/* Login & Game Over Overlays */

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

input {
    background: #111;
    border: 1px solid var(--neon-blue);
    color: white;
    padding: 15px;
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
    width: 300px;
    outline: none;
}

/* Primary Button */
.big-btn {
    background: var(--neon-magenta);
    color: white;
    padding: 15px 40px;
    border: 2px solid var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    cursor: pointer;
    font-size: 18px;
    box-shadow:
        0 0 20px var(--neon-magenta),
        0 0 40px var(--neon-purple),
        inset 0 0 20px rgba(255, 0, 255, 0.3);
    text-transform: uppercase;
    transition: 0.3s;
    letter-spacing: 2px;
}

.big-btn:hover {
    transform: scale(1.08);
    box-shadow:
        0 0 30px var(--neon-magenta),
        0 0 60px var(--neon-purple),
        inset 0 0 30px rgba(255, 0, 255, 0.5);
}