/* Màu, font và bo góc lấy từ theme của ERP tạm (frontend/src/theme.css). */
/* Màu, font và bo góc lấy từ theme của ERP tạm (frontend/src/theme.css).
   Giao diện sáng/tối: theme.js đặt <html data-theme="light|dark">, xem bảng màu tối ngay dưới. */
:root {
  color-scheme: light;
  --navy: #1F1650;
  --navy-2: #2C2270;
  --vang: #F5CB14;
  --vang-dam: #EBC000;
  --vang-nhat: #FFEC9C;
  --vang-nen: #FFF8D9;
  --vang-vien: #F1DC7A;
  --tren-vang: #1F1650;
  --nen: #FAFAF7;
  --mat: #FFFFFF;
  --mat-2: #F7F7FA;
  --vien: #ECEAE2;
  --vien-dam: #CFCBE0;
  --line: #F0F0F5;
  --chu: #1F1650;
  --chu-mo: #6B6880;
  --do: #C33636;
  --do-nen: #FDECEC;
  --do-nen-nhat: #FFF7F7;
  --do-vien: #F3C9C9;
  --xanh: #237A46;
  --xanh-nen: #E7F4EC;
  --cam: #8A5A00;
  --cam-nen: #FFF4D1;
  --lam: #2F4FB5;
  --lam-nen: #E8EEFD;
  --tim: #5B3DB5;
  --tim-nen: #EDE7FB;
  --xam: #77758A;
  --xam-dam: #55536A;
  --xam-nen: #EEEEF2;
  --hang-hover: #FCFBF6;
  --thanh-ben: var(--navy);
  --thanh-ben-vien: transparent;
  --cot: var(--navy);
  --cot-hover: #5B4FB0;
  --noi-tu: #FFDC43;
  --noi-den: #FFF6CC;
  --dn-nen: linear-gradient(160deg, #FFDC43 0%, #FFF8DE 45%, var(--nen) 100%);
  --bong: rgba(31,22,80,.14);
  --bong-dam: rgba(31,22,80,.25);
  --phu-toi: rgba(31,22,80,.35);
  --r: 10px;
  --font-body: "Alexandria", system-ui, sans-serif;
  --font-head: "Manrope", system-ui, sans-serif;
}
/* Bảng màu tối. Chế độ "theo máy" cũng đi qua đây: theme.js luôn đặt data-theme theo màu đang dùng. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --navy: #3A2F8C;
  --navy-2: #463AA0;
  --vang-dam: #D9B30A;
  --vang-nhat: #5A4A10;
  --vang-nen: #2A2410;
  --vang-vien: #5C4B12;
  --nen: #100E1C;
  --mat: #1A1729;
  --mat-2: #221E35;
  --vien: #2F2A47;
  --vien-dam: #48416A;
  --line: #262139;
  --chu: #E9E7F4;
  --chu-mo: #A29EBA;
  --do: #F07575;
  --do-nen: #3A1B22;
  --do-nen-nhat: #261519;
  --do-vien: #6A2E36;
  --xanh: #5CCB8A;
  --xanh-nen: #15301F;
  --cam: #F2B544;
  --cam-nen: #332611;
  --lam: #8DA6F5;
  --lam-nen: #1C2645;
  --tim: #B39CF5;
  --tim-nen: #2A2148;
  --xam: #A3A1B5;
  --xam-dam: #C2C0D2;
  --xam-nen: #2A2738;
  --hang-hover: #211D33;
  --thanh-ben: #15122A;
  --thanh-ben-vien: #2A2545;
  --cot: #8E80E8;
  --cot-hover: #B3A8F5;
  --noi-tu: #4A3D0A;
  --noi-den: #2A2412;
  --dn-nen: linear-gradient(160deg, #2C2470 0%, #17132E 50%, var(--nen) 100%);
  --bong: rgba(0,0,0,.35);
  --bong-dam: rgba(0,0,0,.5);
  --phu-toi: rgba(5,3,15,.6);
}
* { box-sizing: border-box; }
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: var(--font-body); font-weight: 300; font-size: 14.5px; color: var(--chu); background: var(--nen); line-height: 1.5; }
h1, h2, h3, .head { font-family: var(--font-head); font-weight: 800; margin: 0; letter-spacing: -.01em; }
a { color: inherit; }
b, strong, th { font-weight: 500; }

/* ---- khung ---- */
.khung { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.thanh-ben { background: var(--thanh-ben); border-right: 1px solid var(--thanh-ben-vien); color: #fff; padding: 18px 14px; position: sticky; top: 0; z-index: 20; height: 100vh; display: flex; flex-direction: column; gap: 4px; }
.logo { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; text-decoration: none; }
.logo img { width: 36px; height: 36px; background: #fff; border-radius: 9px; padding: 3px; }
.logo span { font-family: var(--font-head); font-weight: 800; font-size: 16px; line-height: 1.1; }
.logo small { display: block; font-weight: 500; font-size: 11px; color: var(--vang); letter-spacing: .06em; text-transform: uppercase; }
.nhom-menu { font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: rgba(255,255,255,.45); padding: 14px 10px 4px; }
.menu { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 9px; text-decoration: none; color: rgba(255,255,255,.85); font-weight: 400; }
.menu:hover { background: rgba(255,255,255,.08); color: #fff; }
.menu.dang { background: var(--vang); color: var(--tren-vang); font-weight: 500; }
.menu svg { width: 18px; height: 18px; flex: none; }
/* chân thanh bên: người dùng + menu bánh răng (giao diện, vai trò, đăng xuất) */
.thanh-ben .cuoi { margin-top: auto; position: relative; padding: 10px 4px 0; border-top: 1px solid rgba(255,255,255,.12); }
.nguoi-dung { display: flex; align-items: center; gap: 10px; }
.anh-dai-dien { width: 32px; height: 32px; flex: none; border-radius: 50%; background: var(--vang); color: var(--tren-vang); display: grid; place-items: center; font: 800 14px var(--font-head); }
.nguoi-dung .ten { flex: 1; min-width: 0; line-height: 1.3; }
.nguoi-dung .ten b { display: block; color: #fff; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nguoi-dung .ten small { display: block; color: rgba(255,255,255,.55); font-size: 11.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.banh-rang { flex: none; display: grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 8px; background: none; color: rgba(255,255,255,.7); cursor: pointer; }
.banh-rang:hover, .banh-rang.dang { background: rgba(255,255,255,.1); color: #fff; }
.banh-rang svg { width: 18px; height: 18px; transition: transform .2s; }
.banh-rang.dang svg { transform: rotate(45deg); }
.menu-nd { position: absolute; z-index: 85; left: 0; right: 0; bottom: calc(100% + 6px); background: var(--mat); color: var(--chu); border: 1px solid var(--vien); border-radius: 12px; box-shadow: 0 12px 30px var(--bong-dam); padding: 5px; font-size: 13.5px; }
.menu-nd hr { border: 0; border-top: 1px solid var(--line); margin: 4px 2px; }
.menu-nd form { margin: 0; }
.muc-nd { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border: 0; border-radius: 8px; background: none; color: inherit; font: 400 13.5px var(--font-body); text-align: left; text-decoration: none; cursor: pointer; }
.muc-nd:hover, .co-con:hover > .muc-nd { background: var(--mat-2); }
.muc-nd svg { width: 17px; height: 17px; flex: none; color: var(--chu-mo); }
.muc-nd .mui-ten { width: 14px; height: 14px; margin-left: auto; }
.muc-nd .dau-tich { margin-left: auto; font-weight: 500; }
.co-con { position: relative; }
/* menu con mở sang phải; khoảng đệm trái giữ hover khi rê chuột qua khe hở */
.menu-nd.menu-con { left: 100%; right: auto; bottom: auto; top: -5px; width: 160px; margin-left: 4px; }
.menu-nd.menu-con::before { content: ""; position: absolute; top: 0; bottom: 0; left: -10px; width: 10px; }

.chinh { padding: 22px 28px 60px; min-width: 0; }
.dau-trang { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.dau-trang h1 { font-size: 24px; }
.dau-trang .phu { color: var(--chu-mo); font-size: 13.5px; }
.dau-trang .phai { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.nut.nut-menu { display: none; }

/* ---- thẻ, lưới ---- */
.the { background: var(--mat); border: 1px solid var(--vien); border-radius: 14px; padding: 18px; }
.the + .the { margin-top: 16px; }
.the h2 { font-size: 16px; margin-bottom: 12px; }
.luoi { display: grid; gap: 16px; }
.luoi-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.luoi-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.luoi-3-1 { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
.so-lieu { background: var(--mat); border: 1px solid var(--vien); border-radius: 14px; padding: 16px 18px; position: relative; overflow: hidden; }
.so-lieu .nhan { font-size: 12.5px; color: var(--chu-mo); }
.so-lieu .gt { font-family: var(--font-head); font-weight: 800; font-size: 26px; margin-top: 2px; font-variant-numeric: tabular-nums; }
.so-lieu .gt small { font-size: 13px; font-weight: 500; color: var(--chu-mo); }
.so-lieu.noi { background: linear-gradient(160deg, var(--noi-tu) 0%, var(--noi-den) 100%); border-color: var(--vang-vien); }
.so-lieu.canh { background: var(--do-nen); border-color: var(--do-vien); }
.so-lieu.canh .gt { color: var(--do); }
.so-lieu a { position: absolute; inset: 0; }
.so-lieu.canh-vang { background: var(--cam-nen); border-color: var(--vang-vien); }
.luoi-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---- nút ---- */
.nut { display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px; border-radius: 9px; border: 1px solid var(--vien); background: var(--mat); color: var(--chu); font: 500 14px var(--font-body); cursor: pointer; text-decoration: none; white-space: nowrap; }
.nut:hover { border-color: var(--vien-dam); background: var(--mat-2); }
.nut.chinh-nut { background: var(--vang); border-color: var(--vang); color: var(--tren-vang); }
.nut.chinh-nut:hover { background: var(--vang-dam); }
.nut.toi { background: var(--navy); border-color: var(--navy); color: #fff; }
.nut.toi:hover { background: var(--navy-2); }
.nut.do { color: var(--do); }
.nut.do:hover { background: var(--do-nen); border-color: var(--do-vien); }
.nut.nho { padding: 5px 10px; font-size: 13px; }
.nut.icon { padding: 6px 8px; }
.nut svg { width: 16px; height: 16px; }
.nut[disabled] { opacity: .5; cursor: not-allowed; }

/* ---- bảng ---- */
.bang-boc { overflow-x: auto; }
table.bang { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.bang th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--chu-mo); padding: 9px 10px; border-bottom: 1px solid var(--vien); background: var(--mat-2); white-space: nowrap; }
.bang td { padding: 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.bang tr:hover td { background: var(--hang-hover); }
.bang tr.bam { cursor: pointer; }
.bang .so, .bang th.so { text-align: right; white-space: nowrap; }
.bang tfoot td { font-weight: 500; background: var(--vang-nen); border-top: 1px solid var(--vang-vien); }
.bang tfoot tr.phu td { font-weight: 400; background: var(--mat); border-top: 0; }
.bang .mo { color: var(--chu-mo); font-size: 13px; }
.bang tr.negative td { background: var(--do-nen-nhat); }
.am-so { color: var(--do); font-weight: 500; }
.xanh-so { color: var(--xanh); }
.rong { text-align: center; color: var(--chu-mo); padding: 36px 10px !important; }

/* ---- nhãn trạng thái ---- */
.nhan { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; font-weight: 500; padding: 3px 10px; border-radius: 20px; white-space: nowrap; }
.nhan::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.nhan.st-pending, .nhan.st-draft { background: var(--cam-nen); color: var(--cam); }
.nhan.st-approved { background: var(--lam-nen); color: var(--lam); }
.nhan.st-loading, .nhan.st-shipping { background: var(--tim-nen); color: var(--tim); }
.nhan.st-delivered { background: var(--xanh-nen); color: var(--xanh); }
.nhan.st-cancelled, .nhan.st-rejected { background: var(--xam-nen); color: var(--xam); }
a.nhan { text-decoration: none; }
.nhan.canh { background: var(--do-nen); color: var(--do); }
.nhan.xam { background: var(--xam-nen); color: var(--xam-dam); }
.nhan.xam::before { display: none; }

/* ---- bộ lọc ---- */
.loc { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.o, select.o, textarea.o { font: 300 14px var(--font-body); color: var(--chu); background: var(--mat); border: 1px solid var(--vien); border-radius: 9px; padding: 8px 11px; min-width: 0; }
.o:focus { outline: 2px solid var(--vang); outline-offset: -1px; border-color: var(--vang); }
.o.tim { min-width: 240px; padding-left: 34px; background: var(--mat) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236B6880' stroke-width='2' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 11px center; }
.tab { display: inline-flex; background: var(--mat-2); border: 1px solid var(--vien); border-radius: 10px; padding: 3px; gap: 2px; flex-wrap: wrap; }
.tab a, .tab button { border: 0; background: none; font: 400 13.5px var(--font-body); color: var(--chu-mo); padding: 6px 12px; border-radius: 7px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.tab a.dang, .tab button.dang { background: var(--mat); color: var(--chu); font-weight: 500; box-shadow: 0 1px 2px var(--bong); }
.tab .dem { font-size: 11.5px; background: var(--line); border-radius: 10px; padding: 0 6px; margin-left: 4px; }

/* ---- form ---- */
.truong { display: flex; flex-direction: column; gap: 5px; }
.truong label { font-size: 12.5px; color: var(--chu-mo); font-weight: 400; }
.truong .o { width: 100%; }
.form-luoi { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.form-luoi .rong-2 { grid-column: span 2; }
.form-luoi .rong-4 { grid-column: 1 / -1; }
.loi-form { background: var(--do-nen); color: var(--do); border: 1px solid var(--do-vien); border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; }
.errorlist { color: var(--do); font-size: 12.5px; list-style: none; padding: 0; margin: 2px 0 0; }

/* bảng nhập dòng hàng: không cắt overflow để danh sách gợi ý hiện hết */
.bang-dong { overflow: visible; }
.dong-hang td { padding: 6px; }
.dong-hang .o { width: 100%; padding: 7px 9px; }
.dong-hang input[type=number] { text-align: right; }
.dong-hang .xoa-dong { color: var(--chu-mo); background: none; border: 0; cursor: pointer; font-size: 18px; line-height: 1; padding: 4px 8px; border-radius: 6px; }
.dong-hang .xoa-dong:hover { background: var(--do-nen); color: var(--do); }
.ton-nho { font-size: 11.5px; color: var(--chu-mo); }
.ton-nho.am { color: var(--do); }
.tong-don { display: flex; justify-content: flex-end; gap: 28px; align-items: baseline; padding: 14px 6px 0; }
.tong-don .so-to { font-family: var(--font-head); font-weight: 800; font-size: 24px; }

/* combobox chọn sản phẩm / khách */
.chon { position: relative; }
.chon .ds { position: absolute; z-index: 40; left: 0; right: 0; top: calc(100% + 4px); background: var(--mat); border: 1px solid var(--vien); border-radius: 10px; box-shadow: 0 12px 30px var(--bong); max-height: 300px; overflow: auto; padding: 4px; min-width: 320px; }
.chon .muc { padding: 7px 10px; border-radius: 7px; cursor: pointer; display: flex; justify-content: space-between; gap: 10px; }
.chon .muc.sang, .chon .muc:hover { background: var(--vang-nen); }
.chon .muc small { color: var(--chu-mo); }
.chon .muc .ben-phai { text-align: right; white-space: nowrap; font-size: 12.5px; }
.chon-select { display: inline-block; min-width: 180px; }
.truong .chon-select, .form-don .chon-select { display: block; }
.chon-select > button.o { width: 100%; text-align: left; cursor: pointer; padding-right: 30px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background-image: linear-gradient(45deg, transparent 50%, var(--chu-mo) 50%), linear-gradient(135deg, var(--chu-mo) 50%, transparent 50%);
  background-position: calc(100% - 15px) 52%, calc(100% - 10px) 52%; background-size: 5px 5px; background-repeat: no-repeat; }
.chon-select > button.o.mo-chu { color: var(--chu-mo); }
.chon-select .ds { min-width: 240px; }
.chon-select .ds > input.o { width: 100%; margin-bottom: 4px; }
.chon .them { border-top: 1px solid var(--line); margin-top: 4px; padding-top: 6px; }

/* ---- biểu đồ cột ---- */
.cot-bd { display: flex; align-items: flex-end; gap: 3px; height: 180px; padding-top: 8px; }
.cot-bd .c { flex: 1; min-width: 4px; display: flex; flex-direction: column; justify-content: flex-end; height: 100%; position: relative; }
.cot-bd .c i { display: block; background: var(--cot); border-radius: 4px 4px 0 0; min-height: 2px; transition: background .15s; }
.cot-bd .c.hn i { background: var(--vang); }
.cot-bd .c:hover i { background: var(--cot-hover); }
.cot-bd .c .tip { display: none; position: absolute; bottom: calc(100% + 6px); left: 50%; transform: translateX(-50%); background: var(--navy); color: #fff; font-size: 12px; padding: 5px 9px; border-radius: 7px; white-space: nowrap; z-index: 5; pointer-events: none; }
.cot-bd .c:hover .tip { display: block; }
.truc-x { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--chu-mo); margin-top: 6px; }
.thanh-ngang { height: 8px; background: var(--line); border-radius: 5px; overflow: hidden; margin-top: 4px; }
.thanh-ngang i { display: block; height: 100%; background: var(--cot); border-radius: 5px; }

/* ---- hộp thoại, thông báo ---- */
.man-toi { position: fixed; inset: 0; background: var(--phu-toi); z-index: 90; display: flex; align-items: flex-start; justify-content: center; padding: 8vh 16px 16px; overflow: auto; }
.hop { background: var(--mat); border-radius: 16px; width: 100%; max-width: 560px; padding: 22px; box-shadow: 0 30px 60px var(--bong-dam); }
.hop h2 { font-size: 18px; margin-bottom: 16px; }
.hop .chan { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.hop .form-luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.toast-boc { position: fixed; right: 18px; bottom: 18px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast { background: var(--navy); color: #fff; border-radius: 10px; padding: 11px 16px; box-shadow: 0 10px 30px var(--bong-dam); font-size: 14px; max-width: 380px; border-left: 4px solid var(--vang); }
.toast.warning { border-left-color: #F29B38; }

.loading-bar { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 200; background: var(--vang); transform-origin: left; opacity: 0; }
.htmx-request.loading-bar, .htmx-request .loading-bar { opacity: 1; animation: chay 1s ease-in-out infinite; }
@keyframes chay { from { transform: scaleX(0); } to { transform: scaleX(1); } }
[x-cloak] { display: none !important; }

.ghi-chu { background: var(--vang-nen); border: 1px solid var(--vang-vien); border-radius: 10px; padding: 10px 14px; font-size: 13.5px; }
.ghi-chu.do { background: var(--do-nen); border-color: var(--do-vien); color: var(--do); }
.hang { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.mo { color: var(--chu-mo); }
.phan-trang { display: flex; gap: 6px; align-items: center; justify-content: flex-end; padding-top: 12px; font-size: 13px; color: var(--chu-mo); }
dl.tt { display: grid; grid-template-columns: 130px 1fr; gap: 8px 12px; margin: 0; }
dl.tt dt { color: var(--chu-mo); font-size: 13px; }
dl.tt dd { margin: 0; }

/* ---- quy trình đơn hàng ---- */
.buoc { display: flex; margin-bottom: 16px; background: var(--mat); border: 1px solid var(--vien); border-radius: 14px; padding: 14px 18px; overflow-x: auto; }
.buoc > div { flex: 1; min-width: 96px; position: relative; text-align: center; font-size: 12.5px; color: var(--chu-mo); }
.buoc > div::before { content: ""; position: absolute; top: 8px; left: -50%; right: 50%; height: 3px; background: var(--line); }
.buoc > div:first-child::before { display: none; }
.buoc i { position: relative; display: block; width: 18px; height: 18px; margin: 0 auto 6px; border-radius: 50%; background: var(--line); border: 3px solid var(--mat); box-shadow: 0 0 0 1px var(--vien); }
.buoc > div.xong { color: var(--chu); font-weight: 500; }
.buoc > div.xong i { background: var(--vang); box-shadow: 0 0 0 1px var(--vang-dam); }
.buoc > div.xong::before { background: var(--vang); }
.form-don { display: flex; flex-direction: column; gap: 8px; }
.form-don label { font-size: 12.5px; color: var(--chu-mo); }

/* ---- lịch sử ---- */
.lich-su { margin-top: 16px; }
.ls-dong { display: grid; grid-template-columns: 14px 1fr; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.ls-dong:last-child { border-bottom: 0; }
.ls-cham { width: 10px; height: 10px; border-radius: 50%; background: var(--vien-dam); margin-top: 6px; }
.ls-cham.ls-approved, .ls-cham.ls-payment_added { background: var(--xanh); }
.ls-cham.ls-rejected, .ls-cham.ls-cancelled { background: var(--do); }
.ls-cham.ls-status_changed, .ls-cham.ls-discount_changed { background: var(--vang); }
.ls-doi { color: var(--chu-mo); font-size: 13px; }
.ls-ghi { background: var(--mat-2); border-radius: 8px; padding: 4px 8px; margin-top: 4px; font-size: 13px; }

/* ---- khách hàng ---- */
.the-khach { display: flex; gap: 18px; flex-wrap: wrap; align-items: flex-start; }
.kh-tt { flex: 1; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px 18px; min-width: 260px; }
.kh-tt .rong-2 { grid-column: span 2; }
.kh-tt .nhan-nho { font-size: 12px; color: var(--chu-mo); }
.kh-tt .ck { font-family: var(--font-head); font-weight: 800; font-size: 20px; }
.kh-nut { justify-content: flex-end; }
.ds-quyen { display: flex; flex-wrap: wrap; gap: 6px; }
.ds-quyen code { background: var(--mat-2); border: 1px solid var(--vien); border-radius: 6px; padding: 2px 7px; font-size: 12.5px; }

/* ---- đăng nhập ---- */
.dn { min-height: 100vh; display: grid; place-items: center; background: var(--dn-nen); padding: 16px; }
.dn .hop { max-width: 380px; }
.dn .logo-to { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.dn .logo-to img { width: 48px; height: 48px; }

/* ---- điện thoại ---- */
/* ---- hướng dẫn sử dụng: nút ?, khung bên phải, trang /help/ ---- */
.nut.nut-hoi { width: 34px; justify-content: center; font: 800 15px var(--font-head); border-radius: 50%; }
.hd-nen { position: fixed; inset: 0; background: var(--phu-toi); z-index: 85; }
.hd-khung { position: fixed; top: 0; right: 0; bottom: 0; z-index: 86; width: min(440px, 100vw); background: var(--mat); border-left: 1px solid var(--vien); box-shadow: -20px 0 40px var(--bong); display: flex; flex-direction: column; }
.hd-dau { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--vien); font-family: var(--font-head); }
#hd-noi-dung { overflow-y: auto; padding: 4px 18px 24px; }
.huong-dan { line-height: 1.6; font-size: 14px; }
.huong-dan h2 { font-size: 17px; margin: 16px 0 6px; }
.huong-dan h3 { font-size: 14.5px; margin: 16px 0 6px; }
.huong-dan p, .huong-dan ul, .huong-dan ol { margin: 0 0 8px; }
.huong-dan ul, .huong-dan ol { padding-left: 22px; }
.huong-dan li + li { margin-top: 4px; }
.huong-dan .meo { background: var(--vang-nen); border: 1px solid var(--vang-vien); border-radius: 10px; padding: 9px 13px; margin: 10px 0; font-size: 13.5px; }
.huong-dan .nhan { display: inline-block; background: var(--xam-nen); border-radius: 6px; padding: 0 7px; font-size: 13px; white-space: nowrap; }
.huong-dan .phim { display: inline-block; min-width: 20px; text-align: center; border: 1px solid var(--vien-dam); border-bottom-width: 2px; border-radius: 5px; padding: 0 5px; font-size: 12.5px; }
.hd-cuoi { margin-top: 18px; padding-top: 12px; border-top: 1px solid var(--vien); }
.hd-trang { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 16px; align-items: start; }
.hd-trang .huong-dan h2:first-child { margin-top: 0; }
.hd-trang .huong-dan { scroll-margin-top: 16px; }
.hd-muc-luc { position: sticky; top: 16px; display: flex; flex-direction: column; gap: 2px; padding: 10px; }
.hd-muc-luc a { color: var(--chu); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 14px; }
.hd-muc-luc a:hover { background: var(--mat-2); }

@media (max-width: 900px) {
  .khung { grid-template-columns: 1fr; }
  .thanh-ben { position: fixed; z-index: 80; left: 0; top: 0; width: 250px; transform: translateX(-100%); transition: transform .2s; }
  .menu-nd.menu-con { position: static; width: auto; margin: 2px 0 0 18px; box-shadow: none; border: 0; padding: 0; }
  .thanh-ben.mo-ra { transform: none; box-shadow: 0 0 0 100vmax var(--phu-toi); }
  .nut.nut-menu { display: inline-flex; }
  .chinh { padding: 14px 16px 60px; }
  .luoi-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .luoi-2, .luoi-3-1, .luoi-3 { grid-template-columns: 1fr; }
  .kh-tt { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .o.tim { min-width: 0; flex: 1 1 200px; }
  .an-dt { display: none; }
  .bang-boc > table.bang { min-width: 520px; }
  .hd-trang { grid-template-columns: 1fr; }
  .hd-muc-luc { position: static; flex-direction: row; flex-wrap: wrap; }
}
@media print {
  .thanh-ben, .dau-trang .phai, .loc, .nut, .hd-muc-luc, .hd-khung, .hd-nen { display: none !important; }
  .hd-trang { display: block; }
  .khung { display: block; }
}