feat: 모임 참가 페이지 UI 구축

app/join/page.tsx

@@ -0,0 +1,115 @@
+'use client';
+
+import { useState } from 'react';
+
+export default function JoinMeetingPage() {
+  const [name, setName] = useState('');
+  const [password, setPassword] = useState('');
+  const [isRemembered, setIsRemembered] = useState(true);
+
+  // 이름/비번 유효성 검사 (입력값이 있을 때만 버튼 활성화)
+  const isFormValid = name.length > 0 && password.length === 4;
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!isFormValid) return;
+
+    console.log('참여 요청:', { name, password, isRemembered });
+  };
+
+  return (
+    <div className="flex flex-col items-center justify-center gap-11 bg-white px-5 py-10 md:min-h-[calc(100vh-200px)] md:justify-center">
+      {/* 타이틀 */}
+      <h1 className="w-full text-[22px] font-semibold text-black md:max-w-sm">
+        모임에 참여해 주세요.
+      </h1>
+
+      <form onSubmit={handleSubmit} className="flex w-full flex-col gap-5 md:max-w-sm">
+        {/* 이름 입력 */}
+        <div className="flex flex-col gap-2">
+          <label htmlFor="name" className="text-gray-9 text-sm font-semibold">
+            이름을 입력해주세요.
+          </label>
+          <input
+            id="name"
+            type="text"
+            value={name}
+            onChange={(e) => setName(e.target.value)}
+            placeholder="최대 20자 이내로 입력해주세요"
+            maxLength={20}
+            className="border-gray-2 placeholder:text-gray-3 text-gray-10 focus:border-blue-5 w-full rounded-sm border py-2 pl-3 text-[15px] focus:bg-white focus:outline-none"
+          />
+        </div>
+
+        {/* 비밀번호 입력 */}
+        <div className="flex flex-col gap-2">
+          <label htmlFor="password" className="text-gray-9 text-sm font-semibold">
+            비밀번호를 입력해주세요
+          </label>
+          <input
+            id="password"
+            type="password"
+            inputMode="numeric"
+            value={password}
+            onChange={(e) => {
+              // 4자리 숫자만 입력받도록 처리하기
+              const val = e.target.value.replace(/[^0-9]/g, '');
+              if (val.length <= 4) setPassword(val);
+            }}
+            placeholder="숫자 4자리를 입력해주세요"
+            className={`border-gray-2 placeholder:text-gray-3 text-gray-10 focus:border-blue-5 w-full rounded-sm border py-2 pl-3 text-center text-[15px] focus:bg-white focus:outline-none ${password ? 'pl-0 text-center' : 'pl-3 text-left'}`}
+          />
+          {/* 체크박스 */}
+          <div
+            onClick={() => setIsRemembered(!isRemembered)}
+            className="flex cursor-pointer items-center gap-2"
+          >
+            {/* 체크 아이콘 박스 */}
+            <div
+              className={`flex h-5 w-5 items-center justify-center rounded border transition-colors ${
+                !isRemembered
+                  ? 'border-gray-300 bg-white' // 1. 체크가 안 된 경우
+                  : isFormValid
+                    ? 'border-blue-500 bg-blue-500' // 2. 체크가 됐고, 이름/비번을 제대로 입력한 경우
+                    : 'border-gray-300 bg-gray-300' // 3. 체크가 됐으나, 입력이 제대로 안 된 경우
+              }`}
+            >
+              {isRemembered && (
+                <svg
+                  width="8"
+                  height="6"
+                  viewBox="0 0 14 10"
+                  fill="none"
+                  xmlns="http://www.w3.org/2000/svg"
+                >
+                  <path
+                    d="M1 5L4.5 8.5L13 1"
+                    stroke="white"
+                    strokeWidth="2"
+                    strokeLinecap="round"
+                    strokeLinejoin="round"
+                  />
+                </svg>
+              )}
+            </div>
+            <span className={`text-xs font-medium ${isFormValid ? 'text-blue-5' : 'text-gray-5'}`}>
+              내 정보 기억하기
+            </span>
+          </div>
+        </div>
+        {/* 하단 버튼 */}
+        <button
+          type="submit"
+          disabled={!isFormValid}
+          className={`text-gray-2 h-12 w-full rounded-sm py-4 pt-3 pb-2.5 text-lg font-semibold transition-colors md:max-w-sm ${
+            isFormValid
+              ? 'hover:bg-blue-8 bg-blue-5' // 활성화 상태
+              : 'bg-gray-4 cursor-not-allowed' // 비활성화 상태
+          }`}
+        >
+          모임 참여하기
+        </button>
+      </form>
+    </div>
+  );
+}

app/share/page.tsx

@@ -6,7 +6,7 @@
 import { useState } from 'react';
 
 export default function ShareLinkPage() {
   const [link, setLink] = useState('www.abcabc');
   const { isVisible, show } = useToast();
 
   const handleCopyLink = async () => {
@@ -55,7 +55,7 @@
       </div>
 
       <Link
-        href="/"
+        href="/join"
         className="bg-blue-5 hover:bg-blue-8 h-12 w-full rounded-sm py-2.5 pt-3 text-center text-lg font-normal text-white transition-colors md:w-90"
       >
         내 출발지 등록하기