:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #f0efeb;
  --border: #e2e0da;
  --text: #1f2327;
  --muted: #6b6f75;
  --accent: #0f7b6c;
  --accent-soft: #e3f2ef;
  --warn: #b25e09;
  --warn-soft: #fbefdf;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --ok: #18794e;
  --ok-soft: #e6f4ec;
  --agent: #eef3f8;
  --customer: #0f7b6c;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 20, 20, .05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141618; --surface: #1c1f22; --surface-2: #24282c; --border: #2f3438;
    --text: #e8eaec; --muted: #9aa0a6; --accent: #3cb5a3; --accent-soft: #17312d;
    --warn: #f0a44b; --warn-soft: #33281a; --danger: #f2827a; --danger-soft: #3a1f1d;
    --ok: #5cc98f; --ok-soft: #173024; --agent: #23292f; --customer: #1f8f80;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: 'IBM Plex Sans Thai', system-ui, sans-serif; font-size: 15px; line-height: 1.55;
}
h1, h2, h3 { margin: 0 0 .5rem; font-weight: 600; line-height: 1.3; }
h1 { font-size: 1.35rem; } h2 { font-size: 1.1rem; } h3 { font-size: .95rem; }
p { margin: 0 0 .6rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--danger); min-height: 1.2em; }

.topbar {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 1.05rem; }
.brand-mark { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.phase-badge { font-size: .78rem; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.tabs a { padding: 6px 12px; border-radius: 8px; color: var(--muted); text-decoration: none; }
.tabs a:hover { background: var(--surface-2); color: var(--text); }
.tabs a.active { background: var(--accent-soft); color: var(--accent); font-weight: 500; }

.container { max-width: 1280px; margin: 0 auto; padding: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.stack > * + * { margin-top: 12px; }
.grid { display: grid; gap: 14px; }
.grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }

.btn {
  font: inherit; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 7px 14px; border-radius: 9px; cursor: pointer;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.danger { color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.listening { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }

input, textarea, select {
  font: inherit; color: var(--text); background: var(--surface); width: 100%;
  border: 1px solid var(--border); border-radius: 9px; padding: 8px 10px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
label { display: block; font-size: .85rem; color: var(--muted); margin: 8px 0 4px; }
.check { display: flex; gap: 8px; align-items: center; color: var(--text); font-size: .9rem; margin: 4px 0; }
.check input { width: auto; }

.pill { display: inline-block; font-size: .78rem; padding: 1px 8px; border-radius: 99px; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.danger { background: var(--danger-soft); color: var(--danger); }
.pill.accent { background: var(--accent-soft); color: var(--accent); }

/* Talk view */
.talk { display: grid; grid-template-columns: 290px minmax(0, 1fr) 320px; gap: 14px; align-items: start; }
.panel-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; font-size: .9rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; text-align: right; }
.item { padding: 8px 10px; border-radius: 9px; background: var(--surface-2); font-size: .88rem; margin: 6px 0; }
.item.changed { background: var(--ok-soft); }
.total { font-size: 1.4rem; font-weight: 600; }
.countdown { font-variant-numeric: tabular-nums; font-weight: 600; }
.countdown.low { color: var(--warn); }
.countdown.done { color: var(--muted); }

.chat { display: flex; flex-direction: column; height: calc(100vh - 150px); min-height: 520px; }
.messages { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 4px 2px 12px; }
.msg { max-width: 82%; padding: 9px 13px; border-radius: 14px; font-size: .95rem; }
.msg.agent { align-self: flex-start; background: var(--agent); border-bottom-left-radius: 4px; }
.msg.customer { align-self: flex-end; background: var(--customer); color: #fff; border-bottom-right-radius: 4px; }
.msg.system { align-self: center; max-width: 92%; background: transparent; color: var(--muted); font-size: .8rem; text-align: center; padding: 2px 8px; }
.msg .who { display: block; font-size: .72rem; opacity: .75; margin-bottom: 2px; }
.msg .intent { display: block; font-size: .72rem; opacity: .85; margin-top: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chip { font: inherit; font-size: .82rem; border: 1px solid var(--border); background: var(--surface); color: var(--text); padding: 3px 10px; border-radius: 99px; cursor: pointer; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.composer { display: flex; gap: 8px; }
.composer input { flex: 1; }
.closed-banner { padding: 10px 12px; border-radius: 10px; background: var(--surface-2); margin-top: 8px; }

.trace { font-size: .82rem; max-height: calc(100vh - 210px); overflow-y: auto; }
.trace-item { border-left: 3px solid var(--border); padding: 4px 0 4px 10px; margin: 6px 0; }
.trace-item.ok { border-color: var(--ok); }
.trace-item.warn { border-color: var(--warn); }
.trace-item.bad { border-color: var(--danger); }
.trace-item code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .76rem; color: var(--muted); word-break: break-word; }
.section-label { font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 14px 0 4px; }

.scenario-card h3 { margin-bottom: 4px; }
.scenario-card .faults { margin: 10px 0; }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: .82rem; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--surface-2); }
.table-wrap { overflow-x: auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
.stat b { display: block; font-size: 1.4rem; }

.rule-box { border: 1px solid var(--border); border-radius: 10px; padding: 12px; margin-top: 10px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0 14px; }
.notice { padding: 10px 12px; border-radius: 10px; background: var(--warn-soft); color: var(--warn); font-size: .9rem; }
.live-toast { position: fixed; z-index: 20; left: 16px; right: 16px; bottom: 16px; max-width: 720px; margin: auto; }

.login-body { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { width: min(380px, 100%); background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px; }
.login-card .btn { width: 100%; margin-top: 14px; }

@media (max-width: 1100px) {
  .talk { grid-template-columns: 1fr 1fr; }
  .talk .chat-col { grid-column: 1 / -1; order: -1; }
}
@media (max-width: 700px) {
  .container { padding: 16px; }
  .topbar { padding: 10px 16px; }
  .tabs { margin-left: 0; width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .tabs a { white-space: nowrap; }
  .talk { grid-template-columns: 1fr; }
  .chat { height: 70vh; min-height: 420px; }
  .msg { max-width: 92%; }
}

.mt-8 { margin-top: 8px; } .mt-10 { margin-top: 10px; } .mt-14 { margin-top: 14px; }
.text-danger { color: var(--danger); } .text-ok { color: var(--ok); }
.talk.detail-grid { grid-template-columns: minmax(0, 1fr) 320px; }
.messages-limited { max-height: 480px; }
.kv-narrow { max-width: 420px; }
@media (max-width: 700px) { .talk.detail-grid { grid-template-columns: 1fr; } }