*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #e8edf2;
  background: radial-gradient(1200px 600px at 50% -10%, #1d2a33 0%, #101418 60%) fixed, #101418;
  -webkit-text-size-adjust: 100%;
}
.wrap {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
}
.card {
  width: 100%;
  max-width: 380px;
  background: #182027;
  border: 1px solid #26323c;
  border-radius: 14px;
  padding: 32px 28px 28px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45);
}
h1 { margin: 0 0 4px; font-size: 1.5rem; font-weight: 650; letter-spacing: -.01em; text-align: center; }
.sub { margin: 0 0 24px; color: #9aa8b4; text-align: center; font-size: .95rem; }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
label { font-size: .875rem; font-weight: 600; color: #c5d0d9; }
input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  font: inherit;
  font-size: 16px; /* no zoom on iOS */
  color: #f2f6f9;
  background: #0f1519;
  border: 1px solid #2f3d48;
  border-radius: 10px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input:focus { border-color: #3aa7a0; box-shadow: 0 0 0 3px rgba(58, 167, 160, .25); }
input[aria-invalid="true"] { border-color: #d5605a; }
.error {
  min-height: 1.4em;
  margin: 2px 0 14px;
  color: #ff8a80;
  font-size: .9rem;
  text-align: center;
}
button {
  width: 100%;
  height: 48px;
  font: inherit;
  font-weight: 650;
  color: #071312;
  background: #3fc1b7;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  transition: filter .15s, opacity .15s;
}
button:hover { filter: brightness(1.06); }
button:focus-visible { outline: 3px solid rgba(63, 193, 183, .45); outline-offset: 2px; }
button[disabled] { opacity: .65; cursor: progress; }
@media (max-width: 420px) {
  .card { padding: 26px 20px 22px; border-radius: 12px; }
}