diff --git a/src/common/schema/flexMessage.ts b/src/common/schema/flexMessage.ts
index fb34185..b89e9f6 100644
--- a/src/common/schema/flexMessage.ts
+++ b/src/common/schema/flexMessage.ts
@@ -1,22 +1,372 @@
 import { z } from "zod";
 
-export const flexMessageSchema = z.object({
-  type: z.literal("flex").default("flex"),
-  altText: z
+const sizeSchema = z
+  .enum(["xxs", "xs", "sm", "md", "lg", "xl", "xxl", "3xl", "4xl", "5xl"])
+  .default("md");
+const imageSizeSchema = z
+  .enum([
+    "xxs",
+    "xs",
+    "sm",
+    "md",
+    "lg",
+    "xl",
+    "xxl",
+    "3xl",
+    "4xl",
+    "5xl",
+    "full",
+  ])
+  .default("md");
+const spacerSizeSchema = z.enum(["xs", "sm", "md", "lg", "xl", "xxl"]);
+const marginSchema = z.enum(["none", "xs", "sm", "md", "lg", "xl", "xxl"]);
+const spacingSchema = z.enum(["none", "xs", "sm", "md", "lg", "xl", "xxl"]);
+const positionSchema = z.enum(["relative", "absolute"]);
+const alignSchema = z.enum(["start", "end", "center"]);
+const gravitySchema = z.enum(["top", "bottom", "center"]);
+const offsetSchema = z.string().regex(/^\d+px$/, "Format: '10px'");
+const colorSchema = z
+  .string()
+  .regex(/^#[0-9A-Fa-f]{6}$/, "Hex format: '#FF0000'");
+const flexWeightSchema = z.number();
+const scalingSchema = z.boolean();
+
+const positionFields = {
+  position: positionSchema.optional(),
+  offsetTop: offsetSchema.optional(),
+  offsetBottom: offsetSchema.optional(),
+  offsetStart: offsetSchema.optional(),
+  offsetEnd: offsetSchema.optional(),
+};
+
+const layoutFields = {
+  flex: flexWeightSchema.optional(),
+  margin: marginSchema.optional(),
+  ...positionFields,
+};
+
+const alignmentFields = {
+  align: alignSchema.optional(),
+  gravity: gravitySchema.optional(),
+};
+
+const textStyleFields = {
+  text: z.string().min(1).max(2000),
+  color: colorSchema.optional(),
+  size: sizeSchema.optional(),
+  weight: z.enum(["regular", "bold"]).optional(),
+  style: z.enum(["normal", "italic"]).optional(),
+  decoration: z.enum(["none", "underline", "line-through"]).optional(),
+};
+
+const paddingFields = {
+  paddingAll: z
+    .string()
+    .regex(/^\d+px$/)
+    .optional(),
+  paddingTop: z
+    .string()
+    .regex(/^\d+px$/)
+    .optional(),
+  paddingBottom: z
     .string()
-    .describe("Alternative text shown when flex message cannot be displayed."),
-  contents: z
-    .object({
-      type: z
-        .enum(["bubble", "carousel"])
+    .regex(/^\d+px$/)
+    .optional(),
+  paddingStart: z
+    .string()
+    .regex(/^\d+px$/)
+    .optional(),
+  paddingEnd: z
+    .string()
+    .regex(/^\d+px$/)
+    .optional(),
+};
+
+const flexActionSchema = z.discriminatedUnion("type", [
+  z.object({
+    type: z.literal("postback"),
+    data: z.string().min(1).max(300),
+    label: z.string().min(1).max(20),
+    displayText: z.string().min(1).max(300).optional(),
+    inputOption: z
+      .enum(["closeRichMenu", "openRichMenu", "openKeyboard", "openVoice"])
+      .optional(),
+    fillInText: z.string().min(1).max(160).optional(),
+  }),
+  z.object({
+    type: z.literal("message"),
+    label: z.string().min(1).max(20),
+    text: z.string().min(1).max(300),
+  }),
+  z.object({
+    type: z.literal("uri"),
+    label: z.string().min(1).max(20),
+    uri: z
+      .string()
+      .describe(
+        "LINE Custom URI or URI" +
+          "LINE Custom URI document: https://developers.line.biz/ja/docs/messaging-api/using-line-url-scheme/",
+      ),
+    altUri: z
+      .object({
+        desktop: z.string().url(),
+      })
+      .optional(),
+  }),
+  z.object({
+    type: z.literal("datetimepicker"),
+    label: z.string().min(1).max(20),
+    data: z.string().min(1).max(300),
+    mode: z.enum(["date", "time", "datetime"]),
+    initial: z
+      .string()
+      .optional()
+      .describe("Format: 2100-12-31, 23:59, 2100-12-31T23:59"),
+    max: z
+      .string()
+      .optional()
+      .describe("Format: 2100-12-31, 23:59, 2100-12-31T23:59"),
+    min: z
+      .string()
+      .optional()
+      .describe("Format: 2100-12-31, 23:59, 2100-12-31T23:59"),
+  }),
+  z.object({
+    type: z.literal("camera"),
+    label: z.string().min(1).max(20),
+  }),
+  z.object({
+    type: z.literal("cameraRoll"),
+    label: z.string().min(1).max(20),
+  }),
+  z.object({
+    type: z.literal("location"),
+    label: z.string().min(1).max(20),
+  }),
+  z.object({
+    type: z.literal("richmenuswitch"),
+    label: z.string().min(1).max(20),
+    richMenuAliasId: z.string().min(1).max(32),
+    data: z.string().min(1).max(300),
+  }),
+  z.object({
+    type: z.literal("clipboard"),
+    label: z.string().min(1).max(20),
+    clipboardText: z.string().min(1).max(1000),
+  }),
+]);
+
+const flexSpanSchema = z.object({
+  type: z.literal("span"),
+  ...textStyleFields,
+});
+
+const flexComponentSchema: z.ZodType<any> = z.lazy(() =>
+  z.discriminatedUnion("type", [
+    z.object({
+      type: z.literal("separator"),
+      margin: marginSchema.optional(),
+      color: colorSchema.optional(),
+    }),
+    z.object({
+      type: z.literal("text"),
+      contents: z.array(flexSpanSchema).optional(),
+      adjustMode: z.enum(["shrink-to-fit"]).optional(),
+      wrap: z.boolean().optional().default(true),
+      lineSpacing: z.enum(["xs", "sm", "md", "lg", "xl", "xxl"]).optional(),
+      maxLines: z.number().optional(),
+      action: flexActionSchema.optional(),
+      scaling: scalingSchema.optional(),
+      ...textStyleFields,
+      ...layoutFields,
+      ...alignmentFields,
+    }),
+
+    z.object({
+      type: z.literal("icon"),
+      url: z
+        .string()
+        .url()
+        .min(1)
+        .max(2000)
+        .refine(url => url.startsWith("https://"), "Must use HTTPS protocol"),
+      size: sizeSchema.optional(),
+      aspectRatio: z
+        .string()
+        .regex(/^\d+:\d+$/)
         .describe(
-          "Type of the container. 'bubble' for single container, 'carousel' for multiple swipeable bubbles.",
+          "Aspect ratio in '{width}:{height}' format (e.g., '1:1', '16:9'). Width and height must be 1-100000, height cannot exceed width × 3",
+        )
+        .optional(),
+      scaling: scalingSchema.optional(),
+      ...layoutFields,
+    }),
+    z.object({
+      type: z.literal("image"),
+      url: z
+        .string()
+        .url()
+        .min(1)
+        .max(2000)
+        .default(
+          "https://developers-resource.landpress.line.me/fx/img/01_1_cafe.png",
         ),
-    })
-    .passthrough()
-    .describe(
-      "Flexible container structure following LINE Flex Message format. For 'bubble' type, can include header, " +
-        "hero, body, footer, and styles sections. For 'carousel' type, includes an array of bubble containers in " +
-        "the 'contents' property.",
-    ),
+      size: imageSizeSchema.optional(),
+      aspectRatio: z
+        .string()
+        .regex(/^\d+:\d+$/)
+        .describe(
+          "Aspect ratio in '{width}:{height}' format (e.g., '1:1', '16:9'). Width and height must be 1-100000, height cannot exceed width × 3",
+        )
+        .optional(),
+      aspectMode: z.enum(["cover", "fit"]).optional(),
+      backgroundColor: colorSchema.optional(),
+      animated: z.boolean().optional(),
+      action: flexActionSchema.optional(),
+      scaling: scalingSchema.optional(),
+      ...layoutFields,
+      ...alignmentFields,
+    }),
+    z.object({
+      type: z.literal("video"),
+      url: z
+        .string()
+        .url()
+        .min(1)
+        .max(2000)
+        .refine(url => url.startsWith("https://"), "Must use HTTPS protocol"),
+      previewUrl: z
+        .string()
+        .url()
+        .min(1)
+        .max(2000)
+        .default(
+          "https://developers-resource.landpress.line.me/fx/img/01_1_cafe.png",
+        ),
+      altContent: flexComponentSchema,
+      size: imageSizeSchema.optional(),
+      aspectRatio: z
+        .string()
+        .regex(/^\d+:\d+$/)
+        .describe(
+          "Aspect ratio in '{width}:{height}' format (e.g., '1:1', '16:9'). Width and height must be 1-100000, height cannot exceed width × 3",
+        )
+        .optional(),
+      action: flexActionSchema.optional(),
+      scaling: scalingSchema.optional(),
+      ...layoutFields,
+      ...alignmentFields,
+    }),
+
+    z.object({
+      type: z.literal("button"),
+      action: flexActionSchema,
+      height: z.enum(["sm", "md"]).optional(),
+      style: z.enum(["link", "primary", "secondary"]).optional(),
+      color: colorSchema.optional(),
+      gravity: gravitySchema.optional(),
+      adjustMode: z.enum(["shrink-to-fit"]).optional(),
+      scaling: scalingSchema.optional(),
+      ...layoutFields,
+    }),
+
+    z.object({
+      type: z.literal("box"),
+      layout: z.enum(["horizontal", "vertical", "baseline"]),
+      contents: z.array(flexComponentSchema),
+      backgroundColor: colorSchema.optional(),
+      borderColor: colorSchema.optional(),
+      borderWidth: z
+        .string()
+        .regex(/^\d+px$/)
+        .optional(),
+      cornerRadius: z
+        .string()
+        .regex(/^\d+px$/)
+        .optional(),
+      spacing: spacingSchema.optional(),
+      width: z
+        .string()
+        .regex(/^\d+px$/)
+        .optional(),
+      height: z
+        .string()
+        .regex(/^\d+px$/)
+        .optional(),
+      justifyContent: z
+        .enum([
+          "flex-start",
+          "center",
+          "flex-end",
+          "space-between",
+          "space-around",
+          "space-evenly",
+        ])
+        .optional(),
+      alignItems: z.enum(["flex-start", "center", "flex-end"]).optional(),
+      background: z
+        .object({
+          type: z.literal("linearGradient"),
+          angle: z.string().regex(/^\d+deg$/, "Format: '90deg'"),
+          startColor: colorSchema,
+          endColor: colorSchema,
+        })
+        .optional(),
+      action: flexActionSchema.optional(),
+      ...layoutFields,
+      ...paddingFields,
+    }),
+  ]),
+);
+
+const sectionStyleSchema = z.object({
+  backgroundColor: colorSchema.optional(),
+  separator: z.boolean().optional(),
+  separatorColor: colorSchema.optional(),
+});
+
+const flexBubbleStylesSchema = z.object({
+  header: sectionStyleSchema.optional(),
+  hero: sectionStyleSchema.optional(),
+  body: sectionStyleSchema.optional(),
+  footer: sectionStyleSchema.optional(),
+});
+
+export const flexBubbleSchema = z.object({
+  type: z.literal("bubble"),
+  size: z
+    .enum(["nano", "micro", "deca", "hecto", "kilo", "mega", "giga"])
+    .optional(),
+  direction: z.enum(["ltr", "rtl"]).optional(),
+  header: flexComponentSchema
+    .optional()
+    .describe("Header must be a Box")
+    .refine(component => component.type === "box", "Header must be a Box"),
+  hero: flexComponentSchema.optional(),
+  body: flexComponentSchema
+    .optional()
+    .describe("Body must be a Box")
+    .refine(component => component.type === "box", "Body must be a Box"),
+  footer: flexComponentSchema
+    .optional()
+    .describe("Footer must be a Box")
+    .refine(component => component.type === "box", "Footer must be a Box"),
+  styles: flexBubbleStylesSchema.optional(),
+  action: flexActionSchema.optional(),
+});
+
+const flexCarouselSchema = z.object({
+  type: z.literal("carousel"),
+  contents: z.array(flexBubbleSchema),
+});
+
+const flexContainerSchema = z.discriminatedUnion("type", [
+  flexBubbleSchema,
+  flexCarouselSchema,
+]);
+
+export const flexMessageSchema = z.object({
+  type: z.literal("flex").default("flex"),
+  altText: z.string().min(1).max(400),
+  contents: flexContainerSchema,
 });