/**
 * 99tools Design System — Responsive Styles
 * Breakpoints: 1280px | 1024px | 768px | 640px | 480px | 360px
 * Fixes: mobile nav, font spacing, tool grids, blog card, workspace, calculator
 *
 * @package 99tools
 */

/* ==========================================================================
   MOBILE NAV DRAWER
   ========================================================================== */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 290px;
  max-width: 88vw;
  background: var(--bg-surface-elevated);
  border-right: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xl);
  z-index: 10000;
  transform: translateX(-100%);
  transition: transform var(--transition-smooth);
  display: flex;
  flex-direction: column;
  padding: 1.35rem;
  /* safe area for notch-based phones */
  padding-top: max(1.35rem, env(safe-area-inset-top));
  padding-left: max(1.35rem, env(safe-area-inset-left));
}

.mobile-nav-drawer.is-open {
  transform: translateX(0);
}

.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.mobile-nav-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer-menu,
.mobile-drawer-menu ul {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.mobile-drawer-menu {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-drawer-menu li {
  list-style: none !important;
}

.mobile-drawer-menu li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.62rem 0.85rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.4;
}

.mobile-drawer-menu li a:hover,
.mobile-drawer-menu li.current-menu-item > a {
  background: var(--brand-gold-light);
  color: var(--brand-gold);
}

.mobile-drawer-menu .sub-menu {
  padding-left: 0.75rem !important;
  margin-top: 0.2rem !important;
  margin-bottom: 0.4rem !important;
  border-left: 2px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mobile-drawer-menu .sub-menu li a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.42rem 0.75rem;
}

.mobile-drawer-footer {
  margin-top: auto;
  padding-top: 1.35rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-bottom: max(0.5rem, env(safe-area-inset-bottom));
}

/* ==========================================================================
   LARGE TABLETS / SMALL LAPTOPS — ≤ 1280px
   ========================================================================== */
@media (max-width: 1280px) {
  .tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 2rem;
  }
}

/* ==========================================================================
   TABLETS — ≤ 1024px
   ========================================================================== */
@media (max-width: 1024px) {
  /* Hide desktop nav, show mobile toggle */
  .desktop-nav          { display: none !important; }
  .mobile-nav-toggle    { display: flex !important; }

  /* Search button: hide label + shortcut, keep icon only */
  .search-trigger-btn .search-label,
  .search-trigger-btn .search-kbd-shortcut { display: none; }
  .search-trigger-btn { padding: 0.4rem; border-radius: var(--radius-full); }

  /* Single post: collapse sidebar */
  .single-post-layout {
    grid-template-columns: 1fr;
  }
  .single-post-sidebar { order: 2; }

  /* Stats 2-col */
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  /* Footer 2-col */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  /* Featured blog card collapse */
  .featured-blog-card,
  .featured-blog-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

/* ==========================================================================
   MEDIUM SCREENS / TABLETS — ≤ 900px
   ========================================================================== */
@media (max-width: 900px) {
  /* Contact Page — collapse 2-column grid to single column */
  .contact-grid-wrap {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
    margin-bottom: 2.5rem !important;
  }

}

/* ==========================================================================
   MOBILE — ≤ 768px
   ========================================================================== */
@media (max-width: 768px) {
  /* Header: tighter height on mobile */
  :root { --header-h: 60px; }

  .header-inner { height: var(--header-h); gap: 0.5rem; }

  /* Hide CTA button in header on mobile */
  .header-actions .btn { display: none; }

  .custom-logo {
    height: 30px !important;
    max-height: 30px !important;
    max-width: 130px !important;
  }
  img.logo-dark,
  .site-branding img.logo-dark,
  .custom-logo-link img.logo-dark,
  .mobile-drawer-header img.logo-dark {
    display: none !important;
  }
  img.logo-light,
  .site-branding img.logo-light,
  .custom-logo-link img.logo-light,
  .mobile-drawer-header img.logo-light {
    display: block !important;
  }
  [data-theme="dark"] img.logo-dark,
  [data-theme="dark"] .site-branding img.logo-dark,
  [data-theme="dark"] .custom-logo-link img.logo-dark,
  [data-theme="dark"] .mobile-drawer-header img.logo-dark {
    display: block !important;
  }
  [data-theme="dark"] img.logo-light,
  [data-theme="dark"] .site-branding img.logo-light,
  [data-theme="dark"] .custom-logo-link img.logo-light,
  [data-theme="dark"] .mobile-drawer-header img.logo-light {
    display: none !important;
  }
  .brand-text-logo { font-size: 1.15rem; }
  .brand-badge { font-size: 0.55rem; padding: 1px 5px; }

  /* Hero adjustments */
  .hero-section { padding: 2.5rem 0 2rem; }
  .hero-pill-badge { font-size: 0.76rem; padding: 0.32rem 0.85rem; }
  .hero-subtitle { font-size: 0.92rem; }

  /* Hero search: shrink placeholder, full-width */
  .hero-search-box { flex-wrap: nowrap; }
  .hero-search-input::placeholder { font-size: 0.82rem; }
  .hero-search-btn { padding: 0.55rem 0.9rem; font-size: 0.82rem; }

  /* Quick tags — horizontal scroll, no wrap */
  .quick-tags-wrap {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.25rem;
  }
  .quick-tags-wrap::-webkit-scrollbar { display: none; }

  /* Tools grid: 1 col */
  .tools-grid {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }

  /* Stats: 1 col */
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.1rem;
  }

  /* Footer: 1 col */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding: 2.5rem 0 2rem;
  }
  .footer-cta-wrapper {
    flex-direction: column;
    text-align: center;
  }
  .footer-cta-text h3 { font-size: 1.3rem; }
  .footer-brand p { max-width: 100%; }

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.6rem;
  }

  /* Category filter tabs — smooth horizontal scroll on mobile */
  .category-filter-nav,
  .workspace-tabs-strip {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    justify-content: flex-start !important;
    padding: 0.4rem 1rem 0.65rem 0.25rem !important;
    gap: 0.45rem !important;
    width: 100% !important;
  }
  .category-filter-nav::-webkit-scrollbar,
  .workspace-tabs-strip::-webkit-scrollbar { display: none !important; }

  .cat-filter-btn,
  .workspace-tab-btn {
    flex-shrink: 0 !important;
    white-space: nowrap !important;
    font-size: 0.8rem !important;
    padding: 0.42rem 0.85rem !important;
  }

  /* Workspace toolbar on mobile */
  .workspace-toolbar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.6rem !important;
    padding: 0.75rem 1rem !important;
  }

  .workspace-title-indicator {
    width: 100% !important;
  }

  .workspace-active-title { font-size: 0.92rem !important; }
  .workspace-active-desc  { font-size: 0.74rem !important; }

  .workspace-actions {
    width: 100% !important;
    justify-content: flex-end !important;
    gap: 0.4rem !important;
    border-top: 1px solid var(--border-subtle) !important;
    padding-top: 0.55rem !important;
  }

  .workspace-action-btn {
    padding: 0.32rem 0.65rem !important;
    font-size: 0.77rem !important;
  }

  /* Fullscreen on mobile */
  .tool-workspace-container.is-fullscreen .workspace-toolbar {
    flex-direction: column !important;
    padding: 0.7rem 1rem !important;
    gap: 0.55rem !important;
  }

  .tool-workspace-container.is-fullscreen .workspace-tabs-strip {
    top: 0 !important;
    padding: 0.5rem 1rem !important;
  }

  .tool-workspace-container.is-fullscreen .workspace-canvas {
    padding: 0.9rem 0.85rem !important;
  }

  /* Exit fullscreen button on mobile — always visible */
  .tool-workspace-container.is-fullscreen .workspace-btn-exit {
    font-size: 0.78rem !important;
    padding: 0.38rem 0.8rem !important;
  }

  /* 2-col tool grids → 1 col on mobile */
  .tool-two-col-grid,
  .tool-inner-stats-grid,
  .interactive-tool-box [style*="grid-template-columns:1fr 1fr"],
  .interactive-tool-box [style*="grid-template-columns: 1fr 1fr"],
  .interactive-tool-box [style*="grid-template-columns: 2fr 1fr"],
  .interactive-tool-box [style*="grid-template-columns:2fr 1fr"],
  .interactive-tool-box [style*="grid-template-columns: 1fr 1fr;"] {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  /* Large result numbers in calculators */
  #emiResultAmount,
  #agePrimaryResult,
  #bmiScore,
  #bwResultTime {
    font-size: clamp(1.75rem, 6vw, 2.25rem) !important;
  }

  .workspace-canvas {
    padding: 1.1rem 0.9rem;
  }

  /* Blog page featured card: 1 col on mobile */
  .featured-blog-card,
  .featured-blog-grid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
    padding: 1.35rem !important;
  }

  .featured-blog-visual {
    min-height: 180px !important;
    padding: 1.5rem 1rem !important;
  }

  /* Newsletter form: stack on mobile */
  .blog-newsletter-form,
  .newsletter-email-form {
    flex-direction: column !important;
  }
  .blog-newsletter-input,
  .blog-newsletter-btn,
  .newsletter-email-input {
    min-width: unset !important;
    width: 100% !important;
    flex: none !important;
  }
  .blog-newsletter-btn {
    justify-content: center !important;
  }

  /* How-To guide grid */
  .howto-steps-grid { grid-template-columns: 1fr; }

  /* Tool card footer: stack on mobile */
  .tool-card-footer {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  /* Author box: stack on mobile */
  .author-box {
    flex-direction: column;
    gap: 0.85rem;
  }

  /* Search modal: full mobile padding */
  .search-modal-backdrop {
    padding: 1.5rem 0.75rem 1.5rem;
    align-items: flex-start;
  }
  .search-modal-container { border-radius: var(--radius-md); }
}

/* ==========================================================================
   SMALL PHONES — ≤ 640px
   ========================================================================== */
@media (max-width: 640px) {
  .tool-howto-guide,
  .tool-faq-section {
    padding: 1.1rem 0.9rem;
  }

  .faq-question { font-size: 0.88rem; padding: 0.8rem 1rem; }
  .faq-answer { padding: 0.65rem 1rem 0.9rem; }

  /* Stats bar: compact */
  .stat-icon { width: 38px; height: 38px; }
  .stat-content h4 { font-size: 0.95rem; }

  /* Single post content — clean, legible mobile reading */
  .single-post-content { font-size: 1rem; line-height: 1.75; }
  .single-post-content pre { font-size: 0.82rem; padding: 0.95rem; }

  /* Contact Page form inputs and email box stack */
  .contact-form-row-2col {
    grid-template-columns: 1fr !important;
    gap: 1.25rem !important;
  }
  .contact-email-box {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 0.75rem !important;
  }
  .contact-email-box .btn {
    width: 100% !important;
    justify-content: center !important;
  }
}

/* ==========================================================================
   EXTRA SMALL PHONES — ≤ 480px
   ========================================================================== */
@media (max-width: 480px) {
  .site-container,
  .site-container-narrow {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  /* Hero: very small screens */
  .hero-section { padding: 2rem 0 1.75rem; }
  .hero-pill-badge { font-size: 0.72rem; padding: 0.28rem 0.75rem; }
  .hero-search-box {
    padding: 0.38rem 0.45rem 0.38rem 0.9rem;
  }
  .hero-search-btn {
    padding: 0.55rem 0.85rem;
    font-size: 0.78rem;
  }
  /* Hide search button text on tiny screens to avoid truncating placeholder */
  .hero-search-btn-text {
    display: none !important;
  }

  /* Quick tags horizontal swipe */
  .quick-tags-wrap {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    padding: 0.35rem 0.5rem 0.5rem 0.25rem !important;
    gap: 0.45rem !important;
    width: 100% !important;
  }
  .quick-tags-wrap::-webkit-scrollbar { display: none !important; }

  /* Tool card padding */
  .tool-card { padding: 1rem; }

  /* Workspace canvas */
  .workspace-canvas { padding: 0.75rem; }

  /* iframe in workspace — smaller min-height */
  .workspace-canvas iframe { min-height: 380px; }

  /* Calculator numbers */
  #emiResultAmount,
  #agePrimaryResult,
  #bmiScore,
  #bwResultTime {
    font-size: clamp(1.5rem, 7vw, 1.85rem) !important;
  }

  /* Flatten flex rows in tools */
  .interactive-tool-box div[style*="display: flex; gap: 0.75rem;"],
  .interactive-tool-box div[style*="display:flex; gap:0.75rem;"] {
    flex-direction: column !important;
    width: 100% !important;
  }

  .interactive-tool-box div[style*="display: flex; gap: 0.75rem;"] .btn,
  .interactive-tool-box div[style*="display:flex; gap:0.75rem;"] .btn {
    width: 100% !important;
    justify-content: center !important;
  }

  /* Footer CTA section */
  .footer-top-cta { padding: 2.25rem 0; }
  .footer-cta-text h3 { font-size: 1.2rem; }

  /* Pagination */
  .page-numbers li a,
  .page-numbers li span {
    min-width: 34px;
    height: 34px;
    font-size: 0.82rem;
  }

  /* Blog page: featured badge */
  .tool-pill { font-size: 0.65rem; padding: 0.15rem 0.45rem; }

  /* Blog Hub & Article mobile typography tuning */
  .blog-hub-page { padding: 1.5rem 0 3rem; }
  .blog-hub-title {
    font-size: clamp(1.6rem, 7vw, 2.15rem) !important;
    line-height: 1.18 !important;
    letter-spacing: -0.03em !important;
  }
  .blog-hub-subtitle {
    font-size: 0.92rem !important;
    line-height: 1.6 !important;
  }

  .featured-blog-card {
    padding: 1.1rem !important;
    gap: 1.25rem !important;
    border-radius: var(--radius-lg) !important;
  }
  .featured-blog-title {
    font-size: 1.25rem !important;
    line-height: 1.3 !important;
    letter-spacing: -0.025em !important;
  }
  .featured-blog-excerpt {
    font-size: 0.88rem !important;
    line-height: 1.58 !important;
    margin-bottom: 1.1rem !important;
  }
  .featured-blog-meta {
    gap: 0.45rem 0.65rem !important;
    font-size: 0.76rem !important;
  }
  .featured-blog-visual {
    min-height: 140px !important;
    padding: 1.2rem 0.85rem !important;
  }
  .featured-blog-visual .visual-emoji {
    font-size: 2.5rem !important;
  }
  .featured-blog-visual .visual-title {
    font-size: 1.02rem !important;
  }

  /* Single Article Title on mobile */
  .single-tool-header .entry-title {
    font-size: clamp(1.4rem, 6vw, 1.85rem) !important;
    line-height: 1.25 !important;
    letter-spacing: -0.028em !important;
  }
  .single-header-meta {
    gap: 0.4rem 0.65rem !important;
    font-size: 0.78rem !important;
  }

  /* Tool & blog post cards in grid */
  .tool-card-title {
    font-size: 1.05rem !important;
    line-height: 1.35 !important;
  }
  .tool-card-excerpt {
    font-size: 0.85rem !important;
    line-height: 1.55 !important;
  }
}

/* ==========================================================================
   MINIMUM SUPPORTED — ≤ 360px (very small Android devices)
   ========================================================================== */
@media (max-width: 360px) {
  .site-container,
  .site-container-narrow {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  :root { --header-h: 56px; }

  .brand-text-logo { font-size: 1rem; }
  .brand-badge { display: none; }

  .hero-search-input::placeholder { font-size: 0.76rem; }
  .hero-search-btn span { display: none; } /* icon only */

  .cat-filter-btn { font-size: 0.75rem !important; padding: 0.35rem 0.75rem !important; }

  .tool-card { padding: 0.85rem; }
  .tool-card-title { font-size: 0.95rem; }
  .tool-card-excerpt { font-size: 0.82rem; }
}

/* ==========================================================================
   HOVER — Only on devices that support hover (non-touch)
   ========================================================================== */
@media (hover: none) {
  /* Remove hover transforms on touch devices — prevents stuck states */
  .tool-card:hover          { transform: none; }
  .btn-primary:hover        { transform: none; }
  .hero-search-btn:hover    { transform: none; }
  .quick-tag-pill:hover     { transform: none; }
  .scroll-top-btn:hover     { transform: none; }
}

/* ==========================================================================
   PRINT
   ========================================================================== */
@media print {
  .site-header,
  .mobile-nav-drawer,
  .mobile-nav-backdrop,
  .search-modal-backdrop,
  .scroll-top-btn,
  .hero-search-wrapper,
  .workspace-toolbar,
  .workspace-tabs-strip,
  .footer-top-cta,
  .category-filter-nav {
    display: none !important;
  }

  body { background: #fff; color: #000; }
  .site-container { max-width: 100%; padding: 0; }
  .single-post-layout { grid-template-columns: 1fr; }
  .single-post-sidebar { display: none; }
}