/**
 * MindExams Revision application layout.
 *
 * The application has five stable sections:
 * 1. Header
 * 2. Scrollable Question Panel
 * 3. Learning Panel inside the Question Panel
 * 4. Fixed Answer Panel
 * 5. Fixed Footer
 */

.mindexams-revision,
.mindexams-revision * {
    box-sizing: border-box;
}

.mindexams-revision {
    --mindexams-green: #35b49b;
    --mindexams-green-dark: #299d87;
    --mindexams-green-pale: #cce9e4;
    --mindexams-text: #18312d;
    --mindexams-muted-text: #73817f;
    --mindexams-focus: #145f91;

    --mindexams-correct: #218739;
    --mindexams-correct-border: #35a853;
    --mindexams-correct-background: #edfaef;

    --mindexams-incorrect: #9c2b2b;
    --mindexams-incorrect-border: #d63638;
    --mindexams-incorrect-background: #fcf0f1;

    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    color: var(--mindexams-text);
    font-family: Arial, Helvetica, sans-serif;
}

.mindexams-revision [hidden] {
    display: none !important;
}

/**
 * Accessible headings that remain available to screen readers.
 */
.mindexams-revision .screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/**
 * Loading area.
 */
.mindexams-revision__loading {
    padding: 32px 20px;
    border: 1px solid #dcdcde;
    background: #ffffff;
    text-align: center;
}

.mindexams-revision__loading p {
    margin: 0;
    font-size: 17px;
}

/**
 * User-facing messages.
 */
.mindexams-revision__messages {
    margin-bottom: 16px;
    padding: 16px;
    border: 1px solid #dba617;
    border-left-width: 5px;
    background: #fff8e5;
}

.mindexams-revision__messages p {
    margin: 0;
}

.mindexams-revision__retry-button {
    min-height: 40px;
    margin-top: 12px;
    padding: 8px 18px;
    border: 1px solid var(--mindexams-green);
    border-radius: 4px;
    background: var(--mindexams-green);
    color: #ffffff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.mindexams-revision__retry-button:hover:not(:disabled) {
    border-color: var(--mindexams-green-dark);
    background: var(--mindexams-green-dark);
}

/**
 * Main application.
 *
 * Header, Answer Panel and Footer remain fixed.
 * Only the Question Panel scrolls.
 */
.mindexams-revision__application {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto auto;
    width: 100%;
    height: 78vh;
    min-height: 600px;
    max-height: 820px;
    overflow: hidden;
    border: 1px solid #c3c4c7;
    border-radius: 8px;
    background: #ffffff;
}

/**
 * Fixed Header.
 */
.mindexams-revision__header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
    align-items: center;
    padding: 16px 22px;
    border-bottom: 1px solid #dcdcde;
    background: #f6f7f7;
}

.mindexams-revision__session-information {
    min-width: 0;
}

.mindexams-revision__session-name {
    margin: 0;
    color: var(--mindexams-text);
    font-size: 20px;
    font-weight: 700;
    line-height: 1.3;
    overflow-wrap: anywhere;
}

/**
 * Question and completed progress circles.
 */
.mindexams-revision__progress-information {
    display: flex;
    gap: 18px;
    align-items: center;
    justify-content: flex-end;
    min-width: 290px;
}

.mindexams-revision__progress-ring {
    --mindexams-progress-angle: 0deg;
    --mindexams-ring-size: 132px;
    --mindexams-ring-hole: 29px;

    position: relative;
    width: var(--mindexams-ring-size);
    height: var(--mindexams-ring-size);
    flex: 0 0 var(--mindexams-ring-size);
    border-radius: 50%;
    background:
        repeating-conic-gradient(
            from -90deg,
            transparent 0deg 15deg,
            #ffffff 15deg 18deg
        ),
        conic-gradient(
            from -90deg,
            var(--mindexams-green) 0deg var(--mindexams-progress-angle),
            var(--mindexams-green-pale) var(--mindexams-progress-angle) 360deg
        );
    box-shadow:
        0 4px 12px rgba(24, 49, 45, 0.12),
        inset 0 0 0 1px rgba(53, 180, 155, 0.12);
}

.mindexams-revision__progress-ring::before {
    content: "";
    position: absolute;
    inset: var(--mindexams-ring-hole);
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 0 0 1px rgba(24, 49, 45, 0.06);
}

.mindexams-revision__progress-ring-text {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: grid;
    place-content: center;
    text-align: center;
}

.mindexams-revision__progress-ring-label {
    display: block;
    margin-bottom: 6px;
    color: var(--mindexams-muted-text);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.7px;
    line-height: 1;
    text-transform: uppercase;
}

.mindexams-revision__progress-ring-value {
    display: block;
    color: var(--mindexams-text);
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
}

/**
 * Scrollable Question Panel.
 *
 * The Question statement, written answer options, optional image and
 * Learning Panel appear inside this panel.
 */
.mindexams-revision__question-panel {
    min-width: 0;
    min-height: 0;
    padding: 24px;
    overflow: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    background: #ffffff;
}

.mindexams-revision__question-panel:focus {
    outline: 3px solid var(--mindexams-focus);
    outline-offset: -3px;
}

.mindexams-revision__question-text {
    font-size: 18px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.mindexams-revision__question-text > :first-child {
    margin-top: 0;
}

.mindexams-revision__question-text > :last-child {
    margin-bottom: 0;
}

/**
 * Written answer options remain visible as part of the Question.
 */
.mindexams-revision__question-text ol[type="A"] {
    margin: 24px 0 0;
    padding-left: 38px;
    list-style-type: upper-alpha;
}

.mindexams-revision__question-text ol[type="A"] > li {
    margin: 0 0 10px;
    padding-left: 6px;
}

.mindexams-revision__question-text ol[type="A"] > li:last-child {
    margin-bottom: 0;
}

/**
 * Question tables.
 */
.mindexams-revision__question-text table {
    width: 100%;
    margin: 16px 0;
    border-collapse: collapse;
}

.mindexams-revision__question-text th,
.mindexams-revision__question-text td {
    padding: 8px;
    border: 1px solid #c3c4c7;
    text-align: left;
    vertical-align: top;
}

/**
 * Optional Question image.
 */
.mindexams-revision__question-image {
    margin: 20px 0 0;
    text-align: center;
}

.mindexams-revision__question-image img {
    display: block;
    max-width: 100%;
    max-height: 300px;
    margin: 0 auto;
    object-fit: contain;
}

/**
 * Learning Panel.
 */
.mindexams-revision__learning-panel {
    margin: 24px 0 0;
    padding: 18px 20px;
    border: 1px solid #c3c4c7;
    border-left-width: 6px;
    border-radius: 6px;
    background: #f6f7f7;
}

.mindexams-revision__learning-panel.is-correct {
    border-color: var(--mindexams-correct-border);
    background: var(--mindexams-correct-background);
}

.mindexams-revision__learning-panel.is-incorrect {
    border-color: var(--mindexams-incorrect-border);
    background: var(--mindexams-incorrect-background);
}

.mindexams-revision__learning-heading {
    position: relative;
    margin: 0 0 16px;
    padding-left: 34px;
    color: var(--mindexams-text);
    font-size: 22px;
    font-weight: 700;
    line-height: 1.3;
}

.mindexams-revision__learning-heading::before {
    content: "";
    position: absolute;
    top: 1px;
    left: 0;
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    border: 2px solid currentColor;
    border-radius: 50%;
    font-size: 16px;
    font-weight: 700;
    line-height: 1;
}

.mindexams-revision__learning-panel.is-correct
.mindexams-revision__learning-heading {
    color: var(--mindexams-correct);
}

.mindexams-revision__learning-panel.is-correct
.mindexams-revision__learning-heading::before {
    content: "✓";
}

.mindexams-revision__learning-panel.is-incorrect
.mindexams-revision__learning-heading {
    color: var(--mindexams-incorrect);
}

.mindexams-revision__learning-panel.is-incorrect
.mindexams-revision__learning-heading::before {
    content: "×";
}

.mindexams-revision__learning-heading:focus {
    outline: 3px solid var(--mindexams-focus);
    outline-offset: 3px;
}

.mindexams-revision__learning-answer-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.mindexams-revision__learning-answer-row {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    min-width: 0;
    padding: 12px 14px;
    border: 1px solid rgba(24, 49, 45, 0.14);
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.75);
}

.mindexams-revision__learning-answer-label {
    color: var(--mindexams-muted-text);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.3;
}

.mindexams-revision__learning-answer-value {
    display: inline-grid;
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
    place-items: center;
    border: 2px solid var(--mindexams-green);
    border-radius: 50%;
    background: #ffffff;
    color: var(--mindexams-text);
    font-size: 19px;
    font-weight: 700;
    line-height: 1;
}

.mindexams-revision__learning-explanation {
    padding-top: 16px;
    border-top: 1px solid rgba(24, 49, 45, 0.16);
}

.mindexams-revision__learning-explanation-heading {
    margin: 0 0 8px;
    color: var(--mindexams-text);
    font-size: 16px;
    font-weight: 700;
    line-height: 1.3;
}

.mindexams-revision__learning-explanation p {
    margin: 0;
    color: var(--mindexams-text);
    font-size: 16px;
    line-height: 1.6;
    overflow-wrap: anywhere;
}

/**
 * Fixed A-D Answer Panel.
 */
.mindexams-revision__options-panel {
    padding: 12px 22px;
    border-top: 1px solid #dcdcde;
    background: #f6f7f7;
}

.mindexams-revision__options-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
}

/**
 * Four selectable buttons containing only A, B, C and D.
 */
.mindexams-revision__options-list > button,
.mindexams-revision__option {
    width: 100%;
    min-height: 40px;
    padding: 7px;
    border: 2px solid #8c8f94;
    border-radius: 6px;
    background: #ffffff;
    color: #1d2327;
    font: inherit;
    font-size: 20px;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    cursor: pointer;
}

.mindexams-revision__options-list > button:hover:not(:disabled),
.mindexams-revision__option:hover:not(:disabled) {
    border-color: #2271b1;
    background: #f0f6fc;
}

/**
 * Selected A-D answer.
 */
.mindexams-revision__options-list > button[aria-checked="true"],
.mindexams-revision__option[aria-checked="true"],
.mindexams-revision__option.is-selected {
    border-color: #a61b1b;
    background: #dff0ff;
    color: #1d2327;
    box-shadow: inset 0 0 0 2px #a61b1b;
}

/**
 * Visible keyboard focus.
 */
.mindexams-revision__options-list > button:focus-visible,
.mindexams-revision__option:focus-visible,
.mindexams-revision__button:focus-visible,
.mindexams-revision__retry-button:focus-visible,
.mindexams-revision__completion-actions a:focus-visible,
.mindexams-revision__completion-actions button:focus-visible {
    outline: 3px solid var(--mindexams-focus);
    outline-offset: 3px;
}

/**
 * Fixed Footer.
 *
 * Revision shows only the controls that are currently available.
 */
.mindexams-revision__footer {
    display: grid;
    grid-template-columns: repeat(3, minmax(150px, 210px));
    gap: 12px;
    justify-content: center;
    padding: 12px 22px 16px;
    border-top: 1px solid #c3c4c7;
    background: #ffffff;
}

.mindexams-revision__button {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    width: 100%;
    min-height: 44px;
    padding: 0;
    overflow: hidden;
    border: 0;
    border-radius: 0 16px 0 16px;
    background: transparent;
    color: inherit;
    box-shadow: 0 5px 0 rgba(0, 0, 0, 0.12);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    line-height: 1.2;
    text-transform: uppercase;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease;
}

.mindexams-revision__button-icon {
    display: grid;
    min-width: 42px;
    place-items: center;
    border-radius: 0 0 0 16px;
    background: #ffffff;
    color: var(--mindexams-green);
}

.mindexams-revision__button-label {
    display: grid;
    min-width: 0;
    padding: 6px 10px;
    place-items: center;
    border-radius: 0 16px 0 0;
    background: var(--mindexams-green);
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.3px;
    overflow-wrap: anywhere;
    text-align: center;
}

.mindexams-revision__button svg {
    width: 23px;
    height: 23px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.mindexams-revision__button:hover:not(:disabled)
.mindexams-revision__button-label {
    background: var(--mindexams-green-dark);
}

.mindexams-revision__button:hover:not(:disabled)
.mindexams-revision__button-icon {
    color: var(--mindexams-green-dark);
}

.mindexams-revision__button:active:not(:disabled) {
    transform: translateY(3px);
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.12);
}

.mindexams-revision__button:disabled {
    box-shadow: none;
    cursor: not-allowed;
}

.mindexams-revision__button:disabled
.mindexams-revision__button-icon {
    background: #f3f5f5;
    color: #b7cbc6;
}

.mindexams-revision__button:disabled
.mindexams-revision__button-label {
    background: #bedbd4;
    color: #eef4f2;
}

.mindexams-revision__retry-button:disabled,
.mindexams-revision__options-list > button:disabled,
.mindexams-revision__option:disabled {
    border-color: #a7aaad;
    background: #dcdcde;
    color: #646970;
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.65;
}

/**
 * Keep the locked selected answer visibly selected while the Learning Panel
 * is displayed.
 */
.mindexams-revision__options-list > button[aria-checked="true"]:disabled,
.mindexams-revision__option[aria-checked="true"]:disabled,
.mindexams-revision__option.is-selected:disabled {
    border-color: #a61b1b;
    background: #dff0ff;
    color: #1d2327;
    box-shadow: inset 0 0 0 2px #a61b1b;
    opacity: 1;
}

/**
 * Completion area.
 */
.mindexams-revision__completion {
    padding: 28px 22px;
    border: 1px solid var(--mindexams-green);
    border-left-width: 5px;
    background: #edfaef;
    text-align: center;
}

.mindexams-revision__completion h2 {
    margin: 0 0 12px;
}

.mindexams-revision__completion h2:focus {
    outline: 3px solid var(--mindexams-focus);
    outline-offset: 3px;
}

.mindexams-revision__completion p {
    margin: 0;
    line-height: 1.5;
}

.mindexams-revision__completion-actions {
    margin-top: 18px;
}

.mindexams-revision__completion-actions a,
.mindexams-revision__completion-actions button {
    display: inline-block;
    min-height: 42px;
    padding: 10px 20px;
    border: 1px solid var(--mindexams-green);
    border-radius: 4px;
    background: var(--mindexams-green);
    color: #ffffff;
    font: inherit;
    font-weight: 700;
    line-height: 1.3;
    text-decoration: none;
    cursor: pointer;
}

.mindexams-revision__completion-actions a:hover,
.mindexams-revision__completion-actions button:hover {
    border-color: var(--mindexams-green-dark);
    background: var(--mindexams-green-dark);
    color: #ffffff;
}

/**
 * Tablet and mobile layout.
 */
@media screen and (max-width: 720px) {
    .mindexams-revision__application {
        height: calc(100vh - 24px);
        min-height: 520px;
        max-height: none;
        border-radius: 0;
    }

    .mindexams-revision__header {
        grid-template-columns: 1fr;
        gap: 12px;
        justify-items: center;
        padding: 12px 16px;
        text-align: center;
    }

    .mindexams-revision__session-name {
        font-size: 21px;
    }

    .mindexams-revision__progress-information {
        min-width: 0;
        gap: 14px;
        justify-content: center;
    }

    .mindexams-revision__progress-ring {
        --mindexams-ring-size: 108px;
        --mindexams-ring-hole: 24px;
    }

    .mindexams-revision__progress-ring-label {
        margin-bottom: 4px;
        font-size: 9px;
    }

    .mindexams-revision__progress-ring-value {
        font-size: 20px;
    }

    .mindexams-revision__question-panel {
        padding: 18px 16px;
    }

    .mindexams-revision__question-text {
        font-size: 16px;
    }

    .mindexams-revision__question-text ol[type="A"] {
        padding-left: 32px;
    }

    .mindexams-revision__learning-panel {
        padding: 16px;
    }

    .mindexams-revision__learning-heading {
        font-size: 20px;
    }

    .mindexams-revision__learning-answer-summary {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .mindexams-revision__options-panel {
        padding: 10px 16px;
    }

    .mindexams-revision__options-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .mindexams-revision__options-list > button,
    .mindexams-revision__option {
        min-height: 38px;
        font-size: 17px;
    }

    .mindexams-revision__footer {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px 10px;
        padding: 10px 16px 13px;
    }

    .mindexams-revision__button {
        grid-template-columns: 40px minmax(0, 1fr);
        min-height: 42px;
        border-radius: 0 15px 0 15px;
    }

    .mindexams-revision__button-icon {
        min-width: 40px;
        border-radius: 0 0 0 15px;
    }

    .mindexams-revision__button-label {
        border-radius: 0 15px 0 0;
        font-size: 13px;
    }

    .mindexams-revision__button svg {
        width: 21px;
        height: 21px;
    }
}

/**
 * Compact mobile screens.
 */
@media screen and (max-width: 420px) {
    .mindexams-revision__application {
        min-height: 480px;
    }

    .mindexams-revision__header {
        padding: 10px 12px;
    }

    .mindexams-revision__session-name {
        font-size: 18px;
    }

    .mindexams-revision__progress-information {
        gap: 10px;
    }

    .mindexams-revision__progress-ring {
        --mindexams-ring-size: 92px;
        --mindexams-ring-hole: 21px;
    }

    .mindexams-revision__progress-ring-label {
        margin-bottom: 3px;
        font-size: 8px;
        letter-spacing: 0.4px;
    }

    .mindexams-revision__progress-ring-value {
        font-size: 17px;
    }

    .mindexams-revision__question-panel {
        padding: 14px 12px;
    }

    .mindexams-revision__learning-panel {
        margin-top: 18px;
        padding: 14px 12px;
    }

    .mindexams-revision__learning-heading {
        padding-left: 31px;
        font-size: 18px;
    }

    .mindexams-revision__learning-heading::before {
        width: 23px;
        height: 23px;
        font-size: 14px;
    }

    .mindexams-revision__learning-answer-row {
        padding: 10px 12px;
    }

    .mindexams-revision__learning-answer-label {
        font-size: 13px;
    }

    .mindexams-revision__learning-answer-value {
        width: 34px;
        height: 34px;
        flex-basis: 34px;
        font-size: 17px;
    }

    .mindexams-revision__learning-explanation p {
        font-size: 15px;
    }

    .mindexams-revision__options-panel {
        padding: 8px 12px;
    }

    .mindexams-revision__options-list > button,
    .mindexams-revision__option {
        min-height: 36px;
        font-size: 16px;
    }

    .mindexams-revision__footer {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 8px 12px 11px;
    }

    .mindexams-revision__button {
        grid-template-columns: 42px minmax(0, 1fr);
        min-height: 46px;
        border-radius: 0 15px 0 15px;
    }

    .mindexams-revision__button-icon {
        min-width: 42px;
        border-radius: 0 0 0 15px;
    }

    .mindexams-revision__button-label {
        padding: 6px 7px;
        border-radius: 0 15px 0 0;
        font-size: 11px;
        letter-spacing: 0.1px;
    }

    .mindexams-revision__button svg {
        width: 22px;
        height: 22px;
    }
}