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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  min-height: 100vh;
  color: #e8edf2;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

header {
  text-align: center;
  margin-bottom: 24px;
}

header h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(90deg, #ffd700, #ffaa00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.room-info {
  margin-top: 8px;
  font-size: 14px;
  color: #9fb3c8;
}

.card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.label {
  font-size: 14px;
  color: #9fb3c8;
  font-weight: 500;
}

.status-badge {
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.ok {
  background: rgba(46, 204, 113, 0.2);
  color: #2ecc71;
}

.status-badge.err {
  background: rgba(231, 76, 60, 0.2);
  color: #e74c3c;
}

.status-badge.loading {
  background: rgba(241, 196, 15, 0.2);
  color: #f1c40f;
}

.surplus-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  padding: 16px 0 8px;
}

.surplus-value {
  font-size: 64px;
  font-weight: 800;
  background: linear-gradient(90deg, #4fc3f7, #00e5ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.surplus-unit {
  font-size: 20px;
  color: #9fb3c8;
  margin-left: 8px;
}

.sub-info {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 13px;
  color: #9fb3c8;
  margin-bottom: 16px;
}

.refresh-btn {
  display: block;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, #00b4d8, #0096c7);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
}

.refresh-btn:hover {
  transform: translateY(-1px);
  opacity: 0.9;
}

.refresh-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chart-wrap {
  position: relative;
}

.chart-empty {
  display: none;
  text-align: center;
  padding: 40px 0;
  color: #9fb3c8;
  font-size: 14px;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.history-table th,
.history-table td {
  padding: 10px 8px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.history-table th {
  color: #9fb3c8;
  font-weight: 500;
  font-size: 12px;
}

.history-table td:first-child {
  text-align: left;
}

.empty-td {
  color: #9fb3c8;
  text-align: center !important;
  padding: 24px 0 !important;
}

.tag {
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
}

.tag.auto {
  background: rgba(0, 180, 216, 0.2);
  color: #4fc3f7;
}

.tag.manual {
  background: rgba(241, 196, 15, 0.2);
  color: #f1c40f;
}

.tag.cache {
  background: rgba(46, 204, 113, 0.2);
  color: #2ecc71;
}

/* 月份选择器 */
.month-selector {
  display: flex;
  align-items: center;
  gap: 6px;
}

.month-selector input[type="month"] {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e8edf2;
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 13px;
  color-scheme: dark;
}

.month-selector input[type="month"]::-webkit-calendar-picker-indicator {
  filter: invert(0.8);
}

.mini-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e8edf2;
  border-radius: 8px;
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s;
}

.mini-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 月度汇总 */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

@media (max-width: 480px) {
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.summary-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 10px 8px;
  text-align: center;
}

.summary-value {
  font-size: 20px;
  font-weight: 700;
  color: #ffd700;
}

.summary-label {
  font-size: 11px;
  color: #9fb3c8;
  margin-top: 2px;
}