/* ==========================================================
   NLP Lab — design system
   ========================================================== */
:root {
  --bg: #0b0d12;
  --bg-2: #11141b;
  --bg-3: #161a23;
  --panel: #141823;
  --line: #232938;
  --text: #e6e9f0;
  --muted: #8a93a6;
  --accent: #7c5cff;
  --accent-2: #00d4ff;
  --good: #28d17c;
  --warn: #ffb347;
  --bad: #ff5d6c;
  --shadow: 0 12px 40px rgba(0,0,0,.4);
  --r: 14px;
}
[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-2: #ffffff;
  --bg-3: #eef0f6;
  --panel: #ffffff;
  --line: #e3e6ef;
  --text: #14171f;
  --muted: #5b6477;
  --shadow: 0 8px 28px rgba(20,30,60,.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
}
code, .mono { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: .92em; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 248px;
  flex-shrink: 0;
  background: var(--bg-2);
  border-right: 1px solid var(--line);
  padding: 22px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 26px; padding-left: 4px;}
.logo {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  box-shadow: var(--shadow);
}
.logo span { opacity: .75; }
.brand-title { font-weight: 700; font-size: 15px; }
.brand-sub { font-size: 11.5px; color: var(--muted); letter-spacing: .04em; text-transform: uppercase;}

nav { display: flex; flex-direction: column; gap: 2px; }
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  padding: 8px 12px;
  border-radius: 8px;
  display: flex; align-items: center; gap: 10px;
  transition: all .15s;
  font-weight: 500;
}
nav a:hover { background: var(--bg-3); color: var(--text); }
nav a.active {
  background: linear-gradient(90deg, rgba(124,92,255,.18), transparent);
  color: var(--text);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}
.nav-ico { opacity: .55; width: 16px; text-align: center; }

.theme-toggle {
  margin-top: auto;
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--line);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12.5px;
}

/* ---------- Content ---------- */
.content { flex: 1; padding: 48px 56px; max-width: 1200px; }
.panel { margin-bottom: 90px; scroll-margin-top: 20px; }
.phead { margin-bottom: 28px; }
.kicker { font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 6px;}
h1 { font-size: 56px; font-weight: 800; letter-spacing: -0.03em; line-height: 1.05; margin: 0 0 18px; }
h2 { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; }
h3 { font-size: 18px; font-weight: 600; margin: 4px 0 6px; }
h4 { font-size: 13.5px; font-weight: 600; margin: 0 0 10px; color: var(--text); letter-spacing: .01em;}
.lead { color: var(--muted); font-size: 15.5px; max-width: 720px; }
.grad {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Hero ---------- */
.hero { padding: 32px 0 48px; }
.hero-eyebrow {
  display: inline-block;
  font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent);
  background: rgba(124,92,255,.1);
  padding: 6px 12px; border-radius: 999px;
  margin-bottom: 24px; font-weight: 600;
}
.hero-stats { display: flex; gap: 40px; margin-top: 32px; }
.stat .num { font-size: 38px; font-weight: 800; letter-spacing: -0.02em; }
.stat .lbl { color: var(--muted); font-size: 12.5px; letter-spacing: .04em; text-transform: uppercase;}

/* ---------- Grid + Cards ---------- */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card, .card-link {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 18px;
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform .18s, border-color .18s;
}
.card-link:hover { transform: translateY(-3px); border-color: var(--accent); }
.card-link .micro { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 4px; }
.card-link p { color: var(--muted); margin: 4px 0 0; font-size: 13.5px;}

/* ---------- Pipeline ---------- */
.pipe { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 22px;}
.pipe-step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 16px 18px;
  cursor: pointer;
  min-width: 130px;
  text-align: center;
  transition: all .18s;
}
.pipe-step:hover { border-color: var(--accent); transform: translateY(-2px); }
.pipe-step.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; border-color: transparent;}
.pipe-step.active .pn { background: rgba(255,255,255,.25); }
.pn { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; background: var(--bg-3); font-size: 12px; font-weight: 700; margin-bottom: 8px;}
.pl { font-size: 13px; font-weight: 600; line-height: 1.3;}
.pipe-arr { color: var(--muted); font-size: 18px; }
.pipe-detail { background: var(--panel); border:1px solid var(--line); border-radius: var(--r); padding: 22px; min-height: 90px;}

/* ---------- Timeline ---------- */
.tl { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-bottom: 22px;}
.tl-era {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r); padding: 14px; cursor: pointer;
  transition: all .18s; position: relative;
}
.tl-era:hover, .tl-era.active { border-color: var(--accent); transform: translateY(-2px); }
.tl-era.active { background: linear-gradient(135deg, rgba(124,92,255,.18), rgba(0,212,255,.05)); }
.tl-year { font-size: 11.5px; color: var(--accent); font-weight: 600;}
.tl-name { font-weight: 600; font-size: 14px; margin-top: 4px;}
.tl-detail { background: var(--panel); border:1px solid var(--line); border-radius: var(--r); padding: 22px; min-height: 120px;}
.tl-detail h3 { color: var(--accent); }
.tl-list { list-style: none; padding: 0; margin: 12px 0 0; }
.tl-list li { padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px;}
.tl-list li:first-child { border-top: 0; }
.tl-list b { color: var(--accent-2); margin-right: 6px;}

/* ---------- Form elements ---------- */
.textbox, input[type=text], input:not([type]) {
  width: 100%;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  font-family: inherit;
  resize: vertical;
  outline: none;
  transition: border-color .15s;
}
.textbox:focus, input:focus { border-color: var(--accent); }
button {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 14px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  font-weight: 500;
  transition: all .15s;
}
button:hover { border-color: var(--accent); }
button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white; border-color: transparent;
}
button.primary:hover { filter: brightness(1.1); }
button.ghost { background: transparent; }
button.mini { padding: 4px 10px; font-size: 12px; }

.toggles { display: flex; flex-wrap: wrap; gap: 14px; margin: 14px 0 18px;}
.toggles label { font-size: 13px; color: var(--muted); cursor: pointer; user-select: none;}
.toggles input { margin-right: 4px;}

select {
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 12px; font-family: inherit; font-size: 13px;
  width: 100%; margin-top: 4px;
}

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; min-height: 32px;}
.chip {
  background: var(--bg-3); border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 6px;
  font-size: 12.5px; font-family: 'JetBrains Mono', monospace;
}
.chip.token { background: rgba(124,92,255,.12); border-color: rgba(124,92,255,.3); }
.chip.stop { opacity: .35; text-decoration: line-through;}
.chip.stem { background: rgba(0,212,255,.1); border-color: rgba(0,212,255,.3);}
.chip.lemma { background: rgba(40,209,124,.1); border-color: rgba(40,209,124,.3);}
.chip.pos-DET { background: rgba(255,179,71,.12); border-color: rgba(255,179,71,.35);}
.chip.pos-NOUN { background: rgba(124,92,255,.12); border-color: rgba(124,92,255,.35);}
.chip.pos-VERB { background: rgba(0,212,255,.1); border-color: rgba(0,212,255,.35);}
.chip.pos-ADJ { background: rgba(40,209,124,.1); border-color: rgba(40,209,124,.35);}
.chip-tag { font-size: 10px; color: var(--muted); margin-left: 5px;}

.pill {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  background: rgba(124,92,255,.18); color: var(--accent);
  font-weight: 600; font-size: 12.5px;
}

.note {
  margin-top: 18px; padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: rgba(124,92,255,.05);
  border-radius: 0 8px 8px 0;
  font-size: 13.5px; color: var(--muted);
}
.note b { color: var(--text); }
.note code { color: var(--accent-2); background: var(--bg-3); padding: 1px 5px; border-radius: 4px;}

/* ---------- Regex ---------- */
.rx-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-bottom: 14px;}
.rx-pat { display: flex; align-items: center; gap: 4px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 8px; padding: 4px 8px; flex: 1; min-width: 280px;}
.rx-d { color: var(--accent); font-family: 'JetBrains Mono', monospace; font-size: 14px; }
.rx-pat input { border: 0; background: transparent; font-family: 'JetBrains Mono', monospace; padding: 6px; font-size: 14px;}
.rx-pat input:focus { box-shadow: none; }
.rx-presets { display: flex; flex-wrap: wrap; gap: 6px; }
.rx-presets button { padding: 5px 10px; font-size: 12px; }
.rx-out { background: var(--bg-2); border:1px solid var(--line); border-radius: 10px; padding: 16px; min-height: 100px; white-space: pre-wrap; font-family: 'JetBrains Mono', monospace; font-size: 13px; line-height: 1.7; margin-top: 12px;}
.rx-hit { background: linear-gradient(180deg, transparent 55%, rgba(255,179,71,.5) 55%); color: var(--text); padding: 1px 1px; border-radius: 2px;}
.rx-list { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.rx-list .chip { background: rgba(255,179,71,.12); border-color: rgba(255,179,71,.3);}

/* ---------- TFIDF ---------- */
.tf-doc { display: flex; gap: 8px; margin-bottom: 8px; align-items: flex-start;}
.tf-doc input { flex: 1; }
.tf-doc button { padding: 8px 10px; }
.tf-result {
  background: var(--panel); border: 1px solid var(--line);
  padding: 10px 14px; border-radius: 10px; margin-bottom: 8px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.tf-result .doc-snip { font-size: 13px; }
.tf-result .doc-id { font-size: 11px; color: var(--muted); margin-bottom: 2px;}
.tf-score { font-weight: 700; color: var(--accent-2); font-family: 'JetBrains Mono', monospace;}
.matrix { overflow-x: auto; }
.matrix table { border-collapse: collapse; font-size: 12px; font-family: 'JetBrains Mono', monospace; }
.matrix th, .matrix td { padding: 6px 10px; text-align: right; border-bottom: 1px solid var(--line);}
.matrix th { color: var(--muted); font-weight: 500; text-align: left;}
.matrix .term { text-align: left; color: var(--accent); }
.matrix td.hot { background: rgba(0,212,255,.12); color: var(--accent-2);}

/* ---------- Naive Bayes ---------- */
.nb-row { display: flex; gap: 8px; margin-bottom: 6px; align-items: center;}
.nb-row input[type=text] { flex: 1; }
.nb-row select { width: 110px; }
.nb-row button { padding: 6px 10px;}
.big-pred {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px; text-align: center;
  font-size: 18px; font-weight: 600; min-height: 26px;
}
.big-pred .lab { font-size: 24px; font-weight: 800; display: block; margin-bottom: 4px;}
.big-pred .lab.spam { color: var(--bad); }
.big-pred .lab.ham { color: var(--good); }
.math { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px; font-family: 'JetBrains Mono', monospace; font-size: 12px; line-height: 1.8;}
.math .pos { color: var(--good); }
.math .neg { color: var(--bad); }

/* ---------- Logistic ---------- */
.lr-grid { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: start;}
.lr-grid canvas { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); cursor: crosshair;}
.canvas-hint { color: var(--muted); font-size: 11.5px; margin-top: 6px;}
.slider { margin-bottom: 14px; }
.slider label { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--muted); margin-bottom: 4px;}
.slider label span { color: var(--accent-2); font-family: 'JetBrains Mono', monospace;}
.slider input[type=range] { width: 100%; accent-color: var(--accent);}
.stat-row { display: flex; gap: 14px; margin-top: 16px;}
.stat-row > div { flex: 1; background: var(--bg-2); border: 1px solid var(--line); border-radius: 8px; padding: 10px;}
.stat-row .k { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em;}
.stat-row .v { font-size: 18px; font-weight: 700; color: var(--accent-2); font-family: 'JetBrains Mono', monospace;}

/* ---------- Sentiment ---------- */
.se-meter { background: var(--bg-2); border: 1px solid var(--line); border-radius: 999px; height: 14px; overflow: hidden; position: relative; margin-top: 14px;}
.se-meter::before { content:""; position: absolute; left: 50%; top: 0; width: 1px; height: 100%; background: var(--muted); opacity: .3;}
#seBar { height: 100%; background: linear-gradient(90deg, var(--bad), var(--warn), var(--good)); transition: width .3s, margin-left .3s; width: 0%;}
.se-score { text-align: center; font-size: 32px; font-weight: 800; margin: 14px 0; font-family: 'JetBrains Mono', monospace;}
.se-score.pos { color: var(--good); }
.se-score.neg { color: var(--bad); }
.se-score.neu { color: var(--muted); }
.chip.se-pos { background: rgba(40,209,124,.16); border-color: rgba(40,209,124,.4);}
.chip.se-neg { background: rgba(255,93,108,.16); border-color: rgba(255,93,108,.4);}
.chip.se-neu { background: var(--bg-3); opacity: .7;}
.chip.se-boost { background: rgba(255,179,71,.14); border-color: rgba(255,179,71,.4); font-style: italic;}
.chip.se-neg-flip { background: rgba(124,92,255,.14); border-color: rgba(124,92,255,.4); text-decoration: line-through; text-decoration-color: var(--accent);}

/* ---------- Embeddings ---------- */
.emb-grid { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: start;}
.emb-grid canvas { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r); cursor: crosshair;}
.anal { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.anal input { width: 90px; font-family: 'JetBrains Mono', monospace; text-align: center;}
.anal span { color: var(--muted); font-weight: 700;}
.ana-out { margin-top: 12px; padding: 14px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; min-height: 50px;}
.nn-row { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-bottom: 1px solid var(--line); font-size: 13px; font-family: 'JetBrains Mono', monospace;}
.nn-row:last-child { border-bottom: 0; }
.nn-sim { margin-left: auto; color: var(--accent-2);}
.nn-bar { height: 6px; flex: 1; max-width: 100px; background: var(--bg-3); border-radius: 3px; overflow: hidden;}
.nn-bar > div { height: 100%; background: var(--accent); }

/* ---------- POS Trellis ---------- */
.trellis { overflow-x: auto; }
.trellis table { border-collapse: collapse; }
.trellis td, .trellis th { padding: 8px 12px; font-family: 'JetBrains Mono', monospace; font-size: 12px; border: 1px solid var(--line); text-align: center;}
.trellis th { background: var(--bg-3); color: var(--muted); font-weight: 600;}
.trellis td.path { background: rgba(40,209,124,.16); color: var(--good); font-weight: 700; border-color: var(--good);}
.trellis .tag { color: var(--accent); font-weight: 700; text-align: left;}

/* ---------- NER ---------- */
.ner-out { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 18px; line-height: 2.2; font-size: 14.5px;}
.ner-ent {
  padding: 2px 7px 2px 5px; border-radius: 6px;
  font-weight: 500; position: relative; margin: 0 2px;
}
.ner-ent::after {
  content: attr(data-type);
  font-size: 9px;
  font-weight: 700;
  margin-left: 5px;
  padding: 1px 4px;
  border-radius: 3px;
  background: rgba(0,0,0,.3);
  vertical-align: middle;
  letter-spacing: .04em;
}
.ner-PERSON { background: rgba(124,92,255,.2); border-bottom: 2px solid var(--accent);}
.ner-LOC { background: rgba(0,212,255,.18); border-bottom: 2px solid var(--accent-2);}
.ner-ORG { background: rgba(40,209,124,.18); border-bottom: 2px solid var(--good);}
.ner-DATE { background: rgba(255,179,71,.18); border-bottom: 2px solid var(--warn);}
.ner-MONEY { background: rgba(255,93,108,.18); border-bottom: 2px solid var(--bad);}

/* ---------- NN canvas ---------- */
#nnCanvas { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--r);}

/* ---------- RNN ---------- */
.rnn-ctrl { display: flex; gap: 8px; margin: 12px 0 18px; }
.rnn-steps { display: flex; gap: 14px; overflow-x: auto; padding-bottom: 10px;}
.rnn-step {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; min-width: 130px;
  flex-shrink: 0;
}
.rnn-step .rstep { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em;}
.rnn-step .rtok { font-size: 17px; font-weight: 700; margin: 4px 0 10px; font-family: 'JetBrains Mono', monospace; color: var(--accent);}
.rnn-bar { display: flex; flex-direction: column; gap: 3px; }
.rnn-bar .hb { display: flex; align-items: center; gap: 6px; font-size: 10.5px; color: var(--muted); font-family: 'JetBrains Mono', monospace;}
.rnn-bar .hb-bar { flex: 1; height: 6px; background: var(--bg-3); border-radius: 3px; overflow: hidden;}
.rnn-bar .hb-bar > div { height: 100%; transition: width .3s; }
.rnn-bar .hb-pos > div { background: var(--good);}
.rnn-bar .hb-neg > div { background: var(--bad); margin-left: auto;}

/* ---------- Transformer ---------- */
#atHeat { display: grid; gap: 2px; font-family: 'JetBrains Mono', monospace; font-size: 11px; }
.at-row { display: grid; gap: 2px; align-items: center; }
.at-lab { padding-right: 8px; text-align: right; color: var(--muted); font-size: 11.5px;}
.at-cell { aspect-ratio: 1; min-height: 28px; border-radius: 3px; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.85); font-size: 10px; font-weight: 600; cursor: pointer; transition: transform .12s;}
.at-cell:hover { transform: scale(1.12); outline: 2px solid var(--text); z-index: 2;}
.at-colhead { text-align: center; color: var(--muted); font-size: 10px; padding-bottom: 4px;}
.qkv { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px; font-family: 'JetBrains Mono', monospace; font-size: 11.5px; line-height: 1.7; max-height: 280px; overflow: auto;}
.qkv .lbl { color: var(--accent); font-weight: 700; }
.tf-block { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.tf-box { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 18px; text-align: center; font-size: 13px; min-width: 240px;}
.tf-box.hot { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; border-color: transparent; font-weight: 600;}
.tf-arr { color: var(--muted); }

/* ---------- Challenges ---------- */
#chTiles .card {
  cursor: pointer;
  transition: all .18s;
}
#chTiles .card:hover { border-color: var(--accent); transform: translateY(-3px);}
#chTiles .card.open { background: linear-gradient(135deg, rgba(124,92,255,.1), rgba(0,212,255,.04)); border-color: var(--accent);}
#chTiles .ch-ico { font-size: 24px; margin-bottom: 8px; opacity: .8;}
#chTiles .ch-body { display: none; margin-top: 12px; font-size: 13.5px; color: var(--muted); }
#chTiles .card.open .ch-body { display: block; }

/* ---------- BPE ---------- */
#bpeMerges .chip { background: rgba(0,212,255,.1); border-color: rgba(0,212,255,.3); }
#bpeVocab .chip { font-family: 'JetBrains Mono', monospace; }
#bpeTokens .chip { background: rgba(124,92,255,.12); border-color: rgba(124,92,255,.3); font-family: 'JetBrains Mono', monospace;}
#bpeTokens .chip.unk { background: rgba(255,93,108,.15); border-color: rgba(255,93,108,.35);}
.bpe-sep { color: var(--muted); margin: 0 4px;}

/* ---------- N-gram ---------- */
.ng-row { display: flex; align-items: center; gap: 8px; margin: 14px 0 6px; flex-wrap: wrap; }
.ng-row select { width: auto; }
.ng-row input { width: auto; flex: 0 1 200px;}
.ng-out { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 16px; font-size: 15px; line-height: 1.8; min-height: 40px;}
.ng-out .seed { color: var(--accent); font-weight: 600; }
.ng-out .gen { color: var(--accent-2); }
.ng-dist { display: flex; flex-direction: column; gap: 4px; max-width: 500px;}
.ng-dist .ng-bar { display: flex; align-items: center; gap: 10px; font-family: 'JetBrains Mono', monospace; font-size: 12px;}
.ng-dist .ng-bar .w { width: 100px; }
.ng-dist .ng-bar .b { flex: 1; height: 10px; background: var(--bg-3); border-radius: 4px; overflow: hidden;}
.ng-dist .ng-bar .b > div { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2));}
.ng-dist .ng-bar .p { width: 60px; text-align: right; color: var(--accent-2);}

/* ---------- Edit distance ---------- */
.ed-row { display: flex; gap: 18px; flex-wrap: wrap;}
.ed-row label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 8px;}
.ed-row input { width: 180px; font-family: 'JetBrains Mono', monospace;}
.ed-grid { overflow-x: auto; }
.ed-grid table { border-collapse: collapse; font-family: 'JetBrains Mono', monospace; font-size: 13px; }
.ed-grid td, .ed-grid th { width: 36px; height: 36px; text-align: center; border: 1px solid var(--line);}
.ed-grid th { background: var(--bg-3); color: var(--accent); font-weight: 700;}
.ed-grid td.path { background: rgba(40,209,124,.16); border-color: var(--good);}
.ed-grid td.start { background: rgba(124,92,255,.18); border-color: var(--accent);}
.ed-grid td.end { background: rgba(0,212,255,.18); border-color: var(--accent-2); font-weight: 700;}
.chip.op-ins { background: rgba(0,212,255,.14); border-color: rgba(0,212,255,.4);}
.chip.op-del { background: rgba(40,209,124,.14); border-color: rgba(40,209,124,.4);}
.chip.op-sub { background: rgba(255,93,108,.14); border-color: rgba(255,93,108,.4);}
.chip.op-match { background: var(--bg-3); opacity: .7;}

/* ---------- LDA ---------- */
.lda-topic { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px;}
.lda-topic h4 { color: var(--accent); margin-bottom: 8px;}
.lda-topic .lda-w { display: flex; align-items: center; gap: 8px; font-size: 12px; font-family: 'JetBrains Mono', monospace; padding: 3px 0;}
.lda-topic .lda-w .term { min-width: 80px;}
.lda-topic .lda-w .bar { flex: 1; height: 6px; background: var(--bg-3); border-radius: 3px; overflow: hidden;}
.lda-topic .lda-w .bar > div { height: 100%; background: var(--accent);}
.lda-topic .lda-w .pct { width: 40px; text-align: right; color: var(--accent-2);}
.lda-doc { background: var(--panel); border:1px solid var(--line); border-radius: 10px; padding: 10px 14px; margin-bottom: 6px; display: flex; gap: 14px; align-items: center;}
.lda-doc .ld-txt { flex: 1; font-size: 13px;}
.lda-doc .ld-mix { display: flex; gap: 4px; min-width: 160px;}
.lda-doc .ld-mix .seg { height: 18px; border-radius: 3px;}

/* ---------- Beam Search ---------- */
.beam-tree {
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  overflow-x: auto; line-height: 1.7;
}
.beam-node { display: inline-block; padding: 2px 8px; border-radius: 5px; background: var(--bg-3); border: 1px solid var(--line); margin: 2px;}
.beam-node.kept { background: rgba(40,209,124,.16); border-color: var(--good); color: var(--good);}
.beam-node.pruned { opacity: .4; text-decoration: line-through;}
.beam-node.final { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; border-color: transparent; font-weight: 700;}
.beam-step { margin: 8px 0; padding-left: 8px; border-left: 2px solid var(--line);}
.beam-step .sl { color: var(--muted); font-size: 11px; margin-bottom: 4px;}
.beam-list { display: flex; flex-direction: column; gap: 6px;}
.beam-row { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; display: flex; gap: 12px; align-items: center;}
.beam-row .seq { flex: 1; font-family: 'JetBrains Mono', monospace; font-size: 13px;}
.beam-row .lp { color: var(--accent-2); font-family: 'JetBrains Mono', monospace;}

/* ---------- Summarization ---------- */
.sum-out { display: flex; flex-direction: column; gap: 6px;}
.sum-sent { background: var(--panel); border: 1px solid var(--line); padding: 10px 14px; border-radius: 8px; display: flex; gap: 14px; align-items: center;}
.sum-sent.in { border-color: var(--good); background: rgba(40,209,124,.07);}
.sum-sent .rank { color: var(--accent); font-family: 'JetBrains Mono', monospace; font-weight: 700; min-width: 28px;}
.sum-sent .score { color: var(--accent-2); font-family: 'JetBrains Mono', monospace; min-width: 60px; text-align: right;}
.sum-sent .text { flex: 1; font-size: 13.5px;}
.sum-final { background: var(--bg-2); border: 1px solid var(--good); border-left-width: 3px; border-radius: 10px; padding: 16px; font-size: 14.5px; line-height: 1.6;}

/* ---------- QA ---------- */
.qa-ans { background: var(--bg-2); border: 1px solid var(--accent-2); border-left: 3px solid var(--accent-2); border-radius: 10px; padding: 16px; font-size: 17px; font-weight: 600; color: var(--accent-2);}
.qa-cand { background: var(--panel); border: 1px solid var(--line); padding: 8px 12px; border-radius: 8px; margin-bottom: 4px; display: flex; gap: 12px; align-items: center; font-size: 13px;}
.qa-cand .qs { color: var(--accent-2); font-family: 'JetBrains Mono', monospace; min-width: 50px;}
.qa-cand .qt { flex: 1; font-family: 'JetBrains Mono', monospace; color: var(--text);}

/* ---------- BLEU ---------- */
.bleu-break { font-family: 'JetBrains Mono', monospace; font-size: 12px; line-height: 1.8;}
.bleu-break .row { display: flex; justify-content: space-between; padding: 3px 0; border-bottom: 1px solid var(--line);}
.bleu-break .row:last-child { border-bottom: 0; font-weight: 700; color: var(--accent-2);}

/* ---------- Confusion matrix ---------- */
#cmTest .nb-row input { font-size: 12.5px;}
.cm-grid { overflow-x: auto;}
.cm-grid table { border-collapse: collapse; font-family: 'JetBrains Mono', monospace; font-size: 13px;}
.cm-grid td, .cm-grid th { padding: 12px 18px; text-align: center; border: 1px solid var(--line);}
.cm-grid th { background: var(--bg-3); color: var(--muted); font-weight: 600;}
.cm-grid td.diag { background: rgba(40,209,124,.16); color: var(--good); font-weight: 700; border-color: var(--good);}
.cm-grid td.off { background: rgba(255,93,108,.10); color: var(--bad);}
.cm-grid .lab { text-align: right; color: var(--accent); font-weight: 600;}
.cm-metrics { font-family: 'JetBrains Mono', monospace; font-size: 12.5px;}
.cm-metrics .row { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid var(--line);}
.cm-metrics .row:last-child { border-bottom: 0;}
.cm-metrics .lbl { color: var(--muted);}
.cm-metrics .v { color: var(--accent-2);}

/* ---------- Flashcards ---------- */
.fc-controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 14px 0 18px;}
.fc-controls select { width: auto; min-width: 200px;}
.fc-progress { margin-left: auto; color: var(--muted); font-size: 13px; font-family: 'JetBrains Mono', monospace;}
.fc-card {
  background: linear-gradient(135deg, var(--panel), var(--bg-3));
  border: 1px solid var(--line); border-radius: 16px;
  padding: 36px; min-height: 220px;
  position: relative; cursor: pointer;
  transition: transform .25s, box-shadow .25s;
  box-shadow: var(--shadow);
}
.fc-card:hover { transform: translateY(-2px); box-shadow: 0 16px 50px rgba(0,0,0,.5);}
.fc-card.flipped .fc-q { display: none; }
.fc-card.flipped .fc-a { display: block; }
.fc-face { font-size: 18px; line-height: 1.6; }
.fc-q { color: var(--text); font-weight: 600; }
.fc-a { display: none; color: var(--accent-2); }
.fc-tags { position: absolute; top: 14px; right: 18px; display: flex; gap: 5px; flex-wrap: wrap;}
.fc-tags .chip { font-size: 10px; padding: 2px 7px; opacity: .6;}
.fc-actions { display: flex; gap: 10px; margin-top: 14px; justify-content: center;}
.fc-stats { display: flex; justify-content: center; gap: 24px; margin-top: 14px; color: var(--muted); font-size: 13px;}
.fc-stats b { color: var(--accent-2); font-family: 'JetBrains Mono', monospace; margin-right: 4px;}

.footer { margin-top: 60px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px;}
.footer code { background: var(--bg-3); padding: 2px 6px; border-radius: 4px; color: var(--accent-2);}
.muted { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  body { flex-direction: column;}
  .sidebar { width: 100%; height: auto; position: relative; flex-direction: row; flex-wrap: wrap; padding: 14px;}
  .sidebar nav { flex-direction: row; flex-wrap: wrap; gap: 4px;}
  .sidebar nav a { padding: 6px 10px; font-size: 12px;}
  .theme-toggle { margin: 0;}
  .content { padding: 28px 22px;}
  h1 { font-size: 38px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .lr-grid, .emb-grid { grid-template-columns: 1fr; }
  .lr-grid canvas, .emb-grid canvas { width: 100%; height: auto;}
  .tl { grid-template-columns: repeat(2, 1fr); }
}