/* ============================================
   YIFU Responsive
   Breakpoints: 375 / 768 / 1024 / 1280 / 1440 / 1920
   One DOM + Responsive CSS
   ============================================ */

/* ========== Large Desktop (1440+) ========== */
@media (min-width: 1441px) {
  .container {
    width: min(100% - 80px, 1320px);
  }
}

/* ========== Desktop (1025-1440) ========== */
@media (max-width: 1440px) {
  .desktop-nav {
    gap: var(--space-6);
  }

  .mega-menu {
    width: min(100vw - 32px, 820px);
    padding: var(--space-10) var(--space-10);
  }

  .mega-menu__grid {
    gap: var(--space-8);
  }
}

/* ========== Tablet / Small Desktop (1024 and below) ========== */
@media (max-width: 1024px) {
  :root {
    --header-height: 68px;
  }

  /* Hide desktop nav, show mobile button */
  .desktop-nav {
    display: none;
  }

  .header-purchase-btn {
    display: none;
  }

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

  .header-search-btn span {
    display: none;
  }

  /* Hero two-column -> stacked */
  .page-hero__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .page-hero__media {
    max-width: 560px;
    margin-inline: auto;
    width: 100%;
    aspect-ratio: 3 / 2;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

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

  /* Section spacing */
  .section {
    padding-block: clamp(56px, 7vw, 88px);
  }

  .section--lg {
    padding-block: clamp(64px, 8vw, 110px);
  }

  /* Page Hero */
  .page-hero {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  /* Search Overlay */
  .search-overlay__inner {
    padding-top: var(--space-12);
  }
}

/* ========== Tablet (768 and below) ========== */
@media (max-width: 768px) {
  :root {
    --container-width: min(100% - 32px, 1320px);
  }

  /* Header */
  .header-inner {
    gap: var(--space-4);
  }

  .site-logo img {
    height: 32px;
  }

  /* Grids */
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  /* Footer */
  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding-bottom: var(--space-12);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer-legal {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  /* Product Card */
  .product-card__body {
    padding: var(--space-5, 20px) var(--space-5, 20px) var(--space-6, 24px);
  }

  /* Section Header */
  .section-header {
    margin-bottom: var(--space-10);
  }

  /* CTA */
  .cta-section {
    padding-block: clamp(44px, 9vw, 64px);
  }

  /* Buttons */
  .btn {
    padding: 12px 28px;
    font-size: 0.875rem;
  }

  /* Search Overlay */
  .search-overlay__input {
    font-size: 1.5rem;
  }

  .search-overlay__inner {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
  }

  /* Mobile Drawer */
  .mobile-nav-item__toggle {
    font-size: 1.2rem;
  }

  /* Prose */
  .prose h2 {
    margin-top: var(--space-8);
  }

  /* Ingredient / Concern Cards */
  .ingredient-card,
  .concern-card {
    padding: var(--space-6);
  }
}

/* ========== Mobile (640 and below) ========== */
@media (max-width: 640px) {
  body {
    font-size: 0.9375rem;
  }

  /* Hero */
  .page-hero {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
  }

  .page-hero__media {
    aspect-ratio: 4 / 3;
  }

  .page-hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .page-hero__desc {
    font-size: 1rem;
  }

  /* Section spacing tighter */
  .section {
    padding-block: 56px;
  }

  .section--lg {
    padding-block: 72px;
  }

  /* Footer */
  .site-footer {
    padding-top: var(--space-16);
  }

  /* FAQ */
  .faq-item__question {
    font-size: 1rem;
    padding: var(--space-5) 0;
  }

  /* Buttons full width on mobile for CTAs */
  .cta-section .btn {
    width: 100%;
    max-width: 320px;
  }

  /* Breadcrumb */
  .breadcrumb {
    padding: var(--space-4) 0;
    font-size: 0.75rem;
  }
}

/* ========== Small Mobile (375 and below) ========== */
@media (max-width: 375px) {
  :root {
    --container-width: min(100% - 24px, 1320px);
  }

  .site-logo img {
    height: 28px;
  }

  .header-actions {
    gap: var(--space-2);
  }

  .product-card__name {
    font-size: 1.1rem;
  }

  .article-card__title {
    font-size: 1.05rem;
  }
}

/* ========== Touch Device Optimizations ========== */
@media (hover: none) and (pointer: coarse) {
  /* Disable hover effects on touch */
  .product-card:hover,
  .concern-card:hover,
  .article-card:hover .article-card__image img {
    transform: none;
  }

  .product-card:hover .product-card__image img {
    transform: none;
  }

  /* Ensure tap targets */
  .desktop-nav__link,
  .footer-col__link,
  .mega-menu__link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

/* ========== Reduced Motion (Responsive context) ========== */
@media (prefers-reduced-motion: reduce) {
  .mega-menu,
  .mobile-drawer,
  .search-overlay,
  .drawer-overlay {
    transition: none !important;
  }

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

/* ========== Print ========== */
@media print {
  .site-header,
  .site-footer,
  .mobile-drawer,
  .search-overlay,
  .drawer-overlay {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }
}

/* Blog layout responsive */
@media (max-width: 960px) {
  .blog-layout {
    grid-template-columns: 1fr;
  }
  .blog-sidebar {
    position: static;
  }
  .blog-filter {
    justify-content: flex-start;
  }
}