/* ==========================================================================
   FENGOO.IN RESPONSIVE SYSTEM (css/responsive.css)
   Guaranteed Cross-Device Layout: Mobile (320px-480px), Phablets (481px-680px),
   Tablets (681px-1080px), Laptops (1081px-1280px), and Desktops (1281px+)
   Zero Content Cut-Off Guarantee
   ========================================================================== */

/* 1. Universal Anti-Overflow & Boundary Protection */
html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
  -webkit-text-size-adjust: 100%;
}

*, *::before, *::after {
  box-sizing: border-box;
}

/* Ensure no media item ever forces horizontal overflow */
img, svg, video, canvas, audio, iframe {
  max-width: 100%;
  height: auto;
}

/* Text word-break protection for Indian languages, bank names & long URLs */
h1, h2, h3, h4, h5, h6, p, span, a, label, li, td, th {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

/* Prevent auto-zoom on iOS Safari when focusing inputs */
input, select, textarea {
  font-size: 16px !important;
  max-width: 100%;
}

/* Ensure all tables are horizontally scrollable on small screens instead of pushing out viewport */
.table-responsive,
.data-table-wrap,
.guide-table-wrap,
.spec-table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0;
  display: block;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

table {
  max-width: 100%;
}

/* 2. LAPTOPS & TABLETS IN LANDSCAPE (max-width: 1080px) */
@media (max-width: 1080px) {
  /* When screen is under 1080px, 13 navigation links exceed 1 row.
     Switch to clean mobile hamburger menu to keep header elegant */
  .nav-desktop {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .page-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .page-sidebar-nav {
    display: none;
  }

  .folders-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

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

/* 3. TABLETS IN PORTRAIT (max-width: 900px) */
@media (max-width: 900px) {
  .calc-split {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .entity-hero-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
  }

  .entity-hero-sidebar {
    width: 100%;
    max-width: 100%;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

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

/* 4. PHABLETS & LARGE SMARTPHONES (max-width: 680px) */
@media (max-width: 680px) {
  .container {
    padding: 0 1rem;
  }

  .header-inner {
    height: 60px;
    padding: 0;
  }

  .brand-logo-img {
    width: 32px;
    height: 32px;
  }

  .brand-name {
    font-size: 1.2rem;
  }

  .folders-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .entity-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .grid-categories {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .product-cards-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .calc-card {
    padding: 1.25rem;
  }

  .content-block {
    padding: 1.25rem 1rem;
  }

  .hero {
    padding: 2rem 0 1.5rem;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .btn {
    min-height: 44px; /* Accessible touch target */
    width: 100%;
    text-align: center;
  }

  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }

  .filter-pill {
    padding: 0.45rem 0.85rem;
    font-size: 0.825rem;
  }

  .support-box {
    grid-template-columns: 1fr;
  }

  /* Sticky Deal Bar Mobile */
  .sticky-bottom-deal-bar {
    padding: 0.5rem 0.75rem;
  }

  .deal-bar-content {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
  }

  .deal-text p {
    display: none;
  }

  .floating-community-badge {
    bottom: 5rem;
    right: 0.75rem;
  }

  .float-btn {
    width: 42px;
    height: 42px;
  }

  /* Table auto scroll guarantee */
  table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
}

/* 5. SMALL MOBILE SCREENS (max-width: 480px - iPhone SE, Android compacts) */
@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .header-actions {
    gap: 0.35rem;
  }

  .vip-community-bar {
    padding: 0.4rem 0.5rem;
    font-size: 0.75rem;
    gap: 0.4rem;
  }

  .vip-community-bar .vip-actions {
    width: 100%;
    justify-content: center;
    margin-top: 0.2rem;
  }

  .btn-join-wa, .btn-join-tg {
    padding: 0.25rem 0.5rem;
    font-size: 0.725rem;
  }

  .home-hero-pill {
    font-size: 0.725rem;
    padding: 0.3rem 0.6rem;
    gap: 0.3rem;
  }

  .home-hero h1 {
    font-size: 1.45rem;
  }

  .home-hero p {
    font-size: 0.875rem;
    padding: 0;
  }

  .search-input-box {
    padding: 0.4rem 0.75rem;
  }

  .search-input-box input {
    font-size: 0.875rem;
  }

  .stat-pill-item {
    padding: 0.25rem 0;
    gap: 0.5rem;
  }

  .stat-pill-icon {
    font-size: 1.4rem;
  }

  .stat-pill-text strong {
    font-size: 0.85rem;
  }

  .stat-pill-text span {
    font-size: 0.72rem;
  }

  .section-head-title {
    font-size: 1.35rem;
  }

  .folder-card {
    padding: 1rem;
    gap: 0.75rem;
  }

  .folder-header {
    gap: 0.65rem;
  }

  .folder-icon-box {
    width: 42px;
    height: 42px;
    min-width: 42px;
    font-size: 1.4rem;
  }

  .folder-name {
    font-size: 1.05rem;
  }

  .folder-desc {
    font-size: 0.825rem;
  }

  .folder-tag {
    font-size: 0.685rem;
    padding: 0.15rem 0.45rem;
  }

  .btn-open-folder {
    font-size: 0.825rem;
    padding: 0.6rem 0.75rem;
  }

  .mobile-drawer-content {
    width: 88vw;
    max-width: 320px;
    padding: 1.25rem 1rem;
  }

  .drawer-link {
    font-size: 0.95rem;
    padding: 0.65rem 0.75rem;
  }

  /* Toast & Notification full-width fit */
  .toast-msg,
  #lang-change-toast {
    left: 12px !important;
    right: 12px !important;
    max-width: calc(100vw - 24px) !important;
    transform: none !important;
    box-sizing: border-box;
    font-size: 0.85rem;
  }

  /* Calculator sliders and inputs */
  .calc-slider-box {
    margin-bottom: 1.25rem;
  }

  .calc-val-display {
    font-size: 1.15rem;
  }

  .calc-result-number {
    font-size: 1.6rem;
  }
}

/* 6. ULTRA-NARROW / FOLDABLE DEVICES (max-width: 340px - Galaxy Fold outer screen, etc.) */
@media (max-width: 340px) {
  .container {
    padding: 0 0.5rem;
  }

  .brand-name {
    font-size: 0.95rem;
  }

  .folder-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stat-pill-item {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
}