:root {
  --paper: #e7ece8;
  --paper-2: #dde4df;
  --ink: #12201c;
  --ink-soft: #3d4f48;
  --lichen: #6e8f7a;
  --rule: #c3cec7;
  --rust: #c2432b;
  --amber: #e4b04a;
  --monitor: #0e1815;
  --monitor-2: #162420;
  --monitor-text: #cfe0d6;

  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  --sans: -apple-system, "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --gutter: 16px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

main { outline: none; }

/* masthead */
.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px var(--gutter) 14px;
  max-width: 1180px;
  margin: 0 auto;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  width: 12px;
  height: 12px;
  background: var(--ink);
  border-radius: 50% 50% 50% 0;
  transform: translateY(1px);
}

.brand-name {
  font: 700 24px/1 var(--serif);
  letter-spacing: 0.02em;
}

.brand-sub {
  font: 500 13px/1 var(--mono);
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

.masthead-note {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

/* page frame */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px var(--gutter) 56px;
}

h2, h3 {
  font-family: var(--serif);
  margin: 0;
}

.label {
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* start a run */
.start {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 20px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.start h2 { font-size: 22px; }

.start-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  align-items: flex-end;
}

.field { display: grid; gap: 8px; min-width: 0; }

.seg {
  display: inline-flex;
  border: 1px solid var(--ink);
  border-radius: 4px;
  overflow: hidden;
}

.seg input { position: absolute; opacity: 0; pointer-events: none; }

.seg label {
  padding: 8px 16px;
  cursor: pointer;
  font: 500 14px/1 var(--mono);
  user-select: none;
  background: transparent;
}

.seg label + input + label,
.seg label + label { border-left: 1px solid var(--ink); }

.seg input:checked + label { background: var(--ink); color: var(--paper); }
.seg input:focus-visible + label { outline: 2px solid var(--ink); outline-offset: -4px; }

.text-input {
  font: 500 14px/1 var(--mono);
  padding: 9px 10px;
  width: 150px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 4px;
  color: var(--ink);
}

.hint {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  max-width: 62ch;
}

.btn {
  font: 600 15px/1 var(--sans);
  padding: 12px 22px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
}

.btn:hover:not(:disabled) { background: #0a1411; }
.btn:disabled { opacity: 0.5; cursor: progress; }

.btn.quiet {
  background: transparent;
  color: var(--ink);
  padding: 8px 14px;
  font-size: 14px;
}

.btn.quiet:hover:not(:disabled) { background: var(--paper-2); }

.form-error {
  margin: 0;
  color: var(--rust);
  font-size: 14px;
  min-height: 1.4em;
}

/* run list */
.runs-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 36px 0 12px;
}

.runs-head h2 { font-size: 22px; }

.runs {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
}

.run-row {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 4px 14px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  align-items: baseline;
}

.run-row:hover { background: var(--paper-2); }

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lichen);
  align-self: center;
  justify-self: center;
}

.dot.running { background: var(--amber); animation: pulse 1.4s ease-in-out infinite; }
.dot.failed, .dot.interrupted { background: var(--rust); }

@keyframes pulse { 50% { opacity: 0.35; } }

.run-result { font: 600 16px/1.4 var(--serif); }

.run-meta {
  grid-column: 2;
  font: 400 13px/1.5 var(--mono);
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
}

.empty {
  padding: 28px 4px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}

/* run detail */
.crumb {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.crumb a { font-size: 14px; color: var(--ink-soft); }

.detail-title { font-size: 26px; margin: 4px 0 6px; }

.detail-sub {
  font: 400 13px/1.6 var(--mono);
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 900px) {
  .stage { grid-template-columns: minmax(0, 1fr) 340px; align-items: start; }
}

.monitor {
  background: var(--monitor);
  border-radius: 4px;
  padding: 12px;
  color: var(--monitor-text);
}

.monitor-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  font: 500 12px/1.4 var(--mono);
  letter-spacing: 0.08em;
  color: #8fa89b;
  padding: 2px 2px 10px;
}

.monitor canvas {
  display: block;
  width: 100%;
  height: auto;
  background: var(--monitor-2);
  image-rendering: pixelated;
  border-radius: 2px;
}

.controls {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 14px;
  align-items: center;
  margin-top: 12px;
}

.play {
  font: 600 13px/1 var(--mono);
  min-width: 72px;
  padding: 9px 12px;
  background: var(--monitor-text);
  color: var(--monitor);
  border: 0;
  border-radius: 3px;
  cursor: pointer;
}

.scrub { position: relative; padding-bottom: 14px; }

.scrub input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--monitor-text);
  background: transparent;
}

.ticks { position: absolute; left: 0; right: 0; bottom: 0; height: 12px; pointer-events: none; }

.tick {
  position: absolute;
  bottom: 0;
  width: 2px;
  height: 12px;
  background: var(--rust);
  transform: translateX(-1px);
}

.speed {
  grid-column: 1 / -1;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  font: 500 12px/1 var(--mono);
  color: #8fa89b;
}

.speed button {
  font: 500 12px/1 var(--mono);
  background: transparent;
  color: var(--monitor-text);
  border: 1px solid #355045;
  border-radius: 3px;
  padding: 6px 9px;
  cursor: pointer;
}

.speed button[aria-pressed="true"] { background: #355045; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 10px;
  font: 400 12px/1.4 var(--mono);
  color: #8fa89b;
}

/* side panel */
.side { display: grid; gap: 16px; min-width: 0; }

.panel {
  border-top: 1px solid var(--ink);
  padding-top: 10px;
}

.panel h3 { font-size: 17px; margin-bottom: 10px; }

.people { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }

.person {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  gap: 2px 10px;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 8px 8px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.person:hover { background: var(--paper-2); }
.person[aria-pressed="true"] { border-color: var(--ink); background: var(--paper-2); }

.swatch { width: 10px; height: 10px; border-radius: 50%; }
.person-id { font: 600 14px/1.2 var(--mono); }
.person-state { font: 400 12px/1.2 var(--mono); color: var(--ink-soft); }
.person.dead .person-id { text-decoration: line-through; color: var(--ink-soft); }
.person.dead .person-state { color: var(--rust); }

.bars {
  grid-column: 2 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-top: 4px;
}

.bar { display: grid; gap: 2px; font: 400 10px/1 var(--mono); color: var(--ink-soft); }
.bar i { display: block; height: 4px; background: var(--rule); border-radius: 2px; overflow: hidden; }
.bar i b { display: block; height: 100%; background: var(--ink); }
.bar.low i b { background: var(--rust); }

.thought {
  margin: 0;
  padding: 10px 12px;
  background: var(--paper-2);
  border-left: 3px solid var(--lichen);
  font: 500 15px/1.7 var(--serif);
  white-space: pre-wrap;
}

.thought.none { font: 400 14px/1.6 var(--sans); color: var(--ink-soft); border-left-color: var(--rule); }

.log { list-style: none; margin: 0; padding: 0; max-height: 260px; overflow: auto; display: grid; gap: 4px; }
.log li { font: 400 13px/1.5 var(--mono); }
.log li b { color: var(--ink-soft); font-weight: 500; margin-right: 8px; }
.log li.death { color: var(--rust); }
.log-empty { color: var(--ink-soft); font-size: 14px; }

.banner {
  padding: 14px 16px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  margin-bottom: 16px;
}

.banner.running { border-color: var(--amber); background: #f3e9cf; }
.banner.failed { border-color: var(--rust); color: var(--rust); }

@media (max-width: 560px) {
  .masthead-note { display: none; }
  .start { padding: 16px; }
  .text-input { width: 120px; }
}

@media (prefers-reduced-motion: reduce) {
  .dot.running { animation: none; }
}