/* ==========================================================================
   David Louda – Ultra Modern Light Theme
   ========================================================================== */

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

:root {
    --white: #ffffff;
    --off-white: #f8f9fc;
    --gray-50: #f1f3f8;
    --gray-100: #e4e7ee;
    --gray-200: #c9cdd8;
    --gray-400: #8b92a5;
    --gray-600: #5a6178;
    --gray-800: #2d3142;
    --gray-900: #1a1d2e;
    --black: #0d0f1a;

    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-dark: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --accent-glow-strong: rgba(99, 102, 241, 0.3);

    --green: #10b981;
    --yellow: #f59e0b;
    --red: #ef4444;
    --blue: #3b82f6;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.1), 0 8px 20px rgba(0,0,0,0.04);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    font-family: var(--font-sans);
    background: var(--white);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Particles Canvas --- */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* --- Container --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
    background: linear-gradient(180deg, var(--white) 0%, var(--off-white) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

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

/* --- Name / Glitch --- */
.glitch {
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--gray-900);
    position: relative;
    margin-bottom: 16px;
    animation: fadeInUp 1s ease-out;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    overflow: hidden;
    color: var(--gray-900);
    pointer-events: none;
}

.glitch::before {
    animation: glitch-1 4s infinite linear alternate-reverse;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    text-shadow: 2px 0 var(--accent);
}

.glitch::after {
    animation: glitch-2 4s infinite linear alternate-reverse;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    text-shadow: -2px 0 var(--red);
}

@keyframes glitch-1 {
    0%, 95% { transform: translateX(0); }
    96% { transform: translateX(-3px); }
    97% { transform: translateX(3px); }
    98% { transform: translateX(-1px); }
    99% { transform: translateX(2px); }
    100% { transform: translateX(0); }
}

@keyframes glitch-2 {
    0%, 95% { transform: translateX(0); }
    96% { transform: translateX(3px); }
    97% { transform: translateX(-3px); }
    98% { transform: translateX(2px); }
    99% { transform: translateX(-1px); }
    100% { transform: translateX(0); }
}

/* --- Subtitle --- */
.subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-weight: 400;
    color: var(--gray-400);
    margin-bottom: 40px;
    letter-spacing: 0.04em;
    animation: fadeInUp 1s ease-out 0.2s both;
}

/* ==========================================================================
   Countdown Timer
   ========================================================================== */
.countdown {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 16px 16px;
    min-width: 90px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.countdown-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.countdown-item.highlight {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-color: var(--accent);
}

.countdown-item.highlight .countdown-value,
.countdown-item.highlight .countdown-label {
    color: var(--white);
}

.countdown-value {
    font-family: var(--font-mono);
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.1;
    min-width: 2ch;
    text-align: center;
}

.countdown-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 6px;
}

/* ==========================================================================
   Life Stats
   ========================================================================== */
.life-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--gray-400);
    font-weight: 500;
}

/* --- Scroll Hint --- */
.scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeInUp 1s ease-out 1s both;
}

.scroll-hint span {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--gray-200);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--gray-200);
    border-bottom: 2px solid var(--gray-200);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.5; }
    50% { transform: rotate(45deg) translateY(6px); opacity: 1; }
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.title-icon {
    font-size: 1.2em;
}

.title-badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.5em;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 4px 12px;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

/* ==========================================================================
   Sleep Section
   ========================================================================== */
.sleep-section {
    background: var(--off-white);
}

.sleep-hero-card {
    display: flex;
    align-items: center;
    gap: 40px;
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
    border: 1px solid var(--gray-100);
}

.sleep-score-ring {
    position: relative;
    width: 120px;
    height: 120px;
    flex-shrink: 0;
}

.sleep-score-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.score-bg {
    fill: none;
    stroke: var(--gray-100);
    stroke-width: 8;
}

.score-fill {
    fill: none;
    stroke: var(--accent);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: calc(2 * 3.14159 * 54);
    stroke-dashoffset: calc(2 * 3.14159 * 54 * (1 - var(--score) / 100));
    transition: stroke-dashoffset 1.5s ease-out;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
}

.score-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.sleep-comment {
    flex: 1;
}

.comment-text {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.5;
    margin-bottom: 8px;
}

.comment-meta {
    font-size: 0.85rem;
    color: var(--gray-400);
}

/* Sleep Day Grid */
.sleep-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 32px;
}

.sleep-day-card {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.sleep-day-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.day-date {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.day-score {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.day-bar {
    height: 4px;
    background: var(--gray-100);
    border-radius: 2px;
    overflow: hidden;
}

.day-bar-fill {
    height: 100%;
    width: calc(var(--score) * 1%);
    border-radius: 2px;
    transition: width 1s ease-out;
    background: linear-gradient(90deg, var(--red), var(--yellow), var(--green));
    background-size: 200% 100%;
    background-position: calc((100 - var(--score)) * 1%) 0;
}

/* Sleep Insights */
.sleep-insights {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.insight-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--white);
    padding: 20px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.insight-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.insight-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.insight-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.insight-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

.insight-text {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.5;
}

/* Sleep Fun Facts */
.sleep-fun-facts {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.fun-fact {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--white);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-100);
    flex: 1;
    min-width: 260px;
}

.fact-emoji {
    font-size: 1.4rem;
}

.fact-text {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.fact-text strong {
    color: var(--gray-900);
}

/* Sleep Connect Card */
.sleep-connect-card {
    text-align: center;
    padding: 60px 40px;
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--gray-200);
}

.connect-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.sleep-connect-card p {
    font-size: 1.1rem;
    color: var(--gray-400);
    margin-bottom: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-dark);
    box-shadow: 0 4px 20px var(--accent-glow-strong);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--gray-50);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-100);
    transform: translateY(-1px);
}

/* ==========================================================================
   Facts Section
   ========================================================================== */
.facts-section {
    background: var(--white);
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.fact-card {
    background: var(--off-white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.fact-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.fact-card-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    display: block;
}

.fact-card-value {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
    display: block;
}

.fact-card-label {
    font-size: 0.85rem;
    color: var(--gray-400);
    line-height: 1.4;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--gray-100);
    text-align: center;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--gray-400);
}

.separator {
    margin: 0 8px;
    color: var(--gray-200);
}

/* ==========================================================================
   Oura Fact Cards (in Fun Facts grid)
   ========================================================================== */
.oura-fact {
    border: 1px solid rgba(99, 102, 241, 0.15);
    background: linear-gradient(135deg, #f5f3ff 0%, var(--white) 100%);
    position: relative;
}

.oura-fact::before {
    content: '💍';
    position: absolute;
    top: 10px;
    right: 12px;
    font-size: 0.7rem;
    opacity: 0.4;
}

.oura-fact .fact-card-value small {
    font-size: 0.55em;
    font-weight: 500;
    color: var(--gray-400);
}

.bio-age-card {
    background: linear-gradient(135deg, #ecfdf5 0%, #f5f3ff 100%);
    border-color: rgba(34, 197, 94, 0.2);
}

.bio-age-card::before {
    content: '🧬';
}

/* ==========================================================================
   Sleep Trend Line
   ========================================================================== */
.sleep-trend-line {
    text-align: center;
    font-size: 0.88rem;
    color: var(--gray-500);
    margin: 20px 0 0;
    padding: 12px 20px;
    background: var(--white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-100);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Intersection Observer Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .countdown {
        gap: 8px;
    }

    .countdown-item {
        min-width: 70px;
        padding: 14px 10px 12px;
    }

    .sleep-hero-card {
        flex-direction: column;
        text-align: center;
        padding: 28px;
        gap: 24px;
    }

    .life-stats {
        gap: 20px;
    }

    .sleep-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 8px;
    }

    .sleep-day-card {
        padding: 12px;
    }

    .sleep-fun-facts {
        flex-direction: column;
    }

    .section {
        padding: 60px 0;
    }

    .facts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .countdown-item {
        min-width: 55px;
        padding: 10px 6px 8px;
    }

    .countdown-value {
        font-size: 1.3rem;
    }

    .countdown-label {
        font-size: 0.6rem;
    }

    .glitch {
        font-size: 2.4rem;
    }
}

/* Selection */
::selection {
    background: var(--accent-glow-strong);
    color: var(--gray-900);
}

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

::-webkit-scrollbar-track {
    background: var(--off-white);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-200);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}