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

:root {
    --parchment: #faf3e6;
    --linen: #f0e4cc;
    --ink: #1a1714;
    --umber: #3d3529;
    --dust: #8a7d6a;
    --honeycomb: #d4922a;
    --terracotta: #c4705a;
    --verdigris: #3a8a7a;
    --bone: #e8dcc8;
    --violet: #7a5aaf;
    --dark-face: #d4c4a4;
    --font-display: 'Bricolage Grotesque', sans-serif;
    --font-body: 'Nunito Sans', sans-serif;
    --font-mono: 'DM Mono', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--parchment);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.2vw + 0.6rem, 1.25rem);
    line-height: 1.65;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 3rem);
}

/* === Neubrutalist Press === */
.neu-press {
    border: 3px solid var(--ink);
    border-radius: 12px;
    box-shadow: 8px 8px 0 var(--ink);
    transition: box-shadow 150ms ease, transform 150ms ease;
}

.neu-press:hover {
    box-shadow: 4px 4px 0 var(--ink);
    transform: translate(4px, 4px);
}

.neu-press:active {
    box-shadow: 2px 2px 0 var(--ink);
    transform: translate(6px, 6px);
}

/* === Labels === */
.label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dust);
    display: block;
    margin-bottom: 0.5rem;
}

/* === Section Headings === */
.section-heading {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw + 0.5rem, 3.5rem);
    font-variation-settings: 'wght' 200;
    letter-spacing: -0.02em;
    color: var(--ink);
    transition: font-variation-settings 800ms ease-out;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

.section-heading.in-view {
    font-variation-settings: 'wght' var(--target-weight, 700);
}

/* === Skeleton Loading === */
.skeleton-card {
    position: relative;
}

.skeleton-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    background: linear-gradient(90deg, var(--linen) 25%, var(--bone) 50%, var(--linen) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    z-index: 5;
    opacity: 1;
    transition: opacity 400ms ease;
}

.skeleton-card.revealed::before {
    opacity: 0;
    pointer-events: none;
}

.skeleton-card > * {
    opacity: 0;
    transition: opacity 600ms ease 200ms;
}

.skeleton-card.revealed > * {
    opacity: 1;
}

@keyframes shimmer {
    to { background-position: -200% 0; }
}

/* === Hero === */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--parchment);
    overflow: hidden;
}

.aurora {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 80% 60% at 30% 40%, rgba(212, 146, 42, 0.4) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 70% 60%, rgba(196, 112, 90, 0.3) 0%, transparent 55%),
        radial-gradient(ellipse 70% 50% at 50% 30%, rgba(122, 90, 175, 0.25) 0%, transparent 50%);
    animation: auroraPulse 20s ease-in-out infinite;
    mix-blend-mode: multiply;
}

@keyframes auroraPulse {
    0%, 100% { background-position: 0% 0%, 100% 100%, 50% 50%; }
    33% { background-position: 30% 20%, 70% 80%, 20% 60%; }
    66% { background-position: 60% 40%, 30% 20%, 80% 30%; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw + 1rem, 8rem);
    font-variation-settings: 'wght' 800;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.5rem);
    font-weight: 400;
    color: var(--umber);
    max-width: 50ch;
    margin: 0 auto 3rem;
}

.hero-icons {
    display: flex;
    justify-content: center;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: flex-end;
}

.iso-icon {
    width: clamp(80px, 10vw, 120px);
    height: auto;
    filter: drop-shadow(6px 6px 0 var(--ink));
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.iso-icon.visible {
    opacity: 1;
    transform: translateY(0);
}

.iso-flask { transition-delay: 0ms; }
.iso-telescope { transition-delay: 300ms; margin-bottom: 20px; }
.iso-helix { transition-delay: 600ms; }

/* Bubble animation */
@keyframes bubbleUp {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(-25px); opacity: 0; }
}

.bubble-1 { animation: bubbleUp 3s ease-in-out infinite; }
.bubble-2 { animation: bubbleUp 3s ease-in-out 1.5s infinite; }

/* Sparkle */
@keyframes sparkle {
    0%, 100% { opacity: 1; r: 3; }
    50% { opacity: 0.3; r: 1; }
}
.sparkle { animation: sparkle 2s ease-in-out infinite; }

.scroll-sentinel {
    position: absolute;
    bottom: 10vh;
    height: 1px;
    width: 1px;
}

/* === Aurora Divider === */
.aurora-divider {
    height: 60px;
    width: 100%;
    background:
        radial-gradient(ellipse 60% 100% at 20% 50%, rgba(212, 146, 42, 0.4) 0%, transparent 70%),
        radial-gradient(ellipse 50% 100% at 50% 50%, rgba(196, 112, 90, 0.3) 0%, transparent 60%),
        radial-gradient(ellipse 60% 100% at 80% 50%, rgba(122, 90, 175, 0.25) 0%, transparent 70%);
    background-color: var(--parchment);
}

/* === Manifesto === */
.manifesto {
    padding: 6rem 0;
}

.manifesto-card {
    background: var(--linen);
    padding: clamp(2rem, 4vw, 4rem);
    transform: rotate(1deg);
    max-width: 800px;
}

.manifesto-card h2 {
    font-size: clamp(1.8rem, 3vw + 0.5rem, 3rem);
    margin-bottom: 1rem;
}

.manifesto-card p {
    color: var(--umber);
    max-width: 62ch;
    line-height: 1.7;
}

/* === Discovery Grid === */
.discovery-grid {
    padding: 6rem 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 2rem;
}

.card {
    background: var(--linen);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    transform: rotate(var(--card-rotation, 0deg));
    position: relative;
}

.card p {
    color: var(--umber);
    max-width: 62ch;
}

.card-icon {
    width: 80px;
    height: 80px;
    margin-top: 1rem;
}

.card-a { grid-column: 1 / 6; grid-row: 1 / 3; z-index: 3; }
.card-b { grid-column: 5 / 10; grid-row: 2; z-index: 2; background: var(--parchment); }
.card-c { grid-column: 8 / 13; grid-row: 1 / 4; z-index: 1; }
.card-d { grid-column: 2 / 8; grid-row: 3; z-index: 4; background: var(--parchment); }
.card-e { grid-column: 1 / 6; grid-row: 4; z-index: 2; }
.card-f { grid-column: 6 / 13; grid-row: 4 / 5; z-index: 3; background: var(--parchment); }

/* === Experiment Rail === */
.experiment-rail {
    padding: 4rem 0;
}

.rail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.rail-nav {
    display: flex;
    gap: 0.75rem;
}

.rail-btn {
    width: 48px;
    height: 48px;
    background: var(--parchment);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
}

.rail-track {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 1rem clamp(1rem, 4vw, 3rem) 2rem;
    scrollbar-width: none;
}

.rail-track::-webkit-scrollbar {
    display: none;
}

.experiment-card {
    flex-shrink: 0;
    width: 280px;
    min-height: 200px;
    background: var(--parchment);
    padding: 1.5rem;
    scroll-snap-align: center;
    position: relative;
    overflow: hidden;
}

.exp-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--honeycomb);
}

.experiment-card[data-accent="#c4705a"] .exp-accent { background: var(--terracotta); }
.experiment-card[data-accent="#3a8a7a"] .exp-accent { background: var(--verdigris); }

.exp-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
}

.experiment-card p {
    color: var(--umber);
    font-size: 0.9rem;
}

/* === The Lab (Dark) === */
.the-lab {
    background: var(--ink);
    padding: 8rem 0;
}

.lab-content {
    display: flex;
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
    flex-wrap: wrap;
    justify-content: center;
}

.lab-microscope {
    width: clamp(150px, 20vw, 200px);
    height: auto;
    flex-shrink: 0;
}

.lab-text {
    max-width: 500px;
}

.lab-heading {
    color: #f5e6c8;
}

.lab-text p {
    color: var(--bone);
    font-weight: 350;
    line-height: 1.7;
}

.the-lab .label {
    color: #b0a48e;
}

/* === Footer === */
.footer {
    background: var(--parchment);
    padding: 3rem 0;
    border-top: 2px solid var(--bone);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-text {
    font-family: var(--font-display);
    font-variation-settings: 'wght' 600;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--umber);
    text-decoration: none;
    transition: color 200ms ease;
}

.footer-link:hover {
    color: var(--honeycomb);
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--dust);
}

/* === Mobile === */
@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .card {
        grid-column: 1 !important;
        grid-row: auto !important;
        margin-bottom: -16px;
        transform: rotate(calc(var(--card-rotation, 0deg) * 0.33));
    }

    .hero-icons {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }

    .iso-telescope {
        margin-bottom: 0;
    }

    .lab-content {
        flex-direction: column;
        text-align: center;
    }

    .footer .container {
        flex-direction: column;
        text-align: center;
    }

    .manifesto-card {
        transform: rotate(0.5deg);
    }
}