1rem;
    }

    .twoway-turn {
        font-size: 0.9rem;
    }

    .twoway-input-area {
        gap: 0.75rem;
    }

    .twoway-input-area .submit-btn {
        height: 50px;
        font-size: 0.95rem;
    }

    /* Compact callsign keyboard on mobile */
    .callsign-keyboard {
        gap: 0.35rem;
        padding: 0 0.25rem;
    }
    
    .callsign-keyboard .keyboard-row {
        gap: 0.35rem;
    }
    
    .callsign-keyboard .key-btn {
        min-width: 28px;
        height: 40px;
        padding: 0 0.25rem;
        font-size: 0.875rem;
        max-width: 40px;
    }
    
    .callsign-keyboard .key-btn.clear,
    .callsign-keyboard .key-btn.enter {
        max-width: 50px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   MOBILE PERFORMANCE OPTIMIZATIONS
   ======================================== */

/* Reduce animations on touch devices */
@media (pointer: coarse) {
    .gradient-orb {
        animation-duration: 40s;
        filter: blur(40px);
        opacity: 0.25;
    }
    
    .orb-1 {
        width: 300px;
        height: 300px;
    }
    
    .orb-2 {
        width: 250px;
        height: 250px;
    }
    
    .orb-3 {
        width: 200px;
        height: 200px;
    }
    
    .sound-wave span,
    .sound-wave-large span {
        animation-duration: 2s;
    }
    
    .pulse-dot,
    .pulse-dash {
        animation-duration: 3s;
    }
    
    .glass-card {
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .gradient-orb {
        animation: none;
    }
}

/* Pause sound wave animations when not actively playing */
.sound-wave.paused span,
.sound-wave-large.paused span {
    animation-play-state: paused;
}