:root{
  --basin:#0d1b20; --basin-2:#122831; --panel:#16323c; --line:#25505d;
  --coral:#f2724b; --coral-hi:#ff8b67; --mint:#7fd1bd;
  --ink:#e7f0f1; --muted:#9db6bc; --white:#fff;
  --radius:8px; --wrap:1080px; --gutter:22px;
}
*{box-sizing:border-box}
html,body{width:100%;overflow-x:hidden;margin:0;padding:0}
body{
  background:var(--basin); color:var(--ink);
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  font-size:17px; line-height:1.68; -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 var(--gutter)}
a{color:var(--mint); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto}

/* progress bar */
#progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--coral);z-index:60}

/* header */
.topline{position:sticky;top:0;z-index:50;background:rgba(13,27,32,.94);
  backdrop-filter:blur(8px); border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;flex-wrap:nowrap;gap:14px;min-height:64px}
.wordmark{font-weight:800;font-size:1.16rem;letter-spacing:.1px;color:var(--white);white-space:nowrap}
.wordmark:hover{text-decoration:none;color:var(--coral-hi)}
.navwrap{display:flex;align-items:center;gap:16px;margin-left:auto;flex-wrap:nowrap}
.menu{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;flex-wrap:nowrap}
.menu a{display:block;padding:9px 9px;color:var(--ink);font-size:.9rem;font-weight:600;border-radius:6px;white-space:nowrap}
.menu a:hover{background:var(--basin-2);color:var(--mint);text-decoration:none}
.menu a[aria-current="page"]{color:var(--coral-hi)}
.btn{display:inline-block;background:var(--coral);color:#20100b;font-weight:800;
  padding:11px 18px;border-radius:var(--radius);white-space:nowrap;border:0;cursor:pointer;font-size:.95rem}
.btn:hover{background:var(--coral-hi);text-decoration:none;color:#20100b}
.btn-head{padding:9px 15px;font-size:.88rem}
.burger{display:none;margin-left:auto;background:transparent;border:1px solid var(--line);
  border-radius:6px;width:46px;height:44px;cursor:pointer;color:var(--ink);font-size:1.25rem;line-height:1}

/* breadcrumbs */
.crumbs{font-size:.83rem;color:var(--muted);padding:14px 0 0}
.crumbs a{color:var(--muted)}
.crumbs span{color:var(--ink)}

/* main */
main{display:block;padding:6px 0 46px}
h1{font-size:2.05rem;line-height:1.22;margin:18px 0 12px;font-weight:800;color:var(--white)}
h2{font-size:1.42rem;line-height:1.3;margin:38px 0 12px;font-weight:800;color:var(--white)}
h3{font-size:1.1rem;margin:24px 0 8px;font-weight:700;color:var(--mint)}
p{margin:0 0 15px}
main ul,main ol{margin:0 0 18px;padding-left:22px}
main li{margin:0 0 8px}
.lead{font-size:1.09rem;color:#cfe2e4;border-left:3px solid var(--coral);padding-left:16px;margin:0 0 22px}
figure{margin:0 0 26px}
figure img{display:block;width:90%;margin:0 auto;border-radius:var(--radius);box-shadow:0 8px 26px rgba(0,0,0,.35)}
figcaption{text-align:center;color:var(--muted);font-size:.85rem;margin-top:9px}

/* fact grid */
.factgrid{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.factgrid li{background:var(--basin-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px 14px;font-size:.93rem;margin:0}
.factgrid b{display:block;color:var(--coral-hi);font-size:.78rem;text-transform:uppercase;letter-spacing:.7px;margin-bottom:3px}

/* pros / cons */
.plusminus{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0 0 20px}
.plusminus>div{background:var(--basin-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.plusminus h3{margin-top:0}
.plusminus ul{margin:0;padding-left:18px}

/* tabs */
.switcher{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:0 0 22px;background:var(--basin-2)}
.swtabs{display:flex;flex-wrap:wrap;gap:0;background:var(--panel)}
.swtab{flex:1 1 auto;background:transparent;border:0;color:var(--muted);font-weight:700;font-size:.88rem;
  padding:12px 10px;cursor:pointer;min-height:44px;font-family:inherit}
.swtab[aria-selected="true"]{background:var(--basin-2);color:var(--coral-hi);box-shadow:inset 0 -3px 0 var(--coral)}
.swpanel{padding:16px 18px;font-size:.96rem}
.swpanel[hidden]{display:none}
.swpanel p:last-child{margin-bottom:0}

/* steps */
.steplist{counter-reset:s;list-style:none;padding:0}
.steplist li{position:relative;padding:0 0 0 44px;margin:0 0 14px}
.steplist li:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:1px;
  width:30px;height:30px;border-radius:50%;background:var(--coral);color:#20100b;
  font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.9rem}

/* calculator */
.calcbox{background:var(--basin-2);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:0 0 24px}
.calcbox label{display:block;font-size:.85rem;color:var(--muted);font-weight:700;margin:0 0 6px}
.calcrow{display:flex;gap:16px;flex-wrap:wrap}
.calcrow>div{flex:1 1 200px}
.calcbox input[type=range]{width:100%;accent-color:var(--coral)}
.calcout{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-size:1rem}
.calcout b{color:var(--mint);font-size:1.16rem}

/* tables */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 0 22px}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:.92rem}
th,td{border:1px solid var(--line);padding:9px 11px;text-align:left}
th{background:var(--panel);color:var(--white);font-weight:700}

/* faq */
.faqwrap details{border:1px solid var(--line);border-radius:var(--radius);background:var(--basin-2);margin:0 0 10px}
.faqwrap summary{cursor:pointer;padding:13px 16px;font-weight:700;min-height:44px;list-style:none;color:var(--white)}
.faqwrap summary::-webkit-details-marker{display:none}
.faqwrap summary:before{content:"+";color:var(--coral);font-weight:800;margin-right:9px}
.faqwrap details[open] summary:before{content:"\2212"}
.faqwrap .ans{padding:0 16px 14px;color:#cfe2e4;font-size:.96rem}

/* cta */
.ctarow{background:linear-gradient(135deg,var(--panel),var(--basin-2));border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;margin:28px 0;text-align:center}
.ctarow p{margin:0 0 14px;color:#cfe2e4}

/* footer */
.sitefoot{background:var(--basin-2);border-top:1px solid var(--line);padding:32px 0 20px;font-size:.9rem}
.footcols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footcols h4{margin:0 0 10px;font-size:.82rem;text-transform:uppercase;letter-spacing:.8px;color:var(--coral-hi)}
.footcols ul{list-style:none;margin:0;padding:0}
.footcols li{margin:0 0 6px}
.footcols a{color:var(--muted)}
.age{display:inline-block;border:2px solid var(--coral);color:var(--coral-hi);font-weight:800;
  border-radius:50%;width:38px;height:38px;line-height:34px;text-align:center;margin-bottom:8px}
.legal{margin-top:22px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.82rem}

/* back to top */
#toTop{position:fixed;right:16px;bottom:16px;z-index:55;width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:var(--panel);color:var(--ink);font-size:1.1rem;cursor:pointer;display:none}
#toTop.show{display:block}

@media (max-width:880px){
  body{font-size:16px}
  .burger{display:block}
  .navwrap{position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;
    gap:0;background:var(--basin-2);border-bottom:1px solid var(--line);padding:8px var(--gutter) 16px;margin-left:0}
  .navwrap.open{display:flex}
  .topline{position:relative}
  .menu{flex-direction:column;align-items:stretch;gap:0}
  .menu a{padding:12px 4px;min-height:44px;border-bottom:1px solid var(--line)}
  .btn-head{margin-top:12px;text-align:center}
  h1{font-size:1.5rem}
  h2{font-size:1.25rem}
  h3{font-size:1.08rem}
  .factgrid,.plusminus,.footcols{grid-template-columns:1fr}
  figure img{width:100%}
}