:root{
  --bg:#070b12; --panel:rgba(18,26,40,.72); --line:#1e3350;
  --ice:#7fd4ff; --ice2:#bfeaff; --gold:#e6b74a; --gold2:#f5d488;
  --txt:#dce6f2; --muted:#8aa0bd;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--txt);min-height:100vh;position:relative;overflow-x:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
b{color:var(--ice2)}
.muted{color:var(--muted)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#0d1626;border:1px solid var(--line);
  padding:2px 7px;border-radius:5px;color:var(--ice2)}
a{color:var(--ice)}

/* animated icy aurora background */
.aurora{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60vw 40vw at 15% -10%, rgba(60,140,220,.28), transparent 60%),
    radial-gradient(50vw 40vw at 90% 0%, rgba(90,200,255,.20), transparent 55%),
    radial-gradient(70vw 50vw at 50% 120%, rgba(120,90,200,.16), transparent 60%),
    linear-gradient(#050810,#0a1220);
  animation:drift 18s ease-in-out infinite alternate}
@keyframes drift{from{filter:hue-rotate(0deg)}to{filter:hue-rotate(24deg)}}

.site-head{display:flex;justify-content:space-between;align-items:center;padding:18px 28px}
.logo{font-size:20px}
.logo b{color:var(--gold2);letter-spacing:.02em}
.head-stats{color:var(--muted);font-size:14px;display:flex;align-items:center;gap:7px}
.dot{width:9px;height:9px;border-radius:50%;background:#4caf50;box-shadow:0 0 10px #4caf50;display:inline-block}
.head-stats span:nth-child(2){color:var(--ice2);font-weight:600}

/* hero */
.hero{max-width:1120px;margin:0 auto;padding:30px 24px 60px;display:grid;
  grid-template-columns:1.2fr .9fr;gap:40px;align-items:start}
.badge{display:inline-block;background:rgba(127,212,255,.1);border:1px solid var(--line);
  color:var(--ice2);padding:6px 12px;border-radius:20px;font-size:13px;letter-spacing:.02em}
h1{font-size:52px;line-height:1.05;margin:18px 0 14px;font-weight:800;letter-spacing:-.01em}
.grad{background:linear-gradient(120deg,var(--ice),var(--gold2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:17px;color:#b8c8dd;max-width:520px;line-height:1.55}

.steps{margin-top:34px}
.steps h3{color:var(--gold);font-size:15px;text-transform:uppercase;letter-spacing:.05em}
.steps ol{padding-left:20px;line-height:1.7}
.steps li{margin-bottom:12px;color:#c4d3e6}
.copybox{display:flex;align-items:center;gap:0;margin-top:8px;max-width:340px}
.copybox code{flex:1;border-radius:7px 0 0 7px;border-right:none;padding:9px 11px}
.copybox button{border:1px solid var(--line);border-radius:0 7px 7px 0;background:#12233a;color:var(--ice2);
  padding:9px 12px;cursor:pointer;font-size:15px}
.copybox button:hover{background:#173050}

/* register card */
.reg-card{background:var(--panel);backdrop-filter:blur(8px);border:1px solid var(--line);
  border-radius:16px;padding:26px;box-shadow:0 24px 70px rgba(0,0,0,.5)}
.reg-card h2{margin:0 0 2px;color:var(--gold2);font-size:22px}
.reg-card form{display:flex;flex-direction:column;gap:13px;margin-top:16px}
label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}
input{background:#0c1524;border:1px solid var(--line);color:var(--txt);padding:11px 13px;
  border-radius:9px;outline:none;font-size:15px}
input:focus{border-color:var(--ice)}
.reg-card button[type=submit]{margin-top:6px;background:linear-gradient(120deg,#2a7fb8,#1c5f92);
  border:1px solid #3a8fc8;color:#eaf6ff;padding:13px;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer}
.reg-card button[type=submit]:hover{filter:brightness(1.1)}
.reg-card button[disabled]{opacity:.6;cursor:default}
.msg{font-size:14px;min-height:1px;text-align:center}
.msg.ok{color:#7fe08a}
.msg.err{color:#ff9b8f}
.hint{font-size:12px;margin:14px 0 0;line-height:1.5}

.site-foot{max-width:1120px;margin:0 auto;padding:22px 24px 40px;display:flex;justify-content:space-between;
  border-top:1px solid var(--line);color:var(--muted);font-size:14px;flex-wrap:wrap;gap:8px}

@media(max-width:820px){
  .hero{grid-template-columns:1fr;gap:28px}
  h1{font-size:40px}
  .hero-right{order:-1}
}