@font-face{font-family:Sora;font-weight:400;font-display:swap;src:url(../fonts/sora-400.ttf) format('truetype')}
@font-face{font-family:Sora;font-weight:600;font-display:swap;src:url(../fonts/sora-600.ttf) format('truetype')}
@font-face{font-family:Sora;font-weight:700;font-display:swap;src:url(../fonts/sora-700.ttf) format('truetype')}
:root{color-scheme:dark;--bg:#060a15;--bg2:#0a1022;--card:#0e1630;--card2:#121c3b;--line:#1e2a4d;--text:#e9eeff;--muted:#9aa8cc;--cyan:#48cdde;--purple:#7c53cb;--lilac:#8f7cf5;--green:#5fe0a8;--amber:#f0c36a;--red:#ff7a8a;--on:#04101c;--grad:linear-gradient(135deg,#48cdde,#7c53cb);--r:16px;--sh:0 10px 30px rgba(0,0,0,.35);--font:Sora,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif}
@media(prefers-color-scheme:light){:root{color-scheme:light;--bg:#f5f7fd;--bg2:#eaeffb;--card:#fff;--card2:#fff;--line:#d9e0f2;--text:#121a33;--muted:#55628a;--cyan:#0a7f93;--purple:#5b34b0;--lilac:#5b34b0;--green:#0c7a50;--amber:#8a6200;--red:#b3263a;--on:#fff;--grad:linear-gradient(135deg,#0a8fa5,#5b34b0);--sh:0 10px 30px rgba(40,60,120,.12)}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--font);min-height:100vh;display:flex;flex-direction:column}
body:before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(900px 520px at 85% -10%,rgba(124,83,203,.22),transparent),radial-gradient(700px 420px at 0% 8%,rgba(72,205,222,.14),transparent)}
main{flex:1;padding-top:28px;padding-bottom:56px}
.wrap{width:100%;max-width:1100px;margin:0 auto;padding:0 18px}
a{color:var(--cyan)}a:hover{filter:brightness(1.15)}
h1{font-size:clamp(1.7rem,5vw,2.5rem);line-height:1.15;margin:.3em 0 .5em;letter-spacing:-.01em}
h2{font-size:1.3rem;margin:2em 0 .6em}
.muted{color:var(--muted)}.small{font-size:.85rem}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px;top:8px;background:var(--cyan);color:var(--on);padding:8px 12px;border-radius:8px;z-index:99}.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
svg.i{width:1.2em;height:1.2em;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
/* header */
.top{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:14px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700;white-space:nowrap}
.hsearch{position:relative;flex:1;max-width:420px;margin-left:auto}
.hsearch input{width:100%;background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:9px 12px 9px 36px;font:400 .92rem var(--font);min-height:42px}
.hsearch>svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
nav.main{display:flex;gap:2px}
nav.main a{color:var(--muted);text-decoration:none;padding:7px 11px;border-radius:10px;font-size:.9rem;white-space:nowrap}
nav.main a:hover{color:var(--text)}nav.main a.on{color:var(--text);background:rgba(72,205,222,.14)}
.drop{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh);max-height:70vh;overflow:auto;z-index:60}
.drop[hidden]{display:none}
.drop a{display:block;padding:10px 14px;color:var(--text);text-decoration:none;border-bottom:1px solid var(--line)}
.drop a:last-child{border-bottom:0}.drop a:hover,.drop a.sel{background:rgba(72,205,222,.1)}
.drop a b{display:block;font-weight:600;font-size:.92rem}.drop a span{font-size:.78rem;color:var(--muted)}
.drop .none{padding:14px;color:var(--muted);font-size:.9rem}
@media(max-width:820px){.bar{flex-wrap:wrap}nav.main{order:3;width:100%;overflow-x:auto;padding-bottom:2px}.hsearch{max-width:none;flex-basis:100%;order:2;margin-left:0}}
/* hero */
.hero{padding:34px 0 8px;text-align:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--cyan);font-weight:600;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--line);background:var(--card);padding:5px 12px;border-radius:99px;margin:0}
.hero h1{font-size:clamp(2rem,6.5vw,3.5rem);margin:.45em auto .3em;max-width:18ch}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:1.1rem;color:var(--muted);max-width:58ch;margin:0 auto}
.bigsearch{position:relative;max-width:640px;margin:26px auto 12px;text-align:left}
.bigsearch input{width:100%;background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:16px;padding:17px 18px 17px 50px;font:400 1.05rem var(--font);box-shadow:var(--sh);min-height:58px}
.bigsearch>svg{position:absolute;left:18px;top:19px;color:var(--cyan);width:1.4em;height:1.4em}
input:focus{border-color:var(--cyan)!important;outline:none;box-shadow:0 0 0 3px rgba(72,205,222,.22)}
.try{color:var(--muted);font-size:.88rem}.try a{margin:0 4px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:34px 0 6px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;text-align:center}
.stat b{display:block;font-size:1.8rem;line-height:1.1}.stat span{color:var(--muted);font-size:.85rem}
/* grids/cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.cat{display:flex;flex-direction:column;gap:6px;background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:var(--r);padding:18px;color:var(--text);text-decoration:none;min-width:0;transition:transform .15s,border-color .15s,box-shadow .15s}
.cat:hover{transform:translateY(-3px);border-color:var(--cyan);box-shadow:var(--sh);filter:none}
.cat .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--grad);color:var(--on);margin-bottom:6px}
.cat .ic svg{width:24px;height:24px}
.cat b{font-size:1.02rem}.cat p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.5}.cat .n{margin-top:auto;padding-top:8px;color:var(--cyan);font-size:.82rem;font-weight:600}
.gl{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.gcard{display:flex;flex-direction:column;gap:6px;background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:var(--r);padding:16px;color:var(--text);text-decoration:none;min-width:0;transition:border-color .15s,transform .15s}
.gcard:hover{border-color:var(--cyan);transform:translateY(-2px);filter:none}
.gcard[hidden]{display:none}
.gcard b{overflow-wrap:anywhere;line-height:1.35}.gcard .muted{font-size:.86rem;line-height:1.45;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.pill{font-size:.7rem;font-weight:600;border-radius:99px;padding:2px 10px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.pill.cat-p{color:var(--cyan);border-color:rgba(72,205,222,.35);background:rgba(72,205,222,.08)}
.pill.easy{color:var(--green);border-color:rgba(95,224,168,.4);background:rgba(95,224,168,.08)}
.pill.medium{color:var(--amber);border-color:rgba(240,195,106,.4);background:rgba(240,195,106,.08)}
.pill.advanced{color:var(--lilac);border-color:rgba(143,124,245,.45);background:rgba(143,124,245,.1)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--grad);color:var(--on);font:600 .95rem var(--font);border:0;border-radius:12px;padding:12px 18px;min-height:46px;cursor:pointer;text-decoration:none;text-align:center}
.btn:hover{filter:brightness(1.1);color:var(--on)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.btn-ghost:hover{color:var(--text);border-color:var(--cyan);filter:none}
.btn-sm{min-height:38px;padding:7px 14px;font-size:.88rem}.btn-block{display:flex;width:100%}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
/* bands */
.band{background:linear-gradient(135deg,rgba(72,205,222,.12),rgba(124,83,203,.18));border:1px solid var(--line);border-radius:22px;padding:28px;margin:34px 0;display:grid;gap:18px}
.band h2{margin:0 0 6px}.band p{margin:0;color:var(--muted)}
@media(min-width:760px){.band{grid-template-columns:1.4fr 1fr;align-items:center}}
.steps3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;counter-reset:s}
.steps3 div{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 16px 58px;position:relative}
.steps3 div:before{counter-increment:s;content:counter(s);position:absolute;left:14px;top:14px;width:32px;height:32px;border-radius:50%;background:var(--grad);color:var(--on);display:grid;place-items:center;font-weight:700}
.steps3 b{display:block}.steps3 span{color:var(--muted);font-size:.9rem}
.note{background:rgba(124,83,203,.12);border:1px solid rgba(124,83,203,.35);border-radius:var(--r);padding:14px 16px;margin:26px 0}
.warn{background:rgba(240,195,106,.1);border-color:rgba(240,195,106,.4)}
.card{background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:var(--r);padding:20px;margin:0 0 16px}
/* listing */
.tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:14px 0}
.tools input[type=search]{flex:1;min-width:200px;background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:11px 14px;font:400 1rem var(--font);min-height:46px}
select{background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:10px 12px;font:inherit;min-height:46px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 12px}
.chip{background:var(--card);color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:7px 14px;font:inherit;font-size:.86rem;cursor:pointer}
.chip.on{color:var(--on);background:var(--cyan);border-color:var(--cyan)}
.page-head{display:flex;gap:16px;align-items:center;margin-bottom:6px}
.page-head .ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;background:var(--grad);color:var(--on);flex:none}.page-head .ic svg{width:30px;height:30px}
.page-head h1{margin:0}
/* article */
.layout{display:grid;gap:32px}
@media(min-width:960px){.layout{grid-template-columns:minmax(0,1fr) 260px;align-items:start}.aside{position:sticky;top:90px}}
.article{max-width:70ch}.article h1{margin-top:.4em}.article h2{margin-top:1.6em;scroll-margin-top:90px}.article li{margin:.4em 0}.article ol,.article ul{padding-left:1.35em}
.article p{margin:.8em 0}.article strong{color:var(--text)}
.aside .card{padding:16px}.aside h3{margin:0 0 8px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.toc{list-style:none;padding:0;margin:0}.toc li{margin:0}.toc a{display:block;padding:6px 0;color:var(--text);text-decoration:none;font-size:.9rem;border-left:2px solid var(--line);padding-left:12px}.toc a:hover{border-color:var(--cyan);color:var(--cyan)}
.crumbs{font-size:.88rem;color:var(--muted);margin:0 0 6px}.crumbs a{color:var(--muted)}
.check h2{margin:8px 0 14px;font-size:1.25rem}.check-opts{display:grid;gap:10px}.check-steps{padding-left:20px;line-height:1.7;margin:6px 0 18px}.check .btn-row{display:flex;flex-wrap:wrap;gap:10px}
footer{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:.86rem;background:var(--bg2)}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}footer b{color:var(--text);display:block;margin-bottom:6px}footer a{color:var(--muted);display:block;margin:3px 0}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.top,footer,.aside,.tools,.noprint{display:none!important}body:before{display:none}body{background:#fff;color:#000}.layout{display:block}}
.tblocks{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.tblock{background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:var(--r);padding:16px;display:flex;flex-direction:column;min-width:0}
.tblock .th{display:flex;gap:12px;align-items:center;margin-bottom:8px}.tblock .th b{display:block;line-height:1.25}.tblock .th span:not(.ic){color:var(--muted);font-size:.8rem}
.tblock .ic{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--grad);color:var(--on);flex:none}.tblock .ic svg{width:20px;height:20px}
.tblock ul{list-style:none;margin:0;padding:0;flex:1}.tblock li{border-top:1px solid var(--line)}.tblock li a{display:block;padding:8px 0;color:var(--text);text-decoration:none;font-size:.9rem;line-height:1.35}.tblock li a:hover{color:var(--cyan)}
.tblock .more{margin-top:8px;font-size:.85rem;font-weight:600}
.grp{margin:8px 0 6px}.grp[hidden]{display:none}.grp h2{font-size:1.15rem;margin:1.6em 0 .6em;padding-left:12px;border-left:3px solid var(--cyan);scroll-margin-top:90px}
.jump .chip{text-decoration:none;display:inline-block}