:root {
  --bg: #0e1116; --panel: #171c24; --line: #262d38;
  --text: #e6edf3; --muted: #8b95a3;
  --z0: #21c07a; --z1: #e6cc00; --z2: #ff8a1e; --z3: #ff4d4d;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
.dim { color: var(--muted); font-weight: 400; }

header { display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; padding: 14px 20px; border-bottom: 1px solid var(--line); }
header h1 { font-size: 18px; margin: 0; font-weight: 600; }
.controls { display: flex; align-items: center; gap: 10px; }
select { background: var(--panel); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; font-size: 14px; }
.status { font-size: 13px; color: var(--muted); }
.status.ok { color: var(--z0); } .status.err { color: var(--z3); }

main { max-width: 1040px; margin: 0 auto; padding: 20px; }
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
@media (max-width: 680px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px;
  transition: border-color .3s, box-shadow .3s; }
.tile .value { font-size: 30px; font-weight: 700; letter-spacing: -0.5px; }
.tile .value small { font-size: 13px; color: var(--muted); font-weight: 500; margin-left: 4px; }
.tile .label { margin-top: 6px; font-size: 13px; color: var(--muted); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700; color: #0e1116; margin-left: 6px; }
.badge.z0 { background: var(--z0); } .badge.z1 { background: var(--z1); }
.badge.z2 { background: var(--z2); } .badge.z3 { background: var(--z3); }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; margin-bottom: 20px; }
.panel h2 { font-size: 13px; font-weight: 600; color: var(--muted); margin: 0 0 12px;
  text-transform: uppercase; letter-spacing: .5px; }
canvas { width: 100%; height: auto; display: block; }
footer { color: var(--muted); font-size: 12px; text-align: center; }

/* --- sleep view --- */
.link { color: var(--accent); text-decoration: none; font-size: 13px; }
.link:hover { text-decoration: underline; }
input[type="text"], input[type="number"], input[type="file"] {
  background: #0e1116; color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 8px; font-size: 13px; }
input[type="number"] { width: 52px; }
button { background: var(--accent); color: #06121e; border: 0; border-radius: 8px;
  padding: 6px 12px; font-size: 13px; font-weight: 600; cursor: pointer; }
button:hover { filter: brightness(1.1); }
.importrow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.importrow .tz { font-size: 12px; color: var(--muted); }
.hint { font-size: 12px; margin: 10px 0 0; }
.controlsbar { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.controlsbar label { font-size: 13px; color: var(--muted); }
.paneltitle { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.paneltitle h2 { margin: 0; }
.nav { display: flex; gap: 8px; }
.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12px; color: var(--muted); }
.legend .sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -2px; margin-right: 4px; }
.legend .sw.dash { height: 3px; border-radius: 0; }
.statsrow { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.stat { background: #0e1116; border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; min-width: 96px; }
.stat .sv { font-size: 20px; font-weight: 700; }
.stat .sl { font-size: 11px; color: var(--muted); margin-top: 2px; }
.stat.z0 { border-color: #21c07a55; } .stat.z1 { border-color: #e6cc0055; }
.stat.z2 { border-color: #ff8a1e77; } .stat.z3 { border-color: #ff4d4d; }