@import url("https://fonts.googleapis.com/css2?family=Fraunces:wght@600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

:root {
  color-scheme: light;
  --bg-top: #fff4df;
  --bg-bottom: #f5fbff;
  --paper: rgba(255, 252, 247, 0.86);
  --paper-strong: #fffaf2;
  --ink: #201a16;
  --muted: #6a5f58;
  --line: rgba(32, 26, 22, 0.1);
  --coral: #ff8c69;
  --coral-deep: #d55836;
  --mint: #bfe9d7;
  --mint-deep: #2e7b68;
  --sun: #ffd76d;
  --shadow: 0 28px 70px rgba(52, 35, 18, 0.14);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 215, 109, 0.42), transparent 28%),
    radial-gradient(circle at top right, rgba(255, 140, 105, 0.24), transparent 24%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(8px);
  opacity: 0.55;
}

body::before {
  top: 5%;
  right: 4%;
  width: 180px;
  height: 180px;
  background: rgba(191, 233, 215, 0.5);
}

body::after {
  bottom: 6%;
  left: 3%;
  width: 220px;
  height: 220px;
  background: rgba(255, 140, 105, 0.2);
}

body.runtime-page,
body.notion-embed-page {
  background: transparent;
}

body.runtime-page::before,
body.runtime-page::after,
body.notion-embed-page::before,
body.notion-embed-page::after {
  display: none;
}

.page-shell {
  width: min(1240px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 48px;
}

.hero {
  padding: 24px 8px 30px;
}

.eyebrow,
.kicker,
.mini-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  color: var(--muted);
}

.hero h1,
.panel h2 {
  font-family: "Fraunces", serif;
  letter-spacing: -0.03em;
  margin: 12px 0 0;
}

.hero h1 {
  font-size: clamp(2.9rem, 6vw, 5.2rem);
  line-height: 0.94;
  max-width: 11ch;
}

.lede {
  max-width: 66ch;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
  margin: 16px 0 0;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.pill {
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 8px 20px rgba(32, 26, 22, 0.04);
  font-size: 0.82rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.66);
  box-shadow: var(--shadow);
  padding: 24px;
  backdrop-filter: blur(16px);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.9;
}

.panel-coral::before {
  background:
    linear-gradient(135deg, rgba(255, 140, 105, 0.12), transparent 30%),
    radial-gradient(circle at 100% 0%, rgba(255, 215, 109, 0.2), transparent 24%);
}

.panel-mint::before {
  background:
    linear-gradient(135deg, rgba(191, 233, 215, 0.16), transparent 34%),
    radial-gradient(circle at 100% 0%, rgba(103, 189, 160, 0.16), transparent 28%);
}

.panel-head {
  position: relative;
  z-index: 1;
}

.panel h2 {
  font-size: 2.15rem;
}

.panel-copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.72;
  max-width: 52ch;
}

.playground {
  position: relative;
  z-index: 1;
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.psvm-card-stack {
  position: relative;
  z-index: 1;
  margin-top: 22px;
  display: grid;
  gap: 16px;
}

.board-column,
.inspector-column {
  display: grid;
  gap: 16px;
}

.status-card,
.mini-card {
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.status-card {
  padding: 14px 16px;
  line-height: 1.65;
  min-height: 76px;
  display: flex;
  align-items: center;
}

.mini-card {
  padding: 16px;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.code-stack {
  margin-top: 12px;
  display: grid;
  gap: 12px;
}

.code-section {
  display: grid;
  gap: 8px;
}

.tool-call-card {
  display: grid;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255, 215, 109, 0.12), rgba(191, 233, 215, 0.14)),
    rgba(255, 255, 255, 0.82);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.tool-call-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tool-call-name {
  font-family: "Fraunces", serif;
  font-size: 1.06rem;
  letter-spacing: -0.02em;
}

.tool-call-badge {
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(32, 26, 22, 0.08);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.tool-call-grid {
  display: grid;
  gap: 10px;
}

.tool-call-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.tool-call-key {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.tool-call-value {
  line-height: 1.55;
  word-break: break-word;
}

.code-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.code-block {
  margin: 0;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
  line-height: 1.6;
  font-size: 0.78rem;
  white-space: pre-wrap;
  overflow: auto;
  max-height: 140px;
}

.code-block-trace {
  background:
    linear-gradient(180deg, rgba(255, 140, 105, 0.06), rgba(191, 233, 215, 0.1)),
    rgba(255, 255, 255, 0.72);
  max-height: 190px;
}

.button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  font-family: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, opacity 140ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.button-primary {
  background: var(--ink);
  color: #fff9ef;
  box-shadow: 0 12px 26px rgba(32, 26, 22, 0.18);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  border: 1px solid var(--line);
}

.ttt-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.ttt-cell {
  aspect-ratio: 1;
  border: 0;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 247, 238, 0.92));
  border: 1px solid rgba(32, 26, 22, 0.08);
  box-shadow: 0 16px 30px rgba(32, 26, 22, 0.08);
  color: var(--ink);
  font-family: "Fraunces", serif;
  font-size: clamp(2rem, 6vw, 3.4rem);
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.ttt-cell:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.01);
  box-shadow: 0 22px 34px rgba(32, 26, 22, 0.12);
}

.ttt-cell.is-x {
  color: var(--coral-deep);
}

.ttt-cell.is-o {
  color: var(--mint-deep);
}

.ttt-cell.is-win {
  background: linear-gradient(180deg, rgba(255, 215, 109, 0.4), rgba(255, 255, 255, 0.98));
}

.analysis-list,
.trace-list {
  margin-top: 12px;
}

.analysis-list {
  display: grid;
  gap: 10px;
}

.analysis-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line);
}

.analysis-row.is-best {
  background: rgba(255, 215, 109, 0.28);
  border-color: rgba(255, 215, 109, 0.55);
}

.analysis-move {
  font-weight: 600;
}

.analysis-badge {
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
}

.badge-win {
  background: rgba(191, 233, 215, 0.52);
  color: var(--mint-deep);
}

.badge-draw {
  background: rgba(255, 215, 109, 0.44);
  color: #7d5a00;
}

.badge-loss {
  background: rgba(255, 140, 105, 0.32);
  color: var(--coral-deep);
}

.trace-list {
  list-style: none;
  padding: 0;
  margin-bottom: 0;
  display: grid;
  gap: 8px;
}

.trace-list-scroll {
  max-height: 240px;
  overflow: auto;
  padding-right: 4px;
  scrollbar-gutter: stable;
}

.trace-list li {
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line);
  line-height: 1.5;
}

.trace-list-scroll::-webkit-scrollbar {
  width: 8px;
}

.trace-list-scroll::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(32, 26, 22, 0.18);
}

.sudoku-source-card {
  display: grid;
  gap: 10px;
}

.receipt-source-card {
  display: grid;
  gap: 10px;
}

.tally-source-card {
  display: grid;
  gap: 10px;
}

.field-label {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.field-input {
  width: 100%;
  font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.field-select {
  padding: 11px 14px;
}

.control-select {
  flex: 1 1 180px;
  min-width: 170px;
  width: auto;
}

.field-textarea {
  min-height: 128px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.55;
}

.receipt-input {
  min-height: 260px;
}

.tally-input {
  min-height: 280px;
}

.receipt-file-input {
  padding: 10px 12px;
}

.field-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.55;
}

.control-row-compact {
  margin-top: 2px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.receipt-candidate-row {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
}

.receipt-candidate-main {
  display: grid;
  gap: 8px;
}

.receipt-candidate-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.receipt-candidate-meta {
  color: var(--muted);
  font-size: 0.76rem;
}

.receipt-candidate-line {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  word-break: break-word;
}

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

.receipt-chip {
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(32, 26, 22, 0.08);
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.receipt-score-stack {
  display: grid;
  gap: 6px;
  justify-items: end;
}

.tally-family-row {
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: start;
}

.tally-family-main {
  display: grid;
  gap: 8px;
}

.tally-field-list {
  max-height: 360px;
}

.tally-field-row {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
}

.tally-field-main {
  display: grid;
  gap: 8px;
}

.tally-field-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

.tally-candidate-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tally-candidate-pill {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.4;
}

.tally-inline-meta {
  color: var(--muted);
  font-size: 0.72rem;
}

.tally-json {
  min-height: 220px;
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 0;
  border-radius: 24px;
  overflow: hidden;
  border: 2px solid rgba(32, 26, 22, 0.16);
  background: rgba(255, 255, 255, 0.82);
}

.sudoku-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid rgba(32, 26, 22, 0.08);
  border-bottom: 1px solid rgba(32, 26, 22, 0.08);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  min-height: 44px;
  transition: background 140ms ease, transform 140ms ease, color 140ms ease;
}

.sudoku-cell.block-right {
  border-right: 2px solid rgba(32, 26, 22, 0.18);
}

.sudoku-cell.block-bottom {
  border-bottom: 2px solid rgba(32, 26, 22, 0.18);
}

.sudoku-cell.is-given {
  background: rgba(255, 215, 109, 0.2);
  font-weight: 600;
}

.sudoku-cell.is-live {
  color: var(--mint-deep);
}

.sudoku-cell.is-focus {
  background: rgba(191, 233, 215, 0.34);
}

.sudoku-cell.is-place {
  background: rgba(191, 233, 215, 0.5);
  transform: scale(1.02);
}

.sudoku-cell.is-backtrack {
  background: rgba(255, 140, 105, 0.28);
  color: var(--coral-deep);
}

.stats-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.flow-strip {
  margin-top: 12px;
  display: flex;
  align-items: stretch;
  gap: 10px;
  flex-wrap: wrap;
}

.flow-node {
  flex: 1 1 180px;
  min-width: 0;
  border-radius: 14px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line);
}

.flow-node.is-active {
  background:
    linear-gradient(135deg, rgba(191, 233, 215, 0.24), rgba(255, 215, 109, 0.16)),
    rgba(255, 255, 255, 0.82);
  border-color: rgba(46, 123, 104, 0.22);
}

.flow-node-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.flow-node-title {
  font-size: 0.82rem;
  font-weight: 600;
}

.flow-node-body {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.55;
}

.flow-badge {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(32, 26, 22, 0.08);
  color: var(--muted);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.flow-badge.is-active {
  background: rgba(46, 123, 104, 0.16);
  color: var(--mint-deep);
}

.flow-arrow {
  align-self: center;
  color: var(--muted);
  font-size: 1rem;
}

.stat-card {
  border-radius: 14px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line);
}

.stat-label {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  margin-bottom: 6px;
}

.stat-value {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
}

.footer-note {
  margin-top: 26px;
  padding: 16px 8px 0;
  color: var(--muted);
  line-height: 1.75;
}

.rationale-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.single-demo-shell {
  width: min(980px, calc(100vw - 24px));
  padding-top: 24px;
}

.single-demo-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.single-demo-shell .playground {
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
}

.single-demo-shell .inspector-column {
  order: 1;
}

.single-demo-shell .board-column {
  order: 2;
}

body.runtime-page .page-shell,
body.notion-embed-page .page-shell {
  width: min(1100px, calc(100vw - 8px));
  padding: 8px 0 10px;
}

body.runtime-page .single-demo-grid,
body.notion-embed-page .single-demo-grid {
  margin-top: 0;
}

body.runtime-page .panel,
body.notion-embed-page .panel {
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
  padding: 0;
  overflow: visible;
}

body.runtime-page .panel::before,
body.runtime-page .hero,
body.runtime-page .panel-head,
body.notion-embed-page .panel::before,
body.notion-embed-page .hero,
body.notion-embed-page .panel-head {
  display: none;
}

body.runtime-page .playground,
body.notion-embed-page .playground {
  margin-top: 0;
  gap: 14px;
}

body.runtime-page .single-demo-shell .playground,
body.notion-embed-page .single-demo-shell .playground {
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
}

body.runtime-page .status-card,
body.runtime-page .mini-card,
body.notion-embed-page .status-card,
body.notion-embed-page .mini-card {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: none;
}

.hero-compact {
  padding-bottom: 20px;
}

.hero-compact h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  max-width: none;
}

.rationale-card {
  background: rgba(255, 255, 255, 0.72);
}

.rationale-copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.rationale-list {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
  line-height: 1.6;
}

.empty-state {
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 1080px) {
  .demo-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 1240px);
    padding-top: 24px;
  }

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

  .panel {
    padding: 18px;
  }

  .ttt-cell {
    border-radius: 18px;
  }

  .flow-strip {
    flex-direction: column;
  }

  .flow-arrow {
    display: none;
  }
}