body {
    font-family: sans-serif;
    box-sizing: border-box;
}

.container {
    width: fit-content;
    margin: auto;
    margin-top: 10%;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

#input-area {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 10px 0;
}

#from-div, #to-div {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input[type="text"] {
    padding: 5px 10px;
    font-size: 1rem;
    border: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    transition: 0.3s ease;
    outline: none;
}

input[type="text"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 0, 255, 0.3);
}

#convert {
    background-color: #198754;
    border: none;
    font-size: 1rem;
    padding: 6px 12px;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.2s ease;
    font-weight: 400;
    outline: none;
}

#convert:hover {
    background-color: #157247;
}

select {
    font-size: 1rem;
    padding: 5px 10px;
    border: 1px solid rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s ease;
    outline: none;
}

select:focus {
    /* border: 1px solid rgba(0, 0, 255, 0.5); */
    box-shadow: 0 0 0 3px rgba(0, 0, 255, 0.3);
}

.warning-message-text {
    margin: -10px 0 0 ;
    font-size: 13px;
    color: red;
    opacity: 0;
    transition: 0.2s ease;
    height: 5px;
}

.warning-message-text.show {
    opacity: 1;
}

@media (max-width: 620px) {
    .container {
        width: 80%;
    }

    #input-area {
        flex-direction: column;
        gap: 5px;
    }

    #convert {
        margin-top: 20px;
    }
}