:root{--bg:#eef3f8;--ink:#0e1a2b;--muted:#4b5b70;--panel:#fff;--line:#d3dde9;--go:#0b9a77;--run:#e09b00;--term:#0e1a2b}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 "Segoe UI",system-ui,-apple-system,Roboto,sans-serif}
a{color:inherit}
:focus-visible{outline:3px solid var(--go);outline-offset:3px}
.nav,.hero,.course,.join,footer{max-width:1120px;margin:0 auto;padding-left:24px;padding-right:24px}
.nav{display:flex;justify-content:space-between;align-items:center;padding-top:22px;padding-bottom:22px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:22px;letter-spacing:-.02em;text-decoration:none}
.logo svg{color:var(--go)}
.nav nav{display:flex;gap:22px;align-items:center}
.nav a{text-decoration:none;font-weight:600}
.pill{background:var(--ink);color:#fff;padding:8px 16px;border-radius:999px}
.hero{display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center;padding-top:48px;padding-bottom:72px}
h1{font-size:clamp(40px,6vw,68px);line-height:1.02;letter-spacing:-.035em;margin:0 0 20px;font-weight:800}
h2{font-size:clamp(28px,3.4vw,40px);line-height:1.1;letter-spacing:-.025em;margin:0 0 16px}
.copy p{max-width:46ch;color:var(--muted);margin:0 0 24px}
.btn{display:inline-block;border:0;cursor:pointer;background:var(--go);color:#fff;font:700 17px/1 inherit;padding:16px 26px;border-radius:10px;text-decoration:none}
.btn:hover{filter:brightness(1.08)}
.btn.alt{background:transparent;color:#cfe3f5;border:1px solid #38506d;padding:12px 18px;font-size:15px;margin-top:16px}
.note{font-size:14px;margin-top:14px!important}
.rig{background:var(--term);border-radius:18px;padding:26px;color:#d7e6f5}
.stages{list-style:none;margin:0 0 20px;padding:0;display:flex;justify-content:space-between;position:relative}
.stages::before{content:"";position:absolute;left:8%;right:8%;top:17px;height:2px;background:#2b4261}
.stages li{position:relative;text-align:center;font-size:13px;font-weight:600;width:20%}
.stages i{display:block;width:36px;height:36px;margin:0 auto 8px;border-radius:50%;background:var(--term);border:2px solid #38506d;transition:background .25s,border-color .25s}
.stages li.running i{border-color:var(--run);background:var(--run)}
.stages li.done i{border-color:var(--go);background:var(--go)}
.log{margin:0;min-height:176px;font:14px/1.7 ui-monospace,Menlo,Consolas,monospace;white-space:pre-wrap;color:#9fd8c6}
.course,.join{padding-top:56px;padding-bottom:56px}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.tabs button{font:600 16px/1 inherit;padding:12px 18px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:32px}
.panel h3{margin:0 0 8px;font-size:26px;letter-spacing:-.02em}
.panel p{margin:0;color:var(--muted)}
.panel .ship{border-left:4px solid var(--go);padding-left:18px}
.join{display:grid;grid-template-columns:1fr 1fr;gap:48px;border-top:1px solid var(--line)}
.count{font-weight:700;color:var(--go)}
form{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;display:grid;gap:16px}
label{display:grid;gap:6px;font-weight:600;font-size:15px}
input{font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff}
.msg{margin:0;font-weight:600;min-height:1.5em}
.msg.ok{color:var(--go)}.msg.err{color:#b3261e}
footer{display:flex;justify-content:space-between;padding-top:28px;padding-bottom:40px;font-size:14px;color:var(--muted);border-top:1px solid var(--line)}
@media(max-width:820px){.hero,.join,.panel{grid-template-columns:1fr}.hero{gap:32px}.stages li{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400}
.check input{margin-top:5px}
.hp{position:absolute;left:-9999px}