body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.card {
    border-radius: 1rem;
    overflow: hidden;
    border: none;
}
.card-header {
    background: linear-gradient(45deg, #0d6efd, #0b5ed7);
}
.btn-primary {
    background: linear-gradient(45deg, #0d6efd, #0b5ed7);
    border: none;
    transition: transform 0.2s;
}
.btn-primary:hover {
    transform: translateY(-2px);
}
video {
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}