/* ============================================
   VERSECRAFT - Poetry Learning Application
   Design System & Styles
   ============================================ */

/* === CSS Variables / Design Tokens === */
:root {
    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Outfit', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Color Palette - Sophisticated Literary Aesthetic */
    --color-ink: #1a1a2e;
    --color-charcoal: #2d2d44;
    --color-slate: #4a4a6a;
    --color-parchment: #f5f1e8;
    --color-cream: #faf8f3;
    --color-ivory: #fffef9;
    --color-white: #ffffff;

    /* Primary Accent - Burgundy/Wine */
    --accent-primary: #8b2942;
    --accent-primary-light: #a33d55;
    --accent-primary-dark: #722f37;
    --accent-primary-muted: rgba(139, 41, 66, 0.15);

    /* Secondary Accents */
    --accent-burgundy: #8b2942;
    --accent-wine: #722f37;
    --accent-gold: #c9a227;
    --accent-brass: #b5a642;
    --accent-sage: #7a9178;
    --accent-forest: #4a6741;
    --accent-navy: #2c3e50;
    --accent-coral: #e07a5f;
    --accent-terracotta: #c4856c;

    /* Functional Colors */
    --color-success: #4a9079;
    --color-error: #c75146;
    --color-warning: #d4a84b;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 50%, #3d3d5c 100%);
    --gradient-primary: linear-gradient(135deg, #8b2942 0%, #a33d55 50%, #722f37 100%);
    --gradient-gold: linear-gradient(135deg, #8b2942 0%, #a33d55 50%, #722f37 100%);
    --gradient-parchment: linear-gradient(180deg, #ffffff 0%, #faf8f3 100%);

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Typography Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 4.5rem;
    --text-7xl: 6rem;

    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 40px rgba(139, 41, 66, 0.2);
    --shadow-inset: inset 0 2px 4px rgba(0,0,0,0.06);

    /* Focus Ring */
    --focus-ring: 0 0 0 3px rgba(139, 41, 66, 0.4);
    --focus-ring-offset: 0 0 0 2px var(--color-white);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
    --z-cursor: 9999;
}

/* === Reduced Motion Support === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .cursor,
    .cursor-follower {
        display: none !important;
    }
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-ink);
    background: var(--color-cream);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: var(--color-ink);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-parchment);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-wine);
}

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

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

/* === Custom Cursor === */
.cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: var(--z-cursor);
    transform: translate3d(-50%, -50%, 0);
    transition: width 0.2s ease, height 0.2s ease;
    mix-blend-mode: difference;
    will-change: transform;
}

.cursor-follower {
    position: fixed;
    top: 0;
    left: 0;
    width: 32px;
    height: 32px;
    border: 1px solid var(--accent-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: calc(var(--z-cursor) - 1);
    transform: translate3d(-50%, -50%, 0);
    transition: width 0.2s ease, height 0.2s ease, border-color 0.2s ease;
    opacity: 0.5;
    will-change: transform;
}

body:hover .cursor {
    transform: translate(-50%, -50%) scale(1);
}

.cursor.hover {
    width: 16px;
    height: 16px;
}

.cursor-follower.hover {
    width: 48px;
    height: 48px;
    border-color: var(--accent-burgundy);
}

/* Hide custom cursor on touch devices */
@media (hover: none) and (pointer: coarse) {
    .cursor,
    .cursor-follower {
        display: none !important;
    }
}

/* === Navigation === */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-2xl);
    background: rgba(250, 248, 243, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

.main-nav.scrolled {
    padding: var(--space-md) var(--space-2xl);
    box-shadow: var(--shadow-md);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-ink);
    text-decoration: none;
}

.logo-icon {
    color: var(--accent-burgundy);
    font-size: var(--text-2xl);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-slate);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-burgundy);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-burgundy);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

.nav-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(0, 0, 0, 0.05);
}

.progress-bar {
    height: 100%;
    width: 100%;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    will-change: transform; /* Hint to browser for GPU acceleration */
}

/* === Sections === */
.section {
    min-height: 100vh;
    padding: var(--space-5xl) var(--space-2xl);
    position: relative;
    contain: layout style paint;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-number {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--accent-primary);
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 400;
    color: var(--color-ink);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: var(--text-lg);
    color: var(--color-slate);
    max-width: 600px;
    margin: 0 auto;
}

/* === Hero Section === */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    color: var(--color-ivory);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

/* Flowing Ink Layers - GPU accelerated with transforms */
.ink-layer {
    position: absolute;
    inset: -50%;
    width: 200%;
    height: 200%;
    opacity: 0.6;
    will-change: transform;
}

.ink-layer-1 {
    background: radial-gradient(ellipse at 20% 30%, rgba(139, 41, 66, 0.35) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(163, 61, 85, 0.25) 0%, transparent 45%);
    animation: inkFlow1 20s ease-in-out infinite;
}

.ink-layer-2 {
    background: radial-gradient(ellipse at 70% 20%, rgba(114, 47, 55, 0.3) 0%, transparent 50%),
                radial-gradient(ellipse at 30% 80%, rgba(139, 41, 66, 0.2) 0%, transparent 45%);
    animation: inkFlow2 25s ease-in-out infinite;
}

.ink-layer-3 {
    background: radial-gradient(ellipse at 50% 50%, rgba(163, 61, 85, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 10% 60%, rgba(74, 74, 106, 0.25) 0%, transparent 40%);
    animation: inkFlow3 30s ease-in-out infinite;
}

@keyframes inkFlow1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    33% { transform: translate(5%, -3%) rotate(2deg) scale(1.05); }
    66% { transform: translate(-3%, 5%) rotate(-1deg) scale(0.98); }
}

@keyframes inkFlow2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    33% { transform: translate(-4%, 4%) rotate(-2deg) scale(1.02); }
    66% { transform: translate(6%, -2%) rotate(1deg) scale(1.04); }
}

@keyframes inkFlow3 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    50% { transform: translate(3%, 3%) rotate(1.5deg) scale(1.03); }
}

/* Floating Poetry Words */
.floating-words {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-word {
    position: absolute;
    font-family: var(--font-display);
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-style: italic;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.6);
    opacity: 0;
    left: var(--x);
    top: var(--y);
    animation: floatWord var(--duration) var(--delay) ease-in-out infinite;
    text-shadow: 0 0 30px rgba(139, 41, 66, 0.4);
    will-change: transform, opacity;
}

@keyframes floatWord {
    0%, 100% {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    10%, 90% {
        opacity: 0.15;
    }
    50% {
        opacity: 0.25;
        transform: translateY(-20px) scale(1);
    }
}

/* Decorative Flourish */
.hero-flourish {
    position: absolute;
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
    width: min(400px, 80vw);
    height: auto;
    opacity: 0.5;
}

.flourish-path {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    animation: drawFlourish 3s ease-out forwards, pulseFlourish 4s 3s ease-in-out infinite;
}

@keyframes drawFlourish {
    to { stroke-dashoffset: 0; }
}

@keyframes pulseFlourish {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .ink-layer,
    .float-word,
    .flourish-path {
        animation: none;
    }
    .ink-layer { opacity: 0.4; }
    .float-word { opacity: 0.15; transform: none; }
    .flourish-path { stroke-dashoffset: 0; opacity: 0.3; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-overline {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-7xl);
    font-weight: 300;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s ease forwards;
}

.title-line[data-delay="0.2"] {
    animation-delay: 0.2s;
}

.title-accent {
    font-weight: 600;
    font-style: italic;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-quote {
    margin-bottom: var(--space-3xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero-quote blockquote {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-style: italic;
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-lg) var(--space-2xl);
    border-left: 3px solid var(--accent-primary);
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.quote-author {
    display: block;
    font-family: var(--font-body);
    font-style: normal;
    font-size: var(--text-sm);
    color: var(--accent-primary);
    margin-top: var(--space-md);
    letter-spacing: 0.1em;
}

.hero-cta {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn:focus-visible {
    box-shadow: var(--focus-ring);
}

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

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-glow);
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-ivory);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.02);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    animation: float 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    animation: scrollWheel 1.5s ease-in-out infinite;
}

/* === Meter Section === */
.meter-section {
    background: var(--gradient-parchment);
}

.meter-content {
    display: grid;
    gap: var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
}

/* Scansion Tool */
.scansion-tool {
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.tool-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
}

.tool-desc {
    color: var(--color-slate);
    margin-bottom: var(--space-xl);
}

.scansion-controls {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.scansion-btn {
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    background: var(--color-parchment);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.scansion-btn:hover {
    background: var(--accent-burgundy);
    color: white;
    border-color: var(--accent-burgundy);
    transform: scale(1.02);
}

.scansion-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

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

.scansion-workspace {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-2xl);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.poem-line {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    line-height: 2;
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
}

.syllable {
    position: relative;
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    user-select: none;
}

.syllable:hover {
    background: rgba(139, 41, 66, 0.1);
    transform: scale(1.05);
}

.syllable:focus-visible {
    box-shadow: var(--focus-ring);
}

.syllable.stressed::before {
    content: '/';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--text-2xl);
    color: var(--accent-burgundy);
    font-weight: bold;
}

.syllable.unstressed::before {
    content: 'u';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--text-2xl);
    color: var(--accent-sage);
}

.syllable.stressed {
    color: var(--accent-burgundy);
    font-weight: 600;
}

.scansion-result {
    display: flex;
    gap: var(--space-2xl);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.scansion-result .label {
    font-weight: 500;
    color: var(--color-slate);
    margin-right: var(--space-sm);
}

.scansion-result .value {
    font-family: var(--font-mono);
    color: var(--accent-burgundy);
    font-weight: 600;
}

.example-lines h4 {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--color-slate);
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.example-btn {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    background: transparent;
    border: 1px solid var(--accent-burgundy);
    color: var(--accent-burgundy);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.example-btn:hover {
    background: var(--accent-burgundy);
    color: white;
    transform: scale(1.05);
}

.example-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

/* Feet Visualizer */
.feet-visualizer {
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.feet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.foot-card {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.foot-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.foot-card:focus-visible {
    box-shadow: var(--focus-ring);
}

.foot-card.active {
    border-color: var(--accent-burgundy);
    background: white;
}

.foot-pattern {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding: var(--space-md);
}

.beat {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    transition: transform var(--transition-fast);
}

.beat.stressed {
    background: var(--accent-burgundy);
    transform: scale(1.2);
}

.beat.unstressed {
    background: var(--color-slate);
    opacity: 0.3;
    transform: scale(0.8);
}

.foot-name {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--space-xs);
}

.foot-sound {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--accent-burgundy);
    margin-bottom: var(--space-sm);
}

.foot-example {
    font-size: var(--text-sm);
    color: var(--color-slate);
    font-style: italic;
}

/* Rhythm Visualizer */
.rhythm-visualizer {
    background: var(--color-ink);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    color: var(--color-ivory);
}

.rhythm-visualizer .tool-title {
    color: var(--color-ivory);
}

.rhythm-visualizer .tool-desc {
    color: rgba(255, 255, 255, 0.6);
}

.rhythm-display {
    height: 200px;
    margin: var(--space-xl) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

#rhythm-canvas {
    width: 100%;
    height: 100%;
    will-change: contents;
}

.rhythm-controls {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.rhythm-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--accent-primary);
    color: var(--color-ink);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.rhythm-btn:hover {
    transform: scale(1.05);
}

.rhythm-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

.rhythm-speed {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: rgba(255, 255, 255, 0.7);
}

.rhythm-speed input[type="range"] {
    width: 150px;
    accent-color: var(--accent-primary);
}

/* === Dark Section Background (reusable ink wash effect) === */
.dark-section-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

/* Ink layers for dark sections - subtler than hero */
.dark-section-bg .ink-layer {
    position: absolute;
    inset: -30%;
    width: 160%;
    height: 160%;
    opacity: 0.4;
    will-change: transform;
}

.dark-section-bg .ink-layer-1 {
    background: radial-gradient(ellipse at 15% 25%, rgba(139, 41, 66, 0.25) 0%, transparent 45%),
                radial-gradient(ellipse at 85% 75%, rgba(163, 61, 85, 0.18) 0%, transparent 40%);
    animation: inkFlowSection1 25s ease-in-out infinite;
}

.dark-section-bg .ink-layer-2 {
    background: radial-gradient(ellipse at 75% 15%, rgba(114, 47, 55, 0.2) 0%, transparent 45%),
                radial-gradient(ellipse at 25% 85%, rgba(139, 41, 66, 0.15) 0%, transparent 40%);
    animation: inkFlowSection2 30s ease-in-out infinite;
}

.dark-section-bg .ink-layer-3 {
    background: radial-gradient(ellipse at 50% 50%, rgba(163, 61, 85, 0.1) 0%, transparent 55%),
                radial-gradient(ellipse at 5% 65%, rgba(74, 74, 106, 0.18) 0%, transparent 35%);
    animation: inkFlowSection3 35s ease-in-out infinite;
}

@keyframes inkFlowSection1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    33% { transform: translate(3%, -2%) rotate(1deg) scale(1.03); }
    66% { transform: translate(-2%, 3%) rotate(-0.5deg) scale(0.98); }
}

@keyframes inkFlowSection2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    33% { transform: translate(-3%, 3%) rotate(-1deg) scale(1.02); }
    66% { transform: translate(4%, -1%) rotate(0.5deg) scale(1.03); }
}

@keyframes inkFlowSection3 {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    50% { transform: translate(2%, 2%) rotate(1deg) scale(1.02); }
}

/* Floating words for dark sections - subtler than hero */
.dark-section-bg .floating-words {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.dark-section-bg .float-word {
    position: absolute;
    font-family: var(--font-display);
    font-size: clamp(0.8rem, 2vw, 1.2rem);
    font-style: italic;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.4);
    opacity: 0;
    left: var(--x);
    top: var(--y);
    animation: floatWordSection var(--duration) var(--delay) ease-in-out infinite;
    text-shadow: 0 0 20px rgba(139, 41, 66, 0.3);
    will-change: transform, opacity;
}

@keyframes floatWordSection {
    0%, 100% {
        opacity: 0;
        transform: translateY(15px) scale(0.95);
    }
    10%, 90% {
        opacity: 0.1;
    }
    50% {
        opacity: 0.18;
        transform: translateY(-15px) scale(1);
    }
}

/* Reduced motion support for dark sections */
@media (prefers-reduced-motion: reduce) {
    .dark-section-bg .ink-layer,
    .dark-section-bg .float-word {
        animation: none;
    }
    .dark-section-bg .ink-layer { opacity: 0.3; }
    .dark-section-bg .float-word { opacity: 0.1; transform: none; }
}

/* === Forms Section === */
.forms-section {
    background: var(--color-ink);
    color: var(--color-ivory);
    position: relative;
    overflow: hidden;
}

.forms-section .section-title {
    color: var(--color-ivory);
}

.forms-section .section-desc {
    color: rgba(255, 255, 255, 0.6);
}

.forms-section .section-header,
.forms-section .forms-content {
    position: relative;
    z-index: 1;
}

.forms-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    max-width: 1400px;
    margin: 0 auto;
}

.form-viewer {
    position: relative;
}

.form-canvas-container {
    height: 500px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

#form-canvas {
    width: 100%;
    height: 100%;
    will-change: contents;
}

.form-selector {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    justify-content: center;
}

.form-btn {
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-ivory);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-btn:hover,
.form-btn.active {
    background: var(--accent-primary);
    color: var(--color-ink);
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.form-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

/* Form Details */
.form-details {
    padding: var(--space-xl);
}

.form-info h3 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-xl);
}

.form-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--accent-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-structure h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.rhyme-display {
    margin-bottom: var(--space-2xl);
}

.variant-name {
    display: block;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-sm);
}

.rhyme-pattern {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.rhyme-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: hsla(var(--hue), 60%, 50%, 0.3);
    border: 1px solid hsla(var(--hue), 60%, 50%, 0.6);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-weight: 600;
    color: hsla(var(--hue), 60%, 70%, 1);
}

.form-example h4 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.poem-display {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    font-family: var(--font-display);
    font-size: var(--text-lg);
    line-height: 2;
}

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

.line-num {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.3);
    min-width: 24px;
}

.rhyme-tag {
    margin-left: auto;
    padding: var(--space-xs) var(--space-sm);
    background: hsla(var(--hue), 60%, 50%, 0.3);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
}

/* === Devices Section === */
.devices-section {
    background: var(--gradient-parchment);
}

.devices-content {
    max-width: 1200px;
    margin: 0 auto;
}

.device-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.device-tab {
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: 2px solid var(--color-slate);
    color: var(--color-slate);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.device-tab:hover,
.device-tab.active {
    background: var(--accent-burgundy);
    border-color: var(--accent-burgundy);
    color: white;
    transform: scale(1.02);
}

.device-tab:focus-visible {
    box-shadow: var(--focus-ring);
}

.device-panel {
    display: none;
}

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

.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.device-card {
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.device-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-xl);
}

.device-card:focus-visible {
    box-shadow: var(--focus-ring);
}

.device-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
}

.device-icon svg {
    width: 100%;
    height: 100%;
    fill: var(--accent-burgundy);
}

.device-card h4 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
}

.device-card p {
    color: var(--color-slate);
    margin-bottom: var(--space-md);
}

.device-example {
    background: var(--color-parchment);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
}

.highlight-text {
    font-family: var(--font-display);
    font-size: var(--text-lg);
}

.highlight {
    background: var(--color);
    color: white;
    padding: 0 2px;
    border-radius: 2px;
}

/* Device Demo */
.device-demo {
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.device-demo h3 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    margin-bottom: var(--space-xl);
}

.demo-poem {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    line-height: 2;
}

.demo-analysis {
    background: rgba(122, 145, 120, 0.1);
    border-left: 3px solid var(--accent-sage);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.demo-poems {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.demo-poem-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid var(--accent-burgundy);
    color: var(--accent-burgundy);
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.demo-poem-btn:hover {
    background: var(--accent-burgundy);
    color: white;
    transform: scale(1.05);
}

.demo-poem-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

/* === History Section === */
.history-section {
    background: linear-gradient(180deg, var(--color-ink) 0%, #2d2d44 100%);
    color: var(--color-ivory);
    overflow: hidden;
    position: relative;
}

.history-section .section-title {
    color: var(--color-ivory);
}

.history-section .section-desc {
    color: rgba(255, 255, 255, 0.6);
}

.history-section .section-header,
.history-section .history-content {
    position: relative;
    z-index: 1;
}

.history-content {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.timeline-container {
    position: relative;
}

#timeline-canvas {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.timeline {
    position: relative;
    padding: var(--space-2xl) 0;
}

.timeline-track {
    display: flex;
    overflow-x: auto;
    gap: var(--space-xl);
    padding: var(--space-xl);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.timeline-track::-webkit-scrollbar {
    height: 8px;
}

.timeline-track::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
}

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

.era {
    flex: 0 0 300px;
    scroll-snap-align: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
    cursor: pointer;
}

.era:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--era-color);
    transform: translateY(-8px) scale(1.02);
}

.era:focus-visible {
    box-shadow: var(--focus-ring);
}

.era-marker {
    width: 16px;
    height: 16px;
    background: var(--era-color);
    border-radius: 50%;
    margin-bottom: var(--space-lg);
    box-shadow: 0 0 20px var(--era-color);
}

.era-label {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.era-label span {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.5);
    font-weight: 400;
    margin-top: var(--space-xs);
}

.era-content h4 {
    color: var(--era-color);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.era-poets {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.poet-tag {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
}

.era-desc {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* === Practice Section === */
.practice-section {
    background: var(--gradient-parchment);
}

.practice-content {
    max-width: 900px;
    margin: 0 auto;
}

.exercise-selector {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.exercise-btn {
    padding: var(--space-md) var(--space-xl);
    background: var(--color-ivory);
    border: 2px solid var(--color-slate);
    color: var(--color-slate);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.exercise-btn:hover,
.exercise-btn.active {
    background: var(--accent-burgundy);
    border-color: var(--accent-burgundy);
    color: white;
    transform: scale(1.02);
}

.exercise-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

.exercise-panel {
    display: none;
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

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

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

.exercise-header h3 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
}

.score-display {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--accent-burgundy);
}

.score-value {
    font-weight: 700;
}

.exercise-prompt {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.exercise-workspace {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-2xl);
    margin-bottom: var(--space-xl);
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.exercise-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.action-btn {
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    transform: scale(1.02);
}

.action-btn:focus-visible {
    box-shadow: var(--focus-ring);
}

.check-btn {
    background: var(--accent-burgundy);
    color: white;
    border: none;
}

.check-btn:hover {
    background: var(--accent-wine);
}

.next-btn {
    background: transparent;
    color: var(--accent-burgundy);
    border: 1px solid var(--accent-burgundy);
}

.next-btn:hover {
    background: var(--accent-burgundy);
    color: white;
}

.hint-btn {
    background: transparent;
    color: var(--color-slate);
    border: 1px solid var(--color-slate);
}

.hint-btn:hover {
    background: var(--color-slate);
    color: white;
}

.exercise-feedback {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    display: none;
}

.exercise-feedback.show {
    display: block;
}

.exercise-feedback.correct {
    background: rgba(74, 144, 121, 0.1);
    border-left: 3px solid var(--color-success);
    color: var(--color-success);
}

.exercise-feedback.incorrect {
    background: rgba(199, 81, 70, 0.1);
    border-left: 3px solid var(--color-error);
    color: var(--color-error);
}

/* Rhyme Workspace */
.rhyme-workspace {
    background: var(--color-parchment);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    line-height: 2;
}

.rhyme-input {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.rhyme-input label {
    font-weight: 500;
}

.rhyme-input input {
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    border: 2px solid var(--color-slate);
    border-radius: var(--radius-sm);
    width: 150px;
    text-align: center;
}

.rhyme-input input:focus {
    outline: none;
    border-color: var(--accent-burgundy);
}

.rhyme-input input:focus-visible {
    box-shadow: var(--focus-ring);
}

/* Progress Tracker */
.progress-tracker {
    position: relative;
    background: var(--color-ivory);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    margin-top: var(--space-3xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.progress-tracker::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.progress-tracker h4 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    margin-bottom: var(--space-xl);
    text-align: center;
    color: var(--color-ink);
}

.progress-bars {
    display: grid;
    gap: var(--space-lg);
}

.progress-item {
    display: grid;
    grid-template-columns: 120px 1fr 50px;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
}

.progress-label {
    font-size: var(--text-sm);
    color: var(--color-slate);
    font-weight: 500;
}

.progress-bar-container {
    height: 8px;
    background: var(--color-parchment);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: var(--progress);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-percent {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--accent-burgundy);
    text-align: right;
    font-weight: 600;
}

/* === Footer === */
.site-footer {
    background: var(--color-ink);
    color: var(--color-ivory);
    padding: var(--space-4xl) var(--space-2xl) var(--space-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand .logo-icon {
    color: var(--accent-primary);
}

.footer-brand .logo-text {
    font-family: var(--font-display);
    font-size: var(--text-xl);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-md);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-links a:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.footer-quote blockquote {
    font-family: var(--font-display);
    font-style: italic;
    color: rgba(255, 255, 255, 0.6);
    border-left: 2px solid var(--accent-primary);
    padding-left: var(--space-lg);
}

.footer-quote cite {
    display: block;
    margin-top: var(--space-sm);
    color: var(--accent-primary);
    font-style: normal;
    font-size: var(--text-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--text-sm);
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

/* === Responsive === */
@media (max-width: 1024px) {
    .forms-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }

    .footer-quote {
        text-align: left;
    }
}

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.5rem;
        --text-6xl: 3rem;
        --text-7xl: 4rem;
    }

    .main-nav {
        padding: var(--space-md);
    }

    .nav-links {
        display: none;
    }

    .section {
        padding: var(--space-3xl) var(--space-lg);
    }

    .hero-cta {
        flex-direction: column;
    }

    .scansion-controls {
        flex-direction: column;
    }

    .feet-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .device-tabs {
        flex-direction: column;
        align-items: center;
    }

    .exercise-selector {
        flex-direction: column;
        align-items: center;
    }

    .progress-item {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .cursor,
    .cursor-follower {
        display: none;
    }
}