.mt-tool {
    --mt-primary: #7c3aed;
    --mt-primary-dark: #5b21b6;
    --mt-accent: #f59e0b;
    --mt-ink: #20134a;
    --mt-muted: #6b6680;
    --mt-line: #e8e2f5;
    --mt-surface: #fff;
    --mt-soft: #f7f4ff;
    color: var(--mt-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    display: flex;
    flex-direction: column;
    gap: clamp(18px, 2.4vw, 28px);
    min-width: 0;
    width: 100%;
}

.mt-tool * {
    box-sizing: border-box;
}

.mt-hero {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(200px, .55fr);
    gap: clamp(16px, 3vw, 28px);
    align-items: center;
    padding: clamp(22px, 4.5vw, 48px);
    border-radius: clamp(18px, 3vw, 28px);
    background:
        radial-gradient(circle at 87% 12%, rgba(255, 255, 255, .25), transparent 24%),
        linear-gradient(135deg, #5b21b6 0%, #7c3aed 55%, #a855f7 100%);
    color: #fff;
    box-shadow: 0 22px 55px rgba(91, 33, 182, .24);
}

.mt-hero::after {
    content: "×";
    position: absolute;
    right: 5%;
    bottom: -70px;
    color: rgba(255, 255, 255, .09);
    font-size: clamp(140px, 28vw, 240px);
    font-weight: 900;
    line-height: 1;
    pointer-events: none;
}

.mt-brand {
    position: relative;
    z-index: 1;
    display: flex;
    gap: clamp(12px, 2vw, 18px);
    align-items: flex-start;
    min-width: 0;
}

.mt-logo {
    display: grid;
    flex: 0 0 66px;
    width: 66px;
    height: 66px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, .42);
    border-radius: 21px;
    background: rgba(255, 255, 255, .18);
    box-shadow: inset 0 1px rgba(255, 255, 255, .35);
    font-size: 34px;
    font-weight: 900;
    backdrop-filter: blur(8px);
}

.mt-kicker {
    margin: 0 0 8px;
    color: #f5d0fe;
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.mt-hero h2 {
    margin: 0;
    font-size: clamp(1.45rem, 4vw, 2.65rem);
    line-height: 1.12;
}

.mt-hero p:not(.mt-kicker) {
    max-width: 650px;
    margin: 12px 0 0;
    color: #ede9fe;
    line-height: 1.65;
}

.mt-mini-stats {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.mt-mini-stats > div {
    padding: clamp(14px, 2.5vw, 18px);
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 18px;
    background: rgba(255, 255, 255, .14);
    text-align: center;
    backdrop-filter: blur(8px);
}

.mt-mini-stats strong {
    display: block;
    font-size: clamp(1.15rem, 3vw, 1.35rem);
}

.mt-mini-stats small,
.mt-mini-stats span {
    display: block;
    margin-top: 6px;
    color: #ede9fe;
    font-size: .78rem;
}

/* Tabs */
.mt-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
    padding: 8px;
    border: 1px solid var(--mt-line);
    border-radius: 18px;
    background: var(--mt-soft);
}

.mt-tabs button,
.mt-tab {
    min-height: 48px;
    padding: 10px 14px;
    border: 0;
    border-radius: 13px;
    background: transparent;
    color: var(--mt-muted);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: .2s ease;
}

.mt-tabs button:hover,
.mt-tab:hover {
    color: var(--mt-primary);
}

.mt-tabs button.is-active,
.mt-tab.is-active {
    background: #fff;
    color: var(--mt-primary-dark);
    box-shadow: 0 5px 18px rgba(76, 29, 149, .12);
}

.mt-panel {
    padding: clamp(18px, 3.5vw, 32px);
    border: 1px solid var(--mt-line);
    border-radius: clamp(18px, 3vw, 24px);
    background: var(--mt-surface);
    box-shadow: 0 16px 45px rgba(46, 27, 84, .09);
    min-width: 0;
}

.mt-panel[hidden] {
    display: none !important;
}

.mt-panel h3,
.mt-panel h4 {
    margin: 0;
}

/* Quick picker */
.mt-quick {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px 18px;
    align-items: start;
    margin: 0 0 clamp(20px, 3vw, 28px);
}

.mt-quick > span {
    padding-top: 12px;
    color: var(--mt-muted);
    font-size: .84rem;
    font-weight: 800;
    white-space: nowrap;
}

.mt-quick > div {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
    gap: 10px;
    width: 100%;
    min-width: 0;
}

.mt-quick button {
    min-width: 0;
    min-height: 44px;
    width: 100%;
    padding: 8px 6px;
    border: 1px solid #ddd6fe;
    border-radius: 12px;
    background: #faf8ff;
    color: var(--mt-primary-dark);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.mt-quick button:hover,
.mt-quick button:focus-visible {
    border-color: var(--mt-primary);
    background: #ede9fe;
    transform: translateY(-2px);
}

/* Settings */
.mt-settings,
.mt-quiz-settings {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px 16px;
}

.mt-settings {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.mt-settings label,
.mt-quiz-settings label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--mt-muted);
    font-size: .84rem;
    font-weight: 750;
    min-width: 0;
}

.mt-settings input,
.mt-settings select,
.mt-quiz-settings input,
.mt-quiz-settings select,
.mt-answer-row input {
    width: 100%;
    border: 1px solid #d8d0e8;
    border-radius: 12px;
    background: #fff;
    color: var(--mt-ink);
    outline: none;
    transition: border-color .18s ease, box-shadow .18s ease;
}

.mt-settings input,
.mt-settings select,
.mt-quiz-settings input,
.mt-quiz-settings select {
    min-height: 46px;
    margin: 0;
    padding: 10px 12px;
}

.mt-settings input:focus,
.mt-settings select:focus,
.mt-quiz-settings input:focus,
.mt-quiz-settings select:focus,
.mt-answer-row input:focus {
    border-color: var(--mt-primary);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, .12);
}

.mt-options {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 22px;
    margin: clamp(18px, 3vw, 24px) 0;
}

.mt-options label {
    display: inline-flex;
    gap: 10px;
    align-items: center;
    color: var(--mt-muted);
    font-weight: 700;
    cursor: pointer;
}

.mt-options input {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    accent-color: var(--mt-primary);
}

.mt-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 12px;
    margin-top: 4px;
}

.mt-action {
    min-height: 45px;
    padding: 10px 17px;
    border: 1px solid transparent;
    border-radius: 12px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.mt-action:hover {
    transform: translateY(-2px);
}

.mt-primary {
    background: linear-gradient(135deg, var(--mt-primary), var(--mt-primary-dark));
    color: #fff;
    box-shadow: 0 8px 20px rgba(91, 33, 182, .22);
}

.mt-outline {
    border-color: #d8d0e8;
    background: #fff;
    color: var(--mt-primary-dark);
}

.mt-outline:hover {
    border-color: var(--mt-primary);
    background: var(--mt-soft);
}

/* Summary */
.mt-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: clamp(20px, 3vw, 28px) 0 16px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #6b21a8;
    font-size: .9rem;
    font-weight: 750;
    line-height: 1.45;
}

.mt-summary:empty {
    display: none;
}

.mt-summary span {
    display: inline-flex;
    align-items: center;
    margin: 0;
    padding: 8px 13px;
    border-radius: 999px;
    background: #f3e8ff;
    color: #6b21a8;
    font-size: .8rem;
    font-weight: 800;
}

/* Table cards — match JS: h3 + ol > li */
.mt-table-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: clamp(14px, 2.5vw, 18px);
}

.mt-table-card {
    overflow: hidden;
    border: 1px solid var(--mt-line);
    border-radius: 17px;
    background: #fff;
    box-shadow: 0 7px 20px rgba(46, 27, 84, .06);
    min-width: 0;
}

.mt-table-card h3,
.mt-table-card h4 {
    margin: 0;
    padding: 14px 16px;
    background: linear-gradient(135deg, #ede9fe, #f5f3ff);
    color: var(--mt-primary-dark);
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -.01em;
}

.mt-table-card ol {
    list-style: none;
    margin: 0;
    padding: 6px 0 8px;
}

.mt-table-card li,
.mt-table-card p {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0;
    padding: 10px 16px;
    border-top: 1px solid #f0edf6;
    color: var(--mt-muted);
    font-variant-numeric: tabular-nums;
    font-size: .95rem;
    line-height: 1.4;
}

.mt-table-card li:first-child,
.mt-table-card p:first-child {
    border-top: 0;
}

.mt-table-card li span,
.mt-table-card p span {
    min-width: 0;
}

.mt-table-card li b,
.mt-table-card li strong,
.mt-table-card p strong,
.mt-table-card p b {
    color: var(--mt-ink);
    font-weight: 800;
    white-space: nowrap;
}

.mt-table-card li.is-five,
.mt-table-card p.is-five {
    background: #fff7ed;
    color: #9a3412;
}

.mt-table-card li.is-five b,
.mt-table-card p.is-five strong {
    color: #9a3412;
}

.mt-table-card li.is-even:not(.is-five),
.mt-table-card p.is-even:not(.is-five) {
    background: #faf8ff;
}

.mt-table-total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0;
    padding: 12px 16px;
    border-top: 2px solid #ddd6fe;
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    color: var(--mt-primary-dark);
    font-size: .95rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.mt-table-total b {
    font-size: 1.05rem;
    font-weight: 900;
    white-space: nowrap;
}

/* Quiz */
.mt-quiz-head {
    display: flex;
    justify-content: space-between;
    gap: 16px 20px;
    align-items: center;
    margin-bottom: 20px;
}

.mt-progress {
    min-width: 140px;
    margin-bottom: 8px;
    color: var(--mt-muted);
    font-size: .85rem;
    font-weight: 800;
    text-align: right;
}

.mt-question-card {
    margin-top: 16px;
    padding: clamp(22px, 4.5vw, 42px);
    border: 1px solid #ddd6fe;
    border-radius: 22px;
    background:
        radial-gradient(circle at 95% 5%, rgba(168, 85, 247, .13), transparent 31%),
        linear-gradient(145deg, #faf8ff, #fff);
    text-align: center;
}

.mt-count {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 999px;
    background: #ede9fe;
    color: var(--mt-primary-dark);
    font-size: .78rem;
    font-weight: 850;
}

.mt-question {
    margin: 18px 0;
    color: var(--mt-ink);
    font-size: clamp(2rem, 8vw, 4.15rem);
    font-weight: 900;
    letter-spacing: -.04em;
    line-height: 1.1;
    word-break: break-word;
}

.mt-question-card > label {
    display: block;
    margin-bottom: 10px;
    color: var(--mt-muted);
    font-size: .88rem;
    font-weight: 750;
}

.mt-answer-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    max-width: 460px;
    margin: 0 auto;
}

.mt-answer-row input {
    min-width: 0;
    min-height: 51px;
    margin: 0;
    padding: 10px 15px;
    text-align: center;
    font-size: 1.15rem;
    font-weight: 800;
}

.mt-hint {
    display: inline-block;
    margin: 16px 0 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: #7c2d12;
    font: inherit;
    font-weight: 750;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.mt-hint:disabled {
    opacity: .55;
    cursor: default;
    text-decoration: none;
}

.mt-feedback {
    min-height: 48px;
    margin-top: 18px;
    padding: 13px 15px;
    border-radius: 13px;
    background: #f4f1f8;
    color: var(--mt-muted);
    font-weight: 800;
}

.mt-feedback.is-correct {
    background: #dcfce7;
    color: #166534;
}

.mt-feedback.is-error {
    background: #fee2e2;
    color: #991b1b;
}

.mt-feedback.is-info {
    background: #e0f2fe;
    color: #075985;
}

.mt-score-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.mt-score-grid > div {
    padding: 14px 10px;
    border: 1px solid var(--mt-line);
    border-radius: 13px;
    background: #fff;
    text-align: center;
}

.mt-score-grid strong,
.mt-score-grid span {
    display: block;
}

.mt-score-grid strong {
    color: var(--mt-primary-dark);
    font-size: 1.2rem;
}

.mt-score-grid span {
    margin-top: 4px;
    color: var(--mt-muted);
    font-size: .72rem;
    font-weight: 700;
}

.mt-results {
    margin-top: 20px;
    padding: clamp(22px, 4vw, 28px);
    border: 1px solid #ddd6fe;
    border-radius: 20px;
    background: linear-gradient(145deg, #faf5ff, #fff);
    text-align: center;
}

.mt-results[hidden] {
    display: none !important;
}

.mt-results h3 {
    color: var(--mt-primary-dark);
    font-size: clamp(1.35rem, 3vw, 1.65rem);
}

.mt-results p {
    margin: 12px 0 18px;
    color: var(--mt-muted);
    line-height: 1.65;
}

.mt-status {
    min-height: 22px;
    margin: 4px 0 0;
    color: var(--mt-muted);
    font-size: .86rem;
    font-weight: 750;
}

.mt-status.is-success {
    color: #15803d;
}

.mt-status.is-error {
    color: #b91c1c;
}

/* ---------- Tablet ---------- */
@media (max-width: 900px) {
    .mt-settings {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .mt-quick > div {
        grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
    }
}

@media (max-width: 780px) {
    .mt-hero {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .mt-settings,
    .mt-quiz-settings {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .mt-quick {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 22px;
    }

    .mt-quick > span {
        padding-top: 0;
    }

    .mt-quiz-head {
        align-items: stretch;
        flex-direction: column;
        gap: 14px;
    }

    .mt-quiz-settings {
        width: 100%;
    }

    .mt-progress {
        text-align: left;
        min-width: 0;
    }

    .mt-table-grid {
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
        gap: 14px;
    }
}

/* ---------- Phone ---------- */
@media (max-width: 560px) {
    .mt-tool {
        gap: 14px;
    }

    .mt-hero {
        padding: 20px 16px;
        border-radius: 18px;
    }

    .mt-brand {
        flex-direction: column;
        gap: 12px;
    }

    .mt-logo {
        width: 56px;
        height: 56px;
        flex-basis: 56px;
        border-radius: 16px;
        font-size: 28px;
        margin-bottom: 0;
    }

    .mt-hero p:not(.mt-kicker) {
        margin-top: 10px;
        font-size: .95rem;
    }

    .mt-mini-stats > div {
        padding: 12px 10px;
        border-radius: 14px;
    }

    .mt-tabs {
        gap: 8px;
        padding: 6px;
        border-radius: 14px;
    }

    .mt-tabs button,
    .mt-tab {
        min-height: 44px;
        padding: 8px 10px;
        font-size: .92rem;
        border-radius: 11px;
    }

    .mt-panel {
        padding: 16px 14px;
        border-radius: 16px;
    }

    .mt-settings,
    .mt-quiz-settings {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .mt-quick {
        margin-bottom: 18px;
    }

    .mt-quick > div {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 8px;
    }

    .mt-quick button {
        min-height: 42px;
        border-radius: 10px;
        font-size: .95rem;
    }

    .mt-options {
        flex-direction: column;
        gap: 12px;
        margin: 16px 0;
    }

    .mt-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .mt-actions .mt-action {
        width: 100%;
        min-height: 44px;
        padding: 10px 12px;
        font-size: .88rem;
    }

    .mt-actions .mt-primary {
        grid-column: 1 / -1;
    }

    .mt-summary {
        margin: 18px 0 14px;
        gap: 8px;
    }

    .mt-summary span {
        padding: 7px 11px;
        font-size: .78rem;
    }

    .mt-table-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .mt-table-card {
        border-radius: 14px;
    }

    .mt-table-card h3,
    .mt-table-card h4 {
        padding: 12px 14px;
        font-size: 1rem;
    }

    .mt-table-card li,
    .mt-table-card p {
        padding: 11px 14px;
        font-size: .94rem;
        gap: 10px;
    }

    .mt-table-total {
        padding: 11px 14px;
        font-size: .92rem;
    }

    .mt-question-card {
        padding: 20px 14px;
        border-radius: 16px;
    }

    .mt-answer-row {
        flex-direction: column;
        max-width: none;
    }

    .mt-answer-row .mt-action {
        width: 100%;
    }

    .mt-score-grid {
        gap: 8px;
    }

    .mt-score-grid > div {
        padding: 12px 6px;
    }

    .mt-results {
        padding: 18px 14px;
        border-radius: 16px;
    }
}

@media (max-width: 380px) {
    .mt-quick > div {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .mt-actions {
        grid-template-columns: 1fr;
    }

    .mt-mini-stats {
        gap: 8px;
    }
}

@media print {
    .mt-hero,
    .mt-tabs,
    .mt-settings,
    .mt-options,
    .mt-actions,
    .mt-summary,
    .mt-status,
    .mt-quick,
    #MultiplicationTablesQuiz {
        display: none !important;
    }

    .mt-panel {
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    .mt-table-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .mt-table-card {
        break-inside: avoid;
        box-shadow: none;
    }
}