:root {
  --bg: #0b0f1a; --panel: #131a2b; --panel2: #1b2540;
  --accent: #6c8cff; --accent2: #9b6cff; --ok: #34d399; --warn: #fbbf24; --err: #f87171;
  --text: #e8edf7; --muted: #94a3b8;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2440 0%, var(--bg) 60%) fixed, var(--bg);
  color: var(--text); min-height: 100vh;
}
.app { max-width: 720px; margin: 0 auto; padding: 24px 18px 40px; display: flex; flex-direction: column; min-height: 100vh; }
.head { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; gap: 12px; align-items: center; }
.logo {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  font-weight: 800; font-size: 22px; color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}
h1 { margin: 0; font-size: 20px; }
.sub { margin: 0; color: var(--muted); font-size: 13px; }
.pill { font-size: 13px; padding: 6px 12px; border-radius: 999px; background: var(--panel2); color: var(--muted); }
.pill.ok { background: rgba(52,211,153,.15); color: var(--ok); }
.pill.warn { background: rgba(251,191,36,.15); color: var(--warn); }
.pill.err { background: rgba(248,113,113,.15); color: var(--err); }

.orb-wrap { display: grid; place-items: center; padding: 30px 0 18px; }
.orb {
  width: 200px; height: 200px; border-radius: 50%; display: grid; place-items: center;
  text-align: center; color: var(--text); font-weight: 600; padding: 16px;
  background: radial-gradient(circle at 30% 30%, var(--panel2), var(--panel));
  box-shadow: 0 0 0 1px #2a3550 inset, 0 20px 60px rgba(0,0,0,.4);
  transition: transform .25s, box-shadow .25s;
}
.orb [data-state="listening"] { color: var(--ok); }
.orb:has([data-state="listening"]) { box-shadow: 0 0 0 2px var(--ok) inset, 0 0 60px rgba(52,211,153,.35); animation: pulse 1.6s ease-in-out infinite; }
.orb:has([data-state="thinking"]) { box-shadow: 0 0 0 2px var(--warn) inset, 0 0 60px rgba(251,191,36,.30); }
.orb:has([data-state="speaking"]) { box-shadow: 0 0 0 2px var(--accent) inset, 0 0 70px rgba(108,140,255,.45); animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.05); } }

.log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 8px 4px; }
.line { display: flex; gap: 10px; max-width: 92%; padding: 10px 14px; border-radius: 14px; line-height: 1.4; }
.line .who { font-size: 11px; opacity: .7; text-transform: uppercase; letter-spacing: .04em; }
.line.user { align-self: flex-end; background: linear-gradient(135deg, #2a3a6e, #233056); flex-direction: column; }
.line.bot { align-self: flex-start; background: var(--panel); flex-direction: column; }
.line .txt { font-size: 15px; }

.controls { display: flex; gap: 12px; justify-content: center; padding-top: 14px; }
.btn {
  border: 0; border-radius: 12px; padding: 14px 22px; font-size: 15px; font-weight: 600;
  background: var(--panel2); color: var(--text); cursor: pointer; transition: filter .15s, transform .05s;
}
.btn:hover:not(:disabled) { filter: brightness(1.15); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); }
.btn:disabled { opacity: .45; cursor: default; }
.hint { text-align: center; color: var(--muted); font-size: 12.5px; margin-top: 12px; }
#meterFill { display: none; }