/* Meloop mobile-native layer
   This stylesheet is intentionally inert above 768px. It exists separately
   from the Study Studio layer so phone-only UX can evolve without desktop drift. */
@media (max-width: 768px) {
  :root {
    --meloop-mobile-gutter: 14px;
    --meloop-mobile-touch: 44px;
  }

  html,
  body {
    background: var(--studio-paper, #f6f4ee);
    -webkit-tap-highlight-color: transparent;
    overflow-x: hidden !important;
    overscroll-behavior-x: none !important;
    overscroll-behavior: none !important;
    width: 100% !important;
    max-width: 100vw !important;
  }

  body {
    min-height: 100dvh;
  }

  /* Desktop visual atmosphere completely inert on mobile */
  .meloop-ambient-glow,
  .oz-cursor-glow {
    display: none !important;
  }

  /* Safe-area header placement clearing notch and dynamic island */
  .floating-nav-wrapper {
    padding-top: max(48px, calc(env(safe-area-inset-top, 44px) + 8px)) !important;
  }

  /* Keep every interactive control at a real touch target size. */
  button,
  [role="button"],
  .island-link,
  .chain-difficulty-btn,
  .palette-btn {
    min-height: var(--meloop-mobile-touch);
  }

  /* Hub cards stay fully inside the phone viewport; never let the second column bleed. */
  .mobbin-cards-grid,
  #games-hub .mobbin-cards-grid,
  #study-hub .mobbin-cards-grid,
  #quiz .mobbin-cards-grid,
  #quizHubModesGrid {
    width: 100% !important;
    max-width: none !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) !important;
    gap: 10px !important;
    box-sizing: border-box !important;
  }

  .mobbin-card,
  #games-hub .mobbin-card,
  #study-hub .mobbin-card,
  #quiz .mobbin-card {
    min-width: 0 !important;
  }

  /* The lobby becomes one clear task flow rather than a compressed web panel. */
  .game-container,
  .exam-container,
  .practice-container,
  .study-hub-container {
    width: calc(100% - (var(--meloop-mobile-gutter) * 2)) !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding: 18px 14px 28px !important;
    border-radius: 22px !important;
    box-sizing: border-box !important;
  }

  .chain-game-header,
  .lobby-game-header,
  .exam-lobby-header {
    padding: 4px 2px 14px !important;
    text-align: left !important;
  }

  .chain-game-header h2,
  .lobby-game-header h2,
  .exam-lobby-header h2 {
    font-size: clamp(22px, 6vw, 28px) !important;
    line-height: 1.1 !important;
    letter-spacing: -0.035em !important;
  }

  .chain-desc,
  .lobby-game-header p,
  .exam-lobby-header p {
    max-width: 34ch;
    font-size: 13px !important;
    line-height: 1.45 !important;
  }

  /* Settings remain deliberate; a three-up card grid was the main source of crowding. */
  .chain-difficulty-tabs,
  .lobby-options-grid,
  .exam-mode-grid {
    grid-auto-flow: column !important;
    grid-auto-columns: minmax(124px, 42vw) !important;
    grid-template-columns: none !important;
    overflow-x: auto !important;
    overscroll-behavior-x: contain;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    margin-left: -2px !important;
    margin-right: -2px !important;
    padding: 2px 2px 8px !important;
  }

  .chain-difficulty-tabs::-webkit-scrollbar,
  .lobby-options-grid::-webkit-scrollbar,
  .exam-mode-grid::-webkit-scrollbar {
    display: none;
  }

  .chain-difficulty-btn {
    scroll-snap-align: start;
    min-height: 76px !important;
    padding: 11px 10px !important;
    border-radius: 16px !important;
  }

  .chain-difficulty-btn.active {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--studio-forest, #125b48) 22%, transparent) !important;
  }

  .chain-rules-card,
  .chain-rules {
    grid-template-columns: 1fr !important;
    gap: 8px !important;
    padding: 0 !important;
    background: transparent !important;
    border: 0 !important;
  }

  .chain-rules-card .rule-item,
  .chain-rules .rule-item {
    display: grid !important;
    grid-template-columns: 28px 1fr !important;
    align-items: center !important;
    column-gap: 10px !important;
    min-height: 52px !important;
    padding: 10px 12px !important;
    border-radius: 14px !important;
  }

  .btn-start,
  .btn-start-chain,
  #startQuiz,
  #startEndless,
  #btnStartMatchGame,
  #btnStartMemoryGame {
    position: sticky;
    bottom: max(12px, env(safe-area-inset-bottom));
    z-index: 20;
    min-height: 54px !important;
    border-radius: 17px !important;
    box-shadow: 0 12px 26px color-mix(in srgb, var(--studio-forest, #125b48) 24%, transparent) !important;
  }

  /* Session HUD: back is a 44px icon target; metrics may scroll instead of clipping. */
  .blitz-topbar {
    display: grid !important;
    grid-template-columns: var(--meloop-mobile-touch) minmax(0, 1fr) !important;
    gap: 8px !important;
    min-height: 60px !important;
    padding: 8px !important;
    border-radius: 18px !important;
    overflow: visible !important;
  }

  .blitz-exit-btn {
    width: var(--meloop-mobile-touch) !important;
    height: var(--meloop-mobile-touch) !important;
    min-height: var(--meloop-mobile-touch) !important;
    padding: 0 !important;
    border-radius: 14px !important;
    font-size: 0 !important;
    line-height: 1 !important;
  }

  .blitz-exit-btn::after {
    content: "‹";
    font-size: 32px;
    font-weight: 400;
    line-height: 0.7;
  }

  .blitz-stats-group {
    min-width: 0 !important;
    justify-content: flex-start !important;
    gap: 6px !important;
    padding-right: 2px !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .blitz-stats-group::-webkit-scrollbar { display: none; }

  .blitz-stat-box,
  .blitz-topbar .btn-joker-step,
  .blitz-topbar .btn-tool-sm {
    min-height: 36px !important;
    padding: 5px 10px !important;
    flex: 0 0 auto !important;
    font-size: 11px !important;
  }

  /* Exam status separates priority information from the long question palette. */
  .exam-topbar {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) auto !important;
    gap: 8px !important;
    padding: 10px !important;
    border-radius: 18px !important;
  }

  .exam-progress-info {
    min-width: 0;
    font-size: 12px !important;
    line-height: 1.25 !important;
  }

  .exam-timer-box {
    min-height: 38px;
    padding: 4px 10px !important;
  }

  .exam-palette {
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    padding: 8px !important;
    border-radius: 16px !important;
  }

  .exam-palette::-webkit-scrollbar { display: none; }

  .palette-btn {
    flex: 0 0 38px;
    width: 38px !important;
    height: 38px !important;
    min-height: 38px !important;
    border-radius: 12px !important;
  }

  .exam-question-card {
    padding: 18px 14px !important;
    border-radius: 20px !important;
  }

  .exam-option-card {
    min-height: 56px;
    padding: 12px !important;
    border-radius: 15px !important;
  }

  .exam-footer-nav {
    position: sticky;
    bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 10;
    padding: 10px 0 2px !important;
    background: linear-gradient(to bottom, transparent, var(--studio-paper, #f6f4ee) 24%);
  }

  /* Leaderboard is an occasional destination, not a dense always-on score wall. */
  .leaderboard-podium {
    overflow-x: auto;
    overscroll-behavior-x: contain;
    padding: 2px 2px 8px;
    scrollbar-width: none;
  }

  .leaderboard-podium::-webkit-scrollbar { display: none; }

  .podium-wrapper {
    min-width: 328px;
  }

  .leaderboard-row {
    min-height: 54px !important;
    padding: 9px 10px !important;
  }

  /* Native-feeling feedback without desktop hover behavior. */
  .option-btn:active,
  .exam-option-card:active,
  .chain-difficulty-btn:active,
  .leaderboard-row:active {
    transform: scale(0.985) !important;
  }

  @media (max-width: 360px) {
    .game-container,
    .exam-container,
    .practice-container,
    .study-hub-container {
      width: calc(100% - 20px) !important;
      padding-left: 10px !important;
      padding-right: 10px !important;
    }

    .blitz-stat-box,
    .blitz-topbar .btn-joker-step,
    .blitz-topbar .btn-tool-sm {
      font-size: 10px !important;
      padding: 5px 8px !important;
    }
  }

  /* 📖 Dictionary mobile-native clean layout */
  .screen#dictionary.active:not(.has-results) {
    min-height: calc(100dvh - 120px) !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    padding: 0 14px !important;
  }

  .screen#dictionary.active.has-results {
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: center !important;
    padding-top: 10px !important;
    padding-bottom: 30px !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }

  .dict-search-box input {
    font-size: 16px !important; /* 16px prevents iOS auto-zoom */
  }

  .dict-autocomplete-dropdown {
    display: none !important;
  }
}