body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
    color: #333;
    margin: 0;
    padding: 0;
}
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.header h1 {
    margin: 0;
    font-size: 2.5em;
    font-weight: 300;
}
.login-status {
    margin-top: 10px;
    font-size: 1em;
    color: #fff;
}
.tab-bar {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    padding: 0 10px;
    overflow-x: auto;
}
.tab {
    padding: 15px 25px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: #666;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    outline: none;
}
.tab:hover {
    background: #e9ecef;
    color: #333;
}
.tab.active {
    background: white;
    color: #007bff;
    border-bottom-color: #007bff;
}
.service-container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 30px;
    min-height: 400px;
    margin-top: 30px;
}
@media (max-width: 768px) {
    .service-container {
        padding: 10px;
    }
    .tab {
        padding: 10px 10px;
        font-size: 12px;
    }
}