:root{--bg:#ffffff;--bg2:#f6f7fb;--card:#ffffff;--text:#0f172a;--muted:#5b6478;--line:#e5e8f0;
--a1:#4f46e5;--a2:#06b6d4;--shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px rgba(15,23,42,.06);--radius:16px;
--glow:rgba(79,70,229,.10)}
[data-theme=dark]{--bg:#0a0e1a;--bg2:#0f1424;--card:#131a2d;--text:#e8ecf7;--muted:#9aa4bd;--line:#222b44;
--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);--glow:rgba(99,102,241,.18)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.65;
-webkit-font-smoothing:antialiased;transition:background .2s,color .2s}
a{color:var(--a1);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;border-radius:12px}
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--a1),var(--a2));z-index:50}

/* header */
header{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--bg) 86%,transparent);
backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;letter-spacing:-.02em;color:var(--text)}
.logo:hover{text-decoration:none}
.mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;color:#fff;font-weight:800;
background:linear-gradient(135deg,var(--a1),var(--a2))}
nav{display:flex;align-items:center;gap:6px}
nav a.nl{color:var(--muted);font-weight:500;font-size:.95rem;padding:8px 12px;border-radius:10px}
nav a.nl:hover,nav a.nl.active{color:var(--text);background:var(--bg2);text-decoration:none}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--card);
color:var(--text);cursor:pointer;font-size:1rem;display:grid;place-items:center}
.icon-btn:hover{border-color:var(--a1)}
.menu-btn{display:none}
.sun{display:none}[data-theme=dark] .sun{display:inline}[data-theme=dark] .moon{display:none}

/* hero */
.hero{padding:72px 0 40px;background:radial-gradient(60% 80% at 80% 0%,var(--glow),transparent 70%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
color:var(--a1);background:var(--bg2);border:1px solid var(--line);padding:6px 14px;border-radius:999px}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.08;letter-spacing:-.035em;margin:20px 0 16px}
.grad{background:linear-gradient(90deg,var(--a1),var(--a2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:1.15rem;max-width:560px;margin:0 0 28px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 22px;border-radius:12px;font-weight:600;border:1px solid var(--line);
color:var(--text);background:var(--card);cursor:pointer;font:inherit;font-weight:600}
.btn:hover{text-decoration:none;border-color:var(--a1)}
.btn.primary{background:linear-gradient(135deg,var(--a1),var(--a2));border:none;color:#fff}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stats b{display:block;font-size:1.7rem;letter-spacing:-.02em}
.stats span{color:var(--muted);font-size:.9rem}

/* sections + cards */
section{padding:44px 0}
section.alt{background:var(--bg2)}
.sec-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:24px;gap:12px}
.sec-head h2{margin:0;font-size:1.65rem;letter-spacing:-.02em}
.sec-head p{margin:4px 0 0;color:var(--muted)}
.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
display:flex;flex-direction:column;overflow:hidden;transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-3px);border-color:var(--a1)}
.thumb{display:block;height:150px;position:relative;
background:linear-gradient(135deg,hsl(var(--h) 80% 58%),hsl(calc(var(--h) + 45) 85% 52%))}
.thumb span{position:absolute;left:18px;bottom:14px;color:rgba(255,255,255,.92);font-weight:800;font-size:1.3rem;
letter-spacing:-.01em;text-shadow:0 2px 10px rgba(0,0,0,.2)}
.thumb:hover{text-decoration:none}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.card h3{margin:10px 0 8px;font-size:1.15rem;line-height:1.3;letter-spacing:-.01em}
.card h3 a{color:var(--text)}
.card p{color:var(--muted);margin:0 0 14px;font-size:.95rem}
.meta{color:var(--muted);font-size:.85rem;margin-top:auto}
.tag{display:inline-block;font-size:.75rem;font-weight:700;color:var(--a1);
background:color-mix(in srgb,var(--a1) 12%,transparent);padding:4px 10px;border-radius:999px;align-self:flex-start}
.feature .thumb{height:230px}
.cat-card{padding:22px;text-decoration:none;color:var(--text)}
.cat-card:hover{text-decoration:none}
.cat-card b{display:block;font-size:1.1rem}
.cat-card span{color:var(--muted);font-size:.9rem}
.pills{display:flex;gap:10px;flex-wrap:wrap}
.pill{padding:8px 16px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--muted);font-weight:600;font-size:.9rem}

/* tools */
.tool-top{display:flex;justify-content:space-between;align-items:start;gap:10px}
.tool-top h3{margin:8px 0 0}
.score{font-weight:800;color:var(--a1);font-size:1.05rem}
.bar{height:6px;background:var(--line);border-radius:999px;overflow:hidden;margin:12px 0 14px}
.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--a1),var(--a2))}
.pc{margin:0 0 14px;padding:0;list-style:none;font-size:.9rem;color:var(--muted)}
.pc li{padding-left:20px;position:relative;margin:4px 0}
.pc li.pro::before{content:"+";position:absolute;left:2px;color:#16a34a;font-weight:800}
.pc li.con::before{content:"\2212";position:absolute;left:2px;color:#dc2626;font-weight:800}

/* filters */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:26px}
.toolbar input,.toolbar select{padding:11px 14px;border-radius:12px;border:1px solid var(--line);background:var(--card);
color:var(--text);font:inherit;min-width:220px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{cursor:pointer;font:inherit;font-size:.9rem;padding:8px 16px;border-radius:999px;border:1px solid var(--line);
background:var(--card);color:var(--muted);font-weight:600}
.chip.on,.chip:hover{color:#fff;background:var(--a1);border-color:var(--a1)}
.empty{display:none;color:var(--muted);padding:30px;text-align:center}

/* newsletter */
.news{background:linear-gradient(135deg,color-mix(in srgb,var(--a1) 16%,var(--card)),color-mix(in srgb,var(--a2) 12%,var(--card)));
border:1px solid var(--line);border-radius:24px;padding:46px 28px;text-align:center}
.news h2{margin:0 0 8px;font-size:1.8rem;letter-spacing:-.02em}
.news p{color:var(--muted);margin:0 auto 22px;max-width:520px}
.newsletter-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.newsletter-form input{padding:13px 16px;border-radius:12px;border:1px solid var(--line);background:var(--bg);
color:var(--text);min-width:270px;font:inherit}
.thanks{color:var(--a1);font-weight:700}

/* article */
.crumbs{font-size:.88rem;color:var(--muted);margin:30px 0 10px}
.crumbs a{color:var(--muted)}
.art-head{max-width:820px}
.art-head h1{font-size:clamp(2rem,4.5vw,3rem);line-height:1.12;letter-spacing:-.03em;margin:14px 0}
.art-layout{display:grid;grid-template-columns:minmax(0,740px) 260px;gap:56px;align-items:start;margin-bottom:30px}
.article{font-size:1.08rem}
.article h2{margin:40px 0 12px;font-size:1.55rem;letter-spacing:-.02em;scroll-margin-top:90px}
.article h3{margin:28px 0 8px;font-size:1.2rem;scroll-margin-top:90px}
.article p,.article li{color:color-mix(in srgb,var(--text) 88%,var(--muted))}
.article ul,.article ol{padding-left:22px}
.article code{background:var(--bg2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;font-size:.92em}
.article pre{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:16px;overflow:auto}
.article pre code{border:0;background:none;padding:0}
.callout{background:var(--bg2);border:1px solid var(--line);border-left:4px solid var(--a1);border-radius:12px;padding:16px 20px;margin:26px 0}
.callout p{margin:0}
.toc{position:sticky;top:92px;border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--card)}
.toc b{display:block;margin-bottom:8px;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.toc a{display:block;color:var(--muted);font-size:.92rem;padding:5px 0}
.toc a:hover{color:var(--a1);text-decoration:none}
.author{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:18px;margin:36px 0;background:var(--card)}
.author .mark{width:46px;height:46px;border-radius:50%}
.prose{max-width:760px}
.prose h1{font-size:2.6rem;letter-spacing:-.03em;line-height:1.1;margin:18px 0}
.prose h2{margin:34px 0 10px}
.prose p,.prose li{font-size:1.08rem;color:color-mix(in srgb,var(--text) 88%,var(--muted))}
.note{font-size:.85rem;color:var(--muted);margin-top:20px}

/* footer */
footer{border-top:1px solid var(--line);margin-top:30px;padding:48px 0 30px;background:var(--bg2)}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot p{color:var(--muted);font-size:.93rem;max-width:300px}
.foot h4{margin:0 0 12px;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.foot a{display:block;color:var(--text);font-size:.93rem;padding:4px 0}
.copy{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;color:var(--muted);font-size:.85rem}

@media(max-width:900px){
.hero-grid,.art-layout{grid-template-columns:1fr}.toc{display:none}.foot{grid-template-columns:1fr 1fr}
.menu-btn{display:grid}
nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);
border-bottom:1px solid var(--line);padding:12px 22px;display:none}
.menu-open nav{display:flex}
}