/* Basic Reset */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Figtree', sans-serif;
}

/*-----------------*/
/*----- Header ----*/
/*-----------------*/
header {
    background-color: #11103f;
    padding: 5px;
    position: sticky;
    top: 0;
    max-height: 80px;
    z-index: 999;
}

header .container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
    gap: 10px;
}

.SUSTEC-logo{
    padding: 0px 20px 0px 20px;
}

header .SUSTEC-logo img {
    max-width: 200px; /* Adjust logo size */
    max-height: 100px;
    height: auto;      /* アスペクト比を保ったまま高さを自動調整 */
    transition: opacity 0.3s ease, filter 0.3s ease; /* 滑らかなホバーとフィルターの効果 */
}

.menu-icon {
    display: none;
    font-size: 24px;
    cursor: pointer;
    position: absolute; /* 追加 */
    right: 20px; /* 追加 */
    top: 10%; /* 追加 */
}


header nav ul {
    list-style-type: none;
    display: flex;
}

header nav ul li {
    position: relative; /* 親要素にrelativeを指定 */
    margin-right: 20px;
}

header nav ul li a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
}

header nav ul li a:hover {
    color: white;
}
/* Dropdown menu styles */
nav ul li.dropdown:hover > .dropdown-menu {
    display: block;
}

nav ul li a {
    color: #333;
    padding: 10px;
    transition: opacity 0.3s ease, filter 0.3s ease; /* 滑らかなホバーとフィルターの効果 */
}

nav ul li a:hover {
    opacity: 0.7; /* Add hover effect */
}

/* Dropdown submenu (hidden by default) */
.dropdown-menu {
    display: none;
    position: absolute;
    left: 0;
    top: 100%;
    background-color: black;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    min-width: 180px;
    z-index: 1;
}
.dropdown-menu li {
    margin: 0;
}
.dropdown-menu li a {
    padding: 10px;
    color: white;
    display: block;
}
.dropdown-menu li a:hover {
    background-color: #00438f;
}

/*-----------------*/
/*  Main Section   */
/*-----------------*/

.contact-all{
    background-image: url("images/Contact_back.png");
    display: flex;
    padding: 100px;
    justify-content: center;
    align-items: center;
    height: auto;
    
}

.contact-section {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    justify-content: center;
    align-items: center;
}

.contact-form h2 {
    margin-bottom: 20px;
    font-size: 28px;
    color: #333;
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

.form-group button {
    width: 100%;
    padding: 12px;
    background-color: #007BFF;
    border: none;
    border-radius: 4px;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.form-group button:hover {
    background-color: #0056b3;
}


/*-----------------*/
/*  aside Section  */
/*-----------------*/

.about {
    height: 300px;
    width: 100%;
    background-image: url("images/SUSTEC_backgroundimg3.png");
    background-size: cover;
    background-position: center;
    align-items: center;
    position: top;
    display: flex;
    justify-content: space-around;
    gap: 20px;
    
}

.about-logo2 img {
    max-width: 400px;
}

.about-contact {
    max-width: 400px;
}

.about-contact h2 {
    font-size: 32px;
    padding: 10px 0px 10px 0px;
    text-decoration: underline;
}

.about-contact p {
    font-size: 18px;
    color: black;
    padding: 10px 0px 10px 0px;
    /*line-height: 1.6;*/
}
.about-linkedin h2 {
    font-size: 32px;
    padding: 10px 100px 10px 0px;
    text-decoration: underline;
}
.social-media {
    margin-top: 20px;
}

.social-media img {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.social-media img:hover {
    opacity: 0.7;
    transform: scale(1.1);
}

/* Footer */
footer {
    background-color: #11103f;
    /*background-color: rgb(223, 222, 222);*/
    color: white;
    padding: 20px 0 20px 0;
    text-align: center;
}
/* ----------------------------------- */
/* ----------------------------------- */
/* Media Queries for Responsive Design */
/*------------------------------------ */
/* ----------------------------------- */

@media (max-width: 768px) {
    
    /* Header modification*/
        header {
            background-color: #11103f;
            color: #fff;
            padding: 10px 0 10px 0;
        }
        .menu-icon {
            display: block;
        }
        .dropdown-menu {
            display: none;
          }
        .dropdown:hover .dropdown-menu {
            display: none;
          }
    
        .nav {
            background-color: #11103f;
            height: auto;
        }
        .nav-links {
            display: none;
            flex-direction: column;
            width: auto;
            background-color: #11103f;
            position: absolute;
            top: 45px;
            right: 10px;
            height: 0; /* 追加 */
            overflow: hidden; /* 追加 */
            transition: height 0.3s ease; /* 追加 */
        }
    
        .nav-links li {
            text-align: center;
            margin: 10px 0;
        }
    
        .nav-links a {
            padding: 10px;
        }
    
        .nav-links.active {
            display: flex;
            height: auto; /* 追加：全画面の高さに設定 */
        }
    /* Main part modification*/
    
        .contact-form h2 {
            font-size: 24px;
        }    
        .contact-form label {
            font-size: 16px;
        }    
        .contact-all {
            width: 100%;
            height: auto;
            padding: 120px 10px 100px 10px;
        }    
    

          .about {
            flex-direction: column;
            align-items:start;
            gap: 0px;
        }
        .about-logo2 img{
            width: 200px;
        }
        .about-contact h2{
            font-size: 18px;
            padding: 0px 10px 10px 20px;
        }
        .about-contact p{
            padding: 0px 10px 0 20px;
            font-size: 14px;
        
        }
        .about-linkedin h2{
            font-size: 18px;
            padding: 10px 10px 0 20px;
        }
        
        .social-media img{
             margin: 0px 10px 10px 20px;
        }
    
    
    }