*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0e0e10;
  --bg-card: #17181b;
  --line: #2a2c31;
  --text: #f5f5f7;
  --dim:  #a8abb3;
  --mut:  #6f737b;
  --accent: #4a78ff;
  --accent-2: #6b8eff;
  --danger: #ff5a5a;
}
html, body {
  height: 100%;
  background: radial-gradient(circle at 20% 0%, #1a1a1d 0%, #0e0e10 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  min-height: 100dvh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.card {
  width: min(420px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 36px 32px 32px;
  box-shadow: 0 20px 80px rgba(0,0,0,0.45);
  animation: pop 320ms cubic-bezier(.2,.7,.2,1);
}
@keyframes pop {
  from { opacity: 0; transform: translateY(10px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.brand {
  font-size: 26px; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 28px;
}
.brand .dot { color: var(--accent); }
h1 {
  font-size: 28px; font-weight: 600; letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.sub { color: var(--dim); font-size: 14px; margin-bottom: 24px; }
.field {
  display: flex; flex-direction: column; gap: 6px;
  margin-bottom: 18px;
}
.field .lbl {
  font-size: 12px; letter-spacing: 0.06em; color: var(--dim);
}
input {
  font: inherit;
  background: #0e0e10;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  outline: none;
  transition: border-color 200ms ease;
  width: 100%;
}
input:focus { border-color: var(--accent); }
.btn {
  width: 100%;
  padding: 14px 22px;
  border: 0; border-radius: 999px;
  background: var(--accent);
  color: #fff; font: inherit;
  font-weight: 600; letter-spacing: 0.08em;
  font-size: 13px; text-transform: uppercase;
  cursor: pointer;
  transition: background 200ms ease, transform 120ms ease;
}
.btn:hover { background: var(--accent-2); }
.btn:active { transform: scale(.98); }
.btn[disabled] { opacity: .6; cursor: progress; }
.err {
  margin-top: 14px;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}
@media (prefers-reduced-motion: reduce) {
  .card { animation: none; }
}