/* Bridge view: big, high-contrast, readable at a glance. */
:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #15171a;
  --muted: #6b6f76;
  --border: #d9dce1;
  --ok: #008300;
  --bad: #d92d2b;
  --skip: #6b6f76;
  --state: #008300;  /* set from the current state by navigator.js */
  --state-ink: #006b00;  /* darker shade of --state, readable as text */
  --focus: #0b57d0;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink);
       font: 16px/1.4 "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

.layout { display: grid; grid-template-columns: 210px minmax(0, 1fr); min-height: 100vh; }

.sidebar { background: #1d2733; color: #fff; padding: 1.2rem 1rem; display: flex;
           flex-direction: column; gap: 0.35rem; }
.brand { font-weight: 800; font-size: 1.25rem; margin: 0 0 1rem; letter-spacing: 0.02em; }
.sidebar label { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em;
                 color: #b8c2cc; margin-top: 0.8rem; }
.sidebar select { width: 100%; padding: 0.5rem; font: inherit; border-radius: 6px; border: none; }
#play { margin-top: 1.2rem; padding: 0.7rem; font: inherit; font-size: 1.1rem; font-weight: 700;
        border: none; border-radius: 8px; background: #1f63b5; color: #fff; cursor: pointer; }
#play:hover { background: #174f93; }

main { padding: 1rem 1.2rem 1.5rem; display: flex; flex-direction: column; gap: 0.9rem; min-width: 0; }
h2 { font-size: 1rem; margin: 0 0 0.6rem; text-transform: uppercase; letter-spacing: 0.06em;
     color: var(--muted); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.2rem; }

.clock { display: flex; align-items: center; gap: 1rem; }
#clock { font: 700 1.8rem/1 ui-monospace, "SF Mono", Consolas, monospace; background: var(--panel);
         border: 2px solid var(--ink); border-radius: 8px; padding: 0.35rem 0.9rem; }
#time { flex: 1; accent-color: #3d8bfd; }

.top { display: grid; grid-template-columns: 3fr 2fr; gap: 0.9rem; }

.status { position: relative; border: 3px solid var(--state); text-align: center; }
.status.alarm { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--state) 25%, transparent); } }
.confidence { position: absolute; top: 0.8rem; right: 1rem; font-size: 0.9rem; color: var(--muted); }
.confidence b { display: block; font-size: 1.3rem; color: var(--ink); }
.state { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; color: var(--state-ink);
         margin-top: 0.4rem; letter-spacing: 0.03em; }
.state-line { font-size: 1.15rem; font-weight: 600; margin-bottom: 1rem; }
.solution-line { margin: -0.4rem auto 1rem; padding: 0.45rem 0.8rem; border-radius: 8px;
                 background: #eef3fb; max-width: 46rem; }
.solution-line span { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em;
                      color: var(--muted); margin-right: 0.4rem; }
.solution-line b { font-size: 1.1rem; }
.solution-line small { display: block; color: var(--muted); margin-top: 0.15rem; }
.vitals { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.6rem;
          border-top: 1px solid var(--border); padding-top: 0.8rem; text-align: left; }
.vital span { display: block; font-size: 0.78rem; color: var(--muted); text-transform: uppercase;
              letter-spacing: 0.05em; }
.vital b { font-size: 1.15rem; font-variant-numeric: tabular-nums; }

.instructions { display: flex; flex-direction: column; max-height: 330px; }
.log { list-style: none; margin: 0; padding: 0; overflow-y: auto; }
.log > li { padding: 0.45rem 0 0.45rem 0.7rem; border-left: 4px solid var(--skip); margin-bottom: 0.4rem;
            color: var(--muted); }  /* older entries: muted, still readable (no opacity) */
.log > li.now { color: var(--ink); background: color-mix(in srgb, var(--entry) 8%, transparent); }
.log .when { font: 600 0.9rem ui-monospace, Consolas, monospace; color: var(--muted); }
.log .chip { color: #fff; font-size: 0.75rem; font-weight: 700; border-radius: 4px; padding: 1px 6px;
             margin-left: 0.4rem; }
.log ul { margin: 0.25rem 0 0; padding-left: 1.1rem; }
.log > li.now ul { font-weight: 600; }

.checks-area h2 { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }
.legend { font-size: 0.8rem; text-transform: none; letter-spacing: 0; display: flex; gap: 0.7rem;
          align-items: center; }
.dot { display: inline-block; width: 0.8rem; height: 0.8rem; border-radius: 50%; vertical-align: middle; }
.dot.ok { background: var(--ok); } .dot.bad { background: var(--bad); } .dot.skip { background: var(--skip); }
.checks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-auto-flow: column;
          grid-template-rows: repeat(5, auto); gap: 0.5rem 0.9rem; }
.check { display: flex; justify-content: space-between; align-items: center; gap: 0.6rem;
         padding: 0.55rem 0.8rem; border-radius: 8px; color: #fff; font-weight: 600; }
.check.ok { background: var(--ok); } .check.bad { background: var(--bad); }
.check.skip { background: var(--skip); }
.check .icon { display: inline-block; width: 1.2em; font-weight: 800; }
.check .reading { font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; }

.map-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; }
.map-legend { font-size: 0.85rem; color: var(--muted); }
.map-legend i { display: inline-block; width: 1.2rem; height: 3px; vertical-align: middle; margin: 0 0.3rem 0 0.8rem; }
.map { height: 380px; }
.bottom { display: grid; grid-template-columns: 3fr 2fr; gap: 0.9rem; }
.signal-badge { color: #fff; font-weight: 800; letter-spacing: 0.05em; border-radius: 6px;
                padding: 0.15rem 0.6rem; }
.vitals { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.vital.wide { grid-column: span 2; }
.accuracy { display: grid; grid-template-columns: 1fr 3fr 2.2fr; gap: 1rem; align-items: start; }
.accuracy-now { display: grid; gap: 0.8rem; }
.accuracy-now .vital b { font-size: 1.6rem; }
.acc-chart { height: 240px; }
.acc-table table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.acc-table th, .acc-table td { padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--border); text-align: right; }
.acc-table th:first-child, .acc-table td:first-child { text-align: left; }
.acc-table tr.current { background: #e8f1fc; font-weight: 700; }
.acc-table caption { text-align: left; color: var(--muted); font-size: 0.8rem; padding-bottom: 0.3rem;
                     text-transform: uppercase; letter-spacing: 0.05em; }

.loading { color: var(--muted); margin: 0; }
.error { background: #fde8e8; color: #8a1c1c; border: 2px solid var(--bad); border-radius: 10px;
         padding: 0.8rem 1rem; font-weight: 600; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; align-items: end; gap: 0.5rem 1rem; }
  .sidebar > * { flex: 1 1 140px; }
  .brand { flex-basis: 100%; margin: 0; }
  .top, .checks, .bottom, .accuracy { grid-template-columns: 1fr; }
  .checks { grid-auto-flow: row; grid-template-rows: none; }
  main { padding: 0.8rem; }
  .confidence { position: static; text-align: right; }
  .vitals { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* --- Accessibility -------------------------------------------------------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
           clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 1rem; top: -3rem; z-index: 10; background: #ffffff; color: #15171a;
             padding: 0.5rem 0.9rem; border-radius: 6px; font-weight: 700; }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; box-shadow: 0 0 0 5px #ffffff; }
main:focus { outline: none; }
@media (prefers-reduced-motion: reduce) {
  .status.alarm { animation: none; }
}