@import url(../css/variables.css);
@import url('https://fonts.googleapis.com/css2?family=Orbitron&display=swap');

body {
    margin: 0;
    height: auto;
}

.tunnel {
    background-color: var(--nigth);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    perspective: 700px;
    overflow: hidden;
}

.rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform-style: preserve-3d;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px solid var(--cyan-rgb);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--cyan-rgb);
    opacity: 1;
    transition: opacity 0.5s, filter 0.5s;
    filter: blur(0px);
}

.ring:nth-child(3) { border-color: var(--fuchsia); box-shadow: 0 0 10px var(--fuchsia); }
.ring:nth-child(4) { border-color: var(--electric-violet); box-shadow: 0 0 10px var(--electric-violet); }
.ring:nth-child(5) { border-color: var(--fuchsia); box-shadow: 0 0 10px var(--fuchsia); }
.ring:nth-child(6) { border-color: var(--electric-violet); box-shadow: 0 0 10px var(--electric-violet); }
.ring:nth-child(7) { border-color: var(--fuchsia); box-shadow: 0 0 10px var(--fuchsia); }
.ring:nth-child(8) { border-color: var(--electric-violet); box-shadow: 0 0 10px var(--electric-violet); }
.ring:nth-child(9) { border-color: var(--fuchsia); box-shadow: 0 0 10px var(--fuchsia); }
.ring:nth-child(10) { border-color: var(--electric-violet); box-shadow: 0 0 10px var(--electric-violet); }

.center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1);
    color: var(--lavander-web);
    font-size: 2.7vw;
    font-family: "Orbitron", Arial, sans-serif;
    text-shadow: 0 0 20px var(--cyan-rgb), 0 0 40px var(--fuchsia);
    opacity: 1;
    pointer-events: none;
    transition: opacity 0.5s, transform 0.5s;
    z-index: 10;
    user-select: none;
    white-space: nowrap;
}

#centerText::before {
    content: "Press SPACE to START";
    font-weight: bold;
    display: inline-block;
}

.background-final {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url(../assets/img/background.jpg) no-repeat center center fixed;
    background-size: cover;
    background-color: var(--nigth);
    opacity: 0;
    transition: opacity 0.5s;
    z-index: 20;
    pointer-events: none;
}

@media (max-width: 1250px) {
    #centerText {
        font-size: 5vw;
        text-shadow: 0 0 10px var(--cyan-rgb), 0 0 20px var(--fuchsia);
    }
    #centerText::before {
        content: "Continúe desplazando";
        font-weight: bold;
        display: inline-block;
    }
}