*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Times New Roman', 'Times', serif;
    margin: 0;
    padding: 0;
}

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

header img {
    max-width: 100%;
    height: auto;
}

h1 {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3.75rem);
    margin: 10px 0;
}

.navbar ul {
    list-style-type: none;
    background-color: #5f5f5f;
    padding: 0;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    max-width: 1400px;
    justify-content: center;
}

.navbar li {
    position: relative;
}

.navbar > ul > li > a {
    color: white;
    text-decoration: none;
    padding: 15px 20px;
    display: block;
    text-align: center;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
}

.navbar a:hover {
    background-color: #242424;
}

.dropdown a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    font-size: 16px;
    font-weight: bold;
}

.dropdown .content {
    display: none;
    position: absolute;
    background-color: #696969;
    min-width: 100px;
    z-index: 10;
}

.dropdown:hover .content {
    display: block;
}

main {
    margin: 15px;
}

main > h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    text-align: center;
    margin: 20px auto;
}

main > h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    text-align: center;
    margin: 15px auto;
}

main > a {
    font-size: 18px;
    text-align: center;
    display: block;
    margin: 10px auto;
}

.common-text {
    max-width: 1400px;
    white-space: pre-line;
    text-align: left;
    padding: 0 15px;
    line-height: 1.6;
    font-size: 18px;
    margin: 0 auto;
}

.carousel-container {
    width: 100%;
    overflow: hidden;
    padding: 20px 0;
    margin: 40px auto 0 auto;
    max-width: 1400px;
}

.carousel-track {
    display: flex;
    width: max-content;
    animation: scroll 20s linear infinite;
    gap: 10px;
}

.card {
    flex: 0 0 auto;
    width: 200px;
    height: 300px;    
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.social-logo {
    width: 44px;                  
    height: auto;                 
    vertical-align: middle;      
    margin-right: 8px;            
}

.social-link {
    text-decoration: none;
    color: black;
}

section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2em;
    flex-wrap: wrap;
}

.box {
    max-width: 600px;
    width: 100%;
}

iframe {
    border-radius: 2em;
    max-width: 100%;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }

    .navbar > ul > li > a {
        padding: 10px 12px;
        font-size: 15px;
    }

    .common-text {
        font-size: 16px;
        padding: 0 10px;
    }

    section {
        gap: 1em;
    }
}

@media (hover:none) {
    .dropdown:active .content,
    .dropdown:focus-within .content {
        display: block;
    }
}