/* Quizyy Kid Mode — K-2 student experience */

.kid-mode {
    --kid-font-display: 'Fredoka', system-ui, sans-serif;
    --kid-font-body: 'Nunito', system-ui, sans-serif;
    --kid-text-question: 1.75rem;
    --kid-text-option: 1.25rem;
    --kid-text-body: 1.125rem;
    --kid-touch-min: 48px;
    --kid-radius: 16px;
    --kid-radius-sm: 12px;
    --kid-option-gap: 12px;
    --kid-bg: #F0F9FF;
    --kid-surface: #FFFFFF;
    --kid-primary: #4A90D9;
    --kid-primary-light: #E3F2FD;
    --kid-success: #7CB342;
    --kid-warning: #F5A623;
    --kid-error: #E57373;
    --kid-star: #FFD54F;
    --kid-border: #4A90D9;
    --kid-text: #2c3e50;
    --kid-text-muted: #6c757d;
    --kid-shadow: 0 4px 16px rgba(74, 144, 217, 0.12);
    --kid-progress-bg: #e9ecef;
}

[data-theme="dark"] .kid-mode {
    --kid-bg: #1A2332;
    --kid-surface: #243447;
    --kid-primary: #6BB3FF;
    --kid-primary-light: #1E3A5F;
    --kid-border: #6BB3FF;
    --kid-text: #E8EDF3;
    --kid-text-muted: #9EAAB8;
    --kid-progress-bg: #344557;
    --kid-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.kid-mode {
    font-family: var(--kid-font-body);
    background-color: var(--kid-bg);
    overflow-x: hidden;
}

.kid-mode h1, .kid-mode h2, .kid-mode h3, .kid-mode .kid-heading {
    font-family: var(--kid-font-display);
}

/* Exam shell */
.exam-focus-body {
    overflow-x: hidden;
    min-height: 100dvh;
    background: var(--kid-bg);
}

.exam-focus-main {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 12px 100px;
}

.exam-focus-stack {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.exam-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--kid-surface);
    border-bottom: 2px solid var(--kid-border);
    position: sticky;
    top: 0;
    z-index: 200;
    box-shadow: var(--kid-shadow);
}

.exam-top-bar .exam-logo {
    height: 36px;
    width: 36px;
}

.exam-exit-btn {
    min-height: var(--kid-touch-min);
    min-width: var(--kid-touch-min);
    font-family: var(--kid-font-body);
    font-weight: 600;
}

/* Timer */
.kid-timer-card {
    background: var(--kid-primary);
    border: none;
    border-radius: var(--kid-radius-sm);
    color: #fff;
    margin-bottom: 12px;
}

.kid-timer-card.timer-warning { background: #ffc107; }
.kid-timer-card.timer-urgent { background: #ff9800; animation: kid-pulse 1s infinite; }

.kid-timer-label { font-size: 0.9rem; font-weight: 600; }
.kid-timer-display {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

/* Progress */
.kid-progress-card {
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius-sm);
    background: var(--kid-surface);
    margin-bottom: 12px;
    padding: 12px 16px;
}

.kid-progress-label { color: var(--kid-primary); font-weight: 600; font-size: 0.95rem; }
.kid-progress-bar-wrap {
    height: 20px;
    border-radius: 10px;
    background: var(--kid-progress-bg);
    overflow: hidden;
}

.kid-progress-bar {
    height: 100%;
    background: var(--kid-primary);
    border-radius: 10px;
    transition: width 0.3s ease;
}

.kid-progress-bar.kid-progress-animated {
    background-image: linear-gradient(45deg, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
    animation: kid-progress-stripe 1s linear infinite;
}

@keyframes kid-progress-stripe {
    from { background-position: 1rem 0; }
    to { background-position: 0 0; }
}

/* Question card */
.kid-question-card {
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius);
    background: var(--kid-surface);
    box-shadow: var(--kid-shadow);
    margin-bottom: 12px;
}

.kid-question-card.kid-slide-in {
    animation: kid-slide-in 0.2s ease-out;
}

@keyframes kid-slide-in {
    from { opacity: 0; transform: translateX(12px); }
    to { opacity: 1; transform: translateX(0); }
}

.kid-question-badge {
    font-size: 0.9rem;
    padding: 6px 14px;
    border-radius: 8px;
    background: var(--kid-primary);
    color: #fff;
    font-weight: 600;
}

.kid-question-text {
    font-family: var(--kid-font-display);
    font-size: var(--kid-text-question);
    font-weight: 600;
    color: var(--kid-text);
    line-height: 1.35;
    margin-bottom: 1rem;
}

.kid-question-image {
    max-height: 200px;
    border-radius: var(--kid-radius-sm);
    margin-bottom: 12px;
}

/* Option tiles */
.kid-option-group {
    display: flex;
    flex-direction: column;
    gap: var(--kid-option-gap);
}

.kid-option-tile {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 56px;
    padding: 12px 16px;
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius-sm);
    background: var(--kid-surface);
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
    font-size: var(--kid-text-option);
    font-weight: 600;
    color: var(--kid-text);
}

.kid-option-tile:hover {
    background: var(--kid-primary-light);
    transform: scale(1.01);
}

.kid-option-tile:active {
    transform: scale(0.98);
}

.kid-option-tile.is-selected {
    border-color: var(--kid-success);
    background: rgba(124, 179, 66, 0.12);
}

.kid-option-tile.is-selected .kid-option-check {
    opacity: 1;
    transform: scale(1);
}

.kid-option-tile input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.kid-option-letter {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--kid-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.kid-option-check {
    margin-left: auto;
    color: var(--kid-success);
    font-size: 1.5rem;
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.2s ease;
}

.kid-option-tile.is-selected .kid-option-letter {
    background: var(--kid-success);
}

/* Picture choice grid */
.kid-picture-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--kid-option-gap);
}

@media (min-width: 576px) {
    .kid-picture-grid { grid-template-columns: 1fr 1fr; }
}

.kid-picture-tile {
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    background: var(--kid-surface);
    min-height: 140px;
    transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.kid-picture-tile:hover { background: var(--kid-primary-light); }
.kid-picture-tile.is-selected {
    border-color: var(--kid-success);
    box-shadow: 0 0 0 3px rgba(124, 179, 66, 0.3);
}

.kid-picture-tile img {
    min-height: 0;
    max-height: 160px;
    object-fit: contain;
    border-radius: 8px;
    width: auto;
    max-width: 100%;
}

.kid-picture-tile input[type="radio"] { position: absolute; opacity: 0; }

.kid-picture-tile-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    overflow: visible;
}

.kid-picture-letter {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--kid-primary);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.kid-picture-check {
    position: absolute;
    top: 8px;
    right: 8px;
    color: var(--kid-success);
    font-size: 1.25rem;
}

.kid-picture-tile-visual img {
    min-height: 0;
    max-height: 120px;
    width: auto;
    max-width: 85%;
    object-fit: contain;
}

/* Shapes & colors: square tiles, image fills the box */
.kid-picture-fill .kid-picture-tile {
    min-height: unset;
}

.kid-picture-fill .kid-picture-tile-visual {
    aspect-ratio: 1;
    width: 100%;
    min-height: unset;
    padding: 8px;
    box-sizing: border-box;
}

.kid-picture-fill .kid-picture-tile-visual img {
    flex: 1 1 0;
    min-width: 0;
    min-height: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    object-fit: contain;
    object-position: center;
}

.kid-picture-fill .kid-question-image {
    max-height: 120px;
    width: auto;
    max-width: min(120px, 40vw);
}

/* Fill blank */
.kid-fill-input {
    min-height: 56px;
    font-size: 1.25rem;
    text-align: center;
    padding: 12px 16px;
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius-sm);
    font-weight: 600;
    font-family: var(--kid-font-body);
    background: var(--kid-surface);
    color: var(--kid-text);
    width: 100%;
}

.kid-fill-input:focus {
    border-color: var(--kid-primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.25);
    outline: none;
}

/* Matching */
.kid-matching-hint {
    font-weight: 600;
    color: var(--kid-text);
    margin-bottom: 12px;
}

.matching-game {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.matching-left-column { flex: 2; min-width: 250px; }
.matching-right-column {
    flex: 1;
    min-width: 150px;
    background: var(--kid-primary-light);
    border-radius: var(--kid-radius-sm);
    padding: 0.75rem;
    border: 2px dashed var(--kid-border);
}

.matching-pool-label {
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--kid-text-muted);
    font-size: 0.9rem;
}

.matching-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.matching-left-item {
    background: var(--kid-primary);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--kid-radius-sm);
    font-weight: 600;
    font-size: 1.1rem;
    min-width: 120px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.matching-left-item.tap-selected {
    outline: 3px solid var(--kid-warning);
    transform: scale(1.02);
}

.matching-arrow { font-size: 1.2rem; color: var(--kid-primary); }

.matching-drop-zone {
    flex: 1;
    min-height: 48px;
    border: 2px dashed var(--kid-border);
    border-radius: var(--kid-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.8rem;
    transition: all 0.2s ease;
    background: var(--kid-surface);
}

.matching-drop-zone.drag-over,
.matching-drop-zone.tap-target {
    border-color: var(--kid-primary);
    background: rgba(74, 144, 217, 0.1);
}

.matching-drop-zone.has-match {
    border-style: solid;
    border-color: var(--kid-success);
    background: rgba(124, 179, 66, 0.1);
}

.drop-placeholder { color: var(--kid-text-muted); font-style: italic; }

.matching-draggable, .matching-chip {
    background: var(--kid-warning);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--kid-radius-sm);
    margin-bottom: 0.5rem;
    cursor: grab;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    min-height: var(--kid-touch-min);
    transition: all 0.2s ease;
    border: none;
    width: 100%;
    text-align: left;
}

.matching-chip { cursor: pointer; }
.matching-chip.tap-selected { outline: 3px solid var(--kid-primary); }
.matching-draggable.dragging { opacity: 0.5; }

.matched-item-display {
    background: var(--kid-success);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    width: 100%;
}

.matched-item-display .remove-match {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
}

@media (max-width: 768px) {
    .matching-game { flex-direction: column; }
    .matching-row { flex-wrap: wrap; }
    .matching-left-item { min-width: 100%; }
    .matching-drop-zone { width: 100%; }
}

/* Bottom nav */
.kid-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--kid-surface);
    border-top: 2px solid var(--kid-border);
    padding: 12px 16px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
    z-index: 300;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
}

.kid-bottom-nav .btn {
    min-height: 56px;
    min-width: 120px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--kid-font-body);
    border-radius: var(--kid-radius-sm);
}

.kid-btn-submit {
    min-height: 56px;
    font-size: 1.15rem;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: var(--kid-radius-sm);
}

/* Animations */
.kid-pop { animation: kid-pop 0.15s ease; }
@keyframes kid-pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

@keyframes kid-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

/* Star burst fallback */
.kid-star-burst {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.kid-star-burst span {
    position: absolute;
    font-size: 1.5rem;
    animation: kid-star-fly 1.2s ease-out forwards;
}

@keyframes kid-star-fly {
    0% { opacity: 1; transform: translateY(0) scale(1); }
    100% { opacity: 0; transform: translateY(-80px) scale(0.5); }
}

/* Results */
.kid-results-hero {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--kid-surface);
    border-radius: var(--kid-radius);
    border: 2px solid var(--kid-border);
    margin-bottom: 1.5rem;
}

.kid-score-ring {
    font-family: var(--kid-font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--kid-primary);
    line-height: 1;
}

.kid-review-card {
    border-radius: var(--kid-radius-sm);
    border-left: 6px solid var(--kid-success);
    background: var(--kid-surface);
    margin-bottom: 1rem;
    padding: 1rem;
}

.kid-review-card.incorrect {
    border-left-color: var(--kid-warning);
}

.kid-review-label {
    font-weight: 700;
    font-size: var(--kid-text-body);
    color: var(--kid-text-muted);
}

/* Dashboard cards */
.kid-exam-card {
    border-radius: var(--kid-radius);
    border: 2px solid var(--kid-border);
    background: var(--kid-surface);
    transition: transform 0.15s ease;
}

.kid-exam-card:hover { transform: translateY(-2px); }

.kid-exam-card .btn {
    min-height: 52px;
    font-size: 1.1rem;
    font-weight: 700;
}

.kid-subject-icon {
    font-size: 2.5rem;
    line-height: 1;
}

/* Sticker album */
.kid-sticker-tile {
    min-width: 80px;
    min-height: 80px;
    font-size: 2.5rem;
    border-radius: var(--kid-radius-sm);
    background: var(--kid-surface);
    border: 2px solid var(--kid-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.15s ease;
}

.kid-sticker-tile:hover { transform: scale(1.08); }

/* Auth */
.kid-auth-card {
    border-radius: var(--kid-radius);
    border: 2px solid var(--kid-border);
}

.kid-auth-toggle {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 1000;
}

.kid-auth-card .form-control {
    min-height: 48px;
    font-size: 16px;
}

.kid-option-tile:focus-within,
.kid-picture-tile:focus-within,
.kid-fill-input:focus,
.matching-chip:focus,
.matching-left-item:focus {
    outline: 3px solid var(--kid-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .kid-option-tile,
    .kid-question-card,
    .kid-picture-tile,
    .matching-draggable,
    .kid-sticker-tile {
        transition: none !important;
        animation: none !important;
    }
    .kid-progress-bar.kid-progress-animated { animation: none; }
    .kid-timer-card.timer-urgent { animation: none; }
}

/* Question visibility (exam nav) */
.kid-question-card { display: none; }
.kid-question-card.is-active { display: block; }

.kid-nav-hidden { display: none !important; }
.kid-progress-bar-empty { width: 0%; }

/* PC exam layout — page scrolls so tall picture-choice content is not cropped */
@media (min-width: 992px) {
    .exam-focus-main {
        max-width: 800px;
        width: 100%;
    }

    /* Top bar already shows question counter — hide duplicate progress on PC */
    .exam-focus-stack > .kid-progress-card {
        display: none;
    }

    .exam-focus-stack > .alert.alert-warning {
        padding: 6px 12px;
        margin-bottom: 8px;
        font-size: 0.9rem;
    }

    .kid-option-group[data-option-count="1"] {
        align-items: center;
    }

    .kid-option-group[data-option-count="1"] .kid-option-tile {
        max-width: 360px;
        width: 100%;
    }

    .kid-option-group[data-option-count="2"] {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .kid-option-group[data-option-count="3"],
    .kid-option-group[data-option-count="4"] {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .kid-option-group[data-option-count="3"] .kid-option-tile,
    .kid-option-group[data-option-count="4"] .kid-option-tile,
    .kid-option-group[data-option-count="5"] .kid-option-tile,
    .kid-option-group[data-option-count="6"] .kid-option-tile {
        min-height: 48px;
        padding: 8px 12px;
        font-size: 1rem;
    }

    .kid-picture-grid[data-option-count="1"] {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin: 0 auto;
    }

    .kid-question-card.is-active .kid-question-points {
        display: none;
    }

    .kid-question-card.is-active .kid-question-badge {
        font-size: 0.8rem;
        padding: 4px 10px;
    }

    .kid-question-card.is-active .kid-question-text {
        font-size: clamp(1.1rem, 2.5vh, 1.35rem);
        margin-bottom: 0.35rem;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-question-text {
        margin-bottom: 0.25rem;
    }

    .kid-picture-grid[data-option-count="3"] {
        grid-template-rows: 1fr 1fr;
    }

    .kid-picture-grid[data-option-count="3"] .kid-picture-tile:last-child {
        grid-column: 1 / -1;
        max-width: 50%;
        justify-self: center;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-picture-tile,
    .kid-question-card.is-active.kid-picture-choice-card .kid-picture-tile {
        min-height: 0;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .card-body,
    .kid-question-card.is-active.kid-picture-choice-card .card-body {
        padding: 12px 16px;
        justify-content: stretch;
        align-items: center;
        gap: 0;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-picture-choice-stack,
    .kid-question-card.is-active.kid-picture-choice-card .kid-picture-choice-stack {
        width: 100%;
        max-width: min(720px, 100%);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
        margin: 0 auto;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-question-header,
    .kid-question-card.is-active.kid-picture-choice-card .kid-question-header {
        flex-shrink: 0;
        width: 100%;
        text-align: center;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-question-image,
    .kid-question-card.is-active.kid-picture-choice-card .kid-question-image {
        max-height: 140px;
        margin: 0 auto 8px;
        display: block;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-picture-grid,
    .kid-question-card.is-active.kid-picture-choice-card .kid-picture-grid {
        width: 100%;
        max-width: min(640px, 100%);
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: auto;
        gap: 12px;
        margin: 0 auto;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-picture-tile-visual,
    .kid-question-card.is-active.kid-picture-choice-card .kid-picture-tile-visual {
        min-height: 120px;
        height: auto;
        padding: 12px;
        aspect-ratio: auto;
    }

    .kid-question-card.is-active[data-question-type="PictureChoice"] .kid-picture-tile-visual img,
    .kid-question-card.is-active.kid-picture-choice-card .kid-picture-tile-visual img {
        max-height: 140px;
        height: auto;
        width: auto;
        max-width: 90%;
        object-fit: contain;
        object-position: center;
    }

    /* Coin picture choice: proportional coin sizes, no cropping */
    .kid-question-card.is-active.kid-picture-coins .kid-question-image {
        max-height: 160px;
        width: auto;
        max-width: min(160px, 45%);
    }

    .kid-question-card.is-active.kid-picture-coins .kid-picture-tile-visual {
        min-height: 140px;
    }

    .kid-question-card.is-active.kid-picture-coins .kid-picture-tile-visual img {
        max-height: 150px;
    }

    .kid-picture-coin-quarter img { max-height: 160px; }
    .kid-picture-coin-nickel img { max-height: 150px; }
    .kid-picture-coin-penny img { max-height: 140px; }
    .kid-picture-coin-dime img { max-height: 130px; }

    .kid-question-card.is-active.kid-picture-bills .kid-question-image {
        max-height: 120px;
        max-width: min(320px, 92%);
        width: auto;
        height: auto;
    }

    .kid-picture-tile-text {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 72px;
        font-size: 1.5rem;
        font-weight: 700;
    }

    .kid-picture-tile-text .kid-picture-letter {
        top: 6px;
        left: 6px;
    }

    /* Shapes & colors: compact square grid, images fill tiles */
    .kid-question-card.is-active.kid-picture-fill .kid-picture-grid {
        max-width: min(420px, 100%);
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .kid-question-card.is-active.kid-picture-fill .kid-picture-tile-visual {
        aspect-ratio: 1;
        min-height: unset;
        height: auto;
        width: 100%;
        padding: 12px;
    }

    .kid-question-card.is-active.kid-picture-fill .kid-picture-tile-visual img {
        flex: 1 1 0;
        min-width: 0;
        min-height: 0;
        width: 100%;
        height: 100%;
        max-width: none;
        max-height: none;
        object-fit: contain;
        object-position: center;
    }

    .kid-question-card.is-active.kid-picture-fill .kid-question-image {
        max-height: 130px;
        max-width: min(130px, 32%);
    }
}

/* Results badges */
.kid-review-title { font-size: 1.15rem; }
.kid-review-badge {
    font-size: 1rem;
    min-height: 32px;
    line-height: 1.5;
}

.kid-review-tile {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border: 2px solid var(--kid-border);
    border-radius: var(--kid-radius-sm);
    background: var(--kid-surface);
    font-weight: 600;
    margin: 4px 4px 4px 0;
}

.kid-review-tile.is-chosen { border-color: var(--kid-primary); }
.kid-review-tile.is-correct { border-color: var(--kid-success); background: rgba(124, 179, 66, 0.12); }
.kid-review-tile.is-wrong { border-color: var(--kid-warning); }

.kid-btn-back {
    min-height: 52px;
    min-width: 200px;
}

/* Celebrations */
.perfect-score-celebration-wrap,
.great-score-celebration-wrap {
    width: 100%;
    max-width: 28rem;
    margin: 0 auto;
}

.perfect-score-celebration-wrap.is-dismissed,
.great-score-celebration-wrap.is-dismissed {
    display: none !important;
}

.perfect-score-celebration-card,
.great-score-celebration-card {
    position: relative;
    background: var(--kid-surface);
    border-radius: 1.5rem;
    padding: 2rem 1.5rem 1.25rem;
    padding-top: 2.75rem;
    box-shadow: var(--kid-shadow);
    text-align: center;
    animation: perfect-score-pop 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.perfect-score-celebration-card {
    border: 3px solid var(--kid-star);
}

.great-score-celebration-card {
    border: 3px solid var(--kid-primary);
}

.perfect-score-celebration-x {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--kid-warning);
    background: var(--kid-surface);
}

.perfect-score-celebration-heading { font-size: 1.5rem; font-weight: 800; }
.perfect-score-celebration-stars { font-size: 3rem; margin: 0.5rem 0 1.25rem; }

.perfect-score-celebration-btn,
.great-score-celebration-btn {
    width: 100%;
    min-height: 48px;
    border-radius: 999px;
    font-weight: 700;
    border: none;
    color: #fff !important;
}

.perfect-score-celebration-btn {
    background: linear-gradient(135deg, #eab308, #f59e0b);
}

.great-score-celebration-btn {
    background: linear-gradient(135deg, var(--kid-primary), #6366f1);
}

@keyframes perfect-score-pop {
    from { opacity: 0; transform: scale(0.85) translateY(12px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* Dashboard */
.kid-dashboard-sticker-preview {
    min-width: 0;
    flex: 0 0 auto;
}

.kid-sticker-emoji {
    font-size: 2rem;
    line-height: 1;
}

.kid-sticker-name-wrap {
    min-width: 0;
}

.kid-sticker-name {
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100px;
}

.kid-sticker-date {
    font-size: 0.75rem;
}

.kid-exam-card-body {
    flex: 1;
}

.kid-exam-title {
    margin-bottom: var(--spacing-xs);
}

.kid-exam-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.kid-score-label {
    font-weight: 600;
    color: var(--text-primary);
}

.kid-progress-thin {
    height: 8px;
}

.kid-alert-compact {
    padding: var(--spacing-sm) var(--spacing-md);
}

.kid-cert-header {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

[data-theme="dark"] .kid-cert-header {
    background: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
}

.certificate-stack {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 20px 0;
    perspective: 1000px;
}

.certificate-card {
    position: relative;
    background: var(--kid-surface);
    border-radius: 12px;
    box-shadow: var(--kid-shadow);
    padding: 16px;
    margin-top: -20px;
    transition: transform 0.3s ease, margin-top 0.3s ease, z-index 0.3s ease;
    cursor: pointer;
    border: 2px solid var(--kid-border);
    transform-origin: center;
}

.certificate-card:first-child { margin-top: 0; }
.certificate-card:hover {
    transform: translateY(-8px) scale(1.02);
    margin-top: -28px;
    z-index: 999;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.certificate-card:not(:first-child) { margin-top: -40px; }

.cert-header {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.cert-icon {
    font-size: 2rem;
    margin-right: 12px;
}

.cert-title { flex: 1; }
.cert-title h5 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.cert-title small { color: var(--text-muted); }

.cert-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--kid-progress-bg);
}

.cert-date {
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .certificate-card { margin-top: -30px; }
    .certificate-card:first-child { margin-top: 0; }
    .certificate-card:hover { margin-top: -38px; }
    .kid-mode .col-md-6.col-lg-4.mb-4,
    .kid-mode .col-md-6.col-lg-4.mb-3 {
        width: 100%;
        max-width: 100%;
    }
    .kid-results-hero .kid-score-ring {
        font-size: 3rem;
    }
    .kid-review-card {
        padding: 0.875rem;
    }
}

/* Sticker album */
.kid-sticker-tile-lg {
    width: 100px;
    height: 100px;
    font-size: 3rem;
}

.kid-sticker-tile-enlarged {
    position: fixed;
    inset: 0;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    padding: 1rem;
}

.kid-sticker-tile-enlarged .kid-sticker-tile {
    width: 160px;
    height: 160px;
    font-size: 5rem;
    animation: kid-pop 0.2s ease;
}

.sticker-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.sticker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15) !important;
}

.kid-sticker-recent-emoji {
    font-size: 3rem;
    margin-right: 1rem;
}

.kid-sticker-recent-body { flex: 1; }

.kid-sticker-empty-icon {
    font-size: 5rem;
    color: var(--text-muted);
}

.kid-album-header {
    background: var(--kid-primary);
    color: white;
}

/* Auth */
.kid-auth-page {
    min-height: 80vh;
}

.kid-auth-submit {
    min-height: 52px;
}

/* Hundred chart interactive questions */
.hundred-chart-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0.75rem 0 0.5rem;
    padding-bottom: 0.25rem;
}

.hundred-chart-grid {
    display: grid;
    grid-template-columns: repeat(10, minmax(2.25rem, 1fr));
    gap: 4px;
    min-width: min(100%, 22rem);
    max-width: 32rem;
    margin: 0 auto;
}

.hundred-chart-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 2.5rem;
    padding: 0.15rem;
    border: 2px solid var(--kid-primary, #4a90d9);
    border-radius: 8px;
    background: #fff;
    color: var(--text-primary, #1a1a2e);
    font-weight: 600;
    font-size: clamp(0.75rem, 2.5vw, 0.95rem);
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
    touch-action: manipulation;
}

.hundred-chart-cell:hover:not(.is-selected) {
    background: #eef5fc;
    transform: scale(1.03);
}

.hundred-chart-cell.is-highlight {
    background: #fff3cd;
    border-color: #ffc107;
    color: #664d03;
}

.hundred-chart-cell.is-blank {
    background: #f8f9fa;
    color: var(--kid-primary, #4a90d9);
    font-size: 1.1em;
}

.hundred-chart-cell.is-selected {
    background: var(--kid-primary, #4a90d9);
    border-color: var(--kid-primary-dark, #357abd);
    color: #fff;
    box-shadow: 0 2px 8px rgba(74, 144, 217, 0.35);
}

.hundred-chart-cell.is-selected.is-blank {
    color: #fff;
}

.hundred-chart-cell.is-out-of-range:not(.is-highlight):not(.is-selected):not(.is-blank) {
    opacity: 0.45;
    border-color: #c8d6e5;
    color: #6c757d;
    background: #f8f9fa;
}

.hundred-chart-cell.is-out-of-range.is-highlight,
.hundred-chart-cell.is-out-of-range.is-selected,
.hundred-chart-cell.is-out-of-range.is-blank {
    opacity: 1;
}

/* Read-aloud speaker button */
.kid-question-text-row {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.kid-question-text-row .kid-question-text {
    flex: 1;
    margin-bottom: 0;
}

.kid-read-aloud-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 2px solid var(--kid-primary, #4a90d9);
    border-radius: 50%;
    background: #fff;
    color: var(--kid-primary, #4a90d9);
    cursor: pointer;
    touch-action: manipulation;
    transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.kid-read-aloud-btn:hover {
    background: #eef5fc;
    transform: scale(1.05);
}

.kid-read-aloud-btn.is-speaking {
    background: var(--kid-primary, #4a90d9);
    color: #fff;
    box-shadow: 0 2px 8px rgba(74, 144, 217, 0.35);
}

.kid-read-aloud-btn i {
    font-size: 1.25rem;
    line-height: 1;
}

@media (max-width: 576px) {
    .hundred-chart-grid {
        min-width: 18rem;
    }

    .hundred-chart-cell {
        min-height: 2.25rem;
    }
}

.kid-auth-hidden { display: none; }

.kid-auth-footer {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Treasure Box */
.kid-treasure-chest-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    border-radius: 1rem;
    background: linear-gradient(135deg, #fff8e7 0%, #ffe8a3 55%, #ffd166 100%);
    box-shadow: 0 8px 24px rgba(255, 193, 7, 0.25);
}

[data-theme="dark"] .kid-treasure-chest-header {
    background: linear-gradient(135deg, #3d2f00 0%, #5c4a00 55%, #7a6200 100%);
}

.kid-treasure-chest-icon {
    font-size: 4rem;
    line-height: 1;
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.15));
}

.kid-treasure-shelf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.kid-treasure-tile {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem 0.75rem 1.25rem;
    border-radius: 1rem;
    background: var(--bg-primary, #fff);
    border: 2px solid #e2e8f0;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    min-height: 180px;
}

.kid-treasure-tile:hover {
    transform: translateY(-4px) scale(1.02);
}

.kid-treasure-tile.rarity-common {
    border-color: #94a3b8;
    box-shadow: 0 4px 12px rgba(148, 163, 184, 0.2);
}

.kid-treasure-tile.rarity-rare {
    border-color: #38bdf8;
    box-shadow: 0 4px 16px rgba(56, 189, 248, 0.35);
}

.kid-treasure-tile.rarity-epic {
    border-color: #a855f7;
    box-shadow: 0 4px 18px rgba(168, 85, 247, 0.4);
}

.kid-treasure-tile.rarity-legendary {
    border-color: #f59e0b;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.5);
    animation: kid-treasure-shimmer 2.5s ease-in-out infinite;
}

@keyframes kid-treasure-shimmer {
    0%, 100% { box-shadow: 0 4px 20px rgba(245, 158, 11, 0.45); }
    50% { box-shadow: 0 6px 28px rgba(251, 191, 36, 0.75); }
}

.kid-treasure-tile-emoji {
    font-size: 3.5rem;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.kid-treasure-tile-name {
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.35rem;
}

.kid-treasure-tile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    justify-content: center;
}

.kid-treasure-count-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: #ffc107;
    color: #212529;
    font-weight: 800;
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
}

.kid-treasure-rarity-badge.rarity-common { background: #64748b !important; color: #fff; }
.kid-treasure-rarity-badge.rarity-rare { background: #0ea5e9 !important; color: #fff; }
.kid-treasure-rarity-badge.rarity-epic { background: #9333ea !important; color: #fff; }
.kid-treasure-rarity-badge.rarity-legendary { background: #f59e0b !important; color: #212529; }

.kid-treasure-emoji {
    font-size: 2rem;
    line-height: 1;
}

.kid-treasure-name {
    font-size: 0.9rem;
}

.kid-treasure-date {
    font-size: 0.75rem;
}

.kid-treasure-recent-emoji {
    font-size: 2.5rem;
    line-height: 1;
    margin-right: 0.75rem;
    padding: 0.35rem;
    border-radius: 0.75rem;
    background: #fff8e7;
}

.kid-treasure-recent-body { flex: 1; }

.kid-treasure-empty-chest {
    font-size: 4.5rem;
    line-height: 1;
    opacity: 0.65;
}

.kid-treasure-tile-enlarged {
    position: fixed;
    inset: 0;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.55);
    padding: 1rem;
}

.kid-treasure-tile-enlarged .kid-treasure-tile {
    max-width: 16rem;
    transform: scale(1.15);
    pointer-events: none;
}

/* Treasure celebration overlay */
.treasure-celebration-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    pointer-events: none;
}

.treasure-celebration-overlay .treasure-celebration-backdrop {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(255, 193, 7, 0.3) 0%, rgba(120, 53, 15, 0.7) 70%);
    pointer-events: auto;
    animation: treasure-celebration-fade-in 0.45s ease-out;
}

.treasure-celebration-card {
    position: relative;
    max-width: 22rem;
    width: 100%;
    background: linear-gradient(165deg, #fffbeb 0%, #fef3c7 100%);
    border-radius: 1.5rem;
    padding: 1.75rem 1.5rem 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35), 0 0 0 3px rgba(245, 158, 11, 0.45);
    text-align: center;
    pointer-events: auto;
    animation: treasure-celebration-pop 0.65s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] .treasure-celebration-card {
    background: linear-gradient(165deg, #422006 0%, #78350f 100%);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 0 3px rgba(251, 191, 36, 0.45);
}

.treasure-celebration-chest-lid {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 0.5rem;
    animation: treasure-chest-lid-open 0.8s ease-out forwards;
}

.treasure-celebration-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #b45309;
    background: rgba(245, 158, 11, 0.2);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

.treasure-celebration-heading {
    font-size: 1.35rem;
    font-weight: 800;
    margin: 0 0 0.35rem;
    color: var(--text-primary, #78350f);
    line-height: 1.2;
}

.treasure-celebration-sub {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    color: var(--text-secondary, #92400e);
}

.treasure-celebration-emoji {
    font-size: 5rem;
    line-height: 1;
    margin: 0.25rem 0 0.5rem;
    animation: treasure-celebration-rise 1s ease-out;
    filter: drop-shadow(0 8px 16px rgba(245, 158, 11, 0.35));
}

.treasure-celebration-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary, #78350f);
    margin-bottom: 0.35rem;
}

.treasure-celebration-desc {
    font-size: 0.875rem;
    color: var(--text-muted, #92400e);
    margin: 0 0 0.75rem;
}

.treasure-celebration-from {
    font-size: 0.875rem;
    color: var(--text-secondary, #92400e);
    margin: 0 0 0.5rem;
}

.treasure-celebration-msg {
    font-size: 0.9rem;
    margin: 0 0 1rem;
    padding: 0.75rem 1rem;
    border-left: 4px solid #f59e0b;
    background: rgba(245, 158, 11, 0.12);
    border-radius: 0 0.5rem 0.5rem 0;
    text-align: left;
    color: var(--text-primary, #78350f);
}

.treasure-celebration-btn {
    width: 100%;
    border: none;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #b45309 100%);
    color: #fff !important;
    font-weight: 700;
    border-radius: 999px;
    padding: 0.75rem 1.25rem;
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.45);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.treasure-celebration-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(245, 158, 11, 0.5);
    color: #fff !important;
}

@keyframes treasure-celebration-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes treasure-celebration-pop {
    from { opacity: 0; transform: scale(0.85) translateY(12px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes treasure-chest-lid-open {
    0% { transform: translateY(0) rotate(0deg); }
    40% { transform: translateY(-8px) rotate(-8deg); }
    100% { transform: translateY(-4px) rotate(-4deg); }
}

@keyframes treasure-celebration-rise {
    0% { opacity: 0; transform: translateY(24px) scale(0.6); }
    60% { opacity: 1; transform: translateY(-8px) scale(1.08); }
    100% { transform: translateY(0) scale(1); }
}