:root {
  --bg: #f4f5fb; --card: #ffffff; --ink: #151827; --muted: #6b7189; --line: #e5e7f0;
  --accent: #6d3df2; --accent-2: #2f6bff; --ok: #12a150; --danger: #e5484d;
  --user: #eef0ff; --agent: #f6f7fb; --shadow: 0 6px 24px rgba(23, 26, 60, .07);
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d0f17; --card: #151826; --ink: #e9ebf5; --muted: #9298b3; --line: #262a3d;
          --user: #24204a; --agent: #1b1f30; --shadow: none; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--ink);
       font: 15px/1.55 Inter, "Noto Sans Bengali", system-ui, sans-serif; }
.wrap { max-width: 640px; margin: 0 auto; padding: 16px 16px 32px; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 6px 2px 16px; }
.brand { font-weight: 600; font-size: 17px; } .logo { color: var(--accent); }
.muted { color: var(--muted); font-weight: 400; }
.langs { font-size: 13px; color: var(--muted); border: 1px solid var(--line); padding: 3px 10px; border-radius: 99px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 20px; margin-bottom: 14px; }

.call { text-align: center; padding: 30px 20px 24px; }
.orb { position: relative; width: 132px; height: 132px; margin: 4px auto 18px; }
.core { position: absolute; inset: 22px; border-radius: 50%; display: grid; place-items: center; color: #fff;
        background: linear-gradient(135deg, var(--accent), var(--accent-2)); transition: transform .25s; }
.ring { position: absolute; inset: 22px; border-radius: 50%; border: 2px solid var(--accent); opacity: 0; }
.orb[data-state="idle"] .core { filter: saturate(.6); }
.orb[data-state="connecting"] .ring { animation: pulse 1.2s infinite; }
.orb[data-state="listening"] .core { transform: scale(calc(1 + var(--lvl, 0) * .25)); }
.orb[data-state="listening"] .ring { opacity: .35; inset: 12px; }
.orb[data-state="thinking"] .ring { animation: spin 1s linear infinite; opacity: 1; border-color: var(--accent) transparent transparent transparent; inset: 10px; border-width: 3px; }
.orb[data-state="speaking"] .ring { animation: pulse 1.1s infinite; }
.orb[data-state="speaking"] .r2 { animation-delay: .55s; }
@keyframes pulse { from { inset: 22px; opacity: .7; } to { inset: -6px; opacity: 0; } }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .ring { animation: none !important; } }

.status { font-size: 19px; font-weight: 600; }
.sub { color: var(--muted); font-size: 14px; margin-top: 2px; }
.timer { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 13px; min-height: 20px; margin-top: 4px; }
.caller { margin: 14px auto 0; max-width: 420px; text-align: left; font-size: 14px; }
.caller summary { cursor: pointer; color: var(--muted); }
.fields { display: grid; gap: 8px; margin-top: 10px; }
input { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); width: 100%; }
input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); border-color: transparent; }

.actions { display: flex; gap: 10px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.btn { font: inherit; font-weight: 600; border: 0; border-radius: 99px; padding: 12px 22px; cursor: pointer;
       display: inline-flex; align-items: center; gap: 8px; }
.call-btn { background: var(--ok); color: #fff; } .call-btn:disabled { opacity: .6; cursor: wait; }
.hang-btn { background: var(--danger); color: #fff; }
.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.ghost.on { background: var(--danger); color: #fff; border-color: var(--danger); }
.meter { height: 4px; background: var(--line); border-radius: 4px; margin: 16px auto 0; max-width: 220px; overflow: hidden; }
#meter { height: 100%; width: 0; background: var(--ok); transition: width .08s; }

.ticket { border-color: color-mix(in srgb, var(--ok) 50%, var(--line)); display: flex; gap: 12px; align-items: center; }
.ticket .tid { font-weight: 700; font-size: 18px; }
.ticket a { color: var(--accent); }

.log-head { display: flex; justify-content: space-between; font-weight: 600; margin-bottom: 10px; font-size: 14px; }
.msgs { display: flex; flex-direction: column; gap: 8px; max-height: 46vh; overflow-y: auto; }
.empty { color: var(--muted); font-size: 14px; text-align: center; padding: 18px 0; }
.msg { max-width: 85%; padding: 9px 13px; border-radius: 14px; font-size: 15px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { align-self: flex-end; background: var(--user); border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--agent); border-bottom-left-radius: 4px; }
.msg.sys { align-self: center; background: none; color: var(--muted); font-size: 13px; padding: 2px; }
.type { display: flex; gap: 8px; margin-top: 12px; }
.foot { text-align: center; font-size: 12px; }