/* Layout: light, centered-hero AI-lab style; big tight sans, pill buttons, soft gradient glow, bordered cards */
:root{
  --bg:#FFFFFF; --soft:#F5F6F8; --ink:#0B0B0F; --muted:#62666F; --line:#E7E8EC;
  --accent:#3B5BFF; --accent-ink:#FFFFFF; --glow1:#C9D3FF; --glow2:#D9F2EA;
  --dark:#0B0B0F; --dark-fg:#F4F5F7; --dark-muted:#9DA1AB; --dark-line:#24252C; --dark-card:#15161B;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0B0B0F; --soft:#131419; --ink:#F2F3F6; --muted:#9DA1AB; --line:#24252C;
  --accent:#6A84FF; --accent-ink:#FFFFFF; --glow1:#1C2559; --glow2:#0F2D24;
  --dark:#15161B; --dark-fg:#F4F5F7; --dark-muted:#9DA1AB; --dark-line:#2A2B33; --dark-card:#1C1D23;
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0B0B0F; --soft:#131419; --ink:#F2F3F6; --muted:#9DA1AB; --line:#24252C;
  --accent:#6A84FF; --accent-ink:#FFFFFF; --glow1:#1C2559; --glow2:#0F2D24;
  --dark:#15161B; --dark-fg:#F4F5F7; --dark-muted:#9DA1AB; --dark-line:#2A2B33; --dark-card:#1C1D23;
  color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
h1,h2,h3{margin:0;font-weight:500;letter-spacing:-0.035em;line-height:1.06;text-wrap:balance}
p{margin:0}
.wrap{max-width:1160px;margin:0 auto;padding-inline:20px}
.center{text-align:center}
.lead{color:var(--muted);font-size:18px;max-width:56ch}
.center .lead{margin-inline:auto}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:500;font-size:15px;text-decoration:none;border:1px solid transparent;transition:opacity .15s ease,transform .15s ease}
.btn:hover{opacity:.88;transform:translateY(-1px)}
a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.btn-ink{background:var(--ink);color:var(--bg)}
.btn-line{border-color:var(--line);background:var(--bg)}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--muted);background:var(--bg)}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--accent)}
section{padding-block:96px}
.head{display:flex;flex-direction:column;gap:16px;margin-bottom:48px}
.head h2{font-size:clamp(32px,4.6vw,52px)}
@media (max-width:700px){section{padding-block:64px}.head{margin-bottom:32px}}

/* nav */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.logo{display:flex;align-items:center;gap:9px;font-weight:600;font-size:18px;letter-spacing:-0.03em;text-decoration:none}
.logo svg{width:22px;height:22px}
.links{display:flex;gap:28px;font-size:14px;color:var(--muted)}
.links a{text-decoration:none}.links a:hover{color:var(--ink)}
.nav .btn{padding:9px 18px;font-size:14px}
@media (max-width:780px){.links{display:none}}

/* hero */
.hero{position:relative;overflow:hidden;padding-block:104px 88px}
.hero::before{content:"";position:absolute;left:50%;top:-180px;transform:translateX(-50%);width:1100px;max-width:160%;height:620px;background:radial-gradient(40% 50% at 35% 50%,var(--glow1),transparent 70%),radial-gradient(40% 50% at 68% 45%,var(--glow2),transparent 70%);filter:blur(10px);pointer-events:none;z-index:0}
.hero .wrap{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:26px}
.hero h1{font-size:clamp(44px,7vw,84px);max-width:14ch}
.hero .ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px}

/* intro split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split h2{font-size:clamp(30px,4vw,46px)}
.split .txt{display:flex;flex-direction:column;gap:18px;min-width:0}
.visual{border:1px solid var(--line);border-radius:22px;background:var(--soft);padding:22px;display:flex;flex-direction:column;gap:10px;min-width:0}
.file{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:14px}
.file span:nth-child(2){min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ft{font-family:var(--mono);font-size:10px;padding:3px 7px;border-radius:6px;background:var(--soft);color:var(--muted)}
.ok{font-family:var(--mono);font-size:11px;color:var(--accent)}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:32px}}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{border:1px solid var(--line);border-radius:20px;padding:28px;background:var(--bg);display:flex;flex-direction:column;gap:12px;min-width:0}
.card .ico{width:44px;height:44px;border-radius:12px;background:var(--soft);display:grid;place-items:center}
.card .ico svg{width:22px;height:22px;stroke:var(--ink)}
.card h3{font-size:20px;letter-spacing:-0.02em}
.card p{color:var(--muted);font-size:15px}
@media (max-width:860px){.cards{grid-template-columns:1fr}}
.cards.six{grid-template-columns:repeat(3,1fr)}
@media (max-width:860px){.cards.six{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.cards.six{grid-template-columns:1fr}}

/* privacy */
.privacy{background:var(--soft)}
.checks{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.checks div{background:var(--bg);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:10px;font-size:15px;min-width:0}
.checks svg{width:22px;height:22px;stroke:var(--accent)}
@media (max-width:860px){.checks{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.checks{grid-template-columns:1fr}}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.steps li{border:1px solid var(--line);border-radius:20px;padding:26px;display:flex;flex-direction:column;gap:10px;counter-increment:s;min-width:0}
.steps li::before{content:counter(s);width:32px;height:32px;border-radius:50%;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-family:var(--mono);font-size:13px}
.steps h3{font-size:19px;letter-spacing:-0.02em}
.steps p{color:var(--muted);font-size:15px}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

/* payouts */
.pay{background:var(--dark);color:var(--dark-fg);border-radius:28px;padding:72px 48px}
.pay .lead{color:var(--dark-muted)}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:48px}
.tier{background:var(--dark-card);border:1px solid var(--dark-line);border-radius:20px;padding:30px;display:flex;flex-direction:column;gap:10px;text-align:left}
.tier b{font-size:clamp(44px,5vw,60px);font-weight:500;letter-spacing:-0.05em;line-height:1;font-variant-numeric:tabular-nums}
.tier span{color:var(--dark-muted);font-size:15px}
.pay .btn{background:var(--dark-fg);color:#0B0B0F;margin-top:40px}
.fine{font-size:12px;color:var(--dark-muted);margin-top:18px}
@media (max-width:860px){.tiers{grid-template-columns:1fr}.pay{padding:48px 22px}}

/* press */
.press{border:1px solid var(--line);border-radius:22px;padding:36px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.press .src{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.press h3{font-size:clamp(22px,2.6vw,30px);max-width:30ch;margin-top:10px}

/* faq */
.faq{max-width:780px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:22px 0}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:500;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--muted);margin-top:10px}

/* final */
.final{position:relative;overflow:hidden;border-radius:28px;border:1px solid var(--line);padding:80px 24px;display:flex;flex-direction:column;align-items:center;gap:22px}
.final::before{content:"";position:absolute;inset:0;background:radial-gradient(50% 70% at 30% 100%,var(--glow1),transparent 70%),radial-gradient(50% 70% at 75% 100%,var(--glow2),transparent 70%);z-index:0}
.final>*{position:relative;z-index:1}
.final h2{font-size:clamp(34px,5vw,56px)}

/* survey */
.survey{max-width:760px;margin:0 auto;border:1px solid var(--line);border-radius:28px;background:var(--bg);box-shadow:0 30px 80px -40px color-mix(in srgb,var(--accent) 45%,transparent);overflow:hidden}
.s-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 28px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.s-top .count{font-family:var(--mono)}
.bar{height:3px;background:var(--line)}
.bar b{display:block;height:100%;width:0;background:var(--accent);transition:width .35s ease}
.s-body{padding:40px 28px 32px;min-height:340px;display:flex;flex-direction:column;gap:26px}
.s-q{font-size:clamp(24px,3.2vw,32px);font-weight:500;letter-spacing:-0.03em;line-height:1.15;text-wrap:balance}
.s-hint{color:var(--muted);font-size:14px;margin-top:-16px}
.s-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.s-opt{appearance:none;font:inherit;color:inherit;text-align:left;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--bg);cursor:pointer;font-size:15px;display:flex;justify-content:space-between;align-items:center;gap:10px;transition:border-color .12s ease,background .12s ease}
.s-opt:hover{border-color:var(--ink)}
.s-opt:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.s-opt[aria-pressed="true"]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--bg))}
.s-opt .tick{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--line);flex:none;display:grid;place-items:center;font-size:11px;color:var(--accent-ink)}
.s-opt[aria-pressed="true"] .tick{background:var(--accent);border-color:var(--accent)}
.s-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:auto}
.s-back{appearance:none;background:none;border:0;font:inherit;color:var(--muted);cursor:pointer;padding:8px 0}
.s-back:disabled{visibility:hidden}
.s-next{appearance:none;font:inherit;border:0;cursor:pointer}
.s-next:disabled{opacity:.35;cursor:not-allowed;transform:none}
.cheer{font-size:13px;color:var(--accent);min-height:20px;font-weight:500}
.result{display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px}
.r-label{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.r-num{font-size:clamp(60px,11vw,112px);font-weight:500;letter-spacing:-0.06em;line-height:1;font-variant-numeric:tabular-nums;background:linear-gradient(120deg,var(--ink),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.r-assets{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.r-assets span{font-size:13px;padding:6px 12px;border-radius:999px;background:var(--soft);border:1px solid var(--line)}
.r-fine{font-size:12px;color:var(--muted);max-width:52ch}
@media (max-width:560px){.s-opts{grid-template-columns:1fr}.s-body{padding:28px 18px 24px}.s-top{padding:16px 18px}}

footer{border-top:1px solid var(--line);padding-block:40px 56px;color:var(--muted);font-size:13px}
footer .wrap{display:grid;grid-template-columns:1fr 2fr;gap:32px}
footer p+p{margin-top:10px}
@media (max-width:720px){footer .wrap{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---- article / content pages ---- */
.crumbs{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;padding-top:28px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ink)}
.page-hero{position:relative;overflow:hidden;padding-block:40px 48px;border-bottom:1px solid var(--line)}
.page-hero::before{content:"";position:absolute;right:-200px;top:-260px;width:760px;height:560px;max-width:140%;background:radial-gradient(40% 50% at 40% 50%,var(--glow1),transparent 70%),radial-gradient(40% 50% at 70% 45%,var(--glow2),transparent 70%);pointer-events:none;z-index:0}
.page-hero .wrap{position:relative;z-index:1}
.page-hero h1{font-size:clamp(36px,5.4vw,60px);max-width:20ch;margin-top:18px}
.page-hero .lead{margin-top:18px}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:22px;font-size:13px;color:var(--muted);font-family:var(--mono)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:64px;padding-block:56px 40px}
@media (max-width:960px){.article-grid{grid-template-columns:1fr;gap:32px}}
.prose{max-width:70ch;font-size:17px;line-height:1.75;min-width:0}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(26px,3vw,34px);margin-top:2.2em;scroll-margin-top:90px}
.prose h3{font-size:21px;margin-top:1.8em;letter-spacing:-0.02em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li+li{margin-top:.45em}
.prose a{color:var(--accent);text-underline-offset:3px}
.prose strong{font-weight:600}
.prose blockquote{margin:1.6em 0;padding:4px 0 4px 20px;border-left:3px solid var(--accent);color:var(--muted);font-size:18px}
.prose .tbl{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.prose table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.5}
.prose th,.prose td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{background:var(--soft);font-weight:600}
.prose tr:last-child td{border-bottom:0}
.prose td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.callout{border:1px solid var(--line);background:var(--soft);border-radius:16px;padding:20px 22px;font-size:16px}
.callout b{display:block;margin-bottom:4px}
.answer{border:1px solid var(--line);border-radius:16px;padding:20px 22px;background:var(--bg);box-shadow:0 10px 40px -30px var(--accent)}
.answer b{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:6px;font-weight:500}
aside.side{display:flex;flex-direction:column;gap:16px;position:sticky;top:90px;align-self:start;min-width:0}
@media (max-width:960px){aside.side{position:static}}
.toc{border:1px solid var(--line);border-radius:16px;padding:18px 20px;font-size:14px}
.toc b{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:500}
.toc ol{margin:10px 0 0;padding-left:1.1em;display:flex;flex-direction:column;gap:7px}
.toc a{text-decoration:none;color:var(--muted)}.toc a:hover{color:var(--ink)}
.side-cta{border-radius:18px;padding:22px;background:var(--dark);color:var(--dark-fg);display:flex;flex-direction:column;gap:12px}
.side-cta p{color:var(--dark-muted);font-size:14px}
.side-cta .btn{background:var(--dark-fg);color:#0B0B0F;justify-content:center}
.cta-band{margin-block:48px;border-radius:24px;padding:40px;background:var(--dark);color:var(--dark-fg);display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center}
.cta-band h2{font-size:clamp(26px,3.4vw,38px);max-width:22ch;margin:0}
.cta-band p{color:var(--dark-muted);margin-top:8px}
.cta-band .btn{background:var(--dark-fg);color:#0B0B0F}
@media (max-width:600px){.cta-band{padding:28px 22px}}
.related{padding-block:24px 80px}
.related h2{font-size:24px;margin-bottom:18px}
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.link-cards a{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);border-radius:18px;padding:22px;text-decoration:none;background:var(--bg);transition:border-color .15s ease;min-width:0}
.link-cards a:hover{border-color:var(--ink)}
.link-cards span{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.link-cards b{font-weight:500;font-size:18px;letter-spacing:-0.02em;line-height:1.25}
.link-cards p{color:var(--muted);font-size:14px}
@media (max-width:860px){.link-cards{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.link-cards{grid-template-columns:1fr}}
.hub{padding-block:48px 80px}
.sources{font-size:14px;color:var(--muted)}
.sources ol{padding-left:1.2em}
.sources a{color:var(--muted)}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px}
.foot-links a{text-decoration:none}.foot-links a:hover{color:var(--ink)}
.notfound{padding-block:120px;text-align:center;display:flex;flex-direction:column;gap:18px;align-items:center}