:root {
    --lightYellow: #f8e187;
    --hover-color: transparent;
    --img-max-width: 500px;
    --img-max-height: 300px;
}

#exercise {
    touch-action: manipulation;
    max-width: 900px;
}

#playGround {
    margin-top: 40px;
    text-align: left;

    display: grid;
    gap: 10px;
    justify-content: center;
}

#playGround.content-image {
    grid-template-columns: minmax(0, min-content);
}
#playGround.content-code64 {
    grid-template-columns: minmax(0, min-content);
}
#playGround.content-text {
    grid-template-columns: 100%;
}

#question-frame {
    background-color: white;
    border-radius: 3px;

    font-size: 24px;
    line-height: 1.5;

    cursor: crosshair;

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

.finished #question-frame {
    cursor: pointer;
}

#question-content {
    max-width: 100%;
    margin: 30px;
}

#question-content:not(:last-child) {
    margin-bottom: 10px;
}

#question-content, #question-content * {
    user-select: none;
}

.control-panel {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;

    gap: 5px;
}

#item-input {
    font-family: monospace;
    line-height: 1.3;
}

@media screen and (max-width: 599px) {
    #question-frame {
        padding-left: 10px;
        padding-right: 10px;
    }
}

#exercise .statsBox {
    text-align: center;
}

#zero-areas-message .message {
    margin: 0; /* override content.css */
}

/*********************** EXPLANATION and INSTRUCTIONS ***********************/
#instructions {
    margin: 10px 0;
}
#explanation, #instructions {
    background-color: white;
    border-radius: 3px;
    font-size: 18px;
    line-height: 1.3;
}
.content-text #instructions {
    width: max-content;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

#instructions-content, #explanation-content {
    margin: 15px;
}

#area-stats {
    margin: 10px;
    padding: 2px 5px;
    border-radius: 5px;
    background-color: var(--lightGray);
    font-size: 16px;
}

#area-stats.error {
    animation: stats-error 500ms 2;
}

@keyframes stats-error {
    0%, 100% { background-color: var(--lightGray); }
    50% { background-color: var(--faintRed); }
}


/*********************** WHITE SCREEN ***********************/
.whiteScreen #question-content {
    margin: 10px;
}

.whiteScreen #instructions {
    margin: 0;
}
.whiteScreen #explanation {
    padding: 0;
}

.whiteScreen #zero-areas-message {
    padding: 0 10px;
}


/*********************** AREAS ***********************/
:root {
    --area-box-shadow: inset 0 0 0 2px;
}

/*********************** AREAS TEXT ***********************/
.content-text .selectable-area {
    white-space: break-spaces;
}

.content-text .selectable-area .content {
    padding: 2px;
    border-radius: 3px;
    position: relative;
}

@media screen and (hover: hover) {
    .content-text:not(.finished) .selectable-area:not(.selected):not(.correct):not(.wrong-missed):not(.wrong-selected):hover {
        background-color: var(--hover-color);
    }
}
.content-text .selectable-area.selected .content {
    background-color: var(--lightYellow);
}
.content-text .selectable-area.correct .content {
    background-color: var(--lightYellow);
    box-shadow: var(--area-box-shadow) var(--greenHover);
}
.content-text .selectable-area.wrong-missed .content {
    box-shadow: var(--area-box-shadow) var(--blueHover);
}

.content-text .selectable-area.wrong-selected .content {
    background-color: var(--lightYellow);
}

.content-text .selectable-area .anchor {
    position: relative;
}

.content-text .selectable-area.correct .anchor::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/correct.svg"); /* preloaded */
    background-color: var(--greenHover);
}
.content-text .selectable-area.wrong-selected .anchor::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/stop.svg"); /* preloaded */
    background-color: var(--orangeHover);
}
.content-text .selectable-area.wrong-missed .anchor::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/missing.svg"); /* preloaded */
    background-color: var(--blueHover);
}
.content-text .selectable-area .anchor::after {
    --size: .5em;
    position: absolute;
    z-index: 1;

    right: 0;
    top: 0;
    transform: translate(50%, -50%);

    width: var(--size);
    height: var(--size);
    padding: 3px;
    border-radius: 3px;

    background-size: var(--size) var(--size);
    background-repeat: no-repeat;
    background-position: center;
}

.content-text .selectable-area .replacement {
    font-weight: 700;
}
.content-text .selectable-area .removal {
    font-weight: 700;
    text-decoration: line-through 2px;
}

.content-text .selectable-area .comma {
    visibility: hidden;
}
.content-text .selectable-area.selected .comma {
    visibility: visible;
}

.content-text .selectable-area.spacer.selected .content {
    padding-left: 6px;
    padding-right: 8px;
}

.content-text .selectable-area.spacer:not(.selected) .content {
    margin-left: 4px;
    margin-right: 6px;
}

/*********************** AREAS CODE ***********************/
code {
    padding: 0 !important; /* overwrite prism */
}

code .selectable-area {
    padding: 0 1em; /* overwrite prism */

    border-radius: 3px;
    width: 100%;
    display: inline-block;
    position: relative;
}
@media screen and (hover: hover) {
    .content-code64:not(.finished) code .selectable-area:not(.selected):not(.correct):not(.wrong-missed):not(.wrong-selected):hover {
        background-color: var(--hover-color);
    }
}
code .selectable-area.selected {
    background-color: var(--lightYellow);
}
code .selectable-area.correct {
    background-color: var(--lightYellow);
    box-shadow: var(--area-box-shadow) var(--greenHover);
}
code .selectable-area.wrong-selected {
    background-color: var(--lightYellow);
}
code .selectable-area.wrong-missed {
    box-shadow: var(--area-box-shadow) var(--blueHover);
}

code .selectable-area::after {
    --size: 1em;
    position: absolute;
    width: var(--size);
    height: 100%;
    right: 5px;

    background-position: center;
    background-size: var(--size) var(--size);
    background-repeat: no-repeat;
}
code .selectable-area.correct::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/correct-green.svg"); /* preloaded */
}
code .selectable-area.wrong-selected::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/stop-orange.svg"); /* preloaded */
}
code .selectable-area.wrong-missed::after {
    content: '';
    background-image: url("https://umimeto.org/asset/global/img/missing-blue.svg"); /* preloaded */
}

/*********************** AREAS SVG ***********************/

.image-container {
    max-width: 100%;
    max-height: 100%;
}

.image-container > svg {
    width: 100%;
    height: 100%;
    --area-border-width: 2px;
}

svg .selectable-area {
    fill: transparent;
    opacity: 1;
    fill-opacity: .3;

    stroke: transparent;
    stroke-opacity: 0;
    stroke-width: var(--area-border-width);
}
svg .selectable-area.area-border {
    stroke-opacity: 1;
}
@media screen and (hover: hover) {
    .content-image:not(.finished) svg .selectable-area:not(.selected):not(.correct):not(.wrong-selected):not(.wrong-missed):hover {
        fill: var(--hover-color);
    }
}
svg .selectable-area.selected {
    fill: var(--yellow);
    stroke: var(--yellowHover)
}
svg .selectable-area.correct {
    fill: var(--green);
    stroke: var(--greenHover)
}
svg .selectable-area.wrong-selected {
    fill: var(--orange);
    stroke: var(--orangeHover)
}
svg .selectable-area.wrong-missed {
    fill: var(--blue);
    stroke: var(--blueHover)
}