/* Layout revision v2 - pages with controlled width and reliable cache busting. */
:root {
    --ux-primary: #123f66;
    --ux-primary-strong: #0b2f4e;
    --ux-primary-soft: #eaf2f8;
    --ux-surface: #ffffff;
    --ux-background: #f3f6fa;
    --ux-border: #d8e2ec;
    --ux-text: #152f48;
    --ux-muted: #63778a;
    --ux-danger: #a52b2b;
    --ux-danger-soft: #fff2f2;
    --ux-success: #17663c;
    --ux-shadow: 0 16px 42px rgba(23, 54, 84, .08);
}

html { background: var(--ux-background); }
body.app-body { background: var(--ux-background); color: var(--ux-text); }

.ux-page {
    min-height: 100vh;
    background:
        radial-gradient(circle at 100% 0, rgba(18, 63, 102, .045), transparent 32rem),
        var(--ux-background);
}

.ux-shell {
    width: min(calc(100% - 48px), 1280px);
    margin: 0 auto;
    padding: 26px 0 56px;
}

.ux-shell--form { max-width: 840px; }
.ux-shell--narrow { max-width: 760px; }

.ux-brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.ux-brand-row .institutional-page-brand { margin: 0; }
.ux-brand-row .back-link { margin: 0; }

.ux-page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
    margin-bottom: 22px;
    padding: 24px 26px;
    border: 1px solid var(--ux-border);
    border-radius: 20px;
    background: rgba(255, 255, 255, .96);
    box-shadow: var(--ux-shadow);
}

.ux-page-header__copy { min-width: 0; }
.ux-eyebrow {
    display: inline-block;
    margin-bottom: 7px;
    color: #4e6780;
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .11em;
    text-transform: uppercase;
}

.ux-page-header h1 {
    margin: 0;
    color: var(--ux-primary-strong);
    font-size: clamp(1.75rem, 2.7vw, 2.35rem);
    line-height: 1.12;
}

.ux-page-header p {
    max-width: 760px;
    margin: 9px 0 0;
    color: var(--ux-muted);
    line-height: 1.55;
}

.ux-page-header__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
    flex-shrink: 0;
}

.ux-card {
    border: 1px solid var(--ux-border);
    border-radius: 18px;
    background: var(--ux-surface);
    box-shadow: var(--ux-shadow);
}

.ux-card + .ux-card { margin-top: 18px; }

.ux-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 24px;
    border-bottom: 1px solid #e5edf4;
}

.ux-card__header h2 { margin: 0; color: var(--ux-primary-strong); font-size: 1.15rem; }
.ux-card__header p { margin: 5px 0 0; color: var(--ux-muted); line-height: 1.45; }
.ux-card__body { padding: 24px; }

.ux-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.ux-metric {
    padding: 17px 19px;
    border: 1px solid var(--ux-border);
    border-radius: 16px;
    background: var(--ux-surface);
    box-shadow: 0 10px 28px rgba(23, 54, 84, .055);
}

.ux-metric span { display: block; color: var(--ux-muted); font-size: .78rem; font-weight: 700; }
.ux-metric strong { display: block; margin-top: 7px; color: var(--ux-primary-strong); font-size: 1.65rem; line-height: 1; }

.ux-filter-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.ux-filter-grid .ux-span-2 { grid-column: span 2; }
.ux-filter-grid .ux-span-all { grid-column: 1 / -1; }

.ux-filter-actions,
.ux-form-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 4px;
}

.ux-field { min-width: 0; }
.ux-field label {
    display: block;
    margin-bottom: 7px;
    color: #253f59;
    font-size: .82rem;
    font-weight: 800;
}

.ux-field .form-control,
.ux-field .form-select,
.ux-field input[type="text"],
.ux-field input[type="number"],
.ux-field input[type="search"],
.ux-field select {
    width: 100%;
    min-height: 44px;
}

.ux-field-help,
.ux-field .field-help {
    display: block;
    margin-top: 7px;
    color: #718397;
    font-size: .76rem;
    line-height: 1.45;
}

.ux-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}
.ux-form-grid .ux-span-all { grid-column: 1 / -1; }

.ux-checkbox-line {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 46px;
    padding: 11px 13px;
    border: 1px solid var(--ux-border);
    border-radius: 12px;
    background: #f8fafc;
}
.ux-checkbox-line label { margin: 0; }

.ux-table-wrap { overflow-x: auto; }
.ux-table { width: 100%; min-width: 960px; border-collapse: collapse; }
.ux-table th {
    padding: 12px 14px;
    background: #f1f5f9;
    color: #506579;
    border-bottom: 1px solid var(--ux-border);
    font-size: .7rem;
    letter-spacing: .055em;
    text-align: left;
    text-transform: uppercase;
    white-space: nowrap;
}
.ux-table td {
    padding: 15px 14px;
    border-bottom: 1px solid #e7edf3;
    color: #29445f;
    vertical-align: top;
}
.ux-table tbody tr:last-child td { border-bottom: 0; }
.ux-table tbody tr:hover td { background: #fbfdff; }

.ux-question-cell { min-width: 330px; max-width: 470px; }
.ux-question-cell p { margin: 6px 0 9px; line-height: 1.5; }
.ux-code { color: var(--ux-primary); font-size: .8rem; letter-spacing: .02em; }

.ux-badges { display: flex; flex-wrap: wrap; gap: 6px; }
.ux-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 999px;
    background: var(--ux-primary-soft);
    color: #265779;
    font-size: .68rem;
    font-weight: 800;
}

.ux-row-actions { display: flex; flex-wrap: wrap; gap: 8px 12px; }
.ux-pagination { display: flex; justify-content: center; align-items: center; gap: 10px; padding: 18px 22px 22px; }

.ux-danger-zone {
    margin-top: 18px;
    padding: 18px 20px;
    border: 1px solid #efcaca;
    border-radius: 15px;
    background: var(--ux-danger-soft);
}
.ux-danger-zone h2 { margin: 0; color: #7f1d1d; font-size: 1.05rem; }
.ux-danger-zone p { margin: 7px 0 15px; color: #7d4545; line-height: 1.5; }
.button-danger {
    border-color: var(--ux-danger) !important;
    background: var(--ux-danger) !important;
    color: #fff !important;
}
.button-danger-outline {
    border: 1px solid #c85f5f !important;
    background: #fff !important;
    color: #9a2525 !important;
}

.ux-dependency-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 16px 0;
}
.ux-dependency-item {
    padding: 12px 14px;
    border: 1px solid var(--ux-border);
    border-radius: 12px;
    background: #f8fafc;
}
.ux-dependency-item span { display: block; color: var(--ux-muted); font-size: .75rem; }
.ux-dependency-item strong { display: block; margin-top: 4px; font-size: 1.25rem; }

.ux-series-checkboxes ul,
.ux-series-checkboxes > div {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.ux-series-checkboxes li,
.ux-series-checkboxes > div > div {
    min-width: 0;
}
.ux-series-checkboxes label {
    display: flex !important;
    align-items: flex-start;
    gap: 9px;
    height: 100%;
    margin: 0 !important;
    padding: 11px 12px;
    border: 1px solid #d6e1eb;
    border-radius: 12px;
    background: #f8fafc;
    color: #29445f;
    cursor: pointer;
    font-size: .8rem;
    font-weight: 700;
    line-height: 1.35;
}
.ux-series-checkboxes label:hover { border-color: #94b6d1; background: #f3f8fc; }
.ux-series-checkboxes input[type="checkbox"] {
    width: 17px;
    height: 17px;
    margin: 1px 0 0;
    flex: 0 0 auto;
    accent-color: var(--ux-primary);
}

/* Reinforce previously centralised pages even when the legacy stylesheet is cached. */
.question-page .question-header,
.class-detail-page .class-detail-header,
.classes-page .classes-page-header {
    width: min(calc(100% - 48px), 1280px);
    margin: 0 auto;
}
.question-page .question-content,
.class-detail-page .class-detail-content,
.classes-page .classes-content {
    width: min(calc(100% - 48px), 1280px);
    max-width: 1280px;
    margin: 0 auto;
}
.question-page .question-content { max-width: 1120px; }

.institutional-page-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.institutional-page-brand__logo { width: 42px; height: 42px; object-fit: contain; }
.institutional-page-brand__text { display: flex; flex-direction: column; }
.institutional-page-brand__text strong { color: var(--ux-primary-strong); font-size: .85rem; }
.institutional-page-brand__text small { color: var(--ux-muted); font-size: .67rem; }

@media (max-width: 980px) {
    .ux-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ux-filter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ux-filter-grid .ux-span-2 { grid-column: span 2; }
    .ux-dependency-list { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .ux-shell { width: min(calc(100% - 24px), 1280px); padding-top: 14px; }
    .ux-brand-row { align-items: flex-start; flex-direction: column; }
    .ux-page-header { align-items: flex-start; flex-direction: column; padding: 20px; }
    .ux-page-header__actions { width: 100%; justify-content: flex-start; }
    .ux-filter-grid,
    .ux-form-grid { grid-template-columns: 1fr; }
    .ux-filter-grid .ux-span-2,
    .ux-filter-grid .ux-span-all,
    .ux-form-grid .ux-span-all { grid-column: auto; }
    .ux-card__header { flex-direction: column; }
    .ux-filter-actions,
    .ux-form-actions { justify-content: stretch; }
    .ux-filter-actions .button,
    .ux-form-actions .button { flex: 1 1 auto; text-align: center; }
    .ux-series-checkboxes ul,
    .ux-series-checkboxes > div { grid-template-columns: 1fr; }
    .question-page .question-header,
    .class-detail-page .class-detail-header,
    .classes-page .classes-page-header,
    .question-page .question-content,
    .class-detail-page .class-detail-content,
    .classes-page .classes-content { width: min(calc(100% - 24px), 1280px); }
}

@media (max-width: 480px) {
    .ux-metrics { grid-template-columns: 1fr; }
    .ux-page-header__actions,
    .ux-filter-actions,
    .ux-form-actions { flex-direction: column; align-items: stretch; }
}