:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5d6779;
  --border: #e2e6ec;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --danger: #b42318;
  --ok: #067647;
  --warn: #b54708;
  --info: #175cd3;
  --bubble-caller: #eef2f6;
  --bubble-assistant: #e6f4f1;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #171b23;
    --text: #e6e9ef;
    --muted: #98a2b3;
    --border: #2a303c;
    --accent: #2dd4bf;
    --accent-text: #06201d;
    --danger: #f97066;
    --ok: #47cd89;
    --warn: #fdb022;
    --info: #84adff;
    --bubble-caller: #1f2531;
    --bubble-assistant: #15302c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 0 24px; height: 56px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 650; color: var(--text); }
.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar .user { display: flex; align-items: center; gap: 12px; color: var(--muted); }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 22px; margin: 0 0 16px; }
.muted { color: var(--muted); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }

button, .button {
  font: inherit; cursor: pointer;
  border: 1px solid var(--border); border-radius: 8px;
  padding: 7px 14px; background: var(--surface); color: var(--text);
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
input {
  font: inherit; width: 100%;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
}
input:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.login { max-width: 360px; margin: 10vh auto 0; }
.login h1 { text-align: center; }
.login label { display: block; margin-bottom: 14px; font-weight: 500; }
.login input { margin-top: 4px; }
.login button { width: 100%; margin-top: 6px; padding: 9px; }
.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 14px; border: 1px solid var(--danger); color: var(--danger); }

.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar form { display: flex; gap: 8px; }
.toolbar input { width: 220px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--surface); }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tbody tr:hover { background: var(--bg); }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
.empty { padding: 40px; text-align: center; color: var(--muted); }

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid currentColor; }
.badge.completed { color: var(--ok); }
.badge.failed { color: var(--danger); }
.badge.active { color: var(--info); }
.badge.interrupted { color: var(--warn); }

.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; }

.meta { display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; margin: 0; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; font-variant-numeric: tabular-nums; word-break: break-all; }

.transcript { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.turn { max-width: 78%; padding: 10px 14px; border-radius: 12px; }
.turn .who { font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.turn.caller { align-self: flex-start; background: var(--bubble-caller); }
.turn.assistant { align-self: flex-end; background: var(--bubble-assistant); }
.grid-2 { display: grid; grid-template-columns: minmax(260px, 340px) 1fr; gap: 16px; align-items: start; }
@media (max-width: 760px) { .grid-2 { grid-template-columns: 1fr; } .turn { max-width: 92%; } }
.card.flush { padding: 0; overflow: hidden; }
.section-title { margin: 0 0 4px; font-size: 16px; }
.note { margin: 0 0 8px; font-size: 13px; }
.recording { margin-bottom: 16px; }
.recording-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.recording-head .button { margin-left: auto; }
.recording audio { width: 100%; }