/* A quieter black-and-gold workspace shared by the two portals. */
.portal-layout .app { min-height: 100dvh; }
.portal-layout .topbar { min-height: 76px; padding: 16px 28px; gap: 14px; }
.portal-layout .brand { margin-right: auto; }
.portal-layout .brand small { margin-top: 5px; }
.portal-layout .tabbar { position: static; width: 100%; display: flex; flex-wrap: wrap; gap: 4px; padding: 10px 20px 0; border-bottom: 1px solid var(--line-soft); background: var(--bg-alt); }
.nav-intro { display: none; }
.nav-eyebrow { font-size: .65rem; letter-spacing: .16em; font-weight: 700; color: var(--gold); }
.nav-intro strong { font-size: .94rem; font-weight: 500; color: var(--muted); }
.portal-layout .navtab { text-align: left; padding: .7em 1em; border: 0; border-bottom: 2px solid transparent; border-radius: 0; white-space: nowrap; background: none; }
.portal-layout .navtab:hover { color: var(--text); }
.portal-layout .navtab.is-active { color: var(--text); background: none; border-bottom-color: var(--gold); }
.nav-label { display: flex; align-items: center; gap: 6px; }
.portal-layout .view { max-width: 1280px; min-width: 0; margin-left: auto; margin-right: auto; padding: 42px clamp(24px, 4vw, 64px) 80px; gap: 30px; }
.portal-layout .view > h1 { font-size: clamp(1.7rem, 3vw, 2.35rem); letter-spacing: -.035em; }
.portal-layout .view > .block { gap: 16px; }
.portal-layout .card { padding: 22px; border-color: var(--line-soft); border-radius: 16px; }
.portal-layout .row-card { gap: 24px; }
.portal-layout .row-card > div:first-child { min-width: 0; overflow-wrap: anywhere; }
.portal-layout .row-card .muted { margin-top: 6px; }
.portal-layout .tiles { gap: 16px; }
.portal-layout .tile { border-top: 1px solid var(--line); padding: 22px; gap: 12px; }
.portal-layout .tile strong { font-size: 1.8rem; }
.portal-layout .tile span { text-transform: none; letter-spacing: 0; line-height: 1.4; font-size: .85rem; }
.portal-layout .empty { padding: 26px 20px; background: transparent; border-style: solid; border-color: var(--line-soft); }
.portal-layout .btn { min-height: 42px; }
.portal-layout .block-head { gap: 16px; }
.portal-layout .class-tabs { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px; margin: 0; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-alt); }
.portal-layout .class-tabs .btn { flex: 1 0 auto; background: transparent; border-color: transparent; color: var(--muted); }
.portal-layout .class-tabs .selected { background: var(--surface-2); border-color: rgba(242,183,30,.35); color: var(--gold-hi); }
.portal-layout .view > .danger-zone { margin-top: 28px; padding-top: 24px; }
.portal-layout .toolbar { gap: 14px; }
.portal-layout .work { gap: 18px; }
.portal-layout .work header h3 { margin-bottom: 8px; }
.portal-layout .quick { gap: 12px; }
.portal-layout .dashboard-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.portal-layout .home-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.portal-layout .home-links .btn { padding: 18px 12px; white-space: normal; line-height: 1.4; }
.portal-layout .page-intro { color: var(--muted); margin-top: -18px; max-width: 65ch; }
.menu-toggle { display: none; }
.skip-content { position: fixed; top: -100px; left: 16px; z-index: 100; padding: 12px 18px; background: var(--gold); color: var(--bg); border-radius: 8px; }
.skip-content:focus { top: 10px; }

@media (max-width: 1100px) { .portal-layout .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 800px) {
  .portal-layout .topbar { padding: 12px 16px; min-height: 76px; flex-wrap: wrap; }
  .portal-layout .menu-toggle { display: inline-flex; font-size: .8rem; padding: 10px; }
  .portal-layout .brand strong { font-size: .9rem; }
  .portal-layout .brand img { width: 30px; }
  .portal-layout .tabbar { display: none; position: static; width: auto; padding: 18px 16px; border-right: 0; border-bottom: 1px solid var(--line); grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .portal-layout.navigation-open .tabbar { display: grid; }
  .portal-layout .nav-intro { grid-column: 1 / -1; padding: 4px 14px 12px; }
  .portal-layout .view { margin: 0; padding: 28px 18px 60px; gap: 26px; }
  .portal-layout .card { padding: 18px; }
  .portal-layout .tile { padding: 18px; }
  .portal-layout .row-card { flex-wrap: wrap; gap: 16px; }
  .portal-layout .row-end { justify-content: flex-start; }
  .portal-layout .class-tabs .btn { flex-basis: calc(50% - 8px); white-space: normal; line-height: 1.3; }
}
@media (max-width: 440px) {
  .portal-layout .topbar-actions { width: 100%; justify-content: flex-end; }
  .portal-layout .home-links { grid-template-columns: 1fr; }
  .portal-layout .tile strong { font-size: 1.5rem; }
  .portal-layout .tiles { gap: 10px; }
  .portal-layout .row-card { flex-direction: column; align-items: flex-start; }
}
.portal-layout .zoom-name-help summary { cursor: pointer; color: var(--muted); font-size: .82rem; padding: 8px 0; }
.portal-layout .zoom-name-help p { padding: 4px 0 8px; max-width: 70ch; }
.portal-layout .section-navigation .btn { max-width: 100%; white-space: normal; line-height: 1.4; }
.portal-layout .progress-summary { border-top: 1px solid var(--line); padding-top: 20px; }
.portal-layout .progress-summary > summary { cursor: pointer; font-weight: 600; color: var(--muted); padding: 10px 0 20px; }
/* the subject page's Lesson files tab (student-lessons.js) */
.lesson-files-card > summary { cursor: pointer; line-height: 1.6; }
.lesson-files-card > summary .fine { margin-left: 10px; }
.lesson-file-list { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.lesson-file-list li { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; min-width: 0; }
.lesson-file-list .chip { max-width: 100%; overflow-wrap: anywhere; }