/* =========================================================
   LearnerBox Statistical Explorer
   Stage 3–4 component shell
   Visual language aligned with LearnerBox Dataset Viewer
   ========================================================= */

.lb-stat-explorer {
    --lb-se-accent: #2563eb;
    --lb-se-accent-soft: #eff6ff;
    --lb-se-border: #dbe3ee;
    --lb-se-text: #172033;
    --lb-se-muted: #667085;
    --lb-se-panel: #f8fafc;
    --lb-se-panel-strong: #eef2f6;
    --lb-se-warning: #b54708;
    --lb-se-warning-soft: #fff4e5;
    --lb-se-error: #8a1c1c;
    --lb-se-error-soft: #fff1f1;
    --lb-se-rejection: #f5b8c4;
    --lb-se-non-rejection: #bfe3d6;
    --lb-se-shadow: 0 5px 18px rgba(15, 23, 42, 0.045);

    display: block;
    margin: 1rem 0;
    color: var(--lb-se-text);
    font-family: inherit;
}

.lb-stat-explorer,
.lb-stat-explorer * {
    box-sizing: border-box;
}

.lb-stat-explorer .lb-se-shell {
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--lb-se-border);
    border-radius: 14px;
    box-shadow: var(--lb-se-shadow);
}

/* ---------- Heading ---------- */

.lb-stat-explorer .lb-se-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 1rem 0.7rem;
}

.lb-stat-explorer .lb-se-heading-copy {
    min-width: 0;
}

.lb-stat-explorer .lb-se-heading h2 {
    margin: 0.08rem 0 0.25rem;
    color: var(--lb-se-text);
    font-size: clamp(1.25rem, 2.2vw, 1.75rem);
    font-weight: 600;
    line-height: 1.15;
}

.lb-stat-explorer .lb-se-heading p {
    max-width: 760px;
    margin: 0;
    color: var(--lb-se-muted);
    font-size: 0.9rem;
    line-height: 1.45;
}

.lb-stat-explorer .lb-se-kicker {
    margin-bottom: 0.15rem !important;
    color: var(--lb-se-accent) !important;
    font-size: 0.7rem !important;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.lb-stat-explorer .lb-se-heading-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0.45rem;
    flex: 0 0 auto;
}

.lb-stat-explorer .lb-se-status {
    padding: 0.32rem 0.58rem;
    color: var(--lb-se-muted);
    font-size: 0.76rem;
    font-weight: 700;
    white-space: nowrap;
    border: 1px solid var(--lb-se-border);
    border-radius: 999px;
}

/* ---------- Buttons ---------- */

.lb-stat-explorer .lb-se-button,
.lb-stat-explorer .lb-se-chip {
    appearance: none;
    font: inherit;
    cursor: pointer;
    transition:
        background-color 0.18s ease,
        border-color 0.18s ease,
        color 0.18s ease,
        box-shadow 0.18s ease,
        transform 0.18s ease;
}

.lb-stat-explorer .lb-se-button {
    padding: 0.48rem 0.72rem;
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    background: var(--lb-se-accent);
    border: 1px solid var(--lb-se-accent);
    border-radius: 9px;
}

.lb-stat-explorer .lb-se-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.15);
}

.lb-stat-explorer .lb-se-button-secondary {
    color: var(--lb-se-text);
    background: #fff;
    border-color: var(--lb-se-border);
}

.lb-stat-explorer .lb-se-button-secondary:hover {
    color: var(--lb-se-accent);
    background: var(--lb-se-accent-soft);
    border-color: #b8cdf8;
}

/* ---------- Tabs ---------- */

.lb-stat-explorer .lb-se-tabs {
    display: flex;
    gap: 0.15rem;
    padding: 0 1rem;
    overflow-x: auto;
    scrollbar-width: thin;
    border-bottom: 1px solid var(--lb-se-border);
}

.lb-stat-explorer .lb-se-tab {
    flex: 0 0 auto;
    padding: 0.62rem 0.68rem;
    color: var(--lb-se-muted);
    font: inherit;
    font-size: 0.88rem;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
}

.lb-stat-explorer .lb-se-tab:hover {
    color: var(--lb-se-accent);
    background: var(--lb-se-accent-soft);
}

.lb-stat-explorer .lb-se-tab.is-active {
    color: var(--lb-se-accent);
    border-bottom-color: var(--lb-se-accent);
}

.lb-stat-explorer .lb-se-tab-label-short {
    display: none;
}

/* ---------- Panels and workspace ---------- */

.lb-stat-explorer .lb-se-body {
    background: #fff;
}

.lb-stat-explorer .lb-se-panel {
    padding: 0.7rem 0.75rem 0.8rem;
}

.lb-stat-explorer .lb-se-panel[hidden] {
    display: none !important;
}

.lb-stat-explorer .lb-se-workspace {
    display: grid;
    gap: 0.65rem;
}

.lb-stat-explorer .lb-se-section {
    padding: 0.75rem;
    background: #fff;
    border: 1px solid var(--lb-se-border);
    border-radius: 10px;
}

.lb-stat-explorer .lb-se-section-heading {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 0.65rem;
}

.lb-stat-explorer .lb-se-section-heading h3 {
    margin: 0 0 0.12rem;
    color: var(--lb-se-text);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.2;
}

.lb-stat-explorer .lb-se-section-heading p {
    margin: 0;
    color: var(--lb-se-muted);
    font-size: 0.78rem;
    line-height: 1.4;
}

.lb-stat-explorer .lb-se-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    color: #fff;
    font-size: 0.78rem;
    font-weight: 800;
    background: var(--lb-se-accent);
    border-radius: 50%;
}

/* ---------- Controls ---------- */

.lb-stat-explorer .lb-se-controls {
    display: grid;
    gap: 0.6rem;
}

.lb-stat-explorer .lb-se-control-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(130px, 1fr));
    gap: 0.65rem;
    align-items: end;
}

.lb-stat-explorer .lb-se-field {
    display: grid;
    gap: 0.22rem;
    min-width: 0;
    color: var(--lb-se-text);
    font-size: 0.78rem;
    font-weight: 700;
}

.lb-stat-explorer .lb-se-field-wide {
    grid-column: span 2;
}

.lb-stat-explorer .lb-se-field-wide-alternative {
    grid-column: span 2;
}

.lb-stat-explorer .lb-se-field input,
.lb-stat-explorer .lb-se-field select {
    width: 100%;
    min-width: 0;
    padding: 0.5rem 0.62rem;
    color: var(--lb-se-text);
    font: inherit;
    font-size: 0.88rem;
    font-weight: 400;
    background: #fff;
    border: 1px solid var(--lb-se-border);
    border-radius: 9px;
    outline: none;
}

.lb-stat-explorer .lb-se-field select {
    min-height: 42px;
    border-width: 1px;
    outline: none;
    transform: none;
    box-shadow: none;
}

.lb-stat-explorer .lb-se-field select:hover {
    border-color: var(--lb-se-border);
    transform: none;
    box-shadow: none;
}

.lb-stat-explorer .lb-se-field input:focus,
.lb-stat-explorer .lb-se-field select:focus,
.lb-stat-explorer .lb-se-button:focus-visible,
.lb-stat-explorer .lb-se-tab:focus-visible,
.lb-stat-explorer .lb-se-chip:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.22);
    outline-offset: 2px;
    border-color: var(--lb-se-accent);
}

.lb-stat-explorer .lb-se-control-note {
    margin: 0;
    color: var(--lb-se-muted);
    font-size: 0.78rem;
    line-height: 1.45;
}

.lb-stat-explorer .lb-se-quick-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    color: var(--lb-se-muted);
    font-size: 0.78rem;
}

.lb-stat-explorer .lb-se-chip {
    padding: 0.35rem 0.55rem;
    color: var(--lb-se-text);
    font-size: 0.76rem;
    font-weight: 700;
    background: #fff;
    border: 1px solid var(--lb-se-border);
    border-radius: 999px;
}

.lb-stat-explorer .lb-se-chip:hover {
    color: var(--lb-se-accent);
    background: var(--lb-se-accent-soft);
    border-color: #b8cdf8;
}

/* ---------- Formula and results ---------- */

.lb-stat-explorer .lb-se-math {
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem;
    overflow-x: auto;
    color: var(--lb-se-text);
    background: var(--lb-se-panel);
    border: 1px solid var(--lb-se-border);
    border-radius: 9px;
    font-size: 1rem;
    text-align: center;
}

.lb-stat-explorer .lb-se-result-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
}

.lb-stat-explorer .lb-se-result-card {
    padding: 0.65rem;
    min-width: 0;
    background: var(--lb-se-panel);
    border: 1px solid var(--lb-se-border);
    border-radius: 9px;
}

.lb-stat-explorer .lb-se-result-card span {
    display: block;
    color: var(--lb-se-muted);
    font-size: 0.72rem;
    font-weight: 700;
}

.lb-stat-explorer .lb-se-result-card strong {
    display: block;
    margin-top: 0.18rem;
    overflow-wrap: anywhere;
    color: var(--lb-se-text);
    font-size: 0.92rem;
    font-variant-numeric: tabular-nums;
}

/* ---------- Chart ---------- */

.lb-stat-explorer .lb-se-chart-card {
    padding: 0.65rem;
    background: #fff;
    border: 1px solid var(--lb-se-border);
    border-radius: 10px;
}

.lb-stat-explorer .lb-se-chart {
    display: block;
    width: 100%;
    height: auto;
    min-height: 260px;
    max-height: 440px;
    background: var(--lb-se-panel);
    border-radius: 8px;
}

.lb-stat-explorer .lb-se-chart-key {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem 0.85rem;
    margin-top: 0.5rem;
    color: var(--lb-se-muted);
    font-size: 0.76rem;
}

.lb-stat-explorer .lb-se-chart-key span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.lb-stat-explorer .lb-se-key-swatch {
    display: inline-block;
    flex: 0 0 12px;
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.lb-stat-explorer .lb-se-key-swatch.is-selected {
    background: var(--lb-se-accent);
    border: 2px solid #153c9f;
}

.lb-stat-explorer .lb-se-key-swatch.is-reference {
    background:
        repeating-linear-gradient(
            45deg,
            #dbe3ee,
            #dbe3ee 3px,
            #fff 3px,
            #fff 6px
        );
    border: 1px solid #9ca9bb;
}

/* ---------- Interpretation and conclusion ---------- */

.lb-stat-explorer .lb-se-message {
    padding: 0.7rem 0.8rem;
    color: var(--lb-se-text);
    background: var(--lb-se-accent-soft);
    border-left: 4px solid var(--lb-se-accent);
    border-radius: 8px;
}

.lb-stat-explorer .lb-se-message p {
    margin: 0;
    font-size: 0.84rem;
    line-height: 1.55;
}

.lb-stat-explorer .lb-se-message-conclusion {
    background: #f2faf7;
    border-left-color: #13866f;
}

.lb-stat-explorer .lb-se-validation {
    padding: 0.65rem 0.75rem;
    color: var(--lb-se-warning);
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--lb-se-warning-soft);
    border: 1px solid #f2cf9a;
    border-radius: 9px;
}

.lb-stat-explorer .lb-se-validation[hidden] {
    display: none !important;
}

/* ---------- Dependency error ---------- */

.lb-stat-explorer .lb-se-error {
    padding: 1rem;
    color: var(--lb-se-error);
    background: var(--lb-se-error-soft);
    border: 1px solid #f0b4b4;
    border-radius: 10px;
}

.lb-stat-explorer .lb-se-error strong {
    display: block;
    margin-bottom: 0.35rem;
}

.lb-stat-explorer .lb-se-error p {
    margin: 0.35rem 0 0;
    font-size: 0.86rem;
    line-height: 1.5;
}

.lb-stat-explorer .lb-se-error code {
    padding: 0.1rem 0.25rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 4px;
}

/* ---------- Responsive adjustments ---------- */

@media (max-width: 980px) {
    .lb-stat-explorer .lb-se-control-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lb-stat-explorer .lb-se-field-wide {
        grid-column: span 2;
    }
}

@media (max-width: 700px) {
    .lb-stat-explorer .lb-se-heading {
        display: block;
        padding: 0.75rem 0.8rem 0.55rem;
    }

    .lb-stat-explorer .lb-se-heading-actions {
        justify-content: flex-start;
        margin-top: 0.6rem;
    }

    .lb-stat-explorer .lb-se-tabs {
        padding: 0 0.7rem;
    }

    .lb-stat-explorer .lb-se-panel {
        padding: 0.7rem;
    }

    .lb-stat-explorer .lb-se-section {
        padding: 0.65rem;
    }

    .lb-stat-explorer .lb-se-control-grid,
    .lb-stat-explorer .lb-se-result-grid {
        grid-template-columns: 1fr;
    }

    .lb-stat-explorer .lb-se-field-wide {
        grid-column: auto;
    }

    .lb-stat-explorer .lb-se-chart-card {
        padding: 0.45rem;
    }

    .lb-stat-explorer .lb-se-chart {
        min-height: 230px;
    }
}

@media (max-width: 520px) {
    .lb-stat-explorer .lb-se-tab-label {
        display: none;
    }

    .lb-stat-explorer .lb-se-tab-label-short {
        display: inline;
    }

    .lb-stat-explorer .lb-se-heading h2 {
        font-size: 1.25rem;
    }

    .lb-stat-explorer .lb-se-section-heading {
        gap: 0.5rem;
    }

    .lb-stat-explorer .lb-se-step {
        flex-basis: 25px;
        width: 25px;
        height: 25px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .lb-stat-explorer *,
    .lb-stat-explorer *::before,
    .lb-stat-explorer *::after {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}