:root {
  color-scheme: dark;
  --bg: #07100f;
  --panel: rgba(14, 26, 24, .78);
  --panel-2: rgba(21, 42, 38, .86);
  --text: #e8fff8;
  --muted: #9fbdb5;
  --accent: #52ffd0;
  --accent-2: #b7fff0;
  --danger: #ff6b8a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0%, rgba(82,255,208,.22), transparent 34rem),
    linear-gradient(160deg, #020505 0%, var(--bg) 48%, #10211f 100%);
}
.app {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 16px 32px;
}
.hero, .composer, .transcript, .debug-panel {
  border: 1px solid rgba(183,255,240,.18);
  background: var(--panel);
  border-radius: 26px;
  box-shadow: 0 24px 90px rgba(0,0,0,.42);
  padding: 22px;
  backdrop-filter: blur(14px);
}
.badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
  border: 1px solid rgba(82,255,208,.35);
  border-radius: 999px;
  padding: 6px 10px;
}
h1 { margin: 14px 0 8px; font-size: clamp(30px, 8vw, 52px); line-height: 1; }
p { color: var(--muted); margin: 0; line-height: 1.65; }
.hint {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  color: #dffdf6;
  background: rgba(82,255,208,.09);
  border: 1px solid rgba(82,255,208,.18);
}
.orb {
  margin: 24px auto 4px;
  width: 138px;
  height: 138px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle, rgba(82,255,208,.44), rgba(82,255,208,.04) 58%, transparent 64%);
  border: 1px solid rgba(82,255,208,.35);
  transition: transform .2s ease, filter .2s ease;
}
.orb span {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 48px var(--accent), inset 0 0 16px #fff;
}
.orb.listening { animation: pulse 1.1s infinite; filter: saturate(1.35); }
.orb.thinking { animation: rotatePulse 1.6s infinite; }
.orb.speaking { animation: speak .28s infinite alternate; }
@keyframes pulse { 50% { transform: scale(1.08); } }
@keyframes rotatePulse { 50% { transform: rotate(3deg) scale(.96); } }
@keyframes speak { to { transform: scale(1.05, .94); } }
.controls, .row { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
button {
  appearance: none;
  border: 1px solid rgba(183,255,240,.2);
  background: var(--panel-2);
  color: var(--text);
  padding: 14px 16px;
  border-radius: 16px;
  font-weight: 700;
  font-size: 16px;
}
button.primary { background: linear-gradient(135deg, #26ffc6, #5ef2ff); color: #001310; }
button:disabled { opacity: .45; }
textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid rgba(183,255,240,.18);
  background: rgba(0,0,0,.24);
  color: var(--text);
  border-radius: 16px;
  padding: 14px;
  font-size: 16px;
}
.composer, .transcript, .debug-panel { margin-top: 14px; }
label { color: var(--muted); }
h2 { margin: 0 0 12px; font-size: 18px; }
h3 { margin: 16px 0 8px; font-size: 15px; color: var(--accent-2); }
.msg { border-left: 3px solid var(--accent); padding: 10px 12px; margin: 10px 0; background: rgba(255,255,255,.04); border-radius: 12px; white-space: pre-wrap; }
.msg.user { border-color: #75a7ff; }
.msg.err { border-color: var(--danger); color: #ffdce4; }
.meta { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.debug-panel {
  border-color: rgba(251, 191, 36, .32);
  background: rgba(13, 22, 28, .86);
}
.debug-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.debug-head h2 { margin: 0; color: #fde68a; }
#debugModeBadge {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: #111827;
  background: #fbbf24;
  padding: 5px 8px;
  border-radius: 999px;
  font-weight: 800;
}
.debug-note { font-size: 13px; margin: 8px 0 12px; }
.debug-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.debug-item {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid rgba(148, 163, 184, .22);
  border-radius: 12px;
  background: rgba(15, 23, 42, .62);
}
.debug-key {
  color: #94a3b8;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.debug-value {
  margin-top: 4px;
  color: #e2e8f0;
  font-size: 12px;
  line-height: 1.35;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.debug-log {
  max-height: 260px;
  overflow: auto;
  border: 1px solid rgba(148, 163, 184, .22);
  border-radius: 14px;
  background: rgba(0,0,0,.24);
  padding: 8px;
}
.debug-event {
  padding: 7px 8px;
  border-bottom: 1px solid rgba(148, 163, 184, .12);
  color: #cbd5e1;
  font-size: 12px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.debug-event span { color: #94a3b8; }
.debug-event b { color: #67e8f9; }
@media (max-width: 560px) {
  .debug-grid { grid-template-columns: 1fr; }
  button { width: 100%; }
}