:root{--bg:#05080b;--card:#0b141c;--card2:#0f1b25;--line:#1b2a37;--tx:#e8eef3;--dim:#9fb2c0;--faint:#6c8497;--acc:#26c6da;--warn:#ffb74d;--ok:#4ade80;--bad:#ef5350;
--sans:"Inter","Segoe UI","Helvetica Neue",Roboto,Arial,system-ui,sans-serif;--mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:17px/1.65 var(--sans)}
a{color:var(--acc)}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.top{position:sticky;top:0;z-index:5;background:rgba(5,8,11,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap}
.mark{font-weight:600;letter-spacing:.32em;font-size:1.1rem;color:var(--tx);text-decoration:none}
nav{display:flex;gap:4px 18px;flex-wrap:wrap;margin-left:auto}nav a{color:var(--dim);text-decoration:none;font-size:.92rem;padding:10px 4px;min-height:44px;display:inline-flex;align-items:center}nav a:hover{color:var(--tx)}
.badge{display:inline-flex;align-items:center;gap:9px;font:600 .74rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--warn);border:1px solid rgba(255,183,77,.45);background:rgba(255,183,77,.07);border-radius:999px;padding:7px 14px}
.badge i{width:8px;height:8px;border-radius:50%;background:currentColor}
.hero{padding:84px 0 56px;background:radial-gradient(900px 380px at 78% -10%,rgba(38,198,218,.13),transparent 70%)}
h1{font-size:clamp(2.1rem,5.4vw,3.6rem);line-height:1.08;letter-spacing:-.02em;font-weight:600;margin:20px 0 18px;max-width:17em}
.lede{font-size:clamp(1.05rem,2.2vw,1.28rem);color:var(--dim);max-width:40em;margin:0 0 28px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 24px;border-radius:10px;border:1px solid var(--acc);background:rgba(38,198,218,.12);color:var(--acc);font:600 1rem var(--sans);text-decoration:none;cursor:pointer}
.btn:hover{background:rgba(38,198,218,.2)}.btn.ghost{border-color:var(--line);background:transparent;color:var(--dim)}
section{padding:60px 0;border-top:1px solid var(--line)}
.kicker{font:500 .74rem var(--mono);letter-spacing:.24em;color:var(--faint);text-transform:uppercase;margin:0 0 10px}
h2{font-size:clamp(1.5rem,3.4vw,2.2rem);line-height:1.2;margin:0 0 16px;letter-spacing:-.01em;font-weight:600}
h3{font-size:1.1rem;margin:0 0 6px}
p{margin:0 0 14px;color:var(--dim);max-width:44em}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-top:26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}.card p{margin:0;font-size:.97rem}
.card .tag{font:600 .7rem var(--mono);letter-spacing:.2em;color:var(--acc);margin-bottom:10px;display:block}
.two{display:grid;gap:34px;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center}
.diagram{width:100%;height:auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px}
.diagram .b{fill:#0b141c;stroke:#2b4254;stroke-width:1.5}.diagram .bk{fill:#071c26;stroke:#4fc3f7;stroke-width:2}.diagram .t{fill:#e8eef3;font:600 12px var(--sans)}.diagram .s{fill:#6c8497;font:10px var(--mono)}
.diagram .l{stroke:#3b5a70;stroke-width:2;fill:none}.diagram .d{stroke:#7e57c2;stroke-width:2;fill:none;stroke-dasharray:5 5}
ul.ticks{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
ul.ticks li{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--card);color:var(--dim);font-size:.95rem}ul.ticks b{display:block;color:var(--tx);font-weight:600}
.notice{border:1px solid rgba(255,183,77,.4);background:rgba(255,183,77,.06);border-radius:14px;padding:18px 22px;color:var(--dim)}.notice b{color:var(--warn)}
form{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px;max-width:620px}
label{display:block;font-size:.88rem;color:var(--dim);margin:16px 0 6px}label:first-of-type{margin-top:0}
input[type=text],input[type=email],textarea{width:100%;background:var(--card2);color:var(--tx);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font:inherit;min-height:50px}
textarea{min-height:130px;resize:vertical}
.check{display:flex;gap:12px;align-items:flex-start;margin-top:18px;color:var(--dim);font-size:.9rem}.check input{width:22px;height:22px;margin-top:3px;flex:0 0 auto}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.msg{margin-top:16px;padding:12px 16px;border-radius:10px;font-size:.95rem}.msg.ok{background:rgba(74,222,128,.08);border:1px solid rgba(74,222,128,.4);color:var(--ok)}.msg.bad{background:rgba(239,83,80,.08);border:1px solid rgba(239,83,80,.4);color:var(--bad)}
footer{border-top:1px solid var(--line);padding:36px 0 60px;color:var(--faint);font-size:.9rem}footer .wrap{display:flex;gap:14px 28px;flex-wrap:wrap;justify-content:space-between}
.prose{max-width:46em;padding:60px 0}.prose h2{margin-top:34px;font-size:1.3rem}.prose li{color:var(--dim);margin-bottom:6px}
@media(max-width:820px){.two{grid-template-columns:minmax(0,1fr)}.hero{padding:52px 0 36px}section{padding:44px 0}nav{margin-left:0;width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.grid.tight{margin-top:18px}.btn.full{margin-top:22px;width:100%}.h1s{font-size:2rem;margin-top:8px}

/* ---- site v2 ---- */
html{color-scheme:dark}.skip{position:absolute;left:-999px;top:8px;background:var(--acc);color:#001318;padding:10px 16px;border-radius:8px;z-index:20}.skip:focus{left:12px}
nav a[aria-current=page]{color:var(--tx);border-bottom:2px solid var(--acc)}nav a.signin{border:1px solid var(--line);border-radius:999px;padding:0 16px;min-height:40px;align-self:center;color:var(--tx)}nav a.signin:hover{border-color:var(--acc);color:var(--acc)}
.mark.small{font-size:.95rem}.fine{font-size:.85rem;color:var(--faint)}.hero .two{align-items:center}
.sub{padding:64px 0 36px;background:radial-gradient(900px 320px at 80% -20%,rgba(38,198,218,.12),transparent 70%)}.sub .lede{margin-bottom:0}
.facts{padding:34px 0;background:var(--card)}.grid3{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.facts b{display:block;margin-bottom:4px}.facts p{margin:0;font-size:.95rem}
.slot{margin:0;width:100%;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--card2)}.slot img{display:block;width:100%;height:100%;object-fit:cover}.slot picture{display:block;width:100%;height:100%}
.r16x10{aspect-ratio:16/10}.r4x3{aspect-ratio:4/3}.r16x9{aspect-ratio:16/9}.slot.wide{margin-top:26px}
.ph{width:100%;height:100%;display:grid;place-items:center;background:linear-gradient(rgba(38,198,218,.06) 1px,transparent 1px) 0 0/28px 28px,linear-gradient(90deg,rgba(38,198,218,.06) 1px,transparent 1px) 0 0/28px 28px,radial-gradient(circle at 50% 40%,#0f2430,#071018)}
.ph span{font:600 .8rem var(--mono);letter-spacing:.32em;color:var(--faint)}
.grid.two-up{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.card.media .slot{margin-bottom:16px}.card .more{margin-top:12px}
.example{border:1px solid var(--line);border-left:3px solid var(--acc);background:var(--card);border-radius:12px;padding:18px 22px;margin:0 0 16px;max-width:46em}.example .eg{font:600 .72rem var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin:0 0 8px}.example .quote{margin:0;color:var(--tx);font-size:1.05rem}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;margin:18px 0 10px}table{width:100%;border-collapse:collapse;min-width:560px;background:var(--card)}th,td{text-align:left;padding:12px 16px;border-top:1px solid var(--line);font-size:.95rem;vertical-align:top}thead th{border-top:0;color:var(--dim);font-weight:600}tbody th{color:var(--tx);font-weight:500}td{color:var(--dim)}
ol.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px}ol.steps li{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}ol.steps li>span{flex:none;width:36px;height:36px;border-radius:50%;border:1px solid var(--acc);color:var(--acc);display:grid;place-items:center;font:600 .95rem var(--mono)}ol.steps p{margin:0}
ul.plain{margin:14px 0 24px;padding-left:20px;max-width:44em}ul.plain li{color:var(--dim);margin-bottom:8px}
details{border:1px solid var(--line);border-radius:12px;background:var(--card);margin:0 0 10px;max-width:46em}summary{cursor:pointer;padding:16px 20px;font-weight:600;min-height:52px;list-style-position:inside}details p{padding:0 20px 16px;margin:0}
footer .wrap>div:first-child p{margin:6px 0 0;max-width:30em}footer .links{display:flex;gap:6px 22px;flex-wrap:wrap;align-items:flex-start}footer .links a{color:var(--dim);text-decoration:none;min-height:32px;display:inline-flex;align-items:center}footer .links a:hover{color:var(--tx)}
@media(max-width:820px){.first-on-desktop{order:0}h1{margin-top:16px}nav{gap:0 12px}ol.steps li{padding:16px;gap:14px}}
@media(min-width:821px){.two>.first-on-desktop{order:0}}