:root {
  --bg: #0a0a0a;
  --text: #e0e0e0;
  --accent: #ff3b30;
  --accent-dim: #ff3b3040;
  --surface: #161616;
  --border: #2a2a2a;
  --muted: #666;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

/* ── SETUP SCREEN ── */
#setup {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

#setup h1 {
  font-family: 'Space Mono', monospace;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

textarea {
  width: 100%;
  max-width: 700px;
  height: 280px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  padding: 1.2rem;
  resize: vertical;
  line-height: 1.7;
  outline: none;
  transition: border-color 0.2s;
}

textarea:focus {
  border-color: var(--accent);
}

textarea::placeholder {
  color: var(--muted);
}

.mode-select {
  display: flex;
  gap: 0;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.mode-select label {
  padding: 0.7rem 1.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  border-right: 1px solid var(--border);
  user-select: none;
  color: var(--muted);
}

.mode-select label:last-child { border-right: none; }

.mode-select input { display: none; }

.mode-select input:checked + label {
  background: var(--accent);
  color: #fff;
}

button#start {
  margin-top: 1.5rem;
  padding: 0.8rem 3rem;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

button#start:hover {
  background: var(--accent);
  color: #fff;
}

button#start:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.chrome-warning {
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  font-size: 0.75rem;
  color: #f5a623;
  border: 1px solid #f5a62350;
  border-radius: 4px;
  background: #f5a62310;
  max-width: 700px;
  text-align: center;
  letter-spacing: 0.02em;
}

/* ── PROMPTER SCREEN ── */
#prompter {
  display: none;
  flex-direction: column;
  height: 100vh;
  position: relative;
}

#prompter.active {
  display: flex;
}

.scroll-region {
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Fade masks at top/bottom */
.scroll-region::before,
.scroll-region::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 120px;
  z-index: 2;
  pointer-events: none;
}

.scroll-region::before {
  top: 0;
  background: linear-gradient(to bottom, var(--bg), transparent);
}

.scroll-region::after {
  bottom: 0;
  background: linear-gradient(to top, var(--bg), transparent);
}

#text-display {
  padding: 50vh 2rem 50vh 2rem;
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.8;
  font-size: 2.5rem;
  transition: font-size 0.15s ease;
  position: relative;
  white-space: pre-wrap;
}

/* Fixed mode: word-level highlight (respects text wrapping) */
#text-display .fw {
  color: #444;
  transition: color 0.15s ease;
}

#text-display .fw.active {
  color: #fff;
}

#text-display .line {
  color: #444;
}

/* Audio mode: word-by-word spans */
#text-display .word {
  transition: color 0.15s, opacity 0.15s;
  color: #444;
  opacity: 1;
}

#text-display .word.spoken {
  color: #fff;
}

#text-display .word.current {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 6px;
}

#text-display .word.upcoming {
  color: #444;
}

/* Center line indicator */
.center-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-dim);
  z-index: 1;
  pointer-events: none;
  display: none;
}

.center-line.visible { display: block; }

/* ── CONTROLS BARS ── */
.controls {
  position: fixed;
  left: 0; right: 0;
  background: var(--surface);
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  z-index: 10;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.controls-top {
  top: 0;
  border-bottom: 1px solid var(--border);
  justify-content: flex-end;
}

.controls-bottom {
  bottom: 0;
  border-top: 1px solid var(--border);
}

.controls .ctrl-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.controls input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

#sizeSlider { width: 100px; }
#speedSlider { width: 100px; }

.controls button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}

.controls button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.mic-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
}

.mic-indicator.live {
  background: var(--accent);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-dim); }
  50% { box-shadow: 0 0 0 6px transparent; }
}