:root {
  --bg: #0b0c0f;
  --panel: #12141a;
  --text: #e8ebf0;
  --muted: #a7b0c0;
  --brand: #67e8f9;
  --link: #7dd3fc;
  --border: #222631;
  --shadow: 0 10px 30px rgba(0, 0, 0, .3);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --panel: #fff;
    --text: #101316;
    --muted: #4a5568;
    --brand: #0369a1;
    --link: #0ea5e9;
    --border: #e5e7eb;
    --shadow: 0 6px 18px rgba(0, 0, 0, .08);
  }
}

* {
  box-sizing: border-box
}

html,
body {
  height: 100%
}

body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, 'Helvetica Neue', Arial, 'Noto Sans';
  background: var(--bg);
  color: var(--text)
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0 .75rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, .02), rgba(0, 0, 0, 0))
}

.title {
  font-size: clamp(1.2rem, 3.2vw, 1.8rem);
  margin: 0
}

.subtitle {
  color: var(--muted);
  text-align: center;
  margin: .5rem 0 0
}

.top-actions .btn {
  display: inline-block;
  padding: .6rem .9rem;
  border-radius: .7rem;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow)
}

.top-actions .btn:hover {
  border-color: var(--link)
}

.controls {
  display: grid;
  gap: .8rem;
  padding: 1.25rem 0
}

.search-label {
  font-weight: 600
}

.search {
  width: 100%;
  padding: .8rem 1rem;
  border-radius: .8rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  outline: none
}

.search:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(103, 232, 249, .15)
}

.counts {
  color: var(--muted);
  font-size: .95rem
}

.alphabet {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .5rem;
  padding-top: .2rem
}

.alphabet a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: .6rem;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: var(--panel)
}

.alphabet a:hover {
  border-color: var(--link)
}

.alphabet a.active {
  outline: 2px solid var(--brand)
}

.content {
  display: grid;
  gap: 1.2rem;
  padding-bottom: 3rem
}

.group {
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: .6rem .8rem .2rem
}

.group>h2 {
  margin: .2rem .2rem .5rem;
  font-size: 1.1rem;
  letter-spacing: .04em;
  color: var(--muted)
}

.term {
  padding: .8rem;
  border-radius: .7rem;
  border: 1px solid transparent
}

.term:hover {
  border-color: var(--border);
  background: rgba(127, 127, 127, .05)
}

.term .head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: .6rem
}

.term .t {
  font-weight: 650;
  font-size: 1.06rem;
  margin: 0 0 .3rem
}

.term .meta {
  color: var(--muted);
  font-size: .92rem;
  margin-top: .2rem
}

.term .body {
  margin: 0
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: .1rem .5rem;
  border: 1px solid var(--border);
  border-radius: .5rem;
  font-size: .8rem;
  color: var(--muted);
  margin-right: .35rem
}

.actions {
  display: inline-flex;
  gap: .4rem
}

.icon-btn {
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .3rem .5rem;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  cursor: pointer
}

.icon-btn:hover {
  border-color: var(--link)
}

.loading {
  color: var(--muted);
  padding: 1.2rem
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0 2rem;
  color: var(--muted);
  font-size: .95rem
}

a {
  color: var(--link)
}

mark {
  background: rgba(103, 232, 249, .25);
  padding: 0 .1em;
  border-radius: .25em
}