:root {
  --bg: #f4f6f4;
  --panel: #ffffff;
  --ink: #16211a;
  --muted: #5f6b63;
  --line: #e3e8e3;
  --line-strong: #d3dad3;

  --green-900: #14532d;
  --green-700: #1c7a44;
  --green-600: #22a35a;
  --green-500: #2fb46a;
  --green-50: #e9f6ee;

  --red-600: #dc2626;
  --red-700: #b91c1c;

  --amber-500: #d97706;
  --amber-50: #fdf2e2;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 33, 26, .05), 0 8px 24px rgba(16, 33, 26, .04);

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  color: #fff;
  background:
    radial-gradient(120% 180% at 88% -40%, rgba(255,255,255,.16), transparent 60%),
    linear-gradient(105deg, var(--green-700) 0%, var(--green-600) 55%, var(--green-900) 100%);
}
.topbar__title h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.topbar__title p {
  margin: 3px 0 0;
  font-size: 13px;
  color: rgba(255,255,255,.82);
}
.conn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .02em;
  background: rgba(255,255,255,.14);
  color: #fff;
}
.conn__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #fff;
}
.conn--up .conn__dot { background: #b6f5cd; box-shadow: 0 0 0 4px rgba(182,245,205,.25); }
.conn--down .conn__dot { background: #ffd0d0; }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  padding: 20px 28px 40px;
  align-items: start;
}

/* ---------- rail (signature) ---------- */
.rail {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: sticky;
  top: 20px;
}
.rail__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}
.rail__head h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
.count {
  min-width: 22px;
  padding: 2px 8px;
  text-align: center;
  border-radius: 999px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.rail__list { display: flex; flex-direction: column; }
.rail__empty {
  padding: 28px 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.eng {
  text-align: left;
  border: 0;
  background: transparent;
  border-bottom: 1px solid var(--line);
  padding: 14px 18px 14px 16px;
  cursor: pointer;
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 12px;
  align-items: start;
  font-family: inherit;
  border-left: 3px solid transparent;
  transition: background .12s ease, border-color .12s ease;
}
.eng:hover { background: #f7faf8; }
.eng[aria-selected="true"] {
  background: var(--green-50);
  border-left-color: var(--green-600);
}
.eng__pulse {
  margin-top: 5px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--line-strong);
}
.eng--active .eng__pulse {
  background: var(--green-600);
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34,163,90,.45); }
  70% { box-shadow: 0 0 0 8px rgba(34,163,90,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,163,90,0); }
}
.eng__id { font-family: var(--mono); font-size: 12.5px; font-weight: 600; color: var(--ink); }
.eng__meta { margin-top: 3px; font-size: 12px; color: var(--muted); }
.eng__chips { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 10.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 2px 7px; border-radius: 6px; background: #eef1ee; color: var(--muted);
}
.chip--hold { background: var(--amber-50); color: var(--amber-500); }
.chip--rtms { background: var(--green-50); color: var(--green-700); }
.chip--num { font-variant-numeric: tabular-nums; }

/* ---------- detail ---------- */
.detail { min-width: 0; }
.detail__empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; padding: 80px 20px; color: var(--muted);
  background: var(--panel); border: 1px dashed var(--line-strong); border-radius: var(--radius);
}
.detail__empty-mark {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--green-50);
  border: 2px solid var(--green-500);
}
.detail__empty p { margin: 0; font-size: 14px; }

.detail__body { display: flex; flex-direction: column; gap: 20px; }

.grid { display: grid; gap: 16px; }
.grid--2 { grid-template-columns: 1fr 1fr; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.card__head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.card__title {
  margin: 0 0 12px;
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted);
}
.card__head .card__title { margin: 0; }

.kv { margin: 0; display: grid; gap: 10px; }
.kv > div { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.kv dt { color: var(--muted); font-size: 13px; }
.kv__val { margin: 0; font-size: 14px; font-weight: 600; text-align: right; }
.kv__val.mono { font-family: var(--mono); font-size: 12.5px; word-break: break-all; }
.kv__val--yes { color: var(--green-700); }
.kv__val--no { color: var(--muted); }

.controls { display: flex; gap: 10px; }
.btn {
  flex: 1;
  border: 0; border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: inherit; font-size: 13px; font-weight: 700;
  color: #fff; cursor: pointer;
  transition: filter .12s ease, transform .04s ease;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn--start { background: var(--green-600); }
.btn--start:hover:not(:disabled) { filter: brightness(1.05); }
.btn--stop { background: var(--red-600); }
.btn--stop:hover:not(:disabled) { filter: brightness(1.05); }
.rtms-status { margin: 14px 0 0; font-size: 13px; color: var(--ink); font-weight: 600; }
.note { margin: 8px 0 0; font-size: 12px; color: var(--muted); line-height: 1.45; }

/* counters */
.stats { }
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
}
.stat__label {
  display: block;
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted);
}
.stat__num {
  display: block; margin-top: 10px;
  font-size: 42px; font-weight: 800; line-height: 1;
  font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}
.stat__num.bump { animation: bump .35s ease; }
@keyframes bump { 0% { transform: scale(1); color: var(--green-600);} 40% { transform: scale(1.18);} 100% { transform: scale(1);} }

/* hold */
.holdrow { }
.mini {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  text-align: center;
}
.mini__label {
  display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted);
}
.mini__num { display: block; margin-top: 8px; font-size: 28px; font-weight: 800; font-variant-numeric: tabular-nums; }
.mini--onhold { border-color: var(--amber-500); }
.mini--onhold .mini__num { color: var(--amber-500); }

/* transcript */
.card--transcript { padding-bottom: 8px; }
.live-chip {
  font-size: 10.5px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase;
  color: var(--green-700); background: var(--green-50);
  padding: 2px 8px; border-radius: 6px;
  display: inline-flex; align-items: center; gap: 6px;
}
.live-chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green-600); animation: pulse 1.8s infinite; }
.transcript {
  max-height: 340px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
  padding: 4px 2px 12px;
}
.transcript__empty { color: var(--muted); font-size: 13px; font-style: italic; margin: 8px 2px; }
.line { display: grid; grid-template-columns: 76px 1fr; gap: 12px; align-items: baseline; }
.line__who {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  color: var(--green-700); text-align: right;
}
.line__who--consumer { color: var(--muted); }
.line__text { font-size: 14px; line-height: 1.45; }
.line__ts { font-family: var(--mono); font-size: 10px; color: var(--line-strong); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .rail { position: static; }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .stat__num { font-size: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

:focus-visible { outline: 3px solid var(--green-500); outline-offset: 2px; border-radius: 6px; }