style.css

:root {
    --red: #b23535;
    --green: #38ad5f;
    --blue: #464ca5;
    --white: #eeeade;
    --black: #282828;


    --text-color: var(--black);
    --background-color: var(--white);
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-color: var(--white);
        --background-color: var(--black);
    }
}

* {
    color: inherit;
    background-color: inherit;
    border-color: inherit;
    font-family: inherit;
    box-sizing: inherit;
}

body {
    min-height: 100vh;
    font-family: Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    border-color: var(--text-color);
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

/* -------------------------------------------------------------------------- */
/*                                   Config                                   */
/* -------------------------------------------------------------------------- */

#config-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

fieldset {
    margin-bottom: 20px;
}

legend {
    font-weight: bold;
    margin-bottom: 10px;
}

.controller-type-div,
.synthesizer-type-div,
.channel-midi-config-div,
#transporter-type-div {
    margin-bottom: 10px;
}

label {
    user-select: none;
}

input[type="radio"]:disabled+label {
    text-decoration: line-through;
}

button {
    color: var(--text-color);
    background-color: var(--background-color);
    border: 1px solid var(--text-color);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

/* -------------------------------------------------------------------------- */
/*                               Part Container                               */
/* -------------------------------------------------------------------------- */

#part-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: start;
}


/* -------------------------------------------------------------------------- */
/*                                    Part                                    */
/* -------------------------------------------------------------------------- */

.part {
    text-align: center;
    border: 1px solid;
    min-width: 20%;
}

/* -------------------------------------------------------------------------- */
/*                                 Controller                                 */
/* -------------------------------------------------------------------------- */

.controller {
    /* display: flex; */
    /* flex-direction: column; */
    /* align-items: center; */

    padding-top: 0;

    border: 1px solid;
}


/* -------------------------------------------------------------------------- */
/*                               Component Title                              */
/* -------------------------------------------------------------------------- */

.component-title {
    margin-top: 0;
    margin-bottom: 0;
    width: 100%;
    height: 3rem;
    line-height: 3rem;
    cursor: pointer;
    user-select: none;
}

/* -------------------------------------------------------------------------- */
/*                               Controller Row                               */
/* -------------------------------------------------------------------------- */

.controller-row {
    border-top: 1px solid;
    justify-content: center;
    align-items: center;
    overflow-y: scroll;
    height: 40vw;
}

/* -------------------------------------------------------------------------- */
/*                              Controller Module                             */
/* -------------------------------------------------------------------------- */

.controller-module {
    padding: 1em;

    display: flex;
    flex-direction: column;
    align-items: center;

    border: 1px solid;
    font-size: 1vw;
}

.lcd {
    padding: 0.5em 1em;
    /* border: 0px solid; */
    border-radius: 5px;

    width: 16ch;
    min-height: 4em;
    line-height: 1.5;

    text-align: left;

    font-family: 'hd44780', monospace;

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

input[type="range"] {
    margin-top: 1em;
    width: 100%;
}

/* -------------------------------------------------------------------------- */
/*                                 Synthesizer                                */
/* -------------------------------------------------------------------------- */

.synthesizer {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;

    border: 1px solid;
}

/* -------------------------------------------------------------------------- */
/*                               Synthesizer Row                              */
/* -------------------------------------------------------------------------- */

.synthesizer-row {
    width: 100%;
}

/* -------------------------------------------------------------------------- */
/*                                 Message Row                                */
/* -------------------------------------------------------------------------- */

.message-row {
    width: 100%;
    height: 10vw;
    overflow-y: scroll;
}

/* -------------------------------------------------------------------------- */
/*                            Synthesizer Messages                            */
/* -------------------------------------------------------------------------- */

.note-on {
    color: var(--green);
}

.note-off {
    color: var(--red);
}

.all-notes-off {
    color: var(--blue);
}

/* -------------------------------------------------------------------------- */
/*                                 Transporter                                */
/* -------------------------------------------------------------------------- */

#transporter {
    position: fixed;
    width: 100vw;
    bottom: 0;

    padding-top: 1em;
    padding-bottom: 1em;
    text-align: center;

    border-top: 1px solid;
}

/* .transporter-row {
    display: flex;
    justify-content: center;
    align-items: center;
} */

/* #error-indicator {
    background-color: red;
    color: var(--text-color);
    font-size: xx-large;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    margin-left: 2rem;
} */

/* #error-indicator.hidden {
    background-color: var(--background-color);
    color: var(--background-color);
} */

.transporter-button {
    width: 2em;
    height: 2em;

    border: 1.5px solid;
    border-radius: 100%;
    font-size: 2.5rem;

    padding: 1rem;
    /* align-items: center; */
    margin: 0 0.5rem 2rem 0.5rem;

    cursor: pointer;

    color: var(--background-color);
    background-color: var(--text-color);

    transition: transform 0.2s;
}

.transporter-button:hover:enabled {
    transform: scale(1.1);
}

.transporter-button:disabled {
    color: var(--text-color);
    background-color: var(--background-color);

    cursor: auto;
}

.hidden {
    display: none;
}