:root {
  --bg: #efe8db;
  --paper: #fffaf2;
  --ink: #1d2522;
  --muted: #5c6963;
  --accent: #9a3412;
  --accent-soft: #f0b26a;
  --accent-cool: #0f766e;
  --deep: #121614;
  --deep-soft: #1a211d;
  --line: #d5c6b4;
  --shadow: rgba(53, 44, 26, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(154, 52, 18, 0.14), transparent 26rem),
    linear-gradient(180deg, #f8f1e6, var(--bg));
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

.page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.hero-copy,
.hero-panel,
.editor-card,
.results-card,
.detail-card,
.formula-band,
.guide-card {
  background: rgba(255, 250, 242, 0.88);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px var(--shadow);
  border-radius: 1.4rem;
  backdrop-filter: blur(8px);
}

.hero-copy {
  padding: 1.8rem;
}

.hero-copy h1 {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  line-height: 0.95;
  margin: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-size: 0.75rem;
  margin-bottom: 0.6rem;
}

.lede {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 48rem;
}

.hero-panel {
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.hero-metric {
  background: linear-gradient(135deg, rgba(154, 52, 18, 0.11), rgba(240, 178, 106, 0.18));
  border-radius: 1rem;
  padding: 0.9rem 1rem;
}

.hero-metric span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.hero-metric strong {
  font-size: 1.1rem;
}

.workspace {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
}

.editor-card,
.results-card {
  padding: 1rem;
}

.editor-card {
  position: relative;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.card-header h2,
.detail-card h3 {
  margin: 0;
}

.editor-shell {
  border-radius: 1.15rem;
  border: 1px solid rgba(21, 31, 27, 0.1);
  overflow: clip;
  background:
    linear-gradient(180deg, rgba(18, 22, 20, 0.96), rgba(20, 24, 22, 0.98)),
    radial-gradient(circle at top left, rgba(240, 178, 106, 0.12), transparent 18rem);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 14px 30px rgba(25, 22, 17, 0.2);
}

.editor-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  padding: 0.9rem 1rem 0.8rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0));
  border-bottom: 1px solid rgba(240, 178, 106, 0.18);
}

.editor-mode-label {
  margin: 0 0 0.25rem;
  color: #f5e8d6;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.editor-hint {
  margin: 0;
  color: rgba(245, 235, 221, 0.72);
  max-width: 40rem;
  font-size: 0.92rem;
}

.editor-status,
.status-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.editor-status {
  border: 1px solid rgba(247, 178, 103, 0.18);
  background: rgba(247, 178, 103, 0.1);
  color: #f7b267;
}

.editor-status[data-tone="ready"] {
  background: rgba(15, 118, 110, 0.18);
  border-color: rgba(15, 118, 110, 0.3);
  color: #8bd3c7;
}

.editor-status[data-tone="fallback"] {
  background: rgba(154, 52, 18, 0.18);
  border-color: rgba(154, 52, 18, 0.32);
  color: #ffd29d;
}

.editor-surface {
  min-height: 32rem;
}

#source-editor {
  display: none;
  height: 32rem;
}

#source-editor.is-ready {
  display: block;
}

#source-fallback {
  width: 100%;
  min-height: 32rem;
  border: 0;
  padding: 1rem;
  resize: vertical;
  background: transparent;
  color: #eef1ee;
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.95rem;
  line-height: 1.5;
}

#source-fallback:focus {
  outline: none;
}

#source-fallback.is-hidden {
  display: none;
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-top: 0.9rem;
}

.label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

label span {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input {
  width: 100%;
  border-radius: 0.8rem;
  border: 1px solid var(--line);
  padding: 0.8rem 0.9rem;
  background: white;
  font: inherit;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  background: linear-gradient(135deg, var(--accent), #6a2113);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

.guide-card {
  padding: 1rem;
}

.guide-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.guide-list li + li {
  margin-top: 0.45rem;
}

.guide-list code {
  color: var(--accent);
}

.status-chip {
  background: rgba(154, 52, 18, 0.12);
  color: var(--accent);
  border: 1px solid transparent;
}

.status-chip[data-tone="running"] {
  background: rgba(240, 178, 106, 0.18);
  color: #8d4e0d;
}

.status-chip[data-tone="completed"] {
  background: rgba(15, 118, 110, 0.12);
  border-color: rgba(15, 118, 110, 0.18);
  color: var(--accent-cool);
}

.status-chip[data-tone="failed"] {
  background: rgba(153, 27, 27, 0.1);
  border-color: rgba(153, 27, 27, 0.16);
  color: #991b1b;
}

.task-list {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.task-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--line);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  text-align: left;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.task-row:hover {
  transform: translateY(-1px);
  border-color: rgba(154, 52, 18, 0.35);
}

.task-row[data-state="running"] {
  background: rgba(240, 178, 106, 0.12);
}

.task-row[data-state="completed"] {
  background: rgba(15, 118, 110, 0.08);
}

.task-row[data-state="failed"] {
  background: rgba(153, 27, 27, 0.06);
}

.task-meta {
  display: grid;
  gap: 0.2rem;
}

.task-state {
  text-transform: capitalize;
  color: var(--accent);
}

.task-caption {
  color: var(--muted);
  font-size: 0.76rem;
}

.result-panel.empty {
  min-height: 20rem;
  display: grid;
  place-items: center;
  color: var(--muted);
}

.empty-state {
  max-width: 26rem;
  text-align: center;
}

.empty-state h3 {
  margin: 0 0 0.7rem;
  font-size: 1.7rem;
  line-height: 1.05;
  color: var(--ink);
}

.empty-state p {
  margin: 0;
}

.empty-kicker {
  margin-bottom: 0.5rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

.formula-band {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.formula-card {
  padding: 1rem;
}

.formula-band pre,
.distribution-entry pre,
code {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

.math-block,
.math-inline,
.math-cell {
  border-radius: 0.9rem;
  border: 1px solid rgba(21, 31, 27, 0.08);
  background: rgba(255, 255, 255, 0.7);
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  scrollbar-width: thin;
  scrollbar-color: rgba(154, 52, 18, 0.45) rgba(0, 0, 0, 0.06);
}

.math-block {
  padding: 1rem;
  min-height: 5.5rem;
  white-space: nowrap;
}

.math-inline,
.math-cell {
  padding: 0.55rem 0.7rem;
  white-space: nowrap;
}

.math-inline-strong {
  margin-bottom: 0.8rem;
}

.math-ready .katex-display {
  margin: 0;
  white-space: nowrap;
}

.math-fallback {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  white-space: nowrap;
}

.math-block .katex,
.math-inline .katex,
.math-cell .katex {
  white-space: nowrap;
}

.math-block::-webkit-scrollbar,
.math-inline::-webkit-scrollbar,
.math-cell::-webkit-scrollbar {
  height: 0.6rem;
}

.math-block::-webkit-scrollbar-track,
.math-inline::-webkit-scrollbar-track,
.math-cell::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.06);
  border-radius: 999px;
}

.math-block::-webkit-scrollbar-thumb,
.math-inline::-webkit-scrollbar-thumb,
.math-cell::-webkit-scrollbar-thumb {
  background: rgba(154, 52, 18, 0.45);
  border-radius: 999px;
}

.formula-plain {
  margin-top: 0.9rem;
}

.formula-plain summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.88rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.detail-card {
  padding: 1rem;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.6rem;
  border-top: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

thead th {
  border-top: 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.distribution-entry + .distribution-entry {
  margin-top: 1rem;
}

.callout.error {
  padding: 1rem;
  border-radius: 1rem;
  background: rgba(153, 27, 27, 0.1);
  border: 1px solid rgba(153, 27, 27, 0.25);
  color: #7f1d1d;
}

.callout.error p {
  margin: 0;
}

.callout.error p + p {
  margin-top: 0.45rem;
}

.muted {
  color: var(--muted);
}

dl {
  margin: 0;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0;
}

@media (max-width: 980px) {
  .hero,
  .workspace,
  .formula-band,
  .detail-grid,
  .controls,
  .guide-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    font-size: 2.6rem;
  }

  .editor-toolbar {
    flex-direction: column;
  }
}