:root {
  color-scheme: dark;
  --bg: #050b19;
  --panel: #0d1c36;
  --panel-2: #132849;
  --line: rgba(135, 164, 225, .22);
  --text: #f7f9ff;
  --muted: #9aafd3;
  --blue: #5f7df7;
  --cyan: #2f91ff;
  --danger: #ff8a9e;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  display: grid;
  place-items: center;
  padding: 28px 16px;
  background:
    radial-gradient(circle at 18% 15%, rgba(50, 105, 255, .25), transparent 28rem),
    radial-gradient(circle at 82% 80%, rgba(119, 93, 255, .18), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: inherit; text-decoration: none; }

.auth-shell { width: min(100%, 460px); }

.auth-brand {
  display: flex;
  align-items: center;
  gap: 13px;
  width: max-content;
  margin: 0 auto 22px;
}

.auth-brand img {
  border-radius: 16px;
  box-shadow: 0 12px 36px rgba(45, 96, 255, .32);
}

.auth-brand span { display: grid; gap: 2px; }
.auth-brand strong { font-size: 17px; }
.auth-brand small { color: var(--muted); font-size: 12px; }

.auth-card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    radial-gradient(circle at 100% 0, rgba(47, 145, 255, .18), transparent 18rem),
    linear-gradient(145deg, rgba(18, 40, 77, .98), rgba(7, 18, 38, .98));
  box-shadow: 0 30px 90px rgba(0, 0, 0, .42);
}

.auth-card.compact { text-align: center; }

.auth-heading { margin-bottom: 26px; }

.auth-badge {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 7px 10px;
  border: 1px solid rgba(95, 125, 247, .42);
  border-radius: 999px;
  color: #a9bbff;
  background: rgba(95, 125, 247, .12);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.auth-badge.warning {
  color: #ffd1d8;
  border-color: rgba(255, 138, 158, .35);
  background: rgba(255, 138, 158, .1);
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 8vw, 42px);
  line-height: 1.02;
  letter-spacing: -.04em;
}

.auth-heading p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.auth-form { display: grid; gap: 10px; }

.auth-form label {
  margin-top: 6px;
  color: #cbd7f5;
  font-size: 13px;
  font-weight: 700;
}

.auth-form input {
  width: 100%;
  min-height: 52px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: none;
  background: rgba(5, 14, 31, .78);
  color: var(--text);
  font: inherit;
  transition: border-color .16s, box-shadow .16s;
}

.auth-form input:focus {
  border-color: rgba(95, 125, 247, .85);
  box-shadow: 0 0 0 4px rgba(95, 125, 247, .13);
}

.auth-form button,
.auth-action {
  min-height: 52px;
  display: inline-grid;
  place-items: center;
  margin-top: 10px;
  padding: 0 20px;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  color: white;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 18px 40px rgba(50, 105, 255, .28);
  font: inherit;
  font-weight: 800;
}

.auth-error {
  padding: 12px 14px;
  border: 1px solid rgba(255, 138, 158, .34);
  border-radius: 12px;
  color: #ffd5dc;
  background: rgba(255, 86, 116, .09);
  font-size: 13px;
}

.auth-error p, .field-error { margin: 0; }
.field-error { color: var(--danger); font-size: 12px; }

.auth-back {
  display: block;
  margin-top: 20px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.auth-back:hover { color: var(--text); }

.auth-note {
  margin: 17px 0 0;
  color: #687c9e;
  text-align: center;
  font-size: 11px;
}

@media (max-width: 520px) {
  body { padding: 18px 12px; }
  .auth-card { padding: 25px 20px; border-radius: 22px; }
}