diff --git a/html/global.css b/html/global.css
new file mode 100644
index 00000000..f02acc42
--- /dev/null
+++ b/html/global.css
@@ -0,0 +1,29 @@
+@font-face {
+  font-family: "ROKAF Sans";
+  src: url("font/ROKAF\ Sans\ Medium.otf") format(".otf");
+}
+
+:root {
+  --blue: #3692ff;
+  --lightblue: #cfe5ff;
+  --gray50: #f9fafb;
+  --gray100: #f3f4f6;
+  --gray200: #e5e7eb;
+  --gray400: #9ca3af;
+  --gray500: #6b7280;
+  --gray600: #4b5563;
+  --gray700: #374151;
+  --gray800: #1f2937;
+  --gray900: #111827;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+a:link,
+a:visited,
+a:hover,
+a:active {
+  text-decoration: none;
+}
diff --git a/html/img/btn_visibility_on_24px.svg b/html/img/pwVisibilityOff.svg
similarity index 100%
rename from html/img/btn_visibility_on_24px.svg
rename to html/img/pwVisibilityOff.svg
diff --git a/html/img/pwVisibilityOn.svg b/html/img/pwVisibilityOn.svg
new file mode 100644
index 00000000..35a75305
--- /dev/null
+++ b/html/img/pwVisibilityOn.svg
@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M12.0021 15.5769C13.1352 15.5769 14.0976 15.1803 14.8892 14.3871C15.6809 13.5939 16.0767 12.6308 16.0767 11.4977C16.0767 10.3646 15.6802 9.40224 14.887 8.61058C14.0938 7.81891 13.1307 7.42308 11.9976 7.42308C10.8645 7.42308 9.9021 7.81966 9.11044 8.61282C8.31877 9.40601 7.92294 10.3692 7.92294 11.5023C7.92294 12.6353 8.31952 13.5977 9.11269 14.3894C9.90587 15.181 10.869 15.5769 12.0021 15.5769ZM11.9998 14.2C11.2498 14.2 10.6123 13.9375 10.0873 13.4125C9.56234 12.8875 9.29984 12.25 9.29984 11.5C9.29984 10.75 9.56234 10.1125 10.0873 9.58748C10.6123 9.06248 11.2498 8.79998 11.9998 8.79998C12.7498 8.79998 13.3873 9.06248 13.9123 9.58748C14.4373 10.1125 14.6998 10.75 14.6998 11.5C14.6998 12.25 14.4373 12.8875 13.9123 13.4125C13.3873 13.9375 12.7498 14.2 11.9998 14.2ZM11.9998 18.5C9.89472 18.5 7.96941 17.9384 6.22391 16.8153C4.47839 15.6923 3.08513 14.2147 2.04411 12.3827C1.96078 12.2391 1.89988 12.0944 1.86141 11.9485C1.82294 11.8027 1.80371 11.653 1.80371 11.4995C1.80371 11.346 1.82294 11.1965 1.86141 11.051C1.89988 10.9054 1.96078 10.7609 2.04411 10.6173C3.08513 8.78525 4.47839 7.30769 6.22391 6.18463C7.96941 5.06154 9.89472 4.5 11.9998 4.5C14.105 4.5 16.0303 5.06154 17.7758 6.18463C19.5213 7.30769 20.9145 8.78525 21.9556 10.6173C22.0389 10.7609 22.0998 10.9056 22.1383 11.0514C22.1767 11.1973 22.196 11.347 22.196 11.5005C22.196 11.654 22.1767 11.8035 22.1383 11.949C22.0998 12.0945 22.0389 12.2391 21.9556 12.3827C20.9145 14.2147 19.5213 15.6923 17.7758 16.8153C16.0303 17.9384 14.105 18.5 11.9998 18.5ZM11.9998 17C13.8832 17 15.6123 16.5041 17.1873 15.5125C18.7623 14.5208 19.9665 13.1833 20.7998 11.5C19.9665 9.81664 18.7623 8.47914 17.1873 7.48748C15.6123 6.49581 13.8832 5.99998 11.9998 5.99998C10.1165 5.99998 8.38734 6.49581 6.81234 7.48748C5.23734 8.47914 4.03317 9.81664 3.19984 11.5C4.03317 13.1833 5.23734 14.5208 6.81234 15.5125C8.38734 16.5041 10.1165 17 11.9998 17Z" fill="#4B5563"/>
+</svg>
diff --git a/html/index.html b/html/index.html
index 604bb306..a8805b70 100644
--- a/html/index.html
+++ b/html/index.html
@@ -20,80 +20,80 @@
 
   <body>
     <header>
-      <nav>
-        <a href="/">
-          <img src="img/pandaface.svg" />
-          <span>판다마켓</span>
+      <nav class="header-nav">
+        <a class="header-logo-shopname" href="/">
+          <img class="header-logo" src="img/pandaface.svg" />
+          <span class="header-shopname">판다마켓</span>
         </a>
         <a href="/login">
-          <button>로그인</button>
+          <button class="header-btn">로그인</button>
         </a>
       </nav>
     </header>
     <main>
       <div class="hero">
         <div class="heromain">
-          <img src="img/Img_home_top.svg" />
-          <h1>일상의 모든 물건을 <br />거래해 보세요</h1>
-          <a href="/items"><button>구경하러 가기</button></a>
+          <img class="heromain-img" src="img/Img_home_top.svg" />
+          <h1 class="heromain-phrase">일상의 모든 물건을 <br />거래해 보세요</h1>
+          <a class="heromain-link" href="/items"><button class="heromain-btn">구경하러 가기</button></a>
         </div>
       </div>
       <section class="hotitem">
         <img class="box-img" src="img/Img_home_01.svg" />
         <div class="box-txt">
-          <h2>Hot Item</h2>
-          <h3>인기 상품을 <br />확인해 보세요</h3>
-          <p>가장 HOT한 중고거래 물품을<br />판다 마켓에서 확인해 보세요</p>
+          <h2 class="box-txt-1">Hot Item</h2>
+          <h3 class="box-txt-2">인기 상품을 <br />확인해 보세요</h3>
+          <p class="box-txt-3">가장 HOT한 중고거래 물품을<br />판다 마켓에서 확인해 보세요</p>
         </div>
       </section>
       <section class="search">
         <img class="box-img" src="img/Img_home_02.svg" />
         <div class="box-txt">
-          <h2>Search</h2>
-          <h3>구매를 원하는 <br />상품을 검색하세요</h3>
-          <p>구매하고 싶은 물품을 검색해서<br />쉽게 찾아보세요</p>
+          <h2 class="box-txt-1">Search</h2>
+          <h3 class="box-txt-2">구매를 원하는 <br />상품을 검색하세요</h3>
+          <p class="box-txt-3">구매하고 싶은 물품을 검색해서<br />쉽게 찾아보세요</p>
         </div>
       </section>
       <section class="register">
         <img class="box-img" src="img/Img_home_03.svg" />
         <div class="box-txt">
-          <h2>Register</h2>
-          <h3>판매를 원하는 <br />상품을 등록하세요</h3>
-          <p>어떤 물건이든 판매하고 싶은 상품을<br />쉽게 등록하세요</p>
+          <h2 class="box-txt-1">Register</h2>
+          <h3 class="box-txt-2">판매를 원하는 <br />상품을 등록하세요</h3>
+          <p class="box-txt-3">어떤 물건이든 판매하고 싶은 상품을<br />쉽게 등록하세요</p>
         </div>
       </section>
       <section class="bottom">
-        <div>
-          <h2>믿을 수 있는<br />판다마켓 중고 거래</h2>
-          <img src="img/Img_home_bottom.svg" />
+        <div class="bottom-wrap">
+          <h2 class="bottom-phrase">믿을 수 있는<br />판다마켓 중고 거래</h2>
+          <img class="bottom-img" src="img/Img_home_bottom.svg" />
         </div>
       </section>
       <footer>
-        <div>
+        <div class="footer-wrap">
           <p class="copyright">©codeit - 2024</p>
           <div class="footer-nav">
-            <a href="/privacy">Privacy Policy</a>
-            <a href="/faq">FAQ</a>
+            <a class="footer-nav-a" href="/privacy">Privacy Policy</a>
+            <a class="footer-nav-a" href="/faq">FAQ</a>
           </div>
-          <ul class="snsicons">
-            <li>
+          <ul class="footer-sns">
+            <li class="footer-sns-li">
               <a href="https://www.facebook.com" target="_blank">
-                <img src="img/ic_facebook.svg" />
+                <img class="footer-sns-ico" src="img/ic_facebook.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.x.com" target="_blank">
-                <img src="img/ic_twitter.svg" />
+                <img class="footer-sns-ico" src="img/ic_twitter.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.youtube.com" target="_blank">
-                <img src="img/ic_youtube.svg" />
+                <img class="footer-sns-ico" src="img/ic_youtube.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.instagram.com" target="_blank">
-                <img src="img/ic_instagram.svg"
+                <img class="footer-sns-ico" src="img/ic_instagram.svg"
               /></a>
             </li>
           </ul>
diff --git a/html/js/functions.js b/html/js/functions.js
new file mode 100644
index 00000000..75dab8e2
--- /dev/null
+++ b/html/js/functions.js
@@ -0,0 +1,193 @@
+function checkEmail() {
+  const emailInput = document.getElementsByClassName("sign-email")[0];
+  const emailError = document.getElementsByClassName("sign-email-error")[0];
+
+  emailInput.classList.remove("error");
+
+  if (!emailInput.value) {
+    emailInput.style.border = "1px solid red";
+    emailError.textContent = "이메일을 입력해주세요.";
+  } else if (!emailInput.checkValidity()) {
+    emailInput.style.border = "1px solid red";
+    emailError.textContent = "잘못된 이메일 형식입니다.";
+  } else {
+    emailInput.style.border = "";
+    emailError.textContent = "";
+  }
+  toggleLoginBtn();
+  toggleSignupBtn();
+}
+
+function checkNickname() {
+  const nicknameInput = document.getElementsByClassName("sign-nickname")[0];
+  const nicknameError = document.getElementsByClassName(
+    "sign-nickname-error"
+  )[0];
+
+  nicknameInput.classList.remove("error");
+
+  if (!nicknameInput.value) {
+    nicknameInput.style.border = "1px solid red";
+    nicknameError.textContent = "닉네임을 입력해주세요.";
+  } else if (nicknameInput.value.length < 3) {
+    nicknameInput.style.border = "1px solid red";
+    nicknameError.textContent = "닉네임을 3자 이상 입력해주세요.";
+  } else {
+    nicknameInput.style.border = "";
+    nicknameError.textContent = "";
+  }
+  toggleLoginBtn();
+  toggleSignupBtn();
+}
+
+function checkPW() {
+  const pwInput = document.getElementsByClassName("sign-pw")[0];
+  const pwError = document.getElementsByClassName("sign-pw-error")[0];
+
+  pwInput.classList.remove("error");
+
+  if (!pwInput.value) {
+    pwInput.style.border = "1px solid red";
+    pwError.textContent = "비밀번호를 입력해주세요.";
+  } else if (pwInput.value.length < 8) {
+    pwInput.style.border = "1px solid red";
+    pwError.textContent = "비밀번호를 8자 이상 입력해주세요.";
+  } else {
+    pwInput.style.border = "";
+    pwError.textContent = "";
+  }
+  toggleLoginBtn();
+}
+
+function checkPWCheck() {
+  const pwInput = document.getElementsByClassName("sign-pw")[0];
+  const pwError = document.getElementsByClassName("sign-pw-error")[0];
+
+  pwInput.classList.remove("error");
+
+  if (!pwInput.value) {
+    pwInput.style.border = "1px solid red";
+    pwError.textContent = "비밀번호를 입력해주세요.";
+  } else if (pwInput.value.length < 8) {
+    pwInput.style.border = "1px solid red";
+    pwError.textContent = "비밀번호를 8자 이상 입력해주세요.";
+  } else {
+    pwInput.style.border = "";
+    pwError.textContent = "";
+  }
+
+  const pwcheckInput = document.getElementsByClassName("sign-pwcheck")[0];
+  const pwcheckError = document.getElementsByClassName("sign-pwcheck-error")[0];
+
+  pwcheckInput.classList.remove("error");
+
+  if (!pwcheckInput.value) {
+    pwcheckInput.style.border = "1px solid red";
+    pwcheckError.textContent = "비밀번호를 입력해주세요.";
+  } else if (pwcheckInput.value.length < 8) {
+    pwcheckInput.style.border = "1px solid red";
+    pwcheckError.textContent = "비밀번호를 8자 이상 입력해주세요.";
+  } else if (pwcheckInput.value !== pwInput.value) {
+    pwcheckInput.style.border = "1px solid red";
+    pwcheckError.textContent = "비밀번호가 일치하지 않습니다.";
+  } else {
+    pwcheckInput.style.border = "";
+    pwcheckError.textContent = "";
+  }
+
+  toggleLoginBtn();
+  toggleSignupBtn();
+}
+
+function toggleLoginBtn() {
+  const emailInput = document.getElementById("login-email");
+  const pwInput = document.getElementById("login-pw");
+  const submitBtn = document.getElementsByClassName("sign-box-submit")[0];
+
+  if (
+    emailInput.value &&
+    pwInput.value.length >= 8 &&
+    emailInput.checkValidity()
+  ) {
+    submitBtn.disabled = false;
+  } else {
+    submitBtn.disabled = true;
+  }
+}
+
+function toggleSignupBtn() {
+  const emailInput = document.getElementById("signup-email");
+  const nicknameInput = document.getElementById("signup-nickname");
+  const pwInput = document.getElementById("signup-pw");
+  const pwcheckInput = document.getElementById("signup-pwcheck");
+  const submitBtn = document.getElementsByClassName("sign-box-submit")[0];
+
+  if (
+    emailInput.checkValidity() &&
+    nicknameInput.value.length >= 3 &&
+    pwInput.value.length >= 8 &&
+    pwcheckInput.value === pwInput.value
+  ) {
+    submitBtn.disabled = false;
+  } else {
+    submitBtn.disabled = true;
+  }
+}
+
+function login(event) {
+  event.preventDefault();
+  window.location.href = "/items";
+}
+
+function signup(event) {
+  event.preventDefault();
+  window.location.href = "/login";
+}
+
+function togglePWVisibility(status) {
+  let pw = document.getElementsByClassName("sign-pw")[0];
+  const off = document.getElementsByClassName("pw-eye-icon-off")[0];
+  const on = document.getElementsByClassName("pw-eye-icon-on")[0];
+
+  if (status === "off") {
+    pw.type = "text";
+    off.style.display = "none";
+    on.style.display = "block";
+  } else {
+    pw.type = "password";
+    off.style.display = "block";
+    on.style.display = "none";
+  }
+}
+
+function togglePWCheckVisibility(status) {
+  let pw1 = document.getElementById("signup-pw");
+  let pw2 = document.getElementById("signup-pwcheck");
+  const imgOff1 = document.getElementsByClassName("pw-eye-icon-off")[0];
+  const imgOff2 = document.getElementsByClassName("pw-eye-icon-off")[1];
+  const imgOn1 = document.getElementsByClassName("pw-eye-icon-on")[0];
+  const imgOn2 = document.getElementsByClassName("pw-eye-icon-on")[1];
+
+  switch (status) {
+    case "off1":
+      pw1.type = "text";
+      imgOff1.style.display = "none";
+      imgOn1.style.display = "block";
+      break;
+    case "off2":
+      pw2.type = "text";
+      imgOff2.style.display = "none";
+      imgOn2.style.display = "block";
+      break;
+    case "on1":
+      pw1.type = "password";
+      imgOff1.style.display = "block";
+      imgOn1.style.display = "none";
+      break;
+    case "on2":
+      pw2.type = "password";
+      imgOff2.style.display = "block";
+      imgOn2.style.display = "none";
+      break;
+  }
+}
diff --git a/html/login.html b/html/login.html
index 9e60a6bc..a1d9d67d 100644
--- a/html/login.html
+++ b/html/login.html
@@ -11,41 +11,43 @@
       crossorigin
       href="https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css"
     />
-    <link rel="preconnect" href="https://fonts.googleapis.com" />
-    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link
-      href="https://fonts.googleapis.com/css2?family=Abel&family=Noto+Sans+KR:wght@100..900&display=swap"
-      rel="stylesheet"
-    />
     <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon" />
+    <script src="js/functions.js" type="text/javascript"></script>
   </head>
 
   <body>
     <header>
-      <nav>
-        <a href="/">
-          <img src="img/pandaface.svg" />
-          <span>판다마켓</span>
+      <nav class="header-nav">
+        <a class="header-logo-shopname" href="/">
+          <img class="header-logo" src="img/pandaface.svg" />
+          <span class="header-shopname">판다마켓</span>
         </a>
         <a href="/login">
-          <button>로그인</button>
+          <button class="header-btn">로그인</button>
         </a>
       </nav>
     </header>
     <main>
-      <div class="login-box">
-        <div class="login-box-head">
-          <img class="login-box-logo" src="img/pandaface.svg" />
-          <span>판다마켓</span>
+      <div class="sign-box">
+        <div class="sign-box-head">
+          <img class="sign-box-logo" src="img/pandaface.svg" />
+          <span class="sign-box-shopname">판다마켓</span>
         </div>
-        <form action="" method="post">
+        <form action="" method="post" onsubmit="login(event)">
           <label for="login-email">이메일</label>
           <input
             type="email"
             name="login-email"
             id="login-email"
             placeholder="이메일을 입력해주세요"
+            minlength="8"
+            maxlength="50"
+            required
+            class="sign-email"
+            onblur="checkEmail()"
           />
+          <p class="sign-email-error"></p>
+
           <label for="login-pw">비밀번호</label>
           <div class="pw-input-box">
             <input
@@ -53,14 +55,29 @@
               name="login-pw"
               id="login-pw"
               placeholder="비밀번호를 입력해주세요"
+              minlength="8"
+              required
+              class="sign-pw"
+              onblur="checkPW()"
+            />
+            <img
+              src="img/pwVisibilityOff.svg"
+              class="pw-eye-icon-off"
+              onclick="togglePWVisibility('off')"
+            />
+            <img
+              src="img/pwVisibilityOn.svg"
+              class="pw-eye-icon-on"
+              onclick="togglePWVisibility('on')"
             />
-            <img src="img/btn_visibility_on_24px.svg" class="pw-eye-icon" />
           </div>
-          <button type="submit">로그인</button>
+          <p class="sign-pw-error"></p>
+
+          <button class="sign-box-submit" type="submit" disabled>로그인</button>
         </form>
         <div class="oauth-bar">
-          <h2>간편 로그인하기</h2>
-          <div>
+          <h2 class="oauth-bar-title">간편 로그인하기</h2>
+          <div class="oauth-icons">
             <a href="https://www.google.com" target="_blank">
               <img src="img/google_ico.svg" />
             </a>
@@ -69,37 +86,37 @@ <h2>간편 로그인하기</h2>
             </a>
           </div>
         </div>
-        <span>
+        <span class="sign-box-bottom">
           판다마켓이 처음이신가요?
-          <a href="/signup" target="_blank">회원가입</a>
+          <a class="sign-box-bottom-link" href="/signup">회원가입</a>
         </span>
       </div>
       <footer>
-        <div>
+        <div class="footer-wrap">
           <p class="copyright">©codeit - 2024</p>
           <div class="footer-nav">
-            <a href="/privacy">Privacy Policy</a>
-            <a href="/faq">FAQ</a>
+            <a class="footer-nav-a" href="/privacy">Privacy Policy</a>
+            <a class="footer-nav-a" href="/faq">FAQ</a>
           </div>
-          <ul class="snsicons">
-            <li>
+          <ul class="footer-sns">
+            <li class="footer-sns-li">
               <a href="https://www.facebook.com" target="_blank">
-                <img src="img/ic_facebook.svg" />
+                <img class="footer-sns-ico" src="img/ic_facebook.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.x.com" target="_blank">
-                <img src="img/ic_twitter.svg" />
+                <img class="footer-sns-ico" src="img/ic_twitter.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.youtube.com" target="_blank">
-                <img src="img/ic_youtube.svg" />
+                <img class="footer-sns-ico" src="img/ic_youtube.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.instagram.com" target="_blank">
-                <img src="img/ic_instagram.svg" />
+                <img class="footer-sns-ico" src="img/ic_instagram.svg" />
               </a>
             </li>
           </ul>
diff --git a/html/signup.html b/html/signup.html
index 9855fe65..fbf47152 100644
--- a/html/signup.html
+++ b/html/signup.html
@@ -11,48 +11,57 @@
       crossorigin
       href="https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css"
     />
-    <link rel="preconnect" href="https://fonts.googleapis.com" />
-    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link
-      href="https://fonts.googleapis.com/css2?family=Abel&family=Noto+Sans+KR:wght@100..900&display=swap"
-      rel="stylesheet"
-    />
     <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon" />
+    <script src="js/functions.js" type="text/javascript"></script>
   </head>
 
   <body>
     <header>
-      <nav>
-        <a href="/">
-          <img src="img/pandaface.svg" />
-          <span>판다마켓</span>
+      <nav class="header-nav">
+        <a class="header-logo-shopname" href="/">
+          <img class="header-logo" src="img/pandaface.svg" />
+          <span class="header-shopname">판다마켓</span>
         </a>
         <a href="/login">
-          <button>로그인</button>
+          <button class="header-btn">로그인</button>
         </a>
       </nav>
     </header>
     <main>
-      <div class="login-box">
-        <div class="login-box-head">
-          <img class="login-box-logo" src="img/pandaface.svg" />
-          <span>판다마켓</span>
+      <div class="sign-box">
+        <div class="sign-box-head">
+          <img class="sign-box-logo" src="img/pandaface.svg" />
+          <span class="sign-box-shopname">판다마켓</span>
         </div>
-        <form action="" method="post">
+        <form action="" method="post" onsubmit="signup(event)">
           <label for="signup-email">이메일</label>
           <input
             type="email"
             name="signup-email"
             id="signup-email"
             placeholder="이메일을 입력해주세요"
+            minlength="8"
+            maxlength="50"
+            required
+            class="sign-email"
+            onblur="checkEmail()"
           />
+          <p class="sign-email-error"></p>
+
           <label for="signup-nickname">닉네임</label>
           <input
             type="text"
             name="signup-nickname"
             id="signup-nickname"
             placeholder="닉네임을 입력해주세요"
+            minlength="3"
+            maxlength="20"
+            required
+            class="sign-nickname"
+            onblur="checkNickname()"
           />
+          <p class="sign-nickname-error"></p>
+
           <label for="signup-pw">비밀번호</label>
           <div class="pw-input-box">
             <input
@@ -60,9 +69,24 @@
               name="signup-pw"
               id="signup-pw"
               placeholder="비밀번호를 입력해주세요"
+              minlength="8"
+              required
+              class="sign-pw"
+              onblur="checkPWCheck()"
+            />
+            <img
+              src="img/pwVisibilityOff.svg"
+              class="pw-eye-icon-off"
+              onclick="togglePWCheckVisibility('off1')"
+            />
+            <img
+              src="img/pwVisibilityOn.svg"
+              class="pw-eye-icon-on"
+              onclick="togglePWCheckVisibility('on1')"
             />
-            <img src="img/btn_visibility_on_24px.svg" class="pw-eye-icon" />
           </div>
+          <p class="sign-pw-error"></p>
+
           <label for="signup-pwcheck">비밀번호</label>
           <div class="pw-input-box">
             <input
@@ -70,14 +94,31 @@
               name="signup-pwcheck"
               id="signup-pwcheck"
               placeholder="비밀번호를 다시 한 번 입력해주세요"
+              minlength="8"
+              required
+              class="sign-pwcheck"
+              onblur="checkPWCheck()"
+            />
+            <img
+              src="img/pwVisibilityOff.svg"
+              class="pw-eye-icon-off"
+              onclick="togglePWCheckVisibility('off2')"
+            />
+            <img
+              src="img/pwVisibilityOn.svg"
+              class="pw-eye-icon-on"
+              onclick="togglePWCheckVisibility('on2')"
             />
-            <img src="img/btn_visibility_on_24px.svg" class="pw-eye-icon" />
           </div>
-          <button type="submit">로그인</button>
+          <p class="sign-pwcheck-error"></p>
+
+          <button class="sign-box-submit" type="submit" disabled>
+            회원가입
+          </button>
         </form>
         <div class="oauth-bar">
-          <h2>간편 로그인하기</h2>
-          <div>
+          <h2 class="oauth-bar-title">간편 로그인하기</h2>
+          <div class="oauth-icons">
             <a href="https://www.google.com" target="_blank">
               <img src="img/google_ico.svg" />
             </a>
@@ -86,37 +127,37 @@ <h2>간편 로그인하기</h2>
             </a>
           </div>
         </div>
-        <span>
+        <span class="sign-box-bottom">
           이미 회원이신가요?
-          <a href="/login" target="_blank">로그인</a>
+          <a class="sign-box-bottom-link" href="/login">로그인</a>
         </span>
       </div>
       <footer>
-        <div>
+        <div class="footer-wrap">
           <p class="copyright">©codeit - 2024</p>
           <div class="footer-nav">
-            <a href="/privacy">Privacy Policy</a>
-            <a href="/faq">FAQ</a>
+            <a class="footer-nav-a" href="/privacy">Privacy Policy</a>
+            <a class="footer-nav-a" href="/faq">FAQ</a>
           </div>
-          <ul class="snsicons">
-            <li>
+          <ul class="footer-sns">
+            <li class="footer-sns-li">
               <a href="https://www.facebook.com" target="_blank">
-                <img src="img/ic_facebook.svg" />
+                <img class="footer-sns-ico" src="img/ic_facebook.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.x.com" target="_blank">
-                <img src="img/ic_twitter.svg" />
+                <img class="footer-sns-ico" src="img/ic_twitter.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.youtube.com" target="_blank">
-                <img src="img/ic_youtube.svg" />
+                <img class="footer-sns-ico" src="img/ic_youtube.svg" />
               </a>
             </li>
-            <li>
+            <li class="footer-sns-li">
               <a href="https://www.instagram.com" target="_blank">
-                <img src="img/ic_instagram.svg" />
+                <img class="footer-sns-ico" src="img/ic_instagram.svg" />
               </a>
             </li>
           </ul>
diff --git a/html/style.css b/html/style.css
index 169e5a94..e0c79a05 100644
--- a/html/style.css
+++ b/html/style.css
@@ -1,38 +1,4 @@
-@font-face {
-  font-family: "ROKAF Sans";
-  src: url("font/ROKAF\ Sans\ Medium.otf") format(".otf");
-}
-
-:root {
-  --blue: #3692ff;
-  --lightblue: #cfe5ff;
-  --gray50: #f9fafb;
-  --gray100: #f3f4f6;
-  --gray200: #e5e7eb;
-  --gray400: #9ca3af;
-  --gray500: #6b7280;
-  --gray600: #4b5563;
-  --gray700: #374151;
-  --gray800: #1f2937;
-  --gray900: #111827;
-}
-
-* {
-  box-sizing: border-box;
-}
-
-a:link {
-  text-decoration: none;
-}
-a:visited {
-  text-decoration: none;
-}
-a:hover {
-  text-decoration: none;
-}
-a:active {
-  text-decoration: none;
-}
+@import "global.css";
 
 html,
 body {
@@ -51,7 +17,7 @@ header {
   z-index: 1;
 }
 
-header > nav {
+.header-nav {
   max-width: 1120px;
   margin: 0 auto;
   display: flex;
@@ -60,18 +26,18 @@ header > nav {
   height: 70px;
 }
 
-header a:first-of-type {
+.header-logo-shopname {
   width: 153px;
   display: flex;
   align-items: center;
   justify-content: space-between;
 }
 
-header img {
+.header-logo {
   width: 40px;
 }
 
-header span {
+.header-shopname {
   font-family: ROKAF Sans;
   font-size: 26px;
   font-weight: 700;
@@ -83,7 +49,7 @@ button:hover {
   cursor: pointer;
 }
 
-header button {
+.header-btn {
   padding: 12px 23px;
   color: var(--gray100);
   border-radius: 8px;
@@ -113,14 +79,14 @@ main {
   top: 200px;
 }
 
-.heromain > img {
+.heromain-img {
   position: absolute;
   bottom: 0;
   right: 0;
   height: 340px;
 }
 
-.heromain > h1 {
+.heromain-phrase {
   font-size: 40px;
   font-weight: 700;
   color: var(--gray700);
@@ -128,7 +94,7 @@ main {
   top: 20px;
 }
 
-.heromain button {
+.heromain-btn {
   padding: 16px 124px;
   background-color: var(--blue);
   font-size: 20px;
@@ -165,20 +131,20 @@ section:not(.bottom):nth-of-type(even) {
   justify-content: center;
 }
 
-.box-txt > h2 {
+.box-txt-1 {
   color: var(--blue);
   font-size: 18px;
   font-weight: 700;
 }
 
-.box-txt > h3 {
+.box-txt-2 {
   color: var(--gray700);
   font-size: 40px;
   font-weight: 700;
   letter-spacing: 0.8px;
 }
 
-.box-txt > p {
+.box-txt-3 {
   color: var(--gray700);
   font-size: 24px;
   font-weight: 500;
@@ -193,20 +159,20 @@ section:not(.bottom):nth-of-type(even) {
   justify-content: center;
 }
 
-.bottom > div {
+.bottom-wrap {
   max-width: 1110px;
   height: 397px;
   display: flex;
   justify-content: space-between;
 }
 
-.bottom h2 {
+.bottom-phrase {
   color: var(--gray700);
   font-size: 40px;
   font-weight: 700;
 }
 
-.bottom img {
+.bottom-img {
   height: 397px;
 }
 
@@ -215,7 +181,7 @@ footer {
   height: 160px;
 }
 
-footer > div {
+.footer-wrap {
   max-width: 1120px;
   width: 100%;
   margin: 0 auto;
@@ -238,33 +204,33 @@ footer > div {
   gap: 40px;
 }
 
-.footer-nav > a {
+.footer-nav-a {
   color: var(--gray200);
   font-size: 16px;
   font-weight: 400;
 }
 
-.snsicons {
+.footer-sns {
   display: inline-block;
   list-style: none;
 }
 
-.snsicons > li {
+.footer-sns-li {
   float: left;
   margin-left: 12px;
 }
 
-.snsicons img {
+.footer-sns-ico {
   height: 20px;
 }
 
-.login-box {
+.sign-box {
   width: 640px;
   margin: 231px auto 231px;
   color: var(--gray800);
 }
 
-.login-box-head {
+.sign-box-head {
   width: 396px;
   height: 132px;
   display: flex;
@@ -273,12 +239,12 @@ footer > div {
   margin: 0 auto 40px;
 }
 
-.login-box-logo {
+.sign-box-logo {
   display: block;
   width: 104px;
 }
 
-.login-box-head > span {
+.sign-box-shopname {
   font-family: ROKAF Sans;
   font-size: 66px;
   font-weight: 700;
@@ -286,13 +252,13 @@ footer > div {
   color: var(--blue);
 }
 
-.login-box label {
+.sign-box label {
   font-size: 18px;
   font-weight: 700;
   width: 100%;
 }
 
-.login-box input {
+.sign-box input {
   font-size: 16px;
   font-weight: 400;
   width: 100%;
@@ -308,17 +274,35 @@ footer > div {
   position: relative;
 }
 
-.pw-eye-icon {
+.pw-eye-icon-off {
+  position: absolute;
+  right: 24px;
+  bottom: 40px;
+}
+
+.pw-eye-icon-on {
+  display: none;
   position: absolute;
   right: 24px;
   bottom: 40px;
 }
 
+.sign-email-error,
+.sign-nickname-error,
+.sign-pw-error,
+.sign-pwcheck-error {
+  font-size: 14px;
+  font-weight: 600;
+  color: red;
+  margin: -16px auto 24px 16px;
+  position: relative;
+}
+
 input:focus {
   outline-color: var(--blue);
 }
 
-.login-box button {
+.sign-box-submit {
   background-color: var(--gray400);
   width: 100%;
   height: 56px;
@@ -329,10 +313,15 @@ input:focus {
   color: var(--gray100);
 }
 
-.login-box button:hover {
+.sign-box-submit:not(disabled):hover {
   background-color: var(--blue);
 }
 
+.sign-box-submit:disabled {
+  background-color: var(--gray400) !important;
+  cursor: not-allowed;
+}
+
 .oauth-bar {
   width: 100%;
   height: 74px;
@@ -345,21 +334,21 @@ input:focus {
   justify-content: space-between;
 }
 
-.oauth-bar > h2 {
+.oauth-bar-title {
   font-size: 16px;
   font-weight: 500;
   height: 26px;
   padding-top: 5px;
 }
 
-.oauth-bar > div {
+.oauth-icons {
   width: 100px;
   height: 42px;
   display: flex;
   justify-content: space-between;
 }
 
-.login-box > span {
+.sign-box-bottom {
   display: inline-block;
   width: 100%;
   font-size: 14px;
@@ -367,7 +356,7 @@ input:focus {
   text-align: center;
 }
 
-.login-box > span > a {
+.sign-box-bottom-link {
   text-decoration: underline;
 }
 
@@ -375,7 +364,7 @@ input:focus {
 }
 
 @media (1199px > width >= 768px) {
-  header > nav {
+  .header-nav {
     padding-left: 24px;
     padding-right: 24px;
   }
@@ -389,14 +378,14 @@ input:focus {
     text-align: center;
   }
 
-  .heromain > img {
+  .heromain-img {
     width: 744px;
     left: 0;
     margin-left: auto;
     margin-right: auto;
   }
 
-  .heromain > h1 {
+  .heromain-phrase {
     display: inline-block;
     left: 0;
     right: 0;
@@ -404,11 +393,11 @@ input:focus {
     margin-top: 0;
   }
 
-  .heromain > h1 br {
+  .heromain-phrase br {
     display: none;
   }
 
-  .heromain > a {
+  .heromain-link {
     display: inline;
     position: absolute;
     width: 100%;
@@ -419,7 +408,7 @@ input:focus {
     text-align: center;
   }
 
-  .heromain button {
+  .heromain-btn {
     position: relative;
     margin: 0 auto;
   }
@@ -446,15 +435,15 @@ input:focus {
     display: inline;
   }
 
-  .box-txt > h3 {
+  .box-txt-2 {
     font-size: 32px;
   }
 
-  .box-txt > h3 br {
+  .box-txt-2 br {
     display: none;
   }
 
-  .box-txt > p {
+  .box-txt-3 {
     font-size: 18px;
   }
 
@@ -462,30 +451,30 @@ input:focus {
     height: 927px;
   }
 
-  .bottom > div {
+  .bottom-wrap {
     flex-direction: column;
     justify-content: initial;
     align-items: center;
     height: fit-content;
   }
 
-  .bottom h2 {
+  .bottom-phrase {
     text-align: center;
     margin-bottom: 217px;
   }
 }
 
 @media (767px > width) {
-  header > nav {
+  .header-nav {
     padding-left: 16px;
     padding-right: 16px;
   }
 
-  header a:first-of-type {
+  .header-logo-shopname {
     justify-content: left;
   }
 
-  header img {
+  .header-logo {
     display: none;
   }
 
@@ -500,7 +489,7 @@ input:focus {
     text-align: center;
   }
 
-  .heromain > img {
+  .heromain-img {
     width: 448px;
     height: 204px;
     left: 0;
@@ -508,7 +497,7 @@ input:focus {
     margin-right: auto;
   }
 
-  .heromain > h1 {
+  .heromain-phrase {
     display: inline-block;
     left: 0;
     right: 0;
@@ -518,11 +507,11 @@ input:focus {
     line-height: 45px;
   }
 
-  .heromain > h1 br {
+  .heromain-phrase br {
     display: initial;
   }
 
-  .heromain > a {
+  .heromain-link {
     display: inline;
     position: absolute;
     width: 240px;
@@ -534,7 +523,7 @@ input:focus {
     margin: 0 auto;
   }
 
-  .heromain button {
+  .heromain-btn {
     position: relative;
     margin: 0 auto;
     font-size: 18px;
@@ -564,19 +553,19 @@ input:focus {
     display: inline;
   }
 
-  .box-txt > h2 {
+  .box-txt-1 {
     font-size: 16px;
   }
 
-  .box-txt > h3 {
+  .box-txt-2 {
     font-size: 24px;
   }
 
-  .box-txt > h3 br {
+  .box-txt-2 br {
     display: none;
   }
 
-  .box-txt > p {
+  .box-txt-3 {
     font-size: 16px;
   }
 
@@ -585,7 +574,7 @@ input:focus {
     margin-top: 83px;
   }
 
-  .bottom > div {
+  .bottom-wrap {
     width: 375px;
     height: 540px;
     display: flex;
@@ -593,19 +582,19 @@ input:focus {
     justify-content: end;
   }
 
-  .bottom h2 {
+  .bottom-phrase {
     text-align: center;
     font-size: 32px;
     line-height: 45px;
     margin-bottom: 131px;
   }
 
-  .bottom img {
+  .bottom-img {
     width: 375px;
     height: 198px;
   }
 
-  footer > div {
+  .footer-wrap {
     max-width: initial;
     height: 96px;
     position: relative;
@@ -628,43 +617,43 @@ input:focus {
     margin: 0;
   }
 
-  .footer-nav > a,
-  .snsicons {
+  .footer-nav-a,
+  .footer-sns {
     white-space: nowrap;
   }
 
-  .footer-nav > a:first-of-type {
+  .footer-nav-a:first-of-type {
     margin-right: 30px;
   }
 
-  .snsicons {
+  .footer-sns {
     position: absolute;
     top: 0;
     right: 16px;
     margin: 0;
   }
 
-  .login-box {
+  .sign-box {
     max-width: 432px;
     width: 100%;
     padding-left: 16px;
     padding-right: 16px;
   }
 
-  .login-box-head {
+  .sign-box-head {
     width: 198px;
     height: 66px;
   }
 
-  .login-box-logo {
+  .sign-box-logo {
     width: 52px;
   }
 
-  .login-box-head > span {
+  .sign-box-shopname {
     font-size: 33px;
   }
 
-  .login-box label {
+  .sign-box label {
     font-size: 14px;
   }
 }
