/* =========================================================
   AUTH PAGES
   ========================================================= */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 500px 400px at 30% 30%, rgba(var(--accent-gold-rgb), 0.06), transparent),
    radial-gradient(ellipse 400px 350px at 70% 70%, rgba(var(--accent-gold-rgb), 0.04), transparent);
  pointer-events: none;
}

/* Auth Card */
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(var(--accent-gold-rgb), 0.04);
  position: relative;
  z-index: 1;
  animation: authCardIn 0.5s var(--ease-spring) both;
}

@keyframes authCardIn {
  0% {
    opacity: 0;
    transform: translateY(40px) scale(0.85);
  }
  50% {
    opacity: 1;
    transform: translateY(-8px) scale(1.02);
  }
  75% {
    transform: translateY(3px) scale(0.99);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 10%, var(--accent-gold) 50%, transparent 90%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0.5;
}

/* Header */
.auth-header {
  text-align: center;
  margin-bottom: 36px;
}

.auth-logo {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--accent-gold), rgba(var(--accent-gold-rgb), 0.9));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--bg-primary);
  user-select: none;
  box-shadow: 0 4px 16px rgba(var(--accent-gold-rgb), 0.3);
  transition: transform 0.4s var(--ease-spring), box-shadow 0.3s var(--ease-spring-gentle);
  will-change: transform;
}

.auth-logo:hover {
  transform: scale(1.15) rotate(-5deg);
  box-shadow: 0 8px 28px rgba(var(--accent-gold-rgb), 0.45);
}

.auth-header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.auth-header p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

/* Form */
.auth-form .form-group {
  margin-bottom: 18px;
}

.auth-form .btn {
  width: 100%;
  margin-top: 12px;
  padding: 12px 24px;
  font-size: 0.9rem;
  min-height: 44px;
  transition: background 0.2s ease, transform 0.35s var(--ease-spring-bounce), box-shadow 0.35s var(--ease-spring-bounce);
}

/* Password Strength */
.password-strength {
  height: 4px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  margin-top: 10px;
  overflow: hidden;
}

.password-strength-bar {
  height: 100%;
  border-radius: var(--radius-sm);
  transition: width 0.4s var(--ease-spring), background 0.3s ease;
  width: 0;
}

.password-strength-weak {
  background: linear-gradient(90deg, var(--accent-red), var(--accent-red-light));
  width: 33%;
}

.password-strength-medium {
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light));
  width: 66%;
}

.password-strength-strong {
  background: linear-gradient(90deg, var(--accent-green), var(--accent-green-light));
  width: 100%;
}

/* Footer */
.auth-footer {
  text-align: center;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.auth-footer a {
  color: var(--accent-gold-light);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease, background 0.15s ease, transform 0.3s var(--ease-spring);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  margin: -2px -4px;
}

.auth-footer a:hover,
.auth-footer a:focus-visible {
  color: var(--accent-gold);
  text-decoration: underline;
  background: rgba(var(--accent-gold-rgb), 0.08);
  outline: none;
  transform: translateY(-3px);
}

.auth-policies {
  text-align: center;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.auth-policies a {
  color: var(--accent-gold-light);
  text-decoration: none;
  transition: var(--transition-fast);
}

.auth-policies a:hover {
  color: var(--accent-gold);
  text-decoration: underline;
}

.auth-form .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Policy Checkbox */
.auth-form .form-check {
  margin: 16px 0 6px;
}

.auth-form .form-check-label {
  font-size: 0.78rem;
}

/* Messages */
.auth-error {
  background: rgba(var(--accent-red-rgb), 0.12);
  border: 1px solid rgba(var(--accent-red-rgb), 0.25);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  color: var(--accent-red);
  font-size: 0.8rem;
  text-align: center;
  animation: shakeSpring 0.5s var(--ease-spring);
}

@keyframes shakeSpring {
  0%, 100% { transform: translateX(0) rotate(0); }
  15% { transform: translateX(-10px) rotate(-2deg); }
  30% { transform: translateX(9px) rotate(1.5deg); }
  45% { transform: translateX(-7px) rotate(-1deg); }
  60% { transform: translateX(5px) rotate(0.5deg); }
  75% { transform: translateX(-3px) rotate(-0.3deg); }
  90% { transform: translateX(1px) rotate(0.1deg); }
}

.auth-success {
  background: rgba(var(--accent-green-rgb), 0.12);
  border: 1px solid rgba(var(--accent-green-rgb), 0.25);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  color: var(--accent-green);
  font-size: 0.8rem;
  text-align: center;
  animation: authSuccessIn 0.4s var(--ease-spring) both;
}

@keyframes authSuccessIn {
  0% {
    opacity: 0;
    transform: translateY(-15px) scale(0.9);
  }
  50% {
    opacity: 1;
    transform: translateY(4px) scale(1.02);
  }
  75% {
    transform: translateY(-1px) scale(0.99);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-6px);
  }
  75% {
    transform: translateX(6px);
  }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 480px) {
  .auth-card {
    padding: 32px 24px;
    border-radius: var(--radius-md);
  }

  .auth-header h1 {
    font-size: 1.4rem;
  }

  .auth-logo {
    width: 48px;
    height: 48px;
    font-size: 1.3rem;
  }

  .auth-page {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-card {
    animation: none;
    transform: none !important;
  }

  .auth-error {
    animation: none;
  }

  .auth-success {
    animation: none;
    transform: none !important;
  }

  .auth-logo:hover {
    transform: none !important;
  }

  .auth-footer a:hover {
    transform: none !important;
  }

  .auth-form .btn:hover {
    transform: none !important;
  }
}