index.css

body {
    margin: 0;
    font-family: Roboto;
    padding-bottom: 100px;
    background-color: #f9f9f9;
}

#navbar {
    display: flex;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
    height: 56px;
    justify-content: space-between;
    position: fixed;
    width: 100%;
    top: 0;
    background-color: white;
    z-index: 100;

}

#left-navbar {
    display: flex;
    align-items: center;
    padding-left: 23px;
}

#center-navbar {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
    width: 0;
}

#right-navbar {
    display: flex;
    align-items: center;


}

#input-search {
    width: 500px;
    height: 32px;
    border: 1px solid rgba(0, 0, 0, 0.3);
    box-shadow: inset 1px 1px 2px rgba(0, 0, 0, 0.2);

}

#input-search::placeholder {
    font-size: larger;
    padding-left: 10px;
}

#main-wrapper {
    margin-top: 100px;
    margin-left: 50px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-column-gap: 15px;
    grid-row-gap: 50px;
    padding-right: 50px;
    padding-left: 50px;

    padding-bottom: 200px;

}

#video-wrapper {
    display: inline-block;
    width: 100%;
}

#video-info-grid {
    display: flex;
    padding-top: 10px;

}

#video-description {

    max-width: 390px;
}

#video-description h2 {
    width: 1fr;
    margin: 0;
    font-size: 15px;
    padding-bottom: 15px;
    padding-left: 20px
}

#video-description p {
    margin: 0;
    padding-left: 20px;
    width: 100%;
    line-height: 23px;
    font-size: 15px;
}

#sidebar {
    background-color: white;
    position: fixed;
    left: 0;
    top: 56px;
    width: 75px;
    height: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding-top: 30px;
    padding-bottom: 100%;

}

.sidebar-container p {
    font-size: 11px;
    margin: 0;
    text-align: center;
    padding-top: 7px;
}

.sidebar-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 600px;
}

.sidebar-container:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

#navbar-upload-icon {
    position: relative;
    display: flex;
    justify-content: center;
}

#navbar-upload-icon .icon-tooltip {
    position: absolute;
    top: 44px;
    right: 2px;
    background-color: rgba(0, 0, 0, 0.5);
    padding-top: 4px;
    padding-bottom: 4px;
    padding-left: 4px;
    padding-right: 4px;
    color: white;
    opacity: 0;
    z-index: 1;
    transition: opacity 0.20s;
    border-radius: 2px;
    pointer-events: none;
}

#navbar-upload-icon:hover .icon-tooltip {
    opacity: 1;

}

.video-time {
    position: absolute;
    bottom: 11px;
    right: 8px;
    background-color: black;
    color: white;
    font-size: 13px;
    padding-left: 4px;
    padding-right: 4px;
    padding-top: 3px;
    padding-bottom: 3px;
    border-radius: 2px;
}

@media (max-width:600px) {
    #main-wrapper {
        grid-template-columns: 1fr 1fr;
    }

    #video-description h2 {
        font-size: 1px;
    }

    #video-description p {
        font-size: 10px;
        line-height: normal;
    }

    #channel-icon {
        height: 1fr;
    }

    .author-icon {
        scale: 0.8;
    }

}

@media (max-width:800px) {
    #main-wrapper {
        grid-template-columns: 1fr 1fr 1fr;
    }

    #video-description h2 {
        font-size: 12px;
    }
}

@media (max-width:1300px) {
    #main-wrapper {
        grid-template-columns: 1fr 1fr 1fr;
    }

    #video-description h2 {
        font-size: 11px;
    }

    #video-description p {
        font-size: 10px;
    }
}

@media (max-width:400px) {
    #main-wrapper {
        grid-template-columns: 1fr;
    }

    #video-description h2 {
        font-size: 10px;
    }
}