src/styles/elements/buttons.scss
.argo-button {
    cursor: pointer;
    position: relative;
    display: inline-block;
    vertical-align: middle;
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    text-align: center;
    border-radius: 24px;
    color: $argo-color-teal-6;
    user-select: none;
    transition: background-color .2s, border .2s, color .2s;
    text-transform: uppercase;

    &.disabled,
    &[disabled] {
        color: $argo-color-gray-6;
        cursor: not-allowed;

        &:hover {
            color: $argo-color-gray-6;
        }
        
        &:focus {
            color: $argo-color-gray-6;
        }
    }

    &:not(.disabled):not([disabled]) {
        &:hover {
            background-color: #d1d5d9;
        }

        &:focus {
            background-color: #d1d5d9;
        }
    }

    &--base {
        color: $argo-color-gray-1;
        background-color: $argo-color-gray-6;

        &:not(.disabled):not([disabled]) {
            &:hover {
                color: $argo-color-gray-1;
                background-color: $argo-color-gray-5;
            }

            &:focus {
                color: $argo-color-gray-1;
                background-color: $argo-color-gray-5;
                border: 1px solid $argo-color-teal-5 !important;
            }
        }

        &.disabled,
        &[disabled] {
            color: $argo-color-gray-6;
            background-color: $argo-color-gray-4;

            &:hover {
                color: $argo-color-gray-7;
            }
        }
    }

    &--link {
        color: $argo-color-teal-6;

        &:not(.disabled):not([disabled]) {
            &:hover {
                background-color: $argo-color-gray-3;
            }

            &:focus {
                background-color: $argo-color-gray-3;
            }
        }

        &.disabled,
        &[disabled] {
            color: $argo-color-gray-6;

            &:hover {
                background-color: transparent;
            }

            &:focus {
                background-color: transparent;
            }
        }
    }

    &--base-o {
        color: $argo-color-teal-6;
        box-shadow: inset 0 0 0 1px $argo-color-teal-5;

        &:not(.disabled):not([disabled]) {
            &:hover {
                color: $argo-color-gray-1;
                background-color:$argo-color-teal-6;
            }

            &:focus {
                color: $argo-color-gray-1;
                background-color:$argo-color-teal-6;
            }
        }

        &.disabled,
        &[disabled] {
            color: $argo-color-gray-6;
            box-shadow: inset 0 0 0 1px $argo-color-gray-4;

            &:hover {
                color: $argo-color-gray-7;
            }

            &:focus {
                color: $argo-color-gray-7;
            }
        }
    }

    &--full-width {
        width: 100%;
    }

    &--center {
        margin: 10px auto;
        display: block;
    }

    &--rectangle {
        border-radius: 50%;
        height: 40px;
        width: 40px;
        min-width: 40px;
        font-weight: lighter;
        color: $argo-color-teal-6;
        background-color: transparent;
        box-shadow: inset 0 0 0 1px rgba($argo-color-teal-6, .4);

        & > i {
            line-height: 40px;
        }
    }

    &--right {
        float: right;
    }

    &--has-icon {
        padding-top: 18px;
    }

    &--short {
        padding: 5px 10px;
        min-width: 10px;
    }

    &--lg {
        font-size: 20px;
    }

    &--xlg {
        font-size: 14px;
        line-height: 42px;
    }

    &--sm {
        min-width: 60px;
        padding: 0 14px;
        font-size: 12px;
        line-height: 28px;
        border-radius: 18px;
    }

    &--radius {
        width: 56px;
        height: 56px;
        min-width: 0;
        padding: 0;
        color: #fff;
        line-height: 56px;
        margin: 0 0 4px;
        font-size: 20px;
        box-shadow: 0 2px 3px rgba(0,0,0,.3);
        background-color: $argo-color-teal-5;
        border-radius: 50%;

        &:hover {
            background: lighten($argo-color-teal-5, 10) !important;
        }

        &:focus {
            background: lighten($argo-color-teal-5, 10) !important;
        }

        &:not(.disabled) {
            &:hover {
                color: #fff;
            }

            &:focus {
                color: #fff;
            }
        }

        .fa {
            vertical-align: middle;
        }
    }

    &--radius-2 {
        min-width: 40px!important;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        border: 1px solid rgba($argo-color-teal-6, .5);
        padding: 0;
        font-size: 20px;

        i {
            padding-bottom: 3px;
        }

        &::before,
        &::after {
            background: $argo-color-teal-6;
        }

    }

    &--special {
        color: #fff;
        background: $argo-color-teal-7;
        &:not(.disabled) {
            &:hover {
                color: #fff;
            }

            &:focus {
                color: #fff;
            }
        }
    }

    &[axButtonWave] {
        overflow: hidden;

        .wave {
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.4);
            transform: scale(0);
            position: absolute;
            opacity: 1;
            animation: rippleDrop .6s linear;
        }
    }
}

@keyframes rippleDrop {
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

.argo-button-close {
    display: block;
    width: 2em;
    height: 2em;
    border-radius: 50%;
    outline: 0;
    cursor: pointer;

    &::before,
    &::after {
        position: absolute;
        top: 50%;
        left: 0.475em;
        width: 1em;
        height: 1px;
        background: #999;
        content: '';
    }

    &::before {
        transform: rotate(45deg);
    }

    &::after {
        transform: rotate(-45deg);
    }
}
