body {
    background-color: #121212;
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
    background-size: cover;
}

.card {
    border: 1px solid #333;
}

.form-control {
    background-color: #222;
    border: 1px solid #444;
    color: #fff;
}

.form-control:focus {
    background-color: #222;
    border-color: #007bff;
    color: #fff;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #fff;
    border-radius: 50%;
    animation: twinkle 5s infinite;
}

@keyframes twinkle {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}