:root{--ink:#12233a;--muted:#47617d;--accent:#0a6cff;--accent2:#00a98f;--glass:rgba(255,255,255,.68);--glass2:rgba(255,255,255,.52);--border:rgba(255,255,255,.75);--shadow:0 12px 40px rgba(18,50,90,.14);--radius:22px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.65;background:linear-gradient(160deg,#dbeeff 0%,#eef7ff 32%,#e6fff7 68%,#fff4e0 100%);background-attachment:fixed;min-height:100vh}
body::before,body::after{content:"";position:fixed;border-radius:50%;filter:blur(70px);z-index:-1;opacity:.55}
body::before{width:480px;height:480px;background:#8ec9ff;top:-140px;right:-120px}
body::after{width:420px;height:420px;background:#9ff0d2;bottom:-160px;left:-120px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 18px}
header.site{position:sticky;top:10px;z-index:50;margin:10px auto 0;max-width:1060px;padding:0 18px}
.nav{display:flex;align-items:center;flex-wrap:wrap;gap:12px;background:var(--glass);backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5);border:1px solid var(--border);border-radius:999px;padding:8px 10px 8px 12px;box-shadow:var(--shadow)}
.logo{display:flex;align-items:center;gap:11px;color:var(--ink)}
.logo .mark{width:40px;height:40px;flex:none;border-radius:12px;box-shadow:0 6px 16px rgba(10,108,255,.35);transition:transform .25s ease}
.logo:hover .mark{transform:translateY(-1px) scale(1.03)}
.logo .word{font-weight:800;font-size:1.3rem;letter-spacing:-.03em;line-height:1;color:var(--ink)}
.logo .word span{background:linear-gradient(120deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav nav{display:flex;gap:4px;flex-wrap:wrap;font-size:.93rem;align-items:center;margin-left:auto}
.nav nav a{color:var(--ink);font-weight:600;padding:8px 13px;border-radius:999px;transition:background .2s ease,color .2s ease}
.nav nav a:hover{background:rgba(255,255,255,.75);color:var(--accent)}
.nav a.cta{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:700;font-size:.93rem;padding:9px 16px;border-radius:999px;box-shadow:0 6px 16px rgba(10,108,255,.3);margin-left:6px;white-space:nowrap}
.nav a.cta:hover{color:#fff;filter:brightness(1.07);text-decoration:none}
a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion:reduce){.logo .mark,.nav nav a{transition:none}}
.hero{padding:52px 0 18px;text-align:center}
.hero h1{font-size:clamp(2rem,6vw,3.4rem);line-height:1.08;letter-spacing:-.03em;margin:0 0 14px}
.hero p.lede{font-size:1.15rem;color:var(--muted);max-width:720px;margin:0 auto 24px}
.card{background:var(--glass);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin:20px 0}
.card.flat{background:var(--glass2)}
h1.page{font-size:clamp(1.8rem,5vw,2.6rem);letter-spacing:-.02em;line-height:1.15;margin:26px 0 10px}
h2{font-size:1.45rem;letter-spacing:-.01em;margin:30px 0 10px}
h3{font-size:1.12rem;margin:20px 0 6px}
p,li{font-size:1.02rem}
.meta{color:var(--muted);font-size:.95rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin:18px 0}
.tile{display:block;background:var(--glass);border:1px solid var(--border);border-radius:18px;padding:18px;box-shadow:var(--shadow);color:var(--ink)}
.tile:hover{text-decoration:none;transform:translateY(-2px)}
.tile b{display:block;font-size:1.05rem;margin-bottom:4px}
.tile span{color:var(--muted);font-size:.93rem}
.chip{display:inline-block;background:rgba(10,108,255,.12);color:#075ec4;border-radius:999px;padding:2px 10px;font-size:.82rem;font-weight:700;margin-bottom:8px}
.decoder{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:14px 0}
label{font-weight:700;font-size:.92rem;display:block;margin-bottom:5px}
select,input{width:100%;padding:12px 14px;border-radius:14px;border:1px solid rgba(18,35,58,.18);background:rgba(255,255,255,.9);font-size:1rem;color:var(--ink)}
button.btn{width:100%;padding:13px 18px;border:0;border-radius:14px;background:linear-gradient(135deg,var(--accent),#00a98f);color:#fff;font-size:1.02rem;font-weight:800;cursor:pointer;box-shadow:0 8px 22px rgba(10,108,255,.3)}
button.btn:active{transform:scale(.99)}
.result{margin-top:14px;padding:16px;border-radius:14px;background:rgba(0,169,143,.12);border:1px solid rgba(0,169,143,.35);display:none}
.result.show{display:block}
.calc-out{margin-top:14px;padding:16px;border-radius:14px;background:rgba(10,108,255,.09);border:1px solid rgba(10,108,255,.28);font-size:1.05rem}
table{width:100%;border-collapse:collapse;margin:14px 0;background:rgba(255,255,255,.55);border-radius:14px;overflow:hidden}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(18,35,58,.09);font-size:.97rem}
th{background:rgba(10,108,255,.1)}
ol.steps li,ul.checks li{margin-bottom:9px}
.callout{border-left:5px solid #e8890c;background:rgba(232,137,12,.12);padding:14px 18px;border-radius:0 14px 14px 0;margin:18px 0}
.danger{border-left-color:#d92d20;background:rgba(217,45,32,.09)}
.safe{border-left-color:var(--accent2);background:rgba(0,169,143,.1)}
.crumbs{font-size:.9rem;color:var(--muted);margin:20px 0 0}
.crumbs a{color:var(--muted)}
.faq h3{margin-top:16px}
footer.site{margin:46px 0 26px;text-align:center;color:var(--muted);font-size:.92rem}
footer.site a{color:var(--muted);font-weight:600}
.small{font-size:.9rem;color:var(--muted)}
@media (max-width:760px){header.site{top:0;margin:0;padding:0;max-width:none}html{scroll-padding-top:132px}.nav{border-radius:0 0 22px 22px;border-top:0;border-left:0;border-right:0;padding:10px 14px 8px;row-gap:8px;background:rgba(255,255,255,.85)}.logo{order:1}.logo .mark{width:34px;height:34px}.logo .word{font-size:1.14rem}.nav a.cta{order:2;margin-left:auto;padding:9px 15px;font-size:.9rem}.nav nav{order:3;flex:1 0 100%;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px;margin-left:0}.nav nav::-webkit-scrollbar{display:none}.nav nav a{white-space:nowrap;padding:7px 11px;background:rgba(255,255,255,.55);font-size:.9rem}.card{padding:18px}}