minio/browser/app/less/inc/header.less

// Base
.header {
    z-index: @header-z-index;
}

// Toolbar
.toolbar {
    background-color: @toolbar-bg;
    height: @toolbar-height;
    display: flex;
    align-items: center;

    @media(min-width: @screen-sm-min) {
        padding: 0 1.25rem 0;
    }

    @media(max-width: @screen-xs-max) {
        padding: 0 0.7rem;
    }
}

.toolbar__item {
    &:not(.toolbar__item--alt) {
        color: @text-color;
        font-size: 1.25rem;
        width: 2.6rem;
        height: 2.6rem;
        border-radius: 50%;
        text-align: center;
        vertical-align: middle;
        display: inline-block;
        margin: -0.1rem 0 0 0.5rem;

        &:not(:disabled) {
            cursor: pointer;
            .transition(all);
            .transition-duration(300ms);

            &:hover {
                background-color: fade(@white, 50%);
                color: darken(@text-color, 10%);
            }
        }

        &:disabled {
            opacity: 0.3;
        }

        &:first-child {
            margin-left: 0;
        }
    }
}

.toolbar__item--alt {
    align-self: center;
    margin-left: 0.75rem;
}

.toolbar__end {
    margin: 0 -0.5rem 0 auto;
    display: flex;
    align-content: center;
}