/* Trang khách — phong cách «tiệm đặc sản lâu năm» (tham khảo Murray's Cheese):
   nền kem, đỏ đô, tiêu đề in hoa đậm, chữ máy đánh chữ cho mô tả, nút viền mảnh có mũi tên. Hai bộ áo sáng/tối. */
:root {
  --co: 1;
  color-scheme: light;
  --nen: #FFFBF2; --nen-2: #FFF1D6; --be-mat: #FFFFFF; --nen-3: #F4E8D4;
  --vien: #EADCC6; --vien-2: #D6C2A5;
  --chu: #1E1714; --chu-2: #5C4D43; --chu-3: #8E7E71;
  --chinh: #A31A1A; --chinh-dam: #7E1010; --chinh-nhat: #FBE7E2; --tren-chinh: #FFFBF2;
  --vang: #9A6512; --vang-nhat: #FBEFD6;
  --xanh: #2E7A4C; --xanh-nhat: #E3F3E8;
  --do: #B42318; --do-nhat: #FDECEB;
  --bong: 0 1px 2px rgba(60,35,15,.06), 0 10px 26px rgba(60,35,15,.09);
  --f-chu: "Be Vietnam Pro", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --f-serif: "Lora", Georgia, "Times New Roman", serif;
  --f-may: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --f-tay: "Dancing Script", "Brush Script MT", cursive;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --nen: #15100D; --nen-2: #20170F; --be-mat: #1C1511; --nen-3: #2A2019;
  --vien: #3A2D24; --vien-2: #4F3E31;
  --chu: #F7EEE3; --chu-2: #CDBBA9; --chu-3: #94826F;
  --chinh: #F26B5B; --chinh-dam: #FF8E80; --chinh-nhat: #3A1B16; --tren-chinh: #1A0D09;
  --vang: #E7B65C; --vang-nhat: #3A2C12;
  --xanh: #6CC792; --xanh-nhat: #173322;
  --do: #F08A80; --do-nhat: #3D1A17;
  --bong: 0 1px 2px rgba(0,0,0,.4), 0 10px 26px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 120px; }
body { margin: 0; background: var(--nen); color: var(--chu); font: calc(15px * var(--co))/1.55 var(--f-chu); min-height: 100vh; }
body.khoa-cuon { overflow: hidden; }
h1, h2, h3 { margin: 0; line-height: 1.2; }
p { margin: 0; }
a { color: var(--chinh); }
button, input, textarea, select { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
.ic { display: inline-flex; flex: none; }
.an-chu { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.khung { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 40px; }
.khung.hep { max-width: 760px; }
.mo { color: var(--chu-2); }
.dang-tai, .trong { color: var(--chu-2); padding: 40px 0; text-align: center; grid-column: 1 / -1; display: grid; gap: 14px; justify-items: center; }
:focus-visible { outline: 2px solid var(--chinh); outline-offset: 2px; }

/* ---------- nút ---------- */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 0 18px; border-radius: 4px;
  border: 1px solid var(--chu); background: transparent; color: var(--chu); font: 600 calc(12.5px * var(--co))/1 var(--f-chu); letter-spacing: .07em;
  text-transform: uppercase; cursor: pointer; text-decoration: none; white-space: nowrap; transition: background .15s, color .15s, border-color .15s; }
.nut:hover { background: var(--chu); color: var(--nen); }
.nut.chinh { background: var(--chinh); border-color: var(--chinh); color: var(--tren-chinh); }
.nut.chinh:hover { background: var(--chinh-dam); border-color: var(--chinh-dam); color: var(--tren-chinh); }
.nut.phu { background: var(--chinh-nhat); border-color: transparent; color: var(--chinh); }
.nut.phu:hover { background: var(--chinh); color: var(--tren-chinh); }
.nut.do { color: var(--do); border-color: var(--do); }
.nut.do:hover { background: var(--do); color: #fff; }
.nut.lon { min-height: 50px; padding: 0 22px; font-size: calc(13.5px * var(--co)); }
.nut.rong { width: 100%; }
.nut:disabled { opacity: .45; cursor: not-allowed; background: transparent; color: var(--chu); }
.nut.chinh:disabled { background: var(--chinh); color: var(--tren-chinh); }
.nut-tron { width: 40px; height: 40px; border-radius: 50%; border: 0; background: transparent; display: inline-grid; place-items: center; cursor: pointer; color: inherit; text-decoration: none; }
.nut-tron:hover { background: var(--nen-3); }
.nut-tron.nho { width: 30px; height: 30px; }
.nut-chu { height: 34px; padding: 0 10px; border-radius: 4px; border: 1px solid var(--vien-2); background: transparent; display: inline-flex; align-items: center; gap: 6px; font: 700 calc(12px * var(--co)) var(--f-chu); letter-spacing: .06em; cursor: pointer; }
.hang-nut { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.hang-nut.giua { justify-content: center; margin: 22px 0 40px; }

/* ---------- thanh thông báo + đầu trang ---------- */
#thanhThongBao { background: #A31A1A; color: #FFF6EC; font: 600 calc(11.5px * var(--co))/1.3 var(--f-chu); letter-spacing: .08em; text-transform: uppercase; }
.tb-trong { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 38px; }
#tbTrai, #tbPhai { display: flex; align-items: center; gap: 10px; }
#thanhThongBao a { color: inherit; text-underline-offset: 3px; display: inline-flex; align-items: center; gap: 6px; }
#dau { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--nen) 94%, transparent); backdrop-filter: blur(8px); }
.dau-trong { display: grid; grid-template-columns: 1fr auto 1fr; grid-template-areas: "nav ten cc"; align-items: center; gap: 16px; min-height: 84px; position: relative; }
.menu-dau { grid-area: nav; }
.thuong-hieu { grid-area: ten; }
.cong-cu { grid-area: cc; }
.cong-cu-trai, .cong-cu-phai { display: flex; align-items: center; gap: 4px; }
.dau-trong::after { content: ""; position: absolute; left: 40px; right: 40px; bottom: 0; height: 1px; background: var(--chinh); }
.menu-dau { display: flex; gap: clamp(12px, 1.3vw, 22px); flex-wrap: nowrap; }
.menu-dau a, .menu-dt a { font: 800 calc(13px * var(--co)) var(--f-chu); letter-spacing: .05em; text-transform: uppercase; color: var(--chinh); text-decoration: none; white-space: nowrap; }
.menu-dau a:hover, .menu-dt a:hover { text-decoration: underline; text-underline-offset: 5px; }
.menu-dt { display: none; }
:root[data-theme="dark"] #thanhThongBao { background: #5E1410; color: #FFE6DC; }
.thuong-hieu { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--chinh); min-width: 0; justify-self: center; }
.thuong-hieu b { font: 900 calc(24px * var(--co))/1 var(--f-chu); text-transform: uppercase; letter-spacing: .01em; white-space: nowrap; }
.logo { width: 58px; height: 58px; border-radius: 50%; overflow: hidden; flex: none; display: grid; place-items: center; background: var(--chinh); box-shadow: 0 0 0 3px var(--nen), 0 0 0 4px var(--vang); }
.logo img { width: 100%; height: 100%; object-fit: cover; }
.logo-chu { color: var(--tren-chinh); font-weight: 900; font-size: calc(22px * var(--co)); }
.cong-cu { display: flex; align-items: center; gap: 4px; justify-self: end; }
.nut-gio { position: relative; display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; border: 0; background: transparent; color: var(--chinh); cursor: pointer; }
.nut-gio:hover { background: var(--nen-3); }
.nut-gio .dem { position: absolute; top: 2px; right: 0; min-width: 19px; height: 19px; border-radius: 10px; background: var(--chinh); color: var(--tren-chinh); font: 700 calc(11px * var(--co))/19px var(--f-chu); text-align: center; padding: 0 5px; }

/* ---------- bìa ---------- */
#bia { padding-top: 32px; }
.bia-anh img { width: 100%; height: auto; border-radius: 4px; box-shadow: var(--bong); background: var(--nen-3); }
.bia-nut { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.bia-chu { background: var(--nen-2); border-radius: 4px; padding: 64px 48px; display: grid; gap: 16px; justify-items: start; }
.bia-chu h1 { font: 900 calc(clamp(34px, 6vw, 68px) * var(--co))/1 var(--f-chu); text-transform: uppercase; color: var(--chinh); letter-spacing: -.01em; }
.khau-hieu { font: 500 calc(clamp(16px, 2.2vw, 21px) * var(--co))/1.5 var(--f-serif); max-width: 620px; }
.bia-chu .bia-nut { justify-content: flex-start; margin-top: 6px; }
#camKet { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 0; margin-top: 30px; }
.cam-ket { display: inline-flex; align-items: center; gap: 10px; padding: 4px 22px; font: 600 calc(16px * var(--co)) var(--f-serif); color: var(--chu); }
.cam-ket + .cam-ket { border-left: 1px solid var(--vien-2); }
.cam-ket .ic { width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--chinh); color: var(--chinh); display: grid; place-items: center; }

/* ---------- tiêu đề khu ---------- */
.tieu-de-khu { text-align: center; font: 900 calc(clamp(28px, 4.6vw, 54px) * var(--co))/1.05 var(--f-chu); text-transform: uppercase; color: var(--chinh); letter-spacing: -.01em; margin-bottom: 40px; }
.tieu-de-khu span::before { content: "›"; margin-right: .3em; font-size: .62em; vertical-align: .18em; }
.tieu-de-khu span::after { content: "‹"; margin-left: .3em; font-size: .62em; vertical-align: .18em; }
.mo-dau-khu { text-align: center; font: 500 calc(18px * var(--co))/1.6 var(--f-serif); color: var(--chu-2); max-width: 660px; margin: -22px auto 36px; }

/* ---------- sản phẩm ---------- */
#khuSanPham { padding-top: 64px; padding-bottom: 72px; }
.canh-bao-lon { background: var(--vang-nhat); color: var(--vang); border-radius: 4px; padding: 12px 16px; margin-bottom: 24px; font-weight: 600; text-align: center; }
.luoi-sp { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 44px 32px; }
.the-sp { position: relative; display: flex; flex-direction: column; gap: 8px; }
.anh-sp { position: relative; aspect-ratio: 1; border: 0; padding: 0; background: var(--nen-3); cursor: pointer; overflow: hidden; border-radius: 2px; margin-bottom: 8px; }
.anh-sp img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.the-sp:hover .anh-sp img { transform: scale(1.04); }
.anh-thay { width: 100%; height: 100%; display: grid; place-items: center; background: radial-gradient(circle at 35% 30%, var(--be-mat), var(--nen-3) 75%); }
.anh-thay span { font-size: calc(clamp(54px, 9vw, 92px) * var(--co)); filter: drop-shadow(0 6px 10px rgba(80,40,10,.18)); }
.xem-nhanh { position: absolute; left: 50%; bottom: 14px; transform: translate(-50%, 8px); opacity: 0; background: var(--nen); color: var(--chu); font: 700 calc(11px * var(--co)) var(--f-chu); letter-spacing: .08em; text-transform: uppercase; padding: 7px 12px; border-radius: 2px; transition: opacity .2s, transform .2s; white-space: nowrap; }
.the-sp:hover .xem-nhanh, .anh-sp:focus-visible .xem-nhanh { opacity: 1; transform: translate(-50%, 0); }
.nhan-giam { position: absolute; top: 12px; right: 12px; background: var(--chinh); color: var(--tren-chinh); font: 700 calc(12px * var(--co)) var(--f-chu); padding: 4px 8px; border-radius: 2px; }
.nhan-het { position: absolute; left: 0; right: 0; bottom: 0; background: rgba(30,20,15,.82); color: #fff; font: 700 calc(12px * var(--co)) var(--f-chu); letter-spacing: .08em; text-transform: uppercase; padding: 9px; text-align: center; }
.the-sp.het .anh-sp > img, .the-sp.het .anh-sp > .anh-thay { filter: grayscale(.85); opacity: .65; }
.huy-hieu { position: absolute; top: -14px; left: -14px; z-index: 2; width: 92px; height: 52px; border-radius: 50%; background: var(--chinh); color: var(--tren-chinh);
  display: grid; place-items: center; font: 700 calc(13px * var(--co))/1 var(--f-serif); letter-spacing: .06em; text-transform: uppercase; box-shadow: 0 4px 10px rgba(120,20,10,.25); pointer-events: none; }
.ten-sp { font: 800 calc(15.5px * var(--co))/1.25 var(--f-chu); text-transform: uppercase; letter-spacing: .01em; color: var(--chu); }
.ten-sp button { all: unset; cursor: pointer; }
.ten-sp button:hover { color: var(--chinh); }
.mo-ta-ngan { font: 400 calc(12.5px * var(--co))/1.55 var(--f-may); color: var(--chu-2); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.gia { display: flex; align-items: baseline; flex-wrap: wrap; gap: 3px 6px; font-weight: 800; text-transform: uppercase; }
.gia b { font-size: calc(16px * var(--co)); color: var(--chu); }
.gia small { font-size: calc(12.5px * var(--co)); color: var(--chu-2); font-weight: 700; }
.gia s { color: var(--chu-3); font-size: calc(13px * var(--co)); font-weight: 500; }
.gia.lon b { font-size: calc(28px * var(--co)); color: var(--chinh); }
.nut-them { margin-top: auto; width: 100%; position: relative; }
.dem-nho { position: absolute; top: -9px; right: -7px; min-width: 22px; height: 22px; border-radius: 11px; background: var(--chinh); color: var(--tren-chinh); font: 700 calc(11.5px * var(--co))/22px var(--f-chu); letter-spacing: 0; text-align: center; padding: 0 6px; }
.o-quang-ba { display: grid; align-content: center; justify-items: center; gap: 22px; text-align: center; padding: 20px 6px 70px; }
.o-quang-ba p { font: 700 calc(clamp(20px, 2.1vw, 28px) * var(--co))/1.3 var(--f-serif); color: var(--chinh); }

/* ---------- giấy tờ & chứng nhận ---------- */
#khuGiayTo { background: var(--nen-2); padding: 72px 0 80px; }
.luoi-giay { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 250px)); justify-content: center; gap: 32px 28px; }
.the-giay { all: unset; cursor: pointer; display: grid; gap: 10px; align-content: start; }
.giay-anh { position: relative; aspect-ratio: 3 / 4; background: #fff; border: 1px solid var(--vien); padding: 10px; box-shadow: var(--bong); display: grid; place-items: center; transition: transform .2s; }
.the-giay:hover .giay-anh, .the-giay:focus-visible .giay-anh { transform: translateY(-4px); }
.the-giay:focus-visible { outline: 2px solid var(--chinh); outline-offset: 4px; }
.giay-anh img { width: 100%; height: 100%; object-fit: contain; }
.giay-pdf { display: grid; justify-items: center; gap: 6px; color: var(--chinh); font: 800 calc(14px * var(--co)) var(--f-chu); letter-spacing: .1em; }
.giay-so-trang { position: absolute; right: 8px; bottom: 8px; background: rgba(30,20,15,.8); color: #fff; font: 600 calc(11px * var(--co)) var(--f-chu); padding: 3px 8px; border-radius: 2px; }
.giay-ten { font: 800 calc(14.5px * var(--co))/1.3 var(--f-chu); text-transform: uppercase; letter-spacing: .01em; }
.giay-meta { display: grid; gap: 2px; font: 400 calc(12px * var(--co))/1.5 var(--f-may); color: var(--chu-2); }

/* ---------- xem giấy tờ phóng to ---------- */
#hopXem { position: fixed; inset: 0; z-index: 70; background: rgba(15,10,7,.96); display: flex; flex-direction: column; color: #fff; animation: hien .15s; }
.xem-dau { display: flex; align-items: center; gap: 10px; padding: 10px 12px 10px 20px; }
.xem-dau b { flex: 1; font: 700 calc(15px * var(--co)) var(--f-chu); text-transform: uppercase; letter-spacing: .02em; }
.xem-so { font: 500 calc(13px * var(--co)) var(--f-may); opacity: .8; }
.xem-dau .nut-tron { color: #fff; }
.xem-dau .nut-tron:hover { background: rgba(255,255,255,.12); }
.xem-than { flex: 1; min-height: 0; position: relative; display: grid; place-items: center; padding: 6px 70px 26px; }
.xem-than img { max-width: 100%; max-height: calc(100vh - 100px); object-fit: contain; background: #fff; box-shadow: 0 10px 40px rgba(0,0,0,.5); }
.xem-chuyen { position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; border-radius: 50%; border: 0; background: rgba(255,255,255,.14); color: #fff; display: grid; place-items: center; cursor: pointer; }
.xem-chuyen:hover { background: rgba(255,255,255,.26); }
.xem-chuyen.lui { left: 12px; }
.xem-chuyen.toi { right: 12px; }
.xem-pdf { display: grid; justify-items: center; gap: 18px; }

/* ---------- hộp nổi ---------- */
#lop { position: fixed; inset: 0; background: rgba(20,12,6,.5); z-index: 40; animation: hien .15s; }
.tam { position: fixed; z-index: 50; background: var(--be-mat); color: var(--chu); display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
#hopSp { left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(980px, calc(100vw - 32px)); max-height: calc(100vh - 48px); border-radius: 4px; overflow: auto; animation: noi .18s; }
.tam.phai { top: 0; right: 0; bottom: 0; width: min(440px, 100vw); animation: truot-phai .2s; }
@keyframes hien { from { opacity: 0; } }
@keyframes noi { from { opacity: 0; transform: translate(-50%, -46%); } }
@keyframes truot-phai { from { transform: translateX(40px); opacity: 0; } }
@keyframes truot-len { from { transform: translateY(40px); opacity: .4; } }
.nut-dong-noi { position: absolute; top: 10px; right: 10px; z-index: 2; background: var(--be-mat); box-shadow: var(--bong); }
.hop-sp { display: grid; grid-template-columns: 1fr 1fr; }
.hop-anh { aspect-ratio: 1; background: var(--nen-3); grid-row: span 2; }
.hop-anh img, .hop-anh .anh-thay { width: 100%; height: 100%; object-fit: cover; }
.hop-anh .anh-thay span { font-size: calc(120px * var(--co)); }
.hop-noi { padding: 32px 28px 12px; display: flex; flex-direction: column; gap: 14px; }
.hop-noi h2 { font: 900 calc(24px * var(--co))/1.2 var(--f-chu); text-transform: uppercase; padding-right: 30px; }
.nhan-nho { align-self: flex-start; background: var(--chinh); color: var(--tren-chinh); font: 700 calc(11px * var(--co)) var(--f-serif); letter-spacing: .08em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; }
.nhan-o { font: 700 calc(12px * var(--co)) var(--f-chu); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.ds-chip { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-loai { display: inline-flex; flex-direction: column; align-items: flex-start; gap: 3px; padding: 10px 14px; border-radius: 4px; border: 1px solid var(--vien-2); background: var(--be-mat); cursor: pointer; text-align: left; }
.chip-loai span { font-size: calc(14px * var(--co)); font-weight: 600; }
.chip-loai b { font: 500 calc(12.5px * var(--co)) var(--f-may); color: var(--chu-2); }
.chip-loai.chon { border-color: var(--chinh); box-shadow: inset 0 0 0 1px var(--chinh); background: var(--chinh-nhat); }
.chip-loai.chon b { color: var(--chinh); }
.mo-ta { font: 400 calc(13.5px * var(--co))/1.7 var(--f-may); color: var(--chu-2); white-space: pre-line; }
.canh-bao { background: var(--vang-nhat); color: var(--vang); padding: 10px 12px; border-radius: 4px; font-weight: 600; }
.hang-mua { grid-column: 2; display: flex; flex-wrap: wrap; gap: 10px; padding: 8px 28px 28px; align-items: center; }
.hang-mua .nut { flex: 1 1 150px; }
.buoc-so { display: inline-flex; align-items: center; border: 1px solid var(--vien-2); border-radius: 4px; height: 40px; flex: none; }
.buoc-so button { width: 38px; height: 38px; border: 0; background: transparent; cursor: pointer; display: grid; place-items: center; }
.buoc-so button:hover { background: var(--nen-3); }
.buoc-so output { min-width: 28px; text-align: center; font-weight: 700; font-variant-numeric: tabular-nums; }
.hang-mua .buoc-so { height: 50px; }
.hang-mua .buoc-so button { width: 46px; height: 48px; }

.hop-dau { display: flex; align-items: center; gap: 6px; padding: 12px 12px 12px 20px; border-bottom: 1px solid var(--vien); }
.hop-dau h2 { flex: 1; font: 900 calc(17px * var(--co)) var(--f-chu); text-transform: uppercase; letter-spacing: .02em; }
.hop-than { flex: 1; overflow: auto; padding: 16px 20px; display: flex; flex-direction: column; gap: 12px; }
.hop-chan { border-top: 1px solid var(--vien); padding: 14px 20px calc(14px + env(safe-area-inset-bottom)); display: grid; gap: 10px; }
.gio-trong { flex: 1; display: grid; place-content: center; justify-items: center; gap: 14px; color: var(--chu-2); padding: 30px; text-align: center; }
.dong-gio { display: grid; grid-template-columns: 64px 1fr auto; gap: 12px; align-items: start; padding-bottom: 12px; border-bottom: 1px dashed var(--vien); }
.dg-anh { width: 64px; height: 64px; border-radius: 2px; overflow: hidden; background: var(--nen-3); }
.dg-anh img { width: 100%; height: 100%; object-fit: cover; }
.dg-anh .anh-thay span { font-size: calc(32px * var(--co)); }
.dg-noi { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.dg-noi > b { font-size: calc(14px * var(--co)); text-transform: uppercase; font-weight: 800; }
.dg-noi small { color: var(--chu-2); font-family: var(--f-may); font-size: calc(12px * var(--co)); }
.dg-duoi { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 6px; }
.dg-tien { font-variant-numeric: tabular-nums; }
.dong-gio.het .dg-anh { opacity: .5; }
.loi-chu { color: var(--do) !important; font-weight: 600; }
.goi-y { display: flex; gap: 8px; align-items: center; background: var(--nen-2); border-radius: 4px; padding: 10px 12px; font-size: calc(14px * var(--co)); }
.goi-y.tot { background: var(--xanh-nhat); color: var(--xanh); }
.goi-y.canh { background: var(--vang-nhat); color: var(--vang); }
.dong-tong { display: flex; justify-content: space-between; gap: 10px; font-variant-numeric: tabular-nums; }
.dong-tong.tong { font-size: calc(17px * var(--co)); padding-top: 8px; border-top: 1px solid var(--vien); font-weight: 700; }
.dong-tong.tong b { color: var(--chinh); font-size: calc(21px * var(--co)); }
.ghi-chu-nho { color: var(--chu-3); text-align: center; font-size: calc(12.5px * var(--co)); }

/* ---------- biểu mẫu ---------- */
.truong { display: grid; gap: 6px; }
.truong label { font: 700 calc(12px * var(--co)) var(--f-chu); letter-spacing: .06em; text-transform: uppercase; }
.o-nhap { width: 100%; min-height: 46px; padding: 11px 13px; border-radius: 4px; border: 1px solid var(--vien-2); background: var(--be-mat); font-size: calc(16px * var(--co)); resize: vertical; }
.o-nhap:focus { border-color: var(--chu); outline: 2px solid color-mix(in srgb, var(--chinh) 22%, transparent); }
.o-nhap.sai { border-color: var(--do); }
.loi-o { color: var(--do); font-size: calc(13px * var(--co)); }
.loi-o:empty { display: none; }
.nhom-chon { border: 0; margin: 0; padding: 0; display: grid; gap: 8px; }
.nhom-chon legend { font: 700 calc(12px * var(--co)) var(--f-chu); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 6px; padding: 0; }
.the-chon { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--vien-2); border-radius: 4px; cursor: pointer; }
.the-chon:has(input:checked) { border-color: var(--chinh); box-shadow: inset 0 0 0 1px var(--chinh); background: var(--chinh-nhat); }
.the-chon input { accent-color: var(--chinh); width: 18px; height: 18px; margin: 2px 0 0; flex: none; }
.tc-noi { display: grid; gap: 2px; }
.tc-noi small { color: var(--chu-2); }
.tom-tat { display: grid; gap: 6px; background: var(--nen-2); border-radius: 4px; padding: 14px; }

/* ---------- theo dõi đơn ---------- */
#trangDon, #trangDonToi { padding-top: 24px; padding-bottom: 30px; }
.quay-ve { display: inline-flex; align-items: center; gap: 6px; text-decoration: none; font: 800 calc(12.5px * var(--co)) var(--f-chu); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 16px; }
.the-don { background: var(--be-mat); border: 1px solid var(--vien); border-radius: 4px; padding: 22px; margin-bottom: 14px; box-shadow: var(--bong); display: grid; gap: 10px; }
.the-don h2 { font: 900 calc(16px * var(--co)) var(--f-chu); text-transform: uppercase; letter-spacing: .02em; }
.dau-don { text-align: center; justify-items: center; }
.dau-don h1 { font: 900 calc(24px * var(--co)) var(--f-chu); text-transform: uppercase; color: var(--chinh); }
.dau-bieu-tuong { width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center; background: var(--xanh-nhat); color: var(--xanh); }
.dau-don.huy .dau-bieu-tuong { background: var(--do-nhat); color: var(--do); }
.ma-don { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--chu); border-radius: 4px; padding: 4px 6px 4px 14px; font-family: var(--f-may); }
.ma-don b { font-size: calc(18px * var(--co)); letter-spacing: .14em; }
.cac-buoc { list-style: none; padding: 0; margin: 10px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); width: 100%; }
.cac-buoc li { display: grid; justify-items: center; gap: 4px; position: relative; font-size: calc(13px * var(--co)); color: var(--chu-3); text-align: center; }
.cac-buoc li::before { content: ""; position: absolute; top: 13px; left: -50%; width: 100%; height: 3px; background: var(--vien); z-index: 0; }
.cac-buoc li:first-child::before { display: none; }
.cac-buoc li.xong::before { background: var(--xanh); }
.cac-buoc li.xong { color: var(--chu); }
.cham { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--nen-3); color: var(--chu-2); font-weight: 700; font-size: calc(12px * var(--co)); z-index: 1; }
.cac-buoc li.xong .cham { background: var(--xanh); color: #fff; }
.cac-buoc small { color: var(--chu-3); font-family: var(--f-may); }
.van-don { display: inline-flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: center; font-family: var(--f-may); }
.thanh-toan-ck { border-color: var(--chinh); }
.ck-luoi { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; }
.qr { width: 220px; height: 220px; background: #fff; border-radius: 4px; padding: 6px; border: 1px solid var(--vien); image-rendering: pixelated; }
.ck-tt { margin: 0; display: grid; gap: 8px; }
.ck-tt dt { color: var(--chu-2); font: 700 calc(11.5px * var(--co)) var(--f-chu); letter-spacing: .06em; text-transform: uppercase; }
.ck-tt dd { margin: 0; display: flex; align-items: center; gap: 4px; font-family: var(--f-may); word-break: break-word; }
.da-tra { display: flex; gap: 8px; align-items: center; justify-content: center; background: var(--xanh-nhat); color: var(--xanh); border-radius: 4px; padding: 12px; font-weight: 600; margin-bottom: 14px; }
.ds-dong { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ds-dong li { display: flex; justify-content: space-between; gap: 12px; }
.ds-dong small { display: block; color: var(--chu-2); font-family: var(--f-may); font-size: calc(12px * var(--co)); }
.the-don p { display: flex; gap: 8px; align-items: flex-start; }
.tieu-de-trang { font: 900 calc(30px * var(--co)) var(--f-chu); text-transform: uppercase; color: var(--chinh); margin-bottom: 16px; }
.ds-don-toi { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 8px; }
.ds-don-toi a { display: grid; grid-template-columns: auto 1fr auto auto; gap: 12px; align-items: center; padding: 14px 16px; background: var(--be-mat); border: 1px solid var(--vien); border-radius: 4px; text-decoration: none; color: var(--chu); }
.ds-don-toi b { letter-spacing: .1em; font-family: var(--f-may); }
.ds-don-toi span { color: var(--chu-2); font-variant-numeric: tabular-nums; }
.form-tra { max-width: 460px; }

/* ---------- chân trang ---------- */
#chan { padding: 0 0 26px; }
.chan-luoi { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 32px; border-top: 1px solid var(--chu); padding-top: 40px; margin-top: 56px; }
.chan-cot { display: grid; gap: 10px; align-content: start; }
.chan-nhan { justify-self: start; border: 1px solid var(--chu); padding: 6px 12px; font: 500 calc(12px * var(--co)) var(--f-may); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.chan-cot a { font: 800 calc(13.5px * var(--co)) var(--f-chu); text-transform: uppercase; letter-spacing: .02em; color: var(--chu); text-decoration: none; }
.chan-cot a:hover { color: var(--chinh); }
.chan-cot p { font: 400 calc(13px * var(--co))/1.6 var(--f-may); color: var(--chu-2); }
.chan-lien-he { display: grid; gap: 12px; align-content: start; }
.chu-tay { font: 700 calc(36px * var(--co))/1 var(--f-tay); color: var(--chinh); }
.chu-may { display: grid; gap: 4px; font: 400 calc(13.5px * var(--co))/1.6 var(--f-may); color: var(--chu); }
.chu-may a { color: inherit; }
.mxh { display: flex; gap: 10px; }
.mxh a { width: 44px; height: 44px; border-radius: 50%; border: 1.5px solid var(--chu); display: grid; place-items: center; color: var(--chu); text-decoration: none; font: 800 calc(12px * var(--co)) var(--f-chu); }
.mxh a:hover { background: var(--chu); color: var(--nen); }
.chan-cuoi { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--vien); margin-top: 36px; padding-top: 16px; font: 500 calc(12px * var(--co)) var(--f-may); text-transform: uppercase; letter-spacing: .06em; color: var(--chu-2); }
.chan-cuoi a { color: inherit; }

#noiLienHe { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 25; display: grid; gap: 10px; }
#noiLienHe a { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; text-decoration: none; font-weight: 800; font-size: calc(13px * var(--co)); box-shadow: 0 6px 18px rgba(0,0,0,.22); }
.lh-zalo { background: #0068ff; color: #fff; }
.lh-goi { background: var(--xanh); color: #fff; }
#thanhGio { position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 26; display: flex; align-items: center; gap: 12px; padding: 0 18px; height: 56px; border-radius: 4px; border: 0; background: var(--chinh); color: var(--tren-chinh); font: 800 calc(13px * var(--co)) var(--f-chu); letter-spacing: .05em; text-transform: uppercase; box-shadow: 0 10px 30px rgba(120,20,10,.35); cursor: pointer; }
.tg-trai { display: grid; text-align: left; line-height: 1.25; flex: 1; letter-spacing: 0; text-transform: none; }
#tgSo { font-size: calc(12.5px * var(--co)); font-weight: 500; opacity: .9; }
#tgTien { font-size: calc(16px * var(--co)); }
body.co-thanh-gio #noiLienHe { bottom: calc(80px + env(safe-area-inset-bottom)); }
body.co-thanh-gio { padding-bottom: 76px; }

/* ---------- thông báo nhanh ---------- */
#bao { position: fixed; top: 132px; left: 50%; transform: translateX(-50%); z-index: 80; display: grid; gap: 8px; width: min(420px, calc(100vw - 32px)); pointer-events: none; }
.bao { background: var(--chu); color: var(--nen); padding: 11px 16px; border-radius: 4px; box-shadow: var(--bong); font-weight: 600; font-size: calc(14px * var(--co)); transition: opacity .4s, transform .4s; text-align: center; }
.bao.tot { background: var(--xanh); color: #fff; }
.bao.xau { background: var(--do); color: #fff; }
.bao.di { opacity: 0; transform: translateY(-8px); }

/* ---------- màn vừa ---------- */
@media (max-width: 1100px) {
  .luoi-sp { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 24px; }
  .menu-dau { gap: 16px; }
}
@media (min-width: 720px) {
  #thanhGio { display: none !important; }
  body.co-thanh-gio { padding-bottom: 0; }
  body.co-thanh-gio #noiLienHe { bottom: calc(16px + env(safe-area-inset-bottom)); }
}
@media (max-width: 1180px) {
  /* Đầu trang điện thoại/máy tính bảng: [ngôn ngữ · sáng/tối]  [LOGO + TÊN ở chính giữa]  [đơn · giỏ] */
  .dau-trong { grid-template-columns: 1fr auto 1fr; grid-template-areas: "trai ten phai"; min-height: 60px; gap: 6px; }
  .menu-dau { display: none; }
  .cong-cu { display: contents; }
  .cong-cu-trai { grid-area: trai; justify-self: start; }
  .cong-cu-phai { grid-area: phai; justify-self: end; }
  .thuong-hieu { justify-self: center; }
  /* hàng menu riêng, KHÔNG dính theo khi cuộn (để dành chỗ cho sản phẩm), mỗi mục cao 44px cho dễ bấm */
  .menu-dt { display: flex; align-items: stretch; border-bottom: 1px solid var(--vien); background: var(--nen); overflow-x: auto; scrollbar-width: none; padding: 0 6px; }
  .menu-dt::-webkit-scrollbar { display: none; }
  /* lề tự động = chia đều khi vừa; khi không vừa (4 mục tiếng Anh, máy nhỏ) thì về 0 và hàng menu cuộn ngang, trang không tràn */
  .menu-dt a { flex: none; margin: 0 auto; display: flex; align-items: center; min-height: 44px; padding: 0 7px; font-size: calc(12px * var(--co)); letter-spacing: .04em; }
}

/* ---------- điện thoại ---------- */
@media (max-width: 719px) {
  html { scroll-padding-top: 70px; }
  .khung { padding: 0 16px; }
  .dau-trong::after { left: 16px; right: 16px; }
  .tb-trong { justify-content: center; text-align: center; }
  .tb-phu, #tbPhai { display: none !important; }
  .dau-trong { min-height: 58px; }
  .dau-trong::after { display: none; }
  #dau { border-bottom: 1px solid var(--chinh); }
  .tb-trong { min-height: 30px; }
  #thanhThongBao { font-size: calc(10.5px * var(--co)); letter-spacing: .06em; }
  .logo { width: 40px; height: 40px; box-shadow: 0 0 0 2px var(--nen), 0 0 0 3px var(--vang); }
  .thuong-hieu { gap: 8px; min-width: 0; }
  .thuong-hieu b { font-size: calc(15.5px * var(--co)); overflow: hidden; text-overflow: ellipsis; }
  .cong-cu-trai, .cong-cu-phai { gap: 0; }
  .cong-cu-trai .nut-tron, .cong-cu-phai .nut-tron { width: 36px; height: 36px; }
  .nut-chu { padding: 0 8px; height: 32px; }
  .nut-chu .ic { display: none; }
  .nut-gio { width: 40px; height: 40px; }
  /* Điện thoại: bìa + sản phẩm lên trước. Nút gọi đã nổi ở góc, cam kết đã có trong ảnh bìa → không lặp lại. */
  #bia { padding-top: 12px; }
  #bia.co-anh .bia-nut { display: none; }
  #camKet.co-bia { display: none !important; }
  .bia-nut { margin-top: 16px; }
  .bia-nut .nut { flex: 1 1 auto; }
  .bia-nut .nut.chinh { flex-basis: 100%; }
  .bia-chu { padding: 40px 22px; }
  #camKet { margin-top: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .cam-ket { padding: 10px 12px; border: 1px solid var(--vien); border-radius: 4px; font-size: calc(14.5px * var(--co)); }
  .cam-ket + .cam-ket { border-left: 1px solid var(--vien); }
  .tieu-de-khu { margin-bottom: 18px; font-size: calc(26px * var(--co)); }
  .mo-dau-khu { font-size: calc(16px * var(--co)); margin: -12px auto 26px; }
  #khuSanPham { padding-top: 22px; padding-bottom: 40px; }
  .luoi-sp { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 12px; }
  .o-quang-ba { display: none !important; }
  .huy-hieu { width: 74px; height: 42px; font-size: calc(11px * var(--co)); top: -10px; left: -6px; }
  .ten-sp { font-size: calc(13.5px * var(--co)); }
  .mo-ta-ngan { display: none; }
  .the-sp { gap: 6px; }
  .anh-sp { margin-bottom: 4px; }
  .gia b { font-size: calc(15px * var(--co)); }
  .nut-them { padding: 0 8px; font-size: calc(11.5px * var(--co)); letter-spacing: .04em; }
  .nut-them .ic { display: none; }
  .xem-nhanh { display: none; }
  #khuGiayTo { padding: 48px 0 52px; }
  .luoi-giay { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 14px; }
  .giay-ten { font-size: calc(12.5px * var(--co)); }
  .giay-meta { font-size: calc(11px * var(--co)); }
  .xem-than { padding: 4px 8px 80px; }
  .xem-chuyen { top: auto; bottom: 16px; transform: none; }
  .xem-chuyen.lui { left: calc(50% - 60px); }
  .xem-chuyen.toi { right: calc(50% - 60px); }
  .xem-than img { max-height: calc(100vh - 150px); }
  .chan-luoi { grid-template-columns: 1fr 1fr; gap: 28px 18px; margin-top: 40px; }
  .chan-lien-he { grid-column: 1 / -1; }
  #hopSp { left: 0; right: 0; top: auto; bottom: 0; transform: none; width: 100%; max-height: 92vh; border-radius: 12px 12px 0 0; animation: truot-len .22s; }
  .hop-sp { grid-template-columns: 1fr; }
  .hop-anh { aspect-ratio: 4 / 3; grid-row: auto; }
  .hop-noi { padding: 18px 16px 8px; }
  .hop-noi h2 { font-size: calc(19px * var(--co)); }
  .hang-mua { grid-column: 1; position: sticky; bottom: 0; background: var(--be-mat); border-top: 1px solid var(--vien); padding: 12px 16px calc(12px + env(safe-area-inset-bottom)); }
  .hang-mua .buoc-so { order: -1; }
  .hang-mua .nut.vien { flex: 1 1 auto; padding: 0 12px; }
  .hang-mua .nut.chinh { flex-basis: 100%; }
  .tam.phai { width: 100%; top: 0; animation: truot-len .22s; }
  .ck-luoi { grid-template-columns: 1fr; justify-items: center; }
  .ds-don-toi a { grid-template-columns: auto 1fr auto; }
  .ds-don-toi a > span:nth-of-type(1) { display: none; }
  .the-don { padding: 16px; }
  #bao { top: 76px; }
}
@media (max-width: 380px) {
  .thuong-hieu b { font-size: calc(13.5px * var(--co)); }
  .logo { width: 36px; height: 36px; }
  .menu-dt a { font-size: calc(11px * var(--co)); letter-spacing: .02em; padding: 0 5px; }
}
@media print {
  #thanhThongBao, #dau, #chan, #noiLienHe, #thanhGio, .hang-nut, .quay-ve { display: none !important; }
}

/* ---------- nút Aa + bảng cỡ chữ / giao diện ---------- */
.nut-aa { font: 800 calc(15px * var(--co)) var(--f-serif); color: var(--chinh); letter-spacing: -.02em; }
.nut-aa[aria-expanded="true"] { background: var(--nen-3); }
#dau { position: sticky; }
.hop-hien-thi { position: absolute; top: calc(100% + 6px); right: max(40px, calc((100vw - 1320px) / 2 + 40px)); z-index: 45; width: 290px; background: var(--be-mat);
  border: 1px solid var(--vien); border-radius: 6px; box-shadow: 0 16px 40px rgba(40,20,8,.18); padding: 16px; display: grid; gap: 10px; animation: hien .15s; }
.ht-tieu-de { font: 800 calc(11.5px * var(--co)) var(--f-chu); letter-spacing: .08em; text-transform: uppercase; color: var(--chu-2); }
.ht-chon { display: grid; grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 8px; }
.ht-chon button { display: grid; justify-items: center; align-content: center; gap: 4px; min-height: 62px; border: 1px solid var(--vien-2); border-radius: 6px; background: var(--be-mat); cursor: pointer; color: var(--chu); }
.ht-chon button.chon { border-color: var(--chinh); box-shadow: inset 0 0 0 1px var(--chinh); background: var(--chinh-nhat); color: var(--chinh); }
.ht-chon small { font: 600 calc(12.5px * var(--co)) var(--f-chu); }
.mau-a { font-family: var(--f-serif); font-weight: 700; line-height: 1; }

/* ---------- video ---------- */
#khuVideo { padding: 64px 0 72px; }
.luoi-video { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 32px 28px; }
.luoi-video.mot { max-width: 880px; margin: 0 auto; grid-template-columns: 1fr; }
.day-video-doc { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.luoi-video[hidden] + .day-video-doc { margin-top: 0; }
.the-video { display: grid; gap: 12px; align-content: start; min-width: 0; }
.the-video.doc { width: 250px; }
.khung-video { position: relative; aspect-ratio: 16 / 9; background: #120c08; border-radius: 4px; overflow: hidden; box-shadow: var(--bong); }
.the-video.doc .khung-video { aspect-ratio: 9 / 16; }
.khung-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.mo-video { all: unset; position: absolute; inset: 0; cursor: pointer; display: block; }
.mo-video > img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s, filter .2s; }
.mo-video:hover > img { transform: scale(1.03); filter: brightness(.92); }
.mo-video:focus-visible { outline: 3px solid var(--chinh); outline-offset: -3px; }
.nut-phat { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 74px; height: 74px; border-radius: 50%; background: rgba(163,26,26,.92);
  color: #fff; display: grid; place-items: center; box-shadow: 0 8px 26px rgba(0,0,0,.35); transition: transform .2s; }
.nut-phat .ic { margin-left: 4px; }
.mo-video:hover .nut-phat { transform: translate(-50%, -50%) scale(1.08); }
.nhan-nguon { position: absolute; left: 12px; top: 12px; font: 700 calc(11px * var(--co)) var(--f-chu); letter-spacing: .06em; text-transform: uppercase; padding: 4px 9px; border-radius: 2px; color: #fff; }
.nhan-nguon.youtube { background: #c4302b; }
.nhan-nguon.facebook { background: #1877f2; }
/* ảnh bìa thay thế cho video Facebook: logo ở trên, nút phát ở giữa, tiêu đề ở dưới — không chồng lên nhau */
.bia-fb { position: absolute; inset: 0; background: radial-gradient(circle at 30% 20%, #7e1d12, #2a0d07 75%); color: #FFF3E6; }
.bia-fb img { position: absolute; left: 50%; top: 9%; transform: translateX(-50%); width: 64px; height: 64px; border-radius: 50%; box-shadow: 0 0 0 3px rgba(255,255,255,.2); }
.bia-fb b { position: absolute; left: 14px; right: 14px; bottom: 9%; text-align: center; font: 800 calc(15px * var(--co))/1.3 var(--f-chu); text-transform: uppercase; }
.ten-video { font: 800 calc(15.5px * var(--co))/1.3 var(--f-chu); text-transform: uppercase; letter-spacing: .01em; }

@media (max-width: 719px) {
  .hop-hien-thi { left: 12px; right: 12px; width: auto; }
  /* điện thoại: video xếp thành hàng vuốt ngang (thấy mép video kế tiếp) — trang không dài thêm */
  #khuVideo { padding: 40px 0 44px; }
  .luoi-video, .day-video-doc { display: flex; flex-wrap: nowrap; justify-content: flex-start; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory;
    margin: 0 -16px; padding: 0 16px 6px; scrollbar-width: none; }
  .luoi-video::-webkit-scrollbar, .day-video-doc::-webkit-scrollbar { display: none; }
  .luoi-video > .the-video { flex: 0 0 86%; scroll-snap-align: start; }
  .luoi-video.mot > .the-video { flex-basis: 100%; }
  .day-video-doc { margin-top: 24px; }
  .day-video-doc > .the-video.doc { flex: 0 0 58%; width: auto; scroll-snap-align: start; }
  .nut-phat { width: 60px; height: 60px; }
  .ten-video { font-size: calc(13.5px * var(--co)); }
}

/* ---------- thư viện ảnh (dưới video) + nhóm giấy tờ ---------- */
#khuAnh { padding: 64px 0 72px; }
.luoi-anh { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 300px)); justify-content: center; gap: 32px 24px; }
.the-anh { all: unset; cursor: pointer; display: grid; gap: 12px; align-content: start; }
.o-anh { position: relative; aspect-ratio: 4 / 3; border-radius: 4px; overflow: hidden; background: var(--nen-3); box-shadow: var(--bong); }
.o-anh img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.the-anh:hover .o-anh img { transform: scale(1.04); }
.the-anh:focus-visible .o-anh { outline: 3px solid var(--chinh); outline-offset: 3px; }
.ten-anh { font: 800 calc(15px * var(--co))/1.3 var(--f-chu); text-transform: uppercase; letter-spacing: .01em; }
.nhom-giay + .nhom-giay { margin-top: 48px; }
.nhom-giay-ten { display: table; margin: 0 auto 26px; border: 1px solid var(--chu); padding: 7px 16px; font: 500 calc(13px * var(--co)) var(--f-may); letter-spacing: .1em; text-transform: uppercase; }
@media (max-width: 719px) {
  #khuAnh { padding: 40px 0 44px; }
  .luoi-anh { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 12px; }
  .ten-anh { font-size: calc(12.5px * var(--co)); }
  .nhom-giay + .nhom-giay { margin-top: 34px; }
  .nhom-giay-ten { margin-bottom: 18px; }
}

/* ---------- cỡ chữ cho người lớn tuổi: Vừa · Lớn · Rất lớn ---------- */
:root[data-co="2"] { --co: 1.15; }
:root[data-co="3"] { --co: 1.3; }
/* khung cố định (logo, nhãn oval, bong bóng số) giữ cỡ gốc để chữ không tràn khung */
.thuong-hieu, .logo-chu, .huy-hieu, .dem, .dem-nho, .cham, .nhan-giam, #noiLienHe { --co: 1; }