/* Caption Overlay — Phase 10.1 Live Caption
 * Precision Broadcast Subtitle HUD
 */

:root {
  --d3-accent-main: #3b82f6;
  --d3-accent-glow: rgba(59, 130, 246, 0.45);
  --d3-accent-glow-dim: rgba(59, 130, 246, 0.2);
  --d3-accent-light: #93c5fd;
  --d3-accent-light-glow: rgba(147, 197, 253, 0.5);
  --d3-accent-light-glow-dim: rgba(147, 197, 253, 0.25);
}

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

html, body {
  background: transparent;
  overflow: hidden;
  user-select: none;
  -webkit-app-region: no-drag;
  font-family: 'Pretendard Variable', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

#root {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.caption-overlay {
  width: 100%;
  padding: 12px 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none;
}

#lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.caption-line {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.5;
  color: #f4f4f5;
  background: rgba(15, 17, 22, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 6px 18px;
  opacity: 1;
  transition: opacity 0.4s ease-out;
  word-wrap: break-word;
  overflow-wrap: break-word;
  max-width: 90%;
  text-align: center;
}

.caption-line.fading {
  opacity: 0;
}

/* Newest line (bottom) is brightest with accent tint */
.caption-line:last-child {
  color: #ffffff;
  border: 1px solid rgba(59, 130, 246, 0.35);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Oldest lines are dimmer */
.caption-line:first-child {
  opacity: 0.65;
}

.caption-line:nth-child(2) {
  opacity: 0.82;
}

/* Delta (partial/unfinished) line has pulsing cursor */
.caption-line.delta::after {
  content: '\2588';
  animation: blink 0.8s step-end infinite;
  margin-left: 4px;
  color: var(--d3-accent-main);
  opacity: 0.85;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* 로딩 중 표시 — 점멸 애니메이션 */
.caption-line.loading {
  opacity: 0.6;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}