/* rational.quest -- Anti-Design Crystalline */
:root {
    --near-black: #1C1C1E;
    --parchment: #F5F1ED;
    --grid-gray: #3A3A3C;
    --mid-gray: #6B6B6E;
    --body-silver: #B8B4B0;
    --gold: #C9A96E;
    --teal: #5B8A8A;
    --signal-red: #C45C4A;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Space Grotesk', sans-serif; font-weight: 400; font-size: 16px; line-height: 1.75; color: var(--body-silver); background: var(--near-black); overflow-x: hidden; }

/* Grid background */
.grid-bg {
    position: fixed;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 59px, rgba(58,58,60,0.04) 59px, rgba(58,58,60,0.04) 60px),
        repeating-linear-gradient(90deg, transparent, transparent 59px, rgba(58,58,60,0.04) 59px, rgba(58,58,60,0.04) 60px);
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.4s;
}
.grid-bg.bright {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 59px, rgba(58,58,60,0.08) 59px, rgba(58,58,60,0.08) 60px),
        repeating-linear-gradient(90deg, transparent, transparent 59px, rgba(58,58,60,0.08) 59px, rgba(58,58,60,0.08) 60px);
}

/* Mono nav */
.mono-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    padding: 16px 40px;
    background: rgba(28,28,30,0.9);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    font-family: 'Space Mono', monospace;
    font-size: 13px;
    opacity: 0;
    transition: opacity 0.3s;
}
.mono-nav.visible { opacity: 1; }
.nav-link {
    color: var(--mid-gray);
    text-decoration: none;
    transition: color 0.2s, text-decoration-color 0.2s;
}
.nav-link:hover { color: var(--gold); text-decoration: line-through; text-decoration-color: var(--gold); }
.nav-sep { color: var(--mid-gray); margin: 0 8px; }

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    padding: 80px 40px;
}

/* Duotone panel */
.duotone-panel {
    display: flex;
    border: 1px solid var(--grid-gray);
    overflow: hidden;
    position: relative;
}
.duo-dark {
    background: var(--near-black);
    padding: 48px 56px;
    position: relative;
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.duo-dark.visible { opacity: 1; transform: translateX(0); }
.duo-light {
    background: var(--parchment);
    padding: 48px 56px;
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.duo-light.visible { opacity: 1; transform: translateX(0); }
.duo-split {
    width: 2px;
    background: repeating-linear-gradient(to bottom, var(--mid-gray) 0px, var(--mid-gray) 4px, transparent 4px, transparent 8px);
    opacity: 0;
    transition: opacity 0.2s ease-out 0.4s;
}
.duo-split.visible { opacity: 1; }

.hero-title {
    font-family: 'Space Mono', monospace;
    font-weight: 700;
    font-size: 48px;
    letter-spacing: 0.02em;
    line-height: 1;
}
.hero-title-light { color: var(--parchment); }
.hero-title-dark { color: var(--near-black); }

.hero-sub {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 16px;
    color: var(--mid-gray);
    margin-top: 24px;
    opacity: 0;
    transition: opacity 0.3s ease-out;
}
.hero-sub.visible { opacity: 1; }

/* Panel ID labels */
.panel-id {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--mid-gray);
    display: block;
    margin-bottom: 16px;
}

/* Crystal wireframes */
.crystal {
    position: absolute;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.5s ease-out;
}
.crystal.visible { opacity: 1; }
.crystal svg { animation: crystal-spin 30s linear infinite; }
@keyframes crystal-spin { from { transform: rotateY(0deg); } to { transform: rotateY(360deg); } }
.crystal-hero { top: 20%; right: 15%; width: 60px; height: 60px; }
.crystal-sm { width: 40px; height: 40px; position: absolute; top: 16px; right: 16px; }
.crystal-right { right: 16px; }
.crystal:hover svg { animation-duration: 15s; }

/* Content */
.quest-content {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 40px 80px;
}

.grid-space { height: 120px; }

/* Content panels */
.content-panel {
    background: rgba(245,241,237,0.92);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border: 1px solid var(--grid-gray);
    padding: 40px;
    position: relative;
    max-height: 2px;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease-out, opacity 0.2s ease-out, border-color 0.25s;
}
.content-panel.visible { max-height: 800px; opacity: 1; }
.content-panel:hover { border-color: var(--gold); }
.content-panel:hover .panel-id { color: var(--signal-red); }

/* Marble panel variant */
.marble-panel {
    background:
        radial-gradient(ellipse at 20% 30%, rgba(229,221,213,0.6) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(216,207,197,0.4) 0%, transparent 40%),
        rgba(245,241,237,0.92);
}

.section-heading {
    font-family: 'Space Mono', monospace;
    font-weight: 700;
    font-size: 32px;
    color: var(--near-black);
    letter-spacing: 0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
}

.body-text {
    color: var(--grid-gray);
    margin-bottom: 16px;
}
.body-text:last-child { margin-bottom: 0; }

/* Small duotone element */
.duo-element {
    display: flex;
    width: 60px;
    height: 30px;
    margin: 0 auto 24px;
    border: 1px solid var(--grid-gray);
}
.duo-half-dark { flex: 1; background: var(--near-black); }
.duo-half-light { flex: 1; background: var(--parchment); }

@media (max-width: 768px) {
    .hero-title { font-size: 32px; }
    .section-heading { font-size: 24px; }
    .content-panel { padding: 28px 24px; }
    .duotone-panel { flex-direction: column; }
    .duo-split { width: 100%; height: 2px; }
    .duo-dark, .duo-light { padding: 32px 24px; }
    .crystal-hero { display: none; }
}