:root {
  --c-bg: #f7f7f5;
  --c-surface: #ffffff;
  --c-text: #1a1a1a;
  --c-muted: #5a5a5a;
  --c-border: #e4e4e0;
  --c-accent: #c44b1a;
  --c-accent-dark: #9c3a13;
  --c-secondary: #1f3a5f;
  --c-tag-bg: #efece6;
  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --container: 1180px;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Merriweather", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--c-bg); color: var(--c-text); font-family: var(--font-sans); line-height: 1.55; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.site-header { background: #fff; border-bottom: 1px solid var(--c-border); position: sticky; top: 0; z-index: 50; }
.header-row { display: flex; align-items: center; gap: 32px; padding: 14px 20px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--c-text); }
.brand:hover { text-decoration: none; }
.brand-mark { background: var(--c-accent); color: #fff; width: 38px; height: 38px; border-radius: var(--radius); display: grid; place-items: center; font-weight: 700; font-size: 20px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 18px; }
.brand-text small { color: var(--c-muted); font-size: 12px; }
.primary-nav { flex: 1; }
.primary-nav ul { display: flex; gap: 6px; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; }
.primary-nav a { color: var(--c-secondary); padding: 8px 12px; border-radius: var(--radius); font-weight: 500; font-size: 14px; }
.primary-nav a:hover { background: var(--c-tag-bg); text-decoration: none; }
.primary-nav a.active { background: var(--c-secondary); color: #fff; }

.breadcrumbs { padding-top: 18px; font-size: 13px; color: var(--c-muted); }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumbs li + li::before { content: "/"; margin-right: 6px; color: var(--c-border); }
.breadcrumbs a { color: var(--c-muted); }

.site-main { padding: 28px 20px 60px; }

.hero { background: linear-gradient(135deg, var(--c-secondary), #2d4f7f); color: #fff; border-radius: var(--radius); padding: 36px 32px; margin-bottom: 32px; }
.hero h1 { font-family: var(--font-serif); font-size: 32px; margin: 0 0 8px; }
.hero p { margin: 0; opacity: 0.9; max-width: 700px; }

.section-title { font-family: var(--font-serif); font-size: 24px; margin: 32px 0 16px; border-bottom: 2px solid var(--c-accent); padding-bottom: 6px; }

.article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 22px; }

.article-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; transition: box-shadow 0.18s ease, transform 0.18s ease; }
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-cover { display: block; aspect-ratio: 16/9; overflow: hidden; background: var(--c-tag-bg); }
.card-cover img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-category { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--c-accent); font-weight: 600; }
.card-title { margin: 0; font-family: var(--font-serif); font-size: 19px; line-height: 1.3; }
.card-title a { color: var(--c-text); }
.card-title a:hover { color: var(--c-accent); text-decoration: none; }
.card-excerpt { color: var(--c-muted); font-size: 14px; margin: 0; }
.card-meta { font-size: 12px; color: var(--c-muted); display: flex; gap: 12px; margin-top: auto; padding-top: 8px; border-top: 1px solid var(--c-border); }

.featured .article-card { display: grid; grid-template-columns: 1.4fr 1fr; }
.featured .card-cover { aspect-ratio: auto; height: 100%; }
.featured .card-title { font-size: 26px; }
@media (max-width: 720px) { .featured .article-card { grid-template-columns: 1fr; } }

.categories-block { margin-top: 16px; }
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.category-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 16px 18px; color: var(--c-text); transition: border-color 0.18s; }
.category-card:hover { border-color: var(--c-accent); text-decoration: none; }
.category-card h3 { margin: 0 0 6px; font-family: var(--font-serif); }
.category-card p { margin: 0; color: var(--c-muted); font-size: 13px; }

.page-header { margin-bottom: 22px; }
.page-header h1 { font-family: var(--font-serif); font-size: 32px; margin: 0 0 8px; }
.page-header p { color: var(--c-muted); margin: 0; }

.empty-state { color: var(--c-muted); padding: 40px 0; text-align: center; }

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }
.pagination a { padding: 8px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); color: var(--c-secondary); background: #fff; }
.pagination a:hover { border-color: var(--c-accent); text-decoration: none; }
.pagination a.current { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }

.article-header { margin-bottom: 22px; }
.article-category { font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--c-accent); font-weight: 600; }
.article-header h1 { font-family: var(--font-serif); font-size: 36px; line-height: 1.2; margin: 8px 0 12px; }
.article-lead { color: var(--c-muted); font-size: 18px; margin: 0 0 16px; }
.article-meta { display: flex; gap: 18px; color: var(--c-muted); font-size: 13px; margin-bottom: 20px; }
.article-cover { width: 100%; max-height: 460px; object-fit: cover; border-radius: var(--radius); }

.article-layout { display: grid; grid-template-columns: 240px 1fr; gap: 36px; align-items: start; }
@media (max-width: 880px) { .article-layout { grid-template-columns: 1fr; } }

.article-toc { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 18px 18px 18px 22px; position: sticky; top: 80px; font-size: 14px; }
.article-toc h2 { font-family: var(--font-serif); font-size: 16px; margin: 0 0 10px; }
.article-toc ol { list-style: none; padding: 0; margin: 0; }
.article-toc li { margin: 4px 0; }
.article-toc li.level-3 { padding-left: 14px; font-size: 13px; }
.article-toc a { color: var(--c-secondary); }
@media (max-width: 880px) { .article-toc { position: static; } }

.article-body { font-family: var(--font-serif); font-size: 17px; line-height: 1.75; color: #1f1f1f; max-width: 760px; }
.article-body h2 { font-family: var(--font-serif); font-size: 26px; margin: 32px 0 12px; padding-top: 8px; }
.article-body h3 { font-family: var(--font-serif); font-size: 21px; margin: 24px 0 10px; }
.article-body p { margin: 0 0 16px; }
.article-body ul, .article-body ol { padding-left: 26px; margin: 0 0 18px; }
.article-body li { margin-bottom: 8px; }
.article-body a { color: var(--c-accent); }
.article-body img { border-radius: var(--radius); margin: 18px 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-family: var(--font-sans); font-size: 15px; background: #fff; }
.article-body th, .article-body td { border: 1px solid var(--c-border); padding: 10px 12px; text-align: left; vertical-align: top; }
.article-body th { background: var(--c-tag-bg); font-weight: 600; }
.article-body blockquote { border-left: 4px solid var(--c-accent); margin: 18px 0; padding: 8px 18px; background: #fff; color: #2a2a2a; }
.article-body code { background: var(--c-tag-bg); padding: 2px 6px; border-radius: 4px; font-size: 0.92em; }

.article-tags { margin-top: 32px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag { background: var(--c-tag-bg); color: var(--c-secondary); padding: 5px 12px; border-radius: 999px; font-size: 13px; font-family: var(--font-sans); }

.not-found { text-align: center; padding: 80px 20px; }
.not-found h1 { font-family: var(--font-serif); font-size: 32px; }

.site-footer { background: #1a1a1a; color: #d6d6d6; margin-top: 48px; padding: 36px 0 20px; font-size: 14px; }
.footer-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 22px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 14px; text-transform: uppercase; letter-spacing: 0.05em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: #d6d6d6; }
.site-footer a:hover { color: #fff; }
.site-footer p { color: #999; margin: 0; }
.footer-bottom { border-top: 1px solid #333; padding-top: 16px; color: #888; font-size: 12px; }
/* Mobile nav (hamburger) */
.nav-toggle { display: none; }
.nav-toggle-btn { display: none; }
.nav-backdrop { display: none; }

@media (max-width: 860px) {
  .header-row { gap: 12px; position: relative; }
  .nav-toggle-btn {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    margin-left: auto;
    padding: 10px;
    border-radius: var(--radius);
    cursor: pointer;
    background: transparent;
    border: 1px solid var(--c-border);
    box-sizing: border-box;
  }
  .nav-toggle-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(78vw, 320px);
    background: #fff;
    border-left: 1px solid var(--c-border);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.08);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 60;
    overflow-y: auto;
    padding: 64px 16px 24px;
  }
  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .primary-nav a {
    display: block;
    padding: 12px 14px;
    font-size: 16px;
    border-radius: var(--radius);
  }
  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 55;
  }
  .nav-toggle:checked ~ .primary-nav { transform: translateX(0); }
  .nav-toggle:checked ~ .nav-backdrop { opacity: 1; pointer-events: auto; }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-toggle-btn span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 720px) {
  .footer-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .article-header h1 { font-size: 28px; }
}