header {
    height: 55px;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    z-index: 10;
    background-color: white;
    border-bottom: 1px solid rgb(230, 230, 230);
}

.left-section {
    display: flex;
    align-items: center;
} .hamburger-menu {
    height: 24px;
    margin: 0px 24px;
} .youtube-logo {
    height: 20px;
}

.middle-section {
    flex: 1;
    margin: 0px 35px 0px 70px;
    max-width: 500px;
    display: flex;
    align-items: center;
} .search-bar {
    flex: 1;
    height: 36px;
    padding-left: 10px;
    font-size: 16px;
    border: 1px solid rgb(190, 190, 190);
    border-radius: 2px;
    box-shadow: inset 1px 2px 3px rgba(0, 0, 0, 0.05);
    width: 0;
} .search-bar::placeholder {
    font-size: 16px;
} .search-button, .voice-search-button, .upload-icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
} .search-button {
    height: 39px;
    width: 65px;
    background-color: rgb(240, 240, 240);
    border: 1px solid rgb(190, 190, 190);
    margin: 0px 10px 0px -1px;
} .voice-search-button {
    height: 40px;
    width: 40px;
    border-radius: 20px;
    border: none;
    background-color: rgb(245, 245, 245);
} .search-icon, .voice-search-icon {
    height: 24px;
} .tooltip {
    position: absolute;
    background-color: gray;
    color: white;
    padding: 4px 8px;
    border-radius: 2px;
    font-size: 12px;
    bottom: -30px;
    opacity: 0;
    transition: opacity 0.15s;
    pointer-events: none;
    white-space: nowrap;
} .search-button:hover .tooltip, .voice-search-button:hover .tooltip, .upload-icon-container:hover .tooltip, .youtube-logo-container:hover .tooltip {
    opacity: 1;
}

.right-section {
    width: 180px;
    margin-right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
} .upload-icon, .youtube-apps-icon, .notifications-icon {
    height: 24px;
} .notifications-icon-container {
    position: relative;
} .notifications-count {
    position: absolute;
    top: -2px;
    right: -5px;
    background-color: rgb(200, 0, 0);
    color: white;
    font-size: 11px;
    padding: 2px 5px;
    border-radius: 10px;
} .user-profile-picture {
    height: 32px;
    border-radius: 16px;
}