body {
    background-color: #f5f6f7; /* 네이버 배경색 */
    font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    width: 100%;
    max-width: 460px; /* 중고나라/네이버 표준 너비 */
    padding: 20px;
    box-sizing: border-box;
}

h2 {
    text-align: center;
    font-size: 32px;
    color: #03c75a; /* 네이버 메인 컬러 */
    margin-bottom: 30px;
}

/* 입력창 레이아웃 */
.input-group {
    background: #fff;
    border: 1px solid #dadada;
    padding: 10px 14px;
    margin-bottom: 10px;
    border-radius: 4px;
    display: flex;
    align-items: center;
}

.input-group:focus-within {
    border-color: #03c75a; /* 포커스 시 색상 변경 */
}

input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 15px;
    padding: 5px 0;
}

/* 버튼 디자인 */
button {
    width: 100%;
    padding: 15px;
    background-color: #03c75a;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 10px;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

/* 소셜 로그인 디자인 (중고나라 스타일) */
.social-login a {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    border-radius: 6px;
    margin-bottom: 10px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
}

.kakao-btn { background: #fee500; color: #3c1e1e; }
.naver-btn { background: #03c75a; color: #fff; }
.google-btn { background: #fff; color: #757575; border: 1px solid #dadada; }

.link-group {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: #8e8e8e;
}

.link-group a {
    color: #8e8e8e;
    text-decoration: none;
    margin: 0 5px;
}