/* Dark surface + validated categorical/status steps from the data-viz palette:
   blue #3987e5 (identity/accent), aqua #199e70 (good), yellow #c98500 (warning),
   red #e66767 (critical). Text always wears text tokens, never a series color. */
:root {
  color-scheme: dark;
  --surface-0: #121211;
  --surface-1: #1a1a19;
  --surface-2: #232322;
  --surface-3: #2b2b29;
  --line: #32322f;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #8d8c82;
  --accent: #3987e5;
  --accent-soft: rgba(57, 135, 229, .16);
  --good: #199e70;
  --warn: #c98500;
  --crit: #e66767;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(57,135,229,.12), transparent 60%),
    radial-gradient(700px 420px at 100% 0%, rgba(25,158,112,.08), transparent 55%),
    var(--surface-0);
  color: var(--text-primary);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── top bar ─────────────────────────────────────────────────────────────── */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: rgba(18,18,17,.72);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: .7rem; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  font-weight: 700; font-size: .82rem; letter-spacing: .02em; color: #06101f;
  background: linear-gradient(150deg, #6aa6f0, var(--accent));
}
.brand b { display: block; font-size: .97rem; letter-spacing: -.01em; }
.brand small { color: var(--text-muted); font-size: .78rem; }
.topbar-right { display: flex; align-items: center; gap: .7rem; }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--surface-1); }
.lang-switch button {
  border: 0; border-radius: 0; background: transparent; color: var(--text-muted);
  padding: .3rem .68rem; font-size: .76rem; font-weight: 600; letter-spacing: .03em;
}
.lang-switch button:hover:not(.active) { background: var(--surface-2); color: var(--text-secondary); }
.lang-switch button.active { background: var(--accent); color: #05101e; }
/* ── layout ──────────────────────────────────────────────────────────────── */
.layout {
  max-width: 1440px; margin: 0 auto; padding: clamp(1rem, 2.4vw, 1.75rem);
  display: grid; gap: 1rem;
  grid-template-columns: 330px minmax(0, 1fr) 360px;
  grid-template-rows: auto 1fr;
  grid-template-areas: "call dialogue kb" "metrics dialogue kb";
  align-items: start;
}
.call { grid-area: call; }
.dialogue { grid-area: dialogue; min-height: 68vh; }
.kb { grid-area: kb; }
.metrics { grid-area: metrics; align-self: start; }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 320px minmax(0, 1fr);
            grid-template-areas: "call dialogue" "metrics dialogue" "kb kb"; }
}
@media (max-width: 820px) {
  .layout { grid-template-columns: minmax(0, 1fr);
            grid-template-areas: "call" "dialogue" "kb" "metrics"; }
  .dialogue { min-height: 48vh; }
}

.card {
  background: var(--surface-1); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.15rem;
}
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: .75rem; margin-bottom: .9rem; }
.card-head h2 { font-size: .95rem; font-weight: 600; margin: 0; letter-spacing: -.01em; }
.hint { font-size: .76rem; color: var(--text-muted); }

/* ── call card ───────────────────────────────────────────────────────────── */
.call { display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.orb-wrap { display: flex; flex-direction: column; align-items: center; gap: .55rem; padding-top: .35rem; }
.orb {
  width: 116px; height: 116px; border-radius: 50%; display: grid; place-items: center;
  background: radial-gradient(circle at 34% 28%, #2c3341, #16191f);
  border: 1px solid var(--line);
  transition: box-shadow .25s ease, border-color .25s ease, transform .25s ease;
}
.orb-core {
  width: 54px; height: 54px; border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #4c5566, #232830);
  transition: transform .12s linear, background .25s ease;
}
.orb[data-state="listening"] { border-color: var(--good); box-shadow: 0 0 0 6px rgba(25,158,112,.08), 0 0 34px rgba(25,158,112,.22); }
.orb[data-state="listening"] .orb-core { background: radial-gradient(circle at 40% 35%, #35d19a, var(--good)); }
.orb[data-state="hearing"] { border-color: var(--accent); box-shadow: 0 0 0 6px rgba(57,135,229,.1), 0 0 38px rgba(57,135,229,.3); }
.orb[data-state="hearing"] .orb-core { background: radial-gradient(circle at 40% 35%, #8dbcff, var(--accent)); }
.orb[data-state="thinking"] { border-color: var(--warn); box-shadow: 0 0 0 6px rgba(201,133,0,.1), 0 0 34px rgba(201,133,0,.24); }
.orb[data-state="thinking"] .orb-core { background: radial-gradient(circle at 40% 35%, #f0c164, var(--warn)); animation: pulse 1.1s ease-in-out infinite; }
.orb[data-state="speaking"] { border-color: var(--accent); box-shadow: 0 0 0 8px rgba(57,135,229,.12), 0 0 46px rgba(57,135,229,.42); }
.orb[data-state="speaking"] .orb-core { background: radial-gradient(circle at 40% 35%, #a8ccff, #4d97f0); }
.orb[data-state="error"] { border-color: var(--crit); box-shadow: 0 0 30px rgba(230,103,103,.28); }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.12); } }

.state-label {
  font-size: .74rem; letter-spacing: .09em; text-transform: uppercase;
  color: var(--text-muted);
}
.wave { width: 100%; height: 72px; display: block; }
.wave-legend { display: flex; gap: .9rem; font-size: .72rem; color: var(--text-muted); margin-top: -.55rem; }
.dot { width: 8px; height: 8px; border-radius: 2px; display: inline-block; margin-right: .3rem; vertical-align: middle; }
.dot-user { background: var(--accent); }
.dot-agent { background: var(--good); }

.controls { display: flex; gap: .55rem; width: 100%; }
.controls button { white-space: nowrap; padding-inline: .7rem; }
button {
  font: inherit; font-weight: 600; font-size: .9rem; padding: .62rem 1rem;
  border-radius: 10px; border: 1px solid var(--line); background: var(--surface-2);
  color: var(--text-primary); cursor: pointer; transition: background .15s, border-color .15s, opacity .15s;
}
button:hover:not(:disabled) { background: var(--surface-3); }
button:disabled { opacity: .42; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #05101e; flex: 1; }
button.primary:hover:not(:disabled) { background: #4d97f0; }
button.ghost { flex: 1; }
button.icon { padding: .5rem .7rem; }

.field { width: 100%; }
.field label { display: block; font-size: .76rem; color: var(--text-muted); margin-bottom: .3rem; }
.field-row { display: flex; gap: .4rem; }
select, input[type="text"], .composer input {
  flex: 1; min-width: 0; font: inherit; font-size: .88rem; padding: .5rem .6rem;
  border-radius: 10px; background: var(--surface-2); color: var(--text-primary);
  border: 1px solid var(--line);
}
select:focus, .composer input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.check { display: flex; gap: .5rem; align-items: center; font-size: .78rem; color: var(--text-muted); cursor: pointer; }
.check input { accent-color: var(--accent); }
.status { margin: 0; min-height: 1.3em; font-size: .8rem; color: var(--text-muted); text-align: center; }
.status.error { color: var(--crit); }

/* ── dialogue ────────────────────────────────────────────────────────────── */
.dialogue { display: flex; flex-direction: column; }
.transcript {
  flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: .55rem;
  padding-right: .25rem; max-height: 62vh;
}
.msg {
  padding: .62rem .85rem; border-radius: 13px; max-width: 78%;
  white-space: pre-wrap; font-size: .92rem; animation: rise .18s ease-out;
}
@keyframes rise { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.msg.user { align-self: flex-end; background: var(--accent-soft); border: 1px solid rgba(57,135,229,.4); border-bottom-right-radius: 5px; }
.msg.assistant { align-self: flex-start; background: var(--surface-2); border: 1px solid var(--line); border-bottom-left-radius: 5px; }
.msg.interim { opacity: .55; font-style: italic; }
.msg .src { display: block; margin-top: .4rem; font-size: .72rem; color: var(--text-muted); }
.empty { color: var(--text-muted); font-size: .88rem; margin: auto 0; text-align: center; }
.suggestions { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .85rem; }
.suggestion {
  font-size: .78rem; padding: .38rem .7rem; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface-2); color: var(--text-secondary);
}
.suggestion:hover { border-color: var(--accent); color: var(--text-primary); }
.composer { display: flex; gap: .5rem; margin-top: .9rem; }
.composer button { padding: .5rem 1rem; }

/* ── knowledge base ──────────────────────────────────────────────────────── */
.kb-query {
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 11px;
  padding: .6rem .75rem; margin-bottom: .8rem;
}
.kb-query-label { font-size: .68rem; letter-spacing: .09em; text-transform: uppercase; color: var(--text-muted); }
.kb-query p { margin: .2rem 0 0; font-size: .88rem; color: var(--text-primary); }
.kb-results { display: flex; flex-direction: column; gap: .6rem; }
.kb-card {
  border: 1px solid var(--line); border-radius: 12px; padding: .7rem .8rem;
  background: var(--surface-2); animation: rise .2s ease-out;
}
.kb-card.top { border-color: rgba(57,135,229,.55); background: linear-gradient(180deg, rgba(57,135,229,.09), var(--surface-2)); }
.kb-card-head { display: flex; align-items: center; justify-content: space-between; gap: .5rem; }
.kb-title { font-size: .87rem; font-weight: 600; }
.kb-cat { font-size: .68rem; color: var(--text-muted); border: 1px solid var(--line); border-radius: 999px; padding: .12rem .5rem; white-space: nowrap; }
.kb-score { display: flex; align-items: center; gap: .5rem; margin: .45rem 0 .5rem; }
.meter { flex: 1; height: 6px; border-radius: 3px; background: var(--accent-soft); overflow: hidden; }
.meter > i { display: block; height: 100%; border-radius: 3px; background: var(--accent); transition: width .35s ease; }
.kb-score span { font-size: .74rem; color: var(--text-secondary); font-variant-numeric: tabular-nums; }
.kb-snippet { font-size: .8rem; color: var(--text-secondary); margin: 0; }
.kb-snippet mark { background: rgba(57,135,229,.26); color: var(--text-primary); border-radius: 3px; padding: 0 .1em; }
.kb-used { font-size: .7rem; color: var(--good); margin-top: .45rem; display: inline-flex; align-items: center; gap: .3rem; }
.kb-catalogue { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .9rem; padding-top: .9rem; border-top: 1px solid var(--line); }
.kb-doc {
  font-size: .74rem; color: var(--text-muted); border: 1px solid var(--line);
  background: var(--surface-2); border-radius: 8px; padding: .28rem .55rem;
  transition: color .25s, border-color .25s, background .25s;
}
.kb-doc.hit { color: var(--text-primary); border-color: rgba(57,135,229,.5); background: var(--accent-soft); }

/* ── latency ─────────────────────────────────────────────────────────────── */
.metrics-body { display: flex; flex-direction: column; gap: .85rem; }
.hero { display: flex; align-items: baseline; gap: .35rem; }
.hero-value { font-size: 2.6rem; font-weight: 600; letter-spacing: -.03em; line-height: 1; }
.hero-unit { font-size: 1rem; color: var(--text-secondary); }
.hero-label { font-size: .78rem; color: var(--text-muted); margin-left: .35rem; }
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
.tile { background: var(--surface-2); border: 1px solid var(--line); border-radius: 11px; padding: .55rem .65rem; }
.tile-label { font-size: .72rem; color: var(--text-muted); }
.tile-value { font-size: 1.05rem; font-weight: 600; margin: .1rem 0 .35rem; }
.tile-value small { font-size: .72rem; font-weight: 500; color: var(--text-secondary); margin-left: .12rem; }
.tile .meter { background: var(--surface-3); }