:root {
  --bg: #0d1520;
  --bg2: #111d2c;
  --card: #16263a;
  --line: #26405c;
  --text: #dbe7f3;
  --muted: #8ba3bd;
  --accent: #3fa9f5;
  --accent-d: #1c7fc4;
  --ok: #4ade80;
  --err: #f87171;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 12% -6%, #173a5c 0%, transparent 60%),
    radial-gradient(760px 420px at 88% 8%, #123b33 0%, transparent 60%),
    linear-gradient(var(--bg), var(--bg2));
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 21, 32, 0.82);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--accent); }
.brand-name { font-size: 20px; font-weight: 700; color: var(--text); }
.brand-tag {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2px 10px;
}
.topnav { display: flex; gap: 18px; }
.topnav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.topnav a:hover { color: var(--text); }
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 34px 22px 20px;
  display: grid;
  gap: 26px;
}
.hero h1 { margin: 0 0 10px; font-size: 30px; line-height: 1.2; }
.lead { margin: 0; color: var(--muted); font-size: 16px; max-width: 640px; }
.stats {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  margin: 20px 0 0;
  padding: 0;
}
.stats div { min-width: 130px; }
.stats dt { font-size: 22px; font-weight: 700; color: var(--accent); }
.stats dd { margin: 2px 0 0; font-size: 13px; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}
.card h2 { margin: 0 0 14px; font-size: 19px; }
.card label { display: block; margin: 12px 0; font-size: 14px; }
.card input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  font-size: 15px;
  color: var(--text);
  background: #0e1a29;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.card input:focus { outline: none; border-color: var(--accent); }
.opt { color: var(--muted); font-size: 12px; font-weight: 400; }
.card button {
  width: 100%;
  margin-top: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--accent-d);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
.card button:hover:not(:disabled) { background: var(--accent); }
.card button:disabled { opacity: 0.65; cursor: wait; }
.form-error {
  margin: 10px 0 0;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--err);
  border: 1px solid var(--err);
  border-radius: 8px;
  background: rgba(248, 113, 113, 0.08);
}
.hint { font-size: 12.5px; color: var(--muted); }
.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.cols article {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  background: rgba(22, 38, 58, 0.6);
}
.cols h3 { margin: 0 0 8px; font-size: 15px; }
.cols p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.55; }
.ok { color: var(--ok); }
.foot {
  border-top: 1px solid var(--line);
  padding: 16px 28px 26px;
  color: var(--muted);
  font-size: 12.5px;
}
@media (max-width: 640px) {
  .hero h1 { font-size: 24px; }
  .top { padding: 14px 16px; }
  .wrap { padding: 24px 14px 14px; }
}