:root {
  --bg: #0f1419;
  --panel: #1a212b;
  --panel-border: #2a3441;
  --surface: #0f1620;        /* chart surface */
  --grid: #1e2936;           /* one step off the surface */
  --text: #e6edf3;
  --muted: #9aa7b4;
  --accent: #4cc2ff;
  --warn: #d29922;
  --bad: #f85149;
  --good: #3fb950;
  /* categorical slots, dark-surface steps (validated) */
  --s-surplus: #3987e5;
  --s-balance: #d95926;
  --s-deficit: #199e70;
}

* { 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: 1180px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 32px; }
footer { margin: 40px auto 48px; color: var(--muted); font-size: 0.85rem; }
footer a { color: var(--accent); }

h1 { margin: 0 0 8px; font-size: 1.85rem; }
.subtitle { color: var(--muted); max-width: 95ch; }
.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; }

.note {
  margin: 16px 0 0; padding: 14px 18px; max-width: 95ch;
  border-left: 3px solid var(--warn); border-radius: 0 10px 10px 0;
  background: #1f1a10; color: #e6d8b8; font-size: 0.92rem;
}

main { margin-top: 24px; display: flex; flex-direction: column; gap: 20px; }

.panel {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 12px; padding: 20px;
}
.panel h2 { margin: 0 0 6px; font-size: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
code { color: var(--accent); background: #0f1620; padding: 0 4px; border-radius: 4px; }
.method { padding-left: 20px; }
.method li { margin-bottom: 6px; }
.method a { color: var(--accent); }

.controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin: 14px 0; }
.field { margin: 0; }
.field.grow { flex: 1; min-width: 260px; }
.field label { display: block; font-size: 0.82rem; font-weight: 600; margin-bottom: 6px; }
input[type="number"], select {
  background: #0f1620; border: 1px solid var(--panel-border); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 0.95rem; width: 140px;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }
output { font-variant-numeric: tabular-nums; color: var(--accent); font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 6px 0 4px; }
.stat { background: #0f1620; border: 1px solid var(--panel-border); border-radius: 10px; padding: 11px 13px; }
.stat .v { font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .l { color: var(--muted); font-size: 0.76rem; margin-top: 2px; }

/* animation bar */
.anim-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 14px 0 8px; }
.anim-bar > * { flex: none; }
.btn {
  font: inherit; font-weight: 600; padding: 8px 16px; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: #04121c; border: 1px solid var(--accent);
}
.btn--ghost { background: transparent; color: var(--text); border-color: var(--panel-border); }
.btn--ghost:hover { border-color: var(--accent); }
.speed { font-size: 0.85rem; color: var(--muted); }
.speed select { width: auto; margin-left: 6px; }
.scrub { flex: 1 1 220px; min-width: 220px; }
/* Fixed box: its text changes every week and must never resize or re-wrap the
   slider while the user is dragging it. */
.when { width: 290px; height: 46px; text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; }
@media (max-width: 700px) { .when { width: 100%; text-align: left; } }
.when #when-date { display: block; font-weight: 700; font-size: 1.05rem; }
.when .badge { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; font-size: 0.72rem; font-weight: 700; }
.badge--div { background: #3a2f12; color: var(--warn); }
.badge--day { background: #12331c; color: var(--good); }

/* legends */
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 8px 0 10px; font-size: 0.82rem; color: var(--muted); }
.legend .k { display: inline-flex; align-items: center; gap: 7px; }
.legend .sw { width: 14px; height: 10px; border-radius: 2px; display: inline-block; }
.legend .ln { width: 22px; height: 0; border-top: 2px solid; display: inline-block; }
.legend .ln.dash { border-top-style: dashed; }
.legend .hatch { background: repeating-linear-gradient(135deg, currentColor 0 2px, transparent 2px 5px); opacity: .8; }

/* six-panel grid */
.grid6 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .grid6 { grid-template-columns: 1fr; } }
.cell { background: var(--surface); border: 1px solid var(--panel-border); border-radius: 10px; padding: 10px 10px 6px; }
.cell h3 { margin: 0; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; }
.cell h3 .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.cell .sub { font-size: 0.76rem; color: var(--muted); margin: 2px 0 6px; height: 1.2em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cell canvas { width: 100%; height: auto; display: block; border-radius: 6px; }
.cell .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-top: 6px; font-size: 0.74rem; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; }
.cell .stats b { display: block; color: var(--text); font-size: 0.95rem; }
.cell .snapline { font-size: 0.78rem; margin-top: 6px; color: var(--muted); height: 1.3em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cell .snapline b { color: var(--text); }

.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; } }
.chart-wrap { width: 100%; }
.chart-wrap canvas { width: 100%; height: auto; display: block; border-radius: 8px; background: var(--surface); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--panel-border); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-weight: 600; font-size: 0.78rem; }
td .dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 7px; vertical-align: middle; }
td.up { color: var(--good); } td.down { color: var(--bad); }

.tip {
  position: fixed; z-index: 10; pointer-events: none;
  background: #0b1118; border: 1px solid var(--panel-border); border-radius: 8px;
  padding: 8px 10px; font-size: 0.78rem; color: var(--text); font-variant-numeric: tabular-nums;
  box-shadow: 0 6px 20px rgba(0,0,0,.45); max-width: 280px;
}
.tip .t { color: var(--muted); margin-bottom: 4px; }
.tip .row { display: flex; justify-content: space-between; gap: 14px; }
.tip .row .k { display: inline-flex; align-items: center; gap: 6px; }
.tip .sw { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }