/* Stage 2 complete UI — public site, reader, workspace, and operations surfaces. */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

body { background: var(--l2l-canvas); }
.public-header {
  position: relative;
  z-index: 50;
  background: color-mix(in srgb, var(--l2l-surface) 94%, transparent);
  border-color: var(--l2l-border);
  box-shadow: 0 1px 0 rgb(8 26 51 / 3%);
  backdrop-filter: blur(18px);
}
.public-header .brandmark { color: var(--l2l-text); }
.public-header .brandmark strong { font-size: 17px; }
.public-header .outline {
  border-color: var(--l2l-border);
  border-radius: 999px;
  padding: 10px 16px;
  background: var(--l2l-surface-raised);
}
.public-nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.public-nav-links > li { display: flex; align-items: center; }
.public-header a { transition: color var(--l2l-motion-fast), background var(--l2l-motion-fast), transform var(--l2l-motion-fast); }
.public-header a:hover { color: var(--brand); }
.public-header .outline:hover { transform: translateY(-1px); text-decoration: none; }
.text-arrow { display: inline-flex; gap: 8px; align-items: center; font-weight: 800; text-decoration: none; }
.text-arrow span { transition: transform var(--l2l-motion-fast); }
.text-arrow:hover span { transform: translateX(4px); }

/* Authentic recovered homepage. */
.home-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 80% 30%, rgb(40 184 213 / 25%), transparent 28%),
    radial-gradient(circle at 10% 100%, rgb(240 164 59 / 14%), transparent 28%),
    linear-gradient(125deg, #081a33, #0e2b54 52%, #16457f);
}
.home-starfield {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  border-radius: 0;
  opacity: .58;
  background: #000;
}
.home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .16;
  background-image: linear-gradient(rgb(255 255 255 / 8%) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 8%) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 85%);
}
.home-hero-grid { min-height: 690px; display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(30px, 7vw, 90px); align-items: center; padding-block: 80px; }
.home-hero h1 { max-width: 760px; margin: 16px 0 22px; font-size: clamp(48px, 6vw, 82px); line-height: .99; letter-spacing: -.055em; }
.home-lead { max-width: 680px; color: #d4e5f8; font-size: clamp(16px, 2vw, 20px); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 46px; }
.public-button.primary { color: #fff; background: var(--l2l-brand-700); }
.public-button.primary:hover { color: #fff; background: var(--l2l-brand-800); }
.public-button.ghost { color: inherit; border: 1px solid currentColor; background: transparent; }
.home-hero .public-button.primary { color: #10284a; background: #fff; }
.home-hero .public-button.ghost { color: #fff; border-color: rgb(255 255 255 / 34%); }
.home-proof { display: flex; gap: clamp(24px, 5vw, 54px); margin: 0; }
.home-proof div { display: grid; gap: 2px; }
.home-proof dt { font-size: 28px; font-weight: 900; color: #fff; }
.home-proof dd { margin: 0; color: #aac5e4; font-size: 12px; }
.home-logo-stage { position: relative; display: grid; place-items: center; aspect-ratio: 1; margin: 0; }
.home-logo-stage::before { content: ""; position: absolute; inset: 13%; border-radius: 50%; background: #62bff833; filter: blur(34px); }
.home-logo-stage img { position: relative; z-index: 2; width: min(100%, 510px); aspect-ratio: 1; object-fit: cover; border-radius: 50%; box-shadow: 0 28px 90px #0008; }
.home-logo-stage .orbit { position: absolute; z-index: 3; width: 112%; height: 39%; border: 1px solid rgb(129 210 255 / 46%); border-radius: 50%; transform: rotate(-13deg); pointer-events: none; }
.home-logo-stage .orbit-two { width: 105%; transform: rotate(27deg); border-color: rgb(240 164 59 / 55%); }
.home-split { display: grid; grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr); gap: clamp(40px, 8vw, 110px); align-items: center; }
.home-split h2, .home-engineered h2, .home-final h2 { font-size: clamp(36px, 5vw, 64px); letter-spacing: -.045em; line-height: 1.06; }
.home-split > div > p:not(.eyebrow) { color: var(--l2l-text-muted); font-size: 17px; }
.check-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px 20px; padding: 0; margin: 28px 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; font-size: 14px; font-weight: 700; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--l2l-success); }
.authentic-media-card { overflow: hidden; margin: 0; border: 1px solid var(--l2l-border); border-radius: 26px; background: var(--l2l-surface); box-shadow: var(--l2l-shadow-lg); }
.authentic-media-card img { display: block; width: 100%; min-height: 360px; object-fit: cover; border-radius: 0; }
.authentic-media-card figcaption { padding: 12px 18px; color: var(--l2l-text-muted); }
.home-engineered { position: relative; overflow: hidden; padding: 140px 0; color: #fff; background: linear-gradient(120deg, #0e2b54, #1f5fa9); }
.home-engineered::after { content: "L2L"; position: absolute; right: -2vw; bottom: -8vw; font-size: min(30vw, 380px); font-weight: 950; color: rgb(255 255 255 / 4%); line-height: 1; }
.home-engineered h2 { max-width: 790px; margin: 12px 0 20px; }
.home-engineered h2 em { color: #70d9ee; font-style: normal; }
.home-engineered p:last-child { max-width: 650px; color: #c6daef; font-size: 17px; }
.home-split.career { grid-template-columns: 1.08fr .92fr; }
.gif-card img { image-rendering: auto; }
.home-final { padding: 120px 0; text-align: center; color: #fff; background: #081a33; }
.home-final h2 { margin: 12px 0; }
.home-final p { color: #adc5df; }
.home-final .public-button { margin-top: 20px; }
.public-footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; }
.public-footer-grid div:first-child { display: grid; }
.public-footer-links { display: flex; gap: 22px; margin: 0; padding: 0; list-style: none; }
.public-footer-grid small { grid-column: 1 / -1; color: #7890ad; }
.public-footer-credit { color: #d6e8ff !important; font-weight: 750; letter-spacing: .02em; }
.l2l-global-credit {
  display: flex;
  justify-content: center;
  gap: .45rem;
  padding: 14px 24px;
  color: #d6e8ff;
  background: #08182e;
  border-top: 1px solid rgb(143 197 255 / 18%);
  font-size: 12px;
  font-weight: 750;
  text-align: center;
}

/* Catalog, wiki, and course discovery. */
.catalog-results { padding-top: 52px; }
.catalog-search { margin-bottom: 10px; padding: 24px; border: 1px solid var(--l2l-border); border-radius: 18px; background: var(--l2l-surface); box-shadow: var(--l2l-shadow-sm); }
.catalog-search > label { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 850; color: var(--l2l-text); }
.catalog-search > div { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(170px, auto) auto; gap: 10px; }
.catalog-search input, .catalog-search select { min-height: 46px; border: 1px solid var(--l2l-border); border-radius: 10px; padding: 10px 13px; color: var(--l2l-text); background: var(--l2l-surface-raised); }
.catalog-search .public-button { border: 0; cursor: pointer; }
.catalog-count { margin: 15px 0 25px; color: var(--l2l-text-muted); font-size: 13px; }
.course-catalog-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.course-catalog-grid .course-card { display: flex; min-width: 0; flex-direction: column; overflow: hidden; padding: 0; background: var(--l2l-surface); transition: transform var(--l2l-motion-normal), box-shadow var(--l2l-motion-normal), border-color var(--l2l-motion-normal); }
.course-catalog-grid .course-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--brand) 45%, var(--l2l-border)); box-shadow: var(--l2l-shadow-lg); }
.course-catalog-grid .course-art { width: 100%; height: 205px; object-fit: contain; border-radius: 0; background: linear-gradient(135deg, var(--l2l-brand-900), var(--l2l-brand-600)); }
.course-card-content { display: flex; flex: 1; flex-direction: column; padding: 24px; }
.course-card-content h2 { margin: 8px 0; color: var(--l2l-text); }
.course-card-content p:not(.eyebrow) { display: -webkit-box; min-height: 66px; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.course-card-content .text-arrow { margin-top: auto; }
.course-art-fallback { display: grid; place-items: center; color: #fff; font-size: 28px; font-weight: 950; letter-spacing: -.08em; }
.public-empty { grid-column: 1 / -1; padding: 55px 25px; text-align: center; border: 1px dashed var(--l2l-border); border-radius: 18px; color: var(--l2l-text-muted); background: var(--l2l-surface); }
.public-empty strong { color: var(--l2l-text); font-size: 19px; }
.wiki-index h1 { margin: 8px 0; font-size: clamp(42px, 6vw, 68px); letter-spacing: -.045em; }
.wiki-intro { color: var(--l2l-text-muted); font-size: 17px; }
.wiki-search { margin-top: 35px; }
.wiki-search > div { grid-template-columns: 1fr auto; }
.wiki-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.wiki-card { display: flex; min-height: 250px; flex-direction: column; padding: 26px; border: 1px solid var(--l2l-border); border-radius: 16px; background: var(--l2l-surface); box-shadow: var(--l2l-shadow-sm); }
.wiki-card h2 { margin: 7px 0 10px; font-size: 21px; }
.wiki-card h2 a { color: var(--l2l-text); text-decoration: none; }
.wiki-card > p:not(.eyebrow) { color: var(--l2l-text-muted); }
.wiki-card .text-arrow { margin-top: auto; }
.course-overview { padding: 70px 0; background: var(--l2l-surface-soft); }
.course-overview-grid { display: grid; grid-template-columns: minmax(260px, 420px) 1fr; gap: clamp(35px, 7vw, 90px); align-items: center; }
.course-cover { overflow: hidden; aspect-ratio: 16 / 10; margin: 0; border: 1px solid var(--l2l-border); border-radius: 22px; background: linear-gradient(135deg, var(--l2l-brand-900), var(--l2l-brand-600)); box-shadow: var(--l2l-shadow-lg); }
.course-cover img { width: 100%; height: 100%; object-fit: contain; border-radius: 0; }
.course-cover span { display: grid; height: 100%; place-items: center; color: #fff; font-size: 54px; font-weight: 950; }
.course-overview h2 { margin: 8px 0 24px; font-size: clamp(32px, 4vw, 50px); line-height: 1.08; letter-spacing: -.04em; }
.course-facts { display: flex; flex-wrap: wrap; gap: 16px 42px; margin: 0 0 28px; }
.course-facts div { display: grid; }
.course-facts dt { font-size: 26px; font-weight: 900; color: var(--brand); }
.course-facts dd { margin: 0; color: var(--l2l-text-muted); font-size: 12px; }
.course-curriculum .public-wrap { max-width: 960px; }
.section-title h2 { margin-bottom: 30px; }
.assessment-title { margin-top: 68px; }
.course-module { border-color: var(--l2l-border); background: var(--l2l-surface); box-shadow: var(--l2l-shadow-sm); }
.course-module h3 { color: var(--l2l-text); background: var(--l2l-surface-soft); }
.course-module li { border-color: var(--l2l-border); }
.wiki-directory li { border-color: var(--l2l-border); }

/* Focused lesson and assessment reader. */
.lesson-outline-toggle { display: none; }
.lesson-sidebar { scrollbar-width: thin; border-color: var(--l2l-border); background: var(--l2l-surface-soft); }
.lesson-count { margin: -12px 10px 16px; color: var(--l2l-text-muted); font-size: 11px; }
.lesson-sidebar li { border-left: 3px solid transparent; }
.lesson-sidebar li:hover { background: color-mix(in srgb, var(--l2l-brand-600) 8%, transparent); }
.lesson-sidebar li.active { border-color: var(--brand); background: color-mix(in srgb, var(--l2l-brand-600) 14%, var(--l2l-surface)); }
.lesson-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 35px; color: var(--l2l-text-muted); font-size: 12px; }
.lesson-breadcrumb a { color: inherit; }
.lesson-main { max-width: 1180px; }
.lesson-main .prose { font-size: 16px; }
.lesson-main .prose h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.06; }
.lesson-main .prose img { border-radius: 12px; }
.lesson-resources { margin-top: 36px; padding: 22px; border: 1px solid var(--l2l-border); border-radius: 14px; background: var(--l2l-surface-soft); }
.lesson-resources h2 { margin-top: 0; }
.lesson-nav-link { border-color: var(--l2l-border); background: var(--l2l-surface); transition: border-color var(--l2l-motion-fast), transform var(--l2l-motion-fast); }
.lesson-nav-link:hover { transform: translateY(-2px); border-color: var(--brand); }

/* Application polish and authentic course media. */
.course-card .course-art { position: relative; overflow: hidden; }
.course-card .course-art > img { width: 100%; height: 100%; object-fit: contain; }
.course-card .course-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgb(6 18 35 / 60%), transparent 65%); pointer-events: none; }
.course-card .course-art-label { position: absolute; left: 16px; bottom: 14px; }
.loading-view { display: grid; justify-items: center; gap: 8px; color: var(--l2l-text-muted); }
.loading-view strong { color: var(--l2l-text); }
.loading-view small { font-size: 11px; }
.loading-orbit { width: 44px; height: 44px; margin-bottom: 8px; border: 3px solid var(--l2l-border); border-top-color: var(--primary); border-radius: 50%; animation: l2l-spin .8s linear infinite; }
@keyframes l2l-spin { to { transform: rotate(360deg); } }
.admin-hero { position: relative; display: flex; min-height: 190px; align-items: center; justify-content: space-between; overflow: hidden; margin-bottom: 22px; padding: 30px 35px; border-radius: 18px; color: #fff; background: linear-gradient(115deg, #0e2b54, #1f5fa9); }
.admin-hero h2 { margin: 6px 0; font-size: 28px; }
.admin-hero p:last-child { max-width: 650px; color: #c8def5; }
.admin-hero-mark { color: rgb(255 255 255 / 10%); font-size: 100px; font-weight: 950; letter-spacing: -.1em; }
.admin-grid { margin-top: 20px; }
.admin-grid .quick-link { justify-content: flex-start; }
.admin-grid .quick-link > span:nth-child(2) { display: grid; flex: 1; }
.admin-grid .quick-link small { margin-top: 3px; color: var(--l2l-text-muted); font-weight: 500; }
.profile-page-grid { display: grid; grid-template-columns: minmax(240px, .65fr) minmax(0, 1.35fr); gap: 20px; }
.profile-identity { padding: 35px; text-align: center; }
.profile-avatar-large { display: grid; width: 106px; height: 106px; place-items: center; margin: 0 auto 20px; border: 5px solid color-mix(in srgb, var(--primary) 18%, transparent); border-radius: 50%; color: #fff; background: linear-gradient(135deg, var(--l2l-brand-800), var(--l2l-cyan-500)); font-size: 38px; font-weight: 900; }
.profile-identity h2 { margin: 0; font-size: 24px; }
.profile-identity > p { color: var(--l2l-text-muted); overflow-wrap: anywhere; }
.profile-brand-note { display: flex; gap: 14px; align-items: center; margin-top: 35px; padding-top: 24px; border-top: 1px solid var(--l2l-border); text-align: left; }
.profile-brand-note .brand-symbol { display: block; width: 48px; height: 48px; flex: none; }
.profile-brand-note p { margin: 0; color: var(--l2l-text-muted); font-size: 11px; }
.profile-rule { margin: 30px 0; border: 0; border-top: 1px solid var(--l2l-border); }
.profile-menu small { display: block; padding: 0 14px 10px; color: var(--l2l-text-muted); text-transform: capitalize; }

/* Friendly server-rendered errors. */
.public-error-page main { display: grid; min-height: 100vh; place-items: center; padding: 25px; background: radial-gradient(circle at 50% 0, color-mix(in srgb, var(--l2l-brand-600) 16%, transparent), transparent 42%); }
.public-error-card { width: min(620px, 100%); padding: clamp(32px, 7vw, 70px); text-align: center; border: 1px solid var(--l2l-border); border-radius: 24px; background: var(--l2l-surface); box-shadow: var(--l2l-shadow-lg); }
.public-error-card .brandmark { justify-content: center; text-decoration: none; color: var(--l2l-text); }
.error-code { margin: 35px 0 0; color: var(--brand); font-size: 14px; font-weight: 900; letter-spacing: .2em; }
.public-error-card h1 { margin: 8px 0; font-size: clamp(34px, 6vw, 55px); letter-spacing: -.045em; }
.public-error-card > p:not(.error-code) { margin-bottom: 28px; color: var(--l2l-text-muted); }
.public-error-card > div { display: flex; justify-content: center; gap: 10px; }

[data-theme="dark"] .home-education,
[data-theme="dark"] .catalog-results,
[data-theme="dark"] .wiki-index,
[data-theme="dark"] .course-curriculum { background: var(--l2l-canvas); }
[data-theme="dark"] .course-card-content h2,
[data-theme="dark"] .wiki-card h2 a { color: var(--l2l-text); }
[data-theme="dark"] .public-button.ghost { color: var(--l2l-text); }
[data-theme="dark"] .lesson-sidebar li.active { background: color-mix(in srgb, var(--l2l-brand-600) 24%, var(--l2l-surface)); }

@media (max-width: 1050px) {
  .home-hero-grid { grid-template-columns: 1fr .7fr; }
  .course-catalog-grid, .wiki-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 850px) {
  .home-hero-grid, .home-split, .home-split.career, .course-overview-grid, .profile-page-grid { grid-template-columns: 1fr; }
  .home-logo-stage { width: min(500px, 85vw); margin: auto; }
  .home-split.career .gif-card { order: 2; }
  .lesson-outline-toggle { display: flex; position: sticky; top: 0; z-index: 40; width: 100%; justify-content: space-between; padding: 13px 20px; border: 0; border-bottom: 1px solid var(--l2l-border); color: var(--l2l-text); background: var(--l2l-surface-raised); font-weight: 800; }
  .lesson-sidebar { display: none; max-height: 55vh; }
  .lesson-sidebar.open { display: block; }
}

@media (max-width: 680px) {
  .public-header nav { align-items: flex-start; }
  .public-nav-links { width: 100%; gap: 8px 15px; flex-wrap: wrap; }
  .public-nav-links a:not(.outline), .public-header .public-edit-trigger { font-size: 12px; }
  .home-hero-grid { min-height: auto; padding-block: 65px; }
  .home-hero h1 { font-size: 48px; }
  .home-logo-stage { width: min(360px, 88vw); }
  .home-proof { gap: 18px; }
  .home-proof dt { font-size: 22px; }
  .check-list, .course-catalog-grid, .wiki-card-grid { grid-template-columns: 1fr; }
  .catalog-search > div, .wiki-search > div { grid-template-columns: 1fr; }
  .catalog-search button { width: 100%; }
  .authentic-media-card img { min-height: 230px; }
  .home-engineered, .home-final { padding: 85px 0; }
  .public-footer-grid { grid-template-columns: 1fr; }
  .public-footer-grid small { grid-column: auto; }
  .public-footer-links, .l2l-global-credit { flex-wrap: wrap; }
  .course-facts { gap: 15px 25px; }
  .public-error-card > div { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .loading-orbit { animation: none; border-top-color: var(--l2l-border); }
  .home-logo-stage .orbit { display: none; }
}