/* datatelomere.com - Generative Organic / Bioluminescent */

:root {
    --abyssal-navy: #080B14;
    --specimen-dark: #0D1520;
    --telomere-teal: #2DD4A8;
    --helix-cyan: #67E8F9;
    --membrane-white: #E8ECF1;
    --faded-strand: #7B8BA3;
    --replication-amber: #F5A623;
    --bioluminescent-green: #0FFF95;
}

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
}

body {
    background: var(--abyssal-navy);
    color: var(--membrane-white);
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: clamp(0.95rem, 1.1vw, 1.125rem);
    line-height: 1.75;
    overflow-x: hidden;
}

/* === BACKGROUND CANVAS === */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* === NAVIGATION === */
.nav-indicator {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 100;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    flex-direction: row-reverse;
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid var(--telomere-teal);
    cursor: pointer;
    transition: box-shadow 0.3s ease;
    flex-shrink: 0;
}

.nav-dot:hover {
    box-shadow: 0 0 8px rgba(45,212,168,0.4);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    opacity: 0;
    transform: translateX(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.nav-indicator:hover .nav-menu {
    opacity: 1;
    transform: translateX(0);
    pointer-events: all;
}

.nav-link {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--faded-strand);
    text-decoration: none;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--telomere-teal);
}

/* === NUCLEUS (HERO) === */
.nucleus {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    scroll-snap-align: start;
}

.helix-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.nucleus-content {
    position: relative;
    z-index: 2;
    padding-left: 15%;
    max-width: 600px;
}

.hero-title {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(3rem, 7vw, 6rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.1;
    color: var(--membrane-white);
    margin-bottom: 24px;
}

.hero-tagline {
    color: var(--faded-strand);
    font-size: clamp(0.9rem, 1.1vw, 1.05rem);
    max-width: 420px;
    opacity: 0;
    animation: fadeIn 1s ease-out 1.5s forwards;
}

/* === MEMBRANE SECTION === */
.membrane {
    min-height: 150vh;
    position: relative;
    padding: 10vh 8vw;
    display: flex;
    flex-direction: column;
    gap: 8vh;
}

.membrane-panel {
    position: relative;
    background: rgba(12, 18, 36, 0.85);
    padding: clamp(2rem, 4vw, 4rem);
    max-width: 560px;
    transition: filter 0.5s ease, opacity 0.5s ease;
    will-change: transform, opacity, filter;
}

.membrane-panel.blur {
    filter: blur(2px);
    opacity: 0.6;
}

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

.membrane-border rect {
    animation: membraneFlow 8s linear infinite;
}

.panel-a { align-self: flex-start; }
.panel-b { align-self: flex-end; }
.panel-c { align-self: flex-start; margin-left: 12vw; }
.panel-d { align-self: flex-end; margin-right: 5vw; }

.panel-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--telomere-teal);
    display: block;
    margin-bottom: 12px;
}

.panel-heading {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--membrane-white);
    margin-bottom: 16px;
}

.membrane-panel p {
    color: var(--faded-strand);
}

/* === REPLICATION FORK === */
.replication {
    min-height: 80vh;
    padding: 10vh 8vw;
    position: relative;
}

.replication-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-heading {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--membrane-white);
    margin-bottom: 12px;
}

.section-desc {
    color: var(--faded-strand);
    max-width: 500px;
    margin: 0 auto;
}

.fork-container {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--telomere-teal) transparent;
    padding-bottom: 20px;
}

.fork-container::-webkit-scrollbar {
    height: 3px;
}

.fork-container::-webkit-scrollbar-thumb {
    background: var(--telomere-teal);
    border-radius: 2px;
}

.fork-track {
    display: flex;
    gap: 30px;
    padding: 20px 0;
    width: max-content;
}

.fork-card {
    min-width: 340px;
    max-width: 400px;
    background: rgba(12, 18, 36, 0.85);
    border: 1px solid rgba(45, 212, 168, 0.2);
    padding: 30px;
    scroll-snap-align: center;
    flex-shrink: 0;
    will-change: transform;
}

.fork-card h3 {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--membrane-white);
    margin-bottom: 12px;
}

.fork-card p {
    color: var(--faded-strand);
    font-size: 0.95rem;
}

.fork-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 8px;
}

.fork-original .fork-label {
    color: var(--telomere-teal);
}

.fork-replica .fork-label {
    color: var(--helix-cyan);
}

.fork-diagram {
    width: 100%;
    height: 60px;
    margin-top: 20px;
}

.fork-path {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 1.5s ease-out;
}

.replication.in-view .fork-path {
    stroke-dashoffset: 0;
}

/* === TELOMERE CAP (CLOSING) === */
.telomere-cap {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10vh 8vw;
    position: relative;
    background: linear-gradient(to bottom, var(--abyssal-navy), var(--specimen-dark));
}

.cap-content {
    max-width: 600px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.cap-heading {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--membrane-white);
    margin-bottom: 24px;
}

.cap-text {
    color: var(--faded-strand);
    margin-bottom: 20px;
}

.entropy-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.cap-domain {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--faded-strand);
    text-align: center;
    margin-top: 60px;
    position: relative;
    z-index: 2;
    opacity: 0.6;
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes membraneFlow {
    from { stroke-dashoffset: 0; }
    to { stroke-dashoffset: 36; }
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .nucleus-content {
        padding-left: 8%;
    }

    .membrane {
        padding: 8vh 5vw;
    }

    .membrane-panel {
        max-width: 100%;
    }

    .panel-b,
    .panel-d {
        align-self: flex-start;
    }

    .panel-c {
        margin-left: 0;
    }

    .fork-card {
        min-width: 280px;
    }

    .replication {
        padding: 8vh 5vw;
    }
}