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li:before{background:var(--mint);border-radius:50%;color:var(--mint-ink);content:counter(s);display:grid;flex:none;font-size:.9rem;font-weight:700;height:28px;place-items:center;width:28px}.npb-site .cat-layout{align-items:start;display:grid;gap:56px;grid-template-columns:250px minmax(0,1fr);padding-block:40px 96px}.npb-site .cat-nav{position:sticky;top:calc(env(safe-area-inset-top,0px) + var(--npb-header-offset, 68px) + 24px)}.npb-site .cat-nav h2{color:var(--muted);font-size:.78rem;letter-spacing:.1em;margin-bottom:10px;text-transform:uppercase}.npb-site .cat-nav ul{border-left:2px solid var(--line);list-style:none;margin:0;padding:0}.npb-site .cat-nav a{color:var(--muted);display:flex;font-size:.93rem;gap:10px;justify-content:space-between;padding:7px 12px;text-decoration:none}.npb-site .cat-nav a:hover,.npb-site .cat-nav a[aria-current]{background:#f4f3fa;color:var(--ink)}.npb-site .cat-nav a[aria-current]{border-left:2px solid var(--brand);font-weight:700;margin-left:-2px}.npb-site .cat-nav small{font-variant-numeric:tabular-nums}.npb-site .cat-sec{scroll-margin-top:calc(var(--npb-header-offset, 68px) + 32px)}.npb-site .cat-sec+.cat-sec{border-top:1px solid var(--line);margin-top:44px;padding-top:36px}.npb-site .cat-sec h2{align-items:baseline;display:flex;font-size:var(--step-2);gap:10px}.npb-site .cat-sec h2 small{color:var(--muted);font-size:.9rem;font-weight:500}.npb-site .cat-sec>p{color:var(--muted);margin-top:6px}.npb-site .plist{display:grid;gap:0 32px;grid-template-columns:repeat(2,minmax(0,1fr));list-style:none;margin:16px 0 0;padding:0}.npb-site .plist a{border-bottom:1px solid var(--line);color:var(--ink);display:flex;gap:12px;justify-content:space-between;padding:11px 0;text-decoration:none}.npb-site .plist a:after{color:var(--brand);content:"→";opacity:0;transition:opacity .15s ease}.npb-site .plist a:hover{color:var(--brand)}.npb-site .plist a:hover:after{opacity:1}.npb-site .cat-more{display:inline-block;font-weight:700;margin-top:14px;text-decoration:none}@media(max-width:900px){.npb-site .cat-layout{gap:24px;grid-template-columns:minmax(0,1fr)}.npb-site .cat-nav{position:static}.npb-site .cat-nav ul{border:0;display:flex;flex-wrap:wrap;gap:6px}.npb-site .cat-nav a{border:1px solid var(--line);border-radius:999px;padding:5px 12px}.npb-site .cat-nav a[aria-current]{border:1px solid var(--brand);margin:0}}@media(max-width:600px){.npb-site .plist{grid-template-columns:minmax(0,1fr)}}.npb-site .ihero{padding-block:36px 48px}.npb-site .back{align-items:center;color:var(--on-band-muted);display:inline-flex;font-size:.9rem;gap:8px;margin-bottom:18px;text-decoration:none}.npb-site .back:hover{color:var(--on-band)}.npb-site .cat-tag{color:var(--mint);display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.08em;margin-bottom:10px;text-transform:uppercase}.npb-site .ihero h1{font-size:clamp(2rem,4.4vw,3rem);max-width:24ch}.npb-site .challenge{border-left:3px solid var(--mint);color:var(--on-band);font-size:var(--step-1);margin:22px 0 0;max-width:62ch;padding-left:18px}.npb-site .challenge b{color:var(--mint);display:block;font-size:.75rem;letter-spacing:.1em;margin-bottom:4px;text-transform:uppercase}.npb-site .item-layout{align-items:start;display:grid;gap:56px;grid-template-columns:minmax(0,1fr) 340px;padding-block:48px 72px}.npb-site .item-main{display:grid;gap:36px;max-width:68ch}.npb-site .item-main h2{font-size:var(--step-2);margin-bottom:10px}.npb-site .item-main p{color:#2e2a52}.npb-site .checks{display:grid;gap:10px;list-style:none;margin:0;padding:0}.npb-site .checks li{align-items:start;display:grid;gap:10px;grid-template-columns:24px minmax(0,1fr)}.npb-site .checks li:before{background:var(--mint) url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='none' stroke='%230e3b3d' stroke-linecap='round' stroke-linejoin='round' stroke-width='2.2' d='m5.5 10.5 3 3 6-7'/%3E%3C/svg%3E") center/20px no-repeat;border-radius:50%;content:"";height:20px;margin-top:3px;width:20px}.npb-site .facts{background:#fff;border:1px solid var(--line);border-radius:12px;display:grid;gap:0;grid-template-columns:repeat(3,minmax(0,1fr))}.npb-site .facts div{border-left:1px solid var(--line);padding:16px 18px}.npb-site .facts div:first-child{border-left:0}.npb-site .facts b{color:var(--band);display:block;font-size:1.05rem}.npb-site .facts span{color:var(--muted);font-size:.86rem}.npb-site .aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 34px #1d145814;display:grid;gap:16px;padding:24px;position:sticky;top:calc(env(safe-area-inset-top,0px) + var(--npb-header-offset, 68px) + 24px)}.npb-site .aside-card h2{font-size:var(--step-1)}.npb-site .aside-card .btn{justify-content:center}.npb-site .aside-card ol{color:var(--muted);display:grid;font-size:.93rem;gap:6px;margin:0;padding-left:1.2em}.npb-site .aside-card .small{border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;padding-top:14px}.npb-site .relcard{color:inherit;display:grid;gap:8px;text-decoration:none}.npb-site .relcard blockquote{color:var(--muted);font-size:.95rem;margin:0}@media(max-width:960px){.npb-site .item-layout{gap:32px;grid-template-columns:minmax(0,1fr)}.npb-site .aside-card{position:static}}@media(max-width:600px){.npb-site .facts{grid-template-columns:minmax(0,1fr)}.npb-site .facts div{border-left:0;border-top:1px solid var(--line)}.npb-site .facts div:first-child{border-top:0}}@media(max-width:900px){.npb-site .cat-nav{margin-inline:-16px}.npb-site .cat-nav h2{padding-inline:16px}.npb-site .cat-nav ul{flex-wrap:nowrap;overflow-x:auto;padding:0 16px 6px;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;scrollbar-width:none}.npb-site .cat-nav ul::-webkit-scrollbar{display:none}.npb-site .cat-nav li{flex:0 0 auto;scroll-snap-align:start}.npb-site .cat-nav a{white-space:nowrap}}