/**
 * Ultimate Showcase - Main Styles
 * Base styles, layout, and component definitions
 */

/* ========================================
   BASE STYLES & RESET
   ======================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

/* Focus Styles */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.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;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   SKIP LINK (Accessibility)
   ======================================== */

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-tooltip);
    padding: var(--space-3) var(--space-6);
    background: var(--color-primary);
    color: var(--text-inverse);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: var(--space-4);
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--container-padding);
    max-width: var(--container-max);
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand i {
    color: var(--color-primary);
    font-size: var(--text-2xl);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-8);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
    width: 100%;
}

.nav-controls {
    display: flex;
    gap: var(--space-3);
}

.control-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--text-xl);
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-4);
    flex-direction: column;
    gap: var(--space-4);
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-medium);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mobile-menu a:hover,
.mobile-menu a:focus {
    background: var(--hover-bg);
}

/* ========================================
   MAIN CONTENT & SECTIONS
   ======================================== */

.main-content {
    padding-top: var(--header-height);
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

.section-fullscreen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--space-8);
}

.section-title {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-6);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: var(--leading-relaxed);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ========================================
   FORM ELEMENTS
   ======================================== */

.select-input,
.range-input {
    width: 100%;
    padding: var(--space-3);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    transition: border-color var(--transition-fast);
}

.select-input:focus,
.range-input:focus {
    border-color: var(--color-primary);
}

.range-input {
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    padding: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
}

/* ========================================
   PARTICLES SECTION
   ======================================== */

.webgl-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.particles-info {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.info-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.info-badge i {
    color: var(--color-primary);
}

/* ========================================
   GAME SECTION
   ======================================== */

.game-container {
    max-width: 800px;
    margin: 0 auto;
}

.game-ui {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.score-board {
    display: flex;
    gap: var(--space-8);
}

.score-item {
    text-align: center;
}

.score-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.score-value {
    display: block;
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    font-family: var(--font-mono);
}

.game-controls {
    display: flex;
    gap: var(--space-3);
}

.game-board-wrapper {
    position: relative;
    display: inline-block;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

#game-canvas {
    display: block;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    max-width: 100%;
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.game-overlay.active {
    opacity: 1;
    visibility: visible;
}

.overlay-content {
    text-align: center;
    color: white;
}

.overlay-content h3 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
}

.overlay-content p {
    font-size: var(--text-xl);
    margin-bottom: var(--space-6);
}

.game-instructions {
    text-align: center;
    margin-top: var(--space-6);
    color: var(--text-secondary);
}

.game-instructions i {
    color: var(--color-primary);
}

/* ========================================
   SORTING SECTION
   ======================================== */

.sorting-container {
    max-width: 1000px;
    margin: 0 auto;
}

.sorting-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    align-items: flex-end;
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(var(--glass-blur));
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.control-group label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

.range-value {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-weight: var(--font-semibold);
}

.control-buttons {
    display: flex;
    gap: var(--space-3);
    margin-left: auto;
}

.sorting-bars {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 2px;
    height: 400px;
    padding: var(--space-6);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-8);
}

.sorting-bar {
    flex: 1;
    max-width: 20px;
    background: var(--color-primary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: height var(--transition-fast), background-color var(--transition-fast);
}

.sorting-bar.comparing {
    background: var(--color-warning);
}

.sorting-bar.swapping {
    background: var(--color-danger);
}

.sorting-bar.sorted {
    background: var(--color-success);
}

.algorithm-info {
    padding: var(--space-6);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(var(--glass-blur));
}

.algo-info-panel {
    display: none;
}

.algo-info-panel.active {
    display: block;
}

.algo-info-panel h4 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    color: var(--color-primary);
}

.algo-info-panel p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: var(--leading-relaxed);
}

.complexity {
    display: flex;
    gap: var(--space-4);
}

.complexity-badge {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-family: var(--font-mono);
}

.complexity-badge strong {
    color: var(--color-accent);
}

/* ========================================
   AUDIO SECTION
   ======================================== */

.audio-container {
    max-width: 900px;
    margin: 0 auto;
}

.audio-source-controls {
    margin-bottom: var(--space-8);
}

.source-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    border-bottom: 2px solid var(--border-primary);
}

.source-tab {
    padding: var(--space-3) var(--space-6);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.source-tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.source-tab.active,
.source-tab:hover {
    color: var(--text-primary);
}

.source-tab.active::after {
    transform: scaleX(1);
}

.source-panel {
    display: none;
    text-align: center;
    padding: var(--space-8);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

.source-panel.active {
    display: block;
}

.help-text {
    margin-top: var(--space-4);
    color: var(--text-tertiary);
}

.file-upload {
    margin-bottom: var(--space-6);
}

.file-upload input[type="file"] {
    display: none;
}

.file-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.file-label:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

#audio-player {
    width: 100%;
    max-width: 400px;
}

.visualizer-controls {
    margin-bottom: var(--space-8);
}

.viz-mode-selector {
    text-align: center;
}

.viz-mode-selector label {
    display: block;
    margin-bottom: var(--space-4);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

.mode-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.mode-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mode-btn.active,
.mode-btn:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    border-color: var(--color-primary);
}

.audio-canvas {
    width: 100%;
    max-width: 800px;
    height: 300px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    display: block;
    margin: 0 auto var(--space-6);
}

.audio-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    color: var(--color-primary);
    font-weight: var(--font-semibold);
}

.volume-bar {
    width: 200px;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.volume-fill {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    transition: width 50ms linear;
}

/* ========================================
   GALLERY SECTION
   ======================================== */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

.glass-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--color-primary-rgb), 0.15) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.glass-card:hover .card-glow {
    opacity: 1;
}

.card-content {
    position: relative;
    z-index: 1;
}

.profile-avatar {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    color: white;
    margin-bottom: var(--space-5);
}

.profile-avatar.gradient-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.profile-avatar.gradient-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.profile-avatar.gradient-4 {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.profile-avatar.gradient-5 {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.profile-avatar.gradient-6 {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-5);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

/* Typography Showcase */
.typography-showcase {
    text-align: center;
    padding: var(--space-12);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(var(--glass-blur));
}

.showcase-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-8);
    color: var(--text-primary);
}

.text-effects {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.gradient-text {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent), var(--color-primary));
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 5s linear infinite;
}

.glitch-text {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    position: relative;
}

.typewriter-text {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    color: var(--color-accent);
}

.scramble-text {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.footer-brand i {
    color: var(--color-primary);
}

.footer-credits {
    color: var(--text-secondary);
}

.footer-credits i {
    color: var(--color-danger);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

.footer-links a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--text-sm);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-primary);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
    .nav-links {
        gap: var(--space-6);
    }
    
    .section-title {
        font-size: var(--text-4xl);
    }
    
    .gradient-text {
        font-size: var(--text-3xl);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-4);
    }
    
    .nav-links,
    .nav-controls {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .mobile-menu.active {
        display: flex;
    }
    
    .section {
        padding: var(--space-16) 0;
    }
    
    .section-title {
        font-size: var(--text-3xl);
    }
    
    .section-description {
        font-size: var(--text-lg);
    }
    
    .sorting-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-buttons {
        margin-left: 0;
        justify-content: center;
    }
    
    .game-ui {
        flex-direction: column;
    }
    
    .score-board {
        justify-content: center;
    }
    
    #game-canvas {
        width: 100%;
        height: auto;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .gradient-text {
        font-size: var(--text-2xl);
    }
    
    .glitch-text {
        font-size: var(--text-xl);
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: var(--text-2xl);
    }
    
    .control-buttons {
        flex-direction: column;
    }
    
    .mode-buttons {
        flex-direction: column;
    }
    
    .mode-btn {
        width: 100%;
        justify-content: center;
    }
    
    .audio-stats {
        flex-direction: column;
        gap: var(--space-4);
    }
}