html,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    font-family: Arial, sans-serif;
}

header {
    background-color: #275929;
    color: white;
    padding: 10px 20px;
    text-align: center;
}

article {
    padding: 20px;
}

footer {
    background-color: #f1f1f1;
    color: #333;
    text-align: center;
    padding: 10px 20px;
}

a {
    color: #275929;
    text-decoration: none;
}

textarea {
    height: 50vh;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: none;
}

#copy-button {
    background-color: #275929;
    color: white;
    border: none;
    padding: 7px 10px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    position: absolute;
    right: 10px;
    top: 10px;
}

#copy-button::before {
    /* Unicode for clipboard icon */
    content: '\1F4CB';
    font-size: 16px;
}

#copy-button:focus,
#copy-button:hover {
    background-color: #45a049;
}

#copy-button:active {
    background-color: #3e8e41;
}

#copy-button:disabled {
    filter: grayscale(100%);
    cursor: not-allowed;
    pointer-events: none;
}

#copy-button:disabled::before {
    /* Unicode for check mark icon */
    content: '\2705';
}

.container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 800px) {
    .container {
        grid-template-columns: 1fr;
    }
}

.container-item {
    position: relative;
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.error-txt {
    color: red;
    font-weight: bold;
    margin-top: 10px;
}