/* 校园二手交易平台样式表 */

/* 全局样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
}

.navbar-brand i {
    margin-right: 0.5rem;
}

/* 卡片样式 */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: 600;
}

/* 商品卡片特殊样式 */
.product-card {
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.product-card:hover {
    border-color: #007bff;
    transform: translateY(-5px);
}

.product-image {
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image {
    transform: scale(1.05);
}

/* 价格样式 */
.price {
    font-size: 1.25rem;
    color: #dc3545;
}

/* 按钮样式 */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(45deg, #007bff, #0056b3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0056b3, #004085);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(45deg, #28a745, #1e7e34);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(45deg, #1e7e34, #155724);
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(45deg, #ffc107, #e0a800);
    border: none;
    color: #212529;
}

.btn-warning:hover {
    background: linear-gradient(45deg, #e0a800, #b38f00);
    transform: translateY(-1px);
    color: #212529;
}

/* 表单样式 */
.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 英雄区域样式 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-section h1 {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-section .btn {
    border-radius: 50px;
    padding: 0.75rem 2rem;
}

/* 特色图标样式 */
.feature-icon {
    background: linear-gradient(45deg, #007bff, #0056b3);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

/* 面包屑导航 */
.breadcrumb {
    background-color: transparent;
    padding: 0.75rem 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: #6c757d;
}

/* 模态框样式 */
.modal-content {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
}

/* 分页样式 */
.pagination .page-link {
    color: #007bff;
    border: 1px solid #dee2e6;
}

.pagination .page-item.active .page-link {
    background-color: #007bff;
    border-color: #007bff;
}

.pagination .page-link:hover {
    color: #0056b3;
    background-color: #e9ecef;
    border-color: #dee2e6;
}

/* 徽章样式 */
.badge {
    font-size: 0.75em;
    font-weight: 500;
}

/* 卖家信息样式 */
.seller-info {
    background-color: #f8f9fa;
    border-radius: 0.375rem;
    padding: 1rem;
    border-left: 4px solid #007bff;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
        padding: 2rem 1rem;
    }
    
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .product-card {
        margin-bottom: 1rem;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 工具提示样式 */
.tooltip {
    font-size: 0.875rem;
}

/* 表单验证样式 */
.is-invalid {
    border-color: #dc3545;
}

.is-valid {
    border-color: #28a745;
}

.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #dc3545;
}

/* 图片预览样式 */
#imagePreview {
    border: 2px dashed #dee2e6;
}

#imagePreview img {
    max-width: 100%;
    border-radius: 0.375rem;
}

/* 页脚样式 */
footer {
    margin-top: auto;
}

/* 确保内容区域有足够的内边距 */
.container {
    padding-bottom: 2rem;
}

/* 打印样式 */
@media print {
    .navbar, .footer, .btn {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #000 !important;
    }
}