:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f0f0ec;
  --border: #dcdcd5;
  --text: #1d1f21;
  --muted: #5d6166;
  --accent: #1f5f8b;
  --accent-text: #ffffff;
  --read: #2f6f3e;
  --read-bg: #e3f1e6;
  --write: #8a4b08;
  --write-bg: #fbecd9;
  --error: #9b1c1c;
  --error-bg: #fde8e8;
  --null: #8a8f96;
  --code-bg: #f3f3ef;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #15171a;
    --surface: #1d2024;
    --surface-2: #25292e;
    --border: #353a40;
    --text: #e6e6e3;
    --muted: #a0a5ab;
    --accent: #6cb4e8;
    --accent-text: #0e1a24;
    --read: #8fd19e;
    --read-bg: #1f3325;
    --write: #f0b26b;
    --write-bg: #3a2b18;
    --error: #ff9b9b;
    --error-bg: #3b1f1f;
    --null: #7c828a;
    --code-bg: #191b1f;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    16px / 1.55 system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
}

a {
  color: var(--accent);
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

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

.small {
  font-size: 0.875rem;
}

/* Header */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 12px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 4px 0 0;
  color: var(--muted);
  max-width: 60ch;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 8px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.status .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--write);
}

.status.ready .dot {
  background: var(--read);
}

.status.failed .dot {
  background: var(--error);
}

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
}

.tab {
  appearance: none;
  border: 0;
  border-bottom: 3px solid transparent;
  background: none;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: 10px 12px;
  cursor: pointer;
  white-space: nowrap;
}

.tab[aria-pressed="true"] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* Buttons and fields */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 7px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.field {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 0.9rem;
}

select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 8px;
}

/* Layout */

main.wrap {
  padding-top: 20px;
  padding-bottom: 32px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.toolbar h2 {
  margin: 0;
  font-size: 1.2rem;
}

.actions {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}

/* Scenarios */

.scenarios {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

@media (max-width: 760px) {
  .scenarios {
    grid-template-columns: minmax(0, 1fr);
  }
}

.scenario-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.scenario-list button {
  width: 100%;
  display: grid;
  grid-template-columns: 2ch 1fr auto;
  gap: 10px;
  align-items: center;
  text-align: left;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  cursor: pointer;
}

.scenario-list button[aria-current="true"] {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

.scenario-list .num {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 999px;
}

.badge.read {
  color: var(--read);
  background: var(--read-bg);
}

.badge.write {
  color: var(--write);
  background: var(--write-bg);
}

.scenario-detail h2 {
  margin: 0 0 4px;
  font-size: 1.3rem;
}

.scenario-detail .story {
  max-width: 75ch;
}

.callout {
  border-left: 3px solid var(--write);
  background: var(--surface-2);
  padding: 10px 14px;
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 75ch;
  font-size: 0.93rem;
}

.callout strong {
  display: block;
  margin-bottom: 2px;
}

pre.code,
textarea.code {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.5;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  overflow-x: auto;
  margin: 12px 0 0;
}

textarea.code {
  width: 100%;
  resize: vertical;
  color: var(--text);
}

/* Results */

.result-meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 12px 0 6px;
}

.error {
  color: var(--error);
  background: var(--error-bg);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
}

.table-scroll {
  overflow: auto;
  max-height: 65vh;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.875rem;
}

th,
td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  font-weight: 600;
}

td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

td.null {
  color: var(--null);
  font-style: italic;
}

tbody tr:hover td {
  background: var(--surface-2);
}

/* Schema */

.diagram {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--surface);
}

.diagram svg {
  max-width: none;
  height: auto;
}

.site-footer {
  color: var(--muted);
  font-size: 0.85rem;
  padding-bottom: 32px;
}