:root {
  --paper: #ece6d6;
  --paper-deep: #e2dac5;
  --ink: #221f1a;
  --ink-soft: #4a4438;
  --muted: #6b6455;
  --card: #fffcf5;
  --card-border: #d9d0b8;
  --stamp: #2b6f76;
  --stamp-deep: #1e4f54;

  --cat-frontend: #3e6fbf;
  --cat-backend: #4f7942;
  --cat-devops: #9c5a2e;
  --cat-design: #8b5a9e;
  --cat-pm: #b98a2e;
  --cat-general: #6b6455;

  --font-display: 'Lora', serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  max-width: 100%;
  overflow-x: hidden;
}

/* -------------------- Header -------------------- */

.site-header {
  background: var(--paper-deep);
  border-bottom: 1px solid var(--card-border);
  padding: 48px 24px 28px;
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--stamp-deep);
  text-transform: uppercase;
}

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  margin: 0 0 12px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0 0 28px;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* Search styled like a catalog drawer label */

.search-row {
  display: flex;
  align-items: stretch;
  max-width: 560px;
  margin-bottom: 22px;
  border: 1.5px solid var(--ink);
  background: var(--card);
}

.search-tab {
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--card);
  background: var(--stamp);
  white-space: nowrap;
}

#search {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
}

#search::placeholder {
  color: #a39c8a;
}

.search-count {
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  border-left: 1px solid var(--card-border);
  white-space: nowrap;
}

/* Category tabs, like folder tabs */

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-tab {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  padding: 7px 14px 8px;
  border: 1.5px solid var(--ink);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  border-radius: 3px 3px 0 0;
  transition: transform 0.12s ease, background 0.12s ease, color 0.12s ease;
}

.cat-tab:hover {
  transform: translateY(-2px);
}

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

.cat-tab .tab-count {
  opacity: 0.6;
  margin-left: 6px;
}

/* -------------------- Main / cards -------------------- */

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 24px 80px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.term-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-left: none;
  padding: 20px 20px 18px 30px;
  box-shadow: 2px 2px 0 rgba(34, 31, 26, 0.05);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.term-card:hover {
  box-shadow: 4px 4px 0 rgba(34, 31, 26, 0.09);
  transform: translateY(-2px);
}

/* signature element: rotated category tab hugging the left edge, like a library catalog card */
.term-card::before {
  content: attr(data-abbr);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 22px;
  background: var(--cat-color, var(--ink));
  color: #fff9ec;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.term-card[data-category="frontend"] { --cat-color: var(--cat-frontend); }
.term-card[data-category="backend"]  { --cat-color: var(--cat-backend); }
.term-card[data-category="devops"]   { --cat-color: var(--cat-devops); }
.term-card[data-category="design"]   { --cat-color: var(--cat-design); }
.term-card[data-category="pm"]       { --cat-color: var(--cat-pm); }
.term-card[data-category="general"]  { --cat-color: var(--cat-general); }

.term-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.term-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  color: var(--ink);
}

.term-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #b7ad95;
  white-space: nowrap;
}

.term-aliases {
  font-size: 12.5px;
  font-style: italic;
  color: var(--muted);
  margin: 0 0 10px;
}

.term-definition {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.term-simple {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.term-simple-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--stamp-deep);
}

.term-example {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
  background: var(--paper);
  border-left: 2.5px solid var(--cat-color, var(--stamp));
  padding: 8px 10px;
  margin: 0;
}

.term-example::before {
  content: "› ";
  font-family: var(--font-mono);
  color: var(--cat-color, var(--stamp));
  font-weight: 600;
}

mark {
  background: #f4d896;
  color: var(--ink);
  padding: 0 1px;
  border-radius: 2px;
}

.noscript-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 24px 60px;
}

.noscript-content h2 {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 32px 0 12px;
  color: var(--ink);
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 8px;
}

.noscript-content dt {
  font-family: var(--font-mono);
  font-weight: 600;
  margin-top: 14px;
  color: var(--ink);
}

.noscript-content dd {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.5;
}

.pagination-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.page-btn {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  border-radius: 3px;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.page-btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.page-btn-outline {
  background: var(--card);
  color: var(--ink);
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  font-size: 15px;
}

/* -------------------- Footer -------------------- */

.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 22px 24px 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.site-footer p {
  max-width: 640px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--muted);
}

.footer-download a {
  color: var(--stamp-deep);
  font-weight: 600;
}

.footer-contact a {
  color: var(--stamp-deep);
  font-weight: 600;
}

.site-footer code {
  font-family: var(--font-mono);
  background: var(--paper-deep);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--ink-soft);
}

/* -------------------- Responsive -------------------- */

@media (max-width: 620px) {
  .site-header { padding: 34px 16px 22px; }
  main { padding: 26px 16px 60px; }
  .card-grid { grid-template-columns: 1fr; }
  .search-row { flex-wrap: wrap; }
  .search-count { border-left: none; border-top: 1px solid var(--card-border); width: 100%; }
}

/* -------------------- Reduced motion -------------------- */

@media (prefers-reduced-motion: reduce) {
  .term-card, .cat-tab { transition: none; }
}

/* -------------------- Focus visibility -------------------- */

#search:focus-visible,
.cat-tab:focus-visible {
  outline: 2px solid var(--stamp);
  outline-offset: 2px;
}