/**
 * Sam Kido - Giao Diện Siêu Mượt Tối Ưu Hóa 100% Cho iPhone, iPad & Thiết Bị Di Động
 */

/* ================= 1. THIẾT LẬP TOÀN CỤC CHO MOBILE & IPHONE ================= */
html, body {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* ================= 2. RESPONSIVE CHO TABLET & MOBILE (< 768px) ================= */
@media (max-width: 768px) {
  /* Layout tổng thể */
  .app-viewport {
    padding: 12px 10px calc(80px + env(safe-area-inset-bottom, 15px)) 10px;
    max-width: 100%;
  }

  /* Top Navbar */
  .top-navbar {
    padding: max(8px, env(safe-area-inset-top, 8px)) 12px 8px 12px;
    gap: 8px;
    justify-content: space-between;
  }

  .brand-logo {
    gap: 6px;
  }

  .brand-title {
    font-size: 1.25rem;
  }

  .logo-badge {
    font-size: 1.8rem;
  }

  .user-profile-badge {
    padding: 4px 8px;
    gap: 6px;
  }

  .profile-avatar-wrapper {
    width: 34px;
    height: 34px;
    font-size: 1.2rem;
  }

  .profile-name {
    font-size: 0.82rem;
    max-width: 65px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .profile-age-badge {
    display: none;
  }

  .profile-edit-btn {
    font-size: 0.85rem;
  }

  .user-stats-bar {
    gap: 6px;
  }

  .stat-pill {
    padding: 5px 10px;
    font-size: 0.85rem;
    gap: 4px;
  }

  .rank-pill {
    display: none; /* Ẩn bớt danh hiệu dài trên topbar mobile để tránh chật chội */
  }

  .header-actions {
    display: none; /* Điều hướng được chuyển xuống thanh bottom navigation */
  }

  /* Bottom Navigation Bar chuẩn iOS */
  .mobile-bottom-nav {
    display: flex !important;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1.5px solid rgba(226, 232, 240, 0.85);
    box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.08);
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom, 12px)) 8px;
    justify-content: space-around;
    align-items: center;
  }

  .b-nav-item {
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: #64748B;
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 800;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 14px;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    -webkit-user-select: none;
    user-select: none;
  }

  .b-nav-item .b-nav-icon {
    font-size: 1.45rem;
    transition: transform 0.2s;
  }

  .b-nav-item.active {
    color: #FF4757;
    background: #FFF1F2;
  }

  .b-nav-item.active .b-nav-icon {
    transform: scale(1.18);
  }

  /* Banner Chào Bé & Khám Phá */
  .mascot-hero-section {
    flex-direction: row;
    padding: 10px 14px;
    gap: 10px;
    margin: 4px auto 14px;
    text-align: left;
    border-radius: 20px;
  }

  .mascot-avatar {
    font-size: 2rem;
  }

  .mascot-bubble h2 {
    font-size: 0.95rem;
    margin-bottom: 2px;
  }

  .mascot-bubble p {
    font-size: 0.82rem;
    line-height: 1.35;
  }

  .home-map-cta-banner {
    padding: 14px 12px;
    border-radius: 20px;
    margin-bottom: 16px;
  }

  .cta-banner-content h3 {
    font-size: 1.15rem;
  }

  .cta-banner-content p {
    font-size: 0.82rem;
  }

  .btn-launch-map-quest {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  /* Lưới Chuyên Mục Học Tập */
  .categories-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .category-card {
    padding: 16px 14px;
    border-radius: 22px;
  }

  .category-icon {
    font-size: 2.4rem;
  }

  .category-title {
    font-size: 1.25rem;
  }

  .category-desc {
    font-size: 0.85rem;
    line-height: 1.35;
  }

  /* Tiêu Đề Màn Chơi & Nút Quay Về */
  .view-top-header {
    padding: 4px 0 10px 0;
    margin-bottom: 8px;
    gap: 8px;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .btn-back-home {
    padding: 7px 14px;
    font-size: 0.86rem;
    border-radius: 50px;
    white-space: nowrap;
  }

  .view-heading {
    font-size: 1.2rem;
    font-weight: 800;
    text-align: center;
  }

  /* Thanh Tab Chuyển Đổi Dạng Carousel Vuốt Ngang Mượt Mà */
  .game-tabs-nav {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    padding: 4px 4px 10px 4px;
    margin-bottom: 12px;
  }

  .game-tabs-nav::-webkit-scrollbar {
    display: none;
  }

  .tab-btn {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 8px 16px;
    font-size: 0.88rem;
    border-radius: 50px;
  }

  /* Bộ Chọn Cấp Độ Vuốt Ngang */
  .difficulty-selector {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 6px;
    padding: 4px 2px 10px 2px;
    justify-content: flex-start;
    margin-bottom: 10px;
  }

  .difficulty-selector::-webkit-scrollbar {
    display: none;
  }

  .difficulty-btn {
    flex: 0 0 auto;
    padding: 6px 12px;
    font-size: 0.82rem;
    border-radius: 16px;
    white-space: nowrap;
  }

  /* Thẻ Trò Chơi Chính */
  .game-card {
    padding: 16px 12px;
    border-radius: 22px;
    border-width: 3px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }

  .game-header {
    gap: 6px;
    margin-bottom: 10px;
  }

  .game-badge {
    font-size: 0.82rem;
    padding: 5px 10px;
  }

  .voice-btn {
    font-size: 0.82rem;
    padding: 5px 12px;
    border-radius: 16px;
  }

  .section-instruction {
    font-size: 0.85rem;
    margin-bottom: 12px;
    line-height: 1.4;
  }

  .game-question {
    font-size: 1.25rem;
    line-height: 1.42;
    margin: 12px 0 16px 0;
    padding: 0 4px;
  }

  /* Lưới Nút Chọn Đáp Án Cảm Ứng Lớn */
  .options-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .option-btn {
    min-height: 58px;
    font-size: 1.35rem;
    padding: 10px 6px;
    border-radius: 18px;
    border-width: 3px;
  }

  .option-btn.text-long {
    font-size: 1.05rem;
    line-height: 1.3;
  }

  /* Phân Hệ Tiếng Việt & Bảng Chữ Cái */
  .alphabet-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }

  .letter-card {
    padding: 12px 4px;
    border-radius: 16px;
  }

  .letter-main {
    font-size: 1.6rem;
  }

  .letter-icon {
    font-size: 1.2rem;
  }

  .letter-word {
    font-size: 0.78rem;
  }

  /* Phân Hệ Trí Não & Mê Cung & Đấu Trí 2 Người */
  .memory-grid {
    gap: 6px;
    max-width: 100%;
    margin: 0 auto 14px;
  }

  .grid-4 { grid-template-columns: repeat(2, 1fr); max-width: 200px; }
  .grid-8 { grid-template-columns: repeat(4, 1fr); max-width: 360px; }
  .grid-12 { grid-template-columns: repeat(3, 1fr); max-width: 360px; }
  .grid-16 { grid-template-columns: repeat(4, 1fr); max-width: 360px; }
  .grid-20 { grid-template-columns: repeat(4, 1fr); max-width: 360px; }
  .grid-24 { grid-template-columns: repeat(4, 1fr); max-width: 360px; }

  .memory-card {
    height: 72px;
    border-radius: 12px;
  }

  .grid-20 .memory-card, .grid-24 .memory-card {
    height: 62px;
  }

  .card-front {
    font-size: 1.3rem;
    border-radius: 12px;
  }

  .card-back {
    border-radius: 12px;
  }

  .card-back .card-icon {
    font-size: 1.3rem;
  }

  .card-back .card-name {
    font-size: 0.68rem;
    line-height: 1.1;
  }

  .versus-live-scoreboard {
    gap: 6px;
  }

  .player-score-card {
    padding: 8px 10px;
    gap: 8px;
    border-radius: 16px;
  }

  .player-avatar-box {
    width: 34px;
    height: 34px;
  }

  .score-avatar-emoji {
    font-size: 1.3rem;
  }

  .player-name {
    font-size: 0.78rem;
  }

  .player-pairs-count {
    font-size: 0.95rem;
  }

  .vs-badge {
    font-size: 0.82rem;
    padding: 4px 8px;
  }

  .versus-turn-banner {
    font-size: 0.8rem;
    padding: 6px 10px;
  }

  .pvp-battle-arena {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .pvp-question-title {
    font-size: 1.12rem;
  }

  .pvp-question-visual {
    font-size: 1.4rem;
  }

  .btn-pvp-ans {
    padding: 10px 8px;
    font-size: 0.95rem;
    min-height: 48px;
  }

  .caro-board-container.size-3 {
    max-width: 280px;
  }

  .caro-board-container.size-5 {
    max-width: 340px;
    gap: 5px;
    padding: 8px;
  }

  .caro-cell-symbol {
    font-size: 1.8rem;
  }

  .caro-board-container.size-5 .caro-cell-symbol {
    font-size: 1.3rem;
  }

  .shadow-match-arena {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .maze-grid {
    gap: 3px;
    max-width: 340px;
    margin: 0 auto;
  }

  .maze-cell {
    width: calc((100vw - 64px) / 7);
    height: calc((100vw - 64px) / 7);
    max-width: 44px;
    max-height: 44px;
    font-size: 1.3rem;
  }

  .maze-dpad {
    margin-top: 14px;
    gap: 8px;
  }

  .dpad-btn {
    width: 54px;
    height: 54px;
    font-size: 1.5rem;
    border-radius: 18px;
  }

  .character-picker-grid {
    gap: 8px;
  }

  .char-option-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  /* Phân Hệ Họa Sĩ Nhí & Tô Màu */
  .coloring-canvas-container {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .coloring-interactive-box, .svg-coloring-box {
    padding: 10px 8px;
    border-radius: 20px;
    border-width: 4px;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .coloring-interactive-canvas {
    width: 100% !important;
    max-width: 100% !important;
    max-height: 48vh !important;
    height: auto !important;
    object-fit: contain !important;
    border-radius: 14px;
    display: block;
    margin: 0 auto;
    touch-action: none;
  }

  .svg-coloring-art {
    width: 100% !important;
    max-width: 100% !important;
    max-height: 46vh !important;
    height: auto !important;
    display: block;
    margin: 0 auto;
  }

  .color-palette {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    padding: 6px 10px;
    background: #F8FAFC;
    border-radius: 50px;
    border: 2px solid #E2E8F0;
    width: 100%;
    box-sizing: border-box;
    justify-content: flex-start;
  }

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

  .color-dot {
    width: 36px;
    height: 36px;
    flex: 0 0 36px;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  }

  .coloring-templates-grid {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 10px;
    padding: 8px 6px 12px 6px;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 10px;
    background: #F8FAFC;
    border-radius: 20px;
    border: 2px dashed #CBD5E0;
  }

  .coloring-templates-grid::-webkit-scrollbar {
    display: none;
  }

  .template-card {
    flex: 0 0 110px;
    min-width: 110px;
    padding: 8px 6px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .template-card-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
  }

  .template-card-title {
    font-size: 0.74rem;
    line-height: 1.2;
  }

  .coloring-mode-badge {
    font-size: 0.78rem;
    padding: 4px 10px;
    line-height: 1.3;
    border-radius: 20px;
  }

  .coloring-toolbar-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    width: 100%;
    margin-top: 8px;
  }

  .btn-coloring-action {
    flex: 1;
    padding: 9px 12px;
    font-size: 0.86rem;
    border-radius: 16px;
    min-height: 42px;
    text-align: center;
  }

  .btn-finish-coloring {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.98rem;
    border-radius: 24px;
    min-height: 48px;
    text-align: center;
  }

  /* Xưởng Vẽ Tí Hon (Drawing Studio) trên Mobile */
  .art-studio-arena {
    width: 100%;
    max-width: 100%;
  }

  .canvas-wrapper {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    border-radius: 18px;
    padding: 6px;
  }

  #art-drawing-canvas {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: 45vh !important;
    border-radius: 14px;
    touch-action: none;
  }

  .toolbar-group {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
  }

  /* Phân Hệ Bé Ngoan & 5 Điều Bác Hồ Dạy */
  .uncle-ho-card {
    padding: 14px 12px;
    border-radius: 18px;
  }

  .uncle-ho-card h3 {
    font-size: 1.05rem;
  }

  .scenario-card {
    padding: 14px 12px;
    border-radius: 18px;
  }

  .scenario-situation {
    font-size: 1.05rem;
    line-height: 1.45;
  }

  .true-false-actions {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }

  .btn-true-false {
    width: 100%;
    min-height: 56px;
    font-size: 1.15rem;
  }

  .good-deeds-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  /* Bản Đồ Thám Hiểm */
  .world-map-container {
    padding: 4px;
  }

  .panoramic-world-stage {
    padding: 10px 6px;
    border-radius: 20px;
  }

  .world-stage-canvas-card {
    min-height: 270px;
    padding: 12px 6px;
    border-radius: 18px;
  }

  .stepping-stone-btn {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }

  .map-islands-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .island-card {
    padding: 14px 12px;
    border-radius: 18px;
  }

  /* Hộp Thoại Popup & Modals */
  .app-modal {
    padding: 10px;
  }

  .modal-content {
    width: 95vw !important;
    max-width: 95vw !important;
    max-height: 88vh;
    padding: 18px 14px;
    border-radius: 24px;
  }

  .modal-header h2 {
    font-size: 1.2rem;
  }

  .modal-close-btn {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }

  .parent-settings-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .sticker-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .sticker-item {
    padding: 10px 4px;
  }

  .sticker-item .sticker-emoji {
    font-size: 2.2rem;
  }
}

/* ================= 3. ĐIỀU CHỈNH RIÊNG CHO MÀN HÌNH NHỎ (< 390px - iPhone SE/Mini) ================= */
@media (max-width: 390px) {
  .brand-title {
    font-size: 1.1rem;
  }

  .alphabet-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .options-grid {
    gap: 8px;
  }

  .option-btn {
    min-height: 52px;
    font-size: 1.2rem;
  }

  .b-nav-item .b-nav-label {
    font-size: 0.68rem;
  }
}