:root {
    font-family:
            Inter,
            system-ui,
            -apple-system,
            BlinkMacSystemFont,
            "Segoe UI",
            sans-serif;

    color: #1d2733;
    background: #f3f5f7;
    line-height: 1.5;
}

* {
    box-sizing: border-box;
}

body {
    min-width: 320px;
    margin: 0;
}

button,
input {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.page {
    width: min(100% - 2rem, 1000px);
    margin: 0 auto;
    padding: 2rem 0 4rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    margin-top: 0;
    color: #52606d;
}

.panel,
.quiz-card {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: #ffffff;
    border: 1px solid #d9e0e7;
    border-radius: 14px;
    box-shadow: 0 4px 16px rgb(24 39 55 / 8%);
}

.panel h2 {
    margin-top: 0;
}

.selection-list {
    display: grid;
    gap: 0.75rem;
}

.deck-option,
.radio-option {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    cursor: pointer;
}

.deck-option input,
.radio-option input,
.card-option input {
    width: 1.15rem;
    height: 1.15rem;
    accent-color: #1769aa;
}

.order-selection {
    display: grid;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
    border: 0;
}

.card-grid {
    display: grid;
    grid-template-columns:
    repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.deck-card-group {
    display: contents;
}

.deck-card-heading {
    grid-column: 1 / -1;
    margin: 1rem 0 0;
}

.card-option {
    position: relative;
    display: grid;
    grid-template-rows: 150px auto;
    gap: 0.75rem;
    padding: 0.75rem;
    background: #ffffff;
    border: 2px solid #d9e0e7;
    border-radius: 10px;
    cursor: pointer;
}

.card-option:has(input:checked) {
    border-color: #1769aa;
    background: #f2f8fd;
}

.card-option input {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
}

.card-option img {
    width: 100%;
    height: 150px;
    object-fit: contain;
}

.card-option span {
    font-weight: 600;
    text-align: center;
}

.quiz-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
}

.quiz-summary p {
    margin: 0;
}

.primary-button,
.secondary-button {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
}

.primary-button {
    color: #ffffff;
    background: #1769aa;
    border: 1px solid #1769aa;
}

.primary-button:hover {
    background: #10598f;
}

.primary-button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.secondary-button {
    color: #1769aa;
    background: #ffffff;
    border: 1px solid #1769aa;
}

.error-message {
    width: 100%;
    color: #b42318;
}

.quiz-page {
    width: min(100% - 2rem, 700px);
}

.quiz-card {
    text-align: center;
}

.quiz-header {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.progress {
    margin: 0;
    color: #52606d;
}

.text-link {
    color: #1769aa;
}

/*
 * Der Bildbereich ist dauerhaft kompakt.
 */
.quiz-image-container {
    display: grid;
    min-height: 120px;
    place-items: center;
}

/*
 * Das Kartenbild besitzt dauerhaft 25 Prozent
 * der verfügbaren Breite.
 */
.quiz-image {
    display: block;
    width: 25%;
    max-width: 125px;
    max-height: 100px;
    object-fit: contain;
}

.card-solution {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid #d9e0e7;
    text-align: left;
}

.card-solution h1 {
    margin: 0 0 0.75rem;
    text-align: center;
}

.attribute-list {
    display: grid;
    gap: 0.75rem;
    margin: 0;
}

.attribute-list div {
    padding: 0.75rem;
    background: #f3f5f7;
    border-radius: 8px;
}

.attribute-list dt {
    font-weight: 700;
}

.attribute-list dd {
    margin: 0.25rem 0 0;
}

.quiz-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.finished-card {
    padding: 3rem 1.5rem;
}

[hidden] {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 550px) {
    .page {
        width: min(100% - 1rem, 1000px);
        padding-top: 0.5rem;
    }

    .panel,
    .quiz-card {
        padding: 1rem;
    }

    .quiz-header {
        align-items: flex-start;
    }

    .quiz-image-container {
        min-height: 90px;
    }

    .quiz-image {
        width: 25%;
        max-width: 100px;
        max-height: 80px;
    }
}