body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.min-vh-100 {
    min-height: 100vh;
}

.card {
    border: none;
    border-radius: 15px;
    overflow: hidden;
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    padding: 1.5rem;
}

.card-body {
    background: #fff;
}

#uuidDisplay {
    font-family: 'Courier New', monospace;
    letter-spacing: 1px;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
}

#uuidDisplay:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(45deg, #0d6efd, #0dcaf0);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.4);
}

.btn-outline-secondary {
    border-color: #6c757d;
}

.btn-outline-secondary:hover {
    background-color: #6c757d;
    border-color: #6c757d;
    transform: translateY(-1px);
}

.input-group {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

.form-control {
    border: none;
}

.form-control:focus {
    box-shadow: none;
}

/* Loading animation */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* SweetAlert customizations */
.swal2-popup {
    border-radius: 15px;
}