body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: black;
    color: #15fe00;
    font-family: 'Courier New', monospace; /* Hacker font */
    perspective: 1000px; /* For 3D effects */
    margin: 0;
    padding: 0;
}

.container {
    flex: 1;
    border: 5px solid #15fe00;
    margin: 20px;
    padding: 20px;
    box-shadow: 0 0 20px #15fe00; /* Glow effect */
    transform-style: preserve-3d;
}

footer {
    text-align: center;
    background-color: black;
    color: #15fe00;
    padding: 10px;
    border-top: 2px solid #15fe00;
}

button {
    padding: 8px 16px;
    font-size: 16px;
    background-color: #15fe00;
    color: black;
    border: 2px solid #15fe00;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 10px #15fe00;
    margin-bottom: 10px;
}

button:hover {
    background-color: black;
    color: #15fe00;
    transform: scale(1.1);
    box-shadow: 0 0 20px #15fe00;
}

hr {
    border: 1px solid #15fe00;
    margin: 20px 0;
    box-shadow: 0 0 5px #15fe00;
}

h1 {
    text-align: center;
    border: 5px solid #15fe00;
    border-radius: 10px;
    padding: 10px;
    background-color: rgba(21, 254, 0, 0.1);
    box-shadow: 0 0 15px #15fe00;
    transform: translateZ(20px); /* 3D pop out */
    text-shadow: 0 0 10px #15fe00;
}

h3 {
    text-shadow: 0 0 5px #15fe00;
}

/* Menu styles */
.menu-button {
    position: fixed;
    top: 10px;
    right: 10px;
    background-color: #15fe00;
    color: black;
    border: 2px solid #15fe00;
    padding: 10px;
    cursor: pointer;
    font-size: 18px;
    z-index: 1000;
    transition: all 0.3s;
    box-shadow: 0 0 10px #15fe00;
}

.menu-button:hover {
    background-color: black;
    color: #15fe00;
    transform: scale(1.1);
    box-shadow: 0 0 20px #15fe00;
}

.menu {
    display: none;
    position: fixed;
    top: 70px;
    right: 10px;
    background-color: black;
    border: 2px solid #15fe00;
    padding: 10px;
    z-index: 999;
    box-shadow: 0 0 15px #15fe00;
    transform: translateZ(10px);
}

.menu-button:hover + .menu,
.menu:hover {
    display: block;
}

.menu a {
    display: block;
    color: #15fe00;
    text-decoration: none;
    padding: 5px 0;
    transition: all 0.3s;
    text-shadow: 0 0 5px #15fe00;
}

.menu a:hover {
    background-color: #15fe00;
    color: black;
    transform: translateX(-5px);
}

/* Animation for hacker feel */
@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

h1 {
    animation: flicker 2s infinite;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .container {
        margin: 10px;
        padding: 15px;
    }

    button {
        font-size: 14px;
        padding: 6px 12px;
        margin-bottom: 8px;
    }

    h1 {
        font-size: 28px;
        padding: 8px;
    }

    h3 {
        font-size: 18px;
    }

    .menu-button {
        top: 5px;
        right: 5px;
        padding: 8px;
        font-size: 14px;
    }

    .menu {
        top: 45px;
        right: 5px;
        padding: 8px;
    }

    .menu a {
        padding: 4px 0;
        font-size: 14px;
    }
}