:root {
  --bg: #faf6ef;
  --surface: #fffdf7;
  --ink: #2b2520;
  --ink-soft: #6b5f55;
  --accent: #b35422;
  --accent-soft: #e8d6c5;
  --border: #ddd0bf;
  --shadow: 0 1px 0 rgba(43, 37, 32, 0.04), 0 8px 24px -16px rgba(43, 37, 32, 0.18);
  --radius: 14px;
  --user: #2b2520;
  --assistant: #b35422;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Hoefler Text', Georgia, serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

header {
  text-align: center;
  padding: 56px 20px 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface), var(--bg));
}
header h1 {
  margin: 0;
  font-size: 44px;
  font-weight: 500;
  letter-spacing: -0.02em;
}
header .tagline {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 15px;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
  display: grid;
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.card-head h2 { margin: 0; font-size: 20px; font-weight: 500; }

.upload-btn {
  display: inline-block;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
  transition: filter 0.15s;
}
.upload-btn:hover { filter: brightness(1.06); }

select, input[type="number"] {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
select { width: 100%; }
input[type="number"] { width: 80px; margin-left: 8px; }

.book-meta { margin-bottom: 14px; }
.book-meta h2 { margin: 0 0 2px; font-size: 26px; font-weight: 500; letter-spacing: -0.01em; }
.book-meta p { margin: 0; color: var(--ink-soft); font-style: italic; }

.row {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 12px 0;
  margin: 12px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.row label {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  color: var(--ink-soft);
}
.toggle { gap: 8px; cursor: pointer; }
.toggle input { width: 16px; height: 16px; }
.muted { color: var(--ink-soft); font-size: 14px; margin-left: 6px; }

.voice-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.mic-picker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.mic-picker select {
  font-size: 13px;
  padding: 4px 6px;
  max-width: 220px;
}

.mic-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font: inherit;
  font-size: 16px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.05s, filter 0.15s, background 0.15s;
}
.mic-btn:hover:not(:disabled) { filter: brightness(1.06); }
.mic-btn:active:not(:disabled) { transform: translateY(1px); }
.mic-btn:disabled { background: var(--accent-soft); border-color: var(--accent-soft); color: #fff; cursor: not-allowed; }

.mic-btn .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  opacity: 0.5;
}
.mic-btn.listening { background: #c92a2a; border-color: #c92a2a; }
.mic-btn.listening .dot { background: #fff; opacity: 1; animation: pulse 1.2s ease-in-out infinite; }
.mic-btn.connected:not(.listening) .dot { opacity: 1; }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
}

.status {
  font-size: 14px;
  color: var(--ink-soft);
  font-style: italic;
}
.status.error { color: #c92a2a; font-style: normal; }

.transcript {
  margin-top: 18px;
  max-height: 380px;
  overflow-y: auto;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.transcript .empty { color: var(--ink-soft); font-style: italic; text-align: center; margin: 24px 0; }
.turn {
  padding: 8px 14px;
  border-radius: 12px;
  max-width: 85%;
}
.turn.user {
  align-self: flex-end;
  background: var(--accent-soft);
  color: var(--ink);
}
.turn.user .text.bars {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 28px;
  min-width: 56px;
  padding: 2px 0;
}
.turn.user .text.bars span {
  display: inline-block;
  width: 3px;
  min-height: 4px;
  background: var(--accent);
  border-radius: 2px;
  transition: height 60ms linear;
}
.turn.assistant {
  align-self: flex-start;
  background: #f4ece1;
  color: var(--ink);
  border: 1px solid var(--border);
}
.turn .role {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 2px;
}
.turn.assistant .role { color: var(--accent); }

.hidden { display: none !important; }