:root {
  --bg: #f5f6f8; --surface: #ffffff; --surface-2: #f0f2f5; --border: #dfe3e8;
  --text: #1b1f24; --muted: #667080; --accent: #2f6fed; --accent-ink: #fff;
  --ok: #1a9b5b; --warn: #c77700; --danger: #d23b3b;
  --user: #2f6fed; --user-ink: #fff; --bot: #eef1f5; --bot-ink: #1b1f24;
  --radius: 12px; --shadow: 0 1px 2px rgba(16,24,40,.06), 0 2px 8px rgba(16,24,40,.05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --surface: #171b21; --surface-2: #1f242c; --border: #2b313a;
    --text: #e7eaee; --muted: #98a2b3; --accent: #5b8cff; --accent-ink: #fff;
    --bot: #232932; --bot-ink: #e7eaee; --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 15px/1.5 system-ui, -apple-system, "Segoe UI", "PingFang HK", "Microsoft JhengHei", sans-serif; }
[hidden] { display: none !important; }
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* top bar */
.top { display: flex; align-items: center; gap: 20px; padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); }
.logo { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); position: relative; }
.logo::after { content: ""; position: absolute; inset: 6px 5px; background: linear-gradient(90deg, #fff 0 2px, transparent 2px 4px, #fff 4px 6px, transparent 6px 8px, #fff 8px 10px); border-radius: 1px; }
.top nav { display: flex; gap: 4px; flex: 1; }
.top nav a { padding: 6px 12px; border-radius: 8px; color: var(--muted); }
.top nav a.on { background: var(--surface-2); color: var(--text); }
.me { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 14px; }

main { max-width: 1080px; margin: 0 auto; padding: 24px 16px 60px; }
.head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.head .grow { flex: 1; }

/* controls */
button, .btn { font: inherit; border: 1px solid transparent; border-radius: 9px; padding: 8px 14px; cursor: pointer; background: var(--accent); color: var(--accent-ink); font-weight: 600; }
button:hover { filter: brightness(1.06); }
button:disabled { opacity: .5; cursor: default; }
button.ghost { background: transparent; color: var(--text); border-color: var(--border); font-weight: 500; }
button.danger { background: var(--danger); }
button.ghost.danger { background: transparent; color: var(--danger); border-color: var(--border); }
button.sm { padding: 4px 10px; font-size: 13px; }
input, select, textarea { font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; width: 100%; }
textarea { resize: vertical; min-height: 90px; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); outline-offset: 0; border-color: var(--accent); }
label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; }
label .hint { font-weight: 400; color: var(--muted); }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0 14px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.check input { width: auto; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.stack > * + * { margin-top: 16px; }

/* segmented */
.seg { display: inline-flex; background: var(--surface-2); border-radius: 10px; padding: 3px; gap: 3px; }
.seg label { margin: 0; padding: 7px 14px; border-radius: 8px; cursor: pointer; font-weight: 500; }
.seg input { display: none; }
.seg label:has(input:checked) { background: var(--surface); box-shadow: var(--shadow); color: var(--accent); font-weight: 700; }

/* badges */
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--surface-2); color: var(--muted); }
.badge.out { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.badge.in { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.badge.admin { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }

/* room grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.room { display: flex; flex-direction: column; gap: 6px; cursor: pointer; transition: border-color .15s; color: var(--text); }
.room:hover { border-color: var(--accent); }
.room .name { font-weight: 700; font-size: 16px; }
.empty { text-align: center; padding: 50px 20px; color: var(--muted); }

/* login */
.login { max-width: 360px; margin: 10vh auto 0; }
.login h1 { margin-bottom: 4px; }

/* chat window */
.call { display: flex; flex-direction: column; height: calc(100vh - 190px); min-height: 460px; padding: 0; overflow: hidden; }
.transcript { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 78%; padding: 9px 13px; border-radius: 14px; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: var(--user); color: var(--user-ink); border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: var(--bot); color: var(--bot-ink); border-bottom-left-radius: 4px; }
.msg .meta { display: block; font-size: 11px; opacity: .65; margin-top: 3px; }
.msg.cut::after { content: " （被打斷）"; font-size: 12px; opacity: .6; }
.sys { align-self: center; font-size: 12px; color: var(--muted); background: var(--surface-2); padding: 3px 10px; border-radius: 99px; }
.sys.err { color: var(--danger); }
.controls { border-top: 1px solid var(--border); padding: 14px 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; background: var(--surface); }
.status { display: flex; align-items: center; gap: 8px; min-width: 130px; font-size: 14px; color: var(--muted); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.status[data-s="listening"] .dot { background: var(--ok); }
.status[data-s="user_speaking"] .dot { background: var(--ok); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 25%, transparent); }
.status[data-s="thinking"] .dot { background: var(--warn); animation: pulse 1s infinite; }
.status[data-s="speaking"] .dot { background: var(--accent); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.meter { width: 90px; height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.meter i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .08s; }
.say { flex: 1; display: flex; gap: 8px; min-width: 200px; }
.big { padding: 11px 26px; font-size: 16px; border-radius: 99px; }
.big.stop { background: var(--danger); }
.cfg { font-size: 12px; color: var(--muted); }

/* tables */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; }
td .acts { display: flex; gap: 6px; flex-wrap: wrap; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tabs button { background: none; color: var(--muted); border-radius: 0; border-bottom: 2px solid transparent; font-weight: 600; padding: 8px 14px; }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); }
.section { margin-bottom: 18px; }
.section h2 { display: flex; align-items: center; gap: 10px; }
.section h2 .grow { flex: 1; }
.testout { margin-top: 10px; font-size: 13px; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); white-space: pre-wrap; }
.testout.err { color: var(--danger); }
.savebar { position: sticky; bottom: 0; background: var(--bg); padding: 12px 0; display: flex; gap: 10px; align-items: center; border-top: 1px solid var(--border); }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 18px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.kpi .kv { font-size: 22px; font-weight: 700; margin: 2px 0; font-variant-numeric: tabular-nums; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.scroll { overflow-x: auto; }
details.card summary { cursor: pointer; }
details.card[open] summary { margin-bottom: 8px; }
.grow { flex: 1; }

details.voicebox { margin-top: 16px; border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
details.voicebox summary { cursor: pointer; font-weight: 600; font-size: 14px; }
dialog { overflow-y: auto; }

.costcard { margin-top: 22px; }
.costcard td.best b { color: var(--ok); }
.costcard tr.cur td { background: var(--surface-2); }

.logbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 8px; }
table.logs td { vertical-align: top; }
.logmsg { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; white-space: pre-wrap; word-break: break-word; }
.nowrap { white-space: nowrap; }
.badge.lv.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.badge.lv.error { background: color-mix(in srgb, var(--danger) 18%, transparent); color: var(--danger); }
tr.lv-error td { background: color-mix(in srgb, var(--danger) 6%, transparent); }

/* modal */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 22px; width: min(640px, 94vw); max-height: 90vh; }
dialog::backdrop { background: rgba(10, 14, 20, .45); }
dialog .foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

#toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 9px; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 50; max-width: 90vw; }
#toast.show { opacity: 1; }
#toast.err { background: var(--danger); color: #fff; }

@media (max-width: 640px) {
  .top { flex-wrap: wrap; gap: 10px; padding: 10px 14px; }
  .me span { display: none; }
  .msg { max-width: 90%; }
  .call { height: calc(100vh - 170px); }
}

/* script recording page */
.btns { display: flex; flex-wrap: wrap; gap: 8px; }
.passage { background: var(--surface-2); border-radius: 8px; padding: 10px 12px; line-height: 1.8; font-size: 15px; }
.tablewrap { overflow-x: auto; }
table.script td { vertical-align: top; padding-top: 8px; padding-bottom: 8px; }
table.script td.code { font-family: ui-monospace, monospace; color: var(--muted); white-space: nowrap; }
table.script td.acts { white-space: nowrap; text-align: right; }
table.script td.acts button { margin-left: 4px; }
button.rec { background: var(--danger); color: #fff; border-color: var(--danger); animation: recblink 1s infinite; }
@keyframes recblink { 50% { opacity: .65; } }
@media (max-width: 640px) { table.script td.acts { white-space: normal; } table.script td.acts button { margin: 2px; } }
select.sm { width: auto; padding: 3px 6px; font-size: 13px; }