/* =============================================================================
   BỐ CỤC ỨNG DỤNG — vỏ trang, menu trái, module bán hàng, thanh báo giá neo
   đáy và các bảng phụ (modal).
   Nguyên tắc xuyên suốt: mọi kích thước dùng đơn vị co giãn, mọi nút cao tối
   thiểu 48px cho ngón tay, bố cục tự xuống 1 cột khi bề ngang hẹp.
   ========================================================================== */

/* ---------------------------------------------------------------- VỎ TRANG */

.thanh-tieu-de {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  padding-left: 72px; /* chừa chỗ cho nút nổi ở góc trái */
  background: rgba(20, 20, 20, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--vien);
}

.thanh-tieu-de .ten-shop {
  margin: 0;
  font-size: 1.24rem;
  font-weight: 800;
  letter-spacing: .2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thanh-tieu-de .ten-shop .cham-xanh {
  color: var(--xanh);
}

.khung-noi-dung {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 16px calc(var(--cao-thanh-day) + 28px);
}

.khung-noi-dung.khong-thanh-day {
  padding-bottom: 40px;
}

/* Nút nổi chuyển module — luôn nằm góc trên bên trái, trên mọi thứ khác */
.nut-noi {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 70;
  width: 48px;
  height: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--bo);
  background: var(--the);
  border: 1px solid var(--vien-sang);
  box-shadow: var(--bong-noi);
  transition: background .18s, border-color .18s;
}

.nut-noi:hover {
  background: var(--the-nhat);
  border-color: var(--xanh);
}

.nut-noi .vach {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--chu);
  transition: transform .22s, opacity .18s;
}

.nut-noi[aria-expanded="true"] .vach:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nut-noi[aria-expanded="true"] .vach:nth-child(2) {
  opacity: 0;
}

.nut-noi[aria-expanded="true"] .vach:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ------------------------------------------------------------- MENU BÊN TRÁI */

.lop-phu {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(0, 0, 0, .58);
  opacity: 0;
  visibility: hidden;
  transition: opacity .22s, visibility .22s;
}

.lop-phu.mo {
  opacity: 1;
  visibility: visible;
}

.menu-trai {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 60;
  width: min(84vw, 320px);
  display: flex;
  flex-direction: column;
  background: var(--nen-noi);
  border-right: 1px solid var(--vien);
  box-shadow: var(--bong-modal);
  transform: translateX(-100%);
  transition: transform .26s ease;
}

.menu-trai.mo {
  transform: translateX(0);
}

.menu-trai .menu-dau {
  padding: 18px 20px 14px 20px;
  border-bottom: 1px solid var(--vien);
}

.menu-trai .menu-dau .nhan {
  display: block;
  font-size: .8rem;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--chu-mo);
  margin-bottom: 4px;
}

.menu-trai .menu-dau .ten {
  font-size: 1.1rem;
  font-weight: 700;
}

.menu-trai .danh-sach {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}

.muc-menu {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 52px;
  padding: 10px 14px;
  margin-bottom: 4px;
  border-radius: var(--bo);
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--chu-diu);
  transition: background .16s, color .16s;
}

.muc-menu:hover {
  background: var(--the);
  color: var(--chu);
}

.muc-menu.dang-xem {
  background: var(--the-nhat);
  color: var(--chu);
  box-shadow: inset 3px 0 0 var(--xanh);
}

.muc-menu .bieu-tuong {
  flex: 0 0 auto;
  width: 22px;
  text-align: center;
  font-size: 1.05rem;
  opacity: .9;
}

.menu-trai .menu-day {
  padding: 12px 20px 18px;
  border-top: 1px solid var(--vien);
  font-size: .82rem;
  color: var(--chu-mo);
}

/* ------------------------------------------------------- MÀN HÌNH ĐANG NÂNG CẤP */

.man-nang-cap {
  max-width: 560px;
  margin: 8vh auto;
  padding: 40px 28px;
  text-align: center;
  background: var(--nen-noi);
  border: 1px solid var(--vien);
  border-radius: var(--bo-lon);
}

.man-nang-cap .hinh {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 14px;
}

.man-nang-cap h2 {
  font-size: 1.4rem;
}

.man-nang-cap p {
  color: var(--chu-diu);
  margin-bottom: 0;
}

/* ------------------------------------------------------------ MODULE BÁN HÀNG */

.gioi-thieu {
  margin-bottom: 22px;
}

.gioi-thieu h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.4vw, 2rem);
  margin-bottom: 6px;
}

.gioi-thieu p {
  color: var(--chu-diu);
  margin-bottom: 0;
}

.bang-uu-dai {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 167, 46, .12);
  border: 1px solid rgba(255, 167, 46, .4);
  color: var(--cam);
  font-weight: 600;
  font-size: .95rem;
}

.luoi-sanpham {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.the-sanpham {
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: var(--the);
  border: 1px solid var(--vien);
  border-radius: var(--bo-lon);
  box-shadow: var(--bong-the);
  transition: border-color .18s, transform .18s, box-shadow .18s;
}

.the-sanpham:hover {
  transform: translateY(-2px);
  box-shadow: var(--bong-noi);
}

.the-sanpham.da-chon {
  border-color: var(--xanh);
  box-shadow: 0 0 0 1px var(--xanh), var(--bong-noi);
}

.the-sanpham .so-thu-tu {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: var(--chu-mo);
  margin-bottom: 8px;
}

.the-sanpham .ten-sanpham {
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.45;
  margin: 0 0 14px;
  flex: 1;
}

.the-sanpham .hang-gia {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
}

.the-sanpham .gia {
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--cam);
}

.the-sanpham .gia-goc {
  font-size: .92rem;
  color: var(--chu-mo);
  text-decoration: line-through;
}

.nut-chon {
  width: 100%;
  min-height: 48px;
  border-radius: var(--bo);
  font-weight: 600;
  background: var(--the-nhat);
  border: 1px solid var(--vien-sang);
  color: var(--chu);
  transition: background .16s, border-color .16s, color .16s;
}

.nut-chon:hover {
  border-color: var(--xanh);
  color: var(--xanh);
}

.the-sanpham.da-chon .nut-chon {
  background: var(--xanh-dam);
  border-color: var(--xanh-dam);
  color: #fff;
}

.the-sanpham.da-chon .nut-chon:hover {
  background: var(--xanh-dam-hover);
  color: #fff;
}

/* -------------------------------------------------- THANH BÁO GIÁ NEO ĐÁY */

.thanh-bao-gia {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  background: rgba(26, 26, 26, .97);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--vien-sang);
  box-shadow: 0 -8px 28px rgba(0, 0, 0, .5);
}

.thanh-bao-gia .so-lieu {
  display: flex;
  flex: 1 1 320px;
  flex-wrap: wrap;
  gap: 6px 22px;
  min-width: 0;
}

.thanh-bao-gia .o-so-lieu {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.thanh-bao-gia .nhan {
  font-size: .78rem;
  color: var(--chu-mo);
  white-space: nowrap;
}

.thanh-bao-gia .tri {
  font-size: 1.02rem;
  font-weight: 600;
  white-space: nowrap;
}

.thanh-bao-gia .tri.gach {
  text-decoration: line-through;
  color: var(--chu-diu);
  font-weight: 500;
}

.thanh-bao-gia .tri.giam {
  color: var(--la);
}

.thanh-bao-gia .tri.chot {
  font-size: 1.36rem;
  font-weight: 800;
  color: var(--cam);
}

.nut-mua-hang {
  flex: 0 0 auto;
  min-height: 52px;
  padding: 0 28px;
  border-radius: var(--bo);
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: var(--xanh-dam);
  box-shadow: 0 4px 16px rgba(20, 115, 230, .38);
  transition: background .16s, transform .12s, box-shadow .16s;
}

.nut-mua-hang:hover:not(:disabled) {
  background: var(--xanh-dam-hover);
  transform: translateY(-1px);
}

.nut-mua-hang:disabled {
  background: var(--the-nhat);
  color: var(--chu-mo);
  box-shadow: none;
  cursor: not-allowed;
}

@media (max-width: 560px) {
  .thanh-bao-gia {
    gap: 10px;
  }
  .thanh-bao-gia .so-lieu {
    flex: 1 1 100%;
    gap: 2px 16px;
  }
  .nut-mua-hang {
    flex: 1 1 100%;
  }
}

/* ------------------------------------------------------------------ MODAL */

.modal-lop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, .72);
  overflow-y: auto;
}

.modal {
  position: relative;
  width: min(100%, 620px);
  margin: auto;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 32px);
  background: var(--nen-noi);
  border: 1px solid var(--vien);
  border-radius: var(--bo-lon);
  box-shadow: var(--bong-modal);
  animation: modal-vao .22s ease;
}

@keyframes modal-vao {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-dau {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 60px 14px 22px;
  border-bottom: 1px solid var(--vien);
}

.modal-dau h2 {
  margin: 0;
  font-size: 1.16rem;
}

.nut-x {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--bo);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--chu-diu);
  background: var(--the);
  border: 1px solid var(--vien);
  transition: background .16s, color .16s;
}

.nut-x:hover {
  background: var(--do);
  border-color: var(--do);
  color: #fff;
}

.modal-than {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px;
}

.modal-day {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px 22px;
  padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--vien);
  background: var(--nen-sau);
  border-radius: 0 0 var(--bo-lon) var(--bo-lon);
}

.nut-day {
  flex: 1 1 160px;
  min-height: 50px;
  padding: 0 18px;
  border-radius: var(--bo);
  font-weight: 600;
  background: var(--the);
  border: 1px solid var(--vien-sang);
  color: var(--chu);
  transition: background .16s, border-color .16s;
}

.nut-day:hover {
  background: var(--the-nhat);
  border-color: var(--vien-sang);
}

.nut-day.chinh {
  background: var(--xanh-dam);
  border-color: var(--xanh-dam);
  color: #fff;
}

.nut-day.chinh:hover:not(:disabled) {
  background: var(--xanh-dam-hover);
}

.nut-day.chinh:disabled {
  background: var(--the-nhat);
  border-color: var(--vien);
  color: var(--chu-mo);
  cursor: not-allowed;
}

.nut-day.la {
  background: var(--la);
  border-color: var(--la);
  color: #fff;
}

.nut-day.la:hover {
  background: var(--la-dam);
}

/* ------------------------------------------- BẢNG TỔNG KẾT ĐƠN TRONG MODAL */

.tom-tat-don {
  margin-bottom: 20px;
  border: 1px solid var(--vien);
  border-radius: var(--bo);
  overflow: hidden;
}

.tom-tat-don .dong-sp {
  display: flex;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--vien);
  background: var(--the);
  font-size: .96rem;
}

.tom-tat-don .dong-sp .ten {
  flex: 1;
}

.tom-tat-don .dong-sp .gia {
  white-space: nowrap;
  font-weight: 600;
  color: var(--chu-diu);
}

.tom-tat-don .dong-tong {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 14px;
  background: var(--nen-sau);
}

.tom-tat-don .dong-tong + .dong-tong {
  border-top: 1px solid var(--vien);
}

.tom-tat-don .dong-tong .nhan {
  color: var(--chu-diu);
}

.tom-tat-don .dong-tong.chot {
  align-items: baseline;
  background: var(--the-nhat);
}

.tom-tat-don .dong-tong.chot .nhan {
  color: var(--chu);
  font-weight: 700;
}

.tom-tat-don .dong-tong.chot .tri {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--cam);
}

/* -------------------------------------------------------------- FORM NHẬP */

.nhom-truong {
  margin-bottom: 16px;
}

.nhom-truong label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: .95rem;
}

.nhom-truong input {
  width: 100%;
  min-height: 50px;
  padding: 0 14px;
  border-radius: var(--bo);
  background: var(--nen-sau);
  border: 1px solid var(--vien-sang);
  transition: border-color .16s, box-shadow .16s;
}

.nhom-truong input:focus {
  outline: none;
  border-color: var(--xanh);
  box-shadow: 0 0 0 3px rgba(49, 168, 255, .18);
}

.nhom-truong input.sai {
  border-color: var(--do);
}

.nhom-truong .goi-y {
  margin: 6px 0 0;
  font-size: .84rem;
  color: var(--chu-mo);
}

.nhom-truong .loi {
  margin: 6px 0 0;
  font-size: .86rem;
  color: var(--do);
  min-height: 0;
}

.ghi-chu-bat-buoc {
  margin-bottom: 16px;
  padding: 11px 14px;
  border-radius: var(--bo);
  background: rgba(49, 168, 255, .09);
  border: 1px solid rgba(49, 168, 255, .28);
  font-size: .92rem;
  color: var(--chu-diu);
}

/* --------------------------------------------------- MODAL THANH TOÁN / QR */

.khung-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 18px;
  margin-bottom: 18px;
  background: #fff;
  border-radius: var(--bo);
}

.khung-qr img,
.khung-qr canvas {
  width: min(260px, 68vw);
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
}

.khung-qr .ghi-chu-qr {
  margin: 0;
  color: #444;
  font-size: .88rem;
  font-weight: 600;
  text-align: center;
}

.khung-qr.trong {
  background: var(--the);
  border: 1px dashed var(--vien-sang);
}

.khung-qr .dang-tai {
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(260px, 68vw);
  min-height: 120px;
  padding: 8px;
  color: #666;
  font-size: .92rem;
  text-align: center;
}

.khung-qr.trong .dang-tai {
  color: var(--chu-diu);
}

.bang-ck {
  border: 1px solid var(--vien);
  border-radius: var(--bo);
  overflow: hidden;
  margin-bottom: 6px;
}

.dong-ck {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 14px;
  background: var(--the);
}

.dong-ck + .dong-ck {
  border-top: 1px solid var(--vien);
}

.dong-ck .noi-dung-dong {
  flex: 1 1 200px;
  min-width: 0;
}

.dong-ck .nhan {
  display: block;
  font-size: .8rem;
  color: var(--chu-mo);
}

.dong-ck .tri {
  font-size: 1.02rem;
  font-weight: 600;
  word-break: break-word;
}

.dong-ck .tri.tien {
  color: var(--cam);
  font-size: 1.14rem;
  font-weight: 800;
}

.nut-sao-chep {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 0 16px;
  border-radius: var(--bo);
  font-size: .92rem;
  font-weight: 600;
  background: var(--the-nhat);
  border: 1px solid var(--vien-sang);
  transition: background .16s, border-color .16s, color .16s;
}

.nut-sao-chep:hover {
  border-color: var(--xanh);
  color: var(--xanh);
}

.nut-sao-chep.da-chep {
  background: var(--la);
  border-color: var(--la);
  color: #fff;
}

.nut-tai-qr {
  width: 100%;
  min-height: 50px;
  margin-bottom: 18px;
  border-radius: var(--bo);
  font-weight: 600;
  background: var(--the);
  border: 1px solid var(--vien-sang);
  transition: background .16s, border-color .16s;
}

.nut-tai-qr:hover {
  background: var(--the-nhat);
  border-color: var(--xanh);
}

.loi-nhe {
  margin: 10px 0 0;
  padding: 10px 12px;
  border-radius: var(--bo);
  background: rgba(236, 91, 86, .1);
  border: 1px solid rgba(236, 91, 86, .34);
  color: var(--do);
  font-size: .9rem;
}

.huong-dan-ck {
  margin: 14px 0 0;
  font-size: .9rem;
  color: var(--chu-diu);
}

/* --------------------------------------------------------- TRANG NỘI DUNG */

.noi-dung-van-ban h3 {
  margin-top: 20px;
  font-size: 1.05rem;
}

.noi-dung-van-ban p:last-child {
  margin-bottom: 0;
}