.auth-shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2.5rem 1.5rem;
  background-color: var(--bs-body-bg);
  background-image:
    linear-gradient(125deg, rgba(10, 16, 36, 0.92) 0%, rgba(18, 27, 54, 0.78) 45%, rgba(var(--bs-primary-rgb), 0.16) 100%),
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.06), transparent 32%),
    radial-gradient(circle at 82% 8%, rgba(255, 255, 255, 0.05), transparent 26%),
    var(--qc-wallpaper, none);
  background-blend-mode: screen, screen, normal, normal;
  background-size: cover;
  background-position: center;
  color: var(--bs-body-color);
  overflow: hidden;
  font-family: "Inter", "Segoe UI", "SF Pro Text", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

.auth-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.05), transparent 32%),
    radial-gradient(circle at 80% 0%, rgba(255, 255, 255, 0.04), transparent 22%),
    linear-gradient(145deg, rgba(0, 0, 0, 0.42) 0%, rgba(0, 0, 0, 0.18) 45%, rgba(255, 255, 255, 0.05) 100%);
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.38;
}

.auth-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, var(--bs-primary) 0%, transparent 40%),
    radial-gradient(circle at 70% 60%, var(--qc-accent, #0ea5e9) 0%, transparent 38%);
  filter: blur(60px);
  opacity: 0.25;
  pointer-events: none;
}

.auth-card {
  position: relative;
  width: min(460px, 100%);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05)),
    var(--qc-surface-glass, rgba(13, 21, 42, 0.72));
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 20px;
  backdrop-filter: blur(24px);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  z-index: 1;
}

.auth-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, var(--bs-primary) 0%, var(--qc-accent, #0ea5e9) 100%);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  pointer-events: none;
  opacity: 0.55;
}

.auth-card__header {
  padding: 1.75rem 1.75rem 0.75rem;
  text-align: center;
}

.logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 16px;
  padding: 0.75rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-tagline {
  color: var(--bs-body-color);
  opacity: 0.85;
  font-size: 0.9rem;
}

.auth-card__body {
  padding: 0.5rem 1.75rem 1.75rem;
  color: var(--bs-body-color);
}

.auth-form h4,
.auth-form label,
.auth-form .form-text,
.auth-form small {
  color: var(--bs-body-color);
}

.auth-form .form-control,
.auth-form .form-floating > .form-control {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--bs-body-color);
  border-radius: 0.95rem;
  padding-block: 0.65rem;
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease, transform 150ms ease;
}

.auth-form .form-control::placeholder,
.auth-form textarea::placeholder {
  color: var(--bs-body-color);
  opacity: 0.55;
}

.auth-form .form-control:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem var(--qc-focus, rgba(139, 92, 246, 0.45));
  background: rgba(255, 255, 255, 0.12);
  color: var(--bs-body-color);
  transform: translateY(-1px);
}

.auth-form .form-floating > label {
  color: var(--bs-body-color);
  opacity: 0.8;
}

.auth-form .form-check-input {
  width: 1.1rem;
  height: 1.1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.auth-form .form-check-input:focus {
  box-shadow: 0 0 0 0.18rem var(--qc-focus, rgba(139, 92, 246, 0.45));
}

.auth-form .form-check-input:checked {
  background: var(--qc-gradient, linear-gradient(135deg, rgba(139, 92, 246, 0.95) 0%, rgba(14, 165, 233, 0.9) 100%));
  border-color: transparent;
}

.auth-form .form-check-label {
  color: var(--bs-body-color);
  font-weight: 600;
}

.auth-form .btn {
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease, filter 160ms ease;
}

.auth-form .btn:focus,
.auth-form .btn:active:focus,
.auth-form .form-control:focus,
.auth-form .form-check-input:focus {
  outline: none;
  box-shadow: 0 0 0 0.18rem var(--qc-focus, rgba(139, 92, 246, 0.45));
}

.auth-form .btn-primary {
  color: #0b1020;
  background: var(--qc-gradient, linear-gradient(135deg, rgba(139, 92, 246, 0.95) 0%, rgba(14, 165, 233, 0.9) 100%));
  border: none;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

.auth-form .btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.auth-form .btn-outline-secondary {
  color: var(--bs-body-color);
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.04);
}

.auth-form .btn-outline-secondary:hover {
  border-color: var(--bs-primary);
  color: var(--bs-body-color);
  background: rgba(255, 255, 255, 0.08);
}

.auth-card hr {
  border-color: rgba(255, 255, 255, 0.18);
  opacity: 0.4;
}

@media (max-width: 576px) {
  .auth-card {
    width: 100%;
  }

  .auth-shell {
    padding: 1.5rem 1.25rem;
  }
}