/* style.css - 统一风格样式表 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px 0;
    margin-bottom: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.header h1 {
    font-size: 2.5em;
    font-weight: 300;
}

.nav-links {
    display: flex;
    gap: 15px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
    font-weight: 500;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background: #28a745;
    color: white;
}

.btn-primary:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-info {
    background: #17a2b8;
    color: white;
    padding: 6px 12px;
    font-size: 0.9em;
}

.btn-info:hover {
    background: #138496;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

/* 表单样式 */
.form-container {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #495057;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* 消息提示样式 */
.message {
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    border: 1px solid transparent;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.message.warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffeaa7;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 10px;
}

.stat-label {
    color: #6c757d;
    font-size: 0.9em;
}

/* 表格样式 */
.data-table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 25px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

th {
    font-weight: 500;
}

tbody tr:hover {
    background-color: #f8f9fa;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 10px;
}

.pagination a, .pagination span {
    padding: 8px 16px;
    border: 1px solid #dee2e6;
    text-decoration: none;
    color: #667eea;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background: #667eea;
    color: white;
}

.pagination .current {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* 空状态样式 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state i {
    font-size: 3em;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* 搜索框样式 */
.search-box {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 25px;
}

.search-form {
    display: flex;
    gap: 10px;
}

.search-form input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.search-form input:focus {
    outline: none;
    border-color: #667eea;
}

/* 调试信息样式 */
.debug-info {
    background: #e2e3e5;
    color: #383d41;
    border: 1px solid #d6d8db;
    
    margin: 15px 0;
    border-radius: 5px;
    font-family: monospace;
    font-size: 0.9em;
    white-space: pre-wrap;
}

/* 登录表单样式 */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    color: #495057;
    margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .search-form {
        flex-direction: column;
    }
    
    table {
        font-size: 0.9em;
    }
    
    th, td {
        padding: 10px 8px;
    }
    
    .nav-links {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-links .btn {
        width: 100%;
        text-align: center;
    }
}

/* 特殊行样式 */
.rank-1 { background-color: #fff3cd !important; }
.rank-2 { background-color: #f8f9fa !important; }
.rank-3 { background-color: #e2e3e5 !important; }

.subject-score {
    text-align: center;
    font-weight: bold;
}

.total-score {
    text-align: center;
    font-weight: bold;
    color: #dc3545;
}

.avg-score {
    color: #28a745;
    font-weight: bold;
}

.max-score {
    color: #dc3545;
}

.min-score {
    color: #6c757d;
}
.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background: #e0a800;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}