:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f7f8fd;
  --line: #e2e6f0;
  --line-strong: #cfd7ea;
  --ink: #1f2437;
  --ink-soft: #6f7791;
  --brand: #7c63ff;
  --brand-soft: #ece8ff;
  --blue: #5b9dff;
  --mint: #2ec8a8;
  --orange: #ffb070;
  --shadow: 0 10px 26px rgba(44, 53, 88, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background: var(--bg);
  padding: 20px 12px 32px;
}

.app-shell {
  width: min(1400px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.topbar {
  padding: 14px;
  display: grid;
  gap: 12px;
}

.brand-wrap {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #7368d8;
  font-weight: 700;
}

.brand-wrap h1 {
  margin: 0;
  font-family: "Orbitron", "Space Grotesk", sans-serif;
  letter-spacing: 0.02em;
  font-size: clamp(1.15rem, 2.5vw, 1.85rem);
  color: #4d57b8;
}

.toolbar {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(280px, 2.4fr) repeat(4, minmax(150px, 1fr)) minmax(180px, 1.2fr);
  align-items: end;
}

.tool {
  display: grid;
  gap: 6px;
}

.tool label {
  font-size: 0.8rem;
  color: #5f6887;
  font-weight: 700;
}

select,
input[type="range"] {
  width: 100%;
}

select {
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  color: var(--ink);
  padding: 9px 10px;
  font-family: inherit;
  font-size: 0.92rem;
  outline: none;
}

select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(124, 99, 255, 0.15);
}

input[type="range"] {
  accent-color: var(--brand);
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.action-btn {
  border: 1px solid rgba(124, 99, 255, 0.4);
  border-radius: 9px;
  background: linear-gradient(128deg, #7a61ff 0%, #5f95ff 100%);
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 9px 10px;
  cursor: pointer;
}

.action-btn:hover {
  filter: brightness(1.04);
}

.action-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.action-btn.ghost {
  background: #fff;
  color: #4f5d86;
  border-color: var(--line-strong);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f9faff;
  color: #667091;
  font-size: 0.78rem;
  padding: 6px 10px;
}

.stage-panel {
  padding: 12px;
}

.stage-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(220px, 1fr) minmax(480px, 2.5fr) minmax(250px, 1fr);
}

.lane {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
  padding: 10px;
}

.lane-head {
  margin-bottom: 8px;
}

.lane-head h2 {
  margin: 0;
  font-size: 0.96rem;
  color: #36416d;
}

.lane-head p {
  margin: 2px 0 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.token-stream {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.token-vertical {
  display: grid;
  gap: 6px;
}

.token {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  color: #2b3453;
  padding: 6px 9px;
  cursor: pointer;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.token:hover {
  border-color: #b4a7ff;
  box-shadow: 0 4px 10px rgba(115, 105, 182, 0.16);
}

.token small {
  color: #8893b1;
  margin-left: 6px;
  font-family: "IBM Plex Mono", monospace;
}

.token.active {
  border-color: #7d64ff;
  background: #f1eeff;
  box-shadow: 0 0 0 3px rgba(125, 100, 255, 0.15);
}

.flow-artboard {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, #fcfcff 0%, #f8f9ff 100%);
  overflow: hidden;
}

.flow-artboard svg {
  width: 100%;
  height: auto;
  display: block;
}

.flow-card {
  fill: #ffffff;
  stroke: #dbe1f1;
  stroke-width: 1.5;
}

.flow-card.soft {
  fill: #fbfbff;
}

.flow-title {
  fill: #5a6386;
  font-size: 20px;
  font-weight: 700;
}

.flow-token {
  fill: #2d3556;
  font-size: 24px;
  font-weight: 500;
}

.flow-label {
  font-size: 34px;
  font-weight: 700;
}

.flow-label.q {
  fill: #7a65ff;
}

.flow-label.k {
  fill: #5d9fff;
}

.flow-label.v {
  fill: #32c7a7;
}

.flow-small {
  fill: #747d98;
  font-size: 14px;
  font-weight: 600;
}

.flow-ribbon {
  fill: none;
  stroke-linecap: round;
}

.flow-ribbon.q {
  stroke: url(#qLine);
  stroke-width: 3.3;
}

.flow-ribbon.k {
  stroke: url(#kLine);
  stroke-width: 3.3;
}

.flow-ribbon.v {
  stroke: url(#vLine);
  stroke-width: 3.3;
}

.flow-ribbon.out {
  stroke: rgba(124, 99, 255, 0.75);
  stroke-width: 4;
}

.attn-box {
  fill: #ffffff;
  stroke: #d9dff0;
  stroke-width: 1.2;
}

.attn-dot.faint {
  fill: #d9ddef;
}

.attn-dot.mid {
  fill: #bfb6ff;
}

.attn-dot.strong {
  fill: #816aff;
}

.mlp-col {
  fill: #e8edff;
  stroke: #d4dcf7;
  stroke-width: 1;
}

.prob-word {
  fill: #757d97;
  font-size: 28px;
}

.prob-word.strong {
  fill: #745efe;
  font-weight: 700;
}

.prob-bar {
  fill: #d9deea;
}

.prob-bar.strong {
  fill: #7a63ff;
}

.prob-val {
  fill: #7d859f;
  font-size: 22px;
  text-anchor: end;
}

.prob-val.strong {
  fill: #745efe;
  font-weight: 700;
}

.matrix-wrap {
  margin-top: 10px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 8px;
  max-height: 340px;
}

.matrix {
  display: grid;
  gap: 2px;
  min-width: fit-content;
}

.cell,
.header-cell {
  width: 34px;
  height: 28px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 10px;
  font-family: "IBM Plex Mono", monospace;
}

.header-cell {
  background: #f3f6ff;
  color: #606b8d;
  position: sticky;
  top: 0;
  left: 0;
}

.header-cell.row-head {
  left: 0;
  z-index: 2;
}

.header-cell.corner {
  z-index: 3;
}

.cell {
  color: #2b3557;
  border: 1px solid rgba(70, 84, 124, 0.08);
}

.cell.masked {
  background: #eceff7;
  color: #9ba5bf;
}

.cell.focus-row {
  outline: 2px solid rgba(124, 99, 255, 0.5);
}

.next-token-box {
  display: grid;
  gap: 8px;
}

.next-title {
  border-radius: 10px;
  padding: 10px;
  color: #fff;
  font-weight: 600;
  background: linear-gradient(122deg, #7a61ff, #5b9dff);
}

.next-row {
  display: grid;
  grid-template-columns: 80px 1fr 56px;
  gap: 8px;
  align-items: center;
  font-size: 0.82rem;
}

.next-word {
  color: #475173;
  font-family: "IBM Plex Mono", monospace;
}

.next-track {
  height: 11px;
  border-radius: 999px;
  background: #e8edf9;
  overflow: hidden;
}

.next-fill {
  height: 100%;
  background: linear-gradient(90deg, #ffb070, #ffd49a);
}

.next-val {
  text-align: right;
  color: #5f6a8d;
  font-family: "IBM Plex Mono", monospace;
}

.detail-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

.detail-grid .panel {
  padding: 12px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
}

.panel-head h2 {
  margin: 0;
  font-size: 0.98rem;
  color: #39436d;
}

.panel-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.79rem;
}

.bars {
  display: grid;
  gap: 7px;
}

.bar-row {
  display: grid;
  grid-template-columns: 120px 1fr 56px;
  gap: 8px;
  align-items: center;
  font-size: 0.82rem;
}

.bar-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #475172;
}

.bar-track {
  height: 11px;
  border-radius: 999px;
  background: #e8edf9;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #7b64ff, #5d9fff);
}

.bar-val {
  text-align: right;
  color: #5e698b;
  font-family: "IBM Plex Mono", monospace;
}

.qkv-grid {
  display: grid;
  gap: 8px;
}

.vector-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 8px;
}

.vector-box h3 {
  margin: 0 0 6px;
  color: #49557d;
  font-size: 0.86rem;
}

.vector-row {
  display: grid;
  grid-template-columns: 44px 1fr 52px;
  gap: 7px;
  align-items: center;
  font-size: 0.74rem;
}

.vector-track {
  height: 8px;
  border-radius: 999px;
  background: #edf1fa;
  overflow: hidden;
}

.vector-fill {
  height: 100%;
  background: linear-gradient(90deg, #ffaf6d, #ffd593);
}

.generated-stream {
  margin-top: 2px;
}

.generated-stream .token {
  background: #fffaf4;
  border-color: #f0dcc5;
  cursor: default;
}

.generated-stream .token.generated {
  border-color: #ebb68a;
}

.generated-text {
  margin-top: 10px;
  border: 1px dashed #d4dced;
  border-radius: 10px;
  background: #fafbff;
  color: #4a557a;
  padding: 10px;
  line-height: 1.5;
}

.footnote {
  margin: 0;
  text-align: center;
  color: #75809f;
  font-size: 0.8rem;
}

@media (max-width: 1250px) {
  .toolbar {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .sentence-tool {
    grid-column: 1 / -1;
  }

  .action-row {
    grid-column: span 3;
    max-width: 360px;
  }

  .stage-grid {
    grid-template-columns: 1fr;
  }

  .token-vertical {
    display: flex;
    flex-wrap: wrap;
  }
}

@media (max-width: 860px) {
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .flow-artboard {
    overflow-x: auto;
  }

  .flow-artboard svg {
    min-width: 940px;
  }
}

@media (max-width: 640px) {
  body {
    padding: 10px 8px 20px;
  }

  .topbar,
  .stage-panel,
  .detail-grid .panel,
  .panel {
    padding: 10px;
  }

  .toolbar {
    grid-template-columns: 1fr;
  }

  .action-row {
    grid-column: auto;
    max-width: none;
    grid-template-columns: 1fr;
  }

  .bar-row {
    grid-template-columns: 90px 1fr 48px;
    font-size: 0.76rem;
  }

  .next-row {
    grid-template-columns: 70px 1fr 48px;
    font-size: 0.76rem;
  }
}