/* ══════════════════════════════════════════════════════
   ToolHub 5D — Android Mobile Responsive Improvements
   Targets: max-width 768px (tablets) and 480px (phones)
   Desktop/tablet ≥769px: UNTOUCHED
   ══════════════════════════════════════════════════════ */

/* ── MOBILE SEARCH BAR (below header) ── */
#mobile-search-bar {
  display: none;
  position: fixed;
  top: var(--navbar-h);
  left: 0;
  right: 0;
  z-index: 999;
  padding: 8px 12px;
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}
#mobile-search-bar .search-container {
  position: relative;
  display: flex;
  align-items: center;
}
#mobile-search-bar .search-icon {
  position: absolute;
  left: 12px;
  font-size: 0.9rem;
  pointer-events: none;
  z-index: 1;
}
#mobile-search-input {
  width: 100%;
  padding: 10px 44px 10px 38px;
  background: var(--glass2);
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
  transition: var(--tr);
}
#mobile-search-input:focus {
  border-color: var(--indigo);
  background: var(--card);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
#mobile-search-input::placeholder { color: var(--text3); }
#mobile-voice-btn {
  position: absolute;
  right: 10px;
  background: none;
  color: var(--text3);
  font-size: 1rem;
  padding: 4px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
#mobile-voice-btn:hover { color: var(--indigo); }
#mobile-search-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--card);
  border: 1px solid var(--border-h);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-xl);
  z-index: 2100;
  max-height: 320px;
  overflow-y: auto;
}
#mobile-search-dropdown.show { display: block; }

/* ── FLOATING SI ASSISTANT BUTTON ── */
#floating-si-btn {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 20px;
  z-index: 1500;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--indigo), var(--purple));
  border: none;
  box-shadow: 0 4px 20px rgba(99,102,241,0.5), 0 0 0 0 rgba(99,102,241,0.3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  transition: var(--tr-b);
  animation: si-pulse-ring 3s ease-in-out infinite;
  -webkit-tap-highlight-color: transparent;
}
#floating-si-btn:active { transform: scale(0.92); }
@keyframes si-pulse-ring {
  0%,100% { box-shadow: 0 4px 20px rgba(99,102,241,0.5), 0 0 0 0 rgba(99,102,241,0.3); }
  50% { box-shadow: 0 4px 20px rgba(99,102,241,0.6), 0 0 0 10px rgba(99,102,241,0); }
}
#floating-si-btn .si-tooltip {
  display: none;
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 6px 12px;
  font-size: 0.78rem;
  white-space: nowrap;
  color: var(--text);
  box-shadow: var(--sh-md);
  pointer-events: none;
}

/* ════════════════════════════════════════
   TABLET — max-width 768px
   ════════════════════════════════════════ */
@media (max-width: 768px) {

  /* ── FLOATING SI BUTTON ── */
  #floating-si-btn { display: flex; }

  /* ── SHOW MOBILE SEARCH BAR ── */
  #mobile-search-bar { display: block; }

  /* ── ADJUST MAIN CONTENT TOP for mobile search bar ── */
  :root { --mobile-search-h: 52px; }
  #main-content {
    padding-top: calc(var(--navbar-h) + var(--mobile-search-h)) !important;
  }

  /* ── NAVBAR: hide desktop search, hide AI btn text, hide sign in/up ── */
  .navbar-search-wrap { display: none !important; }
  .nav-ai-btn { display: none !important; }
  .nav-auth-btns { display: none !important; }

  /* Keep only: hamburger, logo, theme toggle, notif, avatar */
  .navbar-actions {
    gap: 4px;
    margin-left: auto;
  }
  .nav-icon-btn {
    width: 40px;
    height: 40px;
    min-height: 48px;
    flex-shrink: 0;
  }

  /* ── NAVBAR COMPACT ── */
  #navbar {
    padding: 0 10px;
    gap: 8px;
  }
  .nav-logo-text { font-size: 1rem; }
  .nav-logo-5d { font-size: 0.7rem; }

  /* ── HERO SECTION — compact ── */
  .hero-section {
    flex-direction: column;
    padding: 1rem 0 1rem;
    min-height: auto;
    gap: 0.75rem;
    align-items: center;
    text-align: center;
  }
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero-badge {
    font-size: 0.72rem;
    padding: 5px 12px;
    margin-bottom: 0.6rem;
  }
  .hero-title { margin-bottom: 0.6rem; }
  .hero-title-line1 { font-size: clamp(1.5rem, 7vw, 2rem); }
  .hero-title-line2 { font-size: clamp(1.2rem, 6vw, 1.7rem); }
  .hero-subtitle {
    font-size: 0.88rem;
    margin-bottom: 1rem;
    max-width: 100%;
    text-align: center;
  }
  .hero-cta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .btn-primary-glow,
  .btn-secondary-glow {
    min-height: 48px;
    padding: 12px 20px;
    font-size: 0.88rem;
    justify-content: center;
    flex: 1;
    min-width: 130px;
    max-width: 200px;
  }
  /* Android download button — full width below the two buttons */
  .btn-android-download {
    width: 100%;
    justify-content: center;
    padding: 13px 20px;
    font-size: 0.9rem;
    min-height: 48px;
    order: 3; /* always last in the flex row */
    margin-top: 2px;
  }
  /* Show the 5D cube under the buttons on mobile (not absolutely positioned, no overlap) */
  .hero-section { flex-direction: column !important; }
  .hero-visual {
    display: block !important;
    position: static !important;
    width: 170px !important;
    height: 170px !important;
    margin: 18px auto 28px !important;
    order: 4;
  }
  .hero-cube-wrap { position: static !important; transform: none !important; }
  .hero-cube { width: 170px !important; height: 170px !important; margin: 0 auto; }
  .cube-face { width: 170px !important; height: 170px !important; }
  .cube-face.front  { transform: translateZ(85px) !important; }
  .cube-face.back   { transform: rotateY(180deg) translateZ(85px) !important; }
  .cube-face.left   { transform: rotateY(-90deg) translateZ(85px) !important; }
  .cube-face.right  { transform: rotateY(90deg) translateZ(85px) !important; }
  .cube-face.top    { transform: rotateX(90deg) translateZ(85px) !important; }
  .cube-face.bottom { transform: rotateX(-90deg) translateZ(85px) !important; }
  /* Floating icons would clutter a small mobile card, hide just those */
  .hero-floating-icons { display: none !important; }

  /* Contain orbs so they don't bleed below hero content on mobile */
  .orb-1 { width: 280px; height: 280px; top: -120px; left: -120px; opacity: 0.5; }
  .orb-2 { width: 250px; height: 250px; bottom: auto; top: 60%; right: -80px; opacity: 0.4; }
  .orb-3 { width: 200px; height: 200px; top: 30%; opacity: 0.35; }
  .orb-4 { display: none; }

  /* ── STATS BAR ── */
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    margin-bottom: 1rem;
  }
  .stat-item { padding: 0.85rem 0.6rem; }
  .stat-icon { font-size: 1.2rem; }
  .stat-num { font-size: 1.1rem; }
  .stat-desc { font-size: 0.7rem; }

  /* ── CATEGORY SCROLL — sticky + snap ── */
  .cat-scroll-wrap {
    position: sticky;
    top: calc(var(--navbar-h) + var(--mobile-search-h));
    z-index: 90;
    background: var(--bg);
    margin-bottom: 1rem;
    margin-left: -1rem;
    margin-right: -1rem;
    padding: 8px 1rem;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .cat-scroll-wrap::-webkit-scrollbar { display: none; }
  .cat-scroll {
    display: flex;
    gap: 8px;
    padding-bottom: 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  .cat-chip {
    scroll-snap-align: start;
    flex-shrink: 0;
    min-height: 36px;
    padding: 7px 14px;
    font-size: 0.8rem;
    border-radius: 99px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* ── TOOL CARDS — 2 per row on tablets ── */
  .tools-grid,
  .tools-grid-full {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .tool-card {
    padding: 1rem;
    border-radius: var(--r-md);
    min-height: 130px;
    /* Equal card height via grid alignment */
    display: flex;
    flex-direction: column;
  }
  .tool-card:hover { transform: none; }
  .tool-card:active {
    transform: scale(0.97);
    background: var(--card-hover);
    transition: transform 0.1s ease;
  }
  .tc-icon { font-size: 1.5rem; }
  .tc-name { font-size: 0.82rem; }
  .tc-desc { font-size: 0.72rem; line-height: 1.4; }
  .tc-open-btn {
    min-height: 32px;
    padding: 5px 10px;
    font-size: 0.72rem;
  }
  .tc-fav { opacity: 0.6; } /* always show on touch devices */

  /* ── GAMES GRID ── */
  .games-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .game-card {
    padding: 1rem;
    min-height: 48px;
    border-radius: var(--r-md);
  }
  .game-card:hover { transform: none; }
  .game-card:active { transform: scale(0.97); }
  .game-card-icon { font-size: 2.2rem; }
  .game-card-name { font-size: 0.85rem; }
  .game-card-desc { font-size: 0.7rem; }
  .game-card-btn {
    min-height: 36px;
    padding: 8px 14px;
    font-size: 0.76rem;
  }

  /* ── GAMES SCROLL (horizontal) ── */
  .games-scroll {
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: 6px;
    scrollbar-width: none;
  }
  .games-scroll::-webkit-scrollbar { display: none; }
  .game-thumb {
    scroll-snap-align: start;
    width: 90px;
    padding: 0.75rem;
    min-height: 80px;
    touch-action: manipulation;
  }
  .game-thumb:active { transform: scale(0.95); }
  .gt-img { font-size: 1.8rem; }
  .gt-name { font-size: 0.7rem; }

  /* ── AI BANNER ── */
  .ai-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    gap: 0.75rem;
  }
  .ai-banner-right {
    width: 100%;
    display: flex;
    justify-content: flex-end;
  }
  .ai-ask-btn {
    min-height: 44px;
    width: 100%;
    text-align: center;
    font-size: 0.9rem;
  }

  /* ── DOUBLE GRID ── */
  .double-grid { grid-template-columns: 1fr; gap: 1rem; }

  /* ── PAGE PADDING ── */
  .page { padding: 1rem !important; }

  /* ── SECTION WRAP ── */
  .section-wrap { margin-bottom: 1.5rem; }
  .section-title { font-size: 1rem; }

  /* ── SEARCH DROPDOWN in mobile-search-bar ── */
  .search-dropdown {
    left: 12px;
    right: 12px;
    top: calc(100% + 6px);
    max-height: 280px;
  }

  /* ── GAME CANVAS WRAP ── */
  .game-canvas-wrap { border-radius: var(--r-lg); overflow: hidden; }
  .game-view-wrap { padding-bottom: 80px; } /* space for floating SI btn */

  /* ── GAME CONTROL BUTTONS (larger tap targets) ── */
  .game-control-btn {
    min-height: 48px;
    padding: 10px 22px;
    font-size: 0.9rem;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  /* ── PAGE HEADER ── */
  .page-header-row { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
  .page-heading { font-size: 1.2rem; }

  /* ── FEEDBACK TABS ── */
  .feedback-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    gap: 6px;
    padding-bottom: 4px;
  }
  .feedback-tabs::-webkit-scrollbar { display: none; }
  .fb-tab {
    flex-shrink: 0;
    min-height: 40px;
    white-space: nowrap;
    font-size: 0.82rem;
  }

  /* ── AI CHAT ── */
  .ai-chat-wrap { height: calc(100vh - var(--navbar-h) - var(--mobile-search-h) - 2rem); }
  .ai-quick-prompts { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .ai-quick-prompts::-webkit-scrollbar { display: none; }
  .ai-quick-prompts span {
    flex-shrink: 0;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
  }

  /* ── PWA BANNER ── */
  .pwa-banner { margin: 0 0.5rem; border-radius: var(--r-md); }

  /* ── MODAL ── */
  .modal-card { margin: 1rem; border-radius: var(--r-xl); max-height: 85vh; overflow-y: auto; }

  /* ── UPGRADE MODAL ── */
  .upgrade-card { padding: 1.5rem; }

  /* ── SIDEBAR IMPROVEMENTS ── */
  .sidebar-item { min-height: 48px; }
  .sidebar-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
  }

  /* ── TOOL VIEW PAGE ── */
  .tool-page-header { flex-direction: column; align-items: flex-start; }
  .tool-page-icon { width: 50px; height: 50px; font-size: 1.6rem; }

  /* ── BUTTONS GENERAL ── */
  .btn-primary-glow,
  .btn-secondary-glow,
  .btn-outline-glow {
    min-height: 48px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  /* ── SNAKE GAME canvas ── */
  #snake-canvas {
    max-width: 100%;
    height: auto;
  }

  /* ── LUDO CANVAS ── */
  #ludo-canvas {
    width: 100% !important;
    height: auto !important;
    max-width: 380px;
    touch-action: none;
  }
  #ludo-dice-canvas { flex-shrink: 0; }

  /* ── SNAKE & LADDER BOARD ── */
  #sl-board {
    max-width: 100% !important;
  }

  /* ── HIDDEN: floating icons in hero ── */
  .fi { display: none; }

  /* ── DISABLE hover effects on touch devices ── */
  @media (hover: none) {
    .tool-card:hover { transform: none; box-shadow: none; border-color: var(--border); }
    .game-card:hover { transform: none; box-shadow: none; }
    .game-thumb:hover { transform: none; box-shadow: none; }
    .btn-primary-glow:hover { transform: none; }
    .btn-secondary-glow:hover { transform: none; }
    .cat-chip:hover { background: var(--glass2); border-color: var(--border); color: var(--text2); }
    .cat-chip.active { background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(139,92,246,0.1)); border-color: var(--indigo); color: #818cf8; }
    .game-control-btn:hover { transform: none; }
    .upgrade-btn:hover { transform: none; }
  }

  /* ── PERFORMANCE: reduce animations on mobile ── */
  /* Slow down orb animations for battery saving */
  .orb { animation-duration: 45s; }
  #particle-canvas { opacity: 0.2; }
}

/* ════════════════════════════════════════
   SMALL PHONES — max-width 480px
   ════════════════════════════════════════ */
@media (max-width: 480px) {

  /* ── TOOL CARDS: 2 per row on larger phones, stays 2 ── */
  .tools-grid,
  .tools-grid-full {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .tool-card { padding: 0.85rem; min-height: 120px; }
  .tc-icon { font-size: 1.4rem; }
  .tc-name { font-size: 0.78rem; }
  .tc-desc { font-size: 0.68rem; }

  /* ── GAMES GRID: 2 per row ── */
  .games-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }

  /* ── STATS BAR ── */
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 1px; }
  .stat-item { padding: 0.65rem 0.5rem; }
  .stat-icon { font-size: 1rem; }
  .stat-num { font-size: 1rem; }
  .stat-desc { font-size: 0.65rem; }

  /* ── HERO ── */
  .hero-section { padding: 0.75rem 0; gap: 0.5rem; }
  .hero-title-line1 { font-size: clamp(1.3rem, 7.5vw, 1.7rem); }
  .hero-title-line2 { font-size: clamp(1.1rem, 6.5vw, 1.4rem); }
  .hero-subtitle { font-size: 0.82rem; margin-bottom: 0.8rem; }
  .hero-cta { gap: 8px; }
  .btn-primary-glow, .btn-secondary-glow {
    font-size: 0.82rem;
    padding: 10px 16px;
    min-width: 110px;
  }
  .btn-android-download {
    font-size: 0.82rem;
    padding: 11px 16px;
    width: 100%;
    justify-content: center;
  }

  /* ── PAGE ── */
  .page { padding: 0.75rem !important; }

  /* ── CATEGORY CHIPS ── */
  .cat-chip { font-size: 0.76rem; padding: 6px 12px; }

  /* ── SECTION HEADER ── */
  .section-title { font-size: 0.95rem; }
  .view-all-btn { font-size: 0.78rem; }

  /* ── AI CHAT ── */
  #ai-chat-input { font-size: 0.88rem; }
  .ai-model-select { font-size: 0.78rem; }

  /* ── GAME CONTROL BUTTONS ── */
  .game-control-btn { font-size: 0.85rem; min-height: 44px; padding: 8px 16px; }

  /* ── LUDO SETUP BUTTONS ── */
  #ludo-setup button { min-height: 44px; font-size: 0.9rem !important; padding: 8px 18px !important; }

  /* ── FLOATING SI ── */
  #floating-si-btn { width: 52px; height: 52px; font-size: 1.3rem; bottom: 20px; right: 16px; }
}

/* ════════════════════════════════════════
   VERY SMALL PHONES — max-width 360px
   (1-card per row)
   ════════════════════════════════════════ */
@media (max-width: 360px) {
  .tools-grid,
  .tools-grid-full {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .games-grid { grid-template-columns: 1fr; }
  .hero-title-line1 { font-size: 1.3rem; }
  .hero-title-line2 { font-size: 1.1rem; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

/* ════════════════════════════════════════
   LUDO & SNAKE LADDER — Portrait mode
   ════════════════════════════════════════ */
@media (max-width: 768px) and (orientation: portrait) {
  #ludo-canvas {
    width: min(100%, 360px) !important;
    height: auto !important;
  }
  .game-canvas-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem;
  }
  #sl-board {
    max-width: min(100%, 340px) !important;
    margin: 0 auto 0.6rem;
  }
  /* Ludo dice row */
  #ludo-game > div:nth-child(3) {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  /* Ludo info row */
  #ludo-info { padding: 0 0.5rem; }
}

/* ════════════════════════════════════════
   SAFE AREA (Android/iOS notch support)
   ════════════════════════════════════════ */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  #floating-si-btn {
    bottom: calc(24px + env(safe-area-inset-bottom));
  }
  .pwa-banner {
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
  }
  .ai-chat-input-wrap {
    padding-bottom: calc(1rem + env(safe-area-inset-bottom));
  }
}

/* ════════════════════════════════════════
   LAZY-LOAD FADE IN (performance)
   ════════════════════════════════════════ */
.lazy-section {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  will-change: opacity, transform;
}
.lazy-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ════════════════════════════════════════
   ACCESSIBILITY — Larger tap targets
   ════════════════════════════════════════ */
@media (max-width: 768px) {
  /* All interactive elements get minimum 44px touch target */
  .sidebar-item,
  .cat-chip,
  .game-control-btn,
  .btn-primary-glow,
  .btn-secondary-glow,
  .btn-outline-glow,
  .fb-tab,
  .view-all-btn,
  .nav-icon-btn,
  .hamburger-btn,
  .tc-open-btn {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  /* Better text readability on mobile */
  body { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
  .tc-desc, .tc-name, .game-card-desc, .game-card-name {
    -webkit-font-smoothing: antialiased;
  }

  /* Input fields - bigger font to prevent iOS zoom */
  input, select, textarea {
    font-size: 16px !important; /* prevents iOS auto-zoom */
  }
  #mobile-search-input { font-size: 16px !important; }

  /* Increase line height for readability */
  .hero-subtitle, .page-subheading { line-height: 1.65; }

  /* No overflow on any child element */
  * { max-width: 100%; }
  img, canvas { max-width: 100%; }
}