/* Basic Style for Kouya Group */
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f9f9f9;
}

header {
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

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

nav ul li {
    margin-left: 20px;
}

nav a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

main {
    max-width: 960px;
    margin: 40px auto;
    padding: 0 20px;
}

section {
    margin-bottom: 40px;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

h2 {
    border-bottom: 2px solid #0056b3;
    padding-bottom: 10px;
    margin-top: 0;
    color: #0056b3;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    margin-top: 60px;
}

footer a {
    color: #fff;
    text-decoration: underline;
}

.button-link {
    display: inline-block;
    background-color: #0056b3;
    color: #fff;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 10px;
}

.button-link:hover {
    background-color: #004494;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    nav {
        width: 100%;
        margin-top: 15px;
    }

    nav ul {
        flex-direction: column;
    }

    nav ul li {
        margin-left: 0;
        margin-bottom: 10px;
        border-bottom: 1px solid #eee;
        padding-bottom: 5px;
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    main {
        margin: 20px auto;
    }

    section {
        padding: 20px;
    }
}