* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}
body {
    min-height: 100vh;
    background: url(background.png);
    background-size: cover;
    background-position: center;
}
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 80px;
    height: 100%;
    background: transparent;
    backdrop-filter: blur(40px);
    border-right: 2px solid rgba(255, 255, 255, .2);
    box-shadow: 0 0 10px rgba(0, 0, 0, .2);
    padding: 6px 14px;
    transition: .5s;
}
.sidebar.active {
    width: 260px;
}
.logo-menu {
    display: flex;
    align-items: center;
    width: 100%;
    height: 70px;
}
.piclogo {
    opacity: 0;
    transition: .3s;
}
.logo {
    font-size: 25px;
    color: white;
    pointer-events: none;
    opacity: 0;
    transition: .3s;
}
.sidebar.active .piclogo {
    opacity: 1;
    transition-delay: .2s;
}
.sidebar.active .logo {
    opacity: 1;
    transition-delay: .2s;
}
.logo-menu .toggle-btn {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 35px;
    height: 35px;
    font-size: 22px;
    color: white !important;
    text-align: center;
    line-height: 40px;
    cursor: pointer;
    transition: .5s;
}
.sidebar.active .logo-menu .toggle-btn {
    left: 90%;
}
.list {
    margin-top: 10px;
}
.list-item {
   list-style: none; 
   width: 100%;
   height: 50px;
   margin: 5px 0;
   line-height: 50px;
}
a {
   display: flex;
   align-items: center;
   font-size: 18px; 
   color: white;
   text-decoration: none;
   border-radius: 6px;
   white-space: nowrap;
   transition: .5s;
}
.list-item.active a, 
 a:hover {
    background: rgba(255, 255, 255, .2);
}
.list-item img {
    min-width: 30px;
    height: 30px;
    text-align: center;
    line-height: 50px;
    margin-right: 15px;
    margin-left: 8px;
}
.link-name {
    opacity: 0;
    pointer-events: auto;
    transition: opacity .3s;
}
.sidebar.active .link-name {
    opacity: 1;
    pointer-events: auto;
    transition-delay: calc(.1s * var(--i));
}