:root{
--bg:#f8f9fd;--bg2:#ffffff;--card:#ffffff;--border:#e4e7f0;--border-soft:#eef0f7;
--text:#232323;--text-dim:#4c4f5a;--muted:#6b7280;--faint:#9ca3af;
--accent:#4338ca;--accent-dark:#3730a3;--accent-soft:rgba(67,56,202,.08);--accent-line:rgba(67,56,202,.28);
--hero-ink:#1e1b4b;
--green:#1e9e6a;--green-bg:rgba(30,158,106,.1);
--amber:#b97f1a;--amber-bg:rgba(185,127,26,.12);
--red:#c0392b;--red-bg:rgba(192,57,43,.08);
--radius:14px;--radius-lg:20px;--nav-h:64px;
--shadow:0 2px 14px rgba(67,56,202,.06);
--shadow-lg:0 10px 34px rgba(67,56,202,.10);
--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
img{max-width:100%}
::selection{background:var(--accent-soft)}

/* announce bar */
.announce{background:var(--accent);color:#fff;font-size:13px;font-weight:600;text-align:center;padding:9px 12px;line-height:1.4}
.announce .announce-sub{font-weight:400;opacity:.8}
@media (max-width:640px){.announce .announce-sub{display:none}}

/* nav */
.nav{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border);height:var(--nav-h);box-shadow:0 1px 8px rgba(67,56,202,.06)}
.nav-inner{max-width:1120px;margin:0 auto;height:var(--nav-h);padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-name{font-weight:800;font-size:21px;letter-spacing:-.5px;color:var(--accent)}
.brand-mark{display:inline-flex}
.brand-logo{display:block}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{text-decoration:none;color:var(--text-dim);font-size:14.5px;font-weight:600;padding:9px 13px;border-radius:9px;white-space:nowrap}
.nav-links a:hover{color:var(--accent);background:var(--accent-soft)}
.nav-links a.active{color:var(--accent);background:transparent}
.nav-cta{border-radius:999px;padding:10px 24px;font-size:14.5px;flex-shrink:0}
@media (max-width:900px){.nav-cta{display:none}}
.hamburger{display:none;background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px;cursor:pointer}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);margin:4px 0;border-radius:2px}
.hamburger span:first-child{margin-top:0}
.hamburger span:last-child{margin-bottom:0}
@media (max-width:900px){
.hamburger{display:block}
.nav-links{position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch;padding:8px;display:none;box-shadow:var(--shadow-lg)}
.nav-links.open{display:flex}
.nav-links a{padding:12px 14px;font-size:16px}}

/* layout */
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
.section{padding:48px 0}
.section-title{font-size:27px;font-weight:800;letter-spacing:-.5px;margin:0 0 6px;color:var(--text)}
.section-sub{color:var(--muted);margin:0 0 26px;max-width:660px}
.page-head{padding:44px 0 10px}
.page-head h1{font-size:33px;margin:0 0 10px;letter-spacing:-.5px;color:var(--text)}
.page-head p{color:var(--muted);margin:0;max-width:700px;font-size:17px}
.crumb{font-size:13.5px;color:var(--faint);margin-bottom:10px}
.crumb a{color:var(--accent);text-decoration:none;font-weight:600}
.crumb a:hover{text-decoration:underline}

/* hero - soft pale indigo gradient, dark navy headline */
.hero-band{background:linear-gradient(115deg,#dfe6ff 0%,#eef2ff 45%,#ffffff 100%);color:var(--text);text-align:center;padding:88px 20px 80px;position:relative;overflow:hidden}
.hero-band::before{content:"";position:absolute;right:-70px;top:-70px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(129,140,248,.35),rgba(129,140,248,0) 70%);pointer-events:none}
.hero-band::after{content:"";position:absolute;left:-90px;bottom:-110px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(165,180,252,.4),rgba(165,180,252,0) 70%);pointer-events:none}
.hero-band .wrap{position:relative;z-index:1}
.hero-band .hero-kicker{display:inline-block;font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase;background:var(--accent-soft);border:1px solid var(--accent-line);color:var(--accent);border-radius:999px;padding:7px 18px;margin-bottom:20px}
.hero-band h1{font-size:clamp(36px,6vw,58px);font-weight:800;letter-spacing:-1.5px;line-height:1.08;margin:0 0 16px;color:var(--hero-ink)}
.hero-band p.lead{color:var(--text-dim);font-size:18.5px;max-width:640px;margin:0 auto 30px;line-height:1.65}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-cta .btn{border-radius:999px}
.hero-chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.hero-chip{background:#fff;border:1px solid var(--border);color:var(--text-dim);border-radius:999px;padding:8px 18px;font-size:13.5px;font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:12px;font-weight:700;font-size:15px;text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:var(--font);transition:background .15s,transform .15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-white{background:var(--accent);color:#fff}
.btn-white:hover{background:var(--accent-dark)}
.btn-outline-w{background:transparent;color:var(--accent);border-color:var(--accent-line)}
.btn-outline-w:hover{background:var(--accent-soft)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:8px 14px;font-size:13.5px;border-radius:9px}
.btn:disabled{opacity:.5;cursor:default}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:860px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);text-decoration:none;color:var(--text);display:block;transition:transform .18s,box-shadow .18s,border-color .18s;position:relative}
a.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--accent-line)}
.card h3{margin:0 0 8px;font-size:18px;color:var(--text)}
.card p{color:var(--muted);margin:0;font-size:15px}
.card .glyph{width:46px;height:46px;border-radius:13px;background:var(--accent-soft);color:var(--accent);font-weight:800;font-size:17px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-family:var(--mono)}
.card .go{color:var(--accent);font-weight:700;font-size:14px;margin-top:14px;display:inline-block}
.card .tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:6px;padding:4px 10px;margin-bottom:12px}

/* stat grid */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0}
@media (max-width:760px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px 16px;box-shadow:var(--shadow);text-align:center}
.stat-card .num{font-family:var(--mono);font-size:27px;font-weight:700;color:var(--accent)}
.stat-card .lbl{color:var(--muted);font-size:13px;margin-top:4px}

/* tool box */
.tool-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow);margin:26px 0}
@media (max-width:640px){.tool-box{padding:22px 18px}}
.tool-box textarea{width:100%;min-height:190px;resize:vertical}
.tool-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;align-items:center}
.out-box{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:18px;font-family:var(--mono);font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word;max-height:340px;overflow-y:auto;margin-top:14px;color:var(--text)}
.out-list{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px}
.out-list li{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-family:var(--mono);font-size:13.5px;display:flex;justify-content:space-between;align-items:center;gap:10px;word-break:break-all}
.opt-row{display:flex;align-items:center;gap:12px;margin:12px 0;flex-wrap:wrap;font-size:15px;color:var(--text-dim)}
.opt-row label{font-weight:600}
.check-row{display:flex;align-items:center;gap:10px;margin:10px 0;font-size:15px;color:var(--text-dim);cursor:pointer}
.check-row input{width:19px;height:19px;accent-color:var(--accent);cursor:pointer}
input[type=range]{accent-color:var(--accent);width:100%}
.range-row{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;margin:14px 0}
.range-val{font-family:var(--mono);font-weight:700;font-size:18px;color:var(--accent);min-width:52px;text-align:right}
input[type=date],input[type=email],input[type=number],input[type=text],select,textarea{background:#fff;border:1px solid var(--border);border-radius:12px;color:var(--text);padding:12px 14px;font-size:15px;font-family:var(--font)}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field{margin:12px 0}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text)}
.field input,.field select,.field textarea{width:100%}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:640px){.two-col{grid-template-columns:1fr}}
.pills{display:flex;gap:8px;margin:4px 0 8px}
.pill{flex:1;background:#fff;border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:10px;font-size:14px;font-weight:700;cursor:pointer;font-family:var(--font)}
.pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.result-line{font-size:15px;color:var(--text-dim);margin:10px 0}
.result-line b{color:var(--text)}
.big-result{text-align:center;padding:26px 16px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);margin:18px 0}
.big-result .val{font-size:44px;font-weight:800;color:var(--accent);font-family:var(--mono)}
.big-result .cat{font-size:17px;font-weight:700;margin-top:6px}
.cat-ok{color:var(--green)}.cat-warn{color:var(--amber)}.cat-bad{color:var(--red)}
.error-text{color:var(--red);font-size:14px;margin-top:8px;font-weight:600}
.hint{font-size:13px;color:var(--faint);margin-top:8px}
.copy-btn{background:#fff;border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:6px 12px;font-size:12.5px;font-weight:600;cursor:pointer;font-family:var(--font);white-space:nowrap}
.copy-btn:hover{color:var(--accent);border-color:var(--accent)}

/* content */
.content-block{max-width:780px}
.content-block h2{font-size:22px;margin:36px 0 12px;color:var(--text)}
.content-block h3{font-size:17px;margin:24px 0 8px;color:var(--text)}
.content-block li,.content-block p{color:var(--text-dim);line-height:1.75}
.content-block p{margin:0 0 16px}
.content-block ul,.content-block ol{padding-left:22px;margin:0 0 18px;color:var(--text-dim)}
.content-block li{margin-bottom:8px}
.content-block a{color:var(--accent);font-weight:600}

/* blog */
.post-meta{color:var(--muted);font-size:13.5px;margin:0 0 10px}
.page-head .lead{font-size:18px;color:var(--text-dim);max-width:680px;line-height:1.65}
.blog-date{display:block;color:var(--muted);font-size:13px;margin-top:12px}
.related{margin:34px 0}
.related h2{font-size:20px;margin:0 0 14px}

/* faq */
.faq-list{max-width:780px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden;box-shadow:var(--shadow)}
.faq-item summary{padding:18px 20px;font-weight:700;font-size:16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--text)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--accent);flex-shrink:0;font-weight:400}
.faq-item[open] summary::after{content:"-"}
.faq-item .faq-body{padding:0 20px 20px;color:var(--text-dim);font-size:15px}
.faq-item .faq-body p{margin:0 0 10px}
.faq-item .faq-body p:last-child{margin-bottom:0}

/* why section */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:900px){.why-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.why-grid{grid-template-columns:1fr}}
.why-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.why-card h3{margin:0 0 8px;font-size:16.5px;color:var(--accent)}
.why-card p{margin:0;color:var(--muted);font-size:14.5px}

/* footer - light gray */
.footer{background:#eef0f4;color:#4b5563;margin-top:56px}
.footer-grid{max-width:1120px;margin:0 auto;padding:48px 16px 10px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr}}
.footer h2{margin:0 0 14px;font-size:12.5px;text-transform:uppercase;letter-spacing:1.5px;color:#1f2937}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin:9px 0}
.footer a{color:#4b5563;text-decoration:none;font-size:14.5px}
.footer a:hover{color:var(--accent)}
.footer-brand .brand-name{color:#1f2937}
.footer-brand p{color:#6b7280;font-size:14px;max-width:300px}
.footer-bottom{max-width:1120px;margin:0 auto;padding:20px 16px 28px;border-top:1px solid #dfe3ea;margin-top:26px;color:#6b7280;font-size:13px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* toast */
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:#232323;color:#fff;font-weight:600;font-size:14px;padding:12px 22px;border-radius:999px;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:400;max-width:90vw;text-align:center;box-shadow:0 8px 30px rgba(0,0,0,.25)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* misc */
.center{text-align:center}
.mt{margin-top:26px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.band-cta{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:38px 30px;text-align:center;margin:40px 0}
.band-cta h2{margin:0 0 10px;font-size:24px}
.band-cta p{color:var(--muted);margin:0 0 20px}

/* ---------- blog (magazine layout) ---------- */
.blog-hero{padding:44px 0 8px;max-width:1120px}
.blog-badge{display:inline-flex;align-items:center;font-size:11px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);border:1px solid var(--accent-line);background:var(--accent-soft);border-radius:999px;padding:6px 14px}
.blog-hero h1{font-size:clamp(32px,5vw,48px);font-weight:800;letter-spacing:-1px;line-height:1.1;margin:16px 0 12px;color:var(--hero-ink)}
.blog-hero .lead{color:var(--muted);font-size:16.5px;max-width:600px;margin:0}
.blog-stats{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.blog-stat{background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px 22px;text-align:center;box-shadow:var(--shadow)}
.blog-stat b{display:block;color:var(--accent);font-size:22px;font-weight:800}
.blog-stat span{color:var(--faint);font-size:11px;letter-spacing:1.5px;text-transform:uppercase}
.section-label{margin:34px 0 16px;display:flex;align-items:center;gap:12px}
.section-label span{font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--faint)}
.section-label::after{content:"";flex:1;height:1px;background:var(--border)}
.topic-pills{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 4px}
.topic-pill{background:#fff;border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:8px 18px;font-size:13.5px;font-weight:600;cursor:pointer;font-family:var(--font)}
.topic-pill:hover{color:var(--accent);border-color:var(--accent-line)}
.topic-pill.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.featured-card{position:relative;display:block;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);text-decoration:none;border:1px solid var(--border)}
.featured-card img{width:100%;height:auto;aspect-ratio:21/9;object-fit:cover;display:block}
.featured-badge{position:absolute;top:16px;left:16px;background:#fff;color:var(--accent);font-size:11px;font-weight:800;letter-spacing:1.5px;border-radius:7px;padding:6px 12px;box-shadow:var(--shadow)}
.f-overlay{position:absolute;inset:auto 0 0 0;padding:56px 28px 24px;background:linear-gradient(transparent,rgba(30,27,75,.88));color:#fff}
.f-overlay .f-cat{display:inline-block;font-size:11px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:#c7d2fe;margin-bottom:8px}
.f-overlay h2{margin:0 0 10px;font-size:clamp(20px,3.4vw,30px);color:#fff;line-height:1.25}
.f-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:13.5px;color:#e0e7ff}
.f-read{font-weight:700;color:#fff}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:900px){.article-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.article-grid{grid-template-columns:1fr}}
.g-card{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-decoration:none;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.g-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.g-img{position:relative;display:block}
.g-img img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block}
.g-cat{position:absolute;left:12px;bottom:12px;background:#fff;color:var(--accent);font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;border-radius:6px;padding:4px 10px}
.g-time{position:absolute;right:12px;bottom:12px;background:rgba(30,27,75,.75);color:#fff;font-size:11.5px;font-weight:600;border-radius:6px;padding:4px 10px}
.g-body{display:block;padding:18px 20px 20px}
.g-body h3{margin:0 0 8px;font-size:17px;color:var(--text);line-height:1.4}
.g-body p{margin:0 0 10px;font-size:14px;color:var(--muted);line-height:1.6}
.g-date{font-size:12.5px;color:var(--faint)}
/* post page: article + sidebar */
.post-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;max-width:1120px}
.post-layout>*{min-width:0}
@media(min-width:1024px){.post-layout{grid-template-columns:minmax(0,1fr) 300px;align-items:start}}
.post-main .content-block{max-width:100%}
.post-thumb{width:100%;height:auto;aspect-ratio:21/9;object-fit:cover;border-radius:var(--radius);border:1px solid var(--border);margin:6px 0 8px}
.post-sidebar{position:static}
@media(min-width:1024px){.post-sidebar{position:sticky;top:84px}}
.post-sidebar h3{margin:4px 0 14px;font-size:15px;color:var(--text);text-transform:uppercase;letter-spacing:1px}
.related-list{display:grid;gap:10px}
.related-card{display:flex;gap:12px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px 12px;text-decoration:none;box-shadow:var(--shadow)}
.related-card:hover{border-color:var(--accent-line)}
.related-card img{width:96px;height:54px;object-fit:cover;border-radius:8px;flex-shrink:0}
.related-card strong{display:block;color:var(--text);font-size:13.5px;line-height:1.4;margin-bottom:4px}
.related-card span{color:var(--faint);font-size:11.5px}
.author-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-top:32px;box-shadow:var(--shadow)}
.author-box h2{font-size:18px;margin:0 0 8px;color:var(--text)}
.author-box p{margin:0;color:var(--muted);font-size:15px}

/* new full-lockup logo */
.brand{min-width:0;flex:0 1 auto}
.brand-logo-full{display:block;height:32px;width:auto;max-width:100%}
.footer-brand .brand-logo-full{height:28px}
@media(max-width:640px){.brand-logo-full{height:24px}.footer-brand .brand-logo-full{height:24px}}