body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    text-align: center;
}

header {
    background-color: #1f2937;
    padding: 20px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 0 20px;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-container img {
    height: 50px;
    width: auto;
    margin-right: 15px;
    display: block;
}

@media (max-width: 768px) {
    .logo-container img {
        height: 40px;
        max-width: 120px;
    }
}

.logo-container img[onerror] {
    display: none;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: white;
    font-family: 'Arial', sans-serif;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
}

.user-options a {
    font-family: Arial, sans-serif;
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

.user-options a:hover {
    color: #f0f0f0;
}

.language-select {
    font-family: Arial, sans-serif;
    font-size: 14px;
    background-color: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
}

/* 히어로 섹션 */
.hero {
    background: url('web_images/hero-banner.jpg') no-repeat center center/cover;
    height: 450px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    color: white;
    font-size: 32px;
    font-weight: bold;
    text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.7);
}

.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

@media (max-width: 768px) {
    .hero {
        font-size: 24px;
    }
}

/* 섹션 박스 */
.content-section {
    max-width: 1100px;
    padding: 60px 40px;
    background-color: #ffffff;
    margin: 50px auto;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: max-height 0.5s ease-in-out;
}

/* 확장 섹션 */
.expandable-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out;
}

/* 버튼 스타일 */
.toggle-button {
    font-size: 18px;
    padding: 12px 24px;
    margin-top: 10px;
    background-color: #1f2937;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease-in-out, transform 0.2s;
}

.toggle-button:hover {
    background-color: #374151;
    transform: scale(1.05);
}

/* 🔹 모바일 버튼 크기 조정 */
@media (max-width: 768px) {
    .toggle-button {
        font-size: 16px;
        padding: 10px 20px;
    }
}

/* 회사 이미지 꾸미기 */
/*
.styled-image {
    max-width: 100%;
margin: 20px auto;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}
*/

/* 회사 이미지 스타일 */
.styled-image {
    display: block;
    margin: 20px auto;
    width: 50%;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 1s ease-in-out, transform 0.5s ease-in-out;
}

/* 모바일 화면에서 이미지 크기 자동 조정 */
@media (max-width: 768px) {
    .styled-image {
        width: 80%;
        max-width: 300px;
    }
}

/* 섹션 애니메이션 */
.expandable-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.8s ease-out;
}


/* 푸터 */
footer {
    background-color: #1f2937;
    color: white;
    padding: 15px;
    font-size: 14px;
}