body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #e2e8f0;
    color: #334155;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    background-color: #fff;
    padding: 1rem;
}

.btn {
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    gap: 0.5rem;
    text-decoration: none;
    margin: 0px;
}

.btn-container {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
    }

.alert-danger {
    padding: 12px 16px;
    border-radius: 10px;
    background: #fee2e2;
    color: #b91c1c;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    border: 1px solid #fecaca;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    margin: 1rem auto;
    max-width: 300px; 
}