* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #f5f7fa;
  padding: 15px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* 卡片 */
.card {
  background: white;
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.summary-card { background: #e3f2fd; }
.form-card { background: #fff8e1; }
.export-card { background: #e8f5e9; text-align: center; }
.chart-card { background: #fce4ec; }

/* 标题图标 */
.title-icon {
  width: 24px;
  height: 24px;
  vertical-align: middle;
  margin-right: 8px;
  border-radius: 4px;
}

h2 {
  font-size: 18px;
  margin-bottom: 12px;
  color: #333;
  display: flex;
  align-items: center;
}

p {
  margin: 8px 0;
  font-size: 16px;
}

span {
  font-weight: bold;
  color: #d32f2f;
}

/* 输入行 */
.input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0;
}

#dailyLimit {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
}

.mini-btn {
  padding: 6px 10px;
  background: #673ab7;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

/* 表单 */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 15px;
}

input, select {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 15px;
}

/* 按钮 */
.btn {
  padding: 10px 15px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
}

.add-btn { background: #4caf50; color: white; width: 100%; }
.export-btn { background: #2196f3; color: white; width: 100%; font-size: 16px; }
.del-btn { background: #ff5252; color: white; padding: 6px 10px; font-size: 13px; }

/* 餐段样式 */
.meal-group { margin-top: 5px; }
.meal-title {
  font-size: 17px;
  font-weight: bold;
  color: #1976d2;
  margin: 10px 0;
  padding-bottom: 5px;
  border-bottom: 1px solid #eee;
  display: flex;
  justify-content: space-between;
}
.meal-total { color: #d32f2f; font-size: 16px; }

.record-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  background: #fafafa;
  border-radius: 6px;
  margin-bottom: 8px;
}

.empty-tip { color: #999; text-align: center; padding: 10px; }

/* 图表 */
#weekChart { max-height: 250px; }