:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --text: #1d1d1b;
  --muted: #6b6b66;
  --border: #e2e1dc;
  --accent: #2f5bd3;
  --accent-text: #ffffff;
  --user-bg: #eef2fc;
  --danger: #b3261e;
  --rec: #d93025;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --panel: #1f1f1d;
    --text: #ecebe6;
    --muted: #9b9a94;
    --border: #33322f;
    --accent: #7b9cf0;
    --accent-text: #10131c;
    --user-bg: #232a3d;
    --danger: #f2827a;
    --rec: #ff6b5e;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}
h1 { margin: 0; font-size: 22px; letter-spacing: 0.04em; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 24px 0 8px; }
.tagline, .muted { color: var(--muted); font-size: 13px; margin: 2px 0 0; }

#sidebar {
  width: 290px;
  flex-shrink: 0;
  padding: 20px 16px;
  border-right: 1px solid var(--border);
  background: var(--panel);
}
.new { display: flex; flex-direction: column; gap: 8px; margin-top: 20px; }
.field { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; margin-top: 4px; }
select { font: inherit; font-size: 13px; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); color: var(--text); max-width: 100%; }
.actions { display: flex; gap: 4px; flex-shrink: 0; }
#s-model { font-size: 12px; margin-left: 6px; }
.check { font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: flex-start; }

.btn {
  display: inline-block;
  text-align: center;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  font: inherit;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.subtle { border-color: transparent; color: var(--muted); }
.btn.recording { background: var(--rec); color: #fff; border-color: var(--rec); }
.btn:disabled { opacity: 0.5; cursor: default; }

#session-list { list-style: none; padding: 0; margin: 0; }
#session-list li {
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
#session-list li:hover { background: var(--bg); }
#session-list li.active { background: var(--user-bg); }
#session-list .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#session-list .d { color: var(--muted); font-size: 12px; flex-shrink: 0; }

main { flex: 1; min-width: 0; padding: 24px; max-width: 900px; }
.empty { color: var(--muted); max-width: 560px; margin-top: 60px; }
.empty h2 { color: var(--text); font-size: 20px; text-transform: none; letter-spacing: 0; }

.session-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.session-head h2 { color: var(--text); font-size: 20px; text-transform: none; letter-spacing: 0; margin: 0 0 4px; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--border); color: var(--muted); }
.error { color: var(--danger); margin: 12px 0; }
.error button { margin-left: 8px; }
audio { width: 100%; margin: 16px 0 0; }

details {
  margin: 16px 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
}
summary { cursor: pointer; font-weight: 600; }
#transcript { max-height: 360px; overflow: auto; margin-top: 10px; font-size: 14px; white-space: pre-wrap; }
.utt { margin: 0 0 6px; }
.utt .ts { color: var(--muted); font-variant-numeric: tabular-nums; margin-right: 6px; }
.utt .sp { font-weight: 600; margin-right: 4px; }

#chat { display: flex; flex-direction: column; gap: 14px; margin: 16px 0; }
.msg { padding: 12px 16px; border-radius: 10px; background: var(--panel); border: 1px solid var(--border); overflow-x: auto; }
.msg.user { background: var(--user-bg); border-color: transparent; white-space: pre-wrap; }
.msg table { border-collapse: collapse; margin: 8px 0; }
.msg th, .msg td { border: 1px solid var(--border); padding: 4px 8px; text-align: left; vertical-align: top; }
.msg pre { background: var(--bg); padding: 10px; border-radius: 6px; overflow-x: auto; }
.msg h1, .msg h2, .msg h3 { color: var(--text); text-transform: none; letter-spacing: 0; font-size: 16px; margin: 14px 0 6px; }
.msg .label { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { font-size: 13px; padding: 6px 10px; border-radius: 99px; border: 1px solid var(--accent); color: var(--accent); background: transparent; cursor: pointer; text-align: left; }
.chip:hover { background: var(--user-bg); }

#composer { display: flex; gap: 8px; align-items: flex-end; position: sticky; bottom: 0; background: var(--bg); padding: 8px 0 16px; }
textarea {
  flex: 1;
  font: inherit;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  resize: vertical;
}

@media (max-width: 760px) {
  body { flex-direction: column; }
  #sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  main { padding: 16px; }
}