:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --bg-3: #334155;
  --border: #475569;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

#app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* ---------- 登录页 ---------- */
.login-container {
  max-width: 420px;
  margin: 100px auto;
  background: var(--bg-2);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.login-container h1 {
  text-align: center;
  margin-bottom: 32px;
  font-size: 24px;
}
.login-container .sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 13px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 14px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-secondary {
  background: var(--bg-3);
}
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #16a34a; }
.btn-block { width: 100%; padding: 12px; font-size: 15px; }
.error-text {
  color: var(--danger);
  font-size: 13px;
  margin-top: 8px;
  min-height: 18px;
}

/* ---------- 导航 ---------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-2);
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 24px;
}
.navbar-brand {
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.heart-icon { color: #ef4444; font-size: 20px; }
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  padding: 8px 14px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
}
.nav-links a:hover { background: var(--bg-3); color: var(--text); }
.nav-links a.active { background: var(--accent); color: #fff; }
.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}
.user-badge {
  display: inline-block;
  padding: 2px 8px;
  background: var(--warning);
  color: #000;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 18px; }
.card-header h3 { font-size: 16px; }

/* ---------- 心率概览卡片 ---------- */
.hr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}
.hr-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.hr-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--hr-color, #475569);
}
.hr-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}
.hr-username { font-size: 16px; font-weight: 600; }
.hr-zone-badge {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}
.hr-value {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  margin: 12px 0 4px;
}
.hr-unit { font-size: 18px; color: var(--text-muted); font-weight: 400; }
.hr-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}
.hr-stats > * { flex: 1; min-width: 0; }
.hr-stat-label { font-size: 11px; text-transform: uppercase; }
.hr-stat-value { color: var(--text); font-size: 16px; font-weight: 600; }
.hr-update-time {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-muted);
}
.no-widget { opacity: 0.5; }

/* ---------- 图表区域 ---------- */
.chart-container {
  position: relative;
  height: 400px;
}
.chart-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.chart-controls label {
  font-size: 13px;
  color: var(--text-muted);
}
.chart-controls select,
.chart-controls input {
  padding: 6px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
}
.user-select-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.chip {
  padding: 4px 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 16px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- 用户管理表格 ---------- */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th, .table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.table tr:hover { background: var(--bg-3); }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.badge-admin { background: var(--warning); color: #000; }
.badge-user { background: var(--bg-3); color: var(--text-muted); }
.badge-has-widget { background: var(--success); color: #000; }
.badge-no-widget { background: var(--bg-3); color: var(--text-muted); }
.action-btns { display: flex; gap: 6px; }
.action-btns .btn { padding: 6px 10px; font-size: 12px; }

/* ---------- 弹窗 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.modal-header h3 { font-size: 18px; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }
.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ---------- 心率区间图例 ---------- */
.zone-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.zone-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--bg-3);
  border-radius: 12px;
  font-size: 12px;
}
.zone-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* ---------- 设置区 ---------- */
.settings-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.settings-row:last-child { border-bottom: none; }
.settings-label { color: var(--text-muted); font-size: 14px; }

/* ---------- Toast ---------- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.25s ease-out;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--accent); }
@keyframes slideIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ---------- 通用 ---------- */
.flex { display: flex; gap: 8px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-12 { gap: 12px; }
.mt-16 { margin-top: 16px; }
.mb-12 { margin-bottom: 12px; }
.muted { color: var(--text-muted); font-size: 13px; }
.text-right { text-align: right; }
.truncate {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
}
.empty-state {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}
.loading {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 实时指示器 ---------- */
.live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  margin-right: 4px;
  vertical-align: middle;
}
.live-dot.pulsing {
  animation: pulse-dot 1.2s ease-in-out infinite;
  box-shadow: 0 0 8px var(--success);
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ---------- 后台采集状态栏 ---------- */
.cron-status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--text-muted);
}
.cron-status-bar.active {
  border-color: var(--success);
  background: rgba(34, 197, 94, 0.08);
}
.cron-status-icon {
  font-size: 16px;
  animation: spin 3s linear infinite;
}

/* ---------- 心率数值跳动动画 ---------- */
.hr-beat {
  animation: hr-beat-anim 0.6s ease-out;
}
@keyframes hr-beat-anim {
  0% { transform: scale(1); }
  15% { transform: scale(1.12); text-shadow: 0 0 20px currentColor; }
  30% { transform: scale(0.98); }
  45% { transform: scale(1.06); }
  100% { transform: scale(1); text-shadow: none; }
}

@media (max-width: 640px) {
  .navbar { flex-direction: column; gap: 12px; }
  .hr-grid { grid-template-columns: 1fr; }
  .settings-row { grid-template-columns: 1fr; }
  .chart-container { height: 280px; }
}