:root {
    --obsidian: #0A0A0F;
    --dark-marble: #14141F;
    --cracked-cyan: #00F0FF;
    --fracture-magenta: #FF00AA;
    --lichen-volt: #C8FF00;
    --weathered-bone: #E8E0D4;
    --ash-mist: #8A8490;
    --patina-gold: #D4A855;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background: var(--obsidian);
    color: var(--weathered-bone);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.2vw, 1.25rem);
    line-height: 1.75;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(255, 0, 170, 0.25);
}

/* Progress Track */
.progress-track {
    position: fixed;
    right: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--dark-marble);
    z-index: 100;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--cracked-cyan);
    box-shadow: 0 0 8px var(--cracked-cyan);
    transition: height 100ms linear;
}

.progress-node {
    position: absolute;
    left: -2px;
    width: 6px;
    height: 6px;
    background: var(--dark-marble);
    border: 1px solid rgba(0, 240, 255, 0.3);
    transform: translateY(-50%);
}

/* Zone Base */
.zone {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.marble-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.zone-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    width: 100%;
    padding: 0 clamp(2rem, 6vw, 6rem);
}

/* Crack SVGs */
.crack-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.crack-glow {
    fill: none;
    stroke: var(--cracked-cyan);
    stroke-width: 3px;
    filter: blur(4px);
    opacity: 0.6;
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 1.5s ease-out;
}

.crack-line {
    fill: none;
    stroke: var(--patina-gold);
    stroke-width: 1px;
    opacity: 0.6;
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 1.5s ease-out;
}

.crack-magenta { stroke: var(--fracture-magenta); }
.crack-magenta-line { stroke: var(--fracture-magenta); opacity: 0.5; }
.crack-gold { stroke: var(--patina-gold); filter: blur(4px); }
.crack-gold-line { stroke: var(--patina-gold); opacity: 0.7; }

.zone.cracks-visible .crack-glow,
.zone.cracks-visible .crack-line {
    stroke-dashoffset: 0;
}

/* Zone 0: Surface */
.zone-surface {
    background: var(--obsidian);
    flex-direction: column;
}

.surface-content {
    text-align: center;
}

.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-weight: 400;
    font-size: clamp(4rem, 10vw, 9rem);
    letter-spacing: 0.25em;
    line-height: 1;
    background: linear-gradient(135deg, var(--cracked-cyan), var(--fracture-magenta), var(--lichen-volt));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-flow 8s ease-in-out infinite;
    text-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
}

@keyframes gradient-flow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-sub {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    color: var(--ash-mist);
    margin-top: 1rem;
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
}

.chevron-pulse {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    animation: chevron-bob 2s ease-in-out infinite;
}

@keyframes chevron-bob {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* Strata Zones */
.zone-strata {
    background: var(--obsidian);
}

.zone-magenta {
    --zone-accent: var(--fracture-magenta);
}

.strata-content {
    padding-top: 4rem;
    padding-bottom: 4rem;
}

.zone-title {
    font-family: 'Bebas Neue', sans-serif;
    font-weight: 400;
    font-size: clamp(2rem, 6vw, 5rem);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--weathered-bone);
    margin-bottom: 13px;
}

.zone-epigraph {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    color: var(--ash-mist);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
    margin-bottom: 55px;
    max-width: 30ch;
}

/* Fractured Grid */
.fractured-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 34px;
}

.grid-block {
    padding: clamp(1.5rem, 3vw, 2.5rem);
    background: rgba(20, 20, 31, 0.6);
    border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    position: relative;
}

.grid-block p {
    max-width: 45ch;
    color: var(--weathered-bone);
}

.block-meta {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ash-mist);
    display: block;
    margin-bottom: 13px;
}

.block-a { grid-column: 1; transform: translateX(-3px); }
.block-b { grid-column: 2; transform: translateY(5px); }
.block-c { grid-column: 1 / span 2; max-width: 600px; transform: translateX(2px); }
.block-d { grid-column: 2; transform: translateY(-4px); }
.block-e { grid-column: 1; transform: translateX(4px); }
.block-f { grid-column: 2; transform: translateY(3px); }
.block-g { grid-column: 1 / span 2; max-width: 650px; transform: translateX(-2px); }
.block-h { grid-column: 2; transform: translateY(-5px); }

/* Zone Reveal */
.zone-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 600ms ease-out, transform 600ms ease-out;
}

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

.zone-reveal-child {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.zone-reveal.visible .zone-reveal-child:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 80ms; }
.zone-reveal.visible .zone-reveal-child:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 160ms; }
.zone-reveal.visible .zone-reveal-child:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 240ms; }

/* Zone 5: Core */
.zone-core {
    background: var(--obsidian);
}

.neural-veins {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.neural-path {
    fill: none;
    stroke: var(--cracked-cyan);
    stroke-width: 1.5px;
    opacity: 0;
    filter: drop-shadow(0 0 6px var(--cracked-cyan));
    animation: neural-pulse 6s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
}

.neural-magenta {
    stroke: var(--fracture-magenta);
    filter: drop-shadow(0 0 6px var(--fracture-magenta));
}

.neural-volt {
    stroke: var(--lichen-volt);
    filter: drop-shadow(0 0 6px var(--lichen-volt));
}

@keyframes neural-pulse {
    0%, 100% { opacity: 0.1; }
    50% { opacity: 0.4; }
}

.core-content {
    text-align: center;
    max-width: 700px;
}

.core-title {
    font-family: 'Bebas Neue', sans-serif;
    font-weight: 400;
    font-size: clamp(3rem, 8vw, 7rem);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--cracked-cyan), var(--fracture-magenta), var(--lichen-volt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 34px;
}

.core-statement {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    line-height: 1.85;
    color: var(--weathered-bone);
    max-width: 55ch;
    margin: 0 auto;
}

.core-meta {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ash-mist);
    margin-top: 55px;
    opacity: 0.5;
}

/* Ripple Effect */
.ripple-ring {
    position: fixed;
    border-radius: 42% 58% 45% 55% / 52% 48% 55% 45%;
    border: 1px solid rgba(0, 240, 255, 0.3);
    pointer-events: none;
    z-index: 200;
    animation: ripple-expand 800ms ease-out forwards;
    will-change: transform, opacity;
}

.ripple-ring:nth-child(2) { animation-delay: 100ms; }
.ripple-ring:nth-child(3) { animation-delay: 200ms; }

@keyframes ripple-expand {
    0% { width: 0; height: 0; opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    100% { width: 200px; height: 200px; opacity: 0; transform: translate(-50%, -50%) scale(1); }
}

/* Geometric Overlays */
.zone-strata::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 300px;
    border: 1px solid var(--ash-mist);
    border-radius: 50%;
    opacity: 0.04;
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: instrument-rotate 120s linear infinite;
}

@keyframes instrument-rotate {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .fractured-grid {
        grid-template-columns: 1fr;
    }

    .block-a, .block-b, .block-c, .block-d,
    .block-e, .block-f, .block-g, .block-h {
        grid-column: 1;
        transform: none;
    }

    .progress-track { display: none; }
    .chevron-pulse { bottom: 1.5rem; }

    .zone-content {
        padding: 0 1.5rem;
    }

    .zone-strata::after { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .hero-title { animation: none; }
    .chevron-pulse { animation: none; opacity: 0.6; }
    .neural-path { animation: none; opacity: 0.2; }
    .zone-strata::after { animation: none; }

    .zone-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .zone-reveal-child {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .crack-glow, .crack-line {
        stroke-dashoffset: 0;
        transition: none;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--dark-marble); }
::-webkit-scrollbar-thumb { background: var(--cracked-cyan); }