body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    text-align: center;
}
.container {
    max-width: 500px;
    padding: 2rem;
    background-color: rgba(26, 32, 44, 0.8);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.logo {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #805ad5;
}
.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 4px solid #805ad5;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.error {
    color: #fc8181;
    background-color: rgba(252, 129, 129, 0.1);
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
}
.btn {
    background-color: #805ad5;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 1rem;
    text-decoration: none;
    display: inline-block;
}
.btn:hover {
    background-color: #6b46c1;
}