:root {
  --teal: #10756e;
  --teal-dam: #135752;
  --kem: #fdfaea;
  --vang: #f5a623;
  --chu: #2f2f2f;
  --mo: #6b6b6b;
  --nen-the: #ffffff;
  --vien: #ece6cc;
  --bo: 14px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--kem); color: var(--chu);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; display: block; }
a { color: var(--teal); }
h1, h2, h3 { color: var(--teal-dam); line-height: 1.25; }
.khung { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.nho { font-size: 13px; color: var(--mo); }

/* đầu trang */
.dau { background: var(--teal); position: sticky; top: 0; z-index: 10; }
.dau-trong { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 19px; text-decoration: none; }
.logo img { border-radius: 50%; background: #fff; }
.dau nav a { color: #fff; text-decoration: none; margin-left: 18px; font-size: 15px; opacity: .92; }
.dau nav a:hover { opacity: 1; text-decoration: underline; }

/* hero */
.hero { padding: 40px 0 28px; }
.hero h1 { font-size: clamp(30px, 6vw, 46px); margin: 0 0 12px; }
.hero > .khung > p { font-size: 18px; color: var(--mo); max-width: 560px; margin: 0 0 24px; }
.tim-so { background: var(--nen-the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 16px; max-width: 420px; }
.tim-so label { display: block; font-weight: 600; margin-bottom: 8px; }
.tim-so div { display: flex; gap: 8px; }
.tim-so input { flex: 1; min-width: 0; font-size: 18px; padding: 10px 12px; border: 2px solid var(--vien); border-radius: 10px; }
.tim-so input:focus { outline: none; border-color: var(--teal); }
.tim-so button { background: var(--teal); color: #fff; border: 0; border-radius: 10px; padding: 0 22px; font-size: 16px; font-weight: 600; cursor: pointer; }
.loi { color: #b3261e; margin: 8px 0 0; font-size: 14px; }

/* lọc + lưới */
.loc { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 18px; }
.chip { border: 1px solid var(--vien); background: var(--nen-the); color: var(--chu); border-radius: 999px; padding: 6px 16px; font-size: 14px; cursor: pointer; }
.chip.bat { background: var(--teal); border-color: var(--teal); color: #fff; }
.luoi { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; padding-bottom: 40px; }
.the { background: var(--nen-the); border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; text-decoration: none; color: inherit; transition: transform .15s, box-shadow .15s; }
.the:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(16, 117, 110, .12); }
.the[hidden] { display: none; }
.the-anh, .anh-chinh { position: relative; aspect-ratio: 1; background: #fff; }
.the-anh img, .anh-chinh img { width: 100%; height: 100%; object-fit: cover; }
.so { position: absolute; top: 10px; left: 10px; background: var(--vang); color: var(--teal-dam); font-weight: 800; padding: 2px 10px; border-radius: 8px; font-size: 15px; }
.the-chu { padding: 12px 14px 16px; }
.the-chu h3 { margin: 4px 0 6px; font-size: 17px; }
.the-chu p { margin: 0; font-size: 14px; color: var(--mo); }
.nhom { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--teal); }

/* trang sản phẩm */
.sp { display: grid; gap: 28px; padding-top: 24px; padding-bottom: 32px; }
@media (min-width: 860px) {
  .sp { grid-template-columns: 1fr 1fr; align-items: start; }
  .sp-anh { position: sticky; top: 80px; }
}
.anh-chinh { border-radius: var(--bo); overflow: hidden; border: 1px solid var(--vien); }
.thumbs { display: flex; gap: 8px; margin-top: 10px; overflow-x: auto; }
.thumb { flex: 0 0 64px; height: 64px; padding: 0; border: 2px solid transparent; border-radius: 10px; overflow: hidden; cursor: pointer; background: #fff; }
.thumb.bat { border-color: var(--teal); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.sp-chu h1 { font-size: clamp(24px, 4vw, 32px); margin: 6px 0 12px; }
.mo-dau { font-size: 17px; }
.nut-mua { display: block; text-align: center; background: var(--vang); color: var(--teal-dam); font-weight: 800; font-size: 17px; text-decoration: none; padding: 14px 18px; border-radius: 12px; margin-top: 16px; }
.nut-mua:hover { filter: brightness(1.05); }
.sp-chu > .nho { text-align: center; margin: 6px 0 20px; }
.hop { background: var(--nen-the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 14px 18px; margin-bottom: 14px; }
.hop h2 { font-size: 17px; margin: 0 0 6px; }
.hop ul { margin: 0; padding-left: 20px; }
.hop li { margin: 3px 0; }
.hop.xanh { border-left: 5px solid #2e9d63; }
.hop.do { border-left: 5px solid #d0573f; }
.hop.vang { border-left: 5px solid var(--vang); }
.hai-cot { display: grid; gap: 0 14px; }
@media (min-width: 520px) { .hai-cot { grid-template-columns: 1fr 1fr; } }
.luu-y { font-size: 14px; color: var(--mo); }
.tieu-de-phu { margin-top: 8px; }

/* video dọc, chỉ tải khi bấm */
.yt, .hop iframe { display: block; width: 100%; max-width: 320px; aspect-ratio: 9 / 16; border: 0; border-radius: 12px; overflow: hidden; margin: 8px auto 0; background: #000; }
.yt { position: relative; padding: 0; cursor: pointer; }
.yt img { width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.play { position: absolute; inset: 0; margin: auto; width: 68px; height: 68px; border-radius: 50%; background: rgba(0, 0, 0, .65); color: #fff; font-size: 28px; display: grid; place-items: center; }

/* nút mua dính đáy trên điện thoại */
.thanh-mua { display: none; }
@media (max-width: 859px) {
  .thanh-mua { display: block; position: sticky; bottom: 0; padding: 10px 16px; background: rgba(253, 250, 234, .96); border-top: 1px solid var(--vien); }
  .thanh-mua .nut-mua { margin: 0; }
}

/* văn bản */
.van-ban { max-width: 720px; padding-top: 28px; padding-bottom: 40px; }

/* chân trang */
.chan { background: var(--teal-dam); color: #e6f0ee; padding: 28px 0; font-size: 14px; }
.chan a { color: #fff; }
.chan .cong-khai { font-weight: 600; }
.chan .nho { color: #b9d3cf; }

/* chống tràn ngang trên điện thoại */
.sp > *, .luoi > *, .hai-cot > * { min-width: 0; }
.sp-chu { overflow-wrap: anywhere; }
@media (max-width: 420px) {
  .logo { font-size: 17px; }
  .dau nav a { margin-left: 12px; font-size: 14px; }
}

/* danh mục */
a.chip { text-decoration: none; display: inline-block; }
.vet { font-size: 14px; color: var(--mo); margin: 0 0 4px; }
.vet a { color: var(--mo); }
.dm-dau { padding-top: 28px; }
.dm-dau h1 { margin: 4px 0 6px; font-size: clamp(26px, 5vw, 36px); }
.dm-dau > p:last-child { color: var(--mo); margin: 0 0 8px; }

/* video nổi bật */
.co-video { position: absolute; right: 10px; bottom: 10px; display: inline-flex; align-items: center; gap: 6px;
  background: rgba(19, 87, 82, .78); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  color: #fff; font-size: 13px; font-weight: 700; padding: 4px 12px 4px 5px; border-radius: 999px; line-height: 1; }
.co-video svg, .xem-video svg { flex: none; display: block; }
.xem-video { display: inline-flex; align-items: center; gap: 8px; background: #fff; border: 2px solid var(--teal); color: var(--teal); font-weight: 700; font-size: 14px; padding: 5px 14px; border-radius: 999px; text-decoration: none; margin-bottom: 8px; }
.hop.video { text-align: center; scroll-margin-top: 80px; }
.hop.video h2 { text-align: left; }

/* tìm kiếm */
.tim-so { max-width: 560px; }
.tim-so input[type=search] { font-size: 17px; }
.goi-y { margin: 10px 0 0; font-size: 14px; color: var(--mo); }
.goi-y a { color: var(--teal); }
.ket-qua { font-weight: 600; color: var(--teal-dam); margin: 0 0 12px; }
.xem-video svg circle { fill: var(--teal); }
.xem-video svg path { fill: #fff; }

/* banner trang chủ (full khung) */
.hero { padding: 24px 0 8px; }
.banner { position: relative; overflow: hidden; display: grid; gap: 24px; align-items: center;
  background: radial-gradient(circle at 85% 15%, rgba(245, 166, 35, .35), transparent 40%),
              linear-gradient(135deg, var(--teal) 0%, var(--teal-dam) 100%);
  color: #fff; border-radius: 22px; padding: 40px 44px; }
.banner::before, .banner::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.banner::before { width: 340px; height: 340px; right: -120px; bottom: -160px; border: 40px solid rgba(255, 255, 255, .06); }
.banner::after { width: 140px; height: 140px; left: -50px; top: -60px; background: rgba(245, 166, 35, .18); }
@media (min-width: 860px) { .banner { grid-template-columns: 1.15fr 1fr; } }
.bn-chu { position: relative; z-index: 1; }
.bn-nhan { display: inline-block; background: rgba(255, 255, 255, .14); border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 999px; padding: 4px 14px; font-size: 13px; font-weight: 600; margin-bottom: 14px; }
.hero .banner h1 { color: #fff; font-size: clamp(30px, 5vw, 48px); margin: 0 0 14px; }
.banner mark { background: none; color: var(--vang); position: relative; }
.banner > .bn-chu > p { font-size: 18px; color: #dcebe8; max-width: 520px; margin: 0 0 18px; }
.bn-diem { list-style: none; padding: 0; margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.bn-diem li { background: #fff; color: var(--teal-dam); font-weight: 600; font-size: 14px; border-radius: 10px; padding: 6px 12px; }
.bn-diem b { margin-right: 4px; }
.bn-nut { display: inline-block; background: var(--vang); color: var(--teal-dam); font-weight: 800; text-decoration: none;
  padding: 12px 22px; border-radius: 12px; box-shadow: 0 6px 18px rgba(0, 0, 0, .18); }
.bn-nut:hover { filter: brightness(1.06); }
.bn-ghep { position: relative; z-index: 1; height: 340px; }
.bn-anh { position: absolute; display: block; width: 52%; aspect-ratio: 1; border-radius: 18px; overflow: hidden;
  border: 5px solid #fff; box-shadow: 0 14px 34px rgba(0, 0, 0, .28); background: #fff; transition: transform .2s; }
.bn-anh img { width: 100%; height: 100%; object-fit: cover; }
.bn-anh span { position: absolute; top: 8px; left: 8px; background: var(--vang); color: var(--teal-dam); font-weight: 800;
  font-size: 14px; padding: 1px 9px; border-radius: 7px; }
.bn-anh-1 { left: 24%; top: 8%; z-index: 3; transform: rotate(-2deg); width: 56%; }
.bn-anh-2 { left: 0; top: 30%; z-index: 2; transform: rotate(-9deg); }
.bn-anh-3 { right: 0; top: 34%; z-index: 1; transform: rotate(8deg); }
.bn-anh:hover { transform: rotate(0) scale(1.03); z-index: 4; }
@media (max-width: 859px) {
  .banner { padding: 28px 22px; border-radius: 18px; }
  .bn-ghep { height: 200px; max-width: 360px; width: 100%; margin: 0 auto; }
  .bn-anh-1 { top: 0; }
  .bn-anh-2, .bn-anh-3 { top: 18%; }
}
@media (max-width: 420px) {
  .banner > .bn-chu > p { font-size: 16px; }
  .bn-nut { display: block; text-align: center; }
}

/* ô tìm full khung */
.hero .tim-so { max-width: none; margin-top: 16px; padding: 18px 20px; box-shadow: 0 4px 16px rgba(16, 117, 110, .06); }
.hero .tim-so input[type=search] { padding: 12px 14px; }
.hero .tim-so button { padding: 0 32px; }
@media (min-width: 860px) { .banner { grid-template-columns: 1.35fr 1fr; } .hero .banner h1 { font-size: clamp(30px, 4.2vw, 46px); } }
@media (max-width: 599px) { .bn-ghep, .bn-nut { display: none; } .bn-diem { margin-bottom: 0; } }