/* Estilo general */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    display: flex;
    justify-content: flex-end;
    padding: 1rem 2rem;
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header button {
    padding: 0.5rem 1rem;
    border: none;
    background-color: #4CAF50;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

textarea {
    width: 100%;
    max-width: 600px;
    height: 200px;
    padding: 1rem;
    font-size: 1rem;
    border-radius: 8px;
    border: 1px solid #ccc;
    resize: vertical;
}

button#send {
    margin-top: 1rem;
    padding: 0.7rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: #007BFF;
    color: white;
    cursor: pointer;
}

#message {
    margin-top: 1rem;
    font-size: 1rem;
}

#message.success {
    color: green;
}

#message.error {
    color: red;
}

a.whatsapp-link {
    color: #25D366;
    text-decoration: none;
    font-weight: bold;
    margin-left: 0.5rem;
}
/* --- Responsive CSS --- */

/* Para pantallas pequeñas (< 768px) */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.5rem 1rem;
    }

    header button {
        width: 100%;
        margin-top: 0.5rem;
    }

    main {
        padding: 1rem;
    }

    #htmlInput {
        width: 100%;
        min-height: 180px;
    }

    #send {
        width: 100%;
        margin-top: 0.5rem;
    }

    #message {
        width: 100%;
    }
}

/* Para pantallas muy pequeñas (< 480px) */
@media (max-width: 480px) {
    #htmlInput {
        font-size: 0.9rem;
        padding: 0.8rem;
    }

    #send {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }
}