/* ============================================
   GSAP VAULT DESIGN SYSTEM
   ============================================ */

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

:root {
    /* Core colors */
    --black: #0a0a0a;
    --dark: #111111;
    --surface: #1a1a1a;
    --surface-light: #242424;
    --border: #2a2a2a;
    --border-light: #3a3a3a;

    /* Text hierarchy */
    --text: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #999999;

    /* Accent colors - CHOOSE ONE per effect */
    --lime: #c8ff00;        /* Energetic, techy */
    --lime-dim: #a8d900;
    --purple: #a855f7;      /* Creative, premium */
    --purple-light: #c084fc;
    --orange: #ff6b35;      /* Warm, playful */
    --orange-light: #ff8c5a;
    --cyan: #22d3ee;        /* Cool, modern */
    --pink: #ff3366;        /* Bold, vibrant */

    /* Set chosen accent (change per effect) */
    --accent: var(--purple);

    /* Easing - matches GSAP patterns */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);
}

html {
    scroll-behavior: auto;
}

body {
    background: var(--black);
    color: var(--text);
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-weight: 400;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

::selection {
    background: var(--accent);
    color: var(--black);
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--surface-light);
    border-radius: 5px;
    border: 2px solid var(--black);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

/* Syne for display/headlines */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Syne', system-ui, sans-serif;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

/* JetBrains Mono for code/labels */
code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background: var(--surface);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    text-align: center;
    margin-bottom: 6rem;
    padding-top: 2rem;
}

.page-title {
    font-size: clamp(2.5rem, 7vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ============================================
   EXAMPLE SECTIONS
   ============================================ */
.example {
    margin-bottom: 8rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid var(--border);
}

.example:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.example-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.example-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.1em;
}

.example-title {
    font-family: 'Space Grotesk', system-ui, sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.example-content {
    padding-left: 3rem;
}

.example-instruction {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

/* ============================================
   LABELS
   ============================================ */
.label {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
}

/* ============================================
   EFFECT-SPECIFIC STYLES: PARALLAX HERO
   ============================================ */

.parallax-hero {
    position: relative;
    height: 92vh;
    min-height: 540px;
    overflow: clip;
    border-radius: 24px;
    border: 1px solid var(--border);
    background: linear-gradient(180deg, var(--dark) 0%, var(--black) 100%);
}

/* Every layer fills the hero and is moved by GSAP */
.parallax-layer {
    position: absolute;
    inset: -12% 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    will-change: transform;
    pointer-events: none;
}

/* --- Background blobs (pure CSS, no images) --- */
.hero-blob {
    position: absolute;
    border-radius: 50%;
}

.hero-blob--violet {
    width: min(560px, 70vw);
    height: min(560px, 70vw);
    top: 2%;
    left: -8%;
    background: radial-gradient(circle at 35% 35%, rgba(168, 85, 247, 0.55) 0%, rgba(168, 85, 247, 0) 68%);
}

.hero-blob--magenta {
    width: min(480px, 62vw);
    height: min(480px, 62vw);
    bottom: -4%;
    right: -6%;
    background: radial-gradient(circle at 60% 40%, rgba(255, 51, 102, 0.35) 0%, rgba(255, 51, 102, 0) 70%);
}

.hero-blob--indigo {
    width: min(420px, 55vw);
    height: min(420px, 55vw);
    top: 24%;
    right: 14%;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.4) 0%, rgba(99, 102, 241, 0) 66%);
}

/* Faint dot grid for extra depth on the mid layer */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 34px 34px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

/* --- Mid layer: headline --- */
.parallax-layer--title {
    gap: 1.25rem;
    text-align: center;
}

.hero-kicker {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--accent);
}

.hero-title {
    font-family: 'Syne', system-ui, sans-serif;
    font-size: clamp(3.25rem, 11vw, 8rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.04em;
    text-transform: uppercase;
}

.hero-title span {
    background: linear-gradient(90deg, var(--purple-light), var(--purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* --- Foreground layer: label strip --- */
.parallax-layer--strip {
    justify-content: flex-end;
    padding-bottom: 16%;
}

.hero-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 2.5rem;
    padding: 0.9rem 2rem;
    border: 1px solid var(--border-light);
    border-radius: 100px;
    background: rgba(10, 10, 10, 0.7);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
}

.hero-strip span:nth-child(odd) {
    color: var(--accent);
}

/* --- Content section below the hero --- */
.after-hero {
    max-width: 620px;
    padding: 2rem 0 4rem;
}

.after-hero-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin: 0.75rem 0 1.5rem;
}

.after-hero-copy {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: 3rem 1.5rem;
    }

    .page-header {
        margin-bottom: 4rem;
    }

    .example {
        margin-bottom: 5rem;
        padding-bottom: 3rem;
    }

    .example-content {
        padding-left: 0;
    }

    .parallax-hero {
        height: 80vh;
        min-height: 460px;
        border-radius: 16px;
    }

    .hero-strip {
        gap: 0.5rem 1.25rem;
        padding: 0.75rem 1.25rem;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .parallax-layer {
        transform: none !important;
        opacity: 1 !important;
        will-change: auto;
    }
}

/* ============================================
   SCREEN READER ONLY (for ARIA live regions)
   ============================================ */
.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;
}