This is my config for CSS Comb - sorting as here http://backendbutters.github.io/code-guide/#css-declaration-order

.csscomb.json

{
    "always-semicolon": true,
    "color-case": "lower",
    "block-indent": 4,
    "color-shorthand": true,
    "element-case": "lower",
    "eof-newline": true,
    "leading-zero": false,
    "quotes": "double",
    "sort-order-fallback": "abc",
    "space-before-colon": "",
    "space-after-colon": " ",
    "space-before-combinator": " ",
    "space-after-combinator": " ",
    "space-between-declarations": "\n",
    "space-before-opening-brace": " ",
    "space-after-opening-brace": "\n",
    "space-before-closing-brace": "\n",
    "space-before-selector-delimiter": "",
    "space-after-selector-delimiter": " ",
    "strip-spaces": true,
    "tab-size": true,
    "unitless-zero": true,
    "vendor-prefix-align": true,
    "sort-order": [
        "$variable",
        "$include",
        "$extend",
        "$import",
        "position",
        "top",
        "right",
        "bottom",
        "left",
        "-webkit-align-items",
        "align-items",
        "-webkit-align-content",
        "align-content",
        "-webkit-align-self",
        "align-self",
        "-webkit-flex",
        "-ms-flex",
        "flex",
        "-webkit-flex-align",
        "-ms-flex-align",
        "flex-align",
        "-webkit-flex-basis",
        "-ms-flex-basis",
        "flex-basis",
        "-webkit-flex-direction",
        "-ms-flex-direction",
        "flex-direction",
        "-webkit-flex-flow",
        "-ms-flex-flow",
        "flex-flow",
        "-webkit-flex-grow",
        "-ms-flex-grow",
        "flex-grow",
        "-webkit-flex-order",
        "-ms-flex-order",
        "flex-order",
        "-webkit-flex-pack",
        "-ms-flex-pack",
        "flex-pack",
        "-webkit-flex-shrink",
        "-ms-flex-shrink",
        "flex-shrink",
        "-webkit-flex-wrap",
        "-ms-flex-wrap",
        "flex-wrap",
        "-webkit-justify-content",
        "justify-content",
        "-ms-flex-order",
        "-webkit-order",
        "order",
        "z-index",
        "-webkit-box-sizing",
        "-moz-box-sizing",
        "box-sizing",
        "display",
        "float",
        "width",
        "height",
        "max-width",
        "max-height",
        "min-width",
        "min-height",
        "padding",
        "padding-top",
        "padding-right",
        "padding-bottom",
        "padding-left",
        "margin",
        "margin-top",
        "margin-right",
        "margin-bottom",
        "margin-left",
        "margin-collapse",
        "margin-top-collapse",
        "margin-right-collapse",
        "margin-bottom-collapse",
        "margin-left-collapse",
        "overflow",
        "overflow-x",
        "overflow-y",
        "clip",
        "clip-path",
        "clear",
        "color",
        "content",
        "counter-reset",
        "counter-increment",
        "-webkit-direction",
        "direction",
        "font",
        "font-family",
        "-webkit-font-feature-settings",
        "-moz-font-feature-settings",
        "-ms-font-feature-settings",
        "font-feature-settings",
        "font-size",
        "-webkit-font-kerning",
        "font-kerning",
        "-moz-osx-font-smoothing",
        "-webkit-font-smoothing",
        "font-smoothing",
        "font-stretch",
        "font-style",
        "font-variant",
        "font-weight",
        "hanging-punctuation",
        "hyphens",
        "quotes",
        "line-height",
        "letter-spacing",
        "text-align",
        "text-decoration",
        "-webkit-text-emphasis",
        "text-emphasis",
        "-webkit-text-emphasis-color",
        "text-emphasis-color",
        "-webkit-text-emphasis-position",
        "text-emphasis-position",
        "-webkit-text-emphasis-style",
        "text-emphasis-style",
        "text-indent",
        "-ms-text-justify",
        "text-justify",
        "-ms-text-overflow-style",
        "-ms-text-overflow",
        "text-overflow",
        "text-overflow-ellipsis",
        "text-overflow-mode",
        "text-rendering",
        "text-size-adjust",
        "text-shadow",
        "text-transform",
        "word-break",
        "word-spacing",
        "-ms-word-wrap",
        "word-wrap",
        "word-break",
        "-ms-word-break",
        "-moz-tab-size",
        "-o-tab-size",
        "tab-size",
        "vertical-align",
        "white-space",
        "list-style",
        "list-style-image",
        "list-style-position",
        "list-style-type",
        "-webkit-appearance",
        "-moz-appearance",
        "appearance",
        "background",
        "background-color",
        "background-attachment",
        "-webkit-background-clip",
        "background-clip",
        "background-image",
        "background-repeat",
        "background-repeat-x",
        "background-repeat-y",
        "background-position",
        "background-position-x",
        "background-position-y",
        "background-origin",
        "background-size",
        "-webkit-box-decoration-break",
        "box-decoration-break",
        "-webkit-box-shadow",
        "box-shadow",
        "border",
        "border-collapse",
        "border-top",
        "border-right",
        "border-bottom",
        "border-left",
        "border-color",
        "border-image",
        "border-top-color",
        "border-right-color",
        "border-bottom-color",
        "border-left-color",
        "border-spacing",
        "border-style",
        "border-top-style",
        "border-right-style",
        "border-bottom-style",
        "border-left-style",
        "border-width",
        "border-top-width",
        "border-right-width",
        "border-bottom-width",
        "border-left-width",
        "border-radius",
        "border-top-right-radius",
        "border-bottom-right-radius",
        "border-bottom-left-radius",
        "border-top-left-radius",
        "border-radius-topright",
        "border-radius-bottomright",
        "border-radius-bottomleft",
        "border-radius-topleft",
        "outline",
        "outline-width",
        "outline-style",
        "outline-color",
        "outline-offset",
        "-webkit-perspective",
        "perspective",
        "-webkit-perspective-origin",
        "perspective-origin",
        "table-layout",
        "-webkit-transform",
        "-ms-transform",
        "transform",
        "-webkit-transform-origin",
        "-ms-transform-origin",
        "transform-origin",
        "-webkit-transform-style",
        "-ms-transform-style",
        "transform-style",
        "-webkit-animation",
        "animation",
        "-webkit-animation-delay",
        "animation-delay",
        "-webkit-animation-duration",
        "animation-duration",
        "-webkit-animation-iteration-count",
        "animation-iteration-count",
        "-webkit-animation-name",
        "animation-name",
        "-webkit-animation-play-state",
        "animation-play-state",
        "-webkit-animation-timing-function",
        "animation-timing-function",
        "-webkit-animation-fill-mode",
        "animation-fill-mode",
        "-webkit-backface-visibility",
        "backface-visibility",
        "-webkit-transition",
        "transition",
        "-webkit-transition-delay",
        "transition-delay",
        "-webkit-transition-duration",
        "transition-duration",
        "-webkit-transition-property",
        "transition-property",
        "-webkit-transition-timing-function",
        "transition-timing-function",
        "will-change",
        "cursor",
        "opacity",
        "filter",
        "visibility",
        "-ms-zoom",
        "zoom",
        "marks",
        "page-break",
        "page-break-before",
        "page-break-inside",
        "page-break-after",
        "pointer-events",
        "resize",
        "unicode-bidi",
        "-webkit-user-select",
        "-moz-user-select",
        "-ms-user-select",
        "user-select",
        "scrollbar",
        "widows"
    ]
}