diff --git a/src/global-style.tsx b/src/global-style.tsx
index cf0170c..121f6ca 100644
--- a/src/global-style.tsx
+++ b/src/global-style.tsx
@@ -1,16 +1,20 @@
 import { css } from "@emotion/react";
-import "normalize.css";
+import { mq } from "./style-predefines";
 
-export const globalStyle = css`
-  @import-normalize;
-
-  :root {
-    font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
-    font-size: 62.5%;
-    font-synthesis: none;
-    text-rendering: optimizeLegibility;
-    -webkit-font-smoothing: antialiased;
-    -moz-osx-font-smoothing: grayscale;
-    -webkit-text-size-adjust: 100%;
-  }
-`;
+export const globalStyle = (theme) =>
+  css({
+    [":root"]: {
+      colorScheme: "light dark",
+      fontFamily: "Inter, Avenir, Helvetica, Arial, sans-serif",
+      fontSize: 0.625,
+      fontSynthesis: "none",
+      textRendering: "optimizeLegibility",
+      WebkitFontSmoothing: "antialiased",
+      MozOsxFontSmoothing: "grayscale",
+      WebkitTextSizeAdjust: "100%",
+      backgroundColor: theme.backgroundColor.light,
+      [mq.dark]: {
+        backgroundColor: theme.backgroundColor.dark,
+      },
+    },
+  });
diff --git a/src/style-predefines.tsx b/src/style-predefines.tsx
new file mode 100644
index 0000000..8cd43b9
--- /dev/null
+++ b/src/style-predefines.tsx
@@ -0,0 +1,104 @@
+import { css, Elevation, FontSizeUnit, MeasureUnit, Theme } from "@emotion/react";
+import chroma from "chroma-js";
+import type { Property } from "csstype";
+
+export function generatePalette(lightest: string, darkest: string): ColorPalette {
+  return chroma.scale([lightest, darkest]).mode("lch").colors(10, "hex");
+}
+
+export const mq = {
+  dark: `@media (prefers-color-scheme: dark)`,
+  [576]: `@media (min-width: 576px)`,
+  [768]: `@media (min-width: 768px)`,
+  [992]: `@media (min-width: 992px)`,
+  [1200]: `@media (min-width: 1200px)`,
+};
+
+function transformShadowDefine(
+  shadow: Elevation,
+  shadowColor?: chroma.Color = chroma.hsl(0, 0, 0)
+): string[] {
+  return [
+    `${shadow.offset.width}px`,
+    `${shadow.offset.height}px`,
+    `${shadow.blur}px`,
+    shadowColor.alpha(shadow.opacity).hex(),
+  ];
+}
+
+export function elevation(theme: Theme, level: MeasureUnit) {
+  return css({ boxShadow: transformShadowDefine(theme.elevations[level]) });
+}
+
+export function flex(
+  theme: Theme,
+  direction: Property.FlexDirection = "row",
+  justify: Property.JustifyContent = "flex-start",
+  align: Property.AlignItems = "start",
+  wrap: Property.FlexWrap = "nowrap",
+  gap: MeasureUnit = "none"
+) {
+  return css({
+    display: "flex",
+    flexDirection: direction,
+    justifyContent: justify,
+    alignItems: align,
+    flexWrap: wrap,
+    gap: `${theme.spacings[gap]}px`,
+  });
+}
+
+export function paddingHorizontal(theme: Theme, padding: MeasureUnit | number = "none") {
+  switch (typeof padding) {
+    case "number":
+      return css({ paddingLeft: padding, paddingRight: padding });
+    case "string":
+      return css({
+        paddingLeft: theme.spacings[padding],
+        paddingRight: theme.spacings[padding],
+      });
+  }
+}
+
+export function paddingVertical(theme: Theme, padding: MeasureUnit | number = "none") {
+  switch (typeof padding) {
+    case "number":
+      return css({ paddingTop: padding, paddingBottom: padding });
+    case "string":
+      return css({
+        paddingTop: theme.spacings[padding],
+        paddingBottom: theme.spacings[padding],
+      });
+  }
+}
+
+export function marginHorizontal(theme: Theme, margin: MeasureUnit | number = "none") {
+  switch (typeof margin) {
+    case "number":
+      return css({ marginLeft: margin, marginRight: margin });
+    case "string":
+      return css({
+        marginLeft: theme.spacings[margin],
+        marginRight: theme.spacings[margin],
+      });
+  }
+}
+
+export function marginVertical(theme: Theme, margin: MeasureUnit | number = "none") {
+  switch (typeof margin) {
+    case "number":
+      return css({ marginTop: margin, marginBottom: margin });
+    case "string":
+      return css({
+        marginTop: theme.spacings[margin],
+        marginBottom: theme.spacings[margin],
+      });
+  }
+}
+
+export function Typography(theme: Theme, fontSize: FontSizeUnit, lineHeightRatio: number = 1.3) {
+  return css({
+    fontSize: theme.fontSizes[fontSize],
+    lineHeight: theme.fontSizes[fontSize] * lineHeightRatio,
+  });
+}
diff --git a/src/theme.tsx b/src/theme.tsx
new file mode 100644
index 0000000..6e5478a
--- /dev/null
+++ b/src/theme.tsx
@@ -0,0 +1,142 @@
+import type { Theme } from "@emotion/react";
+import { generatePalette } from "./style-predefines";
+
+const colors: Theme["colors"] = {
+  dark: generatePalette("#c9c9c9", "#141414"),
+  gray: generatePalette("#f8f9fa", "#212529"),
+  red: generatePalette("#fff5f5", "#c92a2a"),
+  pink: generatePalette("#fff0f6", "#a61e4d"),
+  grape: generatePalette("#f8f0fc", "#862e9c"),
+  violet: generatePalette("#f3f0ff", "#5f3dc4"),
+  indigo: generatePalette("#edf2ff", "#364fc7"),
+  bllue: generatePalette("#e7f5ff", "#1864ab"),
+  cyan: generatePalette("#e3fafc", "#0b7285"),
+  teal: generatePalette("#e6fcf5", "#087f5b"),
+  green: generatePalette("#ebfbee", "#2b8a3e"),
+  lime: generatePalette("#f4fce3", "#5c940d"),
+  yellow: generatePalette("#fff9db", "#e67700"),
+  orange: generatePalette("#fff4e6", "#d9480f"),
+};
+
+export const theme: Partial<Theme> = {
+  colors,
+  white: "#ffffff",
+  black: "#000000",
+  foregroundColor: {
+    light: chroma.hsl(0, 0, 0.06).hex(),
+    dark: chroma.hsl(0, 0, 0.88).hex(),
+  },
+  backgroundColor: {
+    light: chroma.hsl(0, 0, 0.96).hex(),
+    dark: chroma.hsl(0, 0, 0.18).hex(),
+  },
+  successColor: {
+    light: colors.green[5],
+    dark: colors.green[7],
+  },
+  warnColor: {
+    light: colors.yellow[5],
+    dark: colors.yellow[7],
+  },
+  dangerColor: {
+    light: colors.red[5],
+    dark: colors.red[7],
+  },
+  infoColor: {
+    light: colors.blue[5],
+    dark: colors.blue[7],
+  },
+  spacings: {
+    none: 0,
+    xxs: 2,
+    xs: 4,
+    sm: 8,
+    md: 16,
+    lg: 24,
+    xl: 32,
+    xxl: 40,
+  },
+  radius: {
+    none: 0,
+    xxs: 1,
+    xs: 2,
+    sm: 4,
+    md: 8,
+    lg: 16,
+    xl: 24,
+    xxl: 32,
+  },
+  fontSizes: {
+    fp: 56,
+    fps: 48,
+    f1: 34.7,
+    f1s: 32,
+    f2: 29.3,
+    f2s: 24,
+    f3: 21.3,
+    f3s: 20,
+    f4: 18.7,
+    f4s: 16,
+    f5: 14,
+    f5s: 12,
+    f6: 10,
+    f6s: 8.7,
+    f7: 7.3,
+    f7s: 6.7,
+  },
+  paragraphFontSize: 14,
+  titleFontSize: {
+    h1: 56,
+    h2: 34.7,
+    h3: 29.3,
+    h4: 21.3,
+    h5: 18.7,
+    h6: 14,
+  },
+  elevationColor: {
+    light: chroma.hsl(0, 0, 0).alpha(0.2).hex(),
+    dark: chroma.hsl(0, 0, 0).alpha(0.2).hex(),
+  },
+  elevations: {
+    none: {
+      offset: { width: 0, height: 0 },
+      blur: 0,
+      opacity: 0,
+    },
+    xxs: {
+      offset: { width: 1, height: 1 },
+      blur: 2,
+      opacity: 0.2,
+    },
+    xs: {
+      offset: { width: 2, height: 2 },
+      blur: 4,
+      opacity: 0.2,
+    },
+    sm: {
+      offset: { width: 3, height: 3 },
+      blur: 6,
+      opacity: 0.2,
+    },
+    md: {
+      offset: { width: 4, height: 4 },
+      blur: 8,
+      opacity: 0.2,
+    },
+    lg: {
+      offset: { width: 5, height: 5 },
+      blur: 10,
+      opacity: 0.2,
+    },
+    xl: {
+      offset: { width: 6, height: 6 },
+      blur: 12,
+      opacity: 0.2,
+    },
+    xxl: {
+      offset: { width: 7, height: 7 },
+      blur: 14,
+      opacity: 0.2,
+    },
+  },
+};
diff --git a/src/typings/theme.d.ts b/src/typings/theme.d.ts
new file mode 100644
index 0000000..81fcbc7
--- /dev/null
+++ b/src/typings/theme.d.ts
@@ -0,0 +1,69 @@
+import "@emotion/react";
+
+declare module "@emotion/react" {
+  export type ColorName =
+    | "dark"
+    | "gray"
+    | "red"
+    | "pink"
+    | "grape"
+    | "violet"
+    | "indigo"
+    | "blue"
+    | "cyan"
+    | "teal"
+    | "green"
+    | "lime"
+    | "yellow"
+    | "orange";
+  export type ColorScheme = "light" | "dark";
+  export type MeasureUnit = "none" | "xxs" | "xs" | "sm" | "md" | "lg" | "xl" | "xxl";
+  export type FontSizeUnit =
+    | "fp"
+    | "fps"
+    | "f1"
+    | "f1s"
+    | "f2"
+    | "f2s"
+    | "f3"
+    | "f3s"
+    | "f4"
+    | "f4s"
+    | "f5"
+    | "f5s"
+    | "f6"
+    | "f6s"
+    | "f7"
+    | "f7s";
+  export type TitleLevel = "h1" | "h2" | "h3" | "h4" | "h5" | "h6";
+  export type ColorPalette = Array<string>;
+  export type Elevation = {
+    offset: {
+      width: number;
+      height: number;
+    };
+    blur: number;
+    opacity: number;
+  };
+
+  export interface Theme {
+    colors: Record<ColorName, ColorPalette>;
+    black: string;
+    white: string;
+    primaryColor: Record<ColorScheme, ColorPalette>;
+    secondaryColor: Record<ColorScheme, ColorPalette>;
+    backgroundColor: Record<ColorScheme, string>;
+    foregroundColor: Record<ColorScheme, string>;
+    successColor: Record<ColorScheme, string>;
+    warnColor: Record<ColorScheme, string>;
+    dangerColor: Record<ColorScheme, string>;
+    infoColor: Record<ColorScheme, string>;
+    spacings: Record<MeasureUnit, number>;
+    radius: Record<MeasureUnit, number>;
+    fontSizes: Record<FontSizeUnit, number>;
+    paragraphFontSize: number;
+    titleFontSize: Record<TitleLevel, number>;
+    elevations: Record<MeasureUnit, Elevation>;
+    elevationColor: Record<ColorScheme, string>;
+  }
+}