:root {
  color-scheme: dark;
  --background: #0b111a;
  --panel: #121b28;
  --panel-strong: #182436;
  --border: #2b3b52;
  --text: #edf4ff;
  --muted: #9fb0c7;
  --accent: #58a6ff;
  --accent-strong: #2787ea;
  --good: #34d399;
  --warning: #fbbf24;
  --danger: #fb7185;
  --radius: 12px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top right, #13243b 0, var(--background) 42rem);
  color: var(--text);
}

button, input, select { font: inherit; }

button, select, input[type="text"], input[type="range"] {
  min-height: 2.65rem;
}

button {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: .65rem 1rem;
  background: var(--panel-strong);
  color: var(--text);
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--accent); }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 50%, transparent); outline-offset: 2px; }
button:disabled { opacity: .48; cursor: not-allowed; }
button.primary { background: var(--accent-strong); border-color: var(--accent); font-weight: 700; }
button.danger { border-color: color-mix(in srgb, var(--danger) 65%, var(--border)); }

.shell { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 1.5rem 0 3rem; }

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(1.55rem, 3vw, 2.25rem); margin-bottom: .35rem; }
h2 { font-size: 1.15rem; margin-bottom: 1rem; }
.subtitle, .hint { color: var(--muted); }
.hint { font-size: .88rem; line-height: 1.45; }

.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.card {
  grid-column: span 6;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: 0 14px 40px rgb(0 0 0 / 18%);
}
.card.full { grid-column: 1 / -1; }
.card.third { grid-column: span 4; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.field { display: grid; gap: .38rem; align-content: start; }
.field.full { grid-column: 1 / -1; }
label { color: var(--muted); font-size: .9rem; }
select, input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .55rem .7rem;
  background: #0d1622;
  color: var(--text);
}

.actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1rem; }
.inline { display: flex; align-items: center; gap: .55rem; flex-wrap: wrap; }
.spaced { margin-top: .75rem; }
.invite-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .6rem; }

.status-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.status-line { display: flex; justify-content: space-between; align-items: center; gap: .7rem; min-height: 2rem; }
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.8rem;
  padding: .22rem .58rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #101925;
  color: var(--muted);
  font-size: .8rem;
  text-align: center;
}
.badge[data-state="good"] { color: var(--good); border-color: color-mix(in srgb, var(--good) 55%, var(--border)); }
.badge[data-state="warning"] { color: var(--warning); border-color: color-mix(in srgb, var(--warning) 55%, var(--border)); }
.badge[data-state="danger"] { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 55%, var(--border)); }

.meter-row { display: grid; grid-template-columns: 8rem minmax(0, 1fr) 6.2rem; align-items: center; gap: .7rem; margin-top: .8rem; }
meter { width: 100%; height: 1.25rem; accent-color: var(--good); }
.level { color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; }

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; }
.stat { padding: .75rem; border-radius: 9px; background: #0d1622; border: 1px solid #223147; }
.stat dt { color: var(--muted); font-size: .78rem; margin-bottom: .25rem; }
.stat dd { margin: 0; font-weight: 650; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.error-panel {
  display: grid;
  gap: .38rem;
  margin-bottom: 1rem;
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--danger) 65%, var(--border));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--danger) 12%, var(--panel));
  color: #ffd9df;
  line-height: 1.45;
}
.error-panel[hidden] { display: none; }

.microphone-button {
  width: 100%;
  min-height: 6.5rem;
  margin-top: 1rem;
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-weight: 800;
  background: color-mix(in srgb, var(--danger) 18%, var(--panel-strong));
  border: 2px solid var(--danger);
}
.microphone-button[data-enabled="true"] {
  background: color-mix(in srgb, var(--good) 20%, var(--panel-strong));
  border-color: var(--good);
}

.diagnostic-log {
  max-height: 20rem;
  overflow: auto;
  margin: .9rem 0 0;
  padding: .8rem;
  border-radius: 8px;
  background: #070c12;
  border: 1px solid #1f2c3e;
  color: #b9c8da;
  white-space: pre-wrap;
  font: .76rem/1.5 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.checkbox-list { display: flex; flex-wrap: wrap; gap: .85rem 1.2rem; }
.checkbox-list label, label.checkbox { display: inline-flex; align-items: center; gap: .45rem; color: var(--text); }
input[type="checkbox"] { inline-size: 1.15rem; block-size: 1.15rem; accent-color: var(--accent); }

.sr-only { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 850px) {
  .card, .card.third { grid-column: 1 / -1; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 1rem, 1180px); padding-top: .8rem; }
  .topbar { display: block; }
  .form-grid, .status-grid, .stats { grid-template-columns: 1fr; }
  .meter-row { grid-template-columns: 1fr; gap: .25rem; }
  .level { text-align: left; }
  .invite-row { grid-template-columns: 1fr; }
}