:root{--bg:#0b1020;--panel:#131a2e;--panel2:#1a2340;--line:#27325a;--text:#e6ebff;--muted:#9aa6d1;--accent:#5b8cff;--accent2:#35d0ba;--ok:#2fd17c;--bad:#ff5d6c;--warn:#ffb84d}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 600px at 50% -200px,#1b2a5e55,transparent),var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.hero{max-width:860px;margin:0 auto;padding:72px 20px 40px;text-align:center}
.eyebrow{color:var(--accent2);text-transform:uppercase;letter-spacing:.12em;font-size:.8rem;margin:0}
h1{font-size:clamp(2rem,6vw,3.4rem);line-height:1.1;margin:.4em 0;background:linear-gradient(90deg,#fff,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
h2{font-size:1.6rem;margin:0 0 16px}
h3{margin:0 0 10px}
.lead{color:var(--muted);font-size:1.1rem}
main{max-width:1040px;margin:0 auto;padding:0 20px 40px}
section{margin:40px 0}
.btn{background:var(--panel2);color:var(--text);border:1px solid var(--line);padding:10px 18px;border-radius:10px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;display:inline-block;transition:.15s}
.btn:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px)}
.btn:focus-visible,select:focus-visible,textarea:focus-visible,input:focus-visible{outline:2px solid var(--accent2);outline-offset:2px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:linear-gradient(135deg,var(--accent),#7a5bff);border-color:transparent}
.btn.small{padding:6px 12px;font-size:.85rem;margin-bottom:6px}
.controls{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:12px 0}
.busy{color:var(--muted);display:inline-flex;gap:8px;align-items:center}
.spinner{width:16px;height:16px;border:2px solid var(--line);border-top-color:var(--accent2);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.status{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);padding:10px 14px;border-radius:8px;color:var(--muted)}
.status.error{border-left-color:var(--bad);color:#ffc2c8}
.status.ok{border-left-color:var(--ok)}
.diagram{display:grid;grid-template-columns:1fr 2fr 1fr;gap:12px;align-items:center;margin:24px 0}
.node{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:4px;transition:.3s}
.node.active{border-color:var(--accent2);box-shadow:0 0 24px #35d0ba33}
.avatar{width:48px;height:48px;border-radius:50%;background:var(--accent);display:grid;place-items:center;font-weight:700;font-size:1.3rem}
.avatar.bob{background:var(--accent2);color:#06231f}
.node small{color:var(--muted)}
.channel{display:flex;flex-direction:column;gap:6px;text-align:center;font-size:.85rem}
.wire{border-top:2px dashed var(--line);border-bottom:2px dashed var(--line);padding:4px;color:var(--muted)}
.arrow{opacity:.25;transition:.4s;color:var(--accent2)}
.arrow.on{opacity:1}
.steps{list-style:none;counter-reset:s;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:0 0 24px}
.steps li{counter-increment:s;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 12px 10px 46px;position:relative;color:var(--muted);font-size:.92rem}
.steps li::before{content:counter(s);position:absolute;left:12px;top:10px;width:24px;height:24px;border-radius:50%;background:var(--line);display:grid;place-items:center;font-size:.8rem;color:var(--text)}
.steps li.active{border-color:var(--accent);color:var(--text)}
.steps li.active::before{background:var(--accent)}
.steps li.done{color:var(--text)}
.steps li.done::before{content:"✓";background:var(--ok);color:#052}
.grid{display:grid;gap:16px;margin-bottom:16px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:16px}
.grid .card{margin-bottom:0}
.label{margin:12px 0 4px;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.06em}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.82rem;background:#0a0f20;border:1px solid var(--line);border-radius:8px;padding:10px;margin:0;white-space:pre-wrap;word-break:break-all;max-height:160px;overflow:auto}
.mono.plain{color:var(--accent2)}
.badge{display:inline-block;padding:6px 14px;border-radius:999px;font-weight:700;margin:0 0 8px}
.badge.neutral{background:var(--panel2);color:var(--muted)}
.badge.ok{background:#2fd17c22;color:var(--ok)}
.badge.bad{background:#ff5d6c22;color:var(--bad)}
.muted{color:var(--muted);font-size:.9rem;margin:0}
label{display:block;margin:10px 0 4px;font-weight:600}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.row label{margin:0}
select,textarea{width:100%;background:#0a0f20;color:var(--text);border:1px solid var(--line);border-radius:8px;padding:10px;font:inherit}
select{width:auto}
textarea{resize:vertical}
.check{display:flex;gap:8px;align-items:flex-start;font-weight:400;color:var(--muted);font-size:.9rem}
.alert{border-radius:12px;padding:14px 18px;margin:12px 0}
.alert.error{background:#ff5d6c1a;border:1px solid var(--bad);color:#ffc2c8}
.alert.warn{background:#ffb84d14;border:1px solid var(--warn)}
.alert.warn h2{color:var(--warn);font-size:1.3rem}
.alert p{margin:0}
code{background:var(--panel2);padding:1px 6px;border-radius:5px}
footer{text-align:center;color:var(--muted);padding:30px 20px;border-top:1px solid var(--line);font-size:.9rem}
@media(max-width:760px){.grid.two,.grid.three{grid-template-columns:1fr}.diagram{grid-template-columns:1fr}.hero{padding-top:48px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}