/* ============================================================
   Kids Kingdom - Place Value / Missing Number / Patterns /
   Measurement / Fractions Tools
   Reuses .addition-tool, .addition-picker, .addition-show-btn,
   .addition-steps-*, .story-images-grid from addition.css.
   ============================================================ */

/* ================= PLACE VALUE: tens + ones blocks ================= */
.pv-blocks-row {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.pv-group {
    text-align: center;
}

.pv-group-label {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.pv-tens-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    max-width: 200px;
}

.pv-ten-block {
    width: 24px;
    height: 90px;
    background: var(--color-primary);
    border-radius: 6px;
    opacity: 0;
    animation: additionPop 0.35s ease forwards;
}

.pv-ones-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    max-width: 140px;
}

.pv-one-block {
    width: 20px;
    height: 20px;
    background: var(--color-secondary);
    border-radius: 4px;
    opacity: 0;
    animation: additionPop 0.35s ease forwards;
}

.pv-equation-text {
    text-align: center;
    font-size: 1.2rem;
    color: var(--color-dark);
    font-weight: 600;
}

/* ================= MISSING NUMBER: equation with blank + choices ================= */
.mn-equation-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 26px;
    flex-wrap: wrap;
}

.mn-blank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--color-bg);
    border: 3px dashed var(--color-primary);
    color: var(--color-primary);
}

.mn-blank.is-filled {
    border-style: solid;
    background: #fff;
}

.mn-choices {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.mn-choice-btn {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: #fff;
    border: 2px solid var(--color-bg);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--color-dark);
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
}

.mn-choice-btn:hover {
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.mn-choice-btn.is-correct {
    background: #D9F5F2;
    border-color: #1B9C8E;
    color: #1B9C8E;
}

.mn-choice-btn.is-wrong {
    background: #FFE5E5;
    border-color: #E0554F;
    color: #E0554F;
}

.mn-feedback-text {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    min-height: 30px;
}

/* ================= PATTERNS: sequence with missing item ================= */
.pattern-sequence {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.pattern-item {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    background: #fff;
    border: 2px solid var(--color-bg);
    border-radius: 12px;
}

.pattern-item.is-blank {
    border: 3px dashed var(--color-primary);
    background: var(--color-bg);
}

.pattern-choices {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.pattern-choice-btn {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: #fff;
    border: 2px solid var(--color-bg);
    font-size: 1.6rem;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
}

.pattern-choice-btn:hover {
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.pattern-choice-btn.is-correct {
    background: #D9F5F2;
    border-color: #1B9C8E;
}

.pattern-choice-btn.is-wrong {
    background: #FFE5E5;
    border-color: #E0554F;
}

/* ================= MEASUREMENT: two objects compared ================= */
.measure-compare-row {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 40px;
    margin-bottom: 24px;
    min-height: 140px;
}

.measure-object {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    border-radius: var(--radius);
    border: 2px solid var(--color-bg);
    background: #fff;
    transition: border-color 0.3s, background 0.3s;
}

.measure-object.is-winner {
    border-color: var(--color-primary);
    background: var(--color-bg);
}

.measure-emoji {
    font-size: 3rem;
}

.measure-object-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: #777;
}

.measure-mode-selector {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.measure-mode-btn {
    background: var(--color-bg);
    color: var(--color-dark);
    border: none;
    padding: 10px 20px;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
}

.measure-mode-btn.active {
    background: var(--color-primary);
    color: #fff;
}

.measure-result-text {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-dark);
    font-weight: 600;
}

/* ================= FRACTIONS: shape cutting ================= */
.fraction-shape-selector,
.fraction-type-selector {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.fraction-shape-btn,
.fraction-type-btn {
    background: var(--color-bg);
    color: var(--color-dark);
    border: none;
    padding: 10px 20px;
    border-radius: 999px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
}

.fraction-shape-btn.active,
.fraction-type-btn.active {
    background: var(--color-primary);
    color: #fff;
}

.fraction-visual {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.fraction-svg-wrap {
    width: 200px;
    height: 200px;
}

.fraction-result-text {
    text-align: center;
    font-size: 1.2rem;
    color: var(--color-dark);
    font-weight: 600;
}

.fraction-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-primary);
    font-weight: 800;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 767px) {
    .pv-blocks-row {
        gap: 18px;
    }

    .mn-equation-display {
        font-size: 1.6rem;
    }

    .mn-blank {
        width: 46px;
        height: 46px;
    }

    .measure-compare-row {
        gap: 20px;
    }

    .measure-emoji {
        font-size: 2.2rem;
    }
}