/* Auth Page - Glassmorphism Style */

.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  position: relative;
  z-index: 1;
}

.auth-card {
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  padding: 48px 44px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-float);
  position: relative;
  animation: cardAppear 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes cardAppear {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--accent-gradient);
  color: white;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px var(--accent-glow);
  animation: pulse 2.5s ease-in-out infinite;
}

.promo-badge svg {
  flex-shrink: 0;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 4px 20px var(--accent-glow);
  }
  50% {
    box-shadow: 0 6px 28px var(--accent-glow), 0 0 24px var(--accent-glow);
  }
}

.auth-card h1 {
  text-align: center;
  font-size: 1.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 0.95rem;
  line-height: 1.6;
}

.auth-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 8px 0 18px;
}

.email-auth {
  display: none;
}

.social-login {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.9);
  color: #1f2937;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: all var(--transition-fast);
}

.google-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.google-btn svg {
  flex-shrink: 0;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0 24px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: "";
  height: 1px;
  background: rgba(255, 255, 255, 0.3);
  flex: 1;
}

.tab-bar {
  display: flex;
  margin-bottom: 28px;
  background: var(--glass-bg-light);
  padding: 5px;
  border-radius: var(--radius-pill);
}

.tab-bar button {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 12px 16px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font);
  border-radius: var(--radius-pill);
  transition: all var(--transition-normal);
}

.tab-bar button.active {
  color: white;
  background: var(--accent-gradient);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.tab-bar button:hover:not(.active) {
  color: var(--text-primary);
  background: var(--glass-bg);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 16px 20px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: none;
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font);
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-soft);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group input:focus {
  background: var(--glass-bg-strong);
  box-shadow: 
    var(--shadow-medium),
    0 0 0 2px rgba(168, 85, 247, 0.2);
}

.form-group.checkbox {
  margin-top: 10px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.checkbox-label input {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  border-radius: 4px;
  box-shadow: var(--shadow-soft);
}

.checkbox-label a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.checkbox-label a:hover {
  text-decoration: underline;
}

.password-strength {
  display: grid;
  gap: 8px;
  margin: 12px 0 8px;
}

.strength-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  overflow: hidden;
}

.strength-bar span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  transition: width var(--transition-normal);
}

.strength-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: left;
}

.btn {
  width: 100%;
  padding: 16px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition-normal);
  margin-top: 12px;
  box-shadow: 0 6px 24px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  50%, 100% { left: 100%; }
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 36px var(--accent-glow);
}

.btn:active:not(:disabled) {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn:disabled::after {
  animation: none;
}

.error-msg {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: 16px;
  text-align: center;
  min-height: 22px;
  font-weight: 500;
  padding: 10px;
  background: rgba(244, 63, 94, 0.1);
  border-radius: var(--radius-sm);
  display: none;
}

.error-msg:not(:empty) {
  display: block;
}

.notice {
  padding: 12px 14px;
  border-radius: var(--radius);
  margin: 12px 0 18px;
  font-size: 0.9rem;
  text-align: center;
  background: rgba(168, 85, 247, 0.12);
  color: var(--text-primary);
}

.notice.success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.notice.error {
  background: rgba(244, 63, 94, 0.15);
  color: var(--error);
}

.link-btn {
  width: 100%;
  margin-top: 10px;
  border: none;
  background: transparent;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}

.form-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 14px;
  line-height: 1.5;
}

#register-form {
  display: none;
}

/* Info box */
.info-box {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius);
  padding: 18px;
  margin-top: 28px;
  text-align: center;
}

.info-box p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin: 0;
  line-height: 1.6;
}

.info-box strong {
  color: var(--text-primary);
  font-weight: 600;
}

.info-box a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.info-box a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 480px) {
  .auth-card {
    padding: 36px 28px;
  }
  
  .auth-card h1 {
    font-size: 1.5rem;
  }
  
  .promo-badge {
    font-size: 0.8rem;
    padding: 8px 14px;
  }
}