* { box-sizing: border-box; }
body {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans KR', sans-serif;
    background-color: white;
    color: #333;
}
.container {
    width: 100%;
    max-width: 360px;
    margin: 40px auto;
    padding: 0 20px;
}
.section {
    margin-bottom: 48px;
    text-align: center;
}
.section img {
    width: 100px;
    margin-bottom: 16px;
}
.section p {
    font-size: 14px;
    line-height: 1.6;
    margin: 0 0 12px;
}
.section b {
    color: #e74c3c;
}
.section a.button {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 0;
    width: 100%;
    background-color: #444;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: background-color 0.2s;
}
.section a.button:hover {
    background-color: #222;
}
h3 {
    text-align: left;
    font-size: 15px;
    margin-bottom: 15px;
    border-left: 4px solid #888;
    padding-left: 10px;
}
form input[type="text"],
form input[type="password"],
form input[type="submit"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
form input[type="submit"] {
    background-color: #444;
    color: white;
    font-weight: bold;
    cursor: pointer;
}
form input[type="submit"]:hover {
    background-color: #222;
}
.social-buttons button {
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    font-size: 14px;
    background-color: #f0f0f0;
    color: #333;
    cursor: pointer;
}
.social-buttons button:hover {
    background-color: #ddd;
}
.divider {
    height: 1px;
    background-color: #ddd;
    margin: 40px 0;
}
.certify input[type="button"] {
    width: 100%;
    padding: 10px;
    background-color: #f0f0f0;
    border: none;
    color: #333;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    margin-bottom: 10px;
}
.certify input[type="button"]:hover {
    background-color: #ddd;
}
.certify input[type="button"]:disabled {
    background-color: #ccc;
    color: #999;
    cursor: not-allowed;
}
.certify p {
    font-size: 13px;
    color: #666;
    line-height: 1.5;
    margin-top: 12px;
    text-align: left;
}

/* NICE 인증용 추가 스타일 (기존 디자인과 완전히 동일) */
.message {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    text-align: center;
    font-size: 14px;
    display: none;
}
.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}
.loading {
    display: none;
    text-align: center;
    padding: 10px;
    font-style: italic;
    color: #666;
    font-size: 14px;
}
#googleLoginBtn {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    background-color: #4285f4;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Roboto', Arial, sans-serif;
    user-select: none;
    transition: background-color 0.3s;
}
#googleLoginBtn:hover {
    background-color: #357ae8;
}
#googleLoginBtn img {
    width: 18px;
    height: 18px;
    margin-right: 10px;
}

/* 리뉴얼 안내 모달 스타일 */
.renewal-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    justify-content: center;
    align-items: center;
    z-index: 9999;

    /* 💡 핵심 변경 */
    display: flex; /* 유지해도 되지만 visibility와 opacity 방식 사용 */
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.renewal-modal-overlay.show {
    visibility: visible;
    opacity: 1;
}

.renewal-modal {
    background-color: #ffffff;
    width: 90%;
    max-width: 400px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    padding: 0;
    text-align: center;
    overflow: hidden;
}

.renewal-modal-header {
    background-color: #f8f9fa;
    padding: 24px 20px 20px;
    border-bottom: 1px solid #e9ecef;
}

.renewal-modal-title {
    font-size: 25px;
    font-weight: bold;
    color: #2d3436;
    margin: 0 0 8px 0;
    letter-spacing: -0.5px;
}

.renewal-modal-subtitle {
    font-size: 14px;
    color: #636e72;
    margin: 0;
    font-weight: 400;
}

.renewal-modal-body {
    padding: 28px 24px;
}

.renewal-modal-content {
    font-size: 15px;
    line-height: 1.6;
    color: #2d3436;
    margin-bottom: 20px;
}

.renewal-modal-highlight {
    background-color: #f1f3f4;
    padding: 16px;
    border-radius: 8px;
    border-left: 4px solid #74b9ff;
    margin: 20px 0;
}

.renewal-modal-highlight-text {
    font-size: 14px;
    color: #2d3436;
    margin: 0;
    font-weight: 500;
}

.renewal-modal-footer {
    padding: 0 24px 28px;
}

.renewal-modal-button {
    width: 100%;
    padding: 14px 0;
    background-color: #636e72;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-family: 'Noto Sans KR', sans-serif;
}

.renewal-modal-button:hover {
    background-color: #2d3436;
}

.renewal-modal-apology {
    font-size: 13px;
    color: #74b9ff;
    margin-top: 12px;
    font-weight: 500;
}

#g_id_signin {
    width: 100% !important;
    height: 40px !important;
    max-width: 320px;
    margin: 0 auto;
}

/* 모바일 반응형 스타일 - 768px 이하에서만 적용 */
@media (max-width: 768px) {
    .container {
        max-width: 95%;
        margin: 25px auto;
        padding: 0 20px;
    }

    .section {
        margin-bottom: 50px;
    }

    .section img {
        width: 150px;
        margin-bottom: 25px;
    }

    .section p {
        font-size: 18px;
        line-height: 1.8;
        margin: 0 0 20px;
    }

    .section a.button {
        padding: 18px 0;
        font-size: 18px;
        border-radius: 8px;
    }

    h3 {
        font-size: 20px;
        margin-bottom: 22px;
        padding-left: 15px;
        border-left: 6px solid #888;
    }

    form input[type="text"],
    form input[type="password"],
    form input[type="submit"] {
        padding: 18px;
        margin-bottom: 15px;
        font-size: 18px;
        border-radius: 8px;
    }

    .social-buttons button {
        padding: 18px;
        margin-bottom: 15px;
        font-size: 18px;
        border-radius: 8px;
    }

    .social-buttons div {
        margin-bottom: 15px;
    }

    .social-buttons img {
        border-radius: 8px;
    }

    .divider {
        margin: 45px 0;
    }

    .certify input[type="button"] {
        padding: 18px;
        font-size: 18px;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .certify p {
        font-size: 16px;
        line-height: 1.7;
        margin-top: 20px;
    }

    .message {
        padding: 15px;
        font-size: 17px;
        margin-bottom: 22px;
    }

    .loading {
        padding: 15px;
        font-size: 17px;
    }

    #googleLoginBtn {
        padding: 18px 28px;
        font-size: 18px;
        border-radius: 8px;
    }

    #googleLoginBtn img {
        width: 22px;
        height: 22px;
        margin-right: 15px;
    }

    /* 구글 로그인 버튼 컨테이너 크기 조정 */
    #g_id_signin {
        width: 100% !important;
        height: 56px !important;
        max-width: none;
    }

    /* 리뉴얼 모달 모바일 최적화 */
    .renewal-modal {
        width: 92%;
        max-width: 450px;
    }

    .renewal-modal-title {
        font-size: 21px;
    }

    .renewal-modal-subtitle {
        font-size: 17px;
    }

    .renewal-modal-content {
        font-size: 18px;
        line-height: 1.8;
    }

    .renewal-modal-highlight-text {
        font-size: 17px;
    }

    .renewal-modal-button {
        padding: 18px 0;
        font-size: 18px;
    }

    .renewal-modal-apology {
        font-size: 16px;
    }
}

/* 작은 모바일 화면 (480px 이하) */
@media (max-width: 480px) {
    .container {
        max-width: 98%;
        margin: 20px auto;
        padding: 0 15px;
    }

    .section {
        margin-bottom: 45px;
    }

    .section img {
        width: 130px;
        margin-bottom: 22px;
    }

    .section p {
        font-size: 17px;
        line-height: 1.8;
    }

    .section a.button {
        padding: 16px 0;
        font-size: 17px;
    }

    h3 {
        font-size: 19px;
        margin-bottom: 20px;
    }

    form input[type="text"],
    form input[type="password"],
    form input[type="submit"] {
        padding: 16px;
        font-size: 17px;
        margin-bottom: 14px;
    }

    .social-buttons button {
        padding: 16px;
        font-size: 17px;
        margin-bottom: 14px;
    }

    .social-buttons div {
        margin-bottom: 14px;
    }

    .certify input[type="button"] {
        padding: 16px;
        font-size: 17px;
        margin-bottom: 14px;
    }

    .certify p {
        font-size: 15px;
        line-height: 1.7;
    }

    #googleLoginBtn {
        padding: 16px 24px;
        font-size: 17px;
    }

    #g_id_signin {
        height: 54px !important;
    }

    .renewal-modal {
        width: 96%;
    }

    .renewal-modal-title {
        font-size: 20px;
    }

    .renewal-modal-content {
        font-size: 17px;
    }

    .renewal-modal-highlight-text {
        font-size: 16px;
    }

    .renewal-modal-button {
        padding: 17px 0;
        font-size: 17px;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    border: 0;
    padding: 0;
    white-space: nowrap;
    clip-path: inset(100%);
    clip: rect(0 0 0 0);
    overflow: hidden;
}