:root { --bg: #0e1a3a; --card: #16264f; --ink: #fff; --soft: #b9c4e4; --blue: #2f62e6; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 24px 16px;
  font: 17px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(180deg, #1c2f63, var(--bg)); color: var(--ink); }
main { width: 100%; max-width: 420px; text-align: center; }
.logo { width: 88px; height: 88px; border-radius: 22px; box-shadow: 0 8px 30px #0006; }
h1 { font-size: 30px; margin: 16px 0 4px; letter-spacing: -0.5px; }
.card { background: var(--card); border-radius: 22px; padding: 22px; margin: 22px 0; text-align: left; }
.card h2 { margin: 0 0 4px; font-size: 22px; }
.soft { color: var(--soft); }
.code { font: 600 28px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 3px; text-align: center;
  background: #0b1430; border-radius: 14px; padding: 16px; margin: 14px 0 6px; user-select: all; }
.btn { display: block; background: var(--blue); color: #fff; text-decoration: none; font-weight: 600; border-radius: 14px;
  padding: 15px; margin-top: 12px; text-align: center; border: 0; width: 100%; font-size: 17px; cursor: pointer; }
.btn.ghost { background: transparent; border: 1px solid #ffffff33; }
ol { padding-left: 20px; margin: 8px 0 0; } li { margin: 6px 0; }
small { color: var(--soft); }