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diff --git a/assets/css/lib/bootstrap/_input-groups.scss b/assets/css/lib/bootstrap/_input-groups.scss
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+//
+// Input groups
+// --------------------------------------------------
+
+// Base styles
+// -------------------------
+.input-group {
+ position: relative; // For dropdowns
+ display: table;
+ border-collapse: separate; // prevent input groups from inheriting border styles from table cells when placed within a table
+
+ // Undo padding and float of grid classes
+ &[class*="col-"] {
+ float: none;
+ padding-left: 0;
+ padding-right: 0;
+ }
+
+ .form-control {
+ // Ensure that the input is always above the *appended* addon button for
+ // proper border colors.
+ position: relative;
+ z-index: 2;
+
+ // IE9 fubars the placeholder attribute in text inputs and the arrows on
+ // select elements in input groups. To fix it, we float the input. Details:
+ // https://github.com/twbs/bootstrap/issues/11561#issuecomment-28936855
+ float: left;
+
+ width: 100%;
+ margin-bottom: 0;
+ }
+}
+
+// Sizing options
+//
+// Remix the default form control sizing classes into new ones for easier
+// manipulation.
+
+.input-group-lg > .form-control,
+.input-group-lg > .input-group-addon,
+.input-group-lg > .input-group-btn > .btn {
+ @extend .input-lg;
+}
+.input-group-sm > .form-control,
+.input-group-sm > .input-group-addon,
+.input-group-sm > .input-group-btn > .btn {
+ @extend .input-sm;
+}
+
+
+// Display as table-cell
+// -------------------------
+.input-group-addon,
+.input-group-btn,
+.input-group .form-control {
+ display: table-cell;
+
+ &:not(:first-child):not(:last-child) {
+ border-radius: 0;
+ }
+}
+// Addon and addon wrapper for buttons
+.input-group-addon,
+.input-group-btn {
+ width: 1%;
+ white-space: nowrap;
+ vertical-align: middle; // Match the inputs
+}
+
+// Text input groups
+// -------------------------
+.input-group-addon {
+ padding: $padding-base-vertical $padding-base-horizontal;
+ font-size: $font-size-base;
+ font-weight: normal;
+ line-height: 1;
+ color: $input-color;
+ text-align: center;
+ background-color: $input-group-addon-bg;
+ border: 1px solid $input-group-addon-border-color;
+ border-radius: $border-radius-base;
+
+ // Sizing
+ &.input-sm {
+ padding: $padding-small-vertical $padding-small-horizontal;
+ font-size: $font-size-small;
+ border-radius: $border-radius-small;
+ }
+ &.input-lg {
+ padding: $padding-large-vertical $padding-large-horizontal;
+ font-size: $font-size-large;
+ border-radius: $border-radius-large;
+ }
+
+ // Nuke default margins from checkboxes and radios to vertically center within.
+ input[type="radio"],
+ input[type="checkbox"] {
+ margin-top: 0;
+ }
+}
+
+// Reset rounded corners
+.input-group .form-control:first-child,
+.input-group-addon:first-child,
+.input-group-btn:first-child > .btn,
+.input-group-btn:first-child > .btn-group > .btn,
+.input-group-btn:first-child > .dropdown-toggle,
+.input-group-btn:last-child > .btn:not(:last-child):not(.dropdown-toggle),
+.input-group-btn:last-child > .btn-group:not(:last-child) > .btn {
+ @include border-right-radius(0);
+}
+.input-group-addon:first-child {
+ border-right: 0;
+}
+.input-group .form-control:last-child,
+.input-group-addon:last-child,
+.input-group-btn:last-child > .btn,
+.input-group-btn:last-child > .btn-group > .btn,
+.input-group-btn:last-child > .dropdown-toggle,
+.input-group-btn:first-child > .btn:not(:first-child),
+.input-group-btn:first-child > .btn-group:not(:first-child) > .btn {
+ @include border-left-radius(0);
+}
+.input-group-addon:last-child {
+ border-left: 0;
+}
+
+// Button input groups
+// -------------------------
+.input-group-btn {
+ position: relative;
+ // Jankily prevent input button groups from wrapping with `white-space` and
+ // `font-size` in combination with `inline-block` on buttons.
+ font-size: 0;
+ white-space: nowrap;
+
+ // Negative margin for spacing, position for bringing hovered/focused/actived
+ // element above the siblings.
+ > .btn {
+ position: relative;
+ + .btn {
+ margin-left: -1px;
+ }
+ // Bring the "active" button to the front
+ &:hover,
+ &:focus,
+ &:active {
+ z-index: 2;
+ }
+ }
+
+ // Negative margin to only have a 1px border between the two
+ &:first-child {
+ > .btn,
+ > .btn-group {
+ margin-right: -1px;
+ }
+ }
+ &:last-child {
+ > .btn,
+ > .btn-group {
+ margin-left: -1px;
+ }
+ }
+}