/* ============================================================
   志愿心动仪 — 前置摄像头 rPPG 版样式
   手机优先设计
   ============================================================ */

:root {
  --bg: #0f0f23;
  --bg-card: #1a1a2e;
  --bg-card2: #16213e;
  --accent: #00ff64;
  --accent2: #ff4444;
  --text: #e0e0e0;
  --text2: #a0a0b0;
  --border: #2a2a4a;
  --warning: #ffaa44;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================================
   屏幕通用
   ============================================================ */
.screen { display: none; min-height: 100vh; padding: 16px; }
.screen.active { display: block; }

.btn {
  display: inline-block; padding: 10px 20px;
  border: none; border-radius: 8px;
  font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover:not(:disabled) { background: #00cc50; }
.btn-secondary { background: var(--bg-card2); color: var(--accent); border: 1px solid var(--accent); }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-large { padding: 14px 32px; font-size: 18px; width: 100%; margin-top: 16px; }
.small-note { font-size: 12px; color: var(--text2); margin-top: 8px; }

/* ============================================================
   欢迎页
   ============================================================ */
.welcome-container {
  max-width: 420px; margin: 0 auto; padding-top: 15vh;
  text-align: center;
}
.logo-icon { font-size: 64px; margin-bottom: 12px; }
.welcome-container h1 { font-size: 28px; color: var(--accent); margin-bottom: 8px; }
.subtitle { color: var(--text2); font-size: 14px; margin-bottom: 32px; }
.intro-text { text-align: left; margin: 24px 0; }
.intro-text p { margin: 8px 0; font-size: 14px; line-height: 1.6; }
.privacy-note { font-size: 12px; color: var(--text2); margin-top: 24px; }

/* ============================================================
   设置页
   ============================================================ */
.setup-container { max-width: 420px; margin: 0 auto; padding-top: 24px; }
.setup-container h2 { font-size: 20px; color: var(--accent); margin-bottom: 16px; }
.status-text { font-size: 13px; color: var(--text2); margin: 8px 0; }

.setup-camera-section {
  background: var(--bg-card); border-radius: 12px;
  padding: 16px; margin-bottom: 20px;
}

.face-guide { margin-top: 12px; }
.face-guide-header {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 8px;
}
.face-guide-hint { font-size: 12px; color: var(--text2); }

/* 信号指示灯 */
.signal-dot {
  width: 10px; height: 10px; border-radius: 50%;
  display: inline-block; flex-shrink: 0;
}
.signal-none { background: #666; }
.signal-bad { background: #ff4444; box-shadow: 0 0 6px #ff4444; }
.signal-weak { background: var(--warning); box-shadow: 0 0 6px var(--warning); }
.signal-good { background: var(--accent); box-shadow: 0 0 8px var(--accent); }

.setup-majors-section { margin-top: 20px; }
.setup-majors-section h3 { font-size: 16px; margin-bottom: 8px; }

.custom-major-input-area { margin-bottom: 16px; }
.custom-input-row { display: flex; gap: 8px; }
.custom-major-input {
  flex: 1; padding: 8px 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 14px;
}
.custom-major-input:focus { outline: none; border-color: var(--accent); }
.custom-input-hint { font-size: 11px; color: var(--text2); margin-top: 4px; }

.major-list {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px; margin-bottom: 16px;
}
.major-card {
  background: var(--bg-card); border-radius: 10px;
  padding: 10px; cursor: pointer; position: relative;
  border: 2px solid transparent; transition: all 0.2s;
}
.major-card.active { border-color: var(--accent); }
.major-card .card-emoji { font-size: 24px; }
.major-card .card-name { font-size: 13px; margin-top: 4px; }
.major-card .card-delete {
  position: absolute; top: 4px; right: 6px;
  font-size: 14px; color: var(--text2); cursor: pointer;
  display: none;
}
.major-card:hover .card-delete { display: block; }

.baseline-note {
  background: var(--bg-card); border-radius: 10px;
  padding: 12px; margin: 16px 0; font-size: 13px;
}
.baseline-note p { margin: 4px 0; }

/* ============================================================
   基线测量页
   ============================================================ */
.baseline-container { max-width: 420px; margin: 0 auto; padding-top: 10vh; text-align: center; }
.baseline-container h2 { font-size: 20px; color: var(--accent); margin-bottom: 12px; }

.face-status-bar {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin: 12px 0; font-size: 14px;
}

.current-bpm-display {
  font-size: 16px; margin: 16px 0;
  padding: 12px; background: var(--bg-card);
  border-radius: 10px;
}
#bpm-display { font-size: 32px; font-weight: bold; color: var(--accent); }
.confidence-text { font-size: 13px; color: var(--text2); }

.baseline-chart-area { margin: 16px 0; }
.baseline-chart-area canvas {
  width: 100% !important; height: 200px !important;
}

.baseline-progress {
  display: flex; align-items: center; gap: 8px;
  margin-top: 12px; font-size: 14px;
}
.progress-bar { flex: 1; height: 6px; }

.face-reminder { font-size: 13px; color: var(--text2); margin-top: 16px; }

/* ============================================================
   专业展示页
   ============================================================ */
.photos-container { max-width: 420px; margin: 0 auto; padding-top: 12px; }

.realtime-hr-panel {
  text-align: center; margin-bottom: 12px;
  padding: 12px; background: var(--bg-card);
  border-radius: 12px;
}
.realtime-bpm { display: flex; align-items: baseline; justify-content: center; gap: 4px; }
.bpm-number { font-size: 48px; font-weight: bold; color: var(--accent2); }
.bpm-label { font-size: 16px; color: var(--text2); }
.realtime-confidence { font-size: 13px; color: var(--text2); margin-top: 4px; }

.photo-display-area { margin: 12px 0; }
.photo-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px; font-size: 14px;
}
.photo-name { font-weight: 600; }
.photo-emoji { font-size: 20px; }

.photo-frame {
  width: 100%; aspect-ratio: 3/2;
  background: var(--bg-card); border-radius: 10px;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }

.photo-timer-bar {
  display: flex; align-items: center; gap: 8px;
  margin-top: 8px; font-size: 13px;
}

.face-reminder { font-size: 12px; color: var(--text2); text-align: center; margin-top: 12px; }

/* ============================================================
   报告页
   ============================================================ */
.result-container { max-width: 420px; margin: 0 auto; padding-top: 24px; }
.result-container h2 { font-size: 20px; color: var(--accent); margin-bottom: 16px; text-align: center; }
.result-chart-area { margin: 16px 0; }
.result-chart-area canvas { width: 100% !important; }

.heartbeat-index-cards { display: grid; gap: 8px; margin: 16px 0; }
.heartbeat-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border-radius: 10px; padding: 12px;
}
.heartbeat-card .card-rank { font-size: 18px; font-weight: bold; color: var(--accent); width: 24px; }
.heartbeat-card .card-info { flex: 1; }
.heartbeat-card .card-name { font-size: 14px; font-weight: 600; }
.heartbeat-card .card-bpm { font-size: 12px; color: var(--text2); }
.heartbeat-card .card-bar {
  height: 6px; background: var(--bg); border-radius: 3px; margin-top: 4px;
}
.heartbeat-card .card-bar-fill { height: 100%; border-radius: 3px; background: var(--accent2); }

.result-summary-box {
  background: var(--bg-card); border-radius: 10px;
  padding: 16px; margin: 16px 0; white-space: pre-wrap;
  font-size: 13px; line-height: 1.8;
}

.disclaimer { font-size: 11px; color: var(--text2); margin-top: 16px; text-align: center; }

.result-actions { display: flex; gap: 8px; margin-top: 16px; }
.result-actions .btn { flex: 1; }

/* ============================================================
   悬浮预览窗口（右下角）
   ============================================================ */
.camera-preview-float {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 9999;
  border: 2px solid var(--accent);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 255, 100, 0.3);
  background: var(--bg-card);
}
#preview-canvas { display: block; }

/* ============================================================
   调试面板
   ============================================================ */
.debug-panel {
  margin-top: 20px; font-size: 12px; color: var(--text2);
  background: var(--bg-card); border-radius: 8px; padding: 8px;
}
.debug-panel summary { cursor: pointer; color: var(--text2); }
.debug-panel div { margin: 2px 0; }

/* ============================================================
   进度条
   ============================================================ */
progress {
  -webkit-appearance: none; appearance: none;
  height: 6px; border-radius: 3px;
  background: var(--bg-card); border: none;
}
progress::-webkit-progress-bar { background: var(--bg-card); border-radius: 3px; }
progress::-webkit-progress-value { background: var(--accent); border-radius: 3px; }
progress::-moz-progress-bar { background: var(--accent); border-radius: 3px; }