:root {
  --bg: #0f1419;
  --panel: #1a212b;
  --panel-border: #2a3441;
  --text: #e6edf3;
  --muted: #9aa7b4;
  --accent: #4cc2ff;
  --accent-press: #2aa3e0;
  --early: #4cc2ff;
  --late: #f85149;
  --slow: #3fb950;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header, main, footer {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}
header { padding-top: 32px; }

h1 { margin: 0 0 8px; font-size: 1.9rem; }
.subtitle { color: var(--muted); max-width: 80ch; }
.subtitle a { color: var(--accent); }

.repo-link { margin: 6px 0 0; font-size: 0.85rem; }
.repo-link a { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); text-decoration: none; }
.repo-link a:hover { color: var(--accent); }
.repo-link svg { display: block; }

.data-note {
  margin-top: 12px; padding: 8px 12px; border-radius: 8px;
  background: #3a2f12; color: #e3c06b; font-size: 0.85rem; max-width: 80ch;
}

.status {
  display: inline-block; margin-top: 8px; padding: 6px 12px;
  border-radius: 999px; font-size: 0.85rem; font-weight: 600;
}
.status--loading { background: #3a2f12; color: #d29922; }
.status--ready   { background: #12331c; color: #3fb950; }
.status--busy    { background: #12283a; color: var(--accent); }
.status--error   { background: #3a1414; color: #f85149; }

main {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  margin-top: 24px;
}
.panel--wide { grid-column: 1 / -1; }
@media (max-width: 860px) { main { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 20px;
}
.panel h2 { margin-top: 0; font-size: 1.1rem; }

.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; margin: 4px 0 0; }

select, input[type="range"] { width: 100%; }
select {
  background: #0f1620; border: 1px solid var(--panel-border); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 0.95rem;
}
input[type="range"] { accent-color: var(--accent); }
#weeks-out { font-variant-numeric: tabular-nums; color: var(--accent); }

.btn {
  font: inherit; font-weight: 600; border-radius: 8px; padding: 9px 16px;
  cursor: pointer; border: 1px solid transparent; transition: background .15s, opacity .15s;
}
.btn--primary { background: var(--accent); color: #04121c; width: 100%; }
.btn--primary:hover:not(:disabled) { background: var(--accent-press); }
.btn--primary:disabled { opacity: .5; cursor: not-allowed; }

.hint { color: var(--muted); font-style: italic; }

.chart-wrap { width: 100%; overflow-x: auto; }
#chart { width: 100%; height: auto; border-radius: 8px; background: #fff; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: right; padding: 8px 10px; border-bottom: 1px solid var(--panel-border); }
th:first-child, td:first-child, th:nth-child(2), td:nth-child(2) { text-align: left; }
thead th { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: .03em; }
tr.best td { background: #12283a; }

.pill { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.pill--early { background: rgba(76,194,255,.16); color: var(--early); }
.pill--late  { background: rgba(248,81,73,.16);  color: var(--late); }
.pill--slow  { background: rgba(63,185,80,.16);  color: var(--slow); }

.takeaway {
  margin-top: 16px; padding: 12px 14px; background: #0f1620;
  border-left: 3px solid var(--accent); border-radius: 6px; font-size: 0.95rem;
}

footer { padding: 24px 20px 40px; color: var(--muted); font-size: 0.85rem; }
footer code { color: var(--accent); }