:root {
    --bg: #f5efe4;
    --bg-accent: #efe3c8;
    --surface: rgba(255, 252, 246, 0.88);
    --surface-strong: #fffdf8;
    --text: #1e2a27;
    --muted: #55635d;
    --line: rgba(30, 42, 39, 0.12);
    --primary: #0f6b5e;
    --primary-strong: #0a4f45;
    --accent: #d58c2c;
    --shadow: 0 24px 60px rgba(24, 35, 32, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --content-width: 1160px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Manrope", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(213, 140, 44, 0.18), transparent 30%),
        radial-gradient(circle at top right, rgba(15, 107, 94, 0.18), transparent 28%),
        linear-gradient(180deg, #faf6ed 0%, var(--bg) 45%, #f8f0e4 100%);
    line-height: 1.65;
}

a {
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.page-shell {
    min-height: 100vh;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(250, 246, 237, 0.8);
    border-bottom: 1px solid rgba(30, 42, 39, 0.08);
}

.site-header-inner,
.hero,
.content-grid,
.site-footer-inner {
    width: min(calc(100% - 2rem), var(--content-width));
    margin: 0 auto;
}

.site-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
    min-width: 0;
}

.brand-mark {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, #178270 100%);
    color: #fff;
    font-family: "Fraunces", Georgia, serif;
    font-size: 1.35rem;
    box-shadow: 0 14px 30px rgba(15, 107, 94, 0.22);
}

.brand-text {
    min-width: 0;
}

.brand-kicker {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.brand-title {
    display: block;
    font-family: "Fraunces", Georgia, serif;
    font-size: 1.15rem;
    font-weight: 600;
}

.top-nav {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    padding: 0.7rem 1rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--muted);
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    background: rgba(15, 107, 94, 0.08);
    color: var(--primary-strong);
    transform: translateY(-1px);
}

.nav-link.is-active {
    background: var(--primary);
    color: #fff;
}

.hero {
    padding: 4.5rem 0 2rem;
}

.hero-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    gap: 1.4rem;
    align-items: stretch;
}

.hero-copy,
.hero-side,
.content-card,
.toc-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.55);
    box-shadow: var(--shadow);
    border-radius: var(--radius-xl);
}

.hero-copy {
    padding: clamp(2rem, 4vw, 3.6rem);
    position: relative;
    overflow: hidden;
}

.hero-copy::after {
    content: "";
    position: absolute;
    inset: auto -3rem -4rem auto;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(213, 140, 44, 0.28), transparent 68%);
    pointer-events: none;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: rgba(15, 107, 94, 0.08);
    color: var(--primary-strong);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 1rem 0 0.9rem;
    font-family: "Fraunces", Georgia, serif;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 0.98;
    letter-spacing: -0.04em;
}

.hero p.lead {
    margin: 0;
    max-width: 56ch;
    color: var(--muted);
    font-size: 1.06rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 1.8rem;
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0.8rem 1.2rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.button-link:hover,
.button-link:focus-visible {
    transform: translateY(-2px);
}

.button-link.primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary) 0%, #158474 100%);
    box-shadow: 0 16px 35px rgba(15, 107, 94, 0.24);
}

.button-link.secondary {
    color: var(--primary-strong);
    background: rgba(15, 107, 94, 0.08);
}

.hero-side {
    padding: 1.4rem;
    display: grid;
    gap: 1rem;
    align-content: start;
}

.highlight-card,
.stat-card {
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    background: var(--surface-strong);
    border: 1px solid var(--line);
}

.highlight-card h2,
.stat-card h2 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    font-family: "Fraunces", Georgia, serif;
}

.highlight-card p,
.stat-card p {
    margin: 0;
    color: var(--muted);
}

.mini-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.stat-value {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--primary-strong);
}

.content-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(260px, 0.42fr);
    gap: 1.4rem;
    padding: 0 0 4.5rem;
    align-items: start;
}

.content-card {
    padding: clamp(1.5rem, 2.5vw, 2.5rem);
}

.content-card + .content-card {
    margin-top: 1.25rem;
}

.content-card h2 {
    margin: 0 0 0.9rem;
    font-family: "Fraunces", Georgia, serif;
    font-size: clamp(1.55rem, 2vw, 2.05rem);
    line-height: 1.15;
}

.content-card h3 {
    margin: 1.4rem 0 0.6rem;
    font-size: 1.05rem;
    color: var(--primary-strong);
}

.content-card p {
    margin: 0 0 1rem;
    color: var(--muted);
}

.content-card ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--muted);
}

.content-card li + li {
    margin-top: 0.72rem;
}

.content-card strong {
    color: var(--text);
}

.toc-wrap {
    position: sticky;
    top: 6.5rem;
}

.toc-card {
    padding: 1.45rem;
}

.toc-card h2 {
    margin: 0 0 0.8rem;
    font-size: 1rem;
    font-family: "Fraunces", Georgia, serif;
}

.toc-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-card li + li {
    margin-top: 0.55rem;
}

.toc-card a {
    display: block;
    text-decoration: none;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    color: var(--muted);
    background: transparent;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.toc-card a:hover,
.toc-card a:focus-visible {
    background: rgba(15, 107, 94, 0.08);
    color: var(--primary-strong);
}

.note-strip {
    margin-top: 1rem;
    padding: 0.95rem 1rem;
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    background: rgba(213, 140, 44, 0.12);
    color: var(--text);
}

.repo-link {
    color: var(--primary-strong);
    word-break: break-word;
}

.site-footer {
    border-top: 1px solid rgba(30, 42, 39, 0.08);
    background: rgba(255, 252, 246, 0.7);
}

.site-footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.4rem 0 2rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.site-footer-inner a {
    color: var(--primary-strong);
}

@media (max-width: 980px) {
    .hero-panel,
    .content-grid {
        grid-template-columns: 1fr;
    }

    .toc-wrap {
        position: static;
    }
}

@media (max-width: 720px) {
    .site-header-inner,
    .site-footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .top-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .hero {
        padding-top: 2.8rem;
    }

    .hero-copy,
    .hero-side,
    .content-card,
    .toc-card {
        border-radius: 22px;
    }

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

@media (max-width: 520px) {
    .site-header-inner,
    .hero,
    .content-grid,
    .site-footer-inner {
        width: min(calc(100% - 1.25rem), var(--content-width));
    }

    .brand {
        width: 100%;
    }

    .nav-link,
    .button-link {
        width: 100%;
    }

    .hero h1 {
        font-size: 2.3rem;
    }
}