:root {
  --paper: #f1ecde;
  --card: #fffdf8;
  --ink: #22293a;
  --ink-soft: #5b5f70;
  --brass: #9c7a3c;
  --brass-deep: #7c5f2c;
  --moss: #4b6350;
  --line: #ded4b8;
  --rust: #8b3a3a;
  --radius: 3px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans TC', 'Inter', sans-serif;
  line-height: 1.6;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.site-header {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.site-header h1 {
  font-family: 'Noto Serif TC', serif;
  font-weight: 700;
  font-size: 2rem;
  margin: 0 0 6px;
  letter-spacing: 0.01em;
}

.site-header p {
  margin: 0;
  color: var(--ink-soft);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
}

.controls {
  position: sticky;
  top: 0;
  background: var(--paper);
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
  z-index: 10;
}

#search {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: 'Noto Sans TC', 'Inter', sans-serif;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  margin-bottom: 12px;
}

#search:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.filter-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 6px;
}

.tab {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-soft);
  cursor: pointer;
}

.tab:hover {
  border-color: var(--brass);
  color: var(--brass-deep);
}

.tab.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.tab:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

#count {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px 16px;
  text-decoration: none;
  color: inherit;
}

@media (prefers-reduced-motion: no-preference) {
  .card {
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  }
  .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(34, 41, 58, 0.1);
    border-color: var(--brass);
  }
}

.card-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--brass-deep);
  margin-bottom: 8px;
}

.card-title {
  font-family: 'Noto Serif TC', serif;
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--ink);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.card-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--brass-deep);
  border: 1px solid var(--brass);
  border-radius: 999px;
  padding: 2px 9px;
}

.card-tag-type {
  color: var(--moss);
  border-color: var(--moss);
}

.card-snippet {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.empty {
  display: none;
  text-align: center;
  color: var(--ink-soft);
  padding: 60px 20px;
  font-style: italic;
}

.back-to-top {
  display: block;
  text-align: center;
  margin-top: 40px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.back-to-top:hover {
  color: var(--brass-deep);
}