body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}
.auth-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    padding: 40px;
    margin: auto;
}
.auth-header {
    text-align: center;
    margin-bottom: 30px;
}
.btn-auth {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
    width: 100%;
    padding: 12px;
    border-radius: 25px;
    font-weight: 600;
}
.btn-auth:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
    color: white;
}
.form-control {
    border-radius: 10px;
    padding: 12px;
}