:root{--bg:#f6f6f7;--card:#fff;--ink:#17181a;--muted:#666a70;--line:#dedfe2;--strong:#b8bbc0;--soft:#eeeef0;--sans:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--mono:"SFMono-Regular",Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 var(--sans);-webkit-font-smoothing:antialiased}.icon-library{position:absolute;width:0;height:0;overflow:hidden}svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.nav{height:68px;position:sticky;top:0;z-index:10;background:#fffffff0;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav-inner,.nav-links,.brand,.btn,.proof span{display:flex;align-items:center}.nav-inner{height:100%}.brand{gap:10px;text-decoration:none;font-weight:700;letter-spacing:-.02em}.brand img{width:26px;height:26px}.brand span{color:var(--muted);font-weight:500}.nav-links{gap:25px;margin-left:auto}.nav-links>a:not(.btn),footer a{color:var(--muted);text-decoration:none;font-size:14px}.nav-links>a:hover,footer a:hover{color:var(--ink)}.btn{justify-content:center;gap:8px;min-height:40px;padding:0 16px;border:1px solid var(--ink);border-radius:6px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;font-size:14px;transition:.16s}.btn:hover{transform:translateY(-1px);box-shadow:0 5px 16px #0002}.btn-ghost{background:#fff;color:var(--ink);border-color:var(--strong)}.btn-small{min-height:34px;padding:0 13px}.btn svg{width:16px}.hero{padding:92px 0 84px;border-bottom:1px solid var(--line);background:linear-gradient(#fff,#fafafa 70%,var(--bg));overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:74px;align-items:center}.eyebrow{display:flex;align-items:center;gap:9px;margin-bottom:22px;color:var(--muted);font:600 12px var(--mono);letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:18px;border-top:1px solid}h1{margin:0;font-size:clamp(45px,6vw,72px);line-height:.99;letter-spacing:-.062em}.lead{max-width:600px;margin:26px 0 0;color:var(--muted);font-size:19px}.actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:32px}.proof{display:flex;flex-wrap:wrap;gap:18px;margin-top:35px;color:var(--muted);font-size:13px}.proof span{gap:7px}.proof svg{width:15px}.auth-window{position:relative;border:1px solid var(--strong);border-radius:10px;background:#fff;box-shadow:0 28px 70px #0002;transform:rotate(1deg)}.auth-window:before{content:"";position:absolute;inset:16px -18px -18px 18px;border:1px solid var(--line);border-radius:10px;z-index:-1;background:#ededee}.window-bar{height:45px;display:flex;align-items:center;gap:6px;padding:0 14px;border-bottom:1px solid var(--line)}.window-bar i{width:8px;height:8px;border:1px solid #aaa;border-radius:50%}.window-bar code{margin-left:auto;color:var(--muted);font:11px var(--mono)}.receipt{padding:24px}.receipt header{display:flex;justify-content:space-between;padding-bottom:18px;border-bottom:1px dashed var(--strong)}.verified{font:600 11px var(--mono);text-transform:uppercase}.verified:before{content:"";display:inline-block;width:7px;height:7px;margin-right:7px;background:#282a2d;border-radius:50%;box-shadow:0 0 0 4px #ececee}.route{display:grid;grid-template-columns:32px 1fr;gap:12px;padding-top:20px}.route>b{width:28px;height:28px;display:grid;place-items:center;border:1px solid var(--strong);border-radius:50%;font:600 11px var(--mono);position:relative}.route:not(.last)>b:after{content:"";position:absolute;top:34px;height:51px;border-left:1px dashed var(--strong)}.route strong,.route small{display:block}.route small{color:var(--muted)}.route code{display:block;overflow:hidden;margin-top:9px;padding:9px 11px;background:var(--bg);border:1px solid var(--line);border-radius:5px;color:#444;font:11px var(--mono);white-space:nowrap;text-overflow:ellipsis}.section{padding:104px 0;border-bottom:1px solid var(--line)}.section-head{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:end;margin-bottom:50px}h2{margin:0;font-size:clamp(34px,4.5vw,52px);line-height:1.06;letter-spacing:-.048em}.section-head p{margin:0;color:var(--muted);font-size:17px}.flow{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden;box-shadow:0 10px 30px #00000009}.flow article{min-height:340px;padding:28px;position:relative}.flow article+article{border-left:1px solid var(--line)}.step{display:flex;justify-content:space-between;color:var(--muted);font:600 11px var(--mono);letter-spacing:.06em;text-transform:uppercase}.step b{width:26px;height:26px;display:grid;place-items:center;border:1px solid var(--line);border-radius:5px;color:var(--ink)}h3{margin:28px 0 10px;font-size:21px;letter-spacing:-.025em}.flow article>p,.security-list p,.code-copy p{margin:0;color:var(--muted)}.mini{position:absolute;left:28px;right:28px;bottom:28px;padding:14px;border:1px solid var(--line);border-radius:6px;background:var(--bg)}.mini label{display:block;margin-bottom:7px;color:var(--muted);font-size:11px}.input{display:flex;justify-content:space-between;padding:9px 10px;border:1px solid var(--strong);border-radius:5px;background:#fff;font:12px var(--mono)}.mail,.success{display:flex;gap:11px;align-items:center}.round{width:33px;height:33px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:#fff}.round svg{width:16px}.round.dark{background:var(--ink);color:#fff}.mail strong,.mail small,.success strong,.success small{display:block}.mail small,.success small{color:var(--muted);font-size:10px}.security-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px}.security-lead{min-height:460px;padding:38px;display:flex;flex-direction:column;border-radius:8px;background:var(--ink);color:#fff}.security-lead .eyebrow{color:#b6b7ba}.security-lead h2{font-size:45px}.security-lead>p{color:#bfc1c5}.token{margin-top:auto;border:1px solid #4b4e53;border-radius:6px;overflow:hidden}.token small{display:block;padding:8px 11px;border-bottom:1px solid #4b4e53;color:#aeb0b4;font:10px var(--mono);text-transform:uppercase}.token>div{display:grid;grid-template-columns:.8fr 1.3fr .9fr;gap:2px;padding:13px;font:11px var(--mono)}.token span{overflow:hidden;padding:8px;background:#282a2e;text-overflow:ellipsis}.security-list{display:grid;grid-template-columns:1fr 1fr;gap:20px}.security-list article{padding:28px;border:1px solid var(--line);border-radius:8px;background:#fff}.security-list article>svg{width:23px;height:23px;margin-bottom:27px}.security-list h3{margin:0 0 8px;font-size:18px}.security-list p{font-size:14px}.code-layout{display:grid;grid-template-columns:.76fr 1.24fr;border:1px solid var(--strong);border-radius:10px;overflow:hidden;background:#fff}.code-copy{padding:42px}.code-copy h2{font-size:42px}.code-copy ul{list-style:none;margin:30px 0 0;padding:0;border-top:1px solid var(--line)}.code-copy li{display:flex;gap:10px;padding:13px 0;border-bottom:1px solid var(--line)}.code-copy li:before{content:"✓";font-weight:700}.code-panel{min-width:0;background:#1a1b1e;color:#c1c3c7}.tabs{display:flex;border-bottom:1px solid #383a3e}.tabs button{padding:14px 18px;border:0;border-right:1px solid #383a3e;background:transparent;color:#8f9298;cursor:pointer;font:12px var(--mono)}.tabs button.active{color:#fff;background:#24262a}pre{margin:0;padding:30px;overflow:auto;font:12px/1.8 var(--mono)}pre em{color:#85888f;font-style:normal}pre b{color:#fff}.final{padding:100px 0 45px;background:#fff}.final-box{display:flex;align-items:center;justify-content:space-between;gap:35px;padding-bottom:80px}.final-box h2{max-width:650px}.final-box p{margin:14px 0 0;color:var(--muted)}footer{display:flex;flex-wrap:wrap;align-items:center;gap:22px;padding-top:25px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}footer .brand{margin-right:auto;color:var(--ink)}:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
@media(max-width:900px){.hero-grid,.section-head,.security-grid,.code-layout{grid-template-columns:1fr}.hero-grid{gap:60px}.auth-window{max-width:580px}.flow{grid-template-columns:1fr}.flow article{min-height:310px}.flow article+article{border-left:0;border-top:1px solid var(--line)}.security-lead{min-height:400px}.code-copy{padding:34px}}
@media(max-width:620px){.wrap{width:calc(100% - 28px)}.nav-links>a:not(.btn){display:none}.hero{padding:66px 0}.lead{font-size:17px}.proof{display:grid}.auth-window{transform:none}.auth-window:before{display:none}.section{padding:76px 0}.section-head{gap:20px;margin-bottom:34px}.security-list{grid-template-columns:1fr}.security-lead{padding:28px;min-height:440px}.security-lead h2,.code-copy h2{font-size:36px}.token>div{grid-template-columns:1fr}.final-box{align-items:flex-start;flex-direction:column}.actions{flex-direction:column;width:100%}.btn{width:100%}.nav .btn{width:auto}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}

/* Reviewed refinements */
.nav .brand{gap:12px;color:var(--ink);font-size:18px}.nav .brand img{width:34px;height:34px}
.auth-window:before{display:none}
.security-list{display:flex;flex-direction:column;gap:0;border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden}
.security-list article{position:relative;padding:0;border:0;border-radius:0;background:#fff;transition:background .25s}
.security-list article+article{border-top:1px solid var(--line)}
.security-list article.active{background:#fafafa}
.security-list button{width:100%;min-height:100px;display:grid;grid-template-columns:44px 1fr 24px;gap:18px;align-items:center;padding:24px 28px;border:0;background:transparent;color:var(--ink);text-align:left;cursor:pointer}
.security-list button>span:nth-child(2){display:grid;grid-template-columns:36px 1fr;align-items:baseline;font-size:18px;font-weight:700;letter-spacing:-.02em}
.security-list button small{color:var(--muted);font:11px var(--mono);letter-spacing:.05em}
.security-list button b{font-size:20px;font-weight:400;text-align:center}
.accordion-icon{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;background:#fff}
.accordion-icon svg{width:20px;height:20px}
.accordion-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .38s ease}
.accordion-body>p{min-height:0;overflow:hidden;margin:0!important;padding:0 94px;color:var(--muted);font-size:15px!important}
.security-list article.active .accordion-body{grid-template-rows:1fr}
.security-list article.active .accordion-body>p{padding-bottom:28px}
@media(max-width:620px){.nav .brand{font-size:16px}.nav .brand img{width:30px;height:30px}.security-list button{grid-template-columns:38px 1fr 20px;gap:12px;padding:20px;min-height:88px}.security-list button>span:nth-child(2){grid-template-columns:1fr;gap:2px;font-size:16px}.accordion-icon{width:38px;height:38px}.accordion-body>p{padding-inline:70px 26px}.security-list article.active .accordion-body>p{padding-bottom:24px}}
@media(prefers-reduced-motion:reduce){.accordion-body{transition:none}}