:root {
  --bg: #0e1116;
  --panel: #161b23;
  --line: #232a35;
  --text: #e4e8ef;
  --muted: #8a93a3;
  --on: #6ee7a8;
  --pin: #f0b26b;
  --expand: #8fb8ff;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 0 20px 64px;
  max-width: 1080px;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.mono, code, pre, output { font-family: var(--mono); }
.muted { color: var(--muted); }
.sep { color: var(--line); padding: 0 4px; }
a { color: var(--expand); }

.cold-start {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 0 -20px 24px;
  padding: 10px 20px;
  background: #2a2213;
  border-bottom: 1px solid #4a3a1c;
  color: #f4d9a8;
  font-size: 13px;
}
.cold-start button {
  margin-left: auto;
  background: none;
  border: 0;
  color: inherit;
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
}

header { padding: 28px 0 20px; }
h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: -0.02em; }
header p { margin: 0 0 8px; max-width: 74ch; }

form { display: grid; gap: 14px; margin-bottom: 26px; }
.field { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
input[type=text] {
  padding: 11px 13px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
}
input[type=text]:focus { outline: 2px solid var(--expand); outline-offset: -1px; }
input[type=range] { width: 100%; accent-color: var(--on); }
output { color: var(--text); font-size: 14px; }

.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.preset {
  padding: 6px 11px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12.5px;
  cursor: pointer;
}
.preset:hover { color: var(--text); border-color: var(--muted); }

.readout { font-size: 19px; margin-bottom: 14px; }
.readout .big { font-family: var(--mono); font-size: 22px; }
.readout .saved { color: var(--on); }
.mode {
  margin-left: 8px;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.bar {
  position: relative;
  height: 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.bar-used { height: 100%; background: linear-gradient(90deg, #2f7f5b, var(--on)); }
.bar-budget {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--pin);
}
.bar-labels {
  display: flex;
  justify-content: space-between;
  margin: 6px 0 22px;
  font-family: var(--mono);
  font-size: 12px;
}

.stages { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 26px; }
.stage-head { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.stage-bar { height: 5px; margin-top: 5px; background: var(--panel); border-radius: 3px; overflow: hidden; }
.stage-bar div { height: 100%; background: var(--expand); }

.group { margin-bottom: 18px; }
.group h3 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 12px;
}
.chip.off { color: #4d5563; border-color: #1b212a; }
.chip.on { color: var(--on); border-color: #2f7f5b; background: #12251d; }
.chip.pinned { color: var(--pin); border-color: #6b4f22; background: #251d10; }
.chip.expanded { color: var(--expand); border-color: #33507f; background: #121a28; }

footer { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 14px; }
footer pre {
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
  overflow-x: auto;
}

@media (max-width: 640px) {
  .stages { grid-template-columns: 1fr; }
  .readout { font-size: 16px; }
  .readout .big { font-size: 18px; }
}