:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: rgba(255,255,255,.88);
  --panel-solid: #fff;
  --ink: #10203a;
  --muted: #5d6b80;
  --line: rgba(100,116,139,.22);
  --blue: #2563eb;
  --cyan: #0891b2;
  --violet: #7c3aed;
  --amber: #d97706;
  --green: #059669;
  --shadow: 0 24px 70px rgba(15,23,42,.10);
  --small-shadow: 0 10px 30px rgba(15,23,42,.08);
}

.atlas-hero { grid-template-columns: 1fr; min-height: 0; padding: 3.5rem 0; }
.atlas-hero h1 { max-width: 22ch; font-size: clamp(2.8rem,6vw,4.8rem); }
.atlas-hero .search-box { margin-top: 1.3rem; width: min(38rem,100%); }
.path-section { padding: 2.5rem 0; }

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(15,27,45,.88);
  --panel-solid: #0f1b2d;
  --ink: #ecf5ff;
  --muted: #aebcd0;
  --line: rgba(148,163,184,.22);
  --blue: #60a5fa;
  --cyan: #22d3ee;
  --violet: #a78bfa;
  --amber: #fbbf24;
  --green: #34d399;
  --shadow: 0 24px 70px rgba(0,0,0,.36);
  --small-shadow: 0 10px 30px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; background: var(--bg); }
body { margin: 0; overflow-x: hidden; background: radial-gradient(circle at 12% 2%, rgba(37,99,235,.12), transparent 25rem), radial-gradient(circle at 88% 10%, rgba(124,58,237,.10), transparent 26rem), var(--bg); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
.lang-es { display: none; }
html[data-lang="es"] .lang-en { display: none !important; }
html[data-lang="es"] .lang-es { display: inline !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; border-radius: .75rem; background: var(--ink); color: var(--bg); padding: .8rem 1rem; font-weight: 800; transition: top .2s; }
.skip-link:focus { top: 1rem; }
.focus-ring:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }

.site-header { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(18px); }
.header-inner { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; width: min(1180px, calc(100% - 2rem)); min-height: 4.5rem; margin: auto; }
.brand { display: inline-flex; align-items: center; gap: .65rem; border-radius: .8rem; text-decoration: none; }
.brand-mark { display: grid; width: 2.4rem; height: 2.4rem; place-items: center; border-radius: .8rem; background: #08111f; color: #67e8f9; font-size: .72rem; font-weight: 950; letter-spacing: -.02em; box-shadow: 0 10px 28px rgba(15,23,42,.2); }
.brand-copy { display: grid; gap: .05rem; line-height: 1.03; }
.brand-title { font-size: .87rem; font-weight: 950; letter-spacing: -.02em; }
.brand-subtitle { color: var(--muted); font-size: .7rem; font-weight: 750; }
.header-nav-wrap { position: relative; min-width: 0; }
.header-nav { display: flex; justify-content: center; gap: .35rem; }
.header-nav a, .site-footer nav a { border-radius: .65rem; color: var(--muted); padding: .55rem .7rem; font-size: .76rem; font-weight: 800; text-decoration: none; }
.header-nav a { white-space: nowrap; }
.header-nav a:hover, .site-footer nav a:hover { background: var(--panel); color: var(--ink); }
.nav-scroll-cue { display: none; }
.header-actions { display: flex; gap: .45rem; }
.icon-button, .language-button { display: inline-flex; min-height: 2.5rem; align-items: center; justify-content: center; gap: .45rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--panel); padding: 0 .7rem; cursor: pointer; font-size: .75rem; font-weight: 900; box-shadow: var(--small-shadow); }
.icon-button { min-width: 2.5rem; }
.language-button { min-width: 2.8rem; }
.control-label { white-space: nowrap; }

.atlas-hero { display: grid; grid-template-columns: minmax(0,1.08fr) minmax(22rem,.82fr); gap: clamp(2rem,5vw,5rem); align-items: center; width: min(1180px, calc(100% - 2rem)); min-height: calc(100vh - 4.5rem); margin: auto; padding: clamp(4rem,8vw,7.5rem) 0; }
.eyebrow, .section-kicker { margin: 0 0 .8rem; color: var(--blue); font-size: .72rem; font-weight: 950; letter-spacing: .09em; text-transform: uppercase; }
.status-dot { display: inline-block; width: .5rem; height: .5rem; margin-right: .5rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 .35rem rgba(5,150,105,.12); }
.atlas-hero h1 { max-width: 13ch; margin: 0; font-size: clamp(3rem,7.4vw,6.4rem); font-weight: 950; letter-spacing: -.075em; line-height: .94; }
.gradient-text { background: linear-gradient(100deg,#2563eb,#0891b2 45%,#7c3aed); -webkit-background-clip: text; background-clip: text; color: transparent; }
html[data-theme="dark"] .gradient-text { background-image: linear-gradient(100deg,#93c5fd,#67e8f9 45%,#c4b5fd); }
.hero-lede { max-width: 62ch; margin: 1.6rem 0 0; color: var(--muted); font-size: clamp(1rem,1.8vw,1.18rem); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem; margin-top: 2rem; }
.primary-button, .secondary-button { display: inline-flex; min-height: 3rem; align-items: center; justify-content: center; border-radius: .85rem; padding: .75rem 1rem; font-size: .82rem; font-weight: 900; text-decoration: none; }
.primary-button { background: var(--ink); color: var(--bg); box-shadow: var(--small-shadow); }
.secondary-button { border: 1px solid var(--line); background: var(--panel); }

.surface-map { position: relative; border: 1px solid var(--line); border-radius: 1.8rem; background: linear-gradient(145deg, var(--panel-solid), color-mix(in srgb, var(--panel-solid) 75%, var(--blue))); padding: 1rem; box-shadow: var(--shadow); }
.surface-map::before { position: absolute; inset: -.8rem; z-index: -1; border: 1px dashed color-mix(in srgb, var(--blue) 36%, transparent); border-radius: 2.2rem; content: ""; transform: rotate(1.2deg); }
.surface-map-head { padding: .75rem .75rem 1rem; color: var(--muted); font-size: .72rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.surface-lane { display: grid; width: 100%; grid-template-columns: 2.1rem minmax(0,1fr); gap: .8rem; align-items: center; margin-bottom: .65rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); padding: .85rem; color: var(--ink); text-align: left; cursor: pointer; transition: border-color .18s,transform .18s; }
.surface-lane:hover { border-color: var(--blue); transform: translateX(.2rem); }
.surface-lane[aria-pressed="true"] { border-color: var(--blue); box-shadow: 0 0 0 2px color-mix(in srgb,var(--blue) 28%,transparent); }
.surface-lane::after { grid-column: 2; height: .22rem; border-radius: 999px; background: var(--lane); content: ""; opacity: .8; }
.lane-index { grid-row: 1 / span 2; color: var(--muted); font-size: .65rem; font-weight: 950; }
.surface-lane .lane-copy { display: flex; justify-content: space-between; gap: .8rem; align-items: baseline; }
.surface-lane strong { font-size: .92rem; }
.surface-lane small, .lane-example { color: var(--muted); font-size: .66rem; }
.lane-example { grid-column: 2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lane-chat { --lane: linear-gradient(90deg,#10a37f,#d97706,#4285f4,#111827); }
.lane-builder { --lane: linear-gradient(90deg,#4285f4,#7c3aed,#111827); }
.lane-agent { --lane: linear-gradient(90deg,#111827,#d97706,#2563eb,#0ea5e9); }
.lane-control { --lane: linear-gradient(90deg,#7c3aed,#0891b2,#059669); }
.surface-note { margin: .9rem .75rem .5rem; color: var(--muted); font-size: .76rem; line-height: 1.55; }

@media (min-width: 981px) and (max-width: 1080px) {
  .surface-map::before { inset: -.35rem; transform: none; }
}

.path-section, .catalog-section, .lesson-shell { width: min(1180px, calc(100% - 2rem)); margin: auto; padding: clamp(4rem,7vw,6rem) 0; }
.path-section, .catalog-section, .lesson-shell { scroll-margin-top: 5.5rem; }
/* The shared header already reserves scroll-padding; do not double the lesson offset. */
.lesson-shell { scroll-margin-top: 0 !important; }
.mobile-scroll-cue { display: none; }
.path-section { border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(0,1fr) minmax(18rem,.6fr); gap: 2rem; align-items: end; margin-bottom: 1.8rem; }
.section-heading h2 { margin: 0; font-size: clamp(2rem,4.2vw,3.7rem); letter-spacing: -.055em; line-height: 1; }
.section-heading > p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.65; }
.path-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: .75rem; }
.path-card { display: grid; min-height: 11.5rem; grid-template-rows: auto 1fr auto; gap: .8rem; border: 1px solid var(--line); border-radius: 1.2rem; background: var(--panel); padding: 1rem; text-align: left; cursor: pointer; box-shadow: var(--small-shadow); transition: transform .18s,border-color .18s,background .18s; }
.path-card:hover { transform: translateY(-3px); border-color: var(--path-accent); }
.path-card[aria-pressed="true"] { border-color: var(--path-accent); background: color-mix(in srgb, var(--panel-solid) 90%, var(--path-accent)); box-shadow: 0 0 0 2px color-mix(in srgb, var(--path-accent) 30%, transparent); }
.path-icon { display: grid; width: 2.3rem; height: 2.3rem; place-items: center; border-radius: .75rem; background: color-mix(in srgb, var(--path-accent) 14%, var(--panel-solid)); color: color-mix(in srgb, var(--path-accent) 75%, #000); font-weight: 950; }
html[data-theme="dark"] .path-icon { color: color-mix(in srgb, var(--path-accent) 45%, #fff); }
.path-card strong { display: block; font-size: 1rem; letter-spacing: -.025em; }
.path-card p { margin: .35rem 0 0; color: var(--muted); font-size: .73rem; line-height: 1.5; }
.path-count { color: var(--muted); font-size: .66rem; font-weight: 850; text-transform: uppercase; }

.catalog-section { border-top: 1px solid var(--line); }
.catalog-heading { align-items: center; }
.catalog-tools { display: flex; gap: .8rem; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.search-box { display: flex; width: min(23rem,100%); align-items: center; gap: .55rem; border: 1px solid var(--line); border-radius: .9rem; background: var(--panel); padding: 0 .8rem; }
.search-box input { width: 100%; min-height: 2.8rem; border: 0; outline: 0; background: transparent; color: var(--ink); }
.family-filters { display: flex; gap: .4rem; overflow-x: auto; padding: .2rem; scrollbar-width: thin; }
.room-filter-row { display: flex; gap: .65rem; align-items: center; margin: -.1rem 0 1.2rem; }
.filter-label { color: var(--muted); font-size: .66rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.room-filters { display: flex; gap: .4rem; overflow-x: auto; padding: .2rem; scrollbar-width: thin; }
.filter-button { min-height: 2.45rem; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); padding: .55rem .8rem; white-space: nowrap; cursor: pointer; font-size: .7rem; font-weight: 850; }
.filter-button[aria-pressed="true"] { border-color: var(--blue); background: var(--ink); color: var(--bg); }
.tool-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .85rem; }
.tool-card { position: relative; display: grid; min-height: 20rem; grid-template-rows: auto auto 1fr auto; gap: 1rem; overflow: hidden; border: 1px solid var(--line); border-radius: 1.35rem; background: var(--panel); padding: 1.1rem; box-shadow: var(--small-shadow); }
.tool-card::before { position: absolute; inset: 0 0 auto; height: .3rem; background: var(--tool-accent); content: ""; }
.tool-card-head { display: flex; gap: .8rem; align-items: center; }
.tool-logo { display: grid; width: 3rem; height: 3rem; flex: 0 0 auto; place-items: center; border: 1px solid var(--line); border-radius: .9rem; background: #fff; }
.tool-logo img { width: 2rem; height: 2rem; object-fit: contain; }
.tool-logo .letter-logo { color: #0f172a; font-size: .95rem; font-weight: 950; }
.tool-meta { min-width: 0; }
.tool-family { color: var(--muted); font-size: .64rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.tool-name { margin: .18rem 0 0; font-size: 1.3rem; letter-spacing: -.035em; line-height: 1; }
.surface-badge { width: max-content; border: 1px solid var(--line); border-radius: 999px; padding: .35rem .55rem; color: var(--muted); font-size: .63rem; font-weight: 850; }
.tool-summary { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.62; }
.job-chips { display: flex; flex-wrap: wrap; gap: .35rem; align-content: start; }
.job-chip { border-radius: .5rem; background: color-mix(in srgb, var(--blue) 8%, var(--panel-solid)); color: var(--blue); padding: .35rem .45rem; font-size: .62rem; font-weight: 800; }
.open-tool { display: flex; width: 100%; min-height: 2.8rem; align-items: center; justify-content: space-between; border: 1px solid var(--line); border-radius: .85rem; background: var(--panel-solid); padding: .65rem .75rem; cursor: pointer; font-size: .74rem; font-weight: 900; }
.open-tool:hover { border-color: var(--blue); }
.empty-state { border: 1px dashed var(--line); border-radius: 1.2rem; padding: 2rem; color: var(--muted); text-align: center; }
.empty-state strong, .empty-state span { display: block; margin-bottom: .4rem; }
.reset-filters { min-height: 2.45rem; margin-left: auto; border: 1px solid var(--line); border-radius: 999px; background: var(--panel-solid); padding: .55rem .8rem; color: var(--ink); cursor: pointer; white-space: nowrap; font-size: .7rem; font-weight: 900; }
.reset-filters:disabled { opacity: .42; cursor: default; }

.lesson-shell { padding-top: 0; }
.lesson-stage { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 1.8rem; background: var(--panel-solid); box-shadow: var(--shadow); }
.lesson-accent { height: .45rem; background: var(--tool-accent); }
.lesson-header { display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: 1rem; align-items: center; padding: clamp(1.2rem,3vw,2rem); }
.lesson-title-wrap p { margin: .3rem 0 0; color: var(--muted); font-size: .82rem; }
.lesson-title { margin: 0; font-size: clamp(1.8rem,4vw,3rem); letter-spacing: -.055em; }
.close-lesson { width: 2.7rem; height: 2.7rem; border: 1px solid var(--line); border-radius: .8rem; background: var(--panel); cursor: pointer; }
.lesson-grid { display: grid; grid-template-columns: minmax(15rem,.34fr) minmax(0,1fr); border-top: 1px solid var(--line); }
.lesson-sidebar { border-right: 1px solid var(--line); background: color-mix(in srgb, var(--panel-solid) 88%, var(--blue)); padding: 1.4rem; }
.lesson-sidebar h3 { margin: 0 0 .5rem; font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; }
.lesson-sidebar p { margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.6; }
.best-for { display: grid; gap: .45rem; margin-top: 1.2rem; }
.best-for span { border-left: .2rem solid var(--blue); padding: .35rem .55rem; color: var(--muted); font-size: .72rem; line-height: 1.4; }
.lesson-body { display: grid; gap: .65rem; padding: 1.4rem; }
.lesson-body details { border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); }
.lesson-body summary { display: flex; min-height: 3.5rem; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; cursor: pointer; font-size: .82rem; font-weight: 900; list-style: none; }
.lesson-body summary::-webkit-details-marker { display: none; }
.lesson-body summary::after { content: "+"; color: var(--blue); font-size: 1.2rem; }
.lesson-body details[open] summary::after { content: "−"; }
.detail-content { border-top: 1px solid var(--line); padding: 1rem; }
.detail-content p { margin: 0; color: var(--muted); font-size: .8rem; line-height: 1.65; }
.feature-list, .workflow-steps, .boundary-list { display: grid; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.feature-item { display: grid; grid-template-columns: minmax(8rem,.3fr) minmax(0,1fr); gap: 1rem; padding-bottom: .65rem; border-bottom: 1px solid var(--line); }
.feature-item:last-child { border-bottom: 0; padding-bottom: 0; }
.feature-item strong { font-size: .75rem; }
.feature-item span { color: var(--muted); font-size: .76rem; line-height: 1.5; }
.workflow-step { display: grid; grid-template-columns: 2rem minmax(0,1fr); gap: .7rem; align-items: start; }
.workflow-step b { display: grid; width: 1.8rem; height: 1.8rem; place-items: center; border-radius: .55rem; background: var(--ink); color: var(--bg); font-size: .65rem; }
.workflow-step strong { display: block; font-size: .76rem; }
.workflow-step span { color: var(--muted); font-size: .72rem; line-height: 1.5; }
.boundary-list li { border-left: .2rem solid var(--amber); padding: .2rem .65rem; color: var(--muted); font-size: .75rem; line-height: 1.55; }
.source-list { display: flex; flex-wrap: wrap; gap: .5rem; }
.source-list a { border: 1px solid var(--line); border-radius: .7rem; padding: .55rem .7rem; color: var(--blue); font-size: .7rem; font-weight: 850; text-decoration: none; }
.source-list a:hover { border-color: var(--blue); }

.atlas-principle { width: min(900px,calc(100% - 2rem)); margin: 0 auto clamp(5rem,9vw,8rem); border: 1px solid var(--line); border-radius: 1.8rem; background: linear-gradient(135deg,color-mix(in srgb,var(--panel-solid) 84%,var(--blue)),color-mix(in srgb,var(--panel-solid) 88%,var(--violet))); padding: clamp(1.5rem,5vw,3.5rem); text-align: center; box-shadow: var(--shadow); }
.atlas-principle h2 { margin: 0; font-size: clamp(2rem,5vw,4rem); letter-spacing: -.06em; }
.atlas-principle > p:last-of-type { max-width: 65ch; margin: 1rem auto 0; color: var(--muted); line-height: 1.7; }
.principle-link { display: inline-flex; margin-top: 1.4rem; border-radius: .7rem; color: var(--blue); font-size: .8rem; font-weight: 900; text-decoration: none; }
.site-footer { display: flex; width: min(1180px,calc(100% - 2rem)); justify-content: space-between; gap: 2rem; align-items: end; margin: auto; border-top: 1px solid var(--line); padding: 2rem 0 3rem; }
.site-footer strong { font-size: .9rem; }
.site-footer p { margin: .35rem 0 0; color: var(--muted); font-size: .75rem; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .25rem; }

@media (max-width: 980px) {
  .atlas-hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-copy { max-width: 52rem; }
  .surface-map { width: min(38rem,100%); }
  .path-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .tool-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 800px) {
  html { scroll-padding-top: 7.5rem; }
  .header-inner { grid-template-columns: 1fr auto; }
  .header-nav-wrap { grid-column: 1 / -1; grid-row: 2; width: 100%; }
  .header-nav { justify-content: flex-start; overflow-x: auto; width: 100%; padding: 0 0 .55rem; scrollbar-width: thin; overscroll-behavior-inline: contain; }
  .path-section, .catalog-section, .lesson-shell { scroll-margin-top: 7.5rem; }
}

@media (max-width: 520px) {
  .header-nav { padding-right: 4.5rem; }
  .nav-scroll-cue { position: absolute; top: 0; right: 0; bottom: .55rem; display: inline-flex; align-items: center; background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--bg) 96%, transparent) 28%); padding-left: 2rem; color: var(--blue); font-size: .68rem; font-weight: 950; pointer-events: none; }
}

@media (max-width: 720px) {
  .brand-subtitle, .control-label { display: none; }
  .header-actions { gap: .35rem; }
  .icon-button, .language-button { width: 2.5rem; min-width: 2.5rem; padding: 0; }
  .atlas-hero { padding-top: 3.5rem; }
  .surface-map { overflow: hidden; }
  .surface-map::before { display: none; }
  .atlas-hero h1 { font-size: clamp(2.8rem,14vw,4.7rem); }
  .surface-lane .lane-copy { display: grid; }
  .section-heading { grid-template-columns: 1fr; gap: .8rem; }
  .path-grid { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; padding: .2rem .1rem .75rem; }
  .mobile-scroll-cue { display: block; margin: .65rem 0 0; color: var(--blue); font-size: .72rem; font-weight: 850; }
  .path-card { min-width: min(15rem,78vw); scroll-snap-align: start; }
  .catalog-tools { display: grid; }
  .room-filter-row { display: grid; }
  .search-box { width: 100%; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 18rem; }
  .lesson-header { grid-template-columns: auto minmax(0,1fr) auto; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-item { grid-template-columns: 1fr; gap: .3rem; }
  .site-footer { display: grid; }
  .site-footer nav { justify-content: flex-start; }
}

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

/* Goals wrap; a focused lesson replaces browsing rather than extending it. */
[hidden] { display: none !important; }
html { scroll-behavior: auto; }
.path-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); overflow: visible; }
.path-card { min-width: 0; min-height: 10rem; }
.family-filters, .room-filters { flex-wrap: wrap; overflow: visible; }
.atlas-filters { border: 1px solid var(--line); border-radius: 1rem; padding: .8rem; margin-bottom: 1rem; }
.atlas-filters > summary { cursor: pointer; font-weight: 800; font-size: .8rem; }
.atlas-filters[open] > summary { margin-bottom: .8rem; }
.atlas-filters .room-filter-row { margin: .6rem 0 0; }
#activeFilters { color: var(--muted); font-size: .8rem; min-height: 1.3em; }
.lesson-shell { padding-top: 2rem; min-height: 70vh; }
.lesson-shell > button { cursor: pointer; margin-bottom: 1rem; }
.lesson-facts { display: flex; flex-wrap: wrap; gap: .4rem; padding: 0 1.4rem 1rem; }
.lesson-facts span { border: 1px solid var(--line); border-radius: .5rem; padding: .45rem; font-size: .74rem; color: var(--muted); }
.lesson-sidebar .lesson-prerequisite { margin-top: 1rem; }
@media (max-width: 720px) {
 .path-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .6rem; }
 .path-card { min-width: 0; padding: .8rem; }
 .path-card strong { font-size: .9rem; }
}

.path-section, .catalog-section { scroll-margin-top: 0 !important; }

.lesson-title:focus { outline: none; }