/* ============================================
   UNIFIED BUTTONS SYSTEM FOR ARTWORKS DIGITAL
   ============================================ */

/* Color Palette */
:root {
  --btn-primary-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  --btn-primary-gradient-hover: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  
  --btn-secondary-gradient: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
  --btn-secondary-gradient-hover: linear-gradient(135deg, #0891B2 0%, #2563EB 100%);
  
  --btn-featured-gradient: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
  --btn-featured-gradient-hover: linear-gradient(135deg, #2563EB 0%, #0891B2 100%);
  
  --btn-premium-gradient: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
  --btn-premium-gradient-hover: linear-gradient(135deg, #7C3AED 0%, #9333EA 100%);
  
  --btn-secondary-border-color: rgba(59, 130, 246, 0.35);
  --btn-secondary-border-color-hover: #3B82F6;
  --btn-secondary-bg-hover: rgba(59, 130, 246, 0.1);
}

/* ============================================
   1. PRIMARY CTA BUTTONS
   Usage: Main call-to-action buttons
   Classes: .btn-cta, .btn-hero-primary, .cta-button
   ============================================ */

.btn-cta,
.btn-hero-primary,
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--btn-primary-gradient);
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
  border: none;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35), 0 0 0 0 rgba(59, 130, 246, 0);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.4s ease,
              background 0.3s ease;
}

/* Shine effect on hover */
.btn-cta::before,
.btn-hero-primary::before,
.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}

.btn-cta:hover,
.btn-hero-primary:hover,
.cta-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45), 0 0 20px rgba(139, 92, 246, 0.2);
}

.btn-cta:hover::before,
.btn-hero-primary:hover::before,
.cta-button:hover::before {
  left: 100%;
}

.btn-cta:active,
.btn-hero-primary:active,
.cta-button:active {
  transform: translateY(-1px) scale(0.99);
}

.btn-cta:disabled,
.btn-hero-primary:disabled,
.cta-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   2. SECONDARY BUTTONS
   Usage: Secondary actions, optional choices
   Classes: .btn-hero-secondary, .btn-secondary
   ============================================ */

.btn-hero-secondary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 36px;
  background: transparent;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  border: 2px solid var(--btn-secondary-border-color);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.btn-hero-secondary:hover,
.btn-secondary:hover {
  border-color: var(--btn-secondary-border-color-hover);
  color: white;
  background: var(--btn-secondary-bg-hover);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
  transform: translateY(-2px);
}

.btn-hero-secondary:active,
.btn-secondary:active {
  transform: translateY(0);
}

.btn-hero-secondary:disabled,
.btn-secondary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================
   3. PRICING BUTTONS
   Usage: Pricing cards, special offer CTAs
   Classes: .btn-pricing, .btn-pricing-featured, .btn-pricing-premium
   ============================================ */

.btn-pricing {
  display: block;
  width: 100%;
  padding: 20px;
  background: var(--btn-primary-gradient);
  color: white;
  text-decoration: none;
  text-align: center;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  border: none;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.4s ease;
}

.btn-pricing::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transition: left 0.6s ease;
}

.btn-pricing:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 10px 35px rgba(59, 130, 246, 0.45), 0 0 25px rgba(139, 92, 246, 0.2);
}

.btn-pricing:hover::before {
  left: 100%;
}

.btn-pricing:active {
  transform: translateY(-1px) scale(0.99);
}

/* Featured pricing button (Middle card) */
.btn-pricing-featured {
  background: var(--btn-featured-gradient);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

.btn-pricing-featured:hover {
  box-shadow: 0 10px 35px rgba(6, 182, 212, 0.45), 0 0 25px rgba(59, 130, 246, 0.2);
}

/* Premium pricing button */
.btn-pricing-premium {
  background: var(--btn-premium-gradient);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35);
}

.btn-pricing-premium:hover {
  box-shadow: 0 10px 35px rgba(139, 92, 246, 0.45), 0 0 25px rgba(167, 139, 250, 0.2);
}

/* ============================================
   4. BASIC BUTTONS (Secondary actions)
   Usage: Add image, submit forms, next/prev
   Classes: .btn-basic, .btn-add-image, .btn-submit, .btn-add-artwork
   ============================================ */

.btn-basic,
.btn-add-image,
.btn-submit,
.btn-add-artwork,
.btn-next,
.btn-prev {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--primary);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-basic:hover,
.btn-add-image:hover,
.btn-submit:hover,
.btn-add-artwork:hover,
.btn-next:hover,
.btn-prev:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-basic:active,
.btn-add-image:active,
.btn-submit:active,
.btn-add-artwork:active,
.btn-next:active,
.btn-prev:active {
  transform: translateY(0);
}

.btn-basic:disabled,
.btn-add-image:disabled,
.btn-submit:disabled,
.btn-add-artwork:disabled,
.btn-next:disabled,
.btn-prev:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   5. OUTLINE BUTTONS (Alternative actions)
   Usage: Cancel, secondary forms, dismiss
   Classes: .btn-outline, .btn-secondary-outline
   ============================================ */

.btn-outline,
.btn-secondary-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--primary);
  font-weight: 600;
  font-size: 1rem;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-outline:hover,
.btn-secondary-outline:hover {
  background: rgba(59, 130, 246, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-outline:active,
.btn-secondary-outline:active {
  transform: translateY(0);
}

/* ============================================
   6. TAB BUTTONS & TOGGLES
   Usage: Tab navigation, toggle sections
   Classes: .tab-btn, .toggle-btn
   ============================================ */

.tab-btn,
.toggle-btn {
  padding: 10px 20px;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.tab-btn:hover,
.toggle-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active,
.toggle-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ============================================
   7. TEXT LINKS & NAVIGATION BUTTONS
   Usage: Inline links, navigation
   Classes: .btn-link, .nav-link, .mobile-link
   ============================================ */

.btn-link,
.nav-link,
.mobile-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
}

.btn-link::after,
.nav-link::after,
.mobile-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.btn-link:hover,
.nav-link:hover,
.mobile-link:hover {
  color: var(--primary);
}

.btn-link:hover::after,
.nav-link:hover::after,
.mobile-link:hover::after {
  width: 100%;
}

/* Navigation CTA Button (special) */
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--btn-primary-gradient);
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
}

.btn-nav-cta:active {
  transform: translateY(0);
}

/* ============================================
   8. ICON BUTTONS
   Usage: Close buttons, icons with actions
   Classes: .btn-icon, .remove-btn, .btn-close
   ============================================ */

.btn-icon,
.remove-btn,
.btn-close,
.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  color: var(--text-primary);
  font-size: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-icon:hover,
.remove-btn:hover,
.btn-close:hover,
.modal-close:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-icon:active,
.remove-btn:active,
.btn-close:active,
.modal-close:active {
  transform: scale(0.95);
}

/* ============================================
   9. FORM BUTTONS (Special cases)
   Usage: Form submission with states
   Classes: .btn-submit-form, .btn-submit-modal
   ============================================ */

.btn-submit-form,
.btn-submit-modal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--btn-primary-gradient);
  color: white;
  font-weight: 700;
  font-size: 1.05rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-submit-form:hover:not(:disabled),
.btn-submit-modal:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.35);
}

.btn-submit-form:disabled,
.btn-submit-modal:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-submit-form.loading,
.btn-submit-modal.loading {
  pointer-events: none;
  opacity: 0.8;
}

/* ============================================
   10. SPECIAL BUTTONS (Blog, etc.)
   Usage: Blog CTAs, special sections
   Classes: .btn-blog, .btn-read-more, .cta-btn
   ============================================ */

.btn-blog,
.btn-read-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-blog:hover,
.btn-read-more:hover {
  background: var(--primary);
  color: white;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  /* Ensure buttons are touch-friendly (48px min) */
  .btn-cta,
  .btn-hero-primary,
  .cta-button,
  .btn-hero-secondary,
  .btn-secondary,
  .btn-nav-cta,
  .btn-submit-form,
  .btn-submit-modal {
    padding: 14px 28px;
    min-height: 48px;
    font-size: 1rem;
  }

  .btn-basic,
  .btn-add-image,
  .btn-submit,
  .btn-add-artwork,
  .btn-next,
  .btn-prev {
    padding: 12px 20px;
    min-height: 44px;
  }

  .btn-pricing {
    padding: 18px;
    font-size: 1.05rem;
  }

  /* Stack pricing buttons on small screens if needed */
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .btn-pricing {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .btn-cta,
  .btn-hero-primary,
  .cta-button,
  .btn-hero-secondary,
  .btn-secondary {
    padding: 12px 20px;
    font-size: 0.95rem;
  }

  .tab-btn,
  .toggle-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  /* Mobile CTA buttons should still be visible */
  .btn-nav-cta {
    padding: 10px 20px;
    font-size: 0.95rem;
  }
}

/* ============================================
   ACCESSIBILITY & FOCUS STATES
   ============================================ */

/* Focus visible for all buttons */
.btn-cta:focus-visible,
.btn-hero-primary:focus-visible,
.cta-button:focus-visible,
.btn-hero-secondary:focus-visible,
.btn-secondary:focus-visible,
.btn-pricing:focus-visible,
.btn-pricing-featured:focus-visible,
.btn-pricing-premium:focus-visible,
.btn-basic:focus-visible,
.btn-add-image:focus-visible,
.btn-submit:focus-visible,
.btn-add-artwork:focus-visible,
.btn-next:focus-visible,
.btn-prev:focus-visible,
.btn-outline:focus-visible,
.btn-secondary-outline:focus-visible,
.tab-btn:focus-visible,
.toggle-btn:focus-visible,
.btn-link:focus-visible,
.nav-link:focus-visible,
.mobile-link:focus-visible,
.btn-nav-cta:focus-visible,
.btn-icon:focus-visible,
.remove-btn:focus-visible,
.btn-close:focus-visible,
.modal-close:focus-visible,
.btn-submit-form:focus-visible,
.btn-submit-modal:focus-visible,
.btn-blog:focus-visible,
.btn-read-more:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .btn-cta,
  .btn-hero-primary,
  .cta-button,
  .btn-pricing,
  .btn-submit-form,
  .btn-submit-modal {
    box-shadow: 0 0 0 2px var(--bg-primary), 
                0 0 0 4px var(--primary);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .btn-cta,
  .btn-hero-primary,
  .cta-button,
  .btn-hero-secondary,
  .btn-secondary,
  .btn-pricing,
  .btn-pricing-featured,
  .btn-pricing-premium,
  .btn-basic,
  .btn-add-image,
  .btn-submit,
  .btn-add-artwork,
  .btn-next,
  .btn-prev,
  .btn-outline,
  .btn-secondary-outline,
  .tab-btn,
  .toggle-btn,
  .btn-link,
  .nav-link,
  .mobile-link,
  .btn-nav-cta,
  .btn-icon,
  .remove-btn,
  .btn-close,
  .modal-close,
  .btn-submit-form,
  .btn-submit-modal,
  .btn-blog,
  .btn-read-more {
    transition: none;
  }
}