:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --border: #e3e2db;
  --text: #0b0b0b;
  --text-sec: #52514e;
  --text-muted: #898781;
  --idle: #b9b8b0;
  --busy: #2a78d6;
  --queued: #d98a00;
  --creating: #8a8a8a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --surface: #1a1a19;
    --border: #2c2c2a;
    --text: #ffffff;
    --text-sec: #c3c2b7;
    --text-muted: #898781;
    --idle: #5c5b55;
    --busy: #3987e5;
    --queued: #e6a020;
    --creating: #6a6a6a;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  padding: 24px 28px 56px;
}

#app {
  max-width: 880px;
  margin: 0 auto;
}

h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}

h2 {
  font-size: 14px;
  font-weight: 600;
  margin: 24px 0 8px;
  color: var(--text-sec);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.subhead {
  color: var(--text-sec);
  font-size: 13px;
  margin: 0 0 16px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.controls label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-sec);
  font-size: 13px;
}

input[type="number"] {
  width: 56px;
  padding: 4px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
}

button {
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

button:hover {
  border-color: var(--busy);
  color: var(--busy);
}

.stats {
  color: var(--text-muted);
  font-size: 13px;
  font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
  margin-bottom: 8px;
}

.pool {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.slot {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--idle);
  border-radius: 8px;
  padding: 10px 12px;
  min-height: 64px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.slot.empty {
  border-left-color: var(--border);
  color: var(--text-muted);
  align-items: center;
  justify-content: center;
}

.slot.creating {
  border-left-color: var(--creating);
}

.slot.idle {
  border-left-color: var(--idle);
}

.slot.busy {
  border-left-color: var(--busy);
}

.slot-id {
  font-weight: 600;
  font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
}

.slot-state {
  color: var(--text-sec);
  font-size: 12px;
}

.bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 2px;
}

.bar-fill {
  display: block;
  height: 100%;
  background: var(--busy);
  transition: width 60ms linear;
}

.queue {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.queue-item {
  background: var(--queued);
  color: #fff;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
}

.empty-hint {
  color: var(--text-muted);
  font-size: 13px;
}

.log {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  max-height: 260px;
  overflow-y: auto;
  font-family: ui-monospace, "Cascadia Code", Menlo, monospace;
  font-size: 12px;
  line-height: 1.6;
}

.log-line {
  color: var(--text-sec);
}

.log-line:first-child {
  color: var(--text);
}