/* ProTools Comprehensive Mobile & Tablet Responsive CSS */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --primary-glow: rgba(99, 102, 241, 0.15);
  --accent-purple: #8b5cf6;
  --bg-surface: #ffffff;
  --bg-subtle: #f8fafc;
  --border-subtle: #e2e8f0;
  --border-focus: #6366f1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --transition-fast: 0.18s ease;
}

[data-theme="dark"] {
  --bg-surface: #0f172a;
  --bg-subtle: #1e293b;
  --border-subtle: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --primary-light: rgba(99, 102, 241, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Mobile Drawer Backdrop */
.mobile-drawer-backdrop {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  background: rgba(15, 23, 42, 0.6) !important;
  backdrop-filter: blur(3px) !important;
  -webkit-backdrop-filter: blur(3px) !important;
  z-index: 99998 !important;
  opacity: 0 !important;
  pointer-events: none !important;
  transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
}
.mobile-drawer-backdrop.show {
  opacity: 1 !important;
  pointer-events: auto !important;
}

/* Mobile Collapsible Side Drawer (Matches touxiangkong.com) */
.mobile-nav-drawer {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  bottom: 0 !important;
  width: 280px !important;
  max-width: 84vw !important;
  background: var(--bg-surface) !important;
  z-index: 99999 !important;
  box-shadow: 4px 0 28px rgba(0, 0, 0, 0.25) !important;
  transform: translateX(-100%) !important;
  transition: transform 0.28s cubic-bezier(0.33, 1, 0.68, 1) !important;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
}
.mobile-nav-drawer.open {
  transform: translateX(0) !important;
}
[dir="rtl"] .mobile-nav-drawer {
  left: auto !important;
  right: 0 !important;
  transform: translateX(100%) !important;
  box-shadow: -4px 0 28px rgba(0, 0, 0, 0.25) !important;
}
[dir="rtl"] .mobile-nav-drawer.open {
  transform: translateX(0) !important;
}

/* Drawer Header */
.drawer-header {
  padding: 0.9rem 1.1rem !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  border-bottom: 1px solid var(--border-subtle) !important;
  background: var(--bg-surface) !important;
  flex-shrink: 0 !important;
}
.drawer-brand {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  text-decoration: none !important;
  color: var(--text-primary) !important;
}
.drawer-close-btn {
  background: var(--bg-subtle) !important;
  border: 1px solid var(--border-subtle) !important;
  color: var(--text-secondary) !important;
  cursor: pointer !important;
  width: 32px !important;
  height: 32px !important;
  border-radius: 8px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 1rem !important;
  transition: all 0.15s ease !important;
}
.drawer-close-btn:hover {
  background: var(--primary-light) !important;
  color: var(--primary) !important;
}

/* Drawer Body & Navigation List (Exact Style of touxiangkong.com) */
.drawer-body {
  flex: 1 !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  padding: 0 !important;
}
.drawer-nav-list {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
}
.drawer-nav-item {
  border-bottom: 1px solid var(--border-subtle) !important;
}
.drawer-nav-link {
  display: flex !important;
  align-items: center !important;
  padding: 13px 18px !important;
  text-decoration: none !important;
  color: var(--text-primary) !important;
  font-size: 0.94rem !important;
  font-weight: 500 !important;
  transition: all 0.15s ease !important;
}
.drawer-nav-link:hover {
  background: var(--bg-subtle) !important;
  color: var(--primary) !important;
}
/* Active Item (Matching coral/primary header in screenshot) */
.drawer-nav-link.active {
  background: #ff5e52 !important;
  color: #ffffff !important;
  font-weight: 700 !important;
}
.drawer-nav-link.active .drawer-nav-icon,
.drawer-nav-link.active .drawer-nav-text,
.drawer-nav-link.active .drawer-nav-arrow {
  color: #ffffff !important;
}
.drawer-nav-link.active .drawer-nav-count {
  background: rgba(255, 255, 255, 0.25) !important;
  color: #ffffff !important;
}
.drawer-nav-icon {
  font-size: 1.15rem !important;
  margin-right: 12px !important;
  display: flex !important;
  align-items: center !important;
}
[dir="rtl"] .drawer-nav-icon {
  margin-right: 0 !important;
  margin-left: 12px !important;
}
.drawer-nav-text {
  flex: 1 !important;
}
.drawer-nav-count {
  font-size: 0.72rem !important;
  font-weight: 700 !important;
  padding: 2px 7px !important;
  border-radius: 9999px !important;
  background: var(--bg-subtle) !important;
  color: var(--text-muted) !important;
  margin-right: 6px !important;
}
.drawer-nav-arrow {
  font-size: 1rem !important;
  color: var(--text-muted) !important;
  line-height: 1 !important;
}

/* Mobile Expandable Search Bar */
.mobile-search-expand {
  display: none;
  background: var(--bg-surface) !important;
  border-bottom: 1px solid var(--border-subtle) !important;
  padding: 8px 12px !important;
  position: relative !important;
  box-shadow: var(--shadow-sm) !important;
  z-index: 9999 !important;
}
.mobile-search-expand.open {
  display: block !important;
  animation: navDropFade 0.18s ease-out forwards !important;
}
.mobile-search-inner {
  position: relative !important;
  display: flex !important;
  align-items: center !important;
  width: 100% !important;
}
.mobile-search-clear {
  position: absolute !important;
  right: 12px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  background: none !important;
  border: none !important;
  color: var(--text-muted) !important;
  cursor: pointer !important;
  font-size: 0.9rem !important;
  padding: 4px !important;
}
[dir="rtl"] .mobile-search-clear {
  right: auto !important;
  left: 12px !important;
}

@media (max-width: 1024px) {
  .header-search-bar { max-width: 280px !important; }
  .header-nav-bar { overflow-x: auto !important; }
  .nav-bar-container { overflow-x: auto !important; }
}

@media (max-width: 768px) {
  body {
    overflow-x: hidden !important;
    font-size: 15px !important;
  }
  
  .site-header-wrapper {
    position: sticky !important;
    top: 0 !important;
    z-index: 9999 !important;
  }
  .header-top-bar {
    height: 52px !important;
    padding: 0.4rem 0.75rem !important;
    gap: 0.4rem !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: nowrap !important;
  }
  .mobile-menu-btn {
    display: inline-flex !important;
    flex-shrink: 0 !important;
    margin-right: 2px !important;
  }
  .mobile-search-toggle-btn {
    display: inline-flex !important;
    flex-shrink: 0 !important;
  }
  .nav-brand {
    flex: 1 1 auto !important;
    min-width: 0 !important;
    gap: 0.35rem !important;
    display: inline-flex !important;
    align-items: center !important;
  }
  .brand-logo-icon {
    width: 32px !important;
    height: 32px !important;
    font-size: 1.15rem !important;
    border-radius: 8px !important;
  }
  .brand-name {
    font-size: 0.95rem !important;
    max-width: 120px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  .brand-tag {
    font-size: 0.62rem !important;
    padding: 1px 4px !important;
  }
  .header-search-bar {
    display: none !important;
  }
  .header-nav-bar {
    display: none !important;
  }
  .header-actions {
    flex: 0 0 auto !important;
    gap: 5px !important;
    margin-left: auto !important;
  }
  .lang-btn {
    padding: 5px 6px !important;
    font-size: 0.78rem !important;
    gap: 3px !important;
  }
  .lang-btn .lang-text {
    display: none !important;
  }
  .lang-arrow {
    display: none !important;
  }
  .theme-toggle-btn {
    width: 32px !important;
    height: 32px !important;
    font-size: 0.95rem !important;
  }
  .lang-dropdown-menu {
    right: 0 !important;
    left: auto !important;
    width: min(200px, 85vw) !important;
  }
  [dir="rtl"] .lang-dropdown-menu {
    right: auto !important;
    left: 0 !important;
  }

  /* --- Page Containers & Breadcrumb --- */
  .tool-main-container,
  main {
    max-width: 100% !important;
    margin: 1rem auto !important;
    padding: 0 0.85rem !important;
    box-sizing: border-box !important;
  }
  .breadcrumb-nav {
    white-space: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    font-size: 0.8rem !important;
    margin-bottom: 1rem !important;
    padding-bottom: 2px !important;
  }
  .breadcrumb-nav::-webkit-scrollbar {
    display: none !important;
  }

  .hero-section {
    padding: 2rem 1rem 1.5rem 1rem !important;
  }
  .hero-section h1 {
    font-size: clamp(1.6rem, 5.5vw, 2.2rem) !important;
    line-height: 1.25 !important;
  }
  .hero-section p {
    font-size: 0.95rem !important;
    margin-bottom: 1.25rem !important;
  }
  .tool-intro-hero {
    padding: 1.25rem 1rem !important;
    border-radius: 10px !important;
    margin-bottom: 1.25rem !important;
  }
  .tool-intro-hero h1 {
    font-size: clamp(1.35rem, 5vw, 1.8rem) !important;
    line-height: 1.3 !important;
    word-break: break-word !important;
  }
  .tool-intro-hero p {
    font-size: 0.92rem !important;
    line-height: 1.55 !important;
  }

  .tool-interactive-workbench {
    padding: 1.25rem 1rem !important;
    border-radius: 10px !important;
    margin-bottom: 1.5rem !important;
  }
  .tool-interactive-workbench .calculator-app-container > div:first-child,
  .workbench-input-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
    margin-bottom: 1.25rem !important;
  }
  .input-group label {
    font-size: 0.9rem !important;
    margin-bottom: 0.35rem !important;
  }
  .input-group input,
  .input-group select {
    width: 100% !important;
    box-sizing: border-box !important;
    font-size: 1rem !important;
    padding: 9px 12px !important;
    height: 42px !important;
  }

  .workbench-actions,
  .tool-interactive-workbench div[style*="display:flex; gap:12px"],
  .tool-interactive-workbench div[style*="display: flex; gap: 12px"] {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
    margin-bottom: 1.25rem !important;
  }
  #calc-trigger-btn,
  #reset-trigger-btn,
  #copy-trigger-btn,
  .workbench-actions button,
  .tool-interactive-workbench button {
    width: 100% !important;
    min-height: 42px !important;
    padding: 8px 10px !important;
    font-size: 0.88rem !important;
    justify-content: center !important;
    text-align: center !important;
    box-sizing: border-box !important;
  }
  #calc-trigger-btn {
    grid-column: 1 / -1 !important;
    font-size: 1rem !important;
    font-weight: 800 !important;
  }

  #calc-result-box {
    padding: 1.25rem 1rem !important;
    border-radius: 10px !important;
  }
  #result-display-val {
    font-size: clamp(1.35rem, 5.2vw, 1.9rem) !important;
    word-break: break-word !important;
    overflow-wrap: anywhere !important;
  }
  #result-display-note {
    font-size: 0.82rem !important;
    line-height: 1.45 !important;
  }

  .tool-content-article section {
    padding: 1.25rem 1rem !important;
    border-radius: 10px !important;
    margin-bottom: 1.5rem !important;
  }
  .tool-content-article h2 {
    font-size: 1.25rem !important;
    line-height: 1.35 !important;
    margin-bottom: 0.75rem !important;
  }
  .tool-content-article h3 {
    font-size: 1.05rem !important;
  }
  .tool-content-article p,
  .tool-content-article li {
    font-size: 0.92rem !important;
    line-height: 1.65 !important;
  }

  .steps-grid,
  .precautions-grid,
  .tool-content-article div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    gap: 0.85rem !important;
  }

  .table-responsive,
  div[style*="overflow-x:auto"],
  div[style*="overflow-x: auto"] {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    border-radius: 8px !important;
    border: 1px solid var(--border-subtle) !important;
    margin-top: 0.75rem !important;
  }
  table {
    min-width: 520px !important;
    font-size: 0.82rem !important;
  }
  th, td {
    padding: 0.55rem 0.65rem !important;
  }

  .flagship-cards-grid,
  .hot-tools-grid,
  .related-tools-grid,
  div[style*="grid-template-columns: repeat(auto-fit, minmax(220px, 1fr))"],
  div[style*="grid-template-columns: repeat(auto-fit, minmax(320px, 1fr))"] {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }
  .category-hub-card {
    padding: 1.25rem 1rem !important;
  }

  footer {
    padding: 1.75rem 1rem !important;
    margin-top: 2.5rem !important;
    font-size: 0.82rem !important;
  }
}

@media (max-width: 420px) {
  .brand-name {
    max-width: 130px !important;
    font-size: 0.95rem !important;
  }
  .tool-intro-hero h1 {
    font-size: 1.35rem !important;
  }
  #result-display-val {
    font-size: 1.35rem !important;
  }
}