:root {
    --bg: #faf9f7;
    --surface: #ffffff;
    --ink: #1c1b1a;
    --ink-soft: #55504a;
    --ink-faint: #8a8580;
    --accent: #c15f3c;
    --accent-ink: #ffffff;
    --accent-soft: #fbe9e1;
    --line: #ece7e0;
    --insight-bg: #fbf4e9;
    --insight-line: #e8d9b8;
    --max-w: 720px;
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Georgia", "Noto Serif", "Times New Roman", serif;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */

.site-header {
    border-bottom: 1px solid var(--line);
    padding: 22px 0;
    margin-bottom: 8px;
}

.site-header .wrap {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.logo {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
    color: var(--ink);
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.tagline {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 0.85rem;
    color: var(--ink-faint);
}

/* Home page article list */

.hero {
    padding: 40px 0 8px;
}

.hero h1 {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 1.9rem;
    line-height: 1.25;
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.hero p {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    color: var(--ink-soft);
    font-size: 1.02rem;
    margin: 0;
}

.post-list {
    padding: 28px 0 60px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.post-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: border-color 0.15s ease, transform 0.15s ease;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.post-card:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
}

.post-card .post-date {
    font-size: 0.8rem;
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.post-card h2 {
    font-family: "Georgia", "Noto Serif", serif;
    font-size: 1.35rem;
    margin: 0 0 8px;
    color: var(--ink);
}

.post-card .post-excerpt {
    color: var(--ink-soft);
    font-size: 0.95rem;
    margin: 0 0 10px;
}

.post-card .read-more {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Article page */

.breadcrumb {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 0.85rem;
    margin: 24px 0 0;
}

.breadcrumb a {
    color: var(--ink-faint);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--accent);
}

article.post {
    padding-bottom: 72px;
}

.post-header {
    padding: 18px 0 28px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 28px;
}

.post-meta {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 0.85rem;
    color: var(--ink-faint);
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 14px;
}

.post-header h1 {
    font-size: 2rem;
    line-height: 1.22;
    margin: 0 0 14px;
    letter-spacing: -0.01em;
}

.post-lede {
    font-size: 1.1rem;
    color: var(--ink-soft);
    margin: 0;
}

.callout {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    border-radius: 0 10px 10px 0;
    padding: 14px 18px;
    font-size: 0.95rem;
    margin: 24px 0;
}

h2 {
    font-size: 1.4rem;
    margin: 42px 0 14px;
    letter-spacing: -0.01em;
}

p {
    margin: 0 0 16px;
    font-size: 1.05rem;
}

ul.check-list {
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

ul.check-list li {
    padding-left: 30px;
    position: relative;
    font-size: 1.03rem;
}

ul.check-list li::before {
    content: "✔";
    position: absolute;
    left: 0;
    top: 2px;
    color: var(--accent);
    font-size: 0.9rem;
}

.insight {
    background: var(--insight-bg);
    border: 1px solid var(--insight-line);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin: 28px 0;
}

.insight-label {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin-bottom: 10px;
    display: block;
}

.insight p:last-child {
    margin-bottom: 0;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

a:hover {
    text-decoration-thickness: 2px;
}

.source-list {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 0.85rem;
    color: var(--ink-faint);
    margin: 0;
    padding-left: 18px;
}

.source-list li {
    margin-bottom: 4px;
}

.cta {
    margin-top: 44px;
    padding: 24px;
    background: var(--ink);
    color: #fff;
    border-radius: var(--radius);
}

.cta p {
    margin: 0;
    font-size: 1.08rem;
    color: #fff;
}

/* Footer */

.site-footer {
    border-top: 1px solid var(--line);
    padding: 26px 0 40px;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 0.85rem;
    color: var(--ink-faint);
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.55rem;
    }
    .post-header h1 {
        font-size: 1.6rem;
    }
    .post-card, .insight {
        padding: 18px;
    }
}