:root {
  color-scheme: light dark;
  --bg: #fff;
  --surface: #ffffff;
  --surface-muted: #f0f0f0;
  --text: #1b1b1b;
  --muted: #5a5a5a;
  --accent: #d0402e;
  --accent-strong: #e0503e;
  --border: #e2d9d0;
  --shadow: 0 0 12px rgba(15, 20, 30, 0.08);
  --radius: 16px;
  --radius-subtle: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --surface: #1e1e1e;
    --surface-muted: #2a2a2a;
    --text: #e0e0e0;
    --muted: #a0a0a0;
    --accent: #ff6f61;
    --accent-strong: #ff7f71;
    --border: #333333;
    --shadow: 0 0 12px rgba(0, 0, 0, 0.6);
  }
}

body {
  margin: 0;
  font-family: sans-serif;
  color: var(--text);
  line-height: 1.5;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  line-height: 1.2;
}

.article-title {
  font-size: 1.75rem;
}

h1 {
  font-size: 1.5rem;
}
h2 {
  font-size: 1.25rem;
}
h3,
h4,
h5,
h6 {
  font-size: 1rem;
}

p {
  margin: 0 0 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.content {
  flex: 1;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border);
  z-index: 10;
  background: var(--bg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.logo {
  height: 36px;
  content: url("/logo.png");
}

@media (prefers-color-scheme: dark) {
  .logo {
    content: url("/logo-dark.png");
  }
}

.brand-name {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 16px;
}

.nav-link {
  font-weight: 500;
  color: var(--muted);
}

.nav-link:hover {
  color: var(--text);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 480px;
}

.hero-card {
  background: var(--surface);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.hero-card li {
  margin-bottom: 8px;
}

.section {
  padding: 48px 0 72px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.category-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px;
  border: 1px solid var(--border);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.category-card p {
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
}

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

.article-card {
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.article-card p {
  color: var(--muted);
}

.article h1 {
  margin-top: 10px;
}

.article-lede {
  font-size: 1.05rem;
  color: var(--muted);
}

.article-content {
  margin-top: 24px;
}

.article-content p {
  margin-bottom: 18px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

.breadcrumb-sep {
  margin: 0 6px;
}

.not-found {
  text-align: center;
  background: var(--surface);
  padding: 48px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 10px 18px;
  border-radius: var(--radius-subtle);
  font-weight: 600;
}

.button:hover {
  background: var(--accent-strong);
  color: white;
}

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  gap: 6px;
  text-align: center;
  color: var(--muted);
}

.main {
  padding-top: 12px;
}

.hero {
  padding-top: 24px;
}

@media (max-width: 600px) {
  .header-inner {
    padding: 12px 12px;
  }

  .hero-card {
    padding: 18px;
  }

  .category-card {
    padding: 18px;
  }

  .section {
    padding: 12px 0 12px;
  }
}