:root {
    --bg: #f4efe5;
    --panel: rgba(255, 251, 245, 0.9);
    --panel-strong: #fffdf9;
    --ink: #1f2933;
    --muted: #52606d;
    --line: rgba(31, 41, 51, 0.12);
    --accent: #bf5f2f;
    --accent-deep: #8c3f18;
    --accent-soft: rgba(191, 95, 47, 0.12);
    --shadow: 0 18px 48px rgba(74, 53, 39, 0.12);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --nav-width: 270px;
}

@font-face {
    font-family: "DocsSerif";
    src: url("../PTSerif-Regular.ttf") format("truetype");
    font-display: swap;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(191, 95, 47, 0.22), transparent 28%),
        radial-gradient(circle at 80% 15%, rgba(92, 141, 137, 0.16), transparent 18%),
        linear-gradient(180deg, #f7f2e8 0%, #f2ebdf 45%, #efe6da 100%);
    min-height: 100vh;
}

a {
    color: inherit;
}

.shell {
    width: min(1320px, calc(100vw - 32px));
    margin: 24px auto;
    display: grid;
    grid-template-columns: var(--nav-width) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.sidebar,
.content-card,
.hero,
.summary-card,
.entry,
.callout {
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.sidebar {
    position: sticky;
    top: 20px;
    border-radius: var(--radius-lg);
    padding: 24px 20px;
}

.brand {
    margin-bottom: 24px;
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.brand h1,
.hero h1,
.content-card h2,
.summary-card h3,
.entry h3 {
    font-family: "DocsSerif", Georgia, serif;
    margin: 0;
    line-height: 1.1;
}

.brand h1 {
    font-size: 1.9rem;
}

.brand p,
.hero p,
.section-intro,
.summary-card p,
.entry p,
.entry li,
.callout,
.meta-value {
    color: var(--muted);
    line-height: 1.6;
}

.nav-list,
.mini-list,
.entry ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-list li + li,
.mini-list li + li,
.entry ul li + li {
    margin-top: 8px;
}

.nav-link {
    display: block;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--muted);
    transition: 180ms ease;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--accent-deep);
}

.content {
    display: grid;
    gap: 24px;
}

.hero,
.content-card {
    border-radius: var(--radius-lg);
}

.hero {
    padding: 32px;
    overflow: hidden;
    position: relative;
}

.hero::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(191, 95, 47, 0.24), transparent 68%);
}

.hero h1 {
    font-size: clamp(2.4rem, 4vw, 4rem);
    max-width: 10ch;
}

.hero p {
    max-width: 70ch;
    margin: 16px 0 0;
}

.tag-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(31, 41, 51, 0.08);
    color: var(--ink);
    font-size: 0.92rem;
}

.content-card {
    padding: 28px;
}

.content-card h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 22px;
}

.summary-card {
    border-radius: var(--radius-md);
    padding: 20px;
    text-decoration: none;
    transition: transform 180ms ease, border-color 180ms ease;
}

.summary-card:hover {
    transform: translateY(-2px);
    border-color: rgba(191, 95, 47, 0.36);
}

.summary-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.summary-card .meta {
    margin-top: 12px;
    font-weight: 600;
    color: var(--accent-deep);
}

.mini-list {
    margin-top: 18px;
}

.mini-list strong {
    color: var(--ink);
}

.entry-list {
    display: grid;
    gap: 16px;
    margin-top: 24px;
}

.entry {
    border-radius: var(--radius-md);
    padding: 22px;
}

.entry header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: start;
    margin-bottom: 14px;
}

.route {
    display: inline-flex;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.88rem;
    background: rgba(31, 41, 51, 0.05);
    border-radius: 999px;
    padding: 6px 10px;
    color: var(--muted);
}

.file-chip {
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.82rem;
    color: var(--accent-deep);
}

.entry h3 {
    font-size: 1.45rem;
    margin-bottom: 6px;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin: 18px 0;
}

.meta-item {
    padding: 14px;
    background: var(--panel-strong);
    border: 1px solid rgba(31, 41, 51, 0.06);
    border-radius: var(--radius-sm);
}

.meta-label {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.74rem;
    color: var(--accent);
    margin-bottom: 8px;
    font-weight: 700;
}

.callout {
    padding: 16px 18px;
    border-radius: var(--radius-sm);
    margin-top: 18px;
}

.callout strong {
    color: var(--ink);
}

.footer {
    padding: 8px 4px 36px;
    color: var(--muted);
    font-size: 0.95rem;
}

@media (max-width: 980px) {
    .shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .hero h1 {
        max-width: none;
    }
}

@media (max-width: 640px) {
    .shell {
        width: min(100vw - 20px, 1320px);
        margin: 10px auto 24px;
        gap: 16px;
    }

    .sidebar,
    .hero,
    .content-card {
        padding: 20px;
        border-radius: 20px;
    }

    .entry {
        padding: 18px;
    }

    .entry header {
        flex-direction: column;
    }
}