/**
 * 组件样式文件
 * 包含按钮、卡片、表单等通用组件
 */

/* ========== 按钮组件 ========== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    line-height: 1.5;
}

.btn-primary {
    background: #3498db;
    color: #fff;
}

.btn-primary:hover {
    background: #2980b9;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background: #95a5a6;
    color: #fff;
}

.btn-secondary:hover {
    background: #7f8c8d;
    color: #fff;
}

.btn-success {
    background: #27ae60;
    color: #fff;
}

.btn-success:hover {
    background: #229954;
    color: #fff;
}

.btn-danger {
    background: #e74c3c;
    color: #fff;
}

.btn-danger:hover {
    background: #c0392b;
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 2px solid #3498db;
    color: #3498db;
}

.btn-outline:hover {
    background: #3498db;
    color: #fff;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* ========== 卡片组件 ========== */
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.card-header {
    padding: 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.card-title {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
}

/* ========== 产品卡片 ========== */
.product-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.product-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #f8f9fa;
}

.product-card-body {
    padding: 15px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2c3e50;
    line-height: 1.4;
}

.product-card-title a {
    color: #2c3e50;
}

.product-card-title a:hover {
    color: #3498db;
}

.product-card-meta {
    font-size: 14px;
    color: #7f8c8d;
    margin-bottom: 10px;
}

.product-card-footer {
    margin-top: auto;
    padding-top: 10px;
}

/* ========== 网格布局 ========== */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

/* ========== 表单组件 ========== */
.form-group {
    margin-bottom: 20px;
}

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

.form-control {
    width: 100%;
    padding: 10px 15px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ========== 分页组件 ========== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background: #3498db;
    color: #fff;
    border-color: #3498db;
}

.pagination .active {
    background: #3498db;
    color: #fff;
    border-color: #3498db;
}

/* ========== 警告框 ========== */
.alert {
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    border-color: #27ae60;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    border-color: #e74c3c;
    color: #721c24;
}

.alert-info {
    background: #d1ecf1;
    border-color: #3498db;
    color: #0c5460;
}

.alert-warning {
    background: #fff3cd;
    border-color: #f39c12;
    color: #856404;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .grid-auto {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .card-body,
    .card-header {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .grid-auto {
        grid-template-columns: 1fr;
    }
}