:root{--navy:#0a1f3c;--navy2:#0d2a4e;--ink:#12283f;--muted:#5b7189;--ice:#0a9be0;--ice2:#1fb6ff;--iceDeep:#0673c4;--frost:#eef6fc;--frost2:#f6fafd;--line:#dbe7f1;--cta1:#ff9a1f;--cta2:#f2670a;--good:#12a150;--bad:#e5484d;}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji",sans-serif;
color:var(--ink);background:var(--frost2);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--iceDeep);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.22;color:var(--navy);font-weight:800;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(1.7rem,4.4vw,2.6rem)}
h2{font-size:clamp(1.35rem,3vw,1.9rem);margin-top:1.9em}
h3{font-size:1.18rem;margin-top:1.5em}
p{margin:0 0 1.05em}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.prose{max-width:820px}
.lead{font-size:1.16rem;color:#26425f;font-weight:500}
.muted{color:var(--muted)}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:10px 14px;z-index:200;border-radius:8px}
.skip:focus{left:12px;top:12px}

/* ---- header ---- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,31,60,.98);
backdrop-filter:saturate(1.3) blur(6px);border-bottom:1px solid rgba(255,255,255,.08)}
.hd{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.06rem;letter-spacing:-.02em;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand .mk{width:34px;height:34px;flex:0 0 34px}
.brand .bt small{display:block;font-size:.62rem;font-weight:600;color:var(--ice2);letter-spacing:.14em;text-transform:uppercase;line-height:1}
.nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.nav a{color:#cfe1f2;font-size:.93rem;font-weight:600;padding:8px 11px;border-radius:8px}
.nav a:hover{color:#fff;background:rgba(255,255,255,.08);text-decoration:none}
.nav a[aria-current="page"]{color:#fff;background:rgba(31,182,255,.18)}
.hd-cta{margin-left:8px}
.navtog,.burger{display:none}
@media(max-width:900px){
 .nav{position:fixed;inset:64px 0 auto 0;background:var(--navy);flex-direction:column;
 align-items:stretch;gap:0;padding:8px 14px 18px;transform:translateY(-140%);
 transition:transform .28s ease;box-shadow:0 18px 30px rgba(0,0,0,.35);max-height:calc(100vh - 64px);overflow:auto}
 .nav a{padding:13px 10px;border-bottom:1px solid rgba(255,255,255,.07)}
 .navtog:checked~.nav{transform:translateY(0)}
 .burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
 margin-left:auto;width:44px;height:44px;padding:10px;border-radius:9px;cursor:pointer}
 .burger span{height:2px;background:#fff;border-radius:2px;transition:.25s}
 .navtog:checked~.burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
 .navtog:checked~.burger span:nth-child(2){opacity:0}
 .navtog:checked~.burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
 .hd-cta{display:none}
}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
font-weight:800;font-size:1.02rem;line-height:1.1;padding:15px 24px;border-radius:12px;
min-height:52px;cursor:pointer;text-align:center;transition:transform .12s ease,box-shadow .2s ease;border:0}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--cta1),var(--cta2));color:#fff;
box-shadow:0 10px 22px -8px rgba(242,103,10,.7)}
.btn-primary:hover{box-shadow:0 14px 26px -8px rgba(242,103,10,.85)}
.btn-primary .cta-arrow{transition:transform .2s}
.btn-primary:hover .cta-arrow{transform:translateX(4px)}
.cta-sub{display:block;font-size:.72rem;font-weight:600;opacity:.92;margin-top:2px}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-outline{background:#fff;color:var(--iceDeep);border:1.5px solid var(--line)}
.btn-outline:hover{border-color:var(--ice)}
.btn-hd{background:linear-gradient(135deg,var(--cta1),var(--cta2));color:#fff;padding:10px 16px;
min-height:0;font-size:.92rem;border-radius:9px}
.btn-block{display:flex;width:100%}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}
.cta-row .btn{flex:1 1 auto;min-width:220px}

/* ---- hero ---- */
.hero{background:radial-gradient(1200px 500px at 78% -10%,#0f3a63 0,var(--navy) 55%);color:#eaf3fb;position:relative;overflow:hidden}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center;padding:44px 0 40px}
.hero h1{color:#fff}
.hero p{color:#c8dcef}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(31,182,255,.16);
color:#bfe6ff;font-weight:700;font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;
padding:6px 12px;border-radius:100px;margin-bottom:14px}
.hero-art{filter:drop-shadow(0 20px 40px rgba(0,0,0,.4))}
.trust-line{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:16px;font-size:.86rem;color:#a9c6e2}
.trust-line b{color:#fff}
@media(max-width:820px){.hero-grid{grid-template-columns:1fr;gap:8px;padding:30px 0 26px}
 .hero-art{max-width:320px;margin:6px auto 0}}

/* ---- layout blocks ---- */
main{display:block}
.section{padding:6px 0}
.pagehead{padding:26px 0 6px}
.breadcrumbs{font-size:.82rem;color:var(--muted);padding:12px 0 0}
.breadcrumbs a{color:var(--iceDeep)}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumbs li::after{content:"/";margin-left:6px;color:#b9c8d8}
.breadcrumbs li:last-child::after{content:""}
.content{padding:10px 0 40px}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;font-size:.86rem;
color:var(--muted);border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 16px;margin:6px 0 22px}
.byline .av{width:36px;height:36px;border-radius:50%;flex:0 0 36px}
.byline a{font-weight:700;color:var(--navy)}
.byline .dot{color:#c3d2e0}

/* ---- tables ---- */
.table-wrap{overflow-x:auto;margin:6px 0 20px;border:1px solid var(--line);border-radius:14px;background:#fff}
table{border-collapse:collapse;width:100%;font-size:.95rem}
caption{caption-side:top;text-align:left;font-weight:700;color:var(--navy);padding:12px 14px 0}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--frost);color:var(--navy);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:var(--frost2)}
@media(max-width:640px){
 table,thead,tbody,th,td,tr{display:block}
 thead{position:absolute;left:-9999px}
 tbody tr{border-bottom:2px solid var(--line);padding:6px 0}
 tbody tr:last-child{border-bottom:0}
 td{border:0;padding:7px 14px;display:flex;justify-content:space-between;gap:14px}
 td::before{content:attr(data-th);font-weight:700;color:var(--navy);flex:0 0 45%;font-size:.82rem}
}

/* ---- callouts ---- */
.callout{display:flex;gap:12px;border:1px solid var(--line);border-left-width:5px;
border-radius:12px;padding:14px 16px;margin:18px 0;background:#fff}
.call-ico{font-size:1.15rem;line-height:1.4}
.call-body>*:last-child{margin-bottom:0}
.call-title{font-weight:800;margin:0 0 4px;color:var(--navy)}
.call-info{border-left-color:var(--ice);background:#ecf6fd}
.call-tip{border-left-color:#7b61ff;background:#f1eeff}
.call-good{border-left-color:var(--good);background:#e9f8ef}
.call-warn{border-left-color:#e8930c;background:#fff6e7}
.call-danger{border-left-color:var(--bad);background:#fdecec}

/* ---- lists ---- */
ul.plain,ol.steps{padding-left:1.25em;margin:0 0 1.1em}
ul.plain li,ol.steps li{margin:.3em 0}
ol.steps{counter-reset:s;list-style:none;padding-left:0}
ol.steps>li{position:relative;padding:2px 0 2px 42px;margin:.5em 0}
ol.steps>li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;
width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--ice),var(--iceDeep));
color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.9rem}
ul.ticks,ul.crosses{list-style:none;padding-left:0;margin:0 0 1.1em}
ul.ticks li,ul.crosses li{position:relative;padding:4px 0 4px 30px;margin:.15em 0}
ul.ticks li::before{content:"✓";position:absolute;left:0;top:3px;color:var(--good);font-weight:800}
ul.crosses li::before{content:"✕";position:absolute;left:0;top:3px;color:var(--bad);font-weight:800}

/* ---- stats ---- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:8px 0 22px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}
.stat-v{display:block;font-size:1.5rem;font-weight:800;color:var(--navy);letter-spacing:-.02em}
.stat-l{display:block;font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-top:3px}
@media(max-width:680px){.stat-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- reviews ---- */
.review{margin:14px 0;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:14px}
.review blockquote{margin:0 0 8px;font-style:italic;color:#31465c}
.review figcaption{display:flex;align-items:center;gap:10px}
.stars{color:#f5a623;letter-spacing:2px}
.score{font-weight:700;color:var(--navy);font-size:.9rem}

/* ---- cta block ---- */
.cta-block{margin:26px 0;border-radius:18px;background:linear-gradient(135deg,#0f3a63,var(--navy));
color:#eaf3fb;padding:2px;box-shadow:0 18px 40px -20px rgba(10,31,60,.7)}
.cta-block-inner{padding:24px 24px 20px;border-radius:16px;background:
radial-gradient(600px 200px at 90% 0,rgba(31,182,255,.16),transparent)}
.cta-block h3{color:#fff;margin-top:0}
.cta-block p{color:#c8dcef}
.cta-fine{font-size:.76rem;color:#9db9d6;margin:6px 0 0}

/* ---- author card ---- */
.author-card{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
border-radius:16px;padding:18px;margin:22px 0}
.author-card .av{width:64px;height:64px;border-radius:50%;flex:0 0 64px}
.author-card h3{margin:0 0 2px}
.author-card .role{color:var(--iceDeep);font-weight:700;font-size:.9rem;margin:0 0 6px}

/* ---- FAQ ---- */
.faq{margin:10px 0 8px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;overflow:hidden}
.faq summary{cursor:pointer;padding:15px 46px 15px 16px;font-weight:700;color:var(--navy);position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);
font-size:1.3rem;color:var(--ice);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .fa{padding:0 16px 16px}
.faq .fa>*:last-child{margin-bottom:0}

/* ---- toc ---- */
.toc{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin:0 0 22px}
.toc p{font-weight:800;color:var(--navy);margin:0 0 8px;font-size:.9rem;text-transform:uppercase;letter-spacing:.04em}
.toc ul{columns:2;column-gap:26px;margin:0;padding-left:1.1em;font-size:.94rem}
@media(max-width:600px){.toc ul{columns:1}}

/* ---- disclaimer strip ---- */
.age-strip{background:#081627;color:#9db9d6;font-size:.82rem;text-align:center;padding:9px 16px}
.age-strip b{color:#fff}
.age-badge{display:inline-flex;align-items:center;justify-content:center;background:var(--bad);
color:#fff;font-weight:800;border-radius:6px;padding:1px 7px;margin-right:6px;font-size:.8rem}

/* ---- related ---- */
.related{margin:26px 0 0}
.related h2{margin-top:0}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.rel-grid a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;color:var(--navy);font-weight:700}
.rel-grid a:hover{border-color:var(--ice);text-decoration:none;box-shadow:0 8px 18px -12px rgba(10,31,60,.4)}
.rel-grid a span{display:block;font-weight:500;font-size:.85rem;color:var(--muted);margin-top:3px}
@media(max-width:720px){.rel-grid{grid-template-columns:1fr}}

/* ---- footer ---- */
.site-footer{background:var(--navy);color:#b8cde2;margin-top:34px}
.foot-top{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:26px;padding:40px 0 26px}
.foot-brand .brand{margin-bottom:10px}
.foot-brand p{font-size:.88rem;color:#95b2cf;max-width:34ch}
.foot-col h4{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 10px}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin:6px 0}
.foot-col a{color:#b8cde2;font-size:.9rem}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0 30px;font-size:.8rem;color:#89a6c4}
.foot-bottom p{margin:.4em 0}
.pay-badges{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.pay-badges span{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
border-radius:7px;padding:4px 10px;font-size:.78rem;color:#cfe0f0;font-weight:600}
@media(max-width:860px){.foot-top{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-top{grid-template-columns:1fr}}

/* ---- sticky mobile cta ---- */
.mcta{position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;gap:10px;padding:10px 14px
calc(10px + env(safe-area-inset-bottom));background:rgba(10,31,60,.97);border-top:1px solid rgba(255,255,255,.12);
box-shadow:0 -8px 24px rgba(0,0,0,.28)}
.mcta .btn{flex:1}
.mcta .btn-primary{padding:13px 18px;min-height:48px}
@media(max-width:900px){.mcta{display:flex}body{padding-bottom:76px}}

/* misc */
.glossary{margin:0 0 8px}
.glossary dt{font-weight:800;color:var(--navy);margin-top:16px;font-size:1.05rem}
.glossary dd{margin:3px 0 0;color:#31465c}
hr{border:0;border-top:1px solid var(--line);margin:26px 0}
.note-small{font-size:.82rem;color:var(--muted)}
figure{margin:0}
.center{text-align:center}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}