:root {
    --accent: #C5322E;
    --accent-dark: #8A1F1D;
    --text: #0F0F0F;
    --muted: #4A4A4A;
    --surface: #F9F7F2;
    --card: #FFFFFF;
    --border: #111111;
    --shadow: 0 25px 60px rgba(15, 15, 15, 0.08);
    --radius: 28px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Lucida Console', monospace;
    font-size: 16px;
    line-height: 1.6;
    background: var(--surface);
    color: var(--text);
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 48px 24px 96px;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.25s ease;
}

a:hover {
    color: var(--accent-dark);
    text-decoration: underline;
}

.page-header {
    position: relative;
    padding: 30px 28px 34px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    overflow: hidden;
}

.page-header::after {
    content: '';
    position: absolute;
    inset: 18px;
    border: 1px dashed rgba(0, 0, 0, 0.2);
    border-radius: calc(var(--radius) - 14px);
    pointer-events: none;
}

.page-header > * {
    position: relative;
}

.return-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: 18px;
}

.eyebrow {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    margin: 0 0 12px;
}

.page-header h1 {
    margin: 0;
    font-size: clamp(26px, 3.2vw, 40px);
}

.page-lede {
    margin-top: 16px;
    font-size: 16px;
    color: var(--muted);
    max-width: 720px;
}

.meta-grid {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.meta-card {
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
}

.meta-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--muted);
    margin-bottom: 6px;
}

.meta-value {
    margin: 0;
    font-size: 16px;
}

.section-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    margin-bottom: 28px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.05);
}

.section-title {
    margin-top: 0;
    font-size: 20px;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.tag {
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 13px;
    background: var(--surface);
}

.timeline {
    margin-top: 24px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
}

.timeline h4 {
    margin-top: 0;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-size: 13px;
    color: var(--muted);
}

.concept-grid,
.study-grid,
.meta-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.concept-box,
.study-card,
.meta-tile {
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
}

.concept-box h4,
.study-card h3,
.meta-tile h4 {
    margin-top: 0;
    color: var(--accent);
}

.list-spaced li {
    margin-bottom: 10px;
}

.reference-list {
    columns: 2;
    column-gap: 32px;
    padding-left: 18px;
}

.reference-list li {
    break-inside: avoid;
    margin-bottom: 14px;
}

.image-frame {
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 18px;
    background: var(--card);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.image-frame img {
    width: 100%;
    border-radius: 16px;
}

.project-links {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow);
    margin-top: 48px;
}

.button-row {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.quick-links {
    justify-content: flex-start;
    margin-top: 18px;
}

.button {
    padding: 12px 28px;
    border-radius: 999px;
    border: 2px solid var(--border);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.button.primary {
    background: var(--accent);
    color: #fff;
}

.button.secondary {
    background: transparent;
    color: var(--text);
}

.link-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.link-list li {
    margin-bottom: 10px;
}

@media (max-width: 720px) {
    main {
        padding: 32px 16px 80px;
    }
    .reference-list {
        columns: 1;
    }
    .page-header,
    .section-card {
        padding: 20px;
    }
}