body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    padding: 40px;
}

.container {
    max-width: 700px;
    margin: auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
}

h1 {
    color: #1f3b5b;
}

.description {
    margin-bottom: 30px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}

button {
    background-color: #1f3b5b;
    color: white;
    padding: 12px 20px;
    border: none;
    cursor: pointer;
}

.result {
    margin-top: 25px;
    padding: 20px;
    background-color: #eef3f8;
    border-radius: 8px;
}

.explanation {
    margin-top: 30px;
    padding: 20px;
    background-color: #fafafa;
    border-radius: 8px;
}

.explanation h2 {
    margin-top: 0;
    color: #1f3b5b;
}

.formula {
    font-size: 1.2rem;
    font-weight: bold;
    background-color: #eef3f8;
    padding: 12px;
    border-radius: 6px;
}

.explanation li {
    margin-bottom: 8px;
}

.note {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

.language-switcher {
    text-align: right;
    margin-bottom: 20px;
}

.language-switcher a {
    color: #1f3b5b;
    text-decoration: none;
    font-weight: bold;
    margin-left: 10px;
}

.language-switcher a:hover {
    text-decoration: underline;
}