body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #006400; /* Green */
    padding: 10px 20px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.navbar .logo img {
    height: 40px;
}

.headline {
    text-align: center;
    background-color: #004d00; /* Dark Green */
    color: white;
    padding: 50px 20px;
    margin-top: 60px;
}

.headline h1 {
    font-size: 36px;
    font-weight: bold;
}

.headline p {
    font-size: 18px;
}

.content {
    background-color: white;
    padding: 40px 20px;
    margin-top: 20px;
}

.converter-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.converter-container input, .converter-container select, .converter-container button {
    margin: 10px;
    padding: 10px;
    font-size: 16px;
    width: 200px;
    border: 1px solid #ccc;
}

#convert-btn {
    background-color: #006400;
    color: white;
    cursor: pointer;
}

#convert-btn:hover {
    background-color: #004d00;
}

#swap-btn {
    background-color: #cccccc;
    color: black;
    cursor: pointer;
    margin-top: 10px;
}

#swap-btn:hover {
    background-color: #b3b3b3;
}

.how-to-use {
    background-color: #004d00; /* Dark Green */
    color: white;
    padding: 30px 20px;
    margin-top: 20px;
    text-align: center;
}

.how-to-use h2 {
    font-weight: bold;
}

.steps {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.step {
    background-color: #e0e0e0; /* Gray */
    padding: 20px;
    margin: 10px;
    width: 200px;
    border-radius: 8px;
    text-align: center;
}

.step h3 {
    font-weight: bold;
}

.footer {
    background-color: #666666; /* Dark Gray */
    color: white;
    padding: 20px 0;
    text-align: center;
    margin-top: 40px;
}

.footer-content p {
    margin: 5px 0;
}

@media screen and (max-width: 768px) {
    .steps {
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .converter-container {
        width: 100%;
    }

    .footer-content p {
        font-size: 14px;
    }
}