body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
}
.login-header {
    background: #3498db;
    color: white;
    text-align: center;
    padding: 25px;
}
.login-header i {
    font-size: 3rem;
    margin-bottom: 15px;
}
.login-body {
    padding: 25px;
}
.form-control:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
}
.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}
.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}