:root {
  --bg: #0b0f14;
  --panel: #121a23;
  --text: #e9edf1;
  --muted: #98a7b8;
  --accent: #28d7ff;
  --accent-2: #8c7dff;
  --border: #223041;
}

body.theme-day {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --text: #0d1b2a;
  --muted: #5a6d82;
  --accent: #0077cc;
  --accent-2: #6d4dff;
  --border: #dbe4ee;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at top right, rgba(40,215,255,.08), transparent 35%), var(--bg);
  color: var(--text);
}

.app-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.app-header h1 { margin: 0; letter-spacing: 2px; }
.app-header p { margin: 4px 0 0; color: var(--muted); }
.header-links { display: flex; flex-wrap: wrap; gap: 12px; }
.header-links a { color: var(--accent); text-decoration: none; font-size: 14px; }

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 18px;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}
.panel h2 { margin-top: 0; }

.panel-title-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.mode-switch { display: flex; gap: 8px; }
.mode-switch button, .toolbar button, .toggle-row button, .actions button, .controls-panel select, .controls-panel input, #themeToggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
}
.mode-switch button.active { border-color: var(--accent); color: var(--accent); }

.toolbar { display: flex; gap: 8px; margin-bottom: 10px; }
textarea#scriptInput {
  width: 100%;
  min-height: 280px;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.08);
  color: var(--text);
  padding: 12px;
  line-height: 1.6;
}
.preview-wrap h3 { margin: 12px 0 8px; font-size: 14px; color: var(--muted); }
.markdown-preview {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 12px;
  min-height: 140px;
}

.controls-panel label { display: block; margin-bottom: 12px; font-size: 14px; color: var(--muted); }
.controls-panel input[type='range'], .controls-panel select { width: 100%; margin-top: 6px; }
.toggle-row, .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.actions { grid-template-columns: 1fr; }
.hint { font-size: 13px; color: var(--muted); }

.prompt-view {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 999;
  overflow: hidden;
}
.prompt-view.hidden { display: none; }
.scroll-track {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.prompt-text {
  position: absolute;
  width: min(92vw, 1100px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 48px;
  line-height: 1.4;
  white-space: normal;
  color: var(--text);
}
.prompt-text h1, .prompt-text h2, .prompt-text h3 { margin: 0.4em 0; }
.karaoke-word {
  color: color-mix(in srgb, var(--text) 62%, #7f93aa 38%);
  transition: color .14s ease, text-shadow .14s ease;
}
.karaoke-word.is-read {
  color: color-mix(in srgb, var(--text) 85%, #5f748d 15%);
}
.karaoke-word.is-active {
  color: var(--accent);
  text-shadow: 0 0 14px color-mix(in srgb, var(--accent) 55%, transparent 45%);
}

.mirror-x .prompt-text { transform: translateX(-50%) scaleX(-1); }
.mirror-y .prompt-text { transform: translateX(-50%) scaleY(-1); }
.mirror-x.mirror-y .prompt-text { transform: translateX(-50%) scale(-1, -1); }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
  .toggle-row { grid-template-columns: 1fr; }
}