:root { font-family: system-ui, sans-serif; color: #1a2b3c; }
body { max-width: 900px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.4rem; } h2 { font-size: 1.1rem; margin-top: 1.5rem; }
.muted { color: #667; font-size: 0.85rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 0.6rem; }
.card { border: 1px solid #cdd; border-radius: 8px; padding: 0.6rem 0.8rem; }
.card .lane { font-weight: 600; font-size: 0.9rem; }
.card .wait { font-size: 1.6rem; font-weight: 700; }
.card .range { font-size: 0.8rem; color: #556; }
.card.closed { opacity: 0.55; }
.card.pre { border-color: #7c6ee6; background: #f6f5ff; }
.badge { display: inline-block; font-size: 0.7rem; padding: 0 0.4rem; border-radius: 4px;
         background: #eef; color: #446; }
.warn { color: #a33; }
form { display: flex; gap: 0.8rem; align-items: end; flex-wrap: wrap; margin-bottom: 0.8rem; }
label { display: flex; flex-direction: column; font-size: 0.8rem; gap: 0.2rem; }
button { padding: 0.4rem 1rem; }
#chart-wrap { margin-top: 1rem; }
#chart-caption { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; align-items: center; }
.key { display: inline-flex; align-items: center; gap: 0.35rem; }
.swatch { width: 14px; height: 10px; border-radius: 2px; display: inline-block; }
.swatch.line-median { height: 2px; background: rgb(60, 80, 200); }
.swatch.band-likely { background: rgba(60, 80, 200, 0.20); }
.swatch.band-p95 { background: rgba(100, 110, 125, 0.16);
                   border-top: 1px dashed rgba(100, 110, 125, 0.85); }