/* 通用组件：卡片、按钮、徽标、指标卡、空状态、骨架屏 */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.card-head { display: flex; align-items: center; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.card-head h3 { flex: 1; }
.card-head .hint { font-size: 12px; color: var(--text-3); }
.card-body { padding: 18px; }
.card-body.flush { padding: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 34px; padding: 0 14px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: background .15s, border-color .15s, box-shadow .15s, transform .05s;
  box-shadow: var(--shadow-sm);
}
.btn:hover { background: var(--surface-3); text-decoration: none; color: var(--text); }
.btn:active { transform: translateY(1px); }
.btn svg { width: 16px; height: 16px; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn.danger { color: var(--danger); }
.btn.danger.solid { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { border-color: transparent; box-shadow: none; background: transparent; }
.btn.ghost:hover { background: var(--surface-3); }
.btn.sm { height: 28px; padding: 0 10px; font-size: 13px; }
.btn.icon { width: 34px; padding: 0; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn.loading { pointer-events: none; opacity: .75; }
.btn.loading::before {
  content: ""; width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent; animation: spin .7s linear infinite;
}

.badge {
  display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 8px; border-radius: 11px;
  font-size: 12px; font-weight: 500; background: var(--surface-3); color: var(--text-2); white-space: nowrap;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .8; }
.badge.plain::before { display: none; }
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warning { background: var(--warning-soft); color: var(--warning); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.info { background: var(--info-soft); color: var(--info); }
.badge.primary { background: var(--primary-soft); color: var(--primary-text); }

kbd {
  font-family: var(--font); font-size: 11px; padding: 1px 6px; border-radius: 4px;
  border: 1px solid var(--border-strong); border-bottom-width: 2px; color: var(--text-2); background: var(--surface-2);
}

.kpi { padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; position: relative; overflow: hidden; }
.kpi .label { font-size: 13px; color: var(--text-2); display: flex; align-items: center; gap: 6px; }
.kpi .value { font-size: 26px; font-weight: 650; letter-spacing: -.02em; }
.kpi .value small { font-size: 14px; font-weight: 500; color: var(--text-3); margin-left: 2px; }
.kpi .delta { font-size: 12px; }
.kpi .spark { position: absolute; right: 12px; bottom: 12px; opacity: .9; }
a.kpi:hover { text-decoration: none; border-color: var(--border-strong); }

.empty { padding: 48px 16px; text-align: center; color: var(--text-3); }
.empty svg { width: 40px; height: 40px; opacity: .5; margin-bottom: 8px; }

.skeleton {
  border-radius: 6px; min-height: 14px;
  background: linear-gradient(90deg, var(--surface-3) 0, var(--surface-2) 50%, var(--surface-3) 100%);
  background-size: 800px 100%; animation: shimmer 1.2s infinite linear;
}

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs a {
  padding: 8px 14px; color: var(--text-2); font-weight: 500; border-bottom: 2px solid transparent; margin-bottom: -1px;
  white-space: nowrap;
}
.tabs a:hover { color: var(--text); text-decoration: none; }
.tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }

.alert { display: flex; gap: 12px; padding: 12px 14px; border-radius: var(--radius); border: 1px solid; }
.alert.danger { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 25%, transparent); }
.alert.warning { background: var(--warning-soft); border-color: color-mix(in srgb, var(--warning) 25%, transparent); }
.alert.info { background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 25%, transparent); }
.alert .dot { width: 8px; height: 8px; border-radius: 50%; margin-top: 7px; flex: none; }
.alert.danger .dot { background: var(--danger); }
.alert.warning .dot { background: var(--warning); }
.alert.info .dot { background: var(--info); }

.dl { display: grid; grid-template-columns: max-content 1fr; gap: 8px 20px; }
.dl dt { color: var(--text-3); }
.dl dd { margin: 0; }