/*
 * PyMAPF playground styling.
 *
 * The palette is the same validated set the Python figures use
 * (pymapf/viz/theme.py), so a chart rendered by matplotlib and a canvas drawn
 * by the browser are the same colors. Light and dark are both authored; dark is
 * the default because the visualisations are dark-surface designs.
 */

:root {
  color-scheme: dark;

  --surface-1: #1a1a19;
  --surface-2: #201f1e;
  --plane: #0d0d0d;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --obstacle: #33332f;
  --border: rgba(255, 255, 255, 0.1);

  --s1: #3987e5;
  --s2: #d95926;
  --s3: #199e70;
  --s4: #c98500;
  --s5: #d55181;
  --s6: #008300;
  --s7: #9085e9;
  --s8: #e66767;

  --good: #0ca30c;
  --warning: #fab219;
  --critical: #d03b3b;

  --radius: 10px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --surface-2: #f2f1ee;
  --plane: #f9f9f7;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --obstacle: #d8d7d0;
  --border: rgba(11, 11, 11, 0.1);

  --s1: #2a78d6;
  --s2: #eb6834;
  --s3: #1baf7a;
  --s4: #eda100;
  --s5: #e87ba4;
  --s6: #008300;
  --s7: #4a3aa7;
  --s8: #e34948;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--s1); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); font-size: 13px; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ------------------------------------------------------------- header --- */

header.top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--plane) 86%, transparent);
  border-bottom: 1px solid var(--border);
}

.top-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 58px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 17px;
}

.logo-mark { width: 26px; height: 26px; }

.top nav { margin-left: auto; display: flex; gap: 6px; align-items: center; }

.top nav a {
  color: var(--ink-2);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
}
.top nav a:hover { background: var(--surface-2); text-decoration: none; color: var(--ink); }

.icon-button {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink-2);
  border-radius: 8px;
  height: 32px;
  padding: 0 10px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
}
.icon-button:hover { color: var(--ink); border-color: var(--muted); }

/* --------------------------------------------------------------- hero --- */

.hero { padding: 56px 0 28px; }

.hero h1 {
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
  font-weight: 800;
}
.hero h1 em { font-style: normal; color: var(--s1); }

.hero p.lede {
  font-size: 18px;
  color: var(--ink-2);
  max-width: 62ch;
  margin: 0 0 22px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.pill {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12.5px;
}
.pill strong { color: var(--ink); font-weight: 600; }

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14.5px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}
.button.primary { background: var(--s1); color: #fff; }
.button.primary:hover { filter: brightness(1.08); text-decoration: none; }
.button.ghost { background: var(--surface-1); border-color: var(--border); color: var(--ink); }
.button.ghost:hover { border-color: var(--muted); text-decoration: none; }
.button:disabled { opacity: 0.5; cursor: not-allowed; }

/* -------------------------------------------------------------- cards --- */

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

section { padding: 40px 0; }
section > h2 {
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
section > p.sub { color: var(--ink-2); margin: 0 0 22px; max-width: 68ch; }

/* --------------------------------------------------------- playground --- */

.playground { display: grid; grid-template-columns: 300px 1fr; gap: 18px; align-items: start; }

.controls { display: flex; flex-direction: column; gap: 16px; }

.control-group { display: flex; flex-direction: column; gap: 7px; }
.control-group > label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-weight: 600;
}

select, input[type="text"], textarea {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 14px;
}
select:focus, input:focus, textarea:focus { outline: 2px solid var(--s1); outline-offset: -1px; }

input[type="range"] { width: 100%; accent-color: var(--s1); }

.range-row { display: flex; align-items: center; gap: 10px; }
.range-row output {
  min-width: 34px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  font-size: 13px;
}

.segmented { display: flex; background: var(--surface-2); border-radius: 8px; padding: 3px; gap: 3px; }
.segmented button {
  flex: 1;
  background: none;
  border: none;
  color: var(--ink-2);
  border-radius: 6px;
  padding: 6px 4px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}
.segmented button[aria-pressed="true"] { background: var(--s1); color: #fff; font-weight: 600; }

.hint { font-size: 12px; color: var(--muted); }

/* ------------------------------------------------------------- stage --- */

.stage { display: flex; flex-direction: column; gap: 14px; min-width: 0; }

.stage-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.engine-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 11px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.live { background: var(--good); }
.dot.loading { background: var(--warning); animation: pulse 1.1s ease-in-out infinite; }
.dot.error { background: var(--critical); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.canvas-wrap {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  justify-content: center;
}
canvas { max-width: 100%; height: auto; touch-action: none; cursor: crosshair; }

.overlay-note {
  position: absolute;
  left: 12px;
  bottom: 12px;
  font-size: 12px;
  color: var(--muted);
  background: color-mix(in srgb, var(--surface-1) 85%, transparent);
  padding: 3px 8px;
  border-radius: 6px;
}

.transport { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.transport input[type="range"] { flex: 1; min-width: 120px; }

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}
.metric {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 13px;
}
.metric .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.metric .value {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.metric .value.good { color: var(--good); }
.metric .value.bad { color: var(--critical); }

.log {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: 168px;
  overflow-y: auto;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-2);
}
.log .k { color: var(--muted); }
.log .conflict { color: var(--critical); }
.log .solved { color: var(--good); }
.log .branch { color: var(--s7); }

/* --------------------------------------------------------------- tabs --- */

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tabs button {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 9px 14px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--s1); font-weight: 600; }

.tab-panel[hidden] { display: none; }

/* --------------------------------------------------------------- code --- */

.code-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .code-layout { grid-template-columns: 1fr; } }

textarea.editor {
  min-height: 340px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  background: var(--surface-1);
  tab-size: 4;
}

pre.output {
  margin: 0;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  min-height: 340px;
  max-height: 520px;
  overflow: auto;
  white-space: pre-wrap;
  color: var(--ink-2);
}
pre.output .err { color: var(--critical); }

.snippet {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  overflow-x: auto;
  margin: 0;
}
.snippet .c { color: var(--muted); }
.snippet .kw { color: var(--s7); }
.snippet .s { color: var(--s3); }

/* ---------------------------------------------------------- benchmark --- */

.bench-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.chart-card { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.chart-card h3 { margin: 0 0 2px; font-size: 15px; }
.chart-card p { margin: 0 0 12px; font-size: 12.5px; color: var(--muted); }
.chart-card svg { width: 100%; height: auto; display: block; }

table.results { width: 100%; border-collapse: collapse; font-size: 13px; }
table.results th, table.results td {
  text-align: left;
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
table.results th { color: var(--muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; }
table.results td.fail { color: var(--critical); }

.table-scroll { overflow-x: auto; }

/* ------------------------------------------------------------ gallery --- */

.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.gallery figure {
  margin: 0;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.gallery img { width: 100%; display: block; background: var(--plane); }
.gallery figcaption { padding: 11px 14px; font-size: 13px; color: var(--ink-2); }
.gallery figcaption strong { display: block; color: var(--ink); font-size: 13.5px; }

video.promo {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--plane);
  display: block;
}

/* ------------------------------------------------------------- footer --- */

footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 26px 0 46px;
  color: var(--muted);
  font-size: 13.5px;
}
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
footer nav { margin-left: auto; display: flex; gap: 14px; }

/* ------------------------------------------------------- responsive --- */

@media (max-width: 940px) {
  .playground { grid-template-columns: 1fr; }
  .controls { order: 2; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}