/* 基础样式设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 700;
}

header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

/* 卡片样式 */
.calculator-card, .results-card, .saved-records {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 25px;
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.calculator-card:hover, .results-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
}

input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.3s;
}

input[type="number"]:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* 单选按钮样式 */
.radio-container {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.activity-levels {
    gap: 10px;
}

.radio-label {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    padding: 8px 16px;
    background-color: #f1f5f9;
    border-radius: 6px;
    transition: all 0.2s;
}

.radio-label:hover {
    background-color: #e2e8f0;
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-label input[type="radio"]:checked + span {
    color: #3498db;
    font-weight: 500;
}

.radio-label span {
    margin-left: 5px;
}

/* 按钮样式 */
.calculate-btn, .save-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 10px;
}

.calculate-btn:hover, .save-btn:hover {
    background-color: #2980b9;
}

.save-btn {
    background-color: #2ecc71;
    margin-top: 20px;
}

.save-btn:hover {
    background-color: #27ae60;
}

/* 结果样式 */
.hidden {
    display: none;
}

.results-card h2, .saved-records h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

.bmi-section {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.bmi-value {
    margin-bottom: 10px;
}

#bmi-number {
    font-size: 3rem;
    font-weight: 700;
    color: #3498db;
}

.label {
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-left: 10px;
}

.bmi-category {
    margin-bottom: 10px;
}

#body-type {
    font-size: 1.5rem;
    font-weight: 500;
    color: #2c3e50;
}

.goal {
    color: #7f8c8d;
}

#goal {
    font-weight: 500;
    color: #e74c3c;
}

/* 营养部分样式 */
.nutrition-section {
    text-align: center;
}

.nutrition-section h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.metabolism, .calorie-recommendation {
    margin-bottom: 20px;
}

.metabolism p, .calorie-recommendation p {
    margin-bottom: 5px;
    color: #7f8c8d;
}

.metabolism span, .calorie-recommendation span {
    font-weight: 500;
    color: #2c3e50;
}

.nutrients {
    display: flex;
    justify-content: space-around;
    margin-top: 25px;
}

.nutrient-item {
    text-align: center;
}

.circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
}

.inner-circle {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: #7f8c8d;
}

.protein {
    background-color: rgba(46, 204, 113, 0.2);
}

.fat {
    background-color: rgba(231, 76, 60, 0.2);
}

.carb {
    background-color: rgba(52, 152, 219, 0.2);
}

.nutrient-item p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.nutrient-item span {
    font-weight: 700;
    color: #2c3e50;
}

/* 保存消息 */
.save-message {
    text-align: center;
    margin-top: 15px;
    color: #2ecc71;
    font-weight: 500;
}

/* 历史记录 */
.saved-records {
    margin-top: 30px;
}

.no-records-message {
    text-align: center;
    color: #7f8c8d;
    padding: 20px;
}

.record-item {
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 6px;
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
}

.record-item .record-date {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 5px;
}

.record-item .record-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.record-value {
    font-weight: 500;
}

/* 页脚样式 */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nutrients {
        flex-direction: column;
        gap: 20px;
    }
    
    .circle {
        width: 70px;
        height: 70px;
    }
    
    .inner-circle {
        width: 55px;
        height: 55px;
    }
    
    .radio-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .radio-label {
        width: 100%;
    }
}