mail/src/sass/views/_mail-list.scss

.view-mail-list {
    $padding-horizontal: 15px;
    $padding-vertical: 10px;
    position: relative;
    height: 100%;
    width: 100%;
    background: $color-grey-lighterer;
    background-image: linear-gradient(to right ,$color-grey-lighterer 98%, darken($color-grey-lighterer, 1%) 100%);

    header {
        cursor: pointer;
        padding: $padding-vertical $padding-horizontal;
        text-shadow: 0px 1px 1px $color-grey-lighter;
        &:before {
            color: $color-blue;
            font-size: $font-size-bigger;
            margin-right: 0.5em;
            vertical-align: middle;
        }
        h2 {
            margin: 0;
            display: inline;
            color: $color-grey-dark;
            font-size: $font-size-bigger;
            font-weight: normal;
            vertical-align: middle;
        }

    }

    .search {
        padding: 0 $padding-horizontal $padding-vertical $padding-horizontal;
        margin: 0 auto;
        width: 100%;
    }

    .list-wrapper {
        height: 100%;
        padding: 0 $padding-horizontal;
        overflow-y: hidden;
    }

    ul {
        padding-bottom: 126px;
    }

    footer {
        height: 28px;
        cursor: pointer;
        position: absolute;
        bottom: 0px;
        left: 0px;
        padding: 0 $nav-padding;
        background: darken($color-grey-lighterer, 1%);
        width: 100%;
        font-size: $font-size-smaller;
        color: $color-grey-dark;
        line-height: em(28,12);

        .offline {
            &[data-icon]:before {
                padding-right: 0.5em;
            }
        }

        &.syncing {
            .spinner {
                top: 6.5px;
                left: $padding-horizontal;
                height: 13px;
                width: 13px;
                position: absolute;
                animation: rotation .6s linear infinite;
                border-left: 2px solid $color-grey-light;
                border-right: 2px solid $color-grey-light;
                border-bottom: 2px solid $color-grey-light;
                border-top: 2px solid $color-grey;
                border-radius: 100%;
            }
            .text {
                padding-left: 1.5em;
            }
        }
    }
}

@keyframes rotation {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(359deg);
    }
}