/* =========================================================
   唐楓－全站手機 UI 一致性 v1.0.7
   OpenCart 3.0.5.1

   原則：
   1. 991px 以下統一視為手機版。
   2. 不覆蓋已定案的 MENU、商品篩選與相關商品模組。
   3. 可展開、可滑動、可選擇的區塊必須留下清楚線索。
   4. 不靠動畫傳達重要操作。
========================================================= */

/* 全站隱藏麵包屑；保留原始 HTML，不逐頁修改 Twig。 */
.breadcrumb {
  display: none !important;
}

@media (max-width: 991px) {

  /* -----------------------------------------------------
     Header：移除 768～991px 的第三套排列，統一手機直向版
  ----------------------------------------------------- */
  header {
    padding-bottom: 4px;
  }

  header .container {
    padding-right: 12px;
    padding-left: 12px;
  }

  header .row {
    display: block !important;
    margin-right: -12px !important;
    margin-left: -12px !important;
  }

  header .row > [class*="col-sm-"],
  header .row > [class*="col-md-"],
  header .row > [class*="col-lg-"] {
    float: none !important;
    width: 100% !important;
  }

  #logo {
    display: flex;
    justify-content: center;
    min-height: 0 !important;
    margin-bottom: 0 !important;
    padding: 4px 0 10px;
    text-align: center;
  }

  #logo a {
    display: flex;
    justify-content: center;
  }

  #logo img {
    width: auto;
    max-width: 150px !important;
    max-height: 66px !important;
  }

  #search.input-group {
    margin: 0 0 8px !important;
  }

  #search.input-group > .form-control,
  #search.input-group > .input-lg {
    height: 48px !important;
    padding: 0 14px !important;
    font-size: 15px !important;
    line-height: 48px !important;
  }

  #search.input-group > .input-group-btn > .btn,
  #search.input-group > .input-group-btn > .btn-lg {
    width: 64px !important;
    height: 48px !important;
  }

  #cart {
    margin: 0 0 11px !important;
  }

  #cart > .btn {
    height: 48px !important;
    font-size: 14px !important;
    line-height: 46px !important;
  }

  #cart .dropdown-menu {
    right: 0 !important;
    left: 0 !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
  }

  #cart .dropdown-menu li > div {
    width: 100% !important;
    min-width: 0 !important;
  }

  /* -----------------------------------------------------
     原生下拉選單：保留欄位名稱、目前值與明顯向下箭頭
  ----------------------------------------------------- */
  select.form-control {
    min-height: 50px !important;
    padding-right: 46px !important;
    padding-left: 13px !important;
    background-color: #ffffff !important;
    background-image:
      linear-gradient(45deg, transparent 50%, #497174 50%),
      linear-gradient(135deg, #497174 50%, transparent 50%) !important;
    background-position:
      calc(100% - 20px) 50%,
      calc(100% - 14px) 50% !important;
    background-size: 6px 6px, 6px 6px !important;
    background-repeat: no-repeat !important;
    border: 2px solid #cfcfcf !important;
    border-radius: 9px !important;
    color: #333333 !important;
    font-size: 16px !important;
    line-height: 1.4 !important;
    appearance: none;
    -webkit-appearance: none;
  }

  select.form-control:focus {
    border-color: #00a4ad !important;
    box-shadow: 0 0 0 3px rgba(0, 164, 173, 0.13) !important;
    outline: none !important;
  }

  /* Bootstrap 下拉選單：開啟時翻轉原有 caret，不再加第二支箭頭。 */
  .dropdown-toggle .caret {
    margin-left: 6px;
    border-top-width: 6px;
    border-right-width: 5px;
    border-left-width: 5px;
    transition: none !important;
  }

  .dropdown.open > .dropdown-toggle .caret,
  .btn-group.open > .dropdown-toggle .caret {
    transform: rotate(180deg);
  }

  /* -----------------------------------------------------
     可展開區塊：標題列始終可見，右側以箭頭表示狀態
  ----------------------------------------------------- */
  .panel-heading a[data-toggle="collapse"],
  .panel-heading button[data-toggle="collapse"],
  a.accordion-toggle[data-toggle="collapse"] {
    position: relative;
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    min-height: 44px;
    padding-right: 34px !important;
    color: #3f4f50;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.45;
    text-decoration: none !important;
  }

  .panel-heading a[data-toggle="collapse"]::after,
  .panel-heading button[data-toggle="collapse"]::after,
  a.accordion-toggle[data-toggle="collapse"]::after {
    content: "⌄";
    position: absolute;
    top: 50%;
    right: 6px;
    color: #008f97;
    font-size: 25px;
    font-weight: 700;
    line-height: 1;
    transform: translateY(-58%);
  }

  .panel-heading a[data-toggle="collapse"][aria-expanded="true"]::after,
  .panel-heading button[data-toggle="collapse"][aria-expanded="true"]::after,
  a.accordion-toggle[data-toggle="collapse"][aria-expanded="true"]::after {
    content: "⌃";
    transform: translateY(-40%);
  }

  /* 原頁面若已有 Font Awesome caret，避免同時出現兩套箭頭。 */
  .panel-heading a[data-toggle="collapse"] > .fa-caret-down,
  .panel-heading button[data-toggle="collapse"] > .fa-caret-down,
  a.accordion-toggle[data-toggle="collapse"] > .fa-caret-down {
    display: none !important;
  }

  /* -----------------------------------------------------
     可左右滑動的通用元件
     A14 商品篩選與 A15 相關商品各自維持原模組規則。
  ----------------------------------------------------- */
  .nav-tabs,
  .table-responsive {
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .nav-tabs::-webkit-scrollbar,
  .table-responsive::-webkit-scrollbar {
    display: none;
  }

  .nav-tabs {
    display: flex !important;
    flex-wrap: nowrap !important;
    width: 100%;
    overflow-x: auto !important;
    overflow-y: hidden !important;
  }

  .nav-tabs > li {
    float: none !important;
    flex: 0 0 auto;
  }

  .table-responsive {
    width: 100%;
    overflow-x: auto !important;
    overflow-y: hidden !important;
  }

  .tf-mobile-overflow-hint-v100 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    margin: 5px 0 13px;
    padding: 7px 10px;
    background: #f1fbfb;
    border: 1px solid #c5e6e8;
    border-radius: 7px;
    color: #457174;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
  }

  .tf-mobile-overflow-hint-v100::before {
    content: "←";
  }

  .tf-mobile-overflow-hint-v100::after {
    content: "→";
  }

  /* -----------------------------------------------------
     會員註冊：原手機規則只有 767px，補齊至 991px
  ----------------------------------------------------- */
  #account-register .tf-register-form .form-group {
    display: block !important;
    margin-bottom: 17px !important;
  }

  #account-register .tf-register-form .control-label {
    display: block !important;
    width: 100% !important;
    padding: 0 0 7px !important;
    font-size: 16px !important;
    text-align: left !important;
  }

  #account-register .tf-register-form .col-sm-10,
  #account-register .tf-register-form .col-sm-12,
  #account-register .tf-register-form [class*="col-md-"] {
    float: none !important;
    width: 100% !important;
    padding-right: 0 !important;
    padding-left: 0 !important;
  }

  #account-register .tf-register-form .form-control {
    width: 100% !important;
    height: 52px !important;
    font-size: 16px !important;
  }

  #account-register .tf-register-login a {
    display: block;
    max-width: 240px;
    min-height: 44px;
    margin: 9px auto 0;
  }

  /* -----------------------------------------------------
     Checkout：只補展開線索與可橫向檢視提示，不更動 AJAX 流程
  ----------------------------------------------------- */
  #checkout-checkout #accordion > .panel > .panel-heading {
    min-height: 52px;
  }

  #checkout-checkout #accordion > .panel > .panel-heading .panel-title {
    width: 100%;
    font-size: 17px;
    line-height: 1.45;
  }

  #checkout-checkout #accordion .panel-body select.form-control {
    width: 100% !important;
  }
}

@media (max-width: 420px) {
  #logo img {
    max-width: 135px !important;
  }

  #search.input-group > .form-control,
  #search.input-group > .input-lg {
    padding-right: 11px !important;
    padding-left: 11px !important;
    font-size: 14px !important;
  }

  #search.input-group > .input-group-btn > .btn,
  #search.input-group > .input-group-btn > .btn-lg {
    width: 60px !important;
  }

  #cart > .btn {
    font-size: 12px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dropdown-toggle .caret {
    transition: none !important;
  }
}