/* 
  SINCERE AD - Responsive Stylesheet
*/

/* Tablet (Max 1024px) */
@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Tablet Portrait (Max 768px) */
@media (max-width: 768px) {
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .desktop-nav, .header-actions .btn {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .site-header {
    height: var(--header-height-mobile);
  }
  
  .logo-img {
    height: 40px;
  }

  /* Off-Canvas Mobile Menu */
  .mobile-nav-wrapper {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .mobile-nav-wrapper.open {
    opacity: 1;
    visibility: visible;
  }

  .mobile-nav {
    position: absolute;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background-color: var(--color-white);
    padding: var(--space-32) var(--space-24);
    transition: right var(--transition-normal);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
  }

  .mobile-nav-wrapper.open .mobile-nav {
    right: 0;
  }

  .mobile-nav-close {
    align-self: flex-end;
    font-size: 24px;
    color: var(--color-charcoal);
    margin-bottom: var(--space-32);
  }

  .mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
  }

  .mobile-nav-link {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-charcoal);
    display: block;
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-gray-100);
  }

  /* Mobile Accordion */
  .mobile-nav-has-children .mobile-nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .mobile-nav-dropdown {
    display: none;
    padding-left: var(--space-16);
    margin-top: var(--space-8);
  }

  .mobile-nav-dropdown.open {
    display: block;
  }

  .mobile-nav-dropdown a {
    display: block;
    padding: var(--space-8) 0;
    font-size: 15px;
    color: var(--color-text-muted);
  }
}

/* Mobile Landscape (Max 640px) */
@media (max-width: 640px) {
  .grid-cols-2 {
    grid-template-columns: 1fr;
  }
}

/* Mobile Portrait (Max 480px) */
@media (max-width: 480px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-32);
  }

  .section-padding {
    padding: var(--space-48) 0;
  }

  .section-padding-lg {
    padding: var(--space-80) 0;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-16);
    text-align: center;
  }

  .chatbot-window {
    width: calc(100vw - 32px);
    right: 16px;
    bottom: 80px;
  }

  .chatbot-widget {
    bottom: 16px;
    right: 16px;
  }

  .chatbot-button {
    width: 50px;
    height: 50px;
  }

  /* Floating Mobile Action Bar */
  body {
    padding-bottom: 70px; /* Space for action bar */
  }

  .mobile-action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    display: flex;
    z-index: 999;
    height: 60px;
  }

  .action-bar-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-charcoal);
    border-right: 1px solid var(--color-gray-200);
  }

  .action-bar-btn:last-child {
    border-right: none;
  }

  .action-bar-btn.primary {
    background-color: var(--color-primary);
    color: var(--color-white);
  }
}