/* A39 Hotel, a39.vn. Mau chu dao lay tu bo nhan dien A39 (#105B9C). */
:root {
  --xanh: #105B9C; --xanh-dam: #0B3F6E; --xanh-nhat: #E8F1F9; --cat: #E7C48B; --cat-dam: #B88A3E;
  --chu: #1E2A36; --chu-phu: #55636F; --nen: #FBFAF7; --the: #FFFFFF; --vien: #E3E6EA;
  --vang: #FFF3B0; --vang-vien: #E0B800;
  --r: 14px; --bong: 0 1px 2px rgba(16, 40, 70, .06), 0 8px 24px rgba(16, 40, 70, .06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif; color: var(--chu); background: var(--nen); line-height: 1.65; font-size: 16.5px; }
h1, h2, h3 { font-family: 'Playfair Display', Georgia, serif; color: var(--xanh-dam); line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
h3 { font-size: 1.25rem; }
a { color: var(--xanh); }
img { max-width: 100%; display: block; }
.khung { width: min(1120px, 100% - 32px); margin: 0 auto; }
.du-thao { background: var(--vang); border-bottom: 1px solid var(--vang-vien); text-align: center; font-size: .9rem; padding: 6px 16px; }
.can-dien { color: #3A2E00; background: var(--vang); outline: 1px dashed var(--vang-vien); padding: 0 4px; border-radius: 4px; font-weight: 500; }

/* dau trang */
.dau { position: sticky; top: 0; z-index: 20; background: rgba(251, 250, 247, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--vien); }
.dau .khung { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 16px; }
.dau .logo img { height: 52px; width: auto; }
.menu { display: flex; align-items: center; gap: 2px; }
.menu a { text-decoration: none; color: var(--chu); font-weight: 500; font-size: .95rem; padding: 8px 12px; border-radius: 8px; }
.menu a:hover { background: var(--xanh-nhat); color: var(--xanh); }
.mo-menu { display: none; background: none; border: 1px solid var(--vien); border-radius: 10px; padding: 8px 12px; font: inherit; color: var(--xanh); }

.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none; font-weight: 600; border-radius: 12px; padding: 13px 20px; border: 1px solid transparent; transition: transform .15s, background .15s; }
.nut:hover { transform: translateY(-1px); }
.nut-chinh { background: var(--xanh); color: #fff !important; }
.nut-chinh:hover { background: var(--xanh-dam); }
.nut-cat { background: var(--cat); color: var(--xanh-dam) !important; }
.nut-vien { border-color: rgba(255, 255, 255, .6); color: #fff !important; }
.nut-vien-xanh { border-color: var(--xanh); color: var(--xanh) !important; background: #fff; }
.menu .nut { margin-left: 8px; padding: 10px 16px; }

/* mo dau */
.mo-dau { background: linear-gradient(140deg, var(--xanh-dam) 0%, var(--xanh) 55%, #2E7BBE 100%); color: #EAF2FA; position: relative; overflow: hidden; }
.mo-dau::before { content: ''; position: absolute; inset: auto -10% -55% -10%; height: 70%; background: radial-gradient(60% 60% at 50% 0%, rgba(231, 196, 139, .35), transparent 70%); }
.mo-dau .khung { position: relative; z-index: 1; display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; padding: clamp(56px, 9vw, 104px) 0; }
.mo-dau h1 { color: #fff; }
.mo-dau .nhan { color: var(--cat); font-weight: 600; letter-spacing: .14em; text-transform: uppercase; font-size: .82rem; margin-bottom: 14px; }
.mo-dau .phu { font-size: 1.1rem; color: #D6E4F2; max-width: 34em; }
.mo-dau .nhom-nut { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.the-nhanh { background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .22); border-radius: 18px; padding: 24px 26px; }
.the-nhanh dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 10px 16px; }
.the-nhanh dt { color: var(--cat); font-weight: 600; font-size: .9rem; }
.the-nhanh dd { margin: 0; color: #fff; }

/* muc */
.muc { padding: clamp(56px, 8vw, 92px) 0; }
.muc-nen { background: #fff; border-top: 1px solid var(--vien); border-bottom: 1px solid var(--vien); }
.tieu-de-muc { max-width: 720px; margin-bottom: 34px; }
.tieu-de-muc .nhan { color: var(--cat-dam); font-weight: 600; letter-spacing: .14em; text-transform: uppercase; font-size: .8rem; }
.tieu-de-muc p { color: var(--chu-phu); margin: 0; }
.luoi { display: grid; gap: 22px; }
.luoi-4 { grid-template-columns: repeat(4, 1fr); }
.luoi-3 { grid-template-columns: repeat(3, 1fr); }
.luoi-2 { grid-template-columns: repeat(2, 1fr); }
.the { background: var(--the); border: 1px solid var(--vien); border-radius: var(--r); box-shadow: var(--bong); overflow: hidden; }
.the .than { padding: 20px 22px 22px; }
.anh-cho { aspect-ratio: 4 / 3; background: repeating-linear-gradient(135deg, var(--xanh-nhat) 0 14px, #F3F7FB 14px 28px); display: flex; align-items: center; justify-content: center; text-align: center; padding: 12px; font-size: .85rem; color: var(--chu-phu); }
.phong .gia { font-size: 1.35rem; font-weight: 700; color: var(--xanh); }
.phong .gia small { font-size: .85rem; font-weight: 500; color: var(--chu-phu); }
.phong ul { margin: 10px 0 0; padding-left: 18px; color: var(--chu-phu); font-size: .95rem; }
.huy-hieu { display: inline-block; background: var(--xanh-nhat); color: var(--xanh); font-size: .78rem; font-weight: 600; border-radius: 999px; padding: 2px 10px; margin-bottom: 8px; }

table.bang { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--r); overflow: hidden; box-shadow: var(--bong); }
.bang th, .bang td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--vien); }
.bang th { background: var(--xanh); color: #fff; font-weight: 600; font-size: .92rem; }
.bang td.so { font-variant-numeric: tabular-nums; white-space: nowrap; }
.cuon-ngang { overflow-x: auto; border-radius: var(--r); }
.ghi-chu { color: var(--chu-phu); font-size: .93rem; margin-top: 14px; }

.tien-ich { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 22px; }
.tien-ich li { position: relative; padding-left: 28px; }
.tien-ich li::before { content: ''; position: absolute; left: 0; top: .45em; width: 16px; height: 16px; border-radius: 50%; background: var(--xanh-nhat); border: 2px solid var(--xanh); }

.bai { max-width: 780px; }
.bai h2 { margin-top: 1.6em; }
.bai h2:first-child { margin-top: 0; }
.bai ul { padding-left: 20px; }
.bai li { margin: .3em 0; }

.duong-dan { font-size: .88rem; color: #C9D8E8; margin-bottom: 10px; }
.duong-dan a { color: #fff; }
.dau-trang { background: linear-gradient(140deg, var(--xanh-dam), var(--xanh)); color: #E3EDF7; padding: 52px 0 46px; }
.dau-trang h1 { color: #fff; font-size: clamp(1.8rem, 4vw, 2.6rem); }

.loi-goi { background: var(--xanh-dam); color: #E3EDF7; border-radius: 22px; padding: 34px 36px; display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap; }
.loi-goi h2 { color: #fff; margin: 0 0 6px; }
.loi-goi p { margin: 0; }

.chan { background: #0A2E50; color: #BFD0E2; padding: 48px 0 28px; font-size: .93rem; }
.chan .luoi { grid-template-columns: 1.4fr 1fr 1fr; }
.chan h4 { color: #fff; margin: 0 0 10px; font-size: 1rem; }
.chan a { color: #E2ECF6; }
.chan ul { list-style: none; padding: 0; margin: 0; }
.chan li { margin: 6px 0; }
.chan .logo img { height: 56px; width: auto; margin-bottom: 12px; }
.chan .duoi { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 30px; padding-top: 18px; font-size: .85rem; color: #93A9C0; }

@media (max-width: 980px) {
  .luoi-4 { grid-template-columns: repeat(2, 1fr); }
  .luoi-3, .tien-ich { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .mo-dau .khung, .luoi-2, .chan .luoi { grid-template-columns: 1fr; }
  .mo-menu { display: inline-block; }
  .menu { display: none; position: absolute; top: 76px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--nen); border-bottom: 1px solid var(--vien); padding: 10px 16px 16px; }
  .menu.mo { display: flex; }
  .menu .nut { margin: 8px 0 0; }
  .loi-goi { padding: 26px 22px; }
}
@media (max-width: 520px) {
  .luoi-4, .luoi-3, .tien-ich { grid-template-columns: 1fr; }
  .dau .logo img { height: 44px; }
}

/* chon ngon ngu */
.chon-nn { display: flex; gap: 2px; margin-left: 10px; padding-left: 10px; border-left: 1px solid var(--vien); }
.chon-nn a { font-size: .82rem; padding: 6px 7px; color: var(--chu-phu); }
.chon-nn a[aria-current] { color: var(--xanh); font-weight: 700; background: var(--xanh-nhat); }
/* chu Han, Han Quoc: Playfair, Be Vietnam Pro khong co net, dung phong he thong */
:lang(zh) body, html:lang(zh) { font-family: 'Be Vietnam Pro', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif; }
:lang(ko) body, html:lang(ko) { font-family: 'Be Vietnam Pro', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Noto Sans KR', sans-serif; }
html:lang(zh) h1, html:lang(zh) h2, html:lang(zh) h3 { font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif; }
html:lang(ko) h1, html:lang(ko) h2, html:lang(ko) h3 { font-family: 'Noto Serif KR', 'Nanum Myeongjo', 'Batang', serif; }

/* bieu mau dat phong */
.khung-hep { width: min(720px, 100% - 32px); margin: 0 auto; }
.luu-y { background: var(--xanh-nhat); border-left: 4px solid var(--xanh); border-radius: 0; padding: 12px 16px; margin: 0 0 20px; }
.bieu-mau { padding: 24px; display: grid; gap: 16px; }
.o-truong label, .o-truong .nhan-o { display: block; font-weight: 600; margin-bottom: 6px; }
.o-truong input:not([type=checkbox]):not([type=radio]), .o-truong select, .o-truong textarea {
  width: 100%; font: inherit; padding: 11px 12px; border: 1px solid #C9D1DA; border-radius: 10px; background: #fff; color: var(--chu); }
.o-truong input:focus, .o-truong select:focus, .o-truong textarea:focus { outline: 2px solid var(--xanh); outline-offset: 1px; border-color: var(--xanh); }
.o-truong small { display: block; color: var(--chu-phu); margin-top: 4px; font-size: .85rem; }
.o-truong.loi input, .o-truong.loi select, .o-truong.loi textarea { border-color: #C62828; background: #FFF5F5; }
.o-truong.loi label, .o-truong.loi .nhan-o { color: #C62828; }
.o-dong-y label { font-weight: 400; display: flex; gap: 10px; align-items: flex-start; }
.o-dong-y input { margin-top: 5px; width: 18px; height: 18px; flex: none; }
.chon-kieu { display: flex; gap: 18px; flex-wrap: wrap; }
.chon-kieu label { font-weight: 500; display: flex; gap: 6px; align-items: center; margin: 0; }
.hai-cot { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.o-an { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bao-loi { color: #C62828; background: #FFF5F5; border: 1px solid #F3C2C2; border-radius: 10px; padding: 10px 14px; margin: 0; }
.nut-rong { width: 100%; font-size: 1.05rem; padding: 15px; border: none; cursor: pointer; }
.nut-rong:disabled { opacity: .6; cursor: wait; }
.xong { border-left: 5px solid #2E7D32; }
[hidden] { display: none !important; }
@media (max-width: 760px) {
  .chon-nn { margin: 10px 0 0; padding: 10px 0 0; border-left: 0; border-top: 1px solid var(--vien); flex-wrap: wrap; }
  .hai-cot { grid-template-columns: 1fr; }
  .bieu-mau { padding: 18px; }
}