/* ================================================================
   MOBILE.CSS — Responsive styles cho toàn bộ website Phoi.vn
   Breakpoints: 1100px | 768px | 480px | 360px
   ================================================================ */

/* ═══════════════════════════════════════
   TABLET (≤ 1100px)
═══════════════════════════════════════ */
@media (max-width: 1100px) {

  /* Grids */
  .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .strengths-grid { grid-template-columns: repeat(2, 1fr); }

  /* Product Detail */
  .detail-layout { grid-template-columns: 1fr; gap: 40px; }

  /* Cart */
  .cart-layout { grid-template-columns: 1fr; }
  .checkout-panel { position: static; }

  /* Hero text size */
  .hero-title { font-size: clamp(2.4rem, 5vw, 4rem); }

  /* About dark section on index */
  .section-dark .container > div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
    gap: 40px !important;
  }
}

/* ═══════════════════════════════════════
   MOBILE (≤ 768px)
═══════════════════════════════════════ */
@media (max-width: 768px) {

  /* ── Layout ──────────────────────────── */
  .container { padding: 0 18px; }
  .section { padding: 52px 0; }
  .section-sm { padding: 40px 0; }

  /* ── Header ──────────────────────────── */
  .nav-links { display: none; }
  .header-zalo { display: none; }
  .mobile-menu-btn { display: flex; }
  .site-header { height: 60px; }
  --header-h: 60px;

  /* ── Announcement bar shorter ───────── */
  .announcement-bar { height: 30px; }
  .announcement-track span { font-size: 0.65rem; }

  /* ── HERO ────────────────────────────── */
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-content {
    padding: 48px 18px 36px;
    order: 2;
  }

  .hero-image-col {
    order: 1;
    border-left: none;
    border-bottom: 1px solid var(--color-border-dk);
    height: 72vw;
    min-height: 260px;
    max-height: 420px;
  }

  .hero-title {
    font-size: clamp(2.2rem, 8vw, 3rem);
    margin-bottom: 18px;
  }

  .hero-desc {
    font-size: 0.9rem;
    margin-bottom: 28px;
  }

  .hero-eyebrow { margin-bottom: 16px; }

  .hero-actions {
    flex-direction: column;
    gap: 10px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }

  /* ── Marquee ─────────────────────────── */
  .marquee-item { font-size: 0.65rem; letter-spacing: 0.12em; }

  /* ── Strengths Grid ──────────────────── */
  .strengths-grid { grid-template-columns: 1fr 1fr; }
  .strength-card { padding: 28px 20px; }
  .strength-number { font-size: 2.5rem; }

  /* ── Section headers ─────────────────── */
  .section-title { font-size: clamp(1.6rem, 6vw, 2.4rem); }
  .section-header { margin-bottom: 36px; }

  /* ── Products header ─────────────────── */
  .products-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  /* ── Grids ───────────────────────────── */
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 14px; }

  /* ── Product Card ────────────────────── */
  .product-card-name { font-size: 1rem; }
  .product-card-desc { display: none; } /* save space on mobile */
  .product-card-body { padding: 14px 14px 16px; }

  /* ── CTA Banner ──────────────────────── */
  .cta-banner {
    grid-template-columns: 1fr;
    padding: 36px 24px;
    gap: 24px;
  }

  .cta-title { font-size: clamp(1.4rem, 5vw, 2rem); }

  .cta-banner .btn {
    width: 100%;
    justify-content: center;
  }

  /* ── About body ──────────────────────── */
  .about-body { grid-template-columns: 1fr; gap: 36px; }
  .about-hero { padding-top: 48px; padding-bottom: 48px; }
  .about-img { aspect-ratio: 16/9; }

  /* ── Filter bar ──────────────────────── */
  .filter-bar { flex-direction: column; align-items: flex-start; gap: 12px; }
  .search-input { width: 100%; }
  .filter-tags { flex-wrap: wrap; gap: 8px; }
  .filter-tag { padding: 7px 14px; font-size: 0.65rem; }

  /* ── Product Detail ──────────────────── */
  .detail-layout { padding-top: 28px; gap: 32px; }
  .detail-title { font-size: clamp(1.6rem, 6vw, 2rem); }
  .detail-ctas { grid-template-columns: 1fr; gap: 10px; }
  .gallery-thumbs { flex-wrap: wrap; }

  .bulk-label {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  /* ── Cart ────────────────────────────── */
  .cart-layout { padding-top: 28px; gap: 32px; }
  .checkout-panel { padding: 24px 18px; }
  .cart-item-img { width: 72px; height: 88px; }

  /* ── Dark section grid (about strip on index) ─ */
  .section-dark .container > div {
    grid-template-columns: 1fr !important;
    gap: 36px !important;
  }

  /* ── Footer ──────────────────────────── */
  .site-footer { padding: 52px 0 32px; margin-top: 72px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; font-size: 0.72rem; }

  /* ── Zalo float ──────────────────────── */
  .zalo-float {
    bottom: 16px;
    right: 16px;
    padding: 10px 14px 10px 10px;
  }

  .zalo-float-icon { width: 30px; height: 30px; font-size: 0.65rem; }
  .zalo-float-text { font-size: 0.65rem; }

  /* ── Breadcrumb ──────────────────────── */
  .breadcrumb { font-size: 0.65rem; margin-bottom: 24px; }

  /* ── About contact grid ──────────────── */
  .contact-grid { grid-template-columns: 1fr !important; gap: 36px !important; }
}

/* ═══════════════════════════════════════
   SMALL MOBILE (≤ 480px)
═══════════════════════════════════════ */
@media (max-width: 480px) {

  /* Hero */
  .hero-title { font-size: clamp(1.9rem, 9vw, 2.5rem); }
  .hero-content { padding: 36px 0 28px; }
  .hero-image-col { height: 80vw; }

  /* Grids → 1 column on very small screens */
  .grid-2,
  .grid-4 { grid-template-columns: 1fr; }

  /* Product cards bigger on single column */
  .product-img-wrap { aspect-ratio: 3/2; }
  .product-card-desc { display: block; }

  /* Strengths → 1 column */
  .strengths-grid { grid-template-columns: 1fr; }

  /* Section title */
  .section-title { font-size: clamp(1.5rem, 8vw, 2rem); }

  /* Footer → 1 column */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }

  /* Btn full width in actions */
  .hero-actions .btn,
  .detail-ctas .btn { font-size: 0.75rem; }

  /* Checkout panel */
  .checkout-panel { padding: 20px 16px; }

  /* Cart item compact */
  .cart-item { gap: 14px; }
  .cart-item-img { width: 60px; height: 75px; }

  /* CTA banner */
  .cta-banner { padding: 28px 18px; }

  /* About hero */
  .about-hero { padding-top: 36px; padding-bottom: 36px; }
}

/* ═══════════════════════════════════════
   VERY SMALL (≤ 360px — iPhone SE, older)
═══════════════════════════════════════ */
@media (max-width: 360px) {
  .container { padding: 0 14px; }
  .hero-title { font-size: 1.75rem; }
  .btn { padding: 12px 18px; font-size: 0.7rem; }
  .logo-img { width: 40px; height: 40px; }
  .filter-tag { padding: 6px 10px; }
}

/* ═══════════════════════════════════════
   TOUCH / HOVER TWEAKS
═══════════════════════════════════════ */
@media (hover: none) {
  /* Disable hover transforms on touch devices */
  .product-card:hover { transform: none; border-color: var(--color-border); }
  .hero-image-col:hover img { transform: none; }
  .strength-card:hover { background: transparent; }
  .strength-card:hover .strength-number { color: var(--color-border); }
  .strength-card:hover .strength-title { color: var(--color-text); }
  .strength-card:hover .strength-desc { color: var(--color-text-sub); }
}