.hero{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    margin-top: 100px;
}
.hero h1{
    color: var(--primary);
    font-size: 5rem;
    margin-bottom: 50px;
    line-height: 100%;
    text-align: center;
}
.hero h2{
    color: var(--secondary);
    margin-bottom: 75px;
    text-align: center;
}
button.play{
    transform: scale(1.2);
}

.intro{
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 150px;
}
.intro div{
    max-width: 750px;
    background-color: var(--background0);
    border-radius: 8px;
    padding: 30px 35px;
    border: 2px solid transparent;
    background: linear-gradient(var(--background0), var(--background0)) padding-box, linear-gradient(to bottom, var(--primary), var(--secondary) 80%, rgba(80, 0, 255, 1)) border-box;
}

.advantages, .techniques, .goals, .start-now{
    margin-top: 200px;
}
.advantages .top, .techniques .top, .goals .top, .start-now .top{
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 50px;
}
.advantages .top h1, .impressions .top h1, .techniques .top h1, .goals .top h1, .start-now .top h1{
    text-align: center;
}
.list-grid{
    display: grid;
    grid-template-columns: auto auto;
    gap: 5em 6em;
    justify-content: center;
    flex-wrap: wrap;
}
.list{
    display: flex;
    gap: 50px;
    justify-content: center;
    flex-wrap: wrap;
}
.list .element, .list-grid .element{
    padding: 30px 35px;
    max-width: 425px;
    border-radius: 8px;
    background-color: var(--background0);
    border: 2px solid transparent;
    background: linear-gradient(var(--background0), var(--background0)) padding-box, linear-gradient(to bottom, rgb(255, 0, 175), var(--secondary) 80%, rgba(80, 0, 255, 1)) border-box;
}
.list .element p, .list-grid .element p{
    text-align: justify;
}
.list :nth-child(2n):not(p), .list-grid :nth-child(2n):not(p){
    background: linear-gradient(var(--background0), var(--background0)) padding-box, linear-gradient(to bottom, var(--primary), var(--secondary) 80%, rgba(80, 0, 255, 1)) border-box;
}

.impressions{
    margin-top: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.impressions .top{
    margin-bottom: 50px;
}
.impressions .navigation{
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 6px var(--box-shadow);
    border-radius: 8px;
}
.impressions .navigation .content{
    position: absolute;
    width: 100%;
    height: 225px;
    bottom: 0;
    background-image: linear-gradient(to top, rgba(0, 0, 0, 0.85) 65%, rgba(0, 0, 0, 0.1) 90%, transparent);
    color: var(--font-tertiary);
    padding: 30px 75px;
    border-radius: 8px;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.impressions .navigation .content p{
    color: var(--gray);
    max-width: 850px;
}
.impressions .navigation .images img{
    object-fit: cover;
}
.impressions .navigation .left, .impressions .navigation .right{
    height: 150px;
    font-size: 25px;
    padding: 0 15px;
    background-image: linear-gradient(110deg, rgba(255, 255, 255, 0.5), rgba(150, 150, 150, 0.5));
    background-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    box-shadow: 0 0 6px var(--box-shadow);
    border: none;
    border-radius: 90px;
    position: absolute;
    color: var(--font-tertiary);
    z-index: 2;
} 
.impressions .navigation .left:hover, .impressions .navigation .right:hover{
    background-color: rgba(255,255,255, 0.8);
    height: 100%;
    border-radius: 8px;
    padding: 0 25px;
}
.impressions .navigation .left{
    left: 10px;
}
.impressions .navigation .right{
    right: 10px;
}
.impressions .navigation .left:hover{
    left: -1px;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}
.impressions .navigation .right:hover{
    right: -1px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}
.impressions .mobile-navigation{
    display: flex; 
    gap: 10px;
    padding: 10px 0;
    width: 100%;
}
.impressions .mobile-navigation button{
    width: 100%;
    /* font-size: 18px; */
}
.start-now .content{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 10px;
}
.start-now .content button{
    transform: scale(1.25);
}



/* background */
.gradient-background{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -5;
    overflow: hidden;
}
.gradient-sphere{
    position: fixed;
    border-radius: 50%;
    filter: blur(40px);
    animation: sphere-spinning 10s linear infinite;
}
@keyframes sphere-spinning {
    0%{
        transform: rotateZ(0deg) scale(1);
    }
    50%{
        transform: rotateZ(180deg) scale(1.15);
    }
    100%{
        transform: rotateZ(360deg) scale(1);
    }
}
.sphere-1{
    width: 500px;
    height: 500px;
    background: linear-gradient(100deg, rgba(0, 255, 128, 0.6), rgba(0, 238, 255, 0.6));
    top: 15%;
    left: -5%;
}
.sphere-2{
    width: 800px;
    height: 800px;
    background: linear-gradient(200deg, rgba(255, 0, 255, 0.6), rgba(75, 0, 255, 0.6));
    bottom: -20%;
    right: -15%;
}
.sphere-3{
    width: 500px;
    height: 500px;
    background: linear-gradient(100deg, rgba(0, 175, 255, 0.6), rgba(75, 0, 255, 0.6));
    top: 60%;
    left: 25%;
}
.noise-overlay{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    z-index: -4;
}
.grid-overlay{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: 40px 40px;
    background-image: 
        linear-gradient(to right, rgba(0, 0, 0, 0.1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.1) 1px, transparent 1px);
    z-index: -2;
}
.glow{
    position: absolute;
    width: 40vw;
    height: 40vh;
    background: radial-gradient(circle, rgba(72, 0, 255, 0.15), transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -2;
    animation: pulse 8s infinite alternate;
    filter: blur(30px);
}
.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    pointer-events: none;
}
.particle {
    position: absolute;
    background: white;
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
}