one-dark/gtk-3.0/sass/_libhandy.scss

/* Based on _Adwaita-base.scss from libhandy */

// HdyComboRow

popover.combo {
  padding: 0;

  list {
    background-color: transparent;

    > row {
      padding: 0 10px;
      min-height: 50px;

      &:first-child { @extend %linked_vertical_top; }
      &:last-child { @extend %linked_vertical_bottom; }
    }
  }

  overshoot.top { @extend %linked_vertical_top; }
  overshoot.bottom { @extend %linked_vertical_bottom; }

  scrollbar.vertical {
    //background-color: $_popover_bg;

    &:dir(ltr) { @extend %linked_right; }
    &:dir(rtl) { @extend %linked_left; }
  }
}

// HdyExpanderRow

row.expander {
  padding: 0px;

  &:checked image.expander-row-arrow:not(:disabled) {
    color: $selected_bg_color;
  }

  image.expander-row-arrow:disabled {
    color: $insensitive_fg_color;
  }
}

// HdyKeypad

keypad {
  .digit {
    font-size: 200%;
    font-weight: bold;
  }

  .letters {
    font-size: 70%;
  }

  .symbol {
    font-size: 160%;
  }
}

// HdyViewSwitcher

viewswitcher {
  &, & button {
    margin: 0;
    padding: 0;
  }

  button {
    border-radius: 0;
    border-top: 0;
    border-bottom: 0;

    &:not(:checked):not(:hover) {
      background: transparent;
      border-color: transparent;
    }

    &:checked, &:active {
      border-color: $selected_bg_color;
    }

    // View switcher button
    > stack > box {
      &.narrow {
        font-size: 0.75rem;
        padding-top: 7px;
        padding-bottom: 5px;

        image,
        label {
          padding-left: 8px;
          padding-right: 8px;
        }
      }

      &.wide {
        padding: 8px 10px;

        label {
          &:dir(ltr) {
            padding-right: 7px;
          }

          &:dir(rtl) {
            padding-left: 7px;
          }
        }
      }
    }

    &.needs-attention {
      > stack > box label {
        background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to($selected_bg_color), to(transparent));
        background-size: 6px 6px;
        background-repeat: no-repeat;
        background-position: right 0px;

        &:dir(rtl) {
          background-position: left 0px;
        }
      }

      &:active > stack > box label {
        background-image: -gtk-gradient(radial, center center, 0, center center, 0.5, to($selected_fg_color), to(transparent));
      }
    }
  }
}

// HdyViewSwitcherBar

viewswitcherbar actionbar > revealer > box {
  padding: 0;
}

// Content list

list.content {
  &,
  list {
    background-color: transparent;
  }

  // Nested rows background
  list.nested > row:not(:active) {
    &:not(:hover):not(:selected),
    &:hover:not(.activatable):not(:selected) {
      background-color: mix($bg_color, $base_color);
    }

    &:hover.activatable:not(:selected) {
      background-color: if($variant != 'dark', mix($base_color, black, 95%), mix($base_color, white, 97%));
    }
  }

  > row {
    // Regular rows and expander header rows background
    &:not(.expander):not(:active):not(:hover):not(:selected),
    &:not(.expander):not(:active):hover:not(.activatable):not(:selected),
    &.expander row.header:not(:active):not(:hover):not(:selected),
    &.expander row.header:not(:active):hover:not(.activatable):not(:selected) {
      background-color: $base_color;
    }

    &:not(.expander):not(:active):hover.activatable:not(:selected),
    &.expander row.header:not(:active):hover.activatable:not(:selected) {
      background-color: if($variant != 'dark', mix($base_color, black, 95%), mix($base_color, white, 97%));
    }

    &,
    list > row {
      border-color: $borders_color;
      border-style: solid;
      transition: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    // Top border
    &:not(:last-child) {
      border-width: 1px 1px 0px 1px;
    }

    // Rounded top
    &:first-child,
    &.expander:first-child row.header,
    &.expander:checked,
    &.expander:checked row.header,
    &.expander:checked + row,
    &.expander:checked + row.expander row.header {
      @extend %linked_vertical_top;
    }

    // Bottom border
    &:last-child,
    &.checked-expander-row-previous-sibling,
    &.expander:checked {
      border-width: 1px;
    }

    // Rounded bottom
    &:last-child,
    &.checked-expander-row-previous-sibling,
    &.expander:checked,
    &.expander:not(:checked):last-child row.header,
    &.expander:not(:checked).checked-expander-row-previous-sibling row.header,
    &.expander.empty:checked row.header,
    &.expander list.nested > row:last-child {
      @extend %linked_vertical_bottom;
    }

    // Add space around expanded rows
    &.expander:checked:not(:first-child),
    &.expander:checked + row {
      margin-top: 5px;
    }
  }
}

// Unified window

window.csd.unified:not(.solid-csd):not(.fullscreen):not(.tiled):not(.tiled-top):not(.tiled-bottom):not(.tiled-left):not(.tiled-right):not(.maximized) {
  &,
  > decoration,
  > decoration-overlay {
    border-radius: 3px;
  }
}

// HdyWindowHandle separator

.windowhandle separator.sidebar {
  &:dir(ltr), &.left, &.left:dir(rtl),
  &:dir(rtl), &.right {
    background-color: $header_border;
    margin: 0;
  }
}

hdyleaflet {
  &:last-child headerbar {
    border-top-right-radius: 8px;
  }
  &:first-child headerbar {
    border-top-left-radius: 8px;
  }
}