body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    padding: 0;
    margin: 0;
}

.converter-container {
    background-color: #ffffff;
    border: 1px solid #000000; /* Black border */
    padding: 30px;
    border-radius: 10px;
    width: 100%;
    max-width: 1200px;
    margin: 10px auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #000000; /* Black text */
    text-align: center;
}

label {
    color: #000000; /* Black text */
    font-weight: bold;
    display: block;
    margin-bottom: 8px;
}

.input-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.input-container div {
    flex: 1;
    min-width: 350px;
    max-width: 500px;
}

textarea {
    width: 100%;
    padding: 12px;
    border-radius: 5px;
    border: 1px solid #000000; /* Black border */
    background-color: #f0f0f0; /* Grey-white */
    resize: vertical;
    height: 180px;
    color: #000000; /* Black text */
}

button {
    background-color: #000000; /* Black background */
    color: white;
    font-size: 18px;
    padding: 10px 350px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    display: block;
    margin: 20px auto;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #333333; /* Dark grey on hover */
}

.result-container {
    display: none;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #000000; /* Black border */
}

.result-container h3 {
    color: #000000; /* Black text */
}

.copy-btn {
    background-color: #000000; /* Black background */
    color: white;
    padding: 10px;
    margin-top: 10px;
    display: inline-block;
    border-radius: 5px;
    cursor: pointer;
}

.copy-btn:hover {
    background-color: #333333; /* Dark grey hover */
}

.result-container textarea {
    background-color: #f0f0f0; /* Grey-white */
    border: 1px solid #000000; /* Black border */
    color: #000000; /* Black text */
}