/* Children's math quiz (Pages/Learn/Math.cshtml): big, touch-friendly controls; colours from the theme variables. */

.learn-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
    gap: .75rem;
}

.learn-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .25rem;
    padding: 1rem .5rem;
    border-width: 2px;
    border-radius: 1rem;
    font-weight: 600;
}

.learn-tile-sign {
    font-size: 2.5rem;
    line-height: 1;
}

.learn-choices {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.learn-choices .btn {
    min-width: 4.5rem;
    min-height: 3rem;
    border-radius: .75rem;
    font-weight: 600;
}

.learn-start {
    min-width: 12rem;
    min-height: 3.5rem;
    border-radius: 1rem;
    font-size: 1.4rem;
    font-weight: 700;
}

/* ------------------------------------------------------------------ quiz */

.learn-quiz {
    max-width: 30rem;
    margin: 0 auto;
}

.learn-status {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem;
    font-variant-numeric: tabular-nums;
    margin-bottom: .5rem;
}

.learn-progress {
    height: .6rem;
    border-radius: 1rem;
    margin-bottom: 1.5rem;
}

.learn-progress .progress-bar {
    transition: width .3s ease;
}

.learn-problem {
    text-align: center;
    font-size: clamp(2.5rem, 12vw, 4rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
    white-space: nowrap;
}

.learn-answer {
    display: inline-block;
    min-width: 2.2ch;
    padding: 0 .2em;
    border-bottom: .08em solid var(--app-primary);
    color: var(--app-primary-text);
}

.learn-answer-empty { color: var(--app-line); }
.learn-answer-ok { color: var(--app-correct); border-color: var(--app-correct); }
.learn-answer-bad { color: var(--bs-danger); border-color: var(--bs-danger); }

.learn-feedback {
    min-height: 2rem;
    margin: .75rem 0 1rem;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
}

.learn-feedback-ok { color: var(--app-correct); }
.learn-feedback-bad { color: var(--bs-danger); }

.learn-keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .6rem;
}

.learn-keypad .btn {
    min-height: 3.75rem;
    border-radius: 1rem;
    border-width: 2px;
    font-size: 1.6rem;
    font-weight: 700;
    touch-action: manipulation; /* no double-tap zoom on phones */
}

.learn-keypad .btn-success { font-size: 1.15rem; }

/* ------------------------------------------------------------------ summary */

.learn-summary { text-align: center; }

.learn-stars {
    font-size: 3.5rem;
    letter-spacing: .25rem;
    color: var(--app-border);
}

.learn-stars .on { color: #f4b400; }

.learn-results {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .75rem;
    margin: 1.25rem 0;
}

.learn-results > div {
    display: flex;
    flex-direction: column;
    gap: .15rem;
    padding: .75rem;
    border: 1px solid var(--app-border);
    border-radius: .75rem;
    background: var(--app-surface);
}

.learn-results span { font-size: .85rem; color: var(--bs-secondary-color); }
.learn-results strong { font-size: 1.4rem; font-variant-numeric: tabular-nums; }

.learn-record {
    min-height: 1.5rem;
    font-weight: 600;
    color: var(--app-correct);
}

.learn-mistakes {
    margin-top: 1rem;
    text-align: left;
    display: inline-block;
}

.learn-mistake {
    font-size: 1.15rem;
    font-variant-numeric: tabular-nums;
}

@media (prefers-reduced-motion: reduce) {
    .learn-progress .progress-bar { transition: none; }
}

/* ------------------------------------------------------------------ hub (Pages/Learn/Index) */

.learn-subjects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1rem;
}

.learn-subject {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    padding: 1.25rem;
    border: 2px solid var(--app-border);
    border-radius: 1rem;
    background: var(--app-surface);
    color: inherit;
    text-decoration: none;
}

.learn-subject:hover,
.learn-subject:focus-visible {
    border-color: var(--app-primary);
    color: inherit;
}

.learn-subject-icon {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--app-primary-text);
}

.learn-subject-name { font-size: 1.3rem; font-weight: 700; }
.learn-subject-text { color: var(--bs-secondary-color); }

/* ------------------------------------------------------------------ spelling quiz */

.learn-word { letter-spacing: .02em; }

.learn-gap {
    display: inline-block;
    min-width: 1.4ch;
    margin: 0 .05em;
    padding: 0 .1em;
    border-bottom: .08em solid var(--app-primary);
    color: var(--app-primary-text);
}

.learn-gap-ok { color: var(--app-correct); border-color: var(--app-correct); }
.learn-gap-bad { color: var(--bs-danger); border-color: var(--bs-danger); }

.learn-mistake .learn-gap { border-bottom-width: 2px; font-weight: 700; }

.learn-letters {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .75rem;
}

.learn-letters .btn {
    min-height: 4.5rem;
    border-radius: 1rem;
    border-width: 2px;
    font-size: 2.2rem;
    font-weight: 700;
    touch-action: manipulation;
}

/* ------------------------------------------------------------------ English flashcards */

.learn-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    width: 100%;
    min-height: 16rem;
    padding: 1.5rem 1rem;
    border: 2px solid var(--app-border);
    border-radius: 1.25rem;
    background: var(--app-surface);
    color: inherit;
    box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .06);
    transition: border-color .2s ease, transform .2s ease;
    touch-action: manipulation;
}

.learn-card:focus-visible { outline: 3px solid var(--app-primary); outline-offset: 3px; }
.learn-card-turned { border-color: var(--app-primary); }

.learn-card-emoji { font-size: 4.5rem; line-height: 1.1; }
.learn-card-word { font-size: clamp(1.8rem, 8vw, 2.6rem); font-weight: 700; }

.learn-card-back {
    font-size: clamp(1.8rem, 8vw, 2.6rem);
    font-weight: 700;
    color: var(--app-primary-text);
}

.learn-card-hint { font-size: .9rem; color: var(--bs-secondary-color); }

#fcGrade .btn { font-size: 1.4rem; }

@media (prefers-reduced-motion: no-preference) {
    .learn-card-turned { transform: scale(1.02); }
}

/* ------------------------------------------------------------------ landing pages /nauka/{slug} */

.learn-topic { max-width: 48rem; }
.learn-topic .lead { max-width: 65ch; }

.learn-tips { padding-left: 1.2rem; max-width: 65ch; }
.learn-tips li + li { margin-top: .35rem; }

.learn-topic-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
    gap: .35rem 1.5rem;
    padding-left: 1.2rem;
}

/* ------------------------------------------------------------------ memory game */

.learn-memory {
    max-width: 44rem;
    margin: 0 auto;
}

.learn-board {
    display: grid;
    grid-template-columns: repeat(var(--cols, 4), 1fr);
    gap: .6rem;
    margin-top: 1rem;
}

@media (max-width: 575.98px) {
    .learn-board { grid-template-columns: repeat(4, 1fr); gap: .45rem; }
}

.learn-card-mem {
    position: relative;
    aspect-ratio: 3 / 4;
    max-width: 100%;
    padding: 0;
    border: 2px solid var(--app-border);
    border-radius: .9rem;
    background: var(--app-surface);
    color: inherit;
    cursor: pointer;
    touch-action: manipulation;
    transition: transform .25s ease, border-color .2s ease, background-color .2s ease;
}

.learn-card-mem:focus-visible { outline: 3px solid var(--app-primary); outline-offset: 2px; }

.learn-card-mem .back,
.learn-card-mem .face {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: .25rem;
    text-align: center;
}

/* Back side: the theme's primary colour with a big question mark. */
.learn-card-mem .back {
    border-radius: calc(.9rem - 2px);
    background: var(--app-primary);
    color: var(--app-primary-fg);
    font-size: clamp(1.4rem, 5vw, 2.2rem);
    font-weight: 700;
}

.learn-card-mem .face { visibility: hidden; font-size: clamp(1.8rem, 7vw, 3rem); line-height: 1.1; }
.learn-card-mem .face.word { font-size: clamp(.85rem, 3.2vw, 1.25rem); font-weight: 700; overflow-wrap: anywhere; }

.learn-card-mem.up { transform: rotateY(0); border-color: var(--app-primary); }
.learn-card-mem.up .back { visibility: hidden; }
.learn-card-mem.up .face { visibility: visible; }

.learn-card-mem.found {
    border-color: var(--app-correct);
    background: var(--app-happy-bg);
    cursor: default;
}

@media (prefers-reduced-motion: no-preference) {
    .learn-card-mem.up { animation: learn-flip .25s ease; }
    @keyframes learn-flip { from { transform: rotateY(90deg); } to { transform: rotateY(0); } }
}

/* ------------------------------------------------------------------ geography quiz */

.learn-geo-question {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .6rem;
    margin: 1.5rem 0 .5rem;
    text-align: center;
}

.learn-geo-ask { font-size: 1.15rem; color: var(--bs-secondary-color); }

.learn-geo-prompt {
    font-size: clamp(1.6rem, 7vw, 2.4rem);
    font-weight: 700;
    line-height: 1.2;
    max-width: 40rem;
}

.learn-geo-prompt.learn-geo-long { font-size: clamp(1.15rem, 4.5vw, 1.5rem); font-weight: 600; }

.learn-flag {
    height: clamp(6rem, 28vw, 9rem);
    width: auto;
    max-width: 100%;
    border: 1px solid var(--app-border);
    border-radius: .35rem;
    box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .08);
}

.learn-flag-small {
    height: 1.4rem;
    width: auto;
    margin-right: .5rem;
    vertical-align: -.2rem;
    border: 1px solid var(--app-border);
}

.learn-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .75rem;
}

@media (max-width: 575.98px) {
    .learn-options { grid-template-columns: 1fr; }
}

.learn-options .btn {
    display: flex;
    align-items: center;
    gap: .75rem;
    min-height: 4rem;
    padding: .6rem 1rem;
    border-width: 2px;
    border-radius: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: left;
    touch-action: manipulation;
}

.learn-option-key {
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.8rem;
    height: 1.8rem;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: .9rem;
    opacity: .7;
}

.learn-geo-mistake { font-size: 1rem; }

/* Category search with suggestions (category-picker.js) */
.category-picker { position: relative; }

.category-picker-list {
    position: absolute;
    z-index: 1050;
    left: 0;
    right: 0;
    max-height: min(24rem, 60vh);
    margin: .25rem 0 0;
    overflow-y: auto;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    box-shadow: var(--bs-box-shadow);
}

.category-picker-item {
    padding: .45rem .75rem;
    cursor: pointer;
}

.category-picker-item.active,
.category-picker-item:hover { background: var(--bs-primary-bg-subtle); }

.category-picker-item[aria-selected="true"] .category-picker-name { font-weight: 600; }

.category-picker-empty { padding: .45rem .75rem; color: var(--bs-secondary-color); }