/* Selected direction: UI A (blue classroom) with the interlocking brand mark. */
:root {
  --cd-brand: #245aef;
  --cd-brand-strong: #1948c8;
  --cd-brand-soft: #edf3ff;
  --cd-ink: #172940;
  --cd-muted: #5a6b82;
  --cd-line: #dfe7f0;
  --cd-soft: #f4f7fc;
  --cd-surface: #fff;
  --cd-radius: 14px;
  --cd-shadow: none;
  --cd-shadow-hover: 0 4px 16px rgba(23, 41, 64, .06);
  --brand: var(--cd-brand);
  --brand-dark: var(--cd-brand-strong);
  --ink: var(--cd-ink);
  --muted: var(--cd-muted);
  --line: var(--cd-line);
  --surface: var(--cd-surface);
  --soft: var(--cd-soft);
  --workspace-rail: 14.5rem;
}

.brand { gap: .6rem; font-size: 1.35rem; letter-spacing: -.045em; }
.brand-period { color: var(--cd-brand); }
.brand-mark {
  display: grid;
  place-content: center;
  width: 2rem;
  height: 2rem;
  overflow: hidden;
  filter: none;
  border-radius: 4px;
  background: #fff;
}
.brand-mark img { width: 2.9rem; height: 2.9rem; max-width: none; }
.skip-link { z-index: 100; }
.public-shell .nav { flex-direction: row; flex-wrap: nowrap; align-items: center; }
.public-shell .nav-actions { flex: 0 0 auto; width: auto; margin-left: auto; }
.nav-icon {
  width: 1.1rem;
  height: 1.1rem;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-links a { display: flex; align-items: center; gap: .65rem; }
.nav-links a > span:not(.badge) { min-width: 0; }
.nav-links a.active::after { display: none; }
.nav-actions .badge { margin-left: auto; border-radius: 5px; background: var(--cd-brand); }
.language-controls { display: flex; align-items: center; flex-wrap: wrap; gap: .65rem; }
.workspace-caption { margin-right: auto; font-size: .8rem; }
.language-switcher form { gap: .2rem; }
.language-switcher .link-button { min-height: 2.25rem; border-radius: 7px; padding: .3rem .65rem; }
.language-switcher .link-button.active { background: var(--cd-brand-soft); border-color: transparent; box-shadow: none; }
.main-content { padding-block: 2rem 3rem; }
.page-heading { align-items: flex-start; margin-bottom: 1.75rem; }
.page-heading h1 { font-size: clamp(1.65rem, 3vw, 2rem); font-weight: 750; line-height: 1.4; }
.eyebrow { line-height: 1.7; }
.card, .question-card, .management-card, .narrow-card { padding: 1.4rem; }
.card:hover { transform: none; }
.card:focus-within { outline: 2px solid var(--cd-brand); outline-offset: 3px; }
.card h2 { font-size: 1.13rem; line-height: 1.5; }
.card-meta { line-height: 1.7; }
.button, button[type="submit"]:not(.link-button) { box-shadow: none; }
.choice-field { gap: .7rem; padding: .85rem; border-radius: 9px; }
.choice-field:has(input:checked) { background: var(--cd-brand-soft); }
.choice-field input { flex: 0 0 1.1rem; width: 1.1rem; height: 1.1rem; }
.question-card { border-radius: var(--cd-radius); }
.assignment-response legend { font-size: 1.05rem; padding-inline: .5rem; }
.submission-status { background: var(--cd-surface); }
.back-link { color: var(--cd-muted); font-size: .85rem; }
.site-footer { font-size: .8rem; }

.dashboard-layout { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; gap: 1.75rem; align-items: start; }
.dashboard-main, .dashboard-rail { min-width: 0; }
.dashboard-main > .card-grid { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
.dashboard-priority-list .card { border-left-width: 1px; }
.dashboard-main > .card-grid > .card:first-child { border-top: 3px solid var(--cd-brand); }
.dashboard-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: .7rem; gap: .65rem 1.25rem; }
.dashboard-facts dt { font-size: .78rem; }
.dashboard-facts dd { font-size: .87rem; font-weight: 500; line-height: 1.7; }
.dashboard-card-footer { margin: .6rem 0 0; padding-top: .9rem; border-top: 1px solid var(--cd-line); text-align: right; color: var(--cd-brand-strong); font-size: .85rem; font-weight: 650; }
.dashboard-rail { display: grid; gap: 1.6rem; padding-top: .2rem; }
.dashboard-rail h2 { margin: 0 0 .7rem; font-size: .9rem; line-height: 1.6; }
.dashboard-rail .section-list { display: grid; gap: 0; padding: 0; }
.dashboard-rail .section-list li { display: block; min-width: 0; }
.dashboard-rail .section-list a { display: block; padding: .9rem 0; border: 0; border-bottom: 1px solid var(--cd-line); border-radius: 0; background: transparent; color: var(--cd-ink); font-size: .85rem; overflow-wrap: anywhere; }
.dashboard-rail .section-list a:hover { color: var(--cd-brand-strong); background: transparent; }
.dashboard-rail .section-list small { display: block; color: var(--cd-muted); font-size: .75rem; margin-top: .25rem; }
.dashboard-rail .guide-link { display: block; border-left: 2px solid var(--cd-brand); padding-left: .8rem; font-size: .85rem; line-height: 1.7; }
.dashboard-toolbar { display: flex; gap: .75rem; flex-wrap: wrap; margin: -1rem 0 1.5rem; font-size: .85rem; }

@media (min-width: 56rem) {
  .workspace-shell { padding-left: var(--workspace-rail); }
  .workspace-shell .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--workspace-rail);
    border-right: 1px solid var(--cd-line);
    border-bottom: 0;
    overflow-y: auto;
    box-shadow: none;
  }
  .workspace-shell .nav {
    width: 100%;
    min-height: 100dvh;
    padding: 1.75rem 1.15rem 1.25rem;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 2rem;
  }
  .workspace-shell .nav-actions { flex: 1; width: 100%; margin: 0; flex-direction: column; align-items: stretch; gap: 2rem; }
  .workspace-shell .nav-links { display: grid; flex: none; gap: .4rem; align-items: stretch; }
  .workspace-shell .nav-links a { padding: .7rem .75rem; white-space: normal; line-height: 1.5; font-size: .86rem; min-height: 2.75rem; border-radius: 8px; }
  .workspace-shell .nav-account { display: block; margin: auto 0 0; padding: 1rem 0 0; border: 0; border-top: 1px solid var(--cd-line); }
  .workspace-shell .account-menu summary { white-space: normal; line-height: 1.5; font-size: .8rem; min-height: 2.75rem; }
  .workspace-shell .account-menu-panel { position: static; width: 100%; min-width: 0; margin-top: .5rem; padding: .3rem; box-shadow: none; }
  .workspace-shell .account-menu-panel .link-button, .workspace-shell .account-menu-link { white-space: normal; font-size: .82rem; }
  .workspace-shell .account-menu-email { max-width: 100%; padding-inline: .3rem; font-size: .75rem; }
  .workspace-shell .language-bar { position: sticky; top: 0; z-index: 25; background: var(--cd-soft); padding: .4rem 0; }
  .workspace-shell .language-switcher { min-height: 3.2rem; width: calc(100% - 3.5rem); max-width: 76rem; }
  .workspace-shell .main-content, .workspace-shell .site-footer { width: calc(100% - 3.5rem); max-width: 76rem; }
  .workspace-shell .main-content { padding-top: 2.25rem; }
  .workspace-shell .submission-status { top: 4.5rem; z-index: 20; }
  .workspace-shell .grading-layout { grid-template-columns: minmax(0, 1fr) minmax(16rem, 21rem); }
}

@media (min-width: 56rem) and (max-width: 75rem) {
  .dashboard-layout { grid-template-columns: minmax(0, 1fr) 12rem; gap: 1.25rem; }
  .workspace-shell .grading-layout { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 55.99rem) {
  .site-header { position: static; box-shadow: none; }
  .workspace-shell .nav { flex-direction: column; align-items: stretch; gap: .85rem; padding-block: 1rem; }
  .workspace-shell .nav-actions { display: flex; flex-wrap: wrap; width: 100%; margin: 0; gap: .65rem; }
  .workspace-shell .nav-links { display: flex; flex-wrap: wrap; flex: 1 1 100%; gap: .25rem; }
  .workspace-shell .nav-links a { padding: .6rem .7rem; white-space: normal; font-size: .8rem; }
  .workspace-shell .nav-account { margin: 0; padding: 0; border: 0; font-size: .8rem; }
  .workspace-shell .account-menu summary { min-height: 2.75rem; }
  .workspace-shell .account-menu-panel { left: 0; right: auto; }
  .language-bar { padding: .5rem 0; }
  .language-switcher { justify-content: space-between; gap: .4rem; }
  .workspace-caption { font-size: .75rem; }
  .language-controls { font-size: .75rem; gap: .25rem; }
  .submission-status { position: static; }
  .dashboard-layout { grid-template-columns: minmax(0, 1fr); }
  .dashboard-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
}

@media (max-width: 38rem) {
  .container { width: calc(100% - 2rem); }
  .workspace-shell .nav-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  .workspace-shell .nav-links a { padding: .6rem; gap: .5rem; align-items: flex-start; }
  .workspace-shell .nav-icon { margin-top: .1rem; }
  .workspace-shell .nav-actions { align-items: stretch; }
  .brand { font-size: 1.4rem; }
  .main-content { padding-top: 1.5rem; }
  .card, .question-card, .management-card, .narrow-card { padding: 1rem; }
  .dashboard-facts { grid-template-columns: minmax(0, 1fr); }
  .dashboard-rail { grid-template-columns: minmax(0, 1fr); }
  .card .card-meta { flex-wrap: wrap; }
  .choice-field { padding: .75rem; }
}

/* UIA-01/02/06: reading layouts and controls that never cover editable content. */
.help-layout { max-width: 68rem; margin-inline: auto; }
.help-guides, .help-support { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; align-items: start; }
.help-topics { display: grid; gap: .75rem; margin-block: 1rem; }
.help-layout .card { display: block; box-shadow: none; }
.help-layout summary { min-height: 44px; cursor: pointer; }
.help-layout summary h2, .management-disclosure > summary h2, .management-disclosure > summary h3 { display: inline; margin: 0; font-size: 1.1rem; }
.help-layout .help-topic-body { max-width: 68ch; }
.help-layout ol { padding-left: 1.5rem; }
.help-layout li + li { margin-top: .55rem; }
.help-layout p { margin-block: .75rem; }
.help-topic[open] > summary, .help-guide[open] > summary { margin-bottom: .5rem; }
.help-topics-nav, .editor-toc { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0 0 1.25rem; }
.help-topics-nav a, .editor-toc a { display: inline-flex; align-items: center; min-height: 44px; padding: .45rem .75rem; border: 1px solid var(--line); border-radius: 8px; background: #fff; text-decoration: none; }
.help-layout [id], .editor-section, [data-search-results] { scroll-margin-top: 5.5rem; }
.form-actions { position: static; background: transparent; box-shadow: none; backdrop-filter: none; border: 0; border-top: 1px solid var(--line); border-radius: 0; padding: .85rem 0 0; }
.response-actions { position: static; background: #fff; padding: 1rem; border: 1px solid var(--line); border-radius: var(--cd-radius); }
.assignment-response textarea, .assignment-response input { scroll-margin-block: 18rem 3rem; }
button.button.secondary[type="submit"] { background: #fff; color: var(--cd-brand-strong); border-color: var(--line); }
button.button.secondary[type="submit"]:hover { background: var(--cd-brand-soft); border-color: var(--cd-brand); }
button.button.danger[type="submit"] { background: #fff1f0; color: #b42318; border-color: #f2b8b5; }
button.button.danger[type="submit"]:hover { background: #ffe4e1; }
.management-disclosure > summary { cursor: pointer; min-height: 44px; padding-block: .45rem; }
.management-disclosure[open] > summary { margin-bottom: .65rem; }
.management-disclosure:not([open]) { margin-bottom: 1rem; }
.management-grid { align-items: start; }
.editor-section > .stacked-form { max-width: 48rem; }
.policy-section .stacked-form { gap: .75rem; }
.policy-section .checkbox-field { margin: 0; }
.grading-answer .question-heading { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .4rem 1rem; }
.grading-answer .question-heading > strong, .grading-answer .question-heading > :last-child { grid-column: 1 / -1; }
.grading-answer .question-heading > * { min-width: 0; overflow-wrap: anywhere; }
.submission-history { margin-top: 2rem; }
.submission-history-entry { margin-block: .75rem; }
.submission-history-entry h3 { margin-top: 0; }
.history-answers summary { cursor: pointer; min-height: 44px; padding-block: .6rem; }
.notification-group-title { font-size: .95rem; margin: 1.5rem 0 .5rem; }
.notification-group .notification-list { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--cd-radius); overflow: hidden; }
.notification-group .notification-item { margin: 0; border-radius: 0; border: 0; border-bottom: 1px solid var(--line); padding: 1rem; }
.notification-group .notification-item:last-child { border-bottom: 0; }
.notification-actions button { min-height: 44px; }
.list-pagination { align-items: center; }
.nav-toggle[hidden], #workspace-navigation[hidden] { display: none !important; }
@media (max-width: 55.99rem) {
  .workspace-shell .nav { flex-direction: row; flex-wrap: wrap; align-items: center; padding-block: .5rem; gap: .5rem; }
  .workspace-shell .nav-toggle { margin-left: auto; min-height: 44px; padding: .45rem .75rem; }
  .workspace-shell .nav-actions { flex: 1 1 100%; }
  .workspace-shell .language-bar { padding: .15rem 0; }
  .workspace-shell .workspace-caption { display: none; }
  .workspace-shell .language-switcher { justify-content: flex-end; }
  .language-switcher .link-button { min-height: 44px; }
  .main-content { padding-top: 1rem; }
  .help-layout [id], .editor-section, [data-search-results] { scroll-margin-top: 1rem; }
  .assignment-response textarea, .assignment-response input { scroll-margin-top: 2rem; }
}
@media (max-width: 40rem) {
  .help-guides, .help-support { grid-template-columns: minmax(0, 1fr); }
  .help-layout .card { padding: 1rem; }
  .grading-answer .question-heading { grid-template-columns: minmax(0, 1fr); }
  .notification-group .notification-item { padding: .85rem; }
  .notification-actions { gap: .5rem; }
}

.policy-reminders { min-width: 0; padding: .5rem .75rem; border: 1px solid var(--line); border-radius: 8px; }
.policy-reminders > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .25rem .75rem; }
.policy-reminders legend { padding-inline: .35rem; font-weight: 600; }

@media (max-width: 40rem) { .policy-reminders > div { grid-template-columns: minmax(0, 1fr); } }