:root {
    --bg-color: #121212;
    --primary-text-color: #E0E0E0;
    --secondary-text-color: #B0B0B0;
    --card-bg-color: #1E1E1E;
    --accent-color: #03DAC6;
}

body {
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.8;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.lang-section {
    background-color: var(--card-bg-color);
    border-radius: 12px;
    padding: 20px 40px;
    margin-bottom: 40px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5em;
    color: #ffffff;
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    text-align: center;
    justify-content: center;
}

h1 img {
    margin-right: 20px;
    width: 60px;
    height: 60px;
}

h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8em;
    color: #ffffff;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    margin-top: 40px;
    margin-bottom: 20px;
}

p, li {
     color: var(--secondary-text-color);
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

hr {
    border: 0;
    height: 1px;
    background-color: var(--card-bg-color);
    margin: 60px 0;
}