:root {
    --parchment: #F7F3EB;
    --deep-ink: #1B1A17;
    --archival-gold: #C4A265;
    --botanical-fern: #3D6B4F;
    --slate-commentary: #7A7568;
    --tinted-block: #EDE8DC;
    --evidence-red: #8B3A3A;
    --bright-stock: #FDFCF8;

    --font-display: 'Playfair Display', serif;
    --font-body: 'Source Serif 4', serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-smallcaps: 'Cormorant SC', serif;
}

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

html, body {
    width: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--parchment);
    color: var(--deep-ink);
    font-size: clamp(1rem, 1.1vw, 1.125rem);
    line-height: 1.72;
    letter-spacing: 0.005em;
}

/* Header Navigation */
.main-header {
    position: sticky;
    top: 0;
    background-color: var(--parchment);
    border-bottom: 1px solid var(--archival-gold);
    padding: 1rem 2rem;
    z-index: 100;
    transition: all 300ms ease;
}

.main-header.sticky {
    padding: 0.5rem 2rem;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-name {
    font-family: var(--font-smallcaps);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--deep-ink);
}

.header-nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.header-nav a {
    font-family: var(--font-smallcaps);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-decoration: none;
    color: var(--deep-ink);
    text-transform: uppercase;
    transition: color 300ms ease;
    border-bottom: 1px solid transparent;
}

.header-nav a:hover {
    color: var(--archival-gold);
    border-bottom: 1px solid var(--archival-gold);
}

/* Main Content */
main {
    max-width: 1400px;
    margin: 0 auto;
}

/* Spread System */
.spread {
    display: grid;
    grid-template-columns: 1fr 0.5fr 1fr;
    gap: 2rem;
    min-height: 100vh;
    padding: 4rem 2rem;
    align-items: center;
    column-gap: 1rem;
}

.verso {
    grid-column: 1;
}

.gutter {
    grid-column: 2;
    position: relative;
}

.recto {
    grid-column: 3;
}

/* Gutter Elements */
.gutter-rule {
    width: 1px;
    height: 60%;
    background-color: var(--archival-gold);
    opacity: 0.4;
    margin: 0 auto;
}

.gutter-mark {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--slate-commentary);
    display: block;
    text-align: center;
    margin-top: 1rem;
    transform: rotate(90deg);
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

/* Headings */
.verso h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    font-weight: 700;
    color: var(--deep-ink);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-spread .verso h2 {
    font-size: clamp(2.4rem, 6vw, 5.2rem);
    font-weight: 900;
    letter-spacing: -0.02em;
}

.dek {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 400;
    font-style: italic;
    color: var(--slate-commentary);
    margin-bottom: 2rem;
}

/* Body Content */
.verso p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

/* Sidebar Blocks */
.sidebar-block {
    background-color: var(--tinted-block);
    padding: 1.5rem;
    border-left: 2px solid var(--archival-gold);
}

.sidebar-block h3 {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--deep-ink);
    margin-bottom: 1rem;
}

.sidebar-block ul {
    list-style: none;
}

.sidebar-block li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--archival-gold);
    opacity: 0.7;
}

.sidebar-block li:last-child {
    border-bottom: none;
}

/* Hero Spread */
.hero-spread {
    padding: 6rem 2rem;
}

.spread-image {
    width: 100%;
    height: auto;
    filter: saturate(0.82) sepia(0.08);
}

/* Archive Spread */
.archive-spread {
    padding: 4rem 2rem;
}

.archive-content {
    grid-column: 1 / -1;
}

.archive-content h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    font-weight: 700;
    color: var(--deep-ink);
    margin-bottom: 2rem;
}

.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.archive-item {
    background-color: var(--tinted-block);
    padding: 1.5rem;
    border-left: 2px solid var(--archival-gold);
}

.archive-item h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--deep-ink);
    margin-bottom: 0.75rem;
}

.archive-count {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--slate-commentary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Contact Block */
.contact-block {
    line-height: 1.9;
}

.contact-block p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.contact-block strong {
    font-weight: 600;
    color: var(--deep-ink);
}

/* Responsive */
@media (max-width: 768px) {
    .spread {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 2rem 1rem;
    }

    .verso, .gutter, .recto {
        grid-column: 1;
    }

    .gutter {
        display: none;
    }

    .header-nav {
        gap: 1rem;
    }

    .header-nav a {
        font-size: 0.65rem;
    }

    .archive-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeInSpread {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.spread {
    animation: fadeInSpread 600ms ease-out;
}