/* ztf-pocket shared style — GitHub-dark, mobile-first */
:root {
  --bg: #0d1117; --panel: #161b22; --border: #30363d;
  --fg: #e6edf3; --dim: #8b949e;
  --blue: #58a6ff; --purple: #a371f7; --pink: #db61a2;
  --green: #3fb950; --gold: #e3b341; --red: #f85149;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica,
        Arial, sans-serif; overscroll-behavior: none; }
a { color: var(--blue); text-decoration: none; }
header.bar { position: sticky; top: 0; z-index: 20; display: flex;
  align-items: baseline; gap: 8px; padding: 10px 14px;
  background: rgba(13,17,23,.92); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border); }
header.bar h1 { font-size: 16px; margin: 0; font-weight: 600; }
header.bar .sub { color: var(--dim); font-size: 12px; }
header.bar a.home { margin-left: auto; font-size: 13px; }
.chips { display: flex; gap: 6px; overflow-x: auto; padding: 8px 12px;
  scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: 0 0 auto; padding: 5px 11px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--panel);
  color: var(--fg); font-size: 12.5px; cursor: pointer; user-select: none; }
.chip.on { border-color: var(--blue); background: #1c2a3f; color: var(--blue); }
.chip.dimmed { opacity: .38; }
.stage { position: relative; }
canvas.plot { display: block; width: 100%; touch-action: none;
  background: var(--bg); }
.hint { position: absolute; left: 10px; bottom: 8px; font-size: 11px;
  color: var(--dim); pointer-events: none;
  background: rgba(13,17,23,.7); padding: 2px 7px; border-radius: 6px; }
.note { color: var(--dim); font-size: 12.5px; padding: 8px 14px 14px; }
.note b { color: var(--fg); }
/* bottom sheet */
.sheet { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  background: var(--panel); border-top: 1px solid var(--border);
  border-radius: 16px 16px 0 0; padding: 12px 16px 20px;
  transform: translateY(105%); transition: transform .22s ease-out;
  box-shadow: 0 -8px 30px rgba(0,0,0,.5); max-height: 62vh; overflow-y: auto; }
.sheet.open { transform: translateY(0); }
.sheet .grab { width: 42px; height: 4px; border-radius: 2px;
  background: var(--border); margin: 0 auto 10px; }
.sheet h2 { margin: 0 0 2px; font-size: 16px; }
.sheet .meta { color: var(--dim); font-size: 12.5px; margin-bottom: 6px; }
.sheet .kv { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 13px;
  margin: 6px 0; }
.sheet .kv span b { color: var(--blue); font-weight: 600; }
.sheet canvas { width: 100%; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg); }
.sheet .close { position: absolute; right: 10px; top: 8px; border: 0;
  background: none; color: var(--dim); font-size: 22px; padding: 4px 8px; }
.votebar { display: flex; height: 14px; border-radius: 4px; overflow: hidden;
  margin: 4px 0 2px; border: 1px solid var(--border); }
.votebar div { height: 100%; }
/* hub cards */
.cards { display: grid; grid-template-columns: 1fr; gap: 12px;
  padding: 14px; max-width: 560px; margin: 0 auto; }
@media (min-width: 640px) { .cards { grid-template-columns: 1fr 1fr; } }
.card { display: block; background: var(--panel); border: 1px solid
  var(--border); border-radius: 12px; padding: 14px 16px; color: var(--fg); }
.card:active { border-color: var(--blue); }
.card .emoji { font-size: 26px; }
.card h2 { margin: 6px 0 4px; font-size: 16px; }
.card p { margin: 0; color: var(--dim); font-size: 13px; }
.hero { text-align: center; padding: 26px 16px 6px; }
.hero h1 { font-size: 22px; margin: 0 0 6px; }
.hero h1 .z { color: var(--blue); }
.hero p { color: var(--dim); font-size: 13.5px; max-width: 520px;
  margin: 0 auto; }
footer { color: var(--dim); font-size: 12px; text-align: center;
  padding: 18px 14px 28px; }
.btnrow { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 12px; }
.btn { padding: 6px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel); color: var(--fg); font-size: 13px; }
.btn.primary { border-color: var(--red); color: var(--red); font-weight: 600; }
.readout { font-size: 13px; color: var(--dim); padding: 2px 14px 6px; }
.readout b { color: var(--gold); font-size: 15px; }