body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

/* Fondo con imagen */
.main-container {
    width: 100vw;
    height: 100vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.btn-comenzar {
    background-color: rgba(255, 255, 255, 0.95);
    color: #333;
    border: 4px solid #333;
    padding: 20px 50px;
    font-size: 16px;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 0;
    box-shadow: 6px 6px 0px #333;
    transition: all 0.2s ease;
    font-family: 'Press Start 2P', monospace;
    image-rendering: pixelated;
}

.btn-comenzar:hover {
    background-color: #333;
    color: white;
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0px #666;
}

.btn-comenzar:active {
    transform: translate(6px, 6px);
    box-shadow: 0px 0px 0px #333;
}

.title {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 32px;
    font-weight: normal;
    text-shadow: 4px 4px 0px #333, 8px 8px 0px rgba(0,0,0,0.3);
    font-family: 'Press Start 2P', monospace;
    text-transform: uppercase;
    letter-spacing: 2px;
    image-rendering: pixelated;
}

@media (max-width: 768px) {
    .title {
        font-size: 20px;
        letter-spacing: 1px;
        text-shadow: 3px 3px 0px #333, 6px 6px 0px rgba(0,0,0,0.3);
    }
    
    .btn-comenzar {
        font-size: 12px;
        padding: 15px 35px;
        letter-spacing: 1px;
        box-shadow: 4px 4px 0px #333;
    }
    
    .btn-comenzar:hover {
        box-shadow: 3px 3px 0px #666;
    }
    
    .btn-comenzar:active {
        transform: translate(4px, 4px);
    }
}