:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2230;
  --ink: #e8edf4;
  --muted: #9aa6b6;
  --line: #2a3140;
  --fire: #ff7a18;
  --fire-2: #ffb648;
  --accent: #4ea1ff;
  --good: #3fb950;
  --radius: 14px;
  --maxw: 1040px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 70% -10%, #1b2230 0%, var(--bg) 55%);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.masthead { padding: 34px 0 22px; }
.brand { font-size: 30px; font-weight: 800; letter-spacing: -0.5px; }
.tagline { color: var(--muted); margin: 6px 0 0; max-width: 60ch; }
.explainer { color: var(--muted); font-size: 13px; margin: 8px 0 0; max-width: 68ch; border-left: 2px solid var(--line); padding-left: 10px; }

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 22px;
  align-items: start;
  padding-bottom: 28px;
}
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.panel h2 { margin: 0 0 16px; font-size: 15px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }

.field { margin-bottom: 14px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.hint { display: block; font-weight: 400; color: var(--muted); font-size: 12px; margin-top: 1px; }

input[type="number"], select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 9px;
  padding: 10px 12px;
  font-size: 16px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.pct { position: relative; }
.pct span { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.pct input { padding-right: 30px; }

.presets { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 16px 0 8px; }
.presets legend { padding: 0 6px; color: var(--muted); font-size: 13px; }
.presets label { display: inline-flex; align-items: center; gap: 5px; font-weight: 500; margin: 4px 12px 4px 0; }
.preset-note { color: var(--muted); font-size: 13px; min-height: 18px; margin: 4px 2px 0; }

.headline { text-align: center; padding: 8px 0 4px; }
.number { font-size: 46px; font-weight: 800; letter-spacing: -1px; background: linear-gradient(90deg, var(--fire), var(--fire-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.number-label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }

.progress-block { margin: 18px 0 10px; }
.progress-track { height: 12px; background: var(--panel-2); border-radius: 99px; overflow: hidden; border: 1px solid var(--line); }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--fire), var(--fire-2)); transition: width .4s ease; }
.progress-meta { color: var(--muted); font-size: 13px; margin-top: 6px; text-align: center; }
.progress-meta span { color: var(--ink); font-weight: 700; }

.when { text-align: center; font-size: 18px; margin: 10px 0 16px; }
.when strong { color: var(--fire-2); }

#chart { width: 100%; height: auto; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; }
.chart-caption { color: var(--muted); font-size: 12px; margin: 0 2px 8px; }

.actions { display: flex; gap: 10px; margin: 18px 0 6px; flex-wrap: wrap; }
button {
  background: linear-gradient(90deg, var(--fire), var(--fire-2));
  color: #20140a; font-weight: 700; border: 0; border-radius: 10px;
  padding: 11px 16px; font-size: 15px; cursor: pointer;
}
button:hover { filter: brightness(1.06); }
button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button.small { padding: 7px 12px; font-size: 13px; }

.assumptions { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
.assumptions summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.assumptions table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14px; }
.assumptions td { padding: 5px 0; border-bottom: 1px solid var(--line); }
.assumptions td:last-child { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink); }
.assumptions td:first-child { color: var(--muted); }

.snapshots { padding: 8px 20px 28px; }
.snapshots h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.snapshots .sub { color: var(--muted); font-size: 13px; margin-top: -6px; }
.snapshot-list { list-style: none; padding: 0; margin: 12px 0; display: grid; gap: 8px; }
.snapshot-list li {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px;
}
.snap-date { color: var(--muted); font-size: 13px; }
.snap-num { font-weight: 700; }
.snap-delta { font-size: 13px; margin-left: 10px; }
.snap-delta.up { color: var(--good); }
.snap-delta.down { color: var(--fire); }

.site-foot { padding: 18px 20px 50px; color: var(--muted); }
.site-foot p { max-width: 70ch; font-size: 13px; }
.site-foot code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; }
.muted { color: var(--muted); }
.assump-foot { color: var(--muted); font-size: 12px; margin: 10px 2px 0; }