:root{--ink:#0b1522;--muted:#5f6b78;--line:#dbe4ec;--panel:#f4f8fb;--brand:#0f6fff;--brand2:#1436c8;--accent:#14b8a6;--white:#fff;--max:1180px;--article:760px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.65}
a{color:#0b56c7;text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#073e93}img,svg{max-width:100%}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.7rem 1rem;z-index:1000;border:2px solid var(--ink)}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--max);margin:auto;padding:.8rem 1.2rem;display:flex;gap:1rem;align-items:center}
.logo{display:flex;align-items:center;gap:.65rem;text-decoration:none;color:var(--ink);font-weight:850;font-size:1.05rem}.logo-mark{width:34px;height:34px}
.nav{display:flex;gap:.2rem;align-items:center;margin-left:auto}.nav a{color:#243244;text-decoration:none;font-size:.91rem;font-weight:650;padding:.55rem .62rem;border-radius:.55rem}.nav a:hover{background:var(--panel)}
.menu-toggle{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:.6rem;padding:.55rem .7rem}
.button{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;text-decoration:none!important;border-radius:.65rem;padding:.78rem 1rem;font-weight:800;line-height:1.15;border:1px solid transparent}.button-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff!important;box-shadow:0 8px 22px rgba(15,111,255,.18)}.button-secondary{background:#fff;border-color:var(--line);color:var(--ink)!important}
.header-cta{white-space:nowrap;margin-left:.4rem}
.container{max-width:var(--max);margin:auto;padding:0 1.2rem}.hero{padding:5rem 0 3.3rem;background:radial-gradient(circle at 80% 20%,#d8f8f4 0,transparent 28%),radial-gradient(circle at 12% 0,#dce9ff 0,transparent 26%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:3rem;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.09em;font-size:.74rem;font-weight:900;color:#0f5ac8}.hero h1{font-size:clamp(2.4rem,5vw,4.8rem);line-height:1.03;letter-spacing:-.045em;margin:.4rem 0 1.2rem;max-width:900px}.hero p{font-size:1.18rem;color:#465569;max-width:720px}.hero-card{background:#0d1828;color:#fff;border-radius:1.2rem;padding:1.5rem;box-shadow:0 25px 60px rgba(13,24,40,.18)}.trail{display:grid;gap:.75rem}.trail-step{display:flex;align-items:center;gap:.7rem;padding:.8rem;background:rgba(255,255,255,.07);border-radius:.7rem}.dot{width:10px;height:10px;border-radius:50%;background:#58d9cc;box-shadow:0 0 0 5px rgba(88,217,204,.12)}
.section{padding:3.6rem 0}.section h2{font-size:clamp(1.7rem,3vw,2.5rem);line-height:1.15;letter-spacing:-.025em}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.card{border:1px solid var(--line);border-radius:1rem;padding:1.3rem;background:#fff;box-shadow:0 8px 25px rgba(12,25,45,.04)}.card h3{margin:.2rem 0 .6rem;line-height:1.25}.card p{color:var(--muted)}.card a.stretch{text-decoration:none;color:var(--ink)}.card a.stretch:hover{color:#0b56c7}
.breadcrumbs{font-size:.86rem;color:var(--muted);padding:1.25rem 0}.breadcrumbs a{color:#486079}
.page-head{padding:2rem 0 2.3rem;border-bottom:1px solid var(--line)}.page-head h1{font-size:clamp(2.15rem,4.5vw,3.65rem);line-height:1.07;letter-spacing:-.04em;max-width:930px;margin:.45rem 0 1rem}.page-head p{font-size:1.15rem;color:#4d5e71;max-width:830px}
.layout{display:grid;grid-template-columns:minmax(0,var(--article)) minmax(250px,320px);gap:3.2rem;align-items:start;padding-top:2.2rem;padding-bottom:4rem}.article{font-size:1.03rem}.article h2{font-size:1.7rem;line-height:1.22;margin-top:2.5rem;letter-spacing:-.018em}.article h3{font-size:1.23rem;margin-top:1.8rem}.article .lede{font-size:1.16rem;color:#3e5064}.article li{margin:.48rem 0}.article code{background:#f1f5f9;padding:.1rem .3rem;border-radius:.25rem}.sidebar{position:sticky;top:5.6rem}.sidebar-box{border:1px solid var(--line);border-radius:1rem;padding:1.1rem;margin-bottom:1rem}.sidebar-box h3{margin:.1rem 0 .65rem}.sidebar-box ul{list-style:none;margin:0;padding:0}.sidebar-box li{border-top:1px solid #edf1f5;padding:.6rem 0}.sidebar-box li:first-child{border-top:0}.sidebar-box a{text-decoration:none;font-weight:650}
.affiliate-box{margin:2.2rem 0;background:linear-gradient(145deg,#eef6ff,#f0fffb);border:1px solid #cfe0f7;border-radius:1rem;padding:1.35rem}.affiliate-box h3{font-size:1.35rem;margin:.25rem 0 .5rem}.micro,.source-note{font-size:.8rem;color:#637080}.fact-note{border-left:4px solid var(--brand);background:#f4f8ff;padding:1rem 1.1rem;margin:1.5rem 0;border-radius:0 .7rem .7rem 0}
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.proscons>div{background:var(--panel);padding:1rem 1.1rem;border-radius:.8rem}
.table-wrap{overflow-x:auto}.article table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.94rem}.article th,.article td{text-align:left;border:1px solid var(--line);padding:.75rem;vertical-align:top}.article th{background:#f3f7fa}
.related{margin-top:3rem;border-top:1px solid var(--line);padding-top:1.5rem}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}.related a{display:block;border:1px solid var(--line);border-radius:.7rem;padding:.8rem;text-decoration:none;font-weight:700}
.sources{margin-top:2.6rem;padding-top:1rem;border-top:1px solid var(--line)}.sources li{margin:.4rem 0}
.category-intro{max-width:800px}.list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.list-card{border:1px solid var(--line);padding:1rem 1.1rem;border-radius:.8rem}.list-card a{text-decoration:none;color:var(--ink)}.list-card p{margin:.35rem 0 0;color:var(--muted)}
.site-footer{background:#0d1828;color:#c9d5df;margin-top:3rem}.footer-inner{max-width:var(--max);margin:auto;padding:2.5rem 1.2rem;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:2rem}.site-footer h3,.site-footer strong{color:#fff}.site-footer a{color:#dbeafe}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:1rem 0;font-size:.85rem}
.notice{background:#fff8e7;border:1px solid #f2d88a;padding:1rem;border-radius:.7rem}
@media(max-width:900px){.nav{display:none;position:absolute;left:0;right:0;top:60px;background:#fff;border-bottom:1px solid var(--line);padding:1rem;flex-direction:column;align-items:stretch}.nav.open{display:flex}.menu-toggle{display:block}.header-cta{display:inline-flex;margin-left:0;padding:.62rem .78rem;font-size:.82rem}.hero-grid,.layout,.footer-inner{grid-template-columns:1fr}.sidebar{position:static;order:2}.grid{grid-template-columns:1fr 1fr}.hero{padding-top:3.4rem}.hero-card{max-width:600px}}
@media(max-width:620px){.grid,.list-grid,.proscons,.related-grid{grid-template-columns:1fr}.header-inner{padding:.68rem 1rem}.container{padding:0 1rem}.hero h1{font-size:2.65rem}.page-head h1{font-size:2.25rem}.article{font-size:1rem}.section{padding:2.7rem 0}}

@media(max-width:520px){
  .header-inner{gap:.45rem}
  .logo span{display:none}
  .logo-mark{width:32px;height:32px}
  .header-cta{display:inline-flex;padding:.58rem .66rem;font-size:.78rem;margin-left:auto}
  .menu-toggle{margin-left:0;padding:.5rem .58rem}
}