:root {
  --bg: #f4f5f8;
  --surface: #ffffff;
  --surface-2: #f0f2f6;
  --border: #dfe3ea;
  --text: #1a1d24;
  --muted: #646b78;
  --accent: #3b5bdb;
  --accent-ink: #ffffff;
  --accent-soft: #e7ecff;
  --danger: #d6336c;
  --ok: #2f9e44;
  --mine: #eef3ff;
  --theirs: #f6f3ee;
  --meter-bg: #e6e9ef;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 4px 16px rgb(16 24 40 / 6%);
  --radius: 14px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-2: #1e222b;
    --border: #2a2f3a;
    --text: #e7e9ee;
    --muted: #9198a6;
    --accent: #6d8bff;
    --accent-ink: #0b0d12;
    --accent-soft: #1e2847;
    --danger: #ff6b9a;
    --ok: #51cf66;
    --mine: #18213a;
    --theirs: #262219;
    --meter-bg: #232833;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
h1, h2 { margin: 0; line-height: 1.2; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1rem; font-weight: 650; margin-bottom: .75rem; }
hr { border: 0; border-top: 1px solid var(--border); margin: 1.25rem 0; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--danger); min-height: 1.2em; margin: .5rem 0 0; }

.screen { min-height: 100%; padding: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

/* ---------- Form controls ---------- */
.field { display: grid; gap: 6px; margin: 0 0 16px; border: 0; padding: 0; }
.field > span, .field > legend { font-weight: 600; font-size: .9rem; padding: 0; margin-bottom: 6px; }
input, select {
  font: inherit; color: inherit;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  width: 100%;
}
input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.btn {
  font: inherit; font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: filter .15s, transform .05s;
}
.btn:hover { filter: brightness(.97); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn.ghost { background: transparent; }
.btn.big { width: 100%; padding: 12px; font-size: 1rem; margin-top: 4px; }
.btn[aria-pressed="true"] { background: var(--danger); border-color: var(--danger); color: #fff; }

.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 3px; margin-bottom: 8px; }
.seg button {
  font: inherit; font-size: .9rem; border: 0; background: transparent; color: var(--muted);
  padding: 6px 14px; border-radius: 7px; cursor: pointer;
}
.seg button[aria-checked="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); font-weight: 600; }
.voice-desc { font-size: .82rem; margin: 6px 0 0; min-height: 1.2em; }

input[type="range"] { padding: 0; background: transparent; border: 0; accent-color: var(--accent); height: 24px; }

/* ---------- Login ---------- */
#screen-login { display: grid; place-items: center; }
.login-card { width: 100%; max-width: 440px; }
.brand { display: flex; gap: 14px; align-items: center; margin-bottom: 24px; }
.brand p { margin: 2px 0 0; }
.brand-mark {
  display: grid; place-items: center; flex: none;
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--accent); color: var(--accent-ink); font-size: 1.5rem; font-weight: 700;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  max-width: 1200px; margin: 0 auto 16px;
}
.me { display: flex; gap: 12px; align-items: center; min-width: 0; }
.me > div { display: grid; min-width: 0; }
.me strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.avatar {
  flex: none; display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700;
}
.avatar.big { width: 72px; height: 72px; font-size: 1.6rem; }
.pulse { animation: pulse 1.4s ease-out infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent); }
  100% { box-shadow: 0 0 0 18px transparent; }
}
.call-actions { display: flex; gap: 8px; flex: none; }

/* ---------- Lobby ---------- */
.lobby-grid {
  display: grid; gap: 16px; max-width: 1200px; margin: 0 auto;
  grid-template-columns: minmax(0, 1fr) 340px;
}
.card-head { display: flex; justify-content: space-between; align-items: baseline; }
.pill { background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .8rem; padding: 2px 10px; border-radius: 99px; }
.people { list-style: none; margin: 0; padding: 0; }
.people li {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; border-top: 1px solid var(--border);
}
.people li:first-child { border-top: 0; }
.people .who { flex: 1; min-width: 0; display: grid; }
.people .who strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); display: inline-block; margin-right: 6px; vertical-align: middle; }
.dot.busy { background: #f59f00; }
.empty { text-align: center; padding: 32px 12px; }
.empty p { margin: 4px 0; }

/* ---------- Meters ---------- */
.meter { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; align-items: center; margin-top: 6px; }
.meter-track {
  position: relative; height: 12px; border-radius: 3px; overflow: hidden; background: var(--meter-bg);
}
.meter-peak, .meter-rms {
  position: absolute; inset: 0;
  /* -60..0 dBFS scale: green below -12, amber to -6, red above */
  background: linear-gradient(90deg, #2f9e44 0%, #2f9e44 80%, #f59f00 80%, #f59f00 90%, #e03131 90%);
  clip-path: inset(0 100% 0 0);
}
.meter-peak { opacity: .4; }
.meter-hold { position: absolute; top: 0; bottom: 0; width: 2px; margin-left: -1px; background: var(--text); opacity: 0; }
.meter-hold.clip { background: #e03131; }
.meter-ticks i { position: absolute; top: 0; bottom: 0; width: 1px; background: color-mix(in srgb, var(--bg) 70%, transparent); }
.meter-scale {
  grid-column: 1; display: flex; justify-content: space-between;
  font: 10px/1 var(--mono); color: var(--muted);
}
.meter-val {
  grid-column: 2; grid-row: 1; font: 12px/1 var(--mono); color: var(--muted);
  min-width: 82px; text-align: right; font-variant-numeric: tabular-nums;
}

/* ---------- Call ---------- */
#screen-call { display: flex; flex-direction: column; height: 100dvh; }
#screen-call .topbar { width: 100%; }
.call-grid {
  flex: 1; min-height: 0; width: 100%; max-width: 1200px; margin: 0 auto;
  display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr) 320px;
}
.transcript { display: flex; flex-direction: column; min-height: 0; padding: 0; overflow: hidden; }
.cols-head {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  border-bottom: 1px solid var(--border); background: var(--border);
}
.cols-head > div { background: var(--surface); padding: 12px 16px; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.lang-tag { font-weight: 700; }
.rows { flex: 1; overflow-y: auto; padding: 8px 0; scroll-behavior: smooth; }
.rows-empty { text-align: center; padding: 48px 16px; }
.row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  margin: 6px 12px; border-radius: 10px; overflow: hidden;
  animation: appear .2s ease-out;
}
@keyframes appear { from { opacity: 0; transform: translateY(4px); } }
.row.mine { background: var(--mine); }
.row.theirs { background: var(--theirs); }
.row .cell { padding: 10px 14px; min-width: 0; overflow-wrap: anywhere; }
.row .cell + .cell { border-left: 1px solid var(--border); }
.row .who { display: block; font-size: .75rem; font-weight: 700; color: var(--muted); margin-bottom: 2px; text-transform: uppercase; letter-spacing: .03em; }
.row .cell.src .who::after { content: " · original"; font-weight: 500; text-transform: none; letter-spacing: 0; }
.row .cell.tr .who::after { content: " · translated"; font-weight: 500; text-transform: none; letter-spacing: 0; }
.row .nf { color: var(--muted); }
.row:not(.final) .cell .txt::after { content: "▍"; color: var(--accent); animation: blink 1s steps(2) infinite; margin-left: 1px; }
@keyframes blink { 50% { opacity: 0; } }
.row .cell.tr .txt:empty::before { content: "…"; color: var(--muted); }
.same-lang { padding: 8px 16px; border-top: 1px solid var(--border); margin: 0; }

.mixer { overflow-y: auto; }
.channel { margin-bottom: 18px; }
.channel-head { display: flex; justify-content: space-between; align-items: baseline; font-weight: 600; font-size: .9rem; }
.channel-head output { font: 12px var(--mono); color: var(--muted); }
#call-voice, #lobby-voice { margin-top: 2px; }
.status { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: .85rem; }
.status dt { color: var(--muted); }
.status dd { margin: 0; text-align: right; font-family: var(--mono); font-size: .8rem; }
.status .ok { color: var(--ok); }
.status .bad { color: var(--danger); }

/* ---------- Dialog & toasts ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-items: center; padding: 16px;
  background: rgb(10 12 18 / 55%); backdrop-filter: blur(3px);
}
.dialog { width: 100%; max-width: 360px; text-align: center; display: grid; justify-items: center; gap: 6px; padding: 28px; }
.dialog h2 { margin: 10px 0 0; font-size: 1.25rem; }
.dialog p { margin: 0; }
.dialog-actions { display: flex; gap: 10px; margin-top: 16px; width: 100%; }
.dialog-actions .btn { flex: 1; padding: 12px; }

.toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); display: grid; gap: 8px; z-index: 30; width: min(480px, calc(100% - 32px)); }
.toast {
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 10px;
  box-shadow: var(--shadow); font-size: .9rem; animation: appear .2s ease-out;
}
.toast.err { background: var(--danger); color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .lobby-grid { grid-template-columns: 1fr; }
  #screen-call { height: auto; min-height: 100dvh; }
  .call-grid { grid-template-columns: 1fr; }
  .transcript { min-height: 55dvh; max-height: 70dvh; }
  .row .cell { padding: 8px 10px; font-size: .92rem; }
  .row { margin: 6px 8px; }
}
@media (max-width: 480px) {
  .call-actions .btn { padding: 8px 12px; }
  .cols-head > div { padding: 10px; }
  .cols-head .muted { display: none; }
}