/* 配色变量 */
:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --secondary-color: #3f37c9;
    --accent-color: #f72585;
    --success-color: #4cc9f0;
    --warning-color: #f8961e;
    --danger-color: #f94144;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --text-color: #495057;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 全局样式 */
body {
    background-color: var(--light-bg);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: var(--transition);
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,.1);
    background: linear-gradient(to right, var(--primary-color), var(--primary-light)) !important;
    padding: 0.8rem 1rem;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
    margin: 0 0.2rem;
    transition: var(--transition);
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 卡片样式 */
.card {
    box-shadow: var(--box-shadow);
    border: none;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid rgba(0,0,0,.05);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: #fff;
    border-top: 1px solid rgba(0,0,0,.05);
    padding: 1.25rem 1.5rem;
}

/* 表格样式 */
.table {
    margin-bottom: 0;
}

.table th {
    border-top: none;
    background-color: rgba(0,0,0,.02);
    font-weight: 600;
    color: var(--primary-color);
}

.table td {
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 0.6rem 1.5rem;
    transition: var(--transition);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 表单样式 */
.form-control {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    border: 1px solid rgba(0,0,0,.1);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
}

.form-select {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    height: auto;
    border: 1px solid rgba(0,0,0,.1);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.form-text {
    color: #6c757d;
    font-size: 0.875rem;
}

/* 提示框样式 */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 图表容器样式 */
#scoreChart {
    min-height: 300px;
    padding: 1rem;
    animation: fadeIn 0.5s ease;
}

/* 头像和用户信息 */
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.5rem;
}

/* 页面标题 */
h2 {
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 0.5rem;
}

h2:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

/* 空状态样式 */
.empty-state {
    padding: 3rem;
    text-align: center;
    color: #adb5bd;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        margin-bottom: 1rem;
        border-radius: 0.375rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
    
    .table-responsive {
        margin: 0 -1.5rem;
        width: calc(100% + 3rem);
    }
    
    .nav-link {
        padding: 0.4rem 0.8rem !important;
    }
}