:root {
  --bg: #ffffff;
  --panel: #f7f8fa;
  --text: #1a1d24;
  --muted: #5b6373;
  --accent: #2563eb;
  --accent-rgb: 37, 99, 235;
  --border: #e4e7ec;
  --user-bg: #dde6fb;
  --bot-bg: #eef1f6;
  --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #161922;
    --text: #e7e9ee;
    --muted: #8a93a6;
    --accent: #4f8cff;
    --accent-rgb: 79, 140, 255;
    --border: #232838;
    --user-bg: #2a3553;
    --bot-bg: #1f2433;
    --error: #f87171;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Start overlay ─────────────────────────────────────────────────────────── */
.start-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
}

.start-card {
  max-width: 400px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.start-rings {
  position: relative;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

.ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(var(--accent-rgb), 0.2);
  animation: ring-pulse 2.4s ease-out infinite;
}
.ring-1 { width: 60px;  height: 60px;  animation-delay: 0s; }
.ring-2 { width: 80px;  height: 80px;  animation-delay: 0.6s; }
.ring-3 { width: 100px; height: 100px; animation-delay: 1.2s; }

@keyframes ring-pulse {
  0%   { opacity: 0.7; transform: scale(0.92); }
  100% { opacity: 0;   transform: scale(1.12); }
}

.start-emoji { font-size: 32px; z-index: 1; }

.start-card h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.start-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
  max-width: 320px;
}

.start-note { font-size: 13px !important; }

.start-btn {
  margin-top: 6px;
  padding: 14px 40px;
  border-radius: 50px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
  box-shadow: 0 4px 24px rgba(var(--accent-rgb), 0.4);
  transition: transform 0.15s, box-shadow 0.15s;
}
.start-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(var(--accent-rgb), 0.45); }
.start-btn:active { transform: translateY(0); }

/* ── Main page ─────────────────────────────────────────────────────────────── */
.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.back { display: inline-block; color: var(--accent); text-decoration: none; font-size: 14px; margin-bottom: 8px; }
.back:hover { text-decoration: underline; }
.header h1 { margin: 0 0 4px; font-size: 26px; letter-spacing: -0.01em; }
.subtitle { margin: 0; color: var(--muted); font-size: 15px; }

.warning {
  background: #fff3cd; color: #7a4f00;
  border: 1px solid #ffd772; border-radius: 8px;
  padding: 12px 16px; font-size: 15px;
}
@media (prefers-color-scheme: dark) {
  .warning { background: #332200; color: #ffd772; border-color: #664400; }
}
.hidden { display: none !important; }

/* ── Transcript ────────────────────────────────────────────────────────────── */
.transcript-wrap {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  overflow-y: auto;
  max-height: 38vh;
  min-height: 120px;
}

.transcript { display: flex; flex-direction: column; gap: 14px; }

.turn { display: flex; flex-direction: column; gap: 4px; }

.turn-label {
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted);
}

.bubble {
  padding: 10px 14px; border-radius: 12px;
  font-size: 15px; line-height: 1.55; max-width: 92%;
}
.bubble--user { background: var(--user-bg); align-self: flex-end; border-top-right-radius: 4px; }
.bubble--ashok { background: var(--bot-bg); border-top-left-radius: 4px; }
.bubble--error { color: var(--error); background: transparent; padding-left: 0; }

.typing {
  display: inline-flex; gap: 4px; align-items: center;
  padding: 10px 14px; background: var(--bot-bg);
  border-radius: 12px; border-top-left-radius: 4px;
}
.typing span {
  width: 7px; height: 7px; background: var(--muted);
  border-radius: 50%; animation: blink 1.2s infinite ease-in-out;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.30s; }
@keyframes blink { 0%,80%,100%{opacity:.3} 40%{opacity:1} }

.interim {
  min-height: 22px; font-size: 15px;
  color: var(--muted); font-style: italic; text-align: center;
}

/* ── Waveform ──────────────────────────────────────────────────────────────── */
.waveform-wrap {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}
.waveform-wrap.active { opacity: 1; }

#waveform {
  width: 100%;
  height: 72px;
  display: block;
}

/* ── Mic controls ──────────────────────────────────────────────────────────── */
.controls { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.mic-btn {
  width: 76px; height: 76px;
  border-radius: 50%; border: none;
  background: var(--accent); color: white;
  cursor: pointer; display: flex;
  align-items: center; justify-content: center;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.35);
}
.mic-btn:hover { transform: scale(1.05); }
.mic-btn:active { transform: scale(0.97); }

.mic-btn.recording {
  background: #dc2626;
  animation: pulse-red 1.4s infinite;
}
.mic-btn.processing, .mic-btn.speaking {
  background: var(--muted);
  cursor: default; box-shadow: none;
}
.mic-btn.speaking { background: #16a34a; animation: pulse-green 1.4s infinite; }

@keyframes pulse-red {
  0%   { box-shadow: 0 0 0 0 rgba(220,38,38,.5); }
  70%  { box-shadow: 0 0 0 18px rgba(220,38,38,0); }
  100% { box-shadow: 0 0 0 0 rgba(220,38,38,0); }
}
@keyframes pulse-green {
  0%   { box-shadow: 0 0 0 0 rgba(22,163,74,.5); }
  70%  { box-shadow: 0 0 0 18px rgba(22,163,74,0); }
  100% { box-shadow: 0 0 0 0 rgba(22,163,74,0); }
}

.mic-icon { width: 30px; height: 30px; }
.stop-icon { width: 22px; height: 22px; }

.mic-label { margin: 0; font-size: 14px; color: var(--muted); }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.footer { text-align: center; color: var(--muted); }
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }