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

// Container for mail list entries
.mail-list {
    $padding-horizontal: 15px;
    $padding-vertical: 15px;
    $footer-height: 30px;

    // do not share any common styles between large and other screens
    // because styling is very different

    @include respond-to(smaller-lg) {
        display: flex;
        flex-direction: column;
        height: 100%;
        width: 100%;
        background: $color-bg;
        color: $color-text;

        & > header {
            position: relative;
            flex-shrink: 0;
            padding: $padding-vertical $padding-horizontal;
            cursor: pointer;

            .btn-navicon {
                float: left;
                margin-right: 1em;
            }
            h2 {
                @include scut-truncate;
                padding-top: 4px; // depends on height of .btn-navicon
                padding-right: 50px; // depends on with of .btn-icon
                color: $color-text;
                font-size: $font-size-bigger;
                font-weight: normal;
            }
            .btn-icon-light {
                position: absolute;
                top: $padding-vertical;
                right: $padding-horizontal;
                padding-left: 1em;
                & > svg {
                    width: 2em;
                    height: 2em;
                }
            }

            &.wo-touch-active {
                background: $color-touch-active;
            }
        }
        &__search {
            flex-shrink: 0;
            padding: 0 $padding-horizontal 10px;
        }

        &__scroll-canvas {
            flex-grow: 1;
            padding: 0 $padding-horizontal;
            overflow-y: scroll;
            // allow scrolling on iOS
            -webkit-overflow-scrolling: touch;
            // put layer on GPU
            transform: translateZ(0);

            // hide scrollbar in webkit
            &::-webkit-scrollbar {
                display: none;
            }
        }
        &__entries {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        & > footer {
            flex-shrink: 0;
            position: relative;
            height: $footer-height;
            padding: 0 $padding-horizontal;
            background: $color-bg;
            width: 100%;
            font-size: $font-size-smaller;
            color: $color-text;
            line-height: $footer-height;

            &:before {
                content: '';
                display: block;
                height: 0;
                border-top: 1px solid $color-border-light;
            }
            svg {
                display: inline-block;
                height: 1.5em;
                width: 1.5em;
                padding-right: 0.5em;
                fill: $color-text;
                vertical-align: middle;
            }
        }
    }
    @include respond-to(md) {
        & > header {
            padding: $padding-vertical $padding-horizontal;
            h2 {
                padding-right: 0;
            }
            .btn-icon-light {
                display: none;
            }
        }
    }

    @include respond-to(lg) {
        height: 100%;
        background: $color-bg-dark;

        & > header {
            display: none;
        }
        &__search {
            display: none;
        }
        & > footer {
            display: none;
        }
        &__scroll-canvas {
            height: 100%;
            overflow-y: scroll;
            // allow scrolling on iOS
            -webkit-overflow-scrolling: touch;

            // hide scrollbar in webkit
            &::-webkit-scrollbar {
                display: none;
            }
        }
        &__entries {
            display: table; // import for mail list entry desktop layout
            table-layout: fixed;
            width: 100%;
            list-style: none;
            margin: 0;
            padding: 0;
        }
    }
}

// Individual mail list entries with several states
.mail-list-entry {
    // do not share any common styles between large and other screens
    // because styling is very different

    @include respond-to(smaller-lg) {
        $padding-horizontal: 30px;
        $padding-vertical: 11px;

        position: relative;
        display: block;
        padding: $padding-vertical $padding-horizontal;
        cursor: pointer;
        margin-top: 11px;

        &:before {
            content: '';
            display: block;
            position: absolute;
            top: -6px;
            left: 0;
            right: 0;
            height: 0;
            border-top: 1px solid $color-border-light;
        }

        &:first-child {
            margin-top: 0;
            &:before {
                display: none;
            }
        }
        &:last-child {
            margin-bottom: 5px;
        }

        // Flags

        &__flags {
            position: absolute;
            top: $padding-vertical;
            left: 0;
            list-style: none;
            margin: 0;
            padding: 0;
            width: $padding-horizontal;
            line-height: 22px; // roughly valign with lines of main content
            & > li {
                font-size: 90%;
                text-align: center;
                & > svg {
                    display: inline-block;
                    vertical-align: middle;
                    width: 1em;
                    height: 1em;
                }
            }
        }
        &__flags-unread {
            display: none; // hidden in default state
            &:after {
                display: inline-block;
                content: '';
                width: 1em;
                height: 1em;
                border-radius: 50%;
                background-color: $color-main;
                vertical-align: middle;
            }
        }
        &__flags-checked {
            display: none; // feature on touch layout not available for now
        }
        &__flags-favorite {
            display: none; // feature on touch layout not available for now
        }
        &__flags-encrypted {
            display: none; // hidden on touch layout
        }
        &__flags-answered > svg {
            fill: $color-text-light;
        }
        &__flags-attachment {
            display: none; // hidden in default state
            & > svg {
                fill: $color-text-light;
            }
        }
        &__attachment {
            display: none; // hidden on touch layout
        }
        &__encrypted {
            position: absolute;
            top: $padding-vertical;
            right: $padding-vertical;
            text-align: center;
            font-size: 90%;
            & > svg {
                display: inline-block;
                vertical-align: middle;
                width: 1.2em;
                height: 1.2em;
                fill: $color-main;
            }
        }

        // Main content

        &__name {
            @include scut-truncate;
            color: $color-main;
            font-size: $font-size-bigger;
            font-weight: normal;
            line-height: 1;
            padding-bottom: 8px;
            padding-right: 0.5em;
        }
        &__subject {
            @include scut-truncate;
            font-size: $font-size-small;
            line-height: $font-size-small;
            font-weight: bold;
            padding-right: 90px; // to make room for time
            padding-bottom: 8px;
            & > span {
                display: none;
            }
        }
        &__time {
            @include scut-truncate;
            position: absolute;
            top: $padding-vertical + $font-size-bigger + 8px;
            right: $padding-horizontal;
            width: 80px;
            color: $color-text-light;
            font-size: $font-size-smaller;
            line-height: $font-size-small; // same line height as subject
            text-align: right;
        }
        &__excerpt {
            color: $color-grey;
            height: 2 * $line-height-base * 1em;
            font-size: $font-size-small;
            overflow: hidden;
        }

        // Modifiers

        &:hover {
            background-color: rgba($color-main, 0.15);
        }
        &--unread {
            .mail-list-entry__flags-unread {
                display: block;
            }
        }
        &--attachment {
            .mail-list-entry__flags-attachment {
                display: block;
            }
        }
        &--active,
        &--active:hover {
            background-color: $color-main;
            color: $color-main-text;
            .mail-list-entry__name,
            .mail-list-entry__time,
            .mail-list-entry__excerpt {
                color: $color-main-text;
            }
            .mail-list-entry__flags-unread:after {
                background-color: $color-main-text;
            }
            .mail-list-entry__flags-answered > svg,
            .mail-list-entry__flags-encrypted > svg,
            .mail-list-entry__flags-attachment > svg,
            .mail-list-entry__encrypted > svg,
            .mail-list-entry__encrypted > svg:first-child {
                fill: $color-main-text;
            }
        }
    }

    @include respond-to(lg) {
        $cell-padding-vertical:         10px;
        $cell-padding-horizontal:       10px;

        display: table-row;
        background: $color-bg-dark;
        color: $color-grey;
        cursor: pointer;

        // Flags

        &__flags {
            display: table-cell;
            box-sizing: content-box;
            border-bottom: 1px solid $color-border-light;
            padding: $cell-padding-vertical $cell-padding-horizontal;
            list-style: none;
            width: 8em;
            white-space: nowrap;
            & > li {
                display: inline-block;
                margin-left: 0.5em;
                & > svg {
                    display: inline-block;
                    vertical-align: middle;
                    width: 1em;
                    height: 1em;
                }
            }
        }
        &__flags-unread {
            display: none;
        }
        &__flags-checked {
            margin-left: 0 !important;
            .checkbox {
                vertical-align: middle;

                // add invisible padding to increase clickable area around checkbox
                margin: -0.5em 0 -0.5em -1em;
                padding: 0.5em 0 0.5em 1em;
            }
        }
        &__flags-favorite {
            // add invisible padding to increase clickable area around star
            margin: -0.5em 0 -0.5em;
            padding: 0.5em 0 0.5em;

            & > svg {
                fill: $color-text-light;
                &:first-child {
                    fill: $color-main;
                }
                &:hover {
                    fill: $color-text;
                    &:first-child {
                        fill: darken($color-main, 10%);
                    }
                }
            }
        }
        &__flags-encrypted > svg {
            fill: $color-main;
        }
        &__flags-answered > svg {
            fill: $color-text-light;
        }
        &__flags-attachment {
            display: none !important; // hidden on desktop layout
        }
        &__attachment {
            display: table-cell;
            box-sizing: content-box;
            border-bottom: 1px solid $color-border-light;
            padding: $cell-padding-vertical $cell-padding-horizontal;
            width: 1em;
            & > svg {
                visibility: hidden; // hidden in default state
                display: inline-block;
                vertical-align: middle;
                width: 1em;
                height: 1em;
                fill: $color-text-light;
            }
        }

        // Main content

        &__name {
            @include scut-truncate;
            display: table-cell;
            border-bottom: 1px solid $color-border-light;
            padding: $cell-padding-vertical $cell-padding-horizontal;
            width: 16em;
        }
        &__subject {
            @include scut-truncate;
            display: table-cell;
            border-bottom: 1px solid $color-border-light;
            padding: $cell-padding-vertical $cell-padding-horizontal;
            & > strong {
                font-weight: normal;
            }
            & > span {
                margin-left: 0.2em;
                color: $color-text-light;
                &:before {
                    content: '-';
                    margin-right: 0.2em;
                }
            }
        }
        &__time {
            display: table-cell;
            border-bottom: 1px solid $color-border-light;
            padding: $cell-padding-vertical $cell-padding-horizontal;
            width: 8em; // make room for time
            text-align: right;
            white-space: nowrap;
        }
        &__excerpt {
            display: none; // hidden on desktop layout
        }
        &__encrypted {
            display: none; // hidden on desktop layout
        }

        // Modifiers

        &:hover {
            background-color: mix($color-bg, $color-main, 85%);
        }
        &--unread {
            background-color: $color-bg;
            font-weight: bold;
            .mail-list-entry__name {
                font-weight: bold;
            }
            .mail-list-entry__subject {
                font-weight: normal;
                & > strong {
                    font-weight: bold;
                }
            }
        }
        &--attachment {
            .mail-list-entry__attachment > svg {
                visibility: visible;
            }
        }
        &--checked {
            background-color: mix($color-bg, $color-main, 85%);
        }
    }
}