*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-accent: #2d2d2d;
  --color-border: #e5e5e5;
  --color-overlay: rgba(0, 0, 0, 0.6);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
  --radius: 6px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --transition: 200ms ease;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

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

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.navbar-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.navbar-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-text);
}

.navbar-search-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.navbar-search-btn:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.navbar-search-btn kbd {
  font-size: 0.7rem;
  padding: 2px 5px;
  background: var(--color-border);
  border-radius: 3px;
}

.footer {
  padding: 48px 32px 32px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  margin-top: 80px;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
}

.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.filter-chip:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.filter-chip.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.category-section {
  margin-bottom: 56px;
}

.category-section:last-child {
  margin-bottom: 0;
}

.category-section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.category-section-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.category-section-count {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

@media (max-width: 768px) {
  .navbar {
    padding: 12px 16px;
  }
  .navbar-links {
    gap: 12px;
  }
  .filter-bar {
    gap: 8px;
  }
  .filter-chip {
    padding: 6px 16px;
    font-size: 0.75rem;
  }
}