diff --git a/.eslintrc b/.eslintrc
index 7d72ee8c..c99fa561 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -85,6 +85,12 @@
         "allowExpressions": true
       }
     ],
+    "react/no-unknown-property": [
+      "error",
+      {
+        "ignore": ["css"]
+      }
+    ],
     "react/react-in-jsx-scope": "off",
     "react/require-default-props": [
       "error",
diff --git a/client/src/components/pages/MainPage.tsx b/client/src/components/pages/MainPage.tsx
index ce3968cb..ed5dfd2f 100644
--- a/client/src/components/pages/MainPage.tsx
+++ b/client/src/components/pages/MainPage.tsx
@@ -1,7 +1,8 @@
 import React, { useEffect } from "react";
-import { Box } from "@/components/atoms";
 import { AgendaSection, ChatSection } from "@/components/organisms";
 import { useAgenda } from "@/services/agenda";
+import { align, gap, justify, padding, row } from "@/styles";
+import { w, h } from "@/styles/size";
 
 export const MainPage: React.FC = () => {
   const { retrieveAgendas } = useAgenda(state => ({
@@ -13,18 +14,20 @@ export const MainPage: React.FC = () => {
   }, []);
 
   return (
-    <Box
-      dir="row"
-      justify="center"
-      w="fill"
-      h="fill"
-      padTop={10}
-      padBottom={30}
-      gap={20}
-      align="stretch"
+    <main
+      css={[
+        row,
+        justify.center,
+        align.stretch,
+        w.fill,
+        h.fill,
+        padding.top(10),
+        padding.bottom(30),
+        gap(20),
+      ]}
     >
       <AgendaSection />
       <ChatSection />
-    </Box>
+    </main>
   );
 };
diff --git a/client/src/styles/background.ts b/client/src/styles/background.ts
new file mode 100644
index 00000000..27c1ad30
--- /dev/null
+++ b/client/src/styles/background.ts
@@ -0,0 +1,13 @@
+import { mapColors } from "@/styles/color";
+import { css } from "@emotion/react";
+
+/**
+ * Applies background-color
+ * @example
+ * bg.gray100  // Apply gray100 background-color
+ */
+export const bg = mapColors(
+  color => css`
+    background-color: ${color};
+  `,
+);
diff --git a/client/src/styles/border.ts b/client/src/styles/border.ts
new file mode 100644
index 00000000..8056d591
--- /dev/null
+++ b/client/src/styles/border.ts
@@ -0,0 +1,14 @@
+import { css } from "@emotion/react";
+import { mapColors } from "@/styles/color";
+
+/**
+ * Applies border
+ * @example
+ * border.gray300              // Apply gray300 border
+ * [border.gray300, round.md]  // Usage with `round` mixin
+ */
+export const border = mapColors(
+  color => css`
+    border: 1px solid ${color};
+  `,
+);
diff --git a/client/src/styles/color.ts b/client/src/styles/color.ts
new file mode 100644
index 00000000..644899e8
--- /dev/null
+++ b/client/src/styles/color.ts
@@ -0,0 +1,32 @@
+export const colors = {
+  white: "#FFFFFF",
+  black: "#444444",
+  white100: "#FAFBFC",
+  gray100: "#FAFAFA",
+  gray200: "#EEEEEE",
+  gray300: "#D9D9D9",
+  gray400: "#B6B6B6",
+  gray500: "#8C8C8C",
+  gray600: "#555555",
+  grayTrans: "rgba(85, 85, 85, 0.1)",
+  blue100: "#FAFCFF",
+  blue200: "#E7F0FF",
+  blue300: "#BFDCFF",
+  blue400: "#6EABF4",
+  blue500: "#2F80DE",
+  blue600: "#065DAC",
+  blue700: "#004B81",
+  purpleLight: "#F6EEFE",
+  purple: "#9836EF",
+  orangeLight: "#FDF7E6",
+  orange: "#FF9211",
+  greenLight: "#E9F9EF",
+  green: "#008B1C",
+} as const;
+
+type ColorKeys = keyof typeof colors;
+export type Color = (typeof colors)[ColorKeys];
+export const mapColors = <T>(cb: (color: Color) => T) =>
+  Object.fromEntries(
+    Object.entries(colors).map(([key, value]) => [key, cb(value)] as const),
+  ) as Record<ColorKeys, T>;
diff --git a/client/src/styles/index.ts b/client/src/styles/index.ts
new file mode 100644
index 00000000..d17828a9
--- /dev/null
+++ b/client/src/styles/index.ts
@@ -0,0 +1,8 @@
+export * from "./background";
+export * from "./border";
+export * from "./color";
+export * from "./layout";
+export * from "./round";
+export * from "./spacing";
+export * from "./text";
+export * from "./size";
diff --git a/client/src/styles/layout.ts b/client/src/styles/layout.ts
new file mode 100644
index 00000000..394ca47f
--- /dev/null
+++ b/client/src/styles/layout.ts
@@ -0,0 +1,59 @@
+import { css } from "@emotion/react";
+
+export const column = css`
+  display: flex;
+  flex-direction: column;
+`;
+
+export const row = css`
+  display: flex;
+  flex-direction: row;
+`;
+
+export const center = css`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+`;
+
+export const justify = {
+  start: css`
+    justify-content: flex-start;
+  `,
+  center: css`
+    justify-content: center;
+  `,
+  end: css`
+    justify-content: flex-end;
+  `,
+  between: css`
+    justify-content: space-between;
+  `,
+  around: css`
+    justify-content: space-around;
+  `,
+} as const;
+
+export const align = {
+  start: css`
+    align-items: flex-start;
+  `,
+  center: css`
+    align-items: center;
+  `,
+  end: css`
+    align-items: flex-end;
+  `,
+  stretch: css`
+    align-items: stretch;
+  `,
+} as const;
+
+/**
+ * Applies flexbox with column direction
+ * @example
+ * gap(10) // Apply 10px gap
+ */
+export const gap = (value: number) => css`
+  gap: ${value}px;
+`;
diff --git a/client/src/styles/round.ts b/client/src/styles/round.ts
new file mode 100644
index 00000000..3faf1944
--- /dev/null
+++ b/client/src/styles/round.ts
@@ -0,0 +1,16 @@
+import { css } from "@emotion/react";
+
+/**
+ * Applies border radius
+ * @example
+ * round.md  // Apply 5px radius
+ * round.lg  // Apply 10px radius
+ */
+export const round = {
+  md: css`
+    border-radius: 5px;
+  `,
+  lg: css`
+    border-radius: 10px;
+  `,
+} as const;
diff --git a/client/src/styles/size.ts b/client/src/styles/size.ts
new file mode 100644
index 00000000..ea522c22
--- /dev/null
+++ b/client/src/styles/size.ts
@@ -0,0 +1,29 @@
+import { css } from "@emotion/react";
+
+const applyAttribute = (attribute: "height" | "width") =>
+  Object.assign(
+    (value: number) => css`
+      ${attribute}: ${value}px;
+    `,
+    {
+      fill: css`
+        ${attribute}: 100%;
+      `,
+    },
+  );
+
+/**
+ * Applies height
+ * @example
+ * h(10)   // 10px height
+ * h.fill  // 100% height
+ */
+export const h = applyAttribute("height");
+
+/**
+ * Applies width
+ * @example
+ * w(10)   // 10px width
+ * w.fill  // 100% width
+ */
+export const w = applyAttribute("width");
diff --git a/client/src/styles/spacing.ts b/client/src/styles/spacing.ts
new file mode 100644
index 00000000..83aed694
--- /dev/null
+++ b/client/src/styles/spacing.ts
@@ -0,0 +1,31 @@
+import { css } from "@emotion/react";
+
+const style = (attribute: string) => (value: number) => css`
+  ${attribute}: ${value}px;
+`;
+
+const applyPrefix = (prefix: "padding" | "margin") =>
+  Object.assign(style(prefix), {
+    top: style(`${prefix}-top`),
+    bottom: style(`${prefix}-bottom`),
+    left: style(`${prefix}-left`),
+    right: style(`${prefix}-right`),
+    vertical: style(`${prefix}-block`),
+    horizontal: style(`${prefix}-inline`),
+  });
+
+/**
+ * @example
+ * padding(10)            // 10px padding for all sides
+ * padding.top(5)         // 5px padding for top
+ * padding.horizontal(8)  // 8px padding for left and right
+ */
+export const padding = applyPrefix("padding");
+
+/**
+ * @example
+ * margin(10)            // 10px margin for all sides
+ * margin.top(5)         // 5px margin for top
+ * margin.horizontal(8)  // 8px margin for left and right
+ */
+export const margin = applyPrefix("margin");
diff --git a/client/src/styles/text.ts b/client/src/styles/text.ts
new file mode 100644
index 00000000..63e7854e
--- /dev/null
+++ b/client/src/styles/text.ts
@@ -0,0 +1,32 @@
+import { css } from "@emotion/react";
+import { mapColors } from "@/styles/color";
+
+const style = (size: number, weight: number) => css`
+  font-size: ${size}px;
+  font-weight: ${weight};
+`;
+
+/**
+ * Applies typography styles and text color
+ * @example
+ * text.title1   // Apply title1 typography
+ * text.gray300  // Apply gray300 text color
+ */
+export const text = {
+  ...mapColors(
+    color => css`
+      color: ${color};
+    `,
+  ),
+  title1: style(15, 500),
+  title2: style(14, 500),
+  title3: style(13, 500),
+  subtitle: style(11, 500),
+  body: style(12, 500),
+  option1: style(10, 500),
+  option2: style(9, 500),
+  boldtitle1: style(14, 700),
+  boldtitle2: style(13, 700),
+  boldtitle3: style(12, 700),
+  boldtitle4: style(11, 700),
+} as const;
diff --git a/client/tsconfig.json b/client/tsconfig.json
index c5d978e6..94e3fa96 100644
--- a/client/tsconfig.json
+++ b/client/tsconfig.json
@@ -21,6 +21,7 @@
     "isolatedModules": true,
     "noEmit": true,
     "jsx": "react-jsx",
+    "jsxImportSource": "@emotion/react",
     "types": ["vite-plugin-svgr/client"]
   },
   "include": ["src", "vite.config.ts"],
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 652749fe..c02c172d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -2670,7 +2670,7 @@ packages:
   /eslint-import-resolver-node@0.3.9:
     resolution: {integrity: sha512-WFj2isz22JahUv+B788TlO3N6zL3nNJGU8CcZbPZvVEkBPaJdCV4vy5wyghty5ROFbCRnm132v8BScu5/1BQ8g==}
     dependencies:
-      debug: 3.2.7
+      debug: 3.2.7(supports-color@5.5.0)
       is-core-module: 2.13.0
       resolve: 1.22.4
     transitivePeerDependencies:
@@ -2722,7 +2722,7 @@ packages:
         optional: true
     dependencies:
       '@typescript-eslint/parser': 6.2.1(eslint@8.48.0)(typescript@5.1.6)
-      debug: 3.2.7
+      debug: 3.2.7(supports-color@5.5.0)
       eslint: 8.48.0
       eslint-import-resolver-node: 0.3.9
       eslint-import-resolver-typescript: 3.6.0(@typescript-eslint/parser@6.2.1)(eslint-plugin-import@2.28.1)(eslint@8.48.0)
@@ -2745,7 +2745,7 @@ packages:
       array.prototype.findlastindex: 1.2.3
       array.prototype.flat: 1.3.1
       array.prototype.flatmap: 1.3.1
-      debug: 3.2.7
+      debug: 3.2.7(supports-color@5.5.0)
       doctrine: 2.1.0
       eslint: 8.48.0
       eslint-import-resolver-node: 0.3.9