/*
 * Ranges atlas gate login — parchment institute theme (matches site landing).
 * Touch targets: min 44×44 CSS px (WCAG 2.2 / platform guidance).
 */
.atlas-login {
  --login-accent: var(--color-accent);
  --login-accent-hover: var(--color-accent-hover);
}

.atlas-login html,
.atlas-login body {
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 100%;
}

.atlas-login body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-parchment);
}

.atlas-login .login-page {
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  box-sizing: border-box;
}

.atlas-login .login-shell {
  width: 100%;
  max-width: 28rem;
}

.atlas-login .login-brand {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.atlas-login .login-logo {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-md);
  display: block;
  object-fit: contain;
}

.atlas-login .login-eyebrow {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.atlas-login .login-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-ink);
}

.atlas-login .login-sub {
  margin: var(--space-sm) 0 0;
  font-size: 1rem;
  color: var(--color-slate);
}

.atlas-login .login-card {
  width: 100%;
  margin: 0;
  padding: var(--space-lg);
  text-align: left;
  background: var(--color-cream);
  border: 1px solid color-mix(in srgb, var(--color-slate) 35%, transparent);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px color-mix(in srgb, var(--color-ink) 8%, transparent);
}

.atlas-login .login-card label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-slate);
}

.atlas-login .login-card input {
  width: 100%;
  min-height: 2.75rem;
  margin-bottom: var(--space-md);
  padding: 0.65rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--color-slate) 40%, transparent);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-ink);
  font-family: var(--font-ui);
  font-size: 1rem;
  box-sizing: border-box;
}

.atlas-login .login-card input:focus {
  outline: 2px solid var(--login-accent);
  outline-offset: 2px;
  border-color: var(--login-accent);
}

/* Primary control: 44px min height (touch / WCAG target size guidance) */
.atlas-login .login-card button[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 2.75rem;
  min-width: 2.75rem;
  margin-top: var(--space-sm);
  padding: 0.75rem 1.25rem;
  border: none;
  border-radius: var(--radius-md);
  background: var(--login-accent);
  color: var(--color-cream);
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.35s ease;
}

.atlas-login .login-card button[type="submit"]:hover {
  background: var(--login-accent-hover);
}

.atlas-login .login-card button[type="submit"]:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

.atlas-login .login-card .error {
  margin: var(--space-sm) 0 0;
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: #9b2226;
}

.atlas-login .login-card .back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  margin-top: var(--space-md);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--color-slate);
  text-decoration: none;
}

.atlas-login .login-card .back:hover {
  color: var(--color-ink);
}

.atlas-login .login-foot {
  margin-top: var(--space-md);
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--color-slate);
}

.atlas-login .login-foot a {
  color: var(--login-accent);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  .atlas-login .login-card button[type="submit"] {
    transition: none;
  }
}