/* ═══════════════════════════════════════════════════════════════════════
   AUTH PAGES — Premium Design v2
   ═══════════════════════════════════════════════════════════════════════ */

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* ── Sidebar ── */
.auth-side {
  background: var(--ink-900);
  color: var(--paper-100);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}
.auth-side::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(246,243,234,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,243,234,0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 30% 30%, black, transparent 70%);
}
/* Gradient accent orbs */
.auth-side::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(194,149,43,0.1) 0%, transparent 60%);
  pointer-events: none;
  filter: blur(40px);
}

.auth-side > * { position: relative; z-index: 1; }
.auth-side .brand { color: var(--paper-50); }
.auth-side .brand-mark { background: rgba(252,251,247,0.12); border: none; }
.auth-side .brand-mark::after { border-color: var(--brass-500); }

.auth-pitch h1 {
  color: var(--paper-50);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  max-width: 12ch;
  margin-top: var(--space-8);
  letter-spacing: -0.02em;
}
.auth-pitch p { color: rgba(246,243,234,0.65); max-width: 36ch; }

/* Animated side stats */
.auth-side-stats {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(246,243,234,0.1);
}
.auth-stat { display: flex; flex-direction: column; }
.auth-stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.auth-stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(246,243,234,0.45);
}

.auth-quote {
  border-left: 2px solid var(--brass-500);
  padding-left: var(--space-4);
  font-family: var(--font-body);
  font-size: 1.02rem;
  color: rgba(246,243,234,0.85);
  font-style: italic;
  line-height: 1.6;
}
.auth-quote cite {
  display: block;
  margin-top: var(--space-3);
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: rgba(246,243,234,0.5);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Main Form Area ── */
.auth-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--paper-100);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  animation: authCardIn 0.5s var(--ease-spring) both;
}
@keyframes authCardIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.auth-card .mobile-brand { display: none; margin-bottom: var(--space-6); }
.auth-card h2 {
  font-size: 1.7rem;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}
.auth-card .auth-sub { color: var(--ink-700); margin-bottom: var(--space-6); }

/* ── Form Fields ── */
.field { margin-bottom: var(--space-5); }
.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink-900);
}
.field .hint { font-size: 0.76rem; color: var(--ink-700); margin-top: 6px; }
.field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  background: var(--paper-50);
  font-size: 0.95rem;
  color: var(--ink-900);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.field input:focus {
  border-color: var(--brass-500);
  box-shadow: 0 0 0 3px rgba(194,149,43,0.12);
  outline: none;
}
.field.has-error input { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: 0.78rem; margin-top: 6px; display: none; }
.field.has-error .field-error { display: block; }

.password-row { position: relative; }
.toggle-visibility {
  position: absolute;
  right: 10px; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--ink-700);
  padding: 4px 6px;
  cursor: pointer;
  transition: color 0.15s ease;
}
.toggle-visibility:hover { color: var(--ink-900); }

/* Password Strength */
.password-strength {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  min-height: 20px;
}
.strength-bar {
  flex: 1; height: 4px;
  background: var(--paper-200);
  border-radius: 2px; overflow: hidden;
}
.strength-fill {
  height: 100%; width: 0;
  border-radius: 2px;
  transition: width 0.35s var(--ease-spring), background 0.35s ease;
}
.strength-fill.weak   { width: 25%; background: var(--danger); }
.strength-fill.fair   { width: 50%; background: var(--brass-500); }
.strength-fill.good   { width: 75%; background: #5fa366; }
.strength-fill.strong { width: 100%; background: var(--success); }
.strength-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-700);
  min-width: 48px;
}

/* Form Banner */
.form-banner {
  display: none;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  margin-bottom: var(--space-5);
}
.form-banner.show { display: flex; }
.form-banner.error   { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(163,57,43,0.2); }
.form-banner.success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(47,107,79,0.2); }

/* Divider */
.auth-divider {
  display: flex; align-items: center; gap: 12px;
  color: var(--ink-700); font-size: 0.76rem;
  margin: var(--space-5) 0;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--rule);
}

/* Social Auth */
.social-auth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: var(--space-5);
}
.btn-social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--paper-50);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-900);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s var(--ease-spring), box-shadow 0.2s ease;
  cursor: pointer;
}
.btn-social:hover {
  background: var(--paper-200);
  border-color: var(--ink-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xs);
}
.btn-social svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn-social-full { grid-column: 1 / -1; }

.auth-switch { text-align: center; font-size: 0.9rem; color: var(--ink-700); margin-top: var(--space-5); }
.auth-switch a {
  color: var(--ink-900); font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--brass-500);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease;
}
.auth-switch a:hover { text-decoration-color: var(--brass-400); }

.demo-fill { text-align: center; margin-top: var(--space-4); }
.demo-fill button {
  background: none; border: none;
  font-family: var(--font-mono); font-size: 0.76rem;
  color: var(--brass-600);
  text-decoration: underline;
  cursor: pointer;
  transition: color 0.15s ease;
}
.demo-fill button:hover { color: var(--brass-500); }

/* ── Full-width social grid (one button per row) ── */
.social-auth-grid--full {
  grid-template-columns: 1fr;
  gap: 8px;
}
.social-auth-grid--full .btn-social {
  justify-content: flex-start;
  padding: 12px 16px;
  font-size: 0.88rem;
}

/* Terms & Privacy */
.auth-terms {
  text-align: center;
  font-size: 0.76rem;
  color: var(--ink-600);
  margin-top: var(--space-3);
  line-height: 1.5;
}
.auth-terms a {
  color: var(--ink-800);
  text-decoration: underline;
  text-decoration-color: var(--rule-strong);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.15s ease;
}
.auth-terms a:hover { text-decoration-color: var(--brass-500); }

/* Spinner inside buttons */
.spinner {
  display: inline-block;
  border: 2px solid var(--rule);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ── */
@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-side { display: none; }
  .auth-card .mobile-brand { display: flex; }
}