/* PatternMastery .com — shared styles for index / curriculum / interview-intel (2026 transit-map relaunch)
   Rules: colors mean lines (lanes) and nothing else; languages are words; no accordions for content. */
:root{--g:#16a34a;--g2:#15803d;--ink:#1d1d1f;--mute:#6e6e73;--faint:#aeaeb2;--line:rgba(0,0,0,.08);--bg:#f5f5f7;--card:#fff;--dark:#0f172a;--dark2:#111827;--yellow:#ffd54a;--gold:#e0a400;--blue:#2563eb;--r:16px;--r-s:10px;--max:1140px}
html{scroll-behavior:smooth}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;line-height:1.5}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
code,pre,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.sr-only:focus{position:static;width:auto;height:auto;padding:12px 24px;background:var(--ink);color:#fff;font-weight:600}
html,body{overflow-x:hidden;max-width:100%}

/* offer bar + nav */
.offer-bar{background:var(--ink);color:#f5f5f7;font-size:13px;display:flex;justify-content:center;align-items:center;gap:14px;padding:9px 16px;flex-wrap:wrap}
.offer-bar strong{color:#30d158}
.offer-bar s{opacity:.55}
.offer-bar a{background:var(--g);color:#fff;padding:5px 14px;border-radius:980px;font-weight:600;font-size:12px}
.sticky{position:sticky;top:0;z-index:50}
nav.site{background:rgba(251,251,253,.82);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--max);margin:0 auto;padding:0 22px;height:52px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.logo{font-weight:800;font-size:19px;letter-spacing:-.04em}
.logo span{color:var(--g)}
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:8px;color:var(--ink)}
.hamburger svg{width:22px;height:22px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:6px 11px;font-size:12.5px;color:#424245;border-bottom:2px solid transparent;white-space:nowrap}
.nav-links a:hover{color:var(--ink)}
.nav-links a.here{color:var(--g);font-weight:600;border-bottom-color:var(--g)}
.nav-links a.new::after{content:"new";font-size:8px;font-weight:800;color:var(--g);text-transform:uppercase;margin-left:4px;vertical-align:super}
.nav-signin{border:1px solid #d2d2d7;border-radius:980px;padding:6px 12px!important;font-weight:600;color:var(--ink)!important;margin-left:6px}
.nav-cta{background:var(--g);color:#fff!important;font-weight:600;padding:7px 16px!important;border-radius:980px;margin-left:6px;border-bottom:none!important}
.nav-cta:hover{background:var(--g2)}
@media(max-width:860px){
  .hamburger{display:block}
  .nav-links{display:none;position:absolute;top:52px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:0 12px 30px rgba(0,0,0,.08)}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 6px;font-size:14px}
  .nav-inner{position:relative}
}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:980px;font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:transform .2s,background .2s,border-color .2s;letter-spacing:-.01em;font-family:inherit}
.btn-g{background:var(--g);color:#fff}
.btn-g:hover{background:var(--g2);transform:translateY(-1px)}
.btn-o{background:#fff;border-color:#d2d2d7;color:var(--ink)}
.btn-o:hover{border-color:#86868b}
.btn-d{background:var(--ink);color:#fff}
.btn-sm{padding:9px 16px;font-size:13px}
.fine{font-size:12.5px;color:var(--mute)}
.fine.ok{color:var(--g);font-weight:600}
.actions{display:flex;gap:12px;flex-wrap:wrap}

/* sections */
section.s{padding:72px 0}
section.s.tight{padding:48px 0}
section.s.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
section.s.dark{background:var(--dark);color:#e5e7eb}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--g);margin-bottom:10px}
.dark .eyebrow{color:var(--yellow)}
h2.t{font-size:clamp(28px,4vw,38px);font-weight:800;letter-spacing:-.035em;line-height:1.1}
p.lead{margin-top:12px;font-size:16px;color:var(--mute);max-width:680px;line-height:1.6}
.dark p.lead{color:#9ca3af}
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
@media(max-width:900px){.split{grid-template-columns:1fr}}
.split>*{min-width:0}
.card{background:var(--card);border-radius:var(--r);box-shadow:0 1px 3px rgba(0,0,0,.04),0 6px 20px rgba(0,0,0,.05)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.g2>*,.g3>*,.g4>*{min-width:0}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:12px;font-weight:600;border:1px solid var(--line);background:#fff;border-radius:980px;padding:5px 11px;color:var(--ink)}
.chip.soon{color:var(--mute);border-style:dashed}
.line-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--c,#888);margin-right:7px;vertical-align:-1px}
.tag{display:inline-block;white-space:nowrap;font-size:9.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;border-radius:980px;padding:2px 7px;background:var(--gold);color:#111;vertical-align:1px}
.tag.free{background:var(--g);color:#fff}

/* language control: words only */
.langctl{display:inline-flex;gap:3px;background:#f0f0f3;border:1px solid var(--line);border-radius:980px;padding:3px}
.langctl button{border:none;background:transparent;color:var(--mute);font:inherit;font-size:12px;font-weight:600;padding:5px 11px;border-radius:980px;cursor:pointer}
.langctl button.on{background:var(--ink);color:#fff}
.langctl.dark{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.langctl.dark button{color:#9ca3af}
.langctl.dark button.on{background:var(--yellow);color:#111}

/* ── 1 · hero map ───────────────────────────────────────── */
.hero{padding:56px 0 40px}
.hero-top{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:end;margin-bottom:22px}
@media(max-width:900px){.hero-top{grid-template-columns:1fr;gap:20px}}
.hero h1{font-size:clamp(36px,5.2vw,58px);font-weight:900;line-height:1.02;letter-spacing:-.045em}
.hero h1 em{font-style:normal;color:var(--g)}
.hero p.sub{margin-top:18px;font-size:17px;line-height:1.6;color:var(--mute);max-width:560px}
.hero .actions{margin-top:24px}
.facts{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.facts li{background:#fff;border:1px solid var(--line);border-radius:var(--r-s);padding:12px 14px;position:relative}
.facts .fact-ic{position:absolute;right:12px;top:12px;width:34px;height:34px;display:grid;place-items:center;--tm-fill:#fff;--tm-stroke:#111318;--tm-gold:#e0a400;--tm-bg:#fff}
.facts .fact-ic svg{width:34px;height:34px;overflow:visible;display:block}
.facts .fact-ic .sym-rail{fill:none;stroke:var(--c);stroke-width:4px;stroke-linecap:round}
.facts b{display:block;font-size:26px;font-weight:900;letter-spacing:-.04em;line-height:1}
.facts span{font-size:12.5px;color:var(--mute);display:block;margin-top:4px;line-height:1.35}
.hero-mapwrap{display:flex;flex-direction:column;gap:14px}
.hero-canvas{height:clamp(440px,64vh,640px);border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 24px 60px rgba(15,23,42,.10);transition:height .5s cubic-bezier(.4,0,.2,1)}
.hero-canvas[data-level="2"]{height:clamp(380px,50vh,520px)}
@media(max-width:760px){.hero-canvas{height:clamp(420px,62vh,620px)}.hero-canvas[data-level="2"]{height:clamp(440px,66vh,720px)}}
.map-hint{margin-top:14px;font-size:13px;color:var(--mute);text-align:center}
.map-hint b{color:var(--ink)}

/* drawer (station / line) */
.drawer{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px 24px;box-shadow:0 20px 50px rgba(15,23,42,.08);animation:drIn .4s cubic-bezier(.2,.8,.2,1)}
@keyframes drIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.drawer{animation:none}}
.dr-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.dr-head .lbl{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mute)}
.dr-head h3{font-size:clamp(22px,3vw,30px);font-weight:800;letter-spacing:-.03em;margin-top:4px}
.dr-head .one{font-size:15px;color:var(--mute);margin-top:6px;max-width:720px;line-height:1.55}
.dr-close{flex:none;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:20px;line-height:1;cursor:pointer;color:var(--mute)}
.dr-close:hover{color:var(--ink);border-color:#86868b}
.cap{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mute);margin-bottom:8px}
.dr-stop{margin-top:16px;background:#fafafa;border:1px solid var(--line);border-radius:14px;padding:14px 16px;display:grid;gap:6px}
.dr-stop .lbl{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--g)}
.dr-stop b{font-size:16px}
.dr-stop>span{font-size:13px;color:var(--mute)}
.dr-stop .twistrow{font-size:13px;color:var(--ink)}
.dr-stop .twistrow code{background:#fff;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:12px}
.dr-stop .btn{justify-self:start;margin-top:4px}
.dr-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;margin-top:18px}
@media(max-width:900px){.dr-grid{grid-template-columns:1fr}}
.dr-grid>*{min-width:0}
.dr-rec ul{list-style:none;display:grid;gap:6px;margin-bottom:16px}
.dr-rec li{font-size:13.5px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:#fafafa}
.dr-rec li::before{content:"\25B8";color:var(--g);margin-right:8px}
.dr-rec code,.dr-stops code{font-size:12px;background:#f0f0f3;border-radius:4px;padding:0 4px}
.dr-stops ol{list-style:none;display:grid;gap:6px}
.dr-stops li{display:grid;grid-template-columns:auto 1fr;gap:4px 10px;align-items:center;font-size:13.5px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;transition:border-color .15s,transform .15s}
.dr-stops li:hover{border-color:#86868b;transform:translateX(2px)}
.dr-stops li.cur{border-color:var(--gold);box-shadow:0 0 0 3px rgba(224,164,0,.18)}
.dr-stops li .role{font-size:9.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;border-radius:980px;padding:2px 7px;border:1px solid var(--line);color:var(--mute);grid-row:span 2}
.dr-stops li .role.anchor{background:var(--ink);border-color:var(--ink);color:#fff}
.dr-stops li b{font-weight:600}
.dr-stops li .meta{font-size:11.5px;color:var(--mute)}
.dr-demo.blockdemo{margin-top:4px}
.dr-foot{margin-top:18px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--mute);border-top:1px solid var(--line);padding-top:16px}
.dr-locked pre.pmad-code{background:#0b1220;color:#e5e7eb;border-radius:12px;padding:14px 16px;font-size:12.5px;line-height:1.6;overflow:auto;border:1px solid rgba(255,255,255,.08)}
.dr-locked .pmad-ln.frost{color:#334155;filter:blur(2px);user-select:none}
.dr-locked .unlock{margin-top:12px;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;background:rgba(22,163,74,.06);border:1px solid rgba(22,163,74,.25);border-radius:12px;padding:12px 14px}
.dr-lane-stations{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
@media(max-width:900px){.dr-lane-stations{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.dr-lane-stations{grid-template-columns:1fr}}
.dr-lane-stations button{text-align:left;background:#fafafa;border:1px solid var(--line);border-left:4px solid var(--c,#888);border-radius:12px;padding:12px 14px;font:inherit;cursor:pointer;display:grid;gap:4px;color:inherit;transition:transform .15s,border-color .15s}
.dr-lane-stations button:hover{transform:translateY(-2px);border-color:#86868b}
.dr-lane-stations b{font-size:14px}
.dr-lane-stations span{font-size:12.5px;color:var(--mute);line-height:1.45}
.dr-lane-stations small{font-size:11px;color:var(--faint)}

/* ── 2 · reasons ────────────────────────────────────────── */
.reasons{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:28px}
@media(max-width:760px){.reasons{grid-template-columns:1fr}}
.reason{display:grid;grid-template-columns:150px 1fr;gap:16px;align-items:start;background:#fafafa;border:1px solid var(--line);border-radius:var(--r);padding:16px;min-width:0}
@media(max-width:520px){.reason{grid-template-columns:1fr}}
.reason-media{border-radius:10px;overflow:hidden;background:#fff;border:1px solid var(--line);aspect-ratio:2/1;display:flex;align-items:center;justify-content:center}
.reason-media img{width:100%;height:100%;object-fit:cover;object-position:top left}
.reason-media svg{width:100%;height:100%;padding:6px}
.reason-body .n{display:inline-block;font-size:11px;font-weight:800;color:var(--g);letter-spacing:.06em;margin-bottom:4px}
.reason-body h3{font-size:16px;font-weight:800;letter-spacing:-.02em;line-height:1.25}
.reason-body p{font-size:13.5px;color:var(--mute);margin-top:6px;line-height:1.55}

/* ── 3 · the shape deck ─────────────────────────────────── */
.deck-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;margin-top:28px;align-items:start}
@media(max-width:960px){.deck-wrap{grid-template-columns:1fr}.deck-side{order:-1;position:static}}
.deck-wrap>*{min-width:0}
.deck{display:grid;gap:10px}
.deck-row{display:grid;grid-template-columns:150px 1fr;gap:10px;align-items:start}
@media(max-width:600px){.deck-row{grid-template-columns:1fr;gap:6px}}
.deck-lane{font-size:12.5px;font-weight:700;color:#e5e7eb;padding-top:8px;border-left:3px solid var(--c);padding-left:10px;line-height:1.3}
.deck-lane .num{display:block;font-size:10px;letter-spacing:.08em;color:var(--c);font-weight:800}
.deck-cards{display:flex;flex-wrap:wrap;gap:6px}
.deck-cards button{text-align:left;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-left:3px solid var(--c);border-radius:10px;padding:7px 10px;font:inherit;cursor:pointer;color:#e5e7eb;display:grid;gap:1px;transition:background .15s,transform .15s,border-color .15s;position:relative}
.deck-cards button:hover{background:rgba(255,255,255,.09);transform:translateY(-1px)}
.deck-cards button.on{background:rgba(255,213,74,.14);border-color:var(--yellow)}
.deck-cards button b{font-size:12.5px;font-weight:600}
.deck-cards button span{font-size:10.5px;color:#9ca3af}
.deck-cards button.seen::after{content:"\2713";position:absolute;right:8px;top:6px;font-size:11px;font-weight:900;color:#5fcf83}
.deck-cards button.core b::before{content:"\25CF";color:var(--yellow);font-size:9px;margin-right:5px;vertical-align:2px}
.deck-side{position:sticky;top:70px;display:grid;gap:14px}
.deck-counter{font-size:13px;color:#9ca3af}
.deck-counter b{color:#fff;font-size:18px;margin-right:2px}
.shape-viewer{background:#0b1220;border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:14px 16px 12px}
.sv-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.sv-head .lbl{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:#9ca3af;font-weight:700}
.sv-head b{font-size:16px;color:#fff;display:block;margin-top:2px}
.shape-viewer pre.pmad-code{background:#0f172a;border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:12px 0;font-size:12.5px;line-height:1.6;overflow:auto;max-height:360px;color:#e5e7eb}
.shape-viewer pre.pmad-code .pmad-ln,.dr-locked pre.pmad-code .pmad-ln{white-space:pre;overflow-wrap:normal}
.sv-foot{margin-top:10px;font-size:12px;color:#9ca3af}
.sv-foot a{color:var(--yellow);font-weight:600}
.twist{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:14px 16px}
.twist .cap{color:#9ca3af}
.twist table{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:10px}
.twist th{text-align:left;color:var(--yellow);font-family:ui-monospace,Menlo,monospace;font-size:12px;font-weight:700;padding:6px 10px 6px 0;vertical-align:top;white-space:nowrap;width:1%}
.twist td{padding:6px 0;color:#cbd5e1;border-bottom:1px solid rgba(255,255,255,.06)}
.twist table.stop td{color:#fff;font-weight:600}
.twist code{background:rgba(255,255,255,.08);border-radius:4px;padding:0 4px;font-size:12px}
.s.dark .twist-host:empty{display:none}

/* live block demo (dark card) */
.blockdemo{background:var(--dark);color:#e5e7eb;border-radius:20px;padding:18px 18px 14px;box-shadow:0 24px 60px rgba(15,23,42,.25);min-width:0;max-width:100%}
.blockdemo .bd-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.blockdemo .bd-head .lbl{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--yellow);font-weight:700}
.blockdemo .bd-head .name{font-weight:800;font-size:15px;color:#fff}
.blockdemo .bd-grid{display:grid;grid-template-columns:1fr;gap:12px}
.blockdemo.wide .bd-grid{grid-template-columns:1fr 1fr}
@media(max-width:760px){.blockdemo.wide .bd-grid{grid-template-columns:1fr}}
.blockdemo .bd-grid>*{min-width:0}
.blockdemo .pmad{margin:0}
.blockdemo .bd-scene{min-width:0;overflow-x:auto}
.blockdemo .bd-scene .pmad{background:transparent}
.blockdemo pre.pmad-code{background:#0b1220;border-color:rgba(255,255,255,.08);font-size:11.5px;max-height:300px;max-width:100%}
.blockdemo .bd-inv{margin-top:10px;font-size:12.5px;color:#cbd5e1;border-left:3px solid var(--yellow);padding:6px 10px;background:rgba(255,213,74,.06);border-radius:0 8px 8px 0}
.blockdemo .bd-inv b{color:var(--yellow);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;display:block}
.blockdemo .bd-foot{margin-top:10px;font-size:12px;color:#9ca3af;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.blockdemo .bd-foot a{color:var(--yellow);font-weight:600}
.drawer .blockdemo{box-shadow:none;background:#0b1220}

/* ── 4 · one stop end to end ────────────────────────────── */
.e2e{margin-top:28px;align-items:start}
.player{background:#000;border-radius:var(--r);overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.18);position:relative}
.player video{width:100%;display:block;aspect-ratio:16/9;background:#000}
.player .vcap{position:absolute;left:14px;bottom:12px;background:rgba(0,0,0,.6);color:#fff;font-size:12px;padding:5px 10px;border-radius:8px;backdrop-filter:blur(6px)}
.langctl.light{background:#fff}
.e2e-steps{list-style:none;display:grid;gap:8px;counter-reset:st;margin-bottom:14px}
.e2e-steps li{display:grid;grid-template-columns:28px 1fr;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;counter-increment:st}
.e2e-steps li::before{content:counter(st);width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;font-size:12px;font-weight:800;display:grid;place-items:center}
.e2e-steps b{display:block;font-size:14px}
.e2e-steps span{grid-column:2;font-size:13px;color:var(--mute);line-height:1.5}
.e2e-steps code{font-size:12px;background:#f0f0f3;border-radius:4px;padding:0 4px}

/* ── 5 · routes ─────────────────────────────────────────── */
.routes-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;margin-top:28px;align-items:start}
@media(max-width:960px){.routes-grid{grid-template-columns:1fr}}
.routes-grid>*{min-width:0}
.route-canvas{height:clamp(400px,56vh,560px);border:1px solid var(--line);border-radius:20px;background:#f5f5f7}
.packs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.packs.small{grid-template-columns:1fr;margin-top:0;gap:10px}
@media(max-width:800px){.packs{grid-template-columns:1fr}}
.pack{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px}
.packs.small .pack{padding:14px 16px;background:#fafafa}
.pack h3{font-size:17px;font-weight:800;letter-spacing:-.02em}
.pack .role{font-size:12.5px;color:var(--mute);margin:2px 0 10px}
.pack .stats{display:flex;flex-wrap:wrap;gap:6px}
.pack .stats span{font-size:11px;border:1px solid var(--line);border-radius:980px;padding:2px 8px;color:var(--mute);background:#fff}
.sample{margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px}
.sample h4{font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--mute);margin-bottom:10px}
.sample ol{list-style:none;display:grid;gap:8px}
.sample li{font-size:14px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fafafa}
.sample li .k{font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--blue);margin-right:8px}
.sample li .b{font-size:11px;color:var(--g);font-weight:700;margin-left:8px}
.sample li.blur{filter:blur(4px);user-select:none;pointer-events:none}
.sample .unlock{margin-top:10px;font-size:13px;color:var(--mute)}
.sample .unlock a{color:var(--g);font-weight:600}
.cos{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:24px}
@media(max-width:900px){.cos{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.cos{grid-template-columns:repeat(2,1fr)}}
.co{background:#fff;border:1px solid var(--line);border-radius:var(--r-s);padding:12px 14px;display:flex;align-items:center;gap:10px}
.co i{width:30px;height:30px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:13px;font-style:normal}
.co b{font-size:13.5px;display:block}
.co small{font-size:11px;color:var(--mute)}

/* ── 6 · pricing ────────────────────────────────────────── */
.price{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:24px;padding:36px;margin-top:28px}
@media(max-width:820px){.price{grid-template-columns:1fr;padding:26px}}
.price>*{min-width:0}
.price .big{font-size:56px;font-weight:900;letter-spacing:-.05em;line-height:1}
.price .big small{font-size:16px;font-weight:600;color:var(--mute);letter-spacing:0}
.price .was{color:var(--mute);font-size:14px;margin-top:4px}
.price ul{list-style:none;display:grid;gap:8px;margin-top:14px}
.price li{font-size:14px;padding-left:22px;position:relative}
.price li::before{content:"\2713";position:absolute;left:0;color:var(--g);font-weight:800}
.price .actions{margin-top:18px}

/* ── 7 · faq ────────────────────────────────────────────── */
.faq{margin-top:24px;display:grid;gap:10px;max-width:820px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.faq summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"+";color:var(--g);font-weight:800}
.faq details[open] summary::after{content:"\2212"}
.faq p{margin-top:8px;font-size:14px;color:var(--mute);line-height:1.6}

/* footer */
footer.site{background:#fff;border-top:1px solid var(--line);padding:36px 0 28px;font-size:13px;color:var(--mute)}
footer.site .links{display:flex;flex-wrap:wrap;gap:6px 18px;margin-bottom:12px}
footer.site .links a:hover{color:var(--ink)}
footer.site .legal{margin-top:10px;font-size:12px}

/* ── curriculum (the map explorer page) ─────────────────── */
.explorer{padding:28px 0 56px}
.explorer-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap;margin-bottom:16px}
.explorer-head h1{font-size:clamp(28px,4vw,40px);font-weight:900;letter-spacing:-.04em;line-height:1.05}
.explorer-head p{color:var(--mute);margin-top:8px;max-width:640px;font-size:15px}
.explorer-canvas{height:clamp(480px,70vh,760px);border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 24px 60px rgba(15,23,42,.08);transition:height .5s cubic-bezier(.4,0,.2,1)}
.explorer-canvas[data-level="2"]{height:clamp(380px,52vh,540px)}
@media(max-width:760px){.explorer-canvas{height:clamp(440px,66vh,680px)}.explorer-canvas[data-level="2"]{height:clamp(440px,66vh,720px)}}
.explorer .drawer{margin-top:14px}
.explorer-foot{margin-top:18px;display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between;font-size:13px;color:var(--mute)}

@media(max-width:600px){.hero h1{font-size:34px}.hero .sub{font-size:16px}.blockdemo{padding:14px 12px 12px}.chip{font-size:11px;padding:4px 9px}.drawer{padding:16px}}