/* ==========================================================================
   Pantalla de login
   ========================================================================== */

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  background: var(--bg-app);
}

.auth-visual {
  position: relative;
  background: var(--gradient-brand);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--sp-12);
  color: #fff;
  overflow: hidden;
}
/* Textura de firma: grid punteado tipo "papel de inventario", más el brillo
   radial suave en las esquinas para dar profundidad sin caer en el blob genérico */
.auth-visual::before {
  content: "";
  position: absolute; inset: 0;
  background-image: var(--dot-grid);
  background-size: var(--grid-dot-size) var(--grid-dot-size);
  mask-image: radial-gradient(circle at 30% 30%, black 0%, transparent 70%);
  opacity: .55;
}
.auth-visual::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 15% 15%, rgba(255,255,255,.22), transparent 42%),
              radial-gradient(circle at 85% 85%, rgba(255,255,255,.14), transparent 48%);
}
.auth-visual .brand { display: flex; align-items: center; gap: var(--sp-3); position: relative; z-index: 1; }
.auth-visual .brand .logo-mark {
  width: 46px; height: 46px; border-radius: var(--radius-md);
  background: rgba(255,255,255,.2); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.3);
  display: grid; place-items: center; font-weight: 800; font-family: var(--font-display);
}
.auth-visual .brand strong { font-family: var(--font-display); font-size: var(--fs-md); letter-spacing: -.01em; }

.auth-visual h1 {
  font-size: 2.5rem; line-height: 1.18; max-width: 460px; position: relative; z-index: 1;
  letter-spacing: -.02em;
}
.auth-visual p { opacity: .9; max-width: 400px; margin-top: var(--sp-4); position: relative; z-index: 1; font-size: var(--fs-md); line-height: 1.6; }

.auth-visual .stat-strip { display: flex; gap: var(--sp-8); position: relative; z-index: 1; margin-top: var(--sp-8); }
.auth-visual .stat-strip .item strong {
  display: block; font-family: var(--font-mono); font-size: var(--fs-xl); font-variant-numeric: tabular-nums;
}
.auth-visual .stat-strip .item span { font-size: var(--fs-xs); opacity: .8; text-transform: uppercase; letter-spacing: .06em; }

.auth-visual .footnote { font-size: var(--fs-xs); opacity: .75; position: relative; z-index: 1; }

.auth-form-wrap {
  display: flex; align-items: center; justify-content: center;
  padding: var(--sp-6);
  position: relative;
}
.auth-form {
  width: 100%; max-width: 400px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-2);
}
.auth-form h2 { font-size: var(--fs-xl); margin-bottom: var(--sp-2); font-family: var(--font-display); }
.auth-form .subtitle { color: var(--text-muted); font-size: var(--fs-sm); margin-bottom: var(--sp-6); }
.auth-form .btn { width: 100%; margin-top: var(--sp-2); }
.auth-alert {
  background: var(--danger-bg); color: var(--danger);
  border-radius: var(--radius-md); padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-sm); margin-bottom: var(--sp-4);
  display: flex; align-items: center; gap: var(--sp-2);
}
.auth-theme-toggle { position: absolute; top: var(--sp-5); right: var(--sp-5); }

@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-form { box-shadow: none; border: none; padding: var(--sp-4); }
}