:root {
    --source-deep-blue: #005f91;
    --source-warm: #f1f1e6;
    --source-accent: #FACA16;
    --source-red: #b9001b;
    --color-brand: var(--source-deep-blue);
    --color-brand-hover: #00496f;
    --color-brand-soft: #e6f3f9;
    --color-accent: var(--source-accent);
    --color-focus: #0077b6;
    --color-canvas: #f7f9fb;
    --color-surface: #fff;
    --color-surface-tinted: var(--source-warm);
    --color-surface-dark: #17212b;
    --color-heading: #122636;
    --color-text: #263746;
    --color-muted: #607181;
    --color-inverse: #fff;
    --color-border: #d8e0e6;
    --color-border-strong: #a9bac7;
    --color-success: #18734a;
    --color-success-soft: #e5f4ec;
    --color-warning: var(--source-accent);
    --color-warning-soft: #fff7cc;
    --color-error: var(--source-red);
    --color-error-soft: #fbe7ea;
    --radius-control: 8px;
    --radius-card: 12px;
    --radius-panel: 18px;
    --shadow-card: 0 10px 28px rgba(18, 38, 54, .08);
    --shadow-overlay: 0 22px 58px rgba(18, 38, 54, .16);
    --content-width: 1240px;
    --reading-width: 76ch;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--color-text); background: var(--color-canvas); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
a { color: var(--color-brand); text-underline-offset: .18em; }
a:hover { color: var(--color-brand-hover); }
h1, h2, h3, h4 { color: var(--color-heading); line-height: 1.18; letter-spacing: -.02em; }
.app-container { width: min(calc(100% - 2rem), var(--content-width)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 2000; top: .5rem; left: .5rem; padding: .75rem 1rem; color: var(--color-inverse); background: var(--color-surface-dark); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
.btn { min-height: 42px; border-radius: var(--radius-control); font-weight: 700; }
.btn-primary { --bs-btn-bg: var(--color-brand); --bs-btn-border-color: var(--color-brand); --bs-btn-hover-bg: var(--color-brand-hover); --bs-btn-hover-border-color: var(--color-brand-hover); --bs-btn-active-bg: var(--color-brand-hover); --bs-btn-active-border-color: var(--color-brand-hover); }
.btn-warning { --bs-btn-bg: var(--color-warning); --bs-btn-border-color: var(--color-warning); --bs-btn-color: #2d2108; --bs-btn-hover-color: #2d2108; }
.btn-danger { --bs-btn-bg: var(--color-error); --bs-btn-border-color: var(--color-error); }
.form-control, .form-select { min-height: 44px; border-color: var(--color-border-strong); border-radius: var(--radius-control); color: var(--color-text); }
.form-control:focus, .form-select:focus { border-color: var(--color-focus); box-shadow: 0 0 0 .22rem rgba(0, 119, 182, .18); }
.form-label { color: var(--color-heading); font-weight: 700; }
.form-text, small { color: var(--color-muted); }
.eyebrow { margin: 0 0 .4rem; color: var(--color-brand); font-size: .76rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }

.guest-body { background: var(--color-surface-dark); }
.guest-main { min-height: 100vh; }
.login-layout { display: grid; min-height: 100vh; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); }
.login-intro, .login-form-panel { display: flex; flex-direction: column; justify-content: center; padding: clamp(2rem, 7vw, 7rem); }
.login-intro { position: relative; overflow: hidden; color: rgba(255,255,255,.82); background: var(--color-brand); }
.login-intro::after { position: absolute; right: -8rem; bottom: -10rem; width: 28rem; height: 28rem; border: 4rem solid rgba(250,202,22,.18); border-radius: 50%; content: ""; }
.login-intro .eyebrow, .page-hero .eyebrow { color: var(--color-inverse); }
.login-intro h1 { max-width: 12ch; margin: .35rem 0 1rem; color: var(--color-inverse); font-size: clamp(2.5rem, 5vw, 5.2rem); }
.login-intro > p:not(.eyebrow) { max-width: 56ch; font-size: 1.08rem; }
.brand-mark, .nav-brand-mark { display: block; object-fit: contain; }
.brand-mark { width: 64px; height: 64px; margin-bottom: 2rem; border-radius: 14px; box-shadow: var(--shadow-overlay); }
.login-benefits { display: grid; gap: .65rem; margin: 1.4rem 0 0; padding: 0; list-style: none; }
.login-benefits li::before { margin-right: .65rem; color: var(--color-accent); content: "✓"; font-weight: 900; }
.login-form-panel { background: var(--color-surface); }
.login-form-panel > * { width: min(100%, 470px); margin-inline: auto; }
.login-form-panel h2 { margin-bottom: .4rem; font-size: clamp(1.8rem, 3vw, 2.7rem); }
.login-form-panel form { margin-top: 1.5rem; }

.app-header { position: sticky; z-index: 1030; top: 0; border-bottom: 1px solid var(--color-border); background: rgba(255,255,255,.97); }
.navbar { min-height: 72px; padding: .5rem 0; }
.navbar-brand { display: flex; align-items: center; gap: .65rem; color: var(--color-heading); font-weight: 850; }
.nav-brand-mark { width: 38px; height: 38px; flex: 0 0 auto; border-radius: 9px; }
.navbar .nav-link { color: var(--color-text); font-weight: 650; }
.navbar .nav-link:hover { color: var(--color-brand); }
.navbar button.nav-link { border: 0; background: transparent; }
.navbar .dropdown-menu { min-width: 215px; padding: .5rem; border-color: var(--color-border); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.navbar .dropdown-item { min-height: 40px; padding: .55rem .7rem; border-radius: var(--radius-control); color: var(--color-text); font-weight: 650; }
.navbar .dropdown-item:hover, .navbar .dropdown-item:focus { color: var(--color-brand); background: var(--color-brand-soft); }
.account-navigation { padding-left: 1rem; border-left: 1px solid var(--color-border); }
.account-toggle { position: relative; display: grid; justify-items: end; padding: .25rem 1.1rem .25rem .5rem; line-height: 1.2; text-align: right; }
.account-toggle::after { position: absolute; right: -.55rem; top: 50%; }
.account-toggle span { font-weight: 800; }
.account-toggle small { font-size: .7rem; font-weight: 600; }
.account-summary { display: grid; padding: .5rem .7rem; line-height: 1.3; }
.account-summary small { color: var(--color-muted); }
.account-signout { color: var(--color-error) !important; }
.app-main { min-height: calc(100vh - 145px); padding-block: 2rem 4rem; }
.app-footer { padding: 1.25rem 0; color: rgba(255,255,255,.72); background: var(--color-surface-dark); font-size: .9rem; }
.app-footer .app-container { display: flex; justify-content: space-between; gap: 1rem; }
.app-alert { margin-bottom: 1.2rem; }

.page-hero { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 1.5rem; padding: clamp(1.7rem, 4vw, 3.2rem); border-radius: var(--radius-panel); color: rgba(255,255,255,.78); background: var(--color-brand); box-shadow: var(--shadow-card); }
.page-hero-warm { color: var(--color-text); background: var(--color-surface-tinted); box-shadow: none; }
.page-hero-warm .eyebrow { color: var(--color-brand); }
.page-hero h1 { max-width: 18ch; margin: .2rem 0 .6rem; color: var(--color-inverse); font-size: clamp(2rem, 4vw, 3.6rem); }
.page-hero-warm h1 { color: var(--color-heading); }
.page-hero p:last-child { max-width: 68ch; margin-bottom: 0; }
.page-heading, .content-header { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 1.5rem; }
.page-heading h1, .content-header h1 { margin: .2rem 0 .45rem; font-size: clamp(2rem, 4vw, 3.4rem); }
.page-heading p:last-child, .content-header p:last-child { max-width: 70ch; margin: 0; color: var(--color-muted); }
.header-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .55rem; }
.header-meta > span:not(.status-badge) { padding: .42rem .7rem; border: 1px solid var(--color-border); border-radius: var(--radius-control); background: var(--color-surface); font-size: .85rem; }
.header-meta > .progress-summary { border-color: #a8d6bf; color: var(--color-success); background: var(--color-success-soft); }
.progress-summary strong { color: inherit; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.stat { padding: 1.2rem 1.35rem; border-top: 4px solid var(--source-accent); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-card); }
.stat span { display: block; color: var(--color-muted); font-size: .78rem; font-weight: 750; }
.stat strong { display: block; margin-top: .4rem; color: var(--color-heading); font-size: 2rem; line-height: 1; }
.stat-success { border-top-color: var(--color-success); }
.stat-warning { border-top-color: var(--color-warning); }
.dashboard-grid { display: grid; grid-template-columns: 1.35fr .85fr; gap: 1.5rem; }
.content-section, .form-panel, .filter-panel, .confirm-panel { margin-top: 1.5rem; padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.tinted-section { border-color: transparent; background: var(--color-surface-tinted); }
.section-heading, .admin-card-heading { display: flex; align-items: start; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.section-heading h2, .admin-card-heading h2 { margin: 0; font-size: 1.4rem; }
.section-heading a { font-weight: 700; }
.empty-state, .state-panel { max-width: 820px; margin: 3rem auto; padding: clamp(2rem, 6vw, 4.5rem); border: 1px dashed var(--color-border-strong); border-radius: var(--radius-panel); background: var(--color-surface-tinted); text-align: center; }
.empty-state.compact { margin: 0; padding: 1.5rem; }
.empty-state h2, .empty-state h3, .state-panel h1 { margin-bottom: .65rem; }
.state-panel { margin-top: 8vh; }
.course-grid, .track-grid, .action-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.dashboard-course-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.dashboard-course-grid.single-course-grid { grid-template-columns: minmax(0, 1fr); }
.dashboard-course-grid.single-course-grid > .course-card { width: 100%; max-width: none; }
.course-grid-wide { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.course-card, .track-card { position: relative; min-width: 0; padding: 1.35rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.course-card::before { position: absolute; top: .85rem; left: 1.35rem; width: 3.5rem; height: 3px; border-radius: 999px; background: var(--color-brand); content: ""; }
.course-card-top { display: flex; justify-content: space-between; gap: .75rem; margin-bottom: .9rem; padding-top: .55rem; }
.course-id { color: var(--color-brand); font-size: .73rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.course-card h3, .track-card h2 { margin: 0 0 .6rem; font-size: 1.2rem; }
.course-card h3 a, .track-card h2 a { color: var(--color-heading); text-decoration: none; }
.course-card p, .track-card p { color: var(--color-muted); }
.course-meta { display: flex; gap: .8rem; padding-top: .75rem; border-top: 1px solid var(--color-border); color: var(--color-muted); font-size: .8rem; }
.track-list { display: grid; gap: .65rem; }
.track-row, .topic-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .95rem; border: 1px solid var(--color-border); border-radius: var(--radius-control); color: var(--color-text); background: var(--color-surface); text-decoration: none; }
.track-row span:first-child, .topic-row > span:nth-child(2) { display: grid; }
.track-row small, .topic-row small { color: var(--color-muted); }
.action-grid a { display: grid; gap: .35rem; padding: 1.3rem; border-left: 4px solid var(--color-accent); border-radius: var(--radius-control); color: var(--color-heading); background: var(--color-brand-soft); text-decoration: none; }
.action-grid span { color: var(--color-muted); }
.status-badge { display: inline-flex; align-items: center; padding: .3rem .55rem; border-radius: 999px; font-size: .72rem; font-weight: 800; }
.status-draft { color: var(--color-text); background: #e8edf1; }
.status-review { color: #2d2108; background: var(--color-warning-soft); }
.status-published { color: #0b5434; background: var(--color-success-soft); }
.status-archived { color: #861225; background: var(--color-error-soft); }
.notice { margin-block: 1rem; padding: 1rem 1.2rem; border-left: 5px solid var(--color-brand); border-radius: var(--radius-control); background: var(--color-brand-soft); }
.notice-warning { border-left-color: var(--color-warning); background: var(--color-warning-soft); }
.button-row { display: flex; flex-wrap: wrap; gap: .65rem; }
.app-breadcrumbs { margin-bottom: 1.4rem; font-size: .88rem; }
.learning-content { max-width: var(--reading-width); padding: clamp(1.3rem, 4vw, 3rem); border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-card); font-size: 1.04rem; line-height: 1.74; }
.learning-content.embedded-content { max-width: none; padding: 0; border: 0; box-shadow: none; }
.learning-content.help-content { max-width: none; }
.learning-content h1 { margin: 0 0 1.6rem; font-size: 2rem; }
.learning-content h2 { margin: 2.2rem 0 .9rem; padding-bottom: .45rem; border-bottom: 1px solid var(--color-border); font-size: 1.55rem; }
.learning-content h3 { margin: 1.7rem 0 .65rem; font-size: 1.25rem; }
.learning-content p, .learning-content li { max-width: var(--reading-width); }
.learning-content a { font-weight: 650; }
.learning-content code { padding: .12rem .32rem; border-radius: 5px; color: #7b2130; background: var(--color-error-soft); }
.learning-code { overflow-x: auto; padding: 1.2rem; border-radius: var(--radius-control); color: #ecf8ff; background: var(--color-surface-dark); }
.learning-code code { padding: 0; color: inherit; background: transparent; }
.learning-callout { margin: 1.4rem 0; padding: 1rem 1.2rem; border-left: 5px solid var(--color-accent); border-radius: var(--radius-control); background: var(--color-brand-soft); }
.learning-callout p:last-child { margin-bottom: 0; }
.learning-table { margin: 1.4rem 0; border: 1px solid var(--color-border); border-radius: var(--radius-control); }
.learning-table .table { margin: 0; }
.primary-navigation-section { margin-top: 0; padding: clamp(1rem, 2vw, 1.5rem); border-top: 3px solid var(--color-brand); }
.primary-navigation-section .section-heading p:last-child { margin: .35rem 0 0; color: var(--color-muted); }
.content-overview { margin-top: 1.5rem; }
.course-overview, .topic-overview { margin-bottom: 2rem; }
.content-overview .learning-content { max-width: none; padding: 1.25rem 1.5rem; border-color: transparent; background: var(--color-surface-tinted); box-shadow: none; }
.content-overview .learning-content > h1:first-child { display: none; }
.content-overview .learning-content > :last-child { margin-bottom: 0; }
.topic-list { display: grid; gap: .7rem; }
.topic-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; }
.topic-row:hover { border-color: var(--color-brand); background: var(--color-brand-soft); transform: translateY(-1px); }
.topic-summary { display: grid; min-width: 0; }
.topic-order, .lesson-number, .sequence-number { display: inline-grid; width: 2.6rem; height: 2.6rem; flex: 0 0 auto; place-items: center; border-radius: 50%; color: var(--color-brand); background: var(--color-brand-soft); font-size: .8rem; font-weight: 850; }
.topic-count { flex: 0 0 auto; color: var(--color-muted); font-size: .8rem; }
.topic-meta { display: flex; align-items: center; justify-content: end; gap: .75rem; }
.topic-action { color: var(--color-brand); font-size: 1.15rem; font-weight: 800; line-height: 1; }
.planning-disclosure { margin-top: 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.planning-disclosure > summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.1rem 1.25rem; color: var(--color-heading); cursor: pointer; list-style: none; }
.planning-disclosure > summary::-webkit-details-marker { display: none; }
.planning-disclosure > summary > span:first-child { display: grid; }
.planning-disclosure > summary small { margin-top: .15rem; font-weight: 400; }
.planning-disclosure > summary:hover { color: var(--color-brand); background: var(--color-brand-soft); }
.disclosure-icon::before { display: inline-grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; color: var(--color-brand); background: var(--color-brand-soft); content: "+"; font-size: 1.25rem; font-weight: 700; }
.planning-disclosure[open] .disclosure-icon::before { content: "−"; }
.planning-content { padding: 0 1.25rem 1.25rem; border-top: 1px solid var(--color-border); }
.planning-content .learning-content { padding-top: 1.25rem; }
.lesson-list { display: grid; gap: .65rem; padding: 0; list-style: none; }
.lesson-list a { display: flex; align-items: center; gap: 1rem; padding: .9rem; border: 1px solid var(--color-border); border-radius: var(--radius-control); color: var(--color-heading); text-decoration: none; }
.lesson-list a > span:nth-child(2) { display: grid; flex: 1; }
.lesson-layout { display: grid; grid-template-columns: 285px minmax(0, 1fr); gap: 1.5rem; align-items: start; }
.lesson-sidebar { position: sticky; top: 96px; max-height: calc(100vh - 120px); overflow-y: auto; padding: 1.2rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.lesson-nav h2 { margin-bottom: 1rem; font-size: 1rem; }
.lesson-nav ol { display: grid; gap: .35rem; margin: 0 0 1rem; padding: 0; list-style: none; }
.lesson-nav li a { display: grid; grid-template-columns: 2rem 1fr; gap: .5rem; padding: .65rem; border-radius: var(--radius-control); color: var(--color-text); text-decoration: none; font-size: .88rem; }
.lesson-nav li a span:first-child { color: var(--color-muted); font-weight: 800; }
.lesson-nav li a:hover, .lesson-nav li a.active { color: var(--color-brand); background: var(--color-brand-soft); }
.lesson-nav li a.active { box-shadow: inset 4px 0 0 var(--color-brand); font-weight: 750; }
.back-link { display: inline-block; padding-top: .75rem; border-top: 1px solid var(--color-border); font-size: .85rem; font-weight: 700; }
.lesson-main { min-width: 0; }
.lesson-header { display: flex; align-items: start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.lesson-header h1 { margin: .2rem 0 .65rem; font-size: clamp(1.9rem, 4vw, 3rem); }
.progress-control { min-width: 280px; padding: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.progress-control p { margin-bottom: .65rem; }
.progress-control .btn { margin: .2rem .2rem .2rem 0; }
.lesson-article { max-width: none; }
.previous-next { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.previous-next > div { display: grid; }
.previous-next a { font-weight: 750; }
.lesson-mobile-button { margin-bottom: 1rem; }
.sequence-list { display: grid; gap: 1rem; padding: 0; list-style: none; counter-reset: track-course; }
.sequence-list > li { display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; align-items: start; }
.sequence-list .course-card { max-width: 760px; }

.filter-panel { margin-bottom: 1.5rem; }
.search-page-form { display: grid; grid-template-columns: minmax(260px, 1fr) repeat(2, minmax(150px, .3fr)) auto; gap: .8rem; align-items: end; }
.inline-search { display: grid; grid-template-columns: 1fr auto; gap: .6rem; }
.result-summary { margin: 1rem 0; color: var(--color-muted); }
.search-results { display: grid; gap: .8rem; }
.search-result { padding: 1.2rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.search-result-heading { display: flex; justify-content: space-between; gap: 1rem; }
.search-result h2 { margin: .2rem 0; font-size: 1.25rem; }
.result-type { color: var(--color-brand); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.breadcrumbs-text { margin: .2rem 0 .55rem; color: var(--color-muted); font-size: .82rem; }
.form-grid, .assignment-forms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.compact-form { margin-bottom: 1.5rem; }
.compact-form h2 { margin-bottom: 1rem; font-size: 1.25rem; }
.admin-table-wrap { border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.admin-table { margin-bottom: 0; }
.admin-table thead th { color: var(--color-muted); background: #edf3f6; font-size: .75rem; letter-spacing: .05em; text-transform: uppercase; white-space: nowrap; }
.admin-table td > small, .admin-table td > strong { display: block; }
.admin-card-list { display: grid; gap: 1rem; }
.admin-card { padding: 1.3rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.admin-card.is-inactive { opacity: .72; }
.admin-card-heading p { margin: .35rem 0 0; color: var(--color-muted); }
.admin-card-actions { display: grid; gap: 1rem; padding-top: 1rem; border-top: 1px solid var(--color-border); }
.student-picks { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.student-picks a { padding: .45rem .7rem; border: 1px solid var(--color-border); border-radius: 999px; background: var(--color-surface); text-decoration: none; }
.student-picks small { margin-left: .2rem; }
.confirm-panel { max-width: 760px; margin: 5vh auto; }
.profile-layout { display: grid; grid-template-columns: minmax(300px, .75fr) minmax(0, 1.25fr); gap: 1.5rem; }
.profile-card, .profile-details { padding: clamp(1.3rem, 3vw, 2rem); border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.profile-card { display: grid; grid-template-columns: auto 1fr; gap: 1.1rem; align-content: start; align-items: center; }
.profile-card > .status-badge { grid-column: 1 / -1; justify-self: start; }
.profile-card h2 { margin: 0; }
.profile-card p:last-child { margin: .25rem 0 0; color: var(--color-muted); }
.profile-avatar { display: inline-grid; width: 64px; height: 64px; place-items: center; border-radius: 50%; color: var(--color-inverse); background: var(--color-brand); font-size: 1.5rem; font-weight: 850; }
.profile-details h2 { margin-bottom: 1rem; font-size: 1.35rem; }
.details-list { display: grid; gap: 0; margin: 0; }
.details-list > div { display: grid; grid-template-columns: minmax(120px, .35fr) 1fr; gap: 1rem; padding: .75rem 0; border-bottom: 1px solid var(--color-border); }
.details-list > div:last-child { border-bottom: 0; }
.details-list dt { color: var(--color-muted); font-size: .85rem; }
.details-list dd { margin: 0; color: var(--color-heading); font-weight: 650; }
.profile-stats { margin-top: 1.5rem; }
.progress-stats { max-width: 620px; grid-template-columns: repeat(2, 1fr); }
.progress-filter { display: grid; grid-template-columns: minmax(220px, 360px) auto; gap: .75rem; align-items: end; }
.progress-list { display: grid; gap: .8rem; }
.progress-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.2rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.progress-row h2 { margin: .45rem 0 .2rem; font-size: 1.15rem; }
.progress-row h2 a { color: var(--color-heading); text-decoration: none; }
.progress-row p { margin: 0; color: var(--color-muted); }
.progress-row time { flex: 0 0 auto; color: var(--color-muted); font-size: .82rem; }
.help-search-panel { display: grid; grid-template-columns: minmax(240px, .7fr) minmax(320px, 1.3fr); gap: 2rem; align-items: end; margin-bottom: 1.5rem; padding: clamp(1.5rem, 4vw, 2.5rem); border-radius: var(--radius-panel); color: var(--color-text); background: var(--color-surface-tinted); }
.help-search-panel h2 { margin: 0 0 .35rem; }
.help-search-panel p:last-child { margin: 0; color: var(--color-muted); }
.help-search-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .65rem; }
.help-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.help-grid article { padding: 1.4rem; border: 1px solid var(--color-border); border-radius: var(--radius-card); background: var(--color-surface); }
.help-grid h2 { font-size: 1.2rem; }
.help-grid p:last-child { margin: 0; color: var(--color-muted); }
.guide-disclosure { margin-top: 1rem; }
.guide-disclosure summary { padding: .85rem 1rem; border: 1px solid var(--color-border-strong); border-radius: var(--radius-control); color: var(--color-brand); background: var(--color-surface); cursor: pointer; font-weight: 750; }
.guide-disclosure[open] summary { margin-bottom: 1rem; }

@media (max-width: 1199.98px) {
    .course-grid-wide { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .navbar-collapse { padding: 1rem 0; }
    .account-navigation { margin-top: .75rem; padding: .75rem 0 0; border-top: 1px solid var(--color-border); border-left: 0; }
    .account-toggle { justify-items: start; width: 100%; text-align: left; }
    .account-toggle::after { position: static; }
    .account-menu { width: 100%; }
}

@media (max-width: 991.98px) {
    .login-layout { grid-template-columns: 1fr; }
    .login-intro { min-height: 44vh; }
    .login-intro::after { width: 18rem; height: 18rem; }
    .dashboard-grid, .lesson-layout, .profile-layout, .help-search-panel { grid-template-columns: 1fr; }
    .lesson-header { display: block; }
    .progress-control { min-width: 0; margin-top: 1rem; }
    .search-page-form { grid-template-columns: 1fr 1fr; }
    .search-page-form > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 767.98px) {
    .app-container { width: min(calc(100% - 1.25rem), var(--content-width)); }
    .app-main { padding-top: 1.25rem; }
    .page-hero, .page-heading, .content-header, .section-heading { display: block; }
    .page-hero .btn, .page-heading > .btn { margin-top: 1rem; }
    .stats-grid, .course-grid, .course-grid-wide, .track-grid, .action-grid, .form-grid, .assignment-forms, .help-grid { grid-template-columns: 1fr; }
    .topic-row { grid-template-columns: auto 1fr; }
    .topic-meta { grid-column: 2; justify-content: start; flex-wrap: wrap; }
    .learning-content { padding: 1.15rem; font-size: 1rem; }
    .learning-content h1 { font-size: 1.65rem; }
    .learning-content h2 { font-size: 1.35rem; }
    .search-page-form, .inline-search { grid-template-columns: 1fr; }
    .help-search-form, .progress-filter { grid-template-columns: 1fr; }
    .search-page-form > div:first-child { grid-column: auto; }
    .previous-next { grid-template-columns: 1fr; }
    .previous-next .text-end { text-align: left !important; }
    .app-footer .app-container { display: grid; }
    .progress-row { display: grid; }
}

@media (max-width: 575.98px) {
    .login-intro, .login-form-panel { padding: 2rem 1.25rem; }
    .login-intro h1 { font-size: 2.4rem; }
    .stats-grid { gap: .65rem; }
    .stat { padding: 1rem; }
    .lesson-list a { align-items: start; }
    .button-row .btn { width: 100%; }
    .course-card-top { align-items: start; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}