:root {
  --bg: #F5F6F9; --surface: #FFFFFF; --fg: #0E1B36; --muted: #5E6A84; --faint: #9AA3B7;
  --line: #E4E8F0; --line-strong: #CDD4E2;
  --navy: #14306A; --navy-soft: #E9EEF8; --sel: #2F6FD1; --on-navy: #FFFFFF;
  --gold: #B8861A; --gold-fill: #D6A53A; --gold-soft: #FBF3DF;
  --ok: #17804F; --ok-soft: #E4F4EB; --warn: #B26A00; --warn-soft: #FFF1DA;
  --bad: #C0392B; --bad-soft: #FCE8E5;
  --font: "Be Vietnam Pro", "Segoe UI", system-ui, -apple-system, sans-serif;
  --r: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1222; --surface: #121B31; --fg: #E9EDF5; --muted: #9BA6BF; --faint: #616D88;
    --line: #212C45; --line-strong: #33405F; --navy: #86A6EA; --navy-soft: #1A2746; --sel: #7FB2FF; --on-navy: #0B1222;
    --gold: #E6B850; --gold-fill: #D9AA45; --gold-soft: #2D2615;
    --ok: #3DBE84; --ok-soft: #12301F; --warn: #E6A23C; --warn-soft: #33260F; --bad: #EC6B5F; --bad-soft: #351A17;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 130px; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.55 var(--font); -webkit-font-smoothing: antialiased; padding-bottom: env(safe-area-inset-bottom, 0); }
a { color: inherit; }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--sel); outline-offset: 2px; border-radius: 6px; }
.wrap { max-width: 980px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0)); padding-right: max(16px, env(safe-area-inset-right, 0)); }
.muted { color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }

/* Thanh trên */
.top { position: sticky; top: 0; z-index: 20; background: var(--surface); border-bottom: 1px solid var(--line); padding-top: env(safe-area-inset-top, 0); }
.top-in { display: flex; align-items: center; gap: 10px 14px; padding-block: 10px; flex-wrap: wrap; }
.back { display: inline-flex; align-items: center; gap: 4px; text-decoration: none; color: var(--navy); font-weight: 600; font-size: 14px; padding: 8px 12px 8px 8px; border: 1px solid var(--line-strong); border-radius: 10px; min-height: 40px; }
.back:hover { border-color: var(--navy); }
.brand { display: grid; margin-right: auto; min-width: 0; }
.brand .t { font-weight: 700; font-size: 16px; letter-spacing: -.01em; line-height: 1.2; }
.brand .s { font-size: 12px; color: var(--muted); }
.search { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line-strong); background: var(--bg); border-radius: 10px; padding: 0 12px; min-height: 40px; flex: 1 1 260px; max-width: 420px; color: var(--muted); }
.search input { border: 0; background: transparent; outline: 0; width: 100%; padding: 8px 0; font-size: 14.5px; color: var(--fg); }
.search:focus-within { border-color: var(--sel); }
.tabs { display: flex; gap: 6px; padding-bottom: 8px; }
.tabs a { flex: 1; text-align: center; text-decoration: none; padding: 10px 8px; border-radius: 10px; font-weight: 600; font-size: 14.5px; color: var(--muted); background: var(--bg); border: 1px solid transparent; min-height: 44px; display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; }
.tabs a small { font-weight: 400; font-size: 11.5px; }
.tabs a[aria-current="page"] { background: var(--navy); color: var(--on-navy); }
.tabs a .ic { font-size: 16px; }

main.wrap { padding-block: 18px 36px; min-height: 60vh; display: flex; flex-direction: column; gap: 18px; }
.foot { padding-block: 18px 28px; font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); }
.foot p { margin: 2px 0; }

/* Thanh phụ trong kênh */
.subnav { display: flex; gap: 6px; flex-wrap: wrap; }
.subnav a { text-decoration: none; padding: 7px 13px; border-radius: 999px; font-size: 13.5px; font-weight: 500; border: 1px solid var(--line-strong); background: var(--surface); color: var(--muted); min-height: 36px; display: inline-flex; align-items: center; }
.subnav a[aria-current="page"] { border-color: var(--navy); color: var(--navy); font-weight: 700; background: var(--navy-soft); }

.banner { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 10px 14px; border-radius: 12px; background: var(--warn-soft); color: var(--warn); font-size: 13.5px; border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent); }
.banner b { font-weight: 700; }

h2.sec { font-size: 15.5px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; letter-spacing: -.005em; }
h2.sec .cnt { font-size: 12px; font-weight: 600; color: var(--muted); background: var(--bg); border-radius: 999px; padding: 1px 9px; border: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.empty { color: var(--muted); padding: 26px 20px; border: 1px dashed var(--line-strong); border-radius: 12px; text-align: center; background: var(--surface); }
.empty b { display: block; color: var(--fg); margin-bottom: 4px; }

/* Bộ lọc */
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.chipbtn { border: 1px solid var(--line-strong); background: var(--surface); border-radius: 999px; padding: 6px 13px; font-size: 13.5px; cursor: pointer; min-height: 36px; }
.chipbtn[aria-pressed="true"] { background: var(--navy); border-color: var(--navy); color: var(--on-navy); font-weight: 600; }
.sel { border: 1px solid var(--line-strong); background: var(--surface); border-radius: 10px; padding: 6px 10px; min-height: 36px; font-size: 13.5px; }

/* Thẻ ưu đãi */
.card { position: relative; display: flex; flex-direction: column; gap: 10px; text-decoration: none; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 16px 14px; overflow: hidden; transition: box-shadow .15s, transform .15s, border-color .15s; }
.card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; background: var(--navy); }
.card.s-chay::before { background: var(--ok); }
.card.s-sap::before { background: var(--sel); }
.card.s-het::before { background: var(--faint); }
.card.hethan::before { background: var(--warn); }
.card:hover { border-color: var(--navy); box-shadow: 0 6px 18px rgba(14, 27, 54, .10); transform: translateY(-1px); }
.card .row1 { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.card .ttl { font-weight: 700; font-size: 16px; line-height: 1.3; letter-spacing: -.01em; }
.card .meta { font-size: 13px; color: var(--muted); display: grid; gap: 2px; }
.card .hl { display: flex; gap: 4px 12px; align-items: center; flex-wrap: wrap; justify-content: space-between; background: var(--bg); border-radius: 10px; padding: 8px 10px; font-size: 13px; }
.card .hl b { color: var(--navy); }
.card .count { margin-left: auto; font-weight: 700; font-size: 13px; white-space: nowrap; }
.count.warn { color: var(--warn); }
.count.ok { color: var(--ok); }
.count.info { color: var(--sel); }
.card.mau .ttl::after { content: ""; }

.badge { display: inline-flex; align-items: center; font-size: 11.5px; font-weight: 700; padding: 2px 9px; border-radius: 999px; line-height: 1.6; white-space: nowrap; letter-spacing: .02em; }
.b-hot { background: #E8412C; color: #fff; }
.b-new { background: var(--gold-fill); color: #2b1f00; }
.b-chay { background: var(--ok-soft); color: var(--ok); }
.b-sap { background: var(--navy-soft); color: var(--sel); }
.b-het { background: var(--bg); color: var(--muted); border: 1px solid var(--line); }
.b-hethan { background: var(--warn-soft); color: var(--warn); }
.b-mau { background: repeating-linear-gradient(135deg, var(--warn-soft), var(--warn-soft) 6px, transparent 6px, transparent 12px); color: var(--warn); border: 1px dashed var(--warn); }
.b-off { background: var(--navy-soft); color: var(--navy); }
.b-onl { background: #EEE7FB; color: #5B3FA8; }
@media (prefers-color-scheme: dark) { .b-onl { background: #2A2147; color: #BBA7F0; } }

/* Chi tiết */
.crumb { display: flex; gap: 8px; align-items: center; font-size: 13.5px; }
.crumb a { color: var(--sel); text-decoration: none; font-weight: 600; }
.hero { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; display: grid; gap: 12px; }
.hero h1 { font-size: clamp(20px, 3.6vw, 26px); line-height: 1.25; margin: 0; letter-spacing: -.015em; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.fact { background: var(--bg); border-radius: 10px; padding: 10px 12px; min-width: 0; }
.fact .l { font-size: 12px; color: var(--muted); }
.fact .v { font-weight: 600; font-size: 14.5px; overflow-wrap: anywhere; }
.toc { position: sticky; top: 118px; z-index: 5; display: flex; gap: 6px; overflow-x: auto; padding: 6px 0; background: var(--bg); scrollbar-width: none; }
.toc::-webkit-scrollbar { display: none; }
.toc a { white-space: nowrap; text-decoration: none; font-size: 13px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--muted); min-height: 34px; display: inline-flex; align-items: center; }
.toc a:hover { border-color: var(--navy); color: var(--navy); }

details.blk { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
details.blk > summary { list-style: none; cursor: pointer; padding: 14px 16px; display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15.5px; min-height: 52px; }
details.blk > summary::-webkit-details-marker { display: none; }
details.blk > summary .n { width: 24px; height: 24px; border-radius: 50%; background: var(--navy-soft); color: var(--navy); font-size: 12.5px; display: grid; place-items: center; flex: none; }
details.blk > summary .chev { margin-left: auto; width: 8px; height: 8px; border-right: 2px solid var(--faint); border-bottom: 2px solid var(--faint); transform: rotate(-45deg); transition: transform .15s; flex: none; }
details.blk[open] > summary .chev { transform: rotate(45deg); }
details.blk > .bd { padding: 2px 16px 16px; display: grid; gap: 12px; }
details.blk.warnb { border-color: var(--warn); background: var(--warn-soft); }
details.blk.warnb > summary .n { background: var(--warn); color: #fff; }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; font-size: 14.5px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; overflow-wrap: anywhere; }
@media (max-width: 520px) { .kv { grid-template-columns: 1fr; gap: 0; } .kv dd { margin-bottom: 8px; } }

.src { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 600; color: var(--sel); text-decoration: none; border: 1px solid var(--line-strong); border-radius: 999px; padding: 1px 9px; background: var(--surface); white-space: nowrap; min-height: 24px; }
.src:hover { border-color: var(--sel); }
.srcrow { display: flex; justify-content: flex-end; }

.lists { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.lists li { display: flex; gap: 10px; align-items: flex-start; }
.lists li .dot { flex: none; width: 24px; height: 24px; border-radius: 50%; font-size: 12.5px; font-weight: 700; display: grid; place-items: center; background: var(--navy-soft); color: var(--navy); }
.lists.ok li .dot { background: var(--ok-soft); color: var(--ok); }
.lists.bad li .dot { background: var(--bad-soft); color: var(--bad); }
.lists.warn li .dot { background: var(--warn); color: #fff; }
.excl { background: var(--bad-soft); border: 2px solid var(--bad); border-radius: 12px; padding: 12px 14px; }
.excl h4 { margin: 0 0 6px; color: var(--bad); font-size: 14px; display: flex; gap: 6px; align-items: center; }
.incl { background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 40%, transparent); border-radius: 12px; padding: 12px 14px; }
.incl h4 { margin: 0 0 6px; color: var(--ok); font-size: 14px; }

table.tb { border-collapse: collapse; width: 100%; font-size: 14.5px; }
table.tb th { text-align: left; background: var(--navy); color: var(--on-navy); padding: 9px 12px; font-size: 13px; font-weight: 600; }
table.tb th:first-child { border-radius: 10px 0 0 0; } table.tb th:last-child { border-radius: 0 10px 0 0; }
table.tb td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.tb td:last-child { font-weight: 700; color: var(--gold); }
table.tb tr:nth-child(even) td { background: var(--bg); }
.scroll-x { overflow-x: auto; }
.ladder { display: grid; gap: 8px; }
.step { display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: center; background: var(--bg); border-radius: 12px; padding: 10px 12px; }
.step .no { width: 34px; height: 34px; border-radius: 50%; background: var(--navy); color: var(--on-navy); display: grid; place-items: center; font-weight: 700; }
.step .c { font-size: 13.5px; color: var(--muted); }
.step .u { font-weight: 700; font-size: 16px; color: var(--gold); }

.cd-yes { color: var(--ok); } .cd-no { color: var(--bad); }
.pill { display: inline-flex; gap: 6px; align-items: center; padding: 4px 11px; border-radius: 999px; font-size: 13.5px; font-weight: 600; }
.pill.no { background: var(--bad-soft); color: var(--bad); }
.pill.yes { background: var(--ok-soft); color: var(--ok); }
.pill.unk { background: var(--warn-soft); color: var(--warn); }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }

.alert { border-radius: 12px; border: 2px solid var(--warn); background: var(--warn-soft); padding: 12px 14px; }
.confirm { display: inline-flex; font-size: 11.5px; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: var(--warn); color: #fff; }

/* Ví dụ dạng hóa đơn */
.ex { border-radius: 12px; overflow: hidden; border: 2px solid var(--ok); background: var(--surface); }
.ex.sai { border-color: var(--bad); }
.ex .hd { padding: 9px 14px; font-weight: 700; font-size: 13.5px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; background: var(--ok); color: #fff; }
.ex.sai .hd { background: var(--bad); }
.ex .tt { padding: 10px 14px 0; font-weight: 700; }
.ex .ln { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 8px 14px; border-bottom: 1px dashed var(--line-strong); font-size: 14px; }
.ex .ln .a { overflow-wrap: anywhere; }
.ex .ln .b { font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }
.ex .ln .g { grid-column: 1 / 3; font-size: 12.5px; color: var(--muted); }
.ex .ln .e { grid-column: 1 / 3; font-size: 12px; color: var(--faint); font-family: ui-monospace, Consolas, monospace; }
.ex .kq { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 10px 14px; background: var(--bg); font-weight: 700; }
.ex.sai .kq .b { color: var(--bad); } .ex .kq .b { color: var(--ok); text-align: right; font-variant-numeric: tabular-nums; }
.ex .kq .g { grid-column: 1 / 3; font-weight: 400; font-size: 13px; color: var(--muted); }
.ex .why { padding: 10px 14px 12px; font-size: 13.5px; display: flex; gap: 8px; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; }

.faq { display: grid; gap: 8px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.faq summary { cursor: pointer; padding: 12px 14px; font-weight: 600; list-style: none; min-height: 46px; display: flex; align-items: center; gap: 8px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "?"; flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--navy); color: var(--on-navy); font-size: 12px; display: grid; place-items: center; }
.faq .a { padding: 0 14px 12px 44px; display: grid; gap: 6px; }

/* Nội dung gốc */
.docs { display: flex; gap: 6px; flex-wrap: wrap; }
.paper { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 6px 0; }
.pg { padding: 4px 18px; }
.pg h5 { margin: 12px 0 4px; font-size: 12px; color: var(--faint); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.para { padding: 10px 12px; margin: 4px -12px; border-radius: 10px; scroll-margin-top: 140px; }
.para.hit { background: var(--gold-soft); outline: 2px solid var(--gold-fill); }
mark { background: #FFE27A; color: #2b1f00; border-radius: 3px; padding: 0 1px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.toolbar .search { max-width: 360px; background: var(--surface); }
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line-strong); background: var(--surface); border-radius: 10px; padding: 8px 14px; cursor: pointer; font-weight: 600; font-size: 13.5px; min-height: 40px; text-decoration: none; }
.btn:hover { border-color: var(--navy); }
.btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }

/* Lịch sử */
.tl { display: grid; gap: 12px; }
.tl .it { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; display: grid; gap: 8px; }
.tl .it .top2 { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.tl .it .dt { margin-left: auto; font-size: 12.5px; color: var(--muted); }
.diff { display: grid; grid-template-columns: 1fr; gap: 4px; font-size: 14px; }
.diff .tr { background: var(--bg); border-radius: 10px; padding: 8px 10px; }
.diff .old { color: var(--bad); text-decoration: line-through; }
.diff .new { color: var(--ok); font-weight: 700; }
.b-moi { background: var(--ok-soft); color: var(--ok); }
.b-doi { background: var(--warn-soft); color: var(--warn); }
.b-hhl { background: var(--bad-soft); color: var(--bad); }

/* Tìm kiếm */
.res { display: grid; gap: 10px; }
.res a.card { padding-left: 18px; }

@media (max-width: 560px) {
  .brand .s { display: none; }
  .back span { display: none; }
  .back { padding: 8px; }
  .search { order: 5; flex: 1 1 100%; max-width: none; }
  html { scroll-padding-top: 160px; }
  .toc { top: 158px; }
  .tabs a small { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print { .top, .toc, .subnav, .foot .muted { display: none; } details.blk { break-inside: avoid; } }

/* ===== Khu quản trị + bộ xem văn bản gốc ===== */
.subnav .qt-link { margin-left: auto; font-size: 12.5px; }
.adm-login { max-width: 520px; display: grid; gap: 10px; }
.adm-stack { display: grid; gap: 12px; min-width: 0; }
.adm-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.adm-drop { border: 2px dashed var(--line-strong); border-radius: 16px; padding: 28px 16px; text-align: center; background: var(--surface); cursor: pointer; display: grid; gap: 4px; }
.adm-drop.on, .adm-drop:hover { border-color: var(--navy); background: var(--navy-soft); }
.adm-card { display: flex; gap: 10px 14px; justify-content: space-between; align-items: center; flex-wrap: wrap; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; }
.adm-ct { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 14px; display: grid; gap: 12px; }
.adm-ct-h { display: flex; justify-content: space-between; gap: 8px; align-items: center; flex-wrap: wrap; }
.adm-sec, .adm-sub { border: 1px solid var(--line); border-radius: 12px; padding: 4px 12px 12px; background: var(--bg); }
.adm-sec > summary, .adm-sub > summary { cursor: pointer; font-weight: 600; padding: 10px 0; min-height: 44px; display: flex; align-items: center; }
.adm-sec > div, .adm-sub > :not(summary) { margin-top: 10px; }
.adm-sub { background: var(--surface); }
.adm-f { display: grid; gap: 4px; font-size: 13px; }
.adm-f > span { font-weight: 600; color: var(--muted); }
.adm-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; } .adm-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 560px) { .adm-2, .adm-3 { grid-template-columns: 1fr; } }
textarea.inp { min-height: 44px; resize: vertical; }
.inp { border: 1px solid var(--line-strong); background: var(--surface); border-radius: 10px; padding: 9px 11px; width: 100%; min-width: 0; font: inherit; color: var(--fg); }
select.inp { width: auto; max-width: 100%; }
.adm-bar { position: sticky; bottom: 0; background: var(--bg); padding: 10px 0; border-top: 1px solid var(--line); z-index: 5; }
.btn.danger { color: var(--bad); }
.btn.primary { background: var(--navy); border-color: var(--navy); color: var(--on-navy); }
.btn[disabled] { opacity: .6; cursor: wait; }
th.r, td.r { text-align: right; }
.vw { display: grid; gap: 10px; }
.vw-pages { display: grid; gap: 14px; justify-items: center; }
.vw-page { position: relative; background: #fff; box-shadow: 0 6px 24px -12px rgba(16, 24, 40, .35); border: 1px solid var(--line); max-width: 100%; overflow: hidden; }
.vw-page canvas { display: block; max-width: 100%; height: auto !important; }
.vw-no { position: absolute; top: 6px; left: 8px; font-size: 11px; color: #667; background: rgba(255, 255, 255, .85); padding: 1px 6px; border-radius: 6px; z-index: 2; }
.vw-text { position: absolute; inset: 0; overflow: hidden; line-height: 1; }
.vw-text span { position: absolute; color: transparent; white-space: pre; transform-origin: 0 0; cursor: text; }
.vw-text span.hl { background: rgba(255, 226, 122, .75); }
.vw-text span.cite { background: rgba(245, 158, 11, .55); outline: 2px solid #F59E0B; border-radius: 3px; }
.vw-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.alert ul { margin: 6px 0; padding-left: 20px; }
[hidden] { display: none !important; }
/* ===== Chia sẻ + tờ A4 ===== */
.share { display: grid; gap: 14px; }
.sh-h { margin: 0; font-size: 22px; letter-spacing: -.01em; }
.qr-box { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.qr-cv { width: min(280px, 100%); height: auto; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.qr-side { display: grid; gap: 8px; min-width: 220px; flex: 1; }
.qr-url { font-weight: 600; word-break: break-all; font-size: 15px; }
.steps { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.tip { background: var(--bg); border-radius: 14px; padding: 14px; display: grid; gap: 6px; }
.tip ol { margin: 0; padding-left: 20px; display: grid; gap: 4px; }
.a4 { background: #fff; color: #14306A; border: 1px solid var(--line); border-radius: 12px; padding: 40px 28px; text-align: center; display: grid; gap: 14px; justify-items: center; }
.a4-top { letter-spacing: .3em; font-weight: 700; font-size: 14px; color: #B8861A; }
.a4 h1 { margin: 0; font-size: clamp(30px, 6vw, 54px); line-height: 1.15; }
.a4-qr { width: min(520px, 90%); height: auto; }
.a4-sub { font-size: clamp(18px, 3vw, 26px); font-weight: 600; }
.a4-url { font-size: clamp(14px, 2.4vw, 20px); color: #444; word-break: break-all; }
.a4-note { font-size: 14px; color: #555; max-width: 560px; }
@media print {
  @page { size: A4; margin: 12mm; }
  body { background: #fff !important; }
  .top, .foot, .no-print, .tabs { display: none !important; }
  .a4 { border: 0; height: 250mm; overflow: hidden; align-content: center; gap: 8mm; padding: 0; break-inside: avoid; }
  .a4 h1 { font-size: 40pt; } .a4-qr { width: 120mm !important; } .a4-sub { font-size: 22pt; } .a4-url { font-size: 16pt; } .a4-note { font-size: 12pt; }
}
.credit b { color: var(--navy); }
.foot .credit { font-size: 13px; color: var(--muted); }
.a4-credit { font-size: 13px; color: #667; letter-spacing: .02em; }
@media print { .a4-credit { font-size: 11pt; } }

/* ===== Kiểm tra nhanh + Đối chiếu ===== */
.kt-form { display: grid; gap: 12px; max-width: 640px; }
.kt-out { display: grid; gap: 12px; }
.kt-card { background: var(--surface); border: 1px solid var(--line); border-left: 6px solid var(--faint); border-radius: 16px; padding: 14px 16px; display: grid; gap: 10px; }
.kt-card.ok { border-left-color: var(--ok); } .kt-card.no { border-left-color: var(--bad); } .kt-card.warn { border-left-color: var(--warn); }
.kt-h { display: flex; gap: 8px 12px; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.kt-t { font-weight: 700; text-decoration: none; color: var(--fg); }
.kt-sum { background: var(--navy-soft); border-radius: 16px; padding: 14px 16px; display: grid; gap: 6px; }
.kt-warn { margin: 0; padding-left: 20px; font-size: 13px; color: var(--warn); display: grid; gap: 4px; }
.dc-legend { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.dc-lg { font-size: 12.5px; font-weight: 600; border-radius: 999px; padding: 3px 11px; }
.dc-tb { border-collapse: separate; border-spacing: 4px; font-size: 13px; }
.dc-tb th { font-weight: 700; padding: 6px 8px; white-space: nowrap; color: var(--muted); text-align: center; }
.dc-tb tbody th { text-align: right; }
.dc-tb td { width: 64px; height: 48px; text-align: center; border-radius: 10px; font-weight: 800; font-size: 17px; cursor: pointer; }
.dc-co { background: var(--ok-soft); color: var(--ok); }
.dc-khong { background: var(--bad); color: #fff; }
.dc-chung { background: var(--bad-soft); color: var(--bad); border: 1.5px dashed var(--bad); }
.dc-chua { background: var(--bg); color: var(--muted); border: 1px solid var(--line-strong); }
.dc-self { background: transparent; color: var(--faint); cursor: default !important; }
.dc-ex { margin-top: 12px; border-radius: 12px; padding: 12px 14px; display: grid; gap: 8px; background: var(--bg); }
.dc-ex.dc-co, .dc-ex.dc-khong, .dc-ex.dc-chung, .dc-ex.dc-chua { font-size: 14px; font-weight: 400; color: var(--fg); }
.dc-ex.dc-khong { background: var(--bad-soft); } .dc-ex.dc-khong b { color: var(--bad); }
.cmp-pick { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
table.cmp { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 13.5px; }
table.cmp th, table.cmp td { border: 1px solid var(--line); padding: 8px 10px; vertical-align: top; text-align: left; }
table.cmp thead th { background: var(--navy); color: var(--on-navy); } table.cmp thead th a { color: inherit; }
table.cmp tbody th { background: var(--bg); width: 110px; color: var(--muted); }
.cmp-ul { margin: 0; padding-left: 16px; display: grid; gap: 3px; }
.cmp-bad { color: var(--bad); font-weight: 600; }