:root{
    --logo-size: 1.35rem;
}
@media (max-width: 600px){
    :root{
        --logo-size: 1.25rem;
    }
}


*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body{
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: 100;
    background: #212121;
    width: 100%;
    height: 100%;
}
canvas{
    display: block;
    width: 100%;
    height: 100%;
}

.instructions{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    color: #eee;
    font-size: var(--logo-size);
    font-weight: 100;
    letter-spacing: .15em;
    text-transform: uppercase;
    white-space: nowrap;
    z-index: 10;
    text-align: center;
}
.instructions a{
    color: inherit;
    text-decoration: none;
}

.copyright{
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    font-weight: 100;
    letter-spacing: .1em;
    z-index: 10;
    white-space: nowrap;
    text-align: center;
    width: 100%;
}
.copyright a{
    color: #7F7F7F;
    text-decoration: none;
    transition: color .3s ease;
}
.copyright a:hover{
    color: #eee;
}


@media (max-width: 600px){
    html .list-item .item-link:after{
        width: 30px;
    }
}

@media (max-width: 600px){
    .instructions{
        top: 45%;
        font-size: 1.1rem;
        letter-spacing: .1em;
    }
    
    /* 优化版权信息显示 */
    .copyright{
        bottom: 15px;
        font-size: 11px; 
        letter-spacing: .05em;
    }
    
    canvas{
        width: 100vw;
        height: 100vh;
        object-fit: cover;
    }
}

@media (max-width: 375px){
    .instructions{
        font-size: 1rem;
        letter-spacing: .08em;
    }
    
    .copyright{
        font-size: 10px;
    }
}