:root {
  --bg: #0f1419;
  --panel: #1a2029;
  --panel-2: #222a35;
  --border: #2c3744;
  --text: #e6edf3;
  --muted: #8b98a8;
  --accent: #4ea1ff;
  --operator: #3ddc91;
  --client: #ffb454;
  --good: #3ddc91;
  --warn: #ffcc66;
  --bad: #ff6b6b;
  --shadow: 0 4px 18px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { font-size: 18px; margin: 0; }
.subtitle { color: var(--muted); font-size: 13px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.badges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge { font-size: 11px; padding: 3px 9px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); }
.badge.on { color: var(--good); border-color: rgba(61,220,145,.4); }
.badge.off { color: var(--muted); }

/* controls */
.controls {
  display: flex; align-items: flex-end; gap: 14px; padding: 14px 22px;
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.ctl { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--muted); }
select {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; font-size: 13px; min-width: 200px;
}
.btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 16px; font-size: 14px; cursor: pointer;
  transition: .15s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: #04263f; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); }
.conn { font-size: 12px; color: var(--muted); margin-left: auto; }
.conn.ok { color: var(--good); }
.conn.bad { color: var(--bad); }

/* layout */
.layout { flex: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 16px 22px; overflow: hidden; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; display: flex; flex-direction: column; overflow: hidden; box-shadow: var(--shadow); }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.panel-head h2 { margin: 0; font-size: 15px; }
.hint { color: var(--muted); font-size: 11px; }

/* transcript */
.transcript { flex: 1; overflow-y: auto; padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.bubble { max-width: 88%; padding: 10px 13px; border-radius: 12px; font-size: 14px; line-height: 1.45; position: relative; }
.bubble .who { font-size: 10px; text-transform: uppercase; letter-spacing: .5px; opacity: .8; margin-bottom: 3px; }
.bubble.operator { align-self: flex-start; background: rgba(61,220,145,.10); border: 1px solid rgba(61,220,145,.35); }
.bubble.operator .who { color: var(--operator); }
.bubble.client { align-self: flex-end; background: rgba(255,180,84,.10); border: 1px solid rgba(255,180,84,.35); }
.bubble.client .who { color: var(--client); }
.bubble.partial { opacity: .7; border-style: dashed; }
.bubble .cursor { display: inline-block; width: 7px; background: currentColor; opacity: .6; margin-left: 2px; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* endpoint row */
.endpoint-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.endpoint-box { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 10px; display: flex; flex-direction: column; gap: 4px; }
.lbl { font-size: 10px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
.intent-val { font-size: 15px; font-weight: 600; color: var(--accent); }
.latency-val { font-size: 18px; font-weight: 700; }
.latency-val.fast { color: var(--good); }
.latency-val.slow { color: var(--warn); }
.flag { font-size: 13px; font-weight: 600; padding: 2px 0; }
.flag-off { color: var(--muted); }
.flag-on { color: var(--good); }
.flag-on::before { content: "✓ "; }

/* suggestions */
.suggestion-list { flex: 1; overflow-y: auto; padding: 14px 18px; display: flex; flex-direction: column; gap: 12px; }
.placeholder { color: var(--muted); font-size: 13px; text-align: center; margin-top: 30px; line-height: 1.5; }
.card {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px; animation: pop .2s ease;
}
@keyframes pop { from { transform: translateY(6px); opacity: 0; } }
.card.main { border-color: rgba(78,161,255,.5); box-shadow: 0 0 0 1px rgba(78,161,255,.15); }
.card.superseded { opacity: .4; }
.card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.tag { font-size: 10px; padding: 2px 8px; border-radius: 999px; background: var(--panel); border: 1px solid var(--border); color: var(--muted); }
.tag.primary { color: var(--accent); border-color: rgba(78,161,255,.4); }
.tag.conf-ok { color: var(--good); border-color: rgba(61,220,145,.4); }
.tag.conf-low { color: var(--warn); border-color: rgba(255,204,102,.4); }
.suggestion-text { font-size: 15px; line-height: 1.5; }
.source {
  margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border);
  font-size: 12px; color: var(--muted);
}
.source .src-id { color: var(--text); font-weight: 600; }
.source .src-answer { margin-top: 4px; font-style: italic; }
.alts { margin-top: 4px; }
.alt { font-size: 12px; color: var(--muted); padding: 6px 0; border-top: 1px solid var(--border); }
.alt .alt-id { color: var(--accent); }

.footer { padding: 8px 22px; border-top: 1px solid var(--border); color: var(--muted); font-size: 11px; }

/* toast */
#toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--panel-2); border: 1px solid var(--border); padding: 10px 16px; border-radius: 10px; font-size: 13px; opacity: 0; transition: .3s; pointer-events: none; box-shadow: var(--shadow); }
#toast.show { opacity: 1; }
#toast.warn { border-color: var(--warn); color: var(--warn); }
#toast.error { border-color: var(--bad); color: var(--bad); }