:root{
  --ink:#0b1b3a;--ink-2:#3b4a66;--muted:#6b7891;--line:#e3e8f1;--bg:#f6f8fc;--card:#fff;
  --brand:#0b3d91;--brand-2:#1fa2ff;--accent:#ff6b35;--ok:#11875d;--bad:#c8312b;--warn:#b7791f;
  --radius:14px;--shadow:0 1px 2px rgba(11,27,58,.06),0 6px 20px rgba(11,27,58,.06);
  --serif:Georgia,"Times New Roman",serif;--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 var(--sans);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--accent)}
h1,h2,h3,h4,h5,h6{font-family:var(--serif);line-height:1.25;margin:1.6em 0 .55em;color:var(--ink)}
h1{font-size:clamp(1.9rem,4vw,2.8rem);margin-top:.3em}
h2{font-size:clamp(1.4rem,2.6vw,1.8rem)}
h3{font-size:1.25rem}h4{font-size:1.1rem}h5{font-size:1rem;text-transform:uppercase;letter-spacing:.06em}h6{font-size:.9rem;color:var(--muted)}
.wrap{max-width:1240px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 14px;z-index:99}.skip:focus{left:10px}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:10px 18px;font:600 15px var(--sans);cursor:pointer;text-decoration:none;transition:background .15s}
.btn:hover{background:#082c6b;color:#fff}.btn.ghost{background:transparent;color:var(--brand);box-shadow:inset 0 0 0 2px var(--brand)}
.btn.sm{padding:6px 12px;font-size:13px}.btn.alt{background:var(--accent)}
.pill{display:inline-block;background:#e8efff;color:var(--brand);font:700 11px/1 var(--sans);letter-spacing:.06em;text-transform:uppercase;padding:6px 10px;border-radius:99px;text-decoration:none}
.pill.sm{font-size:10px;padding:4px 7px}
.more{font-weight:600;text-decoration:none}

/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.hdr{display:flex;align-items:center;gap:20px;padding-top:10px;padding-bottom:10px}
.logo img{height:45px;width:auto}
.hdr-search{margin-left:auto;display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--bg)}
.hdr-search input{border:0;background:transparent;padding:9px 12px;width:260px;font:inherit}
.hdr-search button{border:0;background:transparent;padding:0 12px;cursor:pointer}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:22px;padding:4px 12px;cursor:pointer}
.nav{background:var(--brand)}
.menu{list-style:none;display:flex;flex-wrap:wrap;margin:0 auto;padding-top:0;padding-bottom:0}
.menu>li{position:relative}
.menu>li>a,.dd-toggle{display:flex;align-items:center;gap:4px;color:#fff;text-decoration:none;font:600 14.5px var(--sans);padding:13px 14px;background:none;border:0;cursor:pointer}
.menu>li>a:hover,.dd-toggle:hover,.has-dd:focus-within>.dd-toggle{background:rgba(255,255,255,.12);color:#fff}
.caret{font-size:11px;opacity:.8}
.dd{display:none;position:absolute;left:0;top:100%;min-width:230px;background:#fff;list-style:none;margin:0;padding:8px;border-radius:0 0 12px 12px;box-shadow:0 14px 40px rgba(11,27,58,.18);max-height:72vh;overflow:auto}
.dd.mega{min-width:560px;columns:2;column-gap:8px}
.dd a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:14px;break-inside:avoid}
.dd a:hover{background:var(--bg);color:var(--brand)}
@media (hover:hover) and (min-width:961px){.has-dd:hover>.dd{display:block}}
.has-dd.open>.dd{display:block}
.menu>li:nth-last-child(-n+4) .dd{left:auto;right:0}

/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;padding-top:24px;padding-bottom:48px}
.layout.full{grid-template-columns:minmax(0,1fr)}
main{min-width:0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0 0 10px;font-size:13px;color:var(--muted)}
.crumbs li+li:before{content:"›";margin-right:6px}
.crumbs a{color:var(--muted);text-decoration:none}
.page-head{margin-bottom:20px}.page-head h1{margin-bottom:.2em}
.lede{font-size:1.12rem;color:var(--ink-2)}

/* hero + cards */
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center;background:linear-gradient(135deg,#0b3d91,#1268c9 60%,#1fa2ff);color:#fff;border-radius:22px;padding:34px;margin-bottom:28px}
.hero h1{color:#fff}.hero p{color:#e5eeff}.kicker{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:700}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap}.hero .btn{background:#fff;color:var(--brand)}.hero .btn.ghost{background:transparent;color:#fff;box-shadow:inset 0 0 0 2px #fff}
.hero-feat{position:relative;border-radius:16px;overflow:hidden;color:#fff;text-decoration:none;display:block}
.hero-feat strong{position:absolute;left:16px;right:16px;bottom:14px;font:700 1.25rem var(--serif);text-shadow:0 2px 10px rgba(0,0,0,.4)}
.hero-feat .pill{position:absolute;left:16px;top:14px}
.sec-title{border-left:5px solid var(--accent);padding-left:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s}
.card:hover{transform:translateY(-3px)}
.card-img img{aspect-ratio:1200/630;object-fit:cover;width:100%}
.card-body{padding:14px 16px 16px}
.card h3{font-size:1.08rem;margin:.5em 0 .35em}.card h3 a{color:var(--ink);text-decoration:none}.card h3 a:hover{color:var(--brand)}
.card p{font-size:14px;color:var(--ink-2);margin:0 0 8px}.card time{font-size:12.5px;color:var(--muted)}
.cat-block{margin-top:34px}.cat-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:2px solid var(--line);margin-bottom:14px}
.cat-head h2{margin:0 0 6px}.cat-head h2 a{color:var(--ink);text-decoration:none}

/* post */
.post,.page,.tool-page{background:#fff;border-radius:18px;box-shadow:var(--shadow);padding:clamp(18px,4vw,42px)}
.post-head .meta{color:var(--muted);font-size:14px}
.post-body{font-size:1.06rem}
.post-body p{margin:0 0 1.1em}
.art-fig{margin:26px 0}.art-fig img{border-radius:12px;width:100%}
.art-fig figcaption{font-size:13.5px;color:var(--muted);margin-top:6px;text-align:center}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:20px 0}
.toc summary{font:700 1.05rem var(--serif);cursor:pointer}
.toc ol{margin:10px 0 0;padding-left:20px;columns:2;column-gap:28px;font-size:14.5px}
.toc li{break-inside:avoid;margin:2px 0}.toc .toc-l3{margin-left:14px;list-style:circle;font-size:13.5px}
.table-wrap{overflow-x:auto;margin:18px 0}
table{border-collapse:collapse;width:100%;font-size:14.5px}
caption{font-weight:700;text-align:left;margin-bottom:8px}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
th{background:#eef3ff}
tbody tr:nth-child(even){background:#fafbfe}
blockquote{border-left:4px solid var(--accent);margin:24px 0;padding:10px 20px;background:#fff7f2;font:italic 1.15rem var(--serif)}
blockquote cite{display:block;font:600 13px var(--sans);color:var(--muted);margin-top:6px}
.checklist li{margin:6px 0}
.terms li{margin:4px 0}
.faq{border:1px solid var(--line);border-radius:12px;padding:4px 18px;margin:12px 0}
.faq h3{font-size:1.08rem;margin:.9em 0 .3em}
.takeaways{background:#eef7f2;border-radius:12px;padding:6px 20px 12px;margin-top:20px}
.quiz{border:1px dashed #b8c4dc;border-radius:12px;padding:12px 16px;margin:14px 0}
.quiz-opts{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.quiz-opt{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;cursor:pointer;font:inherit}
.quiz-opt:hover{border-color:var(--brand)}.quiz-opt.right{background:#e3f6ec;border-color:var(--ok)}.quiz-opt.wrong{background:#fde8e7;border-color:var(--bad)}
.quiz-result{font-weight:600;margin:4px 0 0}
.share{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:16px 0;font-size:13px}
.sh{display:inline-block;padding:6px 11px;border-radius:8px;color:#fff;text-decoration:none;font-weight:600;border:0;cursor:pointer;font-size:13px}
.sh:hover{color:#fff;filter:brightness(1.1)}
.sh-fb{background:#1877f2}.sh-x{background:#111}.sh-in{background:#0a66c2}.sh-wa{background:#25d366}.sh-tg{background:#229ed9}.sh-pin{background:#e60023}.sh-rd{background:#ff4500}.sh-em{background:#6b7891}.sh-copy{background:var(--accent)}
.author-box{display:flex;gap:16px;align-items:center;background:var(--bg);border-radius:12px;padding:16px;margin:24px 0}
.author-box img{border-radius:50%}.author-box p{margin:4px 0 0;font-size:14px}
.prevnext{display:flex;justify-content:space-between;gap:16px;font-weight:600;font-size:14.5px}
.related{margin-top:30px}
.updated{color:var(--muted);font-size:13px;margin-top:30px}

/* sidebar */
.sidebar{display:flex;flex-direction:column;gap:20px}
.widget{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.w-title{font-size:1.05rem;margin:0 0 12px;padding-bottom:8px;border-bottom:2px solid var(--line);font-family:var(--sans);text-transform:uppercase;letter-spacing:.06em}
.w-sub{font:700 13px var(--sans);margin:14px 0 8px;color:var(--muted);text-transform:uppercase}
.side-search{display:flex;gap:6px}.side-search input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:9px 12px;font:inherit}
.side-search.big{margin:10px 0 20px}.side-search.big input{padding:13px 16px;font-size:1.05rem}
.socials{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.soc{display:block;text-align:center;color:#fff;text-decoration:none;border-radius:8px;padding:7px 4px;font:600 12.5px var(--sans)}
.soc:hover{color:#fff;filter:brightness(1.1)}
.soc-fb{background:#1877f2}.soc-x{background:#111}.soc-ig{background:linear-gradient(45deg,#f58529,#dd2a7b,#8134af)}.soc-yt{background:#ff0000}.soc-in{background:#0a66c2}.soc-tt{background:#010101}.soc-tg{background:#229ed9}.soc-wa{background:#25d366}.soc-pin{background:#e60023}.soc-rd{background:#ff4500}
.post-list{list-style:none;margin:0;padding:0}.post-list li+li{border-top:1px solid var(--line)}
.post-list a{display:flex;gap:10px;padding:9px 0;text-decoration:none;color:var(--ink);font-size:14px;line-height:1.35}
.post-list img{width:72px;height:38px;object-fit:cover;border-radius:6px;flex:none}
.post-list small{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.archive-list{list-style:none;padding:0;margin:0;max-height:260px;overflow:auto;font-size:14px}.archive-list li{padding:3px 0}.archive-list span{color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:12.5px;background:var(--bg);border:1px solid var(--line);border-radius:99px;padding:4px 10px;text-decoration:none;color:var(--ink)}
.tag span{color:var(--muted)}.tag:hover{border-color:var(--brand)}
.tool-picks{list-style:none;padding:0;margin:0 0 8px;font-size:14px}.tool-picks li{padding:4px 0}.tool-picks a{text-decoration:none}
.contact-form{display:flex;flex-direction:column;gap:10px}
.contact-form label{display:flex;flex-direction:column;font-size:13px;font-weight:600;gap:4px}
.contact-form input,.contact-form textarea{border:1px solid var(--line);border-radius:10px;padding:9px 12px;font:inherit;font-weight:400}
.hp{display:none}
.ad-slot{min-height:0;margin:20px 0}.ad-slot.ad-auto{margin:0}
.ad-label{display:block;font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);text-align:center;margin-bottom:4px}

/* tools */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.tool-card{display:flex;flex-direction:column;gap:4px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.tool-card:hover{border-color:var(--brand);transform:translateY(-2px);color:var(--ink)}
.tool-card small{color:var(--muted);font-size:12.5px;line-height:1.4}
.t-ico{font-size:24px}.t-ico.big{font-size:44px}
.tool-group{margin-top:26px}.tool-group h2 a{color:var(--ink);text-decoration:none}
.tool-app{background:linear-gradient(180deg,#f3f7ff,#fff);border:1px solid #d6e2fb;border-radius:16px;padding:clamp(14px,3vw,26px);margin:18px 0}
.tool-app label{display:block;font-weight:600;font-size:14px;margin:8px 0 4px}
.tool-app input[type=text],.tool-app input[type=number],.tool-app input[type=url],.tool-app input[type=password],.tool-app select,.tool-app textarea{width:100%;border:1px solid #c9d5ee;border-radius:10px;padding:10px 12px;font:inherit;background:#fff}
.tool-app textarea{font-family:var(--mono);font-size:14px;min-height:140px}
.tool-app .row{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.tool-app .row>*{flex:1 1 160px}
.tool-app .row>.btn{flex:0 0 auto}
.tool-app .actions{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.out{margin-top:14px;font-size:14.5px;overflow-x:auto}
.out pre,.mono{font-family:var(--mono);font-size:13.5px;background:#0b1b3a;color:#e2e9ff;padding:14px;border-radius:10px;overflow:auto;white-space:pre-wrap;word-break:break-word}
.out table{background:#fff}
.ok{color:var(--ok);font-weight:700}.bad{color:var(--bad);font-weight:700}.warn{color:var(--warn);font-weight:700}
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:8px;margin-top:10px}
.sw{border-radius:10px;padding:34px 6px 6px;font:12px var(--mono);color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.5);cursor:pointer;text-align:center}
.kbd{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}
.kbd button{min-width:42px;padding:9px;border:1px solid #c9d5ee;border-radius:8px;background:#fff;font-size:18px;cursor:pointer}
.frames{display:flex;gap:16px;overflow-x:auto;padding:8px 0}
.frames figure{margin:0;flex:none}.frames iframe{border:8px solid #0b1b3a;border-radius:14px;background:#fff;transform-origin:0 0}
.meter{height:10px;background:var(--line);border-radius:99px;overflow:hidden}.meter i{display:block;height:100%;transition:width .2s}
.ext-links{columns:2}
.cols{columns:3;column-gap:24px}
.sitemap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:4px 24px;font-size:14px}
.sitemap-grid h2{font-size:1.1rem}
.arch ul{list-style:none;padding:0}.arch li{padding:4px 0;border-bottom:1px solid var(--line);font-size:14.5px}.arch time{color:var(--muted);font-size:13px;margin-right:6px}
.search-results .card{flex-direction:row}.search-results .card-img{flex:0 0 160px}
.search-results{display:grid;gap:12px}

/* footer */
.site-footer{background:#081633;color:#c8d3ea;margin-top:20px;font-size:14px}
.site-footer a{color:#c8d3ea;text-decoration:none}.site-footer a:hover{color:#fff}
.f-top{display:flex;gap:30px;align-items:center;padding-top:34px;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.1)}
.f-desc{max-width:720px;margin:0}
.f-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:4px 26px;padding-top:20px;padding-bottom:30px}
.f-col h3{color:#fff;font:700 13px var(--sans);text-transform:uppercase;letter-spacing:.08em;margin:18px 0 8px}
.f-col ul{list-style:none;margin:0;padding:0}.f-col li{padding:2.5px 0}
.f-bottom{background:#050e22;padding:16px 0;text-align:center}

@media (max-width:960px){
  .layout{grid-template-columns:1fr}
  .hero{grid-template-columns:1fr;padding:24px}
  .nav-toggle{display:block;margin-left:auto}
  .hdr-search{display:none}
  .nav{display:none}.nav.open{display:block}
  .menu{flex-direction:column;padding:6px 12px 12px;max-height:80vh;overflow:auto}
  .dd,.dd.mega{position:static;min-width:0;columns:1;box-shadow:none;border-radius:10px;max-height:none}
  .menu>li:nth-last-child(-n+4) .dd{right:auto}
  .toc ol{columns:1}.cols{columns:2}.ext-links{columns:1}
  .f-top{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  body{font-size:15.5px}.wrap{padding:0 14px}.cols{columns:1}
  .search-results .card{flex-direction:column}.search-results .card-img{flex:none}
  .prevnext{flex-direction:column}
}