/* ═══════════════════════════════════════════════════════════
   Transformer Explorer — integrated dark-theme styles
   Uses CSS vars from base.html (:root)
   ═══════════════════════════════════════════════════════════ */

/* ── Root scope ── */
.tt-root {
  --tt-accent: #FD79A8;
  --tt-accent-15: rgba(253,121,168,.15);
  --tt-accent-25: rgba(253,121,168,.25);
  --tt-accent-08: rgba(253,121,168,.08);
  --tt-accent-04: rgba(253,121,168,.04);
  --tt-hi: #74b9ff;
  --tt-gold: #fdcb6e;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

/* ── Hero ── */
.tt-hero {
  text-align: center;
  padding: 2.5rem 0 2rem;
}
.tt-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3rem .9rem;
  border-radius: 50px;
  font-size: .75rem;
  font-weight: 600;
  background: var(--tt-accent-15);
  color: #fab1c4;
  margin-bottom: 1rem;
}
.tt-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -.03em;
  margin-bottom: .6rem;
}
.tt-hero-sub {
  color: var(--text-secondary);
  font-size: .95rem;
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Section ── */
.tt-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem 1.5rem;
  margin-bottom: 1.5rem;
  transition: border-color .3s;
}
.tt-section:hover {
  border-color: var(--border-hover);
}

.tt-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: .35rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.tt-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--tt-accent-15);
  color: var(--tt-accent);
  font-size: .85rem;
  font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.tt-section-sub {
  color: var(--text-secondary);
  font-size: .88rem;
  max-width: 680px;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.tt-section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

/* ── Math section ── */
.tt-math-section {
  background: transparent;
  border: none;
  padding: 0 0 1rem;
}
.tt-math-body {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  color: var(--text-secondary);
  font-size: .9rem;
  line-height: 1.7;
}
.tt-math-body strong {
  color: var(--text-primary);
}
.tt-math-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  text-align: center;
}
.tt-math-block p { margin: .3rem 0; }

/* ── Controls ── */
.tt-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem;
}

.tt-btn-group {
  display: inline-flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.tt-btn-tab {
  padding: .4rem .85rem;
  font-size: .8rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background .2s, color .2s;
  font-family: var(--font-sans);
}
.tt-btn-tab:not(:last-child) {
  border-right: 1px solid var(--border-color);
}
.tt-btn-tab:hover {
  background: rgba(255,255,255,.04);
  color: var(--text-primary);
}
.tt-btn-tab.active {
  background: var(--tt-accent-15);
  color: var(--tt-accent);
}

.tt-range {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .82rem;
  color: var(--text-secondary);
}
.tt-range label {
  white-space: nowrap;
  font-weight: 500;
}
.tt-range input[type="range"] {
  width: 110px;
  accent-color: var(--tt-accent);
}
.tt-range-val {
  font-weight: 700;
  font-family: var(--font-mono);
  min-width: 2rem;
  text-align: right;
  color: var(--text-primary);
}

.tt-btn {
  padding: .45rem .9rem;
  font-size: .82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all .2s;
  font-family: var(--font-sans);
}
.tt-btn-ghost {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.tt-btn-ghost:hover {
  border-color: var(--tt-accent-25);
  color: var(--tt-accent);
  background: var(--tt-accent-04);
}

/* ── Card grid (sentence selector) ── */
.tt-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
  gap: .75rem;
  margin-bottom: 1.2rem;
}
.tt-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: .85rem 1rem;
  cursor: pointer;
  transition: all .2s;
  text-align: left;
}
.tt-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}
.tt-card.selected {
  border-color: var(--tt-accent);
  background: var(--tt-accent-08);
  box-shadow: 0 0 16px var(--tt-accent-08);
}
.tt-card h5 {
  font-size: .88rem;
  font-weight: 700;
  margin-bottom: .3rem;
}
.tt-card p {
  font-size: .78rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

/* ── Token preview ── */
.tt-token-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.tt-sentence-display {
  max-width: 880px;
  text-align: center;
}
.tt-sentence-text {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: .75rem;
}
.tt-sentence-words {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
}
.tt-word {
  background: var(--tt-accent-08);
  border: 1px solid var(--tt-accent-15);
  border-radius: var(--radius-sm);
  padding: .5rem .75rem .35rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 60px;
  transition: background .2s;
}
.tt-word:hover { background: var(--tt-accent-15); }
.tt-word-text {
  font-size: .9rem;
  font-weight: 600;
}
.tt-word-idx {
  font-size: .68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ── Chip row (query selector) ── */
.tt-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1rem;
}
.tt-chip {
  padding: .35rem .8rem;
  border-radius: 50px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all .2s;
  font-size: .8rem;
  font-weight: 500;
  font-family: var(--font-sans);
}
.tt-chip:hover {
  border-color: var(--tt-accent-25);
  color: var(--text-primary);
  background: var(--tt-accent-04);
}
.tt-chip.active {
  background: var(--tt-accent);
  border-color: var(--tt-accent);
  color: #fff;
  box-shadow: 0 0 12px rgba(253,121,168,.35);
}

/* ── Matrix / Embedding table ── */
.tt-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
}
.tt-matrix {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: .82rem;
}
.tt-matrix thead th {
  padding: .6rem .7rem;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  text-align: center;
  color: var(--text-muted);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.tt-matrix tbody td {
  padding: .5rem .65rem;
  border-bottom: 1px solid rgba(255,255,255,.03);
  text-align: center;
  color: var(--text-secondary);
  transition: background .2s;
}
.tt-matrix tbody tr:hover { background: rgba(255,255,255,.02); }
.tt-matrix tbody tr.highlight {
  background: var(--tt-accent-08);
}
.tt-matrix tbody td:first-child {
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
  padding-left: 1rem;
}

/* ── Attention flow ── */
.tt-flow-wrap {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: .8rem;
  margin-bottom: 1rem;
  overflow-x: auto;
}
.tt-flow-wrap svg {
  width: 100%;
  min-width: 500px;
  height: 320px;
  display: block;
}

/* ── Heatmap ── */
.tt-heatmap-wrap {
  overflow-x: auto;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
}
.tt-heatmap {
  width: 100%;
  border-collapse: collapse;
}
.tt-heatmap thead th,
.tt-heatmap tbody td {
  padding: .55rem .6rem;
  text-align: center;
  font-size: .8rem;
  border: 1px solid rgba(255,255,255,.04);
  font-family: var(--font-mono);
}
.tt-heatmap thead th {
  background: rgba(255,255,255,.03);
  font-weight: 600;
  color: var(--text-muted);
}
.tt-heatmap tbody th {
  background: rgba(255,255,255,.03);
  font-weight: 600;
  color: var(--text-muted);
  text-align: right;
  padding-right: .75rem;
}
.tt-heatmap tbody tr.active-row th {
  background: var(--tt-accent-15);
  color: var(--tt-accent);
}
.tt-heatmap tbody td {
  cursor: pointer;
  transition: transform .15s;
  position: relative;
}
.tt-heatmap tbody td:hover {
  transform: scale(1.08);
  z-index: 1;
}

/* ── Context view ── */
.tt-context-wrap {
  display: grid;
  gap: .75rem;
}
.tt-context-card {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
}
.tt-context-card h4 {
  font-size: .95rem;
  margin-bottom: .5rem;
}
.tt-context-values {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  font-family: var(--font-mono);
  font-size: .78rem;
}
.tt-context-values span {
  padding: .25rem .55rem;
  border-radius: 6px;
  background: var(--tt-accent-08);
  color: var(--text-secondary);
}

/* ── Encoder grid ── */
.tt-encoder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: .75rem;
}
.tt-enc-card {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  transition: border-color .2s;
}
.tt-enc-card:hover {
  border-color: var(--border-hover);
}
.tt-enc-card h4 {
  font-size: .85rem;
  margin-bottom: .4rem;
  color: var(--text-muted);
}
.tt-enc-label {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 700;
  font-size: .9rem;
  margin-bottom: .5rem;
}
.tt-enc-badge {
  background: var(--tt-accent-15);
  color: #fab1c4;
  padding: .15rem .5rem;
  border-radius: 50px;
  font-size: .7rem;
  font-weight: 600;
}
.tt-enc-scalar {
  margin-top: .6rem;
  font-size: .88rem;
  color: var(--tt-hi);
  font-family: var(--font-mono);
}

/* ── Decoder ── */
.tt-decoder-seq {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  justify-content: center;
  margin-bottom: 1rem;
}
.tt-dec-token {
  background: rgba(253,203,110,.08);
  border: 1px solid rgba(253,203,110,.2);
  border-radius: 50px;
  padding: .4rem .9rem;
  font-weight: 600;
  font-size: .85rem;
  color: var(--tt-gold);
  letter-spacing: .02em;
}
.tt-decoder-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

/* ── Decoder ranking ── */
.tt-decoder-ranking table {
  width: 100%;
  border-collapse: collapse;
}
.tt-decoder-ranking thead th {
  background: rgba(255,255,255,.03);
  padding: .6rem .75rem;
  font-weight: 600;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.tt-decoder-ranking tbody td {
  padding: .6rem .75rem;
  border-bottom: 1px solid rgba(255,255,255,.03);
  font-size: .88rem;
}
.tt-decoder-ranking tbody tr {
  transition: background .15s;
}
.tt-decoder-ranking tbody tr:hover {
  background: rgba(255,255,255,.03);
}
.tt-dec-add-btn {
  padding: .35rem .8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
  font-family: var(--font-sans);
}
.tt-dec-add-btn:hover {
  border-color: var(--tt-accent);
  color: var(--tt-accent);
  background: var(--tt-accent-04);
}
.tt-dec-prob-bar {
  display: inline-block;
  height: 6px;
  border-radius: 3px;
  background: var(--tt-accent);
  opacity: .6;
  margin-right: .5rem;
  vertical-align: middle;
  transition: width .3s;
}

/* ── Dictionary ── */
.tt-dict-toggle-wrap {
  text-align: center;
  margin-top: 1rem;
}
.tt-dict-collapsible.collapsed {
  display: none;
}
.tt-dict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: .5rem;
}
.tt-dict-entry {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: .5rem .7rem;
  text-align: center;
  font-weight: 600;
  font-size: .85rem;
  color: var(--text-secondary);
  transition: border-color .2s;
}
.tt-dict-entry:hover {
  border-color: var(--border-hover);
}

/* ── SVG attention elements ── */
.tt-attn-label {
  fill: var(--text-primary);
  font-size: 13px;
  text-anchor: middle;
  pointer-events: none;
  font-family: var(--font-sans);
  font-weight: 600;
}
.tt-attn-node {
  cursor: pointer;
  transition: opacity .2s;
}
.tt-attn-node:hover { opacity: .85; }
.tt-attn-node.selected circle {
  stroke: var(--tt-gold);
  stroke-width: 3;
}
.tt-attn-arrow {
  fill: none;
  stroke-linecap: round;
  transition: opacity .2s, stroke-width .2s;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .tt-section-header { flex-direction: column; align-items: flex-start; }
  .tt-controls { width: 100%; }
  .tt-range { width: 100%; }
  .tt-range input[type="range"] { flex: 1; }
  .tt-card-grid { grid-template-columns: 1fr 1fr; }
  .tt-encoder-grid { grid-template-columns: 1fr; }
  .tt-flow-wrap svg { height: 240px; }
}

@media (max-width: 480px) {
  .tt-card-grid { grid-template-columns: 1fr; }
  .tt-root { padding: 1rem .75rem 2rem; }
}