/* ============================================================
   MOBILE.CSS — BangDinhNhom Theme
   Mobile-specific overrides, touch optimizations
   Additional breakpoints below 480px
   ============================================================ */

/* ── TOUCH-FRIENDLY SIZES ────────────────────────────────── */
@media (max-width: 768px) {
  /* Minimum tap target 44px */
  .btn, a.btn,
  .filter-tab,
  .product-tab-btn,
  .mobile-nav-body li a {
    min-height: 44px;
  }

  /* Typography scale down */
  :root {
    --section-padding: 3rem;
  }

  .section-title { font-size: 1.4rem; }

  /* Quote form stack on mobile */
  .quote-form-grid { grid-template-columns: 1fr !important; }

  /* Archive layout single col */
  .archive-filter-inner { flex-direction: column; align-items: flex-start; }
  .archive-sort { width: 100%; }
  .archive-sort select { width: 100%; }

  /* Single product */
  .product-single-layout { gap: 1.5rem; }
  .product-gallery-thumbs { gap: .35rem; }
  .product-gallery-thumb { width: 60px; height: 60px; }

  /* Product tabs: horizontal scroll */
  .product-tabs-nav { -webkit-overflow-scrolling: touch; }
  .product-tab-btn { flex-shrink: 0; }

  /* Tables: horizontal scroll */
  .specs-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .specs-table { min-width: 500px; }

  /* Ticker on mobile: faster */
  .clients-ticker { animation-duration: 15s; }

  /* Hero */
  .hero-grid { padding: 2.5rem 0; }
  .hero-scroll { display: none; }

  /* Review swiper */
  .swiper-slide { height: auto; }
}

/* ── SMALL MOBILE (< 480px) ──────────────────────────────── */
@media (max-width: 480px) {
  :root { --section-padding: 2.25rem; }

  .container { padding: 0 .875rem; }

  /* Hero */
  .hero-title { font-size: 1.75rem; }
  .hero-btn-primary,
  .hero-btn-secondary { padding: .75rem 1.25rem; font-size: .88rem; }
  .hero-stats { gap: 1.25rem; }
  .hero-stat-num { font-size: 1.4rem; }
  .hero-badge { font-size: .65rem; }

  /* Categories */
  .categories-grid { grid-template-columns: repeat(2, 1fr); gap: .6rem; }
  .category-icon { width: 44px; height: 44px; }
  .category-icon svg { width: 22px; height: 22px; }
  .category-name { font-size: .75rem; }

  /* Advantages */
  .advantage-number { font-size: 2rem; }
  .feature-strip-item { padding: .9rem 1rem; }

  /* Stats banner */
  .stats-banner { grid-template-columns: repeat(2, 1fr); }
  .stat-banner-num { font-size: 1.8rem; }

  /* Projects */
  .projects-grid { grid-template-columns: 1fr; }

  /* Reviews */
  .review-card { padding: 1.25rem; }
  .aggregate-rating { gap: .75rem; }
  .aggregate-score { font-size: 2.25rem; }

  /* News */
  .news-grid { grid-template-columns: 1fr; }
  .news-grid .news-card:not(:first-child) { flex-direction: column; }
  .news-grid .news-card:not(:first-child) .news-card-image { width: 100%; height: 140px; }

  /* Footer */
  .footer-main { padding: 2.5rem 0 1.5rem; }
  .footer-grid { gap: 1.5rem; }
  .footer-tagline { font-size: .82rem; }
  .footer-contact-item { font-size: .8rem; }

  /* Blog */
  .blog-card-footer { flex-direction: column; align-items: flex-start; gap: .5rem; }

  /* Product card */
  .product-card-footer { flex-direction: column; }
  .product-card-cta-view,
  .product-card-cta-quote { width: 100%; justify-content: center; }

  /* Single product actions */
  .product-actions { gap: .5rem; }
  .btn-quote-now,
  .btn-call-now { padding: .8rem 1.25rem; font-size: .88rem; }

  /* Archive */
  .archive-filter-bar .filter-label { display: none; }
  .filter-tabs { gap: .25rem; }
  .filter-tab { padding: .35rem .7rem; font-size: .75rem; }

  /* Breadcrumb */
  .breadcrumb-list { font-size: .72rem; }

  /* CTA section */
  .cta-buttons { flex-direction: column; align-items: stretch; }
  .cta-buttons .btn,
  .cta-buttons a { text-align: center; justify-content: center; }

  /* Back to top moves up for mobile nav */
  .back-to-top { bottom: 5rem; right: .75rem; width: 38px; height: 38px; }
  .back-to-top svg { width: 15px; height: 15px; }
}

/* ── LANDSCAPE PHONE ─────────────────────────────────────── */
@media (max-width: 768px) and (orientation: landscape) {
  .hero-grid { padding: 1.5rem 0; }
  .hero-section { min-height: auto; }
  .mobile-nav-panel { max-height: 100vh; }
}

/* ── PRINT ───────────────────────────────────────────────── */
@media print {
  .site-header,
  .site-footer,
  .floating-mobile-cta,
  .back-to-top,
  .mobile-nav-overlay,
  .top-bar { display: none !important; }

  .product-single-layout { grid-template-columns: 1fr; }
  .product-gallery { position: static; }
  .product-quote-section { display: none; }

  body { font-size: 12pt; color: #000; }
  a { text-decoration: underline; color: #000; }
  .specs-table { border: 1pt solid #ccc; }
  .specs-table th { background: #eee !important; color: #000 !important; }
}

/* ── PRELOADER ───────────────────────────────────────────── */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--color-primary-dark);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1.25rem;
  transition: opacity .4s, visibility .4s;
}

#preloader.loaded {
  opacity: 0;
  visibility: hidden;
}

.preloader-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.preloader-logo span { color: var(--color-accent); }

.preloader-bar {
  width: 200px;
  height: 3px;
  background: rgba(255,255,255,.15);
  border-radius: 2px;
  overflow: hidden;
}

.preloader-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  border-radius: 2px;
  animation: preloader-load 1.2s ease-out forwards;
}

@keyframes preloader-load {
  from { width: 0; }
  to { width: 100%; }
}

/* ── ACCESSIBILITY ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .hero-foil-shimmer,
  .hero-product-svg,
  .clients-ticker,
  .preloader-bar-fill { animation: none !important; }
}

/* Skip to content for keyboard users */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 10000;
  padding: .75rem 1.5rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top .2s;
}

.skip-to-content:focus { top: 0; }

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ── CUSTOM SCROLLBAR ────────────────────────────────────── */
@media (min-width: 768px) {
  ::-webkit-scrollbar { width: 8px; height: 8px; }
  ::-webkit-scrollbar-track { background: var(--color-bg); }
  ::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }
}

/* ── COMMON FORM ─────────────────────────────────────────── */
.quote-form {
  display: flex;
  flex-direction: column;
  gap: .9rem;
}

.quote-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.form-group label {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: rgba(255,255,255,.75);
}

.form-group.dark-form label { color: var(--color-text); }

.form-group input,
.form-group select,
.form-group textarea {
  padding: .7rem .9rem;
  background: rgba(255,255,255,.1);
  border: 1.5px solid rgba(255,255,255,.2);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-body);
  font-size: .88rem;
  transition: border-color .2s, background .2s;
}

.form-group.dark-form input,
.form-group.dark-form select,
.form-group.dark-form textarea {
  background: #fff;
  border-color: var(--color-border);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(255,255,255,.6);
  background: rgba(255,255,255,.15);
}

.form-group.dark-form input:focus,
.form-group.dark-form select:focus,
.form-group.dark-form textarea:focus {
  border-color: var(--color-primary);
  background: #fff;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.4); }
.form-group.dark-form input::placeholder,
.form-group.dark-form textarea::placeholder { color: var(--color-text-muted); }

.form-group textarea { resize: vertical; min-height: 90px; }

.form-group select option { background: #fff; color: var(--color-text); }

.form-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .85rem 2rem;
  background: var(--color-accent);
  color: #fff;
  font-size: .95rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .2s, transform .15s;
  font-family: var(--font-body);
}

.form-submit-btn:hover {
  background: #e65100;
  transform: translateY(-2px);
}

.form-submit-btn svg { width: 16px; height: 16px; }

.form-submit-btn.loading {
  opacity: .7;
  pointer-events: none;
}

.form-success-msg {
  display: none;
  text-align: center;
  padding: 1.5rem;
  background: rgba(16,185,129,.15);
  border: 1px solid rgba(16,185,129,.3);
  border-radius: var(--radius-sm);
  color: #6ee7b7;
  font-weight: 600;
}

.form-success-msg.show { display: block; }

.form-error-msg {
  display: none;
  padding: .6rem .9rem;
  background: rgba(239,68,68,.15);
  border: 1px solid rgba(239,68,68,.3);
  border-radius: var(--radius-sm);
  color: #fca5a5;
  font-size: .82rem;
}

.form-error-msg.show { display: block; }

/* ── LOAD MORE BUTTON ────────────────────────────────────── */
.load-more-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 2.5rem;
  background: #fff;
  color: var(--color-primary);
  font-size: .9rem;
  font-weight: 700;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  transition: background .2s, color .2s;
}

.load-more-btn:hover {
  background: var(--color-primary);
  color: #fff;
}

.load-more-btn.loading {
  opacity: .6;
  pointer-events: none;
}

.load-more-btn svg { width: 16px; height: 16px; }

/* ── BREADCRUMB ──────────────────────────────────────────── */
.breadcrumb {
  padding: .75rem 0;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: .78rem;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: .35rem;
  color: rgba(255,255,255,.5);
}

.breadcrumb-list li a {
  color: rgba(255,255,255,.65);
  text-decoration: none;
  transition: color .2s;
}

.breadcrumb-list li a:hover { color: #fff; }

.breadcrumb-list li.current { color: rgba(255,255,255,.85); }

.breadcrumb-sep {
  color: rgba(255,255,255,.3);
  font-size: .7rem;
}

/* Dark breadcrumb variant */
.breadcrumb-dark .breadcrumb-list li { color: var(--color-text-muted); }
.breadcrumb-dark .breadcrumb-list li a { color: var(--color-primary); }
.breadcrumb-dark .breadcrumb-list li.current { color: var(--color-text); }
.breadcrumb-dark .breadcrumb-sep { color: var(--color-border); }