:root{
--bg:#f7f8fa;--paper:#fff;--ink:#0f1b2d;--ink2:#334155;--mute:#64748b;--line:#e3e8ef;
--acc:#0f766e;--acc-d:#0b5a54;--acc-l:#e6f4f2;--gold:#c2410c;--navy:#0b1628;
--r:16px;--sh:0 1px 2px rgba(15,27,45,.04),0 8px 24px -8px rgba(15,27,45,.10);--sh2:0 2px 4px rgba(15,27,45,.05),0 24px 48px -16px rgba(15,27,45,.18)}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink2);font:16.5px/1.7 Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:"Source Serif 4",Georgia,serif;color:var(--ink);line-height:1.15;margin:0 0 .5em;letter-spacing:-.015em}
h3{font-size:20px}a{color:var(--acc);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{color:var(--acc-d)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
::selection{background:#bfe6e1}

/* top note + header */
.topnote{background:var(--navy);color:#b9c3d3;font-size:12.5px;padding:9px 20px;text-align:center;letter-spacing:.01em}
.age{display:inline-block;background:var(--gold);color:#fff;font-weight:700;border-radius:999px;padding:1px 8px;margin-right:8px;font-size:11.5px}
.hd{background:rgba(255,255,255,.85);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.hd-in{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:20px;position:relative}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);font:700 22px "Source Serif 4",serif;letter-spacing:-.01em}
.logo small{font:500 11px Inter;color:var(--mute);text-transform:uppercase;letter-spacing:.12em;border-left:1px solid var(--line);padding-left:12px;margin-left:2px}
.mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,#14b8a6,#0f766e 55%,#0b4f4a);color:#fff;display:grid;place-items:center;font-size:19px;box-shadow:0 4px 12px -2px rgba(15,118,110,.45)}
.nav{display:flex;gap:2px}.nav a{text-decoration:none;color:var(--ink2);font-size:14.5px;font-weight:500;padding:9px 14px;border-radius:999px;transition:background .15s,color .15s}
.nav a:hover{background:#eef2f6;color:var(--ink)}.nav a[aria-current]{background:var(--ink);color:#fff}
.burger{display:none;border:1px solid var(--line);background:#fff;padding:9px 16px;border-radius:999px;font:500 14px Inter;color:var(--ink);cursor:pointer}

/* hero */
.hero{position:relative;overflow:hidden;padding:96px 0 88px;background:
radial-gradient(900px 420px at 85% -10%,rgba(20,184,166,.16),transparent 60%),
radial-gradient(700px 400px at -10% 110%,rgba(194,65,12,.08),transparent 60%),linear-gradient(#fff,var(--bg))}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse at 70% 30%,#000 10%,transparent 65%);-webkit-mask-image:radial-gradient(ellipse at 70% 30%,#000 10%,transparent 65%);opacity:.55}
.hero-in{position:relative;display:grid;grid-template-columns:1.45fr 1fr;gap:64px;align-items:center}
.hero h1{font-size:clamp(38px,5.4vw,64px);letter-spacing:-.025em}
.kicker,.eyebrow{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:.14em;font-size:11.5px;font-weight:700;color:var(--acc);margin:0 0 16px}
.kicker:before,.eyebrow:before{content:"";width:18px;height:2px;background:currentColor;border-radius:2px}
.lead{font-size:19px;color:var(--mute);max-width:620px;line-height:1.65}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--acc);color:#fff;border:0;padding:14px 24px;border-radius:999px;text-decoration:none;font:600 15px Inter;cursor:pointer;box-shadow:0 6px 18px -6px rgba(15,118,110,.6);transition:transform .15s,background .15s,box-shadow .15s}
.btn:hover{background:var(--acc-d);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px -8px rgba(15,118,110,.7)}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line),var(--sh)}.btn.ghost:hover{color:var(--acc)}
.hero-card{background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--sh2)}
.hero-card h2{font-size:24px}.hero-card p{margin:0 0 12px}.hero-card b{color:var(--ink)}
.live{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--acc);background:var(--acc-l);padding:5px 12px;border-radius:999px;margin-bottom:14px!important}
.live i{width:7px;height:7px;border-radius:50%;background:#14b8a6;box-shadow:0 0 0 4px rgba(20,184,166,.2);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(20,184,166,0)}}
.small{font-size:13.5px;color:var(--mute)}

/* trust strip */
.trust{background:var(--navy);color:#cbd5e1}.trust-in{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-in div{padding:28px 24px;border-left:1px solid rgba(255,255,255,.08)}.trust-in div:first-child{border-left:0}
.trust b{display:block;font:700 34px "Source Serif 4",serif;color:#fff;letter-spacing:-.02em}.trust span{font-size:14px}

/* sections */
.sec{padding:88px 0}.sec.alt{background:#fff;border-block:1px solid var(--line)}.sh{font-size:clamp(28px,3.4vw,38px);margin-bottom:36px}
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tile{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 26px;text-decoration:none;color:var(--ink2);box-shadow:var(--sh);transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;flex-direction:column;overflow:hidden}
.tile:after{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--c);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.tile:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:transparent}.tile:hover:after{transform:scaleX(1)}
.ico{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:color-mix(in srgb,var(--c) 12%,#fff);color:var(--c);margin-bottom:20px}.ico svg{width:24px;height:24px}
.tile span{position:absolute;top:26px;right:26px;font:600 13px Inter;color:#cbd5e1}.tile h3{margin-bottom:8px}.tile p{color:var(--mute);font-size:15px;margin:0 0 18px;flex:1}
.tile em{font-style:normal;font-weight:600;font-size:14px;color:var(--c)}
.t1{--c:#0f766e}.t2{--c:#c2410c}.t3{--c:#4f46e5}.t4{--c:#b45309}
.guides{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.guides article{background:var(--bg);border-radius:var(--r);padding:30px;border:1px solid var(--line);position:relative}
.guides article:before{content:"";display:block;width:36px;height:3px;border-radius:3px;background:var(--acc);margin-bottom:20px}
.guides p{color:var(--mute);font-size:15.5px}.guides a{font-weight:600;font-size:14.5px;text-decoration:none}
.latest{list-style:none;padding:0;margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.latest li{display:flex;align-items:center;gap:24px;padding:20px 28px;border-bottom:1px solid var(--line);transition:background .15s}.latest li:last-child{border-bottom:0}.latest li:hover{background:#fafbfc}
.latest a{font:600 18px "Source Serif 4",serif;color:var(--ink);text-decoration:none;flex:1}.latest a:after{content:"→";float:right;color:var(--mute);transition:transform .15s}.latest li:hover a:after{transform:translateX(4px);color:var(--acc)}
.tag{min-width:96px;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--acc);font-weight:700;background:var(--acc-l);padding:4px 10px;border-radius:999px;text-align:center}

/* inner pages */
.phero{position:relative;overflow:hidden;padding:72px 0 56px;background:radial-gradient(700px 300px at 90% 0,rgba(20,184,166,.13),transparent 60%),linear-gradient(#fff,#f3f6f9);border-bottom:1px solid var(--line)}
.phero h1{font-size:clamp(34px,4.6vw,54px);letter-spacing:-.025em;max-width:860px}.phero .lead{margin:0}
.crumbs{font-size:13.5px;color:var(--mute);margin-bottom:22px}.crumbs a{color:var(--mute);text-decoration:none}.crumbs a:hover{color:var(--acc)}.crumbs span{color:var(--ink2)}
.meta{display:inline-flex;gap:8px;align-items:center;font-size:12.5px;color:var(--mute);margin:22px 0 0;background:#fff;border:1px solid var(--line);padding:6px 14px;border-radius:999px}
.layout{display:grid;grid-template-columns:220px 1fr;gap:56px;padding-top:56px;padding-bottom:72px}
.toc{position:sticky;top:100px;align-self:start;display:flex;flex-direction:column;gap:4px;font-size:14px}.toc b{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--mute);margin-bottom:8px}
.toc a{text-decoration:none;color:var(--ink2);border-left:2px solid var(--line);padding:4px 0 4px 14px}.toc a:hover{color:var(--acc);border-color:var(--acc)}
.prose{max-width:760px}.narrow{padding-top:56px;padding-bottom:80px}
.prose h2{font-size:30px;margin-top:52px;scroll-margin-top:100px}.prose h2:first-child{margin-top:0}.prose p,.prose li{font-size:17px}.prose li{margin:6px 0}
.prose b{color:var(--ink)}
.check{list-style:none;padding:0}.check li{padding-left:34px;position:relative;margin:12px 0}
.check li:before{content:"";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--acc-l) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f766e' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center/12px no-repeat}
.steps{counter-reset:s;list-style:none;padding:0}.steps li{counter-increment:s;position:relative;padding:0 0 0 52px;margin:18px 0}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:10px;background:var(--ink);color:#fff;font:700 15px Inter;display:grid;place-items:center}
.note{background:linear-gradient(90deg,var(--acc-l),#f3faf9);border-left:3px solid var(--acc);padding:16px 20px;border-radius:0 12px 12px 0;font-size:15.5px!important;color:var(--ink2)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:20px 0}.cards div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--sh)}.cards h3{font-size:18px}.cards p{margin:0;font-size:15px!important;color:var(--mute)}

/* self-test */
.test{background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--sh);margin:24px 0}
.test fieldset{border:0;border-bottom:1px solid var(--line);margin:0 0 22px;padding:0 0 22px}.test fieldset:last-of-type{border-bottom:0}
.test legend{font-weight:600;color:var(--ink);margin-bottom:12px;font-size:16.5px}
.test label{display:inline-flex;align-items:center;gap:8px;margin:4px 8px 4px 0;font-size:14.5px;cursor:pointer;border:1px solid var(--line);border-radius:999px;padding:8px 16px;transition:all .15s}
.test label:hover{border-color:var(--acc)}.test input{accent-color:var(--acc);margin:0}.test label:has(input:checked){background:var(--acc-l);border-color:var(--acc);color:var(--acc-d);font-weight:600}
.result{margin-top:20px;padding:28px;border-radius:20px;border:1px solid var(--line);border-top:5px solid var(--c);background:#fff;box-shadow:var(--sh2)}

/* help */
.urgent{display:flex;gap:14px;align-items:flex-start;background:#fff7ed;border:1px solid #fed7aa;color:#7c2d12;border-radius:14px;padding:18px 22px;margin:40px 0 28px}
.urgent:before{content:"!";flex:none;width:26px;height:26px;border-radius:50%;background:var(--gold);color:#fff;font-weight:700;display:grid;place-items:center}
.urgent b{color:#7c2d12}
.helpgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.hcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s}
.hcard:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.geo{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--gold);font-weight:700;margin:0 0 10px}.hcard h3{font-size:19px}
.num{font:700 24px "Source Serif 4",serif;color:var(--acc);margin:0 0 6px;letter-spacing:-.01em}.hcard p{font-size:15px;color:var(--mute)}.hcard a{font-weight:600;font-size:14px}

/* calculator, lists, tables */
.calc{background:linear-gradient(135deg,var(--navy),#14304a);color:#cbd5e1;border-radius:20px;padding:30px;margin:28px 0;box-shadow:var(--sh2)}.calc h3{color:#fff}
.calc-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.calc label{font-size:13px;color:#94a3b8}
.calc input{display:block;width:100%;margin-top:6px;padding:12px 14px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);color:#fff;border-radius:10px;font:600 16px Inter}
.calc input:focus{outline:2px solid #14b8a6;outline-offset:1px}.c-out{font:600 22px "Source Serif 4",serif;color:#5eead4;margin:20px 0 6px}.calc .small{color:#94a3b8}
.myths dt,.gloss dt{font:600 19px "Source Serif 4",serif;color:var(--ink);margin-top:24px}.myths dd,.gloss dd{margin:6px 0 0;color:var(--mute)}
.myths dt{display:flex;gap:10px;align-items:center}.myths dt:before{content:"✕";flex:none;width:24px;height:24px;border-radius:50%;background:#fff1eb;color:var(--gold);font:700 12px Inter;display:grid;place-items:center}
.gloss{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:8px 28px 28px;box-shadow:var(--sh)}.gloss dt{padding-top:20px;border-top:1px solid var(--line)}.gloss dt:first-child{border-top:0}
.tbl{width:100%;border-collapse:separate;border-spacing:0;font-size:15px;margin:16px 0;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}.tbl tr:last-child td{border-bottom:0}.tbl th{background:#f1f5f9;color:var(--ink);font-size:13px;text-transform:uppercase;letter-spacing:.06em}
.tbl td:not(:first-child){color:var(--acc);font-weight:600}
.sgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scard{background:var(--bg);border:1px solid var(--line);border-radius:var(--r);padding:24px;text-decoration:none;color:var(--ink2);display:flex;flex-direction:column;transition:all .2s}
.scard:hover{background:#fff;border-color:var(--acc);box-shadow:var(--sh2);transform:translateY(-3px)}.scard h3{font-size:19px}.scard p{color:var(--mute);font-size:15px;flex:1}.scard span{color:var(--acc);font-weight:600;font-size:14px}
.helpgrid.two{grid-template-columns:1fr 1fr;margin-bottom:16px}

/* footer */
.ft{background:var(--navy);color:#94a3b8;padding:64px 0 28px;font-size:14.5px}
.ft a{color:#cbd5e1;display:block;margin:6px 0;text-decoration:none}.ft a:hover{color:#5eead4}
.ft-disc{display:flex;gap:14px;align-items:center;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:18px 22px;margin-bottom:48px;color:#cbd5e1}
.ft-disc:before{content:"18+";flex:none;background:var(--gold);color:#fff;font:700 12px Inter;border-radius:999px;padding:4px 10px}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px}.ft b{color:#fff;display:block;margin-bottom:10px;font-size:13px;text-transform:uppercase;letter-spacing:.1em}
.ft-grid p{max-width:400px}.copy{border-top:1px solid rgba(255,255,255,.08);margin-top:48px;padding-top:22px;font-size:13px}.copy a{display:inline;color:#5eead4}

a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
@media(max-width:980px){.hero-in,.layout,.ft-grid{grid-template-columns:1fr}.hero-in{gap:40px}.tiles{grid-template-columns:1fr 1fr}.guides,.helpgrid,.cards,.calc-row,.sgrid,.helpgrid.two{grid-template-columns:1fr}
.trust-in{grid-template-columns:1fr 1fr}.trust-in div:nth-child(3){border-left:0}.trust-in div:nth-child(n+3){border-top:1px solid rgba(255,255,255,.08)}
.toc{position:static;flex-direction:row;flex-wrap:wrap}.burger{display:block}
.nav{display:none;position:absolute;left:-24px;right:-24px;top:100%;background:#fff;flex-direction:column;padding:12px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--sh2)}.nav.open{display:flex}.nav a{border-radius:10px}}
@media(max-width:560px){.wrap{padding:0 16px}.nav{left:-16px;right:-16px}.tiles{grid-template-columns:1fr}.logo small{display:none}.hero{padding:64px 0}
.latest li{flex-direction:column;align-items:flex-start;gap:8px;padding:18px 20px}.sec{padding:64px 0}.test{padding:22px}.trust b{font-size:28px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.wrap.prose{max-width:1180px}.wrap.prose>*{max-width:760px}.wrap.prose>.helpgrid,.wrap.prose>.calc,.wrap.prose>.cards{max-width:860px}