html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.2s, color 0.2s;
}

/* Light mode colors */
:root {
    --background-color: white;
    --text-color: #000;
    --textarea-background-color: white;
    --textarea-border-color: black;
    --preview-background-color: white;
}

.container {
    display: flex;
    height: 75vh;
}

#fullsize-input, #preview {
    flex: 1;
    margin: 4px;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid var(--textarea-border-color);
    background-color: var(--textarea-background-color);
    color: var(--text-color);
}

#fullsize-input {
    resize: none;
}

#preview {
    overflow: auto;
    background-color: var(--preview-background-color);
}


.dark-mode {
    --background-color: black;
    --text-color: white;
    --textarea-background-color: black;
    --textarea-border-color: white;
    --preview-background-color: black;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
}

#image-container {
    width: 100%;
    border: 1px solid var(--textarea-border-color);
    margin-top: 10px;
    padding: 5px;
    min-height: 50px;
    background-color: var(--textarea-background-color);
}