/* ============================================
   Auth CSS - Login/Register Screen
   Premium Dark Theme with Glassmorphism
   ============================================ */

/* Auth Container */
.auth-container {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  z-index: 9999;
  overflow-y: auto;
  padding: var(--space-4);
}

.auth-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.auth-bg::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  animation: authGlow1 8s ease-in-out infinite alternate;
}

.auth-bg::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
  bottom: -150px;
  left: -150px;
  animation: authGlow2 10s ease-in-out infinite alternate;
}

@keyframes authGlow1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-50px, 50px) scale(1.2); }
}

@keyframes authGlow2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(50px, -30px) scale(1.15); }
}

/* Auth Card */
.auth-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-xl);
  animation: authCardIn 500ms ease-out;
}

@keyframes authCardIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Auth Header */
.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.auth-logo .logo-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--accent-glow);
}

.auth-logo .logo-icon svg {
  width: 26px;
  height: 26px;
  color: white;
}

.auth-logo .logo-text {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* Auth Form */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.auth-field label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.auth-field input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 16px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.auth-field input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  outline: none;
}

.auth-field input::placeholder {
  color: var(--text-tertiary);
}

.auth-field .auth-error-field {
  border-color: var(--danger);
}

/* Auth Buttons */
.auth-submit {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 46px;
}

.auth-submit:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 28px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.auth-submit:active {
  transform: translateY(0);
}

.auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

/* Loading spinner */
.auth-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: authSpin 0.6s linear infinite;
}

@keyframes authSpin {
  to { transform: rotate(360deg); }
}

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* Google Button */
.auth-google {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--surface-2);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 46px;
}

.auth-google:hover {
  background: var(--surface-3);
  border-color: var(--border-strong);
}

.auth-google svg {
  width: 20px;
  height: 20px;
}

/* Error Message */
.auth-error {
  background: var(--danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--danger);
  display: none;
  animation: fadeInUp 200ms ease-out;
}

.auth-error.visible {
  display: block;
}

/* Auth Footer */
.auth-footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-primary);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

/* Auth Config Warning */
.auth-config-warning {
  background: var(--warning-bg);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--warning);
  line-height: 1.6;
}

.auth-config-warning code {
  background: rgba(0, 0, 0, 0.3);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

/* Logout Button in Sidebar */
.sidebar-logout {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  margin-top: var(--space-3);
  border: none;
  background: none;
  font-family: var(--font-family);
}

.sidebar-logout:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

.sidebar-logout svg {
  width: 18px;
  height: 18px;
}

/* Responsive */
@media (max-width: 480px) {
  .auth-card {
    padding: var(--space-6);
    border-radius: var(--radius-xl);
  }

  .auth-logo .logo-text {
    font-size: var(--font-size-xl);
  }

  .auth-title {
    font-size: var(--font-size-lg);
  }
}