.wp-block-hustoj-edu-games-ai-classifier-lab,
.hustoj-ai-classifier-lab-block {
    width: min(var(--hustoj-shell-width, 1120px), calc(100% - (var(--hustoj-shell-padding-x, 1rem) * 2)));
    max-width: none;
    margin: 0 auto;
    box-sizing: border-box;
}

.oj-ai-shell {
    --ai-bg: #f6f8fb;
    --ai-ink: #172033;
    --ai-muted: #657186;
    --ai-line: #d7dee9;
    --ai-panel: #ffffff;
    --ai-primary: #1d6fd8;
    --ai-primary-dark: #154a90;
    --ai-red: #e65d4f;
    --ai-green: #1f8a55;
    --ai-yellow: #f2b830;
    width: 100%;
    color: var(--ai-ink);
    font-family: Inter, "Segoe UI", Arial, sans-serif;
}

.oj-ai-shell * {
    box-sizing: border-box;
}

.oj-ai-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0 14px;
}

.oj-ai-kicker {
    margin: 0 0 4px;
    color: var(--ai-green);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.oj-ai-topbar h2 {
    margin: 0;
    font-size: clamp(1.7rem, 3vw, 2.6rem);
    line-height: 1.05;
}

.oj-ai-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.oj-ai-select,
.oj-ai-button,
.oj-ai-mode {
    min-height: 42px;
    border: 1px solid var(--ai-line);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ai-ink);
    font: inherit;
    font-weight: 900;
}

.oj-ai-select {
    padding: 0 34px 0 12px;
}

.oj-ai-button,
.oj-ai-mode {
    padding: 0 14px;
    cursor: pointer;
}

.oj-ai-button-primary,
.oj-ai-mode.is-active {
    border-color: var(--ai-primary);
    background: var(--ai-primary);
    color: #ffffff;
}

.oj-ai-modebar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 10px;
}

.oj-ai-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 10px;
}

.oj-ai-stat {
    min-width: 0;
    min-height: 74px;
    padding: 12px;
    border: 1px solid var(--ai-line);
    border-radius: 8px;
    background: #ffffff;
}

.oj-ai-stat span {
    display: block;
    margin-bottom: 6px;
    color: var(--ai-muted);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.oj-ai-stat strong {
    display: block;
    font-size: 1.6rem;
    line-height: 1;
    text-align: right;
}

.oj-ai-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 310px;
    gap: 12px;
    align-items: start;
}

.oj-ai-panel {
    min-width: 0;
    border: 1px solid var(--ai-line);
    border-radius: 8px;
    background: var(--ai-panel);
    overflow: hidden;
}

.oj-ai-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 56px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--ai-line);
    background: #f9fbfe;
}

.oj-ai-panel-head span {
    color: var(--ai-muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.oj-ai-panel-head h3 {
    margin: 3px 0 0;
    font-size: 1.1rem;
    line-height: 1.25;
}

.oj-ai-context {
    padding: 14px 16px;
    border-bottom: 1px solid var(--ai-line);
    background: #fff8e5;
    color: #6e4b00;
    font-weight: 850;
    line-height: 1.45;
}

.oj-ai-board {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    background:
        linear-gradient(90deg, rgba(29, 111, 216, 0.06) 1px, transparent 1px),
        linear-gradient(0deg, rgba(31, 138, 85, 0.05) 1px, transparent 1px),
        var(--ai-bg);
    background-size: 30px 30px;
}

.oj-ai-chart {
    min-width: 0;
    padding: 14px;
    border-right: 1px solid var(--ai-line);
}

.oj-ai-svg {
    display: block;
    width: 100%;
    min-height: 320px;
    border: 1px solid #cdd8e7;
    border-radius: 8px;
    background: #ffffff;
}

.oj-ai-axis {
    stroke: #8c9bb0;
    stroke-width: 2;
}

.oj-ai-grid {
    stroke: #e7edf6;
    stroke-width: 1;
}

.oj-ai-tick {
    stroke: #8c9bb0;
    stroke-width: 1.5;
}

.oj-ai-tick-label {
    fill: #657186;
    font-size: 10px;
    font-weight: 900;
    text-anchor: middle;
}

.oj-ai-tick-label-y {
    text-anchor: end;
}

.oj-ai-axis-label,
.oj-ai-query-label {
    fill: #3e4b60;
    font-size: 12px;
    font-weight: 900;
    text-anchor: middle;
}

.oj-ai-point {
    stroke: #ffffff;
    stroke-width: 2;
}

.oj-ai-point.is-A,
.oj-ai-legend i.is-A,
.oj-ai-label.is-A::before {
    fill: #1d6fd8;
    background: #1d6fd8;
}

.oj-ai-point.is-B,
.oj-ai-legend i.is-B,
.oj-ai-label.is-B::before {
    fill: #e65d4f;
    background: #e65d4f;
}

.oj-ai-query {
    fill: var(--ai-yellow);
    stroke: #5d4300;
    stroke-width: 2;
}

.oj-ai-boundary {
    stroke: #172033;
    stroke-dasharray: 8 6;
    stroke-linecap: round;
    stroke-width: 4;
}

.oj-ai-boundary-label {
    paint-order: stroke;
    fill: #172033;
    stroke: #ffffff;
    stroke-width: 5px;
    font-size: 12px;
    font-weight: 1000;
    text-anchor: middle;
}

.oj-ai-legend {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.oj-ai-legend span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--ai-muted);
    font-size: 0.82rem;
    font-weight: 900;
}

.oj-ai-legend i {
    width: 13px;
    height: 13px;
    border-radius: 50%;
}

.oj-ai-legend i.is-query {
    border-radius: 3px;
    background: var(--ai-yellow);
}

.oj-ai-workbench {
    display: grid;
    gap: 14px;
    padding: 14px;
    background: rgba(255, 255, 255, 0.72);
}

.oj-ai-workbench h4 {
    margin: 0 0 8px;
    font-size: 0.92rem;
}

.oj-ai-rule-options,
.oj-ai-label-options {
    display: grid;
    gap: 8px;
}

.oj-ai-rule,
.oj-ai-label {
    min-height: 46px;
    padding: 8px 10px;
    border: 1px solid var(--ai-line);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ai-ink);
    cursor: pointer;
    font: inherit;
    font-size: 0.88rem;
    font-weight: 900;
    text-align: left;
}

.oj-ai-rule {
    display: grid;
    gap: 4px;
}

.oj-ai-rule small {
    display: inline-flex;
    width: fit-content;
    padding: 2px 7px;
    border-radius: 999px;
    background: #eef4ff;
    color: var(--ai-primary-dark);
    font-size: 0.72rem;
    font-weight: 1000;
}

.oj-ai-label {
    position: relative;
    padding-left: 32px;
}

.oj-ai-label::before {
    content: "";
    position: absolute;
    left: 11px;
    top: 50%;
    width: 12px;
    height: 12px;
    transform: translateY(-50%);
    border-radius: 50%;
}

.oj-ai-rule.is-selected,
.oj-ai-label.is-selected {
    border-color: var(--ai-yellow);
    background: #fff7d8;
    color: #5d4300;
}

.oj-ai-rule.is-selected small {
    background: #ffeaa2;
    color: #5d4300;
}

.oj-ai-rule.is-answer,
.oj-ai-label.is-answer {
    border-color: var(--ai-green);
    background: #e9f8ef;
    color: #126238;
}

.oj-ai-rule.is-answer small {
    background: #c9efd8;
    color: #126238;
}

.oj-ai-submit-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
}

.oj-ai-feedback {
    min-width: 0;
    margin: 0;
    color: var(--ai-green);
    font-weight: 900;
    line-height: 1.4;
}

.oj-ai-side {
    display: grid;
    gap: 12px;
    position: sticky;
    top: 24px;
}

.oj-ai-rules {
    display: grid;
    gap: 10px;
    padding: 12px;
}

.oj-ai-rules div {
    display: grid;
    gap: 4px;
    padding: 10px;
    border: 1px solid #e6ebf2;
    border-radius: 8px;
    background: #fbfcff;
}

.oj-ai-rules strong {
    font-weight: 900;
}

.oj-ai-rules span {
    color: var(--ai-muted);
    font-size: 0.85rem;
    font-weight: 800;
    line-height: 1.45;
}

.oj-ai-leaderboard {
    display: grid;
    gap: 6px;
    padding: 10px;
}

.oj-ai-rank-head,
.oj-ai-rank-row {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 66px;
    gap: 8px;
    align-items: center;
}

.oj-ai-rank-head {
    padding: 0 8px 4px;
    color: var(--ai-muted);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.oj-ai-rank-row {
    min-height: 40px;
    padding: 8px;
    border: 1px solid var(--ai-line);
    border-radius: 8px;
    background: #ffffff;
}

.oj-ai-rank-row.is-me {
    border-color: var(--ai-primary);
    background: #edf5ff;
}

.oj-ai-rank-row span {
    min-width: 0;
    overflow: hidden;
    font-weight: 800;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.oj-ai-rank-row b {
    color: var(--ai-primary-dark);
    text-align: right;
}

.oj-ai-rank-empty {
    min-height: 84px;
    display: grid;
    place-items: center;
    color: var(--ai-muted);
    font-weight: 800;
    text-align: center;
}

@media (max-width: 980px) {
    .oj-ai-topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .oj-ai-layout {
        grid-template-columns: 1fr;
    }

    .oj-ai-side {
        position: static;
    }
}

@media (max-width: 820px) {
    .oj-ai-board {
        grid-template-columns: 1fr;
    }

    .oj-ai-chart {
        border-right: 0;
        border-bottom: 1px solid var(--ai-line);
    }
}

@media (max-width: 680px) {
    .wp-block-hustoj-edu-games-ai-classifier-lab,
    .hustoj-ai-classifier-lab-block {
        width: calc(100% - 12px);
    }

    .oj-ai-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .oj-ai-submit-row {
        align-items: stretch;
        flex-direction: column;
    }
}