/* ============================================
   NutriMove — Responsive Styles
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 0px;
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }

  .section {
    padding: var(--space-16) 0;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Sidebar mobile */
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
    z-index: var(--z-overlay);
    transition: transform var(--transition-base);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: calc(var(--z-overlay) - 1);
  }

  .sidebar.open ~ .sidebar-overlay {
    display: block;
  }

  .main-content {
    margin-left: 0 !important;
  }

  .mobile-menu-btn {
    display: flex !important;
  }
}

/* Mobile */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .btn-lg {
    width: 100%;
  }

  /* Landing nav mobile */
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    z-index: var(--z-overlay);
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: flex !important;
  }

  /* Dashboard stats */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* Onboarding */
  .onboarding-card {
    padding: var(--space-6) var(--space-4);
  }

  /* Auth */
  .auth-card {
    padding: var(--space-6);
  }

  .auth-container {
    padding: var(--space-4);
  }

  /* Modal */
  .modal {
    margin: var(--space-4);
    padding: var(--space-6);
  }

  /* Tabs scroll */
  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  /* Cards */
  .card {
    padding: var(--space-4);
  }

  /* Toast */
  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    top: var(--space-4);
  }

  .toast {
    min-width: auto;
  }

  /* AI Chat */
  .ai-chat-window {
    width: calc(100vw - 32px) !important;
    height: 70vh !important;
    right: 16px !important;
    bottom: 80px !important;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .stats-grid {
    grid-template-columns: 1fr !important;
  }

  .hero-title {
    font-size: var(--text-3xl) !important;
  }
}

/* Desktop Large */
@media (min-width: 1400px) {
  .container {
    max-width: var(--container-2xl);
  }
}

/* Hover only on devices with pointer */
@media (hover: hover) {
  .card-interactive:hover {
    transform: translateY(-2px);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Print */
@media print {
  .sidebar, .ai-chat-btn, .ai-chat-window, .toast-container,
  .mobile-menu-btn, .hamburger {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}