:root{
  --bg:#070708;
  --card:#111214;
  --ink:#f7f7f8;
  --muted:#9a9ca3;
  --line:rgba(255,255,255,.09);
}
*{box-sizing:border-box}
html,body{min-height:100%}
html{background:var(--bg)}
body{
  margin:0;
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(circle at 78% 7%,rgba(255,255,255,.07),transparent 24%),
    radial-gradient(circle at 12% 24%,rgba(255,255,255,.035),transparent 20%),
    linear-gradient(180deg,#050506 0%,#09090b 48%,#060607 100%);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.18;
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:linear-gradient(to bottom,#000,transparent 82%);
}
.verify-shell{
  min-height:100vh;
  min-height:100dvh;
  display:grid;
  place-items:center;
  padding:28px 18px;
}
.verify-card{
  width:min(100%,430px);
  position:relative;
  padding:34px;
  border:1px solid var(--line);
  border-radius:26px;
  background:linear-gradient(145deg,rgba(20,21,24,.98),rgba(13,14,16,.98));
  box-shadow:0 30px 90px rgba(0,0,0,.52),inset 0 1px 0 rgba(255,255,255,.03);
}
.verify-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:30px;
  padding:0 11px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.09);
  background:rgba(255,255,255,.035);
  color:#b8bac0;
  font-size:10px;
  font-weight:800;
  letter-spacing:.16em;
}
.verify-badge span{
  width:6px;height:6px;border-radius:50%;
  background:#fff;
  box-shadow:0 0 12px rgba(255,255,255,.72);
}
h1{
  margin:22px 0 9px;
  font-size:30px;
  line-height:1.15;
  letter-spacing:-.035em;
}
.verify-subtitle{
  margin:0;
  color:var(--muted);
  font-size:14px;
  line-height:1.7;
}
.challenge{
  margin:26px 0 22px;
  min-height:82px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(255,255,255,.085);
  border-radius:18px;
  background:#08090a;
  color:#fff;
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  font-size:28px;
  font-weight:800;
  letter-spacing:.28em;
  text-indent:.28em;
  box-shadow:inset 0 1px 16px rgba(0,0,0,.28);
  user-select:none;
}
label{
  display:block;
  margin:0 0 8px;
  color:#85878e;
  font-size:11px;
  font-weight:800;
  letter-spacing:.09em;
}
input{
  width:100%;
  min-height:50px;
  appearance:none;
  border:1px solid rgba(255,255,255,.09);
  border-radius:14px;
  outline:none;
  padding:0 14px;
  background:#090a0b;
  color:#f5f5f6;
  font:inherit;
  font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
input::placeholder{color:#5f6269}
input:focus{
  border-color:rgba(255,255,255,.23);
  background:#0b0c0e;
  box-shadow:0 0 0 4px rgba(255,255,255,.035);
}
button{
  width:100%;
  min-height:50px;
  margin-top:12px;
  appearance:none;
  border:0;
  border-radius:14px;
  cursor:pointer;
  background:#fff;
  color:#050506;
  font:inherit;
  font-size:14px;
  font-weight:800;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease;
  box-shadow:0 8px 28px rgba(255,255,255,.07),inset 0 -1px 0 rgba(0,0,0,.14);
}
button:hover{background:#f1f1f2;box-shadow:0 10px 32px rgba(255,255,255,.11)}
button:active{transform:scale(.988)}
.error{
  margin-top:10px;
  padding:10px 12px;
  border:1px solid rgba(255,120,120,.16);
  border-radius:12px;
  background:rgba(255,90,90,.055);
  color:#e9a8a8;
  font-size:12px;
  line-height:1.55;
}
.verify-footnote{
  margin:20px 0 0;
  color:#666970;
  text-align:center;
  font-size:11px;
  line-height:1.6;
}
@media(max-width:520px){
  .verify-card{padding:27px 22px;border-radius:22px}
  h1{font-size:27px}
  .challenge{min-height:76px;font-size:25px}
}