* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #0b1020;
  color: #e8ecff;
}
.card {
  width: min(560px, calc(100% - 32px));
  margin: 48px auto;
  padding: 22px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}
h1 { margin: 0 0 12px; font-size: 24px; }
p { margin: 10px 0; line-height: 1.4; }
.muted { color: rgba(232, 236, 255, 0.72); font-size: 13px; }
label { display: block; margin: 14px 0 6px; font-weight: 600; }
select, input {
  width: 100%;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.25);
  color: #e8ecff;
  outline: none;
}
select:focus, input:focus { border-color: rgba(120, 162, 255, 0.65); }

/* Select dropdown list: white background, black text */
select option {
  background: #ffffff;
  color: #000000;
}
.btn {
  display: inline-block;
  margin-top: 16px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #e8ecff;
  text-decoration: none;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.08);
}
.btn.primary {
  width: 100%;
  font-weight: 700;
  background: linear-gradient(135deg, #5b7cff, #22c55e);
  border: none;
  color: #071018;
}
code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}