body {
    background: url('../images/hacker-bg.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
    font-family: 'Arial', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: rgba(0, 0, 0, 0.8);
    border-bottom: 2px solid #00ff00;
}

.navbar-brand, .nav-link {
    color: #00ff00 !important;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #ff00ff !important;
}

.container {
    flex: 1;
    padding-top: 30px;
}

.card {
    background: rgba(0, 0, 0, 0.6) !important;
    border: 1px solid #00ff00;
}

.text-primary { color: #00ff00 !important; }
.text-danger { color: #ff0000 !important; }
.text-success { color: #00ff00 !important; }
.text-warning { color: #ffcc00 !important; }
.text-light { color: #ccc !important; }

.btn-primary {
    background-color: #00ff00;
    border-color: #00ff00;
    color: #000;
}

.btn-primary:hover {
    background-color: #ff00ff;
    border-color: #ff00ff;
}

.btn-danger {
    background-color: #ff0000;
    border-color: #ff0000;
}

.btn-danger:hover {
    background-color: #cc0000;
    border-color: #cc0000;
}

.form-control {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid #00ff00;
    color: #fff;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: #ff00ff;
    color: #fff;
    box-shadow: none;
}

.table-dark {
    background: rgba(0, 0, 0, 0.8);
}

.table-dark th, .table-dark td {
    border-color: #00ff00;
}

.pagination .page-link {
    background: rgba(0, 0, 0, 0.8);
    border-color: #00ff00;
    color: #00ff00;
}

.pagination .page-item.active .page-link {
    background-color: #00ff00;
    border-color: #00ff00;
    color: #000;
}

video {
    max-width: 100%;
    height: auto;
}

.question-block {
    border: 1px solid #00ff00;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
}