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

/* 卡片样式 */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    transition: transform 0.3s;
}

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

.card-header {
    border-radius: 10px 10px 0 0 !important;
    font-weight: 500;
}

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

/* 按钮样式 */
.btn {
    border-radius: 5px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #4e73df;
    border-color: #4e73df;
}

.btn-primary:hover {
    background-color: #2e59d9;
    border-color: #2653d4;
}

.btn-success {
    background-color: #1cc88a;
    border-color: #1cc88a;
}

.btn-success:hover {
    background-color: #17a673;
    border-color: #169b6b;
}

.btn-warning {
    background-color: #f6c23e;
    border-color: #f6c23e;
}

.btn-warning:hover {
    background-color: #f4b619;
    border-color: #f4b30d;
}

.btn-danger {
    background-color: #e74a3b;
    border-color: #e74a3b;
}

.btn-danger:hover {
    background-color: #e02d1b;
    border-color: #d52a1a;
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

/* 表单样式 */
.form-control {
    border-radius: 5px;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d3e2;
}

.form-control:focus {
    border-color: #bac8f3;
    box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
}

/* 表格样式 */
.table {
    border-radius: 5px;
    overflow: hidden;
}

.table thead th {
    background-color: #f8f9fc;
    border-bottom: 2px solid #e3e6f0;
    font-weight: 700;
}

/* 徽章样式 */
.badge {
    font-weight: 600;
    padding: 0.35em 0.65em;
    border-radius: 0.25rem;
}

/* 页脚样式 */
.footer {
    padding: 2rem 0;
    margin-top: 3rem;
    background-color: #fff;
    border-top: 1px solid #e3e6f0;
}

/* 登录和注册页面样式 */
.login-container, .register-container {
    max-width: 500px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* 主页样式 */
.main-container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.btn-custom {
    margin: 10px;
    padding: 15px 30px;
    font-size: 18px;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .card {
        margin-bottom: 20px;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
}