:root {
  --bg: oklch(0.975 0.006 80);
  --bg-2: oklch(0.955 0.010 75);
  --bg-3: oklch(0.935 0.014 72);
  --ink: oklch(0.205 0.012 60);
  --ink-2: oklch(0.355 0.012 60);
  --ink-3: oklch(0.520 0.010 65);
  --ink-4: oklch(0.720 0.008 70);
  --rule: oklch(0.880 0.010 70);
  --rule-2: oklch(0.820 0.012 68);
  --accent: oklch(0.545 0.045 55);
  --accent-soft: oklch(0.930 0.018 60);
  --accent-ink: oklch(0.380 0.040 55);
  --ink-hover: oklch(0.280 0.012 60);
  --success: oklch(0.510 0.080 145);
  --sans: "Geist", ui-sans-serif, -apple-system, system-ui, sans-serif;
  --serif: "Instrument Serif", ui-serif, Georgia, serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --max: 1240px;
  --pad: clamp(20px, 4vw, 56px);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: oklch(0.175 0.010 65);
  --bg-2: oklch(0.220 0.012 65);
  --bg-3: oklch(0.275 0.014 65);
  --ink: oklch(0.930 0.006 80);
  --ink-2: oklch(0.780 0.008 78);
  --ink-3: oklch(0.650 0.010 76);
  --ink-4: oklch(0.470 0.010 75);
  --rule: oklch(0.330 0.012 70);
  --rule-2: oklch(0.420 0.014 70);
  --accent: oklch(0.690 0.052 58);
  --accent-soft: oklch(0.280 0.032 58);
  --accent-ink: oklch(0.820 0.046 62);
  --ink-hover: oklch(0.860 0.008 80);
  --success: oklch(0.700 0.090 145);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body, #root { min-height: 100%; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); }
html { scroll-behavior: smooth; transition: background .25s ease, color .25s ease; }
body { font-size: 16px; line-height: 1.55; font-weight: 400; letter-spacing: -.005em; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
.academy-shell { min-height: 100vh; }
.topbar { position: sticky; top: 0; z-index: 20; min-height: 72px; display: flex; align-items: center; border-bottom: 1px solid var(--rule); background: color-mix(in oklch, var(--bg) 82%, transparent); backdrop-filter: saturate(150%) blur(14px); }
.topbar-inner { width: min(1440px, 100%); padding-inline: var(--pad); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo { width: 34px; height: 34px; display: grid; place-items: center; overflow: hidden; border-radius: 50%; border: 1px solid var(--rule); background: var(--bg); }
.brand-logo img { width: 100%; height: 100%; display: block; object-fit: cover; }
.brand .brand-mark { letter-spacing: .05em; font-size: 17px; font-weight: 500; }
.brand .brand-tag { color: var(--ink-3); font-family: var(--serif); font-size: 15px; font-style: italic; }
.top-actions { display: flex; align-items: center; gap: 10px; }
.user-email { color: var(--ink-3); font-size: 13px; }
.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--pad); }
.eyebrow { color: var(--ink-3); font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .12em; }
.hero-eyebrow { margin-bottom: 28px; display: flex; align-items: center; gap: 14px; }
.hero-eyebrow::before { content: ""; width: 10px; height: 10px; flex: 0 0 auto; border-radius: 50%; background: var(--accent); }
.display { max-width: 18ch; margin: 0; font-size: clamp(40px, 6.2vw, 84px); line-height: 1.02; letter-spacing: -.028em; font-weight: 400; }
.display em { position: relative; top: .075em; font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
.serif-em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
.lede { max-width: 60ch; color: var(--ink-2); font-size: clamp(17px, 1.35vw, 19px); line-height: 1.55; letter-spacing: -.005em; }
.btn { min-height: 44px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid var(--rule-2); border-radius: 999px; background: transparent; color: var(--ink); text-decoration: none; cursor: pointer; transition: .2s ease; }
.btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-primary { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--ink-hover); }
.btn-small { min-height: 36px; padding: 0 13px; font-size: 13px; }
.btn:disabled { cursor: not-allowed; opacity: .55; transform: none; }
.theme-toggle { height: 36px; min-width: 72px; padding: 0 10px; display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--rule-2); border-radius: 999px; background: var(--bg-2); color: var(--ink-2); font: 10.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; cursor: pointer; transition: background .25s ease, border-color .25s ease, color .25s ease; }
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }
.theme-toggle-track { width: 26px; height: 14px; padding: 2px; display: inline-flex; align-items: center; flex-shrink: 0; border: 1px solid var(--rule-2); border-radius: 999px; }
.theme-toggle-thumb { width: 8px; height: 8px; border-radius: 999px; background: var(--accent); transition: transform .25s ease, background .25s ease; }
:root[data-theme="dark"] .theme-toggle-thumb { transform: translateX(12px); }
.preview-banner { padding: 9px 20px; background: var(--accent-soft); color: var(--accent-ink); text-align: center; font: 11px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.login-page { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr); }
.login-story { padding: clamp(56px, 8vw, 110px); display: flex; flex-direction: column; justify-content: space-between; background: var(--bg); }
.login-copy { max-width: 720px; }
.login-copy p { max-width: 60ch; margin: 26px 0 0; color: var(--ink-2); font-size: clamp(17px, 1.35vw, 19px); line-height: 1.55; }
.promise-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 60px; background: var(--rule); border: 1px solid var(--rule); }
.promise { padding: 22px; background: var(--bg-2); }
.promise b { display: block; margin-bottom: 5px; font-weight: 500; }
.promise span { color: var(--ink-3); font-size: 14px; }
.login-panel { padding: clamp(36px, 7vw, 96px); display: flex; align-items: center; border-left: 1px solid var(--rule); background: var(--bg-2); }
.login-card { width: min(420px, 100%); margin: auto; }
.login-brand { margin-bottom: 64px; }
.login-card h2 { margin: 0 0 12px; font-size: 30px; letter-spacing: -.025em; font-weight: 500; }
.login-card > p { color: var(--ink-3); margin: 0 0 36px; }
.field { display: grid; gap: 8px; margin-bottom: 18px; }
.field label { font: 11px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: .1em; }
.field input { width: 100%; padding: 14px 0; border: 0; border-bottom: 1px solid var(--rule-2); outline: 0; background: transparent; color: var(--ink); }
.field input:focus { border-color: var(--ink); }
.login-card .btn { width: 100%; justify-content: center; }
.form-note, .form-error, .form-success { margin: 16px 0 0; font-size: 13px; }
.form-note { color: var(--ink-3); }
.form-error { color: oklch(0.55 .16 28); }
.form-success { color: var(--success); }
.preview-entry { margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--rule); }
.dashboard-hero { padding-top: clamp(56px, 8vw, 96px); padding-bottom: clamp(64px, 7vw, 96px); }
.dashboard-hero .hero-fin { margin: 22px 0 0; color: var(--ink-3); font-size: clamp(18px, 1.6vw, 22px); }
.dashboard-hero .hero-lede { margin: 26px 0 0; }
.dashboard-hero .hero-cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.dashboard-hero .hero-cta .btn { height: 48px; padding-inline: 22px; }
.journey-rail { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: clamp(48px, 6vw, 72px); border: 1px solid var(--rule); border-radius: 16px; overflow: hidden; }
.journey-stage { min-height: 80px; padding: 14px 16px; display: flex; flex-direction: column; justify-content: space-between; gap: 10px; background: var(--bg-2); border-right: 1px solid var(--rule); }
.journey-stage:last-child { border-right: 0; }
.journey-stage span { color: var(--accent-ink); font: 11px var(--mono); }
.journey-stage strong { font-size: 14px; font-weight: 500; }
.catalog { padding-top: 0; padding-bottom: 100px; }
.path-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.path-filter button { min-height: 36px; padding: 0 14px; border: 1px solid var(--rule-2); border-radius: 999px; background: transparent; color: var(--ink-2); font: 11px var(--mono); cursor: pointer; }
.path-filter button:hover, .path-filter button.active { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.course-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 20px; }
.course-card { grid-column: span 4; min-height: 540px; padding: 28px; border: 1px solid var(--rule); border-radius: 20px; background: var(--bg-2); display: flex; flex-direction: column; position: relative; overflow: hidden; }
.course-card:first-child { grid-column: span 4; }
.course-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 5px; background: var(--accent); opacity: .8; }
.course-card[data-accent="sage"]::before { background: oklch(.58 .06 145); }
.course-card[data-accent="blue"]::before { background: oklch(.58 .06 235); }
.course-cover { height: 210px; margin: -28px -28px 28px; overflow: hidden; border-bottom: 1px solid var(--rule); background: var(--bg-3); }
.course-card:first-child .course-cover { height: 210px; }
.course-cover img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .6s ease; }
.course-card:hover .course-cover img { transform: scale(1.018); }
.course-card .eyebrow { margin-bottom: 24px; }
.course-card h2 { margin: 0 0 16px; font-size: clamp(26px, 3vw, 38px); line-height: 1.08; letter-spacing: -.028em; font-weight: 400; }
.course-card p { margin: 0; color: var(--ink-2); }
.course-path { width: 100%; margin-bottom: 14px; color: var(--ink-3); font: 9px var(--mono); text-transform: uppercase; letter-spacing: .06em; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 12px; }
.course-path span, .course-path strong { padding: 5px 8px; border: 1px solid var(--rule); border-radius: 999px; }
.course-path strong { color: var(--ink); font-weight: 600; }
.course-outcome { margin-top: 20px; padding: 14px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.course-outcome span, .sidebar-result span, .exercise-deliverable span { display: block; margin-bottom: 5px; color: var(--ink-3); font: 10px var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.course-outcome strong, .sidebar-result strong, .exercise-deliverable strong { display: block; font-size: 14px; line-height: 1.4; font-weight: 500; }
.course-meta { display: flex; gap: 16px; margin: 18px 0 0; color: var(--ink-3); font: 11px var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.course-card-footer { margin-top: auto; padding-top: 34px; }
.progress-track { height: 4px; border-radius: 99px; overflow: hidden; background: var(--rule); }
.progress-bar { height: 100%; background: var(--accent); transition: width .35s ease; }
.progress-label { display: flex; justify-content: space-between; margin: 9px 0 18px; color: var(--ink-3); font: 11px var(--mono); }
.course-layout { width: min(1320px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 320px minmax(0, 1fr); gap: clamp(36px, 6vw, 90px); padding: 48px 0 100px; }
.course-sidebar { position: sticky; top: 120px; align-self: start; max-height: calc(100vh - 145px); overflow-y: auto; padding-right: 10px; }
.back-link { display: inline-block; margin-bottom: 36px; border: 0; padding: 0; background: none; color: var(--ink-3); cursor: pointer; }
.course-sidebar h1 { margin: 0 0 14px; font-size: 25px; line-height: 1.14; letter-spacing: -.02em; font-weight: 500; }
.sidebar-cover { width: 100%; aspect-ratio: 16 / 9; display: block; object-fit: cover; border-radius: 14px; border: 1px solid var(--rule); margin: -12px 0 24px; }
.course-sidebar > p { color: var(--ink-3); font-size: 14px; }
.sidebar-result { margin: 20px 0 0; padding: 14px; border: 1px solid var(--rule); border-radius: 12px; background: var(--bg-2); }
.course-resources { margin-top: 28px; }
.resource-card { padding: 16px; border: 1px solid var(--rule); border-radius: 12px; background: var(--bg-2); }
.resource-card strong { display: block; font-size: 14px; font-weight: 500; }
.resource-card p { margin: 6px 0 14px; color: var(--ink-3); font-size: 12px; line-height: 1.45; }
.resource-card .btn { width: 100%; }
.module { margin-top: 32px; }
.module-title { margin-bottom: 9px; color: var(--ink-3); font: 11px var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.lesson-link { width: 100%; display: grid; grid-template-columns: 22px 1fr auto; gap: 10px; align-items: start; padding: 12px 0; border: 0; border-top: 1px solid var(--rule); background: none; color: var(--ink-2); text-align: left; cursor: pointer; }
.lesson-link.active { color: var(--ink); }
.lesson-status { width: 18px; height: 18px; border: 1px solid var(--rule-2); border-radius: 50%; display: grid; place-items: center; font-size: 11px; }
.lesson-status.done { border-color: var(--success); background: var(--success); color: var(--bg); }
.lesson-minutes { color: var(--ink-3); font: 10px var(--mono); }
.lesson { max-width: 780px; }
.mobile-course-tools { display: none; }
.lesson-head { padding: 26px 0 54px; border-bottom: 1px solid var(--rule); }
.lesson-head h1 { margin: 14px 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.04; letter-spacing: -.035em; font-weight: 400; }
.lesson-head p { max-width: 620px; margin: 0; color: var(--ink-2); font-size: 18px; }
.lesson-content { padding: 30px 0; }
.content-block { margin: 44px 0; }
.content-block h2 { margin: 0 0 16px; font-size: 25px; letter-spacing: -.02em; font-weight: 500; }
.content-block p { color: var(--ink-2); font-size: 17px; line-height: 1.72; }
.lead-block p { font-family: var(--serif); font-size: clamp(25px, 3vw, 34px); line-height: 1.32; color: var(--ink); }
.lesson-image { margin-inline: 0; }
.lesson-image img { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 16px; border: 1px solid var(--rule); }
.lesson-image figcaption { margin-top: 10px; color: var(--ink-3); font: 11px/1.5 var(--mono); }
.callout { padding: 24px 26px; border-left: 3px solid var(--accent); background: var(--bg-2); border-radius: 0 14px 14px 0; }
.callout h2 { font-size: 17px; }
.callout p { margin-bottom: 0; font-size: 15px; }
.visual-flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(125px, 1fr)); border: 1px solid var(--rule); border-radius: 16px; overflow: hidden; }
.visual-step { min-height: 120px; padding: 20px; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--rule); background: var(--bg-2); }
.visual-step:last-child { border: 0; }
.visual-step span:first-child { color: var(--accent-ink); font: 11px var(--mono); }
.step-list { display: grid; gap: 14px; }
.step-item { display: grid; grid-template-columns: 34px 1fr; gap: 16px; padding: 20px 0; border-top: 1px solid var(--rule); }
.step-number { font-family: var(--serif); font-size: 26px; color: var(--accent-ink); }
.step-item b { display: block; margin-bottom: 5px; font-weight: 500; }
.step-item p { margin: 0; font-size: 15px; }
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checklist li { display: grid; grid-template-columns: 22px 1fr; gap: 12px; color: var(--ink-2); }
.checklist li::before { content: "✓"; color: var(--success); }
.prompt-box { position: relative; padding: 26px; border: 1px solid var(--rule); border-radius: 16px; background: var(--ink); color: var(--bg); }
.prompt-box pre { margin: 0; white-space: pre-wrap; font: 13px/1.7 var(--mono); }
.copy-btn { position: absolute; top: 12px; right: 12px; border: 1px solid color-mix(in oklch, var(--bg) 30%, transparent); border-radius: 999px; padding: 7px 10px; background: transparent; color: var(--bg); font: 10px var(--mono); cursor: pointer; }
.exercise-block { padding: 26px; border: 1px solid var(--accent); border-radius: 16px; background: var(--accent-soft); }
.exercise-block .eyebrow { color: var(--accent-ink); margin-bottom: 8px; }
.exercise-block > p { margin-bottom: 22px; }
.exercise-deliverable { padding: 14px; border-radius: 10px; background: var(--bg); }
.exercise-block .checklist { margin-top: 20px; }
.transfer-block { border-style: dashed; }
.example-block { padding: 26px; border: 1px solid var(--rule); border-radius: 16px; background: var(--bg-2); }
.example-block > .eyebrow, .handoff-block > .eyebrow { color: var(--accent-ink); margin-bottom: 8px; }
.example-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.example-grid > div { padding: 16px; border-radius: 10px; background: var(--bg); border: 1px solid var(--rule); }
.example-grid > div:last-child { border-color: var(--accent); background: var(--accent-soft); }
.example-grid span { display: block; margin-bottom: 8px; color: var(--ink-3); font: 10px var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.example-grid p, .example-review { margin: 0; font-size: 15px !important; line-height: 1.6 !important; }
.example-review { margin-top: 14px; color: var(--ink-2); }
.handoff-block { padding: 26px; border: 1px solid var(--accent); border-radius: 16px; background: color-mix(in oklch, var(--accent-soft) 65%, var(--bg)); }
.handoff-block p { margin-bottom: 0; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.comparison-grid section { padding: 22px; border: 1px solid var(--rule); border-radius: 14px; background: var(--bg-2); }
.comparison-grid h3 { margin: 8px 0 10px; font-size: 19px; font-weight: 500; }
.comparison-grid p { margin: 0; font-size: 15px; }
.quiz-block { padding: 26px; border: 1px solid var(--rule); border-radius: 16px; background: var(--bg-2); }
.quiz-block > .eyebrow { margin-bottom: 8px; }
.quiz-options { display: grid; gap: 9px; }
.quiz-option { padding: 14px 16px; border: 1px solid var(--rule-2); border-radius: 10px; background: var(--bg); color: var(--ink); text-align: left; cursor: pointer; }
.quiz-option:hover:not(:disabled) { border-color: var(--ink); }
.quiz-option.correct { border-color: var(--success); background: color-mix(in oklch, var(--success) 12%, var(--bg)); }
.quiz-option.wrong { border-color: oklch(0.55 .16 28); }
.quiz-explanation { margin-bottom: 0; font-size: 15px !important; }
.lesson-feedback { margin: 32px 0; padding: 24px 0; border-top: 1px solid var(--rule); }
.lesson-feedback h2 { margin: 8px 0 16px; font-size: 22px; font-weight: 500; }
.lesson-feedback form { display: grid; gap: 12px; }
.rating-row { display: flex; gap: 8px; }
.rating-row .selected { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.lesson-feedback label { color: var(--ink-3); font: 11px var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.lesson-feedback textarea { width: 100%; resize: vertical; padding: 13px; border: 1px solid var(--rule-2); border-radius: 10px; background: var(--bg); color: var(--ink); font: 14px/1.5 var(--sans); }
.lesson-feedback textarea:focus { outline: 1px solid var(--ink); }
.lesson-footer { padding-top: 36px; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; gap: 16px; }
.empty-state { padding: 80px 0; }
.empty-state h2 { margin: 0 0 8px; font-size: 28px; font-weight: 500; }
.empty-state p { margin: 0; color: var(--ink-3); }
.academy-alert { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 24px; padding: 14px 18px; border: 1px solid oklch(0.65 .10 70); border-radius: 12px; background: var(--accent-soft); color: var(--accent-ink); font-size: 14px; }
.academy-alert p { margin: 0; }
.loading { min-height: 60vh; display: grid; place-items: center; color: var(--ink-3); }
@media (max-width: 900px) {
  .login-page { grid-template-columns: 1fr; }
  .login-story { min-height: auto; gap: 40px; }
  .promise-list { margin-top: 30px; }
  .login-panel { min-height: 600px; border-top: 1px solid var(--rule); border-left: 0; }
  .course-card, .course-card:first-child { grid-column: span 6; }
  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: static; max-height: none; padding-right: 0; }
  .course-sidebar .sidebar-cover, .course-sidebar > p, .course-sidebar .sidebar-result, .course-sidebar .course-resources, .course-sidebar .module { display: none; }
  .course-sidebar h1 { margin-bottom: 18px; }
  .mobile-course-tools { display: grid; gap: 10px; padding: 18px; margin-bottom: 32px; border: 1px solid var(--rule); border-radius: 14px; background: var(--bg-2); }
  .mobile-course-tools label { font-size: 12px; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
  .mobile-course-tools select { width: 100%; min-height: 44px; padding: 0 38px 0 12px; border: 1px solid var(--rule-2); border-radius: 10px; background: var(--bg); color: var(--ink); font: inherit; }
  .mobile-course-tools .btn { justify-self: start; }
  .journey-rail { grid-template-columns: 1fr 1fr; }
  .journey-stage { border-bottom: 1px solid var(--rule); }
}
@media (max-width: 620px) {
  .topbar-inner { padding-inline: var(--pad); }
  .wrap { padding-inline: var(--pad); }
  .course-layout { width: min(100% - 28px, 1180px); }
  .brand .brand-tag, .user-email { display: none; }
  .display { font-size: clamp(36px, 9vw, 56px); }
  .dashboard-hero .hero-cta { flex-direction: column; align-items: stretch; }
  .login-story, .login-panel { padding: 36px 24px; }
  .promise-list { grid-template-columns: 1fr; }
  .course-card, .course-card:first-child { grid-column: 1 / -1; min-height: 520px; }
  .course-cover, .course-card:first-child .course-cover { height: 210px; }
  .visual-flow { grid-template-columns: 1fr 1fr; }
  .visual-step:nth-child(2) { border-right: 0; }
  .visual-step { border-bottom: 1px solid var(--rule); }
  .visual-step:nth-last-child(-n+2) { border-bottom: 0; }
  .journey-rail, .comparison-grid { grid-template-columns: 1fr; }
  .example-grid { grid-template-columns: 1fr; }
  .journey-stage { border-right: 0; }
  .path-filter { flex-wrap: nowrap; margin-inline: calc(-1 * var(--pad)); padding-inline: var(--pad); overflow-x: auto; }
  .path-filter button { flex: 0 0 auto; }
  .lesson-footer { flex-direction: column; }
}

@media (max-width: 680px) {
  .theme-toggle { display: none; }
}

@media (max-width: 1320px) {
  .topbar { min-height: 64px; }
}