SASS/COMPASS code

gistfile1.css

// buttons look simple
button {
    margin: 0;
    padding: 0;
    background: none;
    border: 0;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

//Inner padding and border oddities in FF
button::-moz-focus-inner {
    padding: 0;
    border: 0;
}

.oBtn {
    cursor: pointer;
    border: none;
    display: inline-block;
    background: transparent;
    font: bold 13px sans-serif;
    line-height: 24px;
    border-radius:6px;
    background-clip: padding-box;
    padding: 5px 14px 3px;
    outline: none;
    &.isDisabled, &[disabled], &.isDisabled:active, &[disabled]:active, &.isDisabled:hover, &[disabled]:hover {
        color: #a7a7a2;
        border: 1px solid #e0e0de;
        @include box-shadow(none);
        text-shadow: none;
        background: #f0f0ee;
        cursor: default;
    }
    &:hover {
        text-decoration: none;
    }
    -webkit-font-smoothing: antialiased;
    font-smoothing: always;
}

.oBtnPrimary {
    color: #ffffff;
    @include background-with-css2-fallback(#7ada4a linear-gradient(top, #7ada4a, #62c831 95%, #53bf29));
    border: 1px solid #509e19;
    border-bottom-color: #198d0f;
    border-top-color: #6dbe38;
    @include box-shadow(0px 1px 3px rgba(38,151,72, .5), inset 0px 1px 0px rgba(159,230,98,1));
    text-shadow: 0px 1px 0px rgba(37,168,17,1);
    height: 34px;
    &:hover {
        @include background-with-css2-fallback(#93dd64 linear-gradient(top, #93dd64, #72d239 95%, #6fcc37));
        @include box-shadow(0px 1px 3px rgba(38,151,72, .5), inset 0px 1px 0px rgba(173,236,102,1));
        border: 1px solid #6dbe38;
        border-bottom: 1px solid #198d0f;
    }
    &:active {
        @include background-with-css2-fallback(#6ec54f linear-gradient(top, #6ec54f, #56b92d));
        border: 1px solid #239365;
        @include box-shadow(none);
    }
}

.oBtnVisitorPrimary {
    @extend .oBtnPrimary;
}

.oBtnSecondary {
    color: #636360;
    @include background-with-css2-fallback(#f1f1ee linear-gradient(top, #f1f1ee, #e3e3e1 95%, #dddddb));
    border: 1px solid #cdcdc6;
    border-bottom: 1px solid #B2AFB4;
    @include box-shadow(0px 2px 2px rgba(0,0,0,0.1));
    text-shadow: 0px 1px 0px rgba(255,255,255,.8);
    //set height, because ff doesn't not allow to change line-height in inputs https://bugzilla.mozilla.org/show_bug.cgi?id=349259
    height: 34px;
    &:hover {
        color: #6d696f;
        @include background-with-css2-fallback(#f5f5f4 linear-gradient(top, #f5f5f4, #e8e8e6 95%, #dededd));
        border: 1px solid #ccc9d0;
        border-bottom-color: #b2afb4;
        text-shadow: 0px 1px 0px rgba(255,255,255,.8);
    }
    &:active {
        color: #6d696f;
        background: #CECECB;
        border: 1px solid #b1b1ae;
        @include box-shadow(none);
        text-shadow: 0 1px 0 rgba(255,255,255,.4);
    }
}

.oBtnTertiary, .oBtnCancel {
    @extend a;
    padding: 16px 8px 14px;
    font-size: 13px;
    font-weight: bold;
}

.oBtnLarge + .oBtnCancel {
    font-size: 14px;
}

.oBtnSubtle {
    @extend a;
    border-radius: 5px;
    padding: 5px 8px 6px;
    font-size: 11px;
    font-weight: bold;
    border: 2px solid #CCC;
    line-height: 1;
}

.oBtnFavorite {
    @extend .oActionLink;
    &:before {
        margin-right: 5px;
        @extend .oFavoriteIcon;
    }
    &:hover:before {
        @extend .oFavoriteIcon:hover;
    }
}

.oBtnFavoriteAdd {
    @extend .oBtnFavorite;
}

.oBtnFavoriteEdit {
    @extend .oBtnFavorite;
    &:before {
       @extend .oFavoriteSavedIcon;
    }
    &:hover:before {
       @extend .oFavoriteSavedIcon;
    }
}

// Jumbo Button
.oBtnJumbo {
    margin-bottom: 33px;
    display: block;
    font-size: 18px;
    padding: 12px 24px;
    font-weight: 600;
    height: 50px;
}

.oBtnLarge {
    height: 46px;
    font-size: 14px;
    padding: 11px 18px 9px;
}

.oBtnSubtle {
    @extend a;
    border-radius: 5px;
    padding: 0 8px;
    font-size: 11px;
    font-weight: bold;
    border: 2px solid #CCC;
    line-height: 24px;
    height: 26px;
}

// Multi-part Buttons (extends ul)
$multi-button-border-radius: 6px;
.oMultiButton {

  >li {
    @include inline-block;
    zoom: 1;
    border: none;
    padding: 0;
  }

  >li:first-child button {
    margin: 0;
    @include border-radius($multi-button-border-radius 0 0 $multi-button-border-radius);
  }

  >li:last-child button {
    margin-left: -1px;
    @include border-radius(0 $multi-button-border-radius $multi-button-border-radius 0);
  }

  >li button {
    margin: 0 0 0 -1px;
    @include border-radius(0);
  }
}

.oBtnClose {
    cursor: pointer;
    @extend .oPopupDarkCloseIcon;
    &:hover {
        @extend .oPopupDarkCloseIcon:hover;
    }
}

.oBtnCloseSmall {
  font-size: 17px;
  font-family: monospace;
  font-weight: bold;
  color: darken($background-color, 42);
  margin-left: 5px;
  &:before {
    display: inline-block;
    content: "×";
  }
}


.oBtnInline {
    padding: 4px 14px;
}

.oBtnSml {
    padding: 1em;
    font-size: .9em;
}

.oBtnCloseMessage {
    @extend .oBtnCloseSmall;
    @include opacity(0.5);
    &:hover {
        @include opacity(1);
    }
}

.oBtnPopup {
    @extend a;
}

.oBtnChat {
    display: block;
    width: 225px;
    margin-top: 20px;
    &:before {
        content: "";
        margin-right: 10px;
        vertical-align: middle;
        @extend .oChatIcon;
    }
}

.oBtnCloseSmall {
    display: inline-block;
    width: 9px;
    height: 9px;
    background: url(data:image/svg+xml;base64,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) no-repeat;
    background-position: 50%;
    margin: 0 7px 0 0;
    text-indent: -9999px;
}

.oBtnCloseMini {
    display: inline-block;
    background-image: inline-image("/close-icon-mini.svg");
    margin-left: 5px;
    vertical-align: middle;
    height: 9px;
    width: 10px;
    &:hover {
        background-image: inline-image("/close-icon-mini-hover.svg");
    }
}

.oBtnActionExt {
    position: relative;
    font-weight: bold;
    color: $link-color;
    border: 3px solid #E6E4E4;
    &:before {
        content: "";
        position: absolute;
    }
    &:hover {
        text-decoration: none;
    }
}

.oBtnAction {
    @extend .oBtnActionExt;
    font-size: 13px;
    padding: 9px 10px 7px 33px;
    border-radius: 7px;
    &:before {
        top: 9px;
        left: 10px;
        width: 15px;
        height: 15px;
        @include background-size(15px 15px);
    }
}

.oBtnActionSmall {
    @extend .oBtnActionExt;
    font-size: 11px;
    padding: 7px 8px 5px 27px;
    border-width: 2px;
    border-radius: 5px;
    &:before {
        top: 6px;
        left: 8px;
        width: 13px;
        height: 13px;
        @include background-size(12px 12px);
    }
}

.oBtnDelete {
    @extend .oBtnAction;
    &:before {
        @extend .oDeleteIcon;
    }
}

.oBtnDeleteSmall {
    @extend .oBtnActionSmall;
    &:before {
        @extend .oDeleteIcon;
    }
}

.oTag:hover > .oBtnCloseMini, .oTag.isSelected > .oBtnCloseMini {
    @extend .oBtnCloseMini:hover;
}

.oBtnEdit {
    @extend .oBtnAction;
    &:before {
        @extend .oEditIcon;
    }
}

.oBtnEditSmall {
    @extend .oBtnActionSmall;
    &:before {
        @extend .oEditIcon;
    }
}

.oBtnGrp {
    vertical-align: middle;
    display: inline-block;
    > input + label {
        @include box-shadow(0 1px 1px #e2e2e2);
        float: left;
        padding: 6px 15px;
        background: #eee;
        border: 1px solid #d6d6d6;
        border-right: none;
        color: #767676;
        font-weight: bold;
        text-align: center;
        cursor: pointer;
        &:first-of-type {
            border-radius: 6px 0 0 6px;
        }
        &:last-of-type {
            border-radius: 0 6px 6px 0;
            border-right: 1px solid #d6d6d6;
        }
    }

    > input {
        position: absolute;
        visibility: hidden;
        &:checked + label,
        &:focus + label {
            @include box-shadow(0 0 0 transparent, inset 0px 2px 0px #0093ed);
            background: #00adf2;
            border-color: #2090bd;
            border-right: 1px solid #2090bd;
            color: white;
        }
        &:active + label {
            outline: none;
        }
    }
}