* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 800px at 10% 10%, #0f1b2a, #070b10 70%);
  color: #e6edf3;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  overflow-x: hidden;
}
.wrap {
  width: 100%;
  max-width: 360px;
  padding: 24px;
  border: 1px solid #1f2937;
  border-radius: 16px;
  background: rgba(8, 12, 18, 0.9);
  box-shadow: 0 0 30px rgba(35, 134, 54, 0.2);
  text-align: center;
}
.logo {
  font-weight: 700;
  letter-spacing: 3px;
  color: #7ee787;
  margin-bottom: 8px;
}
h1 { margin: 0 0 6px 0; font-size: 22px; }
form { display: grid; gap: 12px; margin-top: 12px; }
input {
  width: 100%;
  font-size: 26px;
  text-align: center;
  padding: 12px 10px;
  border-radius: 12px;
  border: 1px solid #1f2937;
  background: #0b0f14;
  color: #e6edf3;
  letter-spacing: 6px;
}
button {
  width: 100%;
  background: #238636;
  border: none;
  color: white;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
@media (max-width: 480px) {
  h1 { font-size: 20px; }
  input { font-size: 22px; letter-spacing: 4px; }
}