/* vietnamese */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/f1.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/f2.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/f3.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* vietnamese */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/f4.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/f5.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/f6.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* vietnamese */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/f7.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/f8.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/f9.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* vietnamese */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/f10.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
/* latin-ext */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/f11.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/f12.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* BRD nền tảng kho & đơn hàng cho SME — ink/indigo, motif bong bóng chat.
   Bong bóng = góc dưới-trái bo nhỏ (đuôi tin nhắn). Chỉ dùng cho thứ "đang nói":
   số mục, ghi chú, nhãn bằng chứng. Bảng và hình giữ góc vuông vừa phải. */
:root{
  --ink:#171B36; --ink2:#3A3F5C; --muted:#5D6280; --line:#DCDEEC; --line2:#ECEDF6;
  --paper:#FFFFFF; --wash:#F5F5FB; --rail:#1B1F3B; --rail-ink:#C9CCE8; --rail-mute:#8B90B8;
  --accent:#3D41B8; --accent-ink:#2E3192; --accent-soft:#ECECFB; --accent-line:#C5C7F2;
  --plum:#7A3593; --plum-soft:#F5EAF9; --ok:#1C6B44; --ok-soft:#E4F4EA; --warn:#94500A; --warn-soft:#FCF0DE;
  --bad:#B4232A; --bad-soft:#FBE8E8;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --toc:288px; --bub:18px 18px 18px 5px;
}
@media (prefers-color-scheme:dark){:root{
  --ink:#E8E9F7; --ink2:#C3C6E0; --muted:#9A9FC2; --line:#2E3356; --line2:#252A49;
  --paper:#12152B; --wash:#181C38; --rail:#0C0E20; --rail-ink:#C9CCE8; --rail-mute:#8B90B8;
  --accent:#9EA2FF; --accent-ink:#B9BCFF; --accent-soft:#232859; --accent-line:#3C4290;
  --plum:#DDA6F0; --plum-soft:#33213F; --ok:#7FD6A6; --ok-soft:#173527; --warn:#F2B66B; --warn-soft:#3A2A14;
  --bad:#FF9A9F; --bad-soft:#3D1A1E;
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16.5px/1.72 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent-ink);text-underline-offset:3px;text-decoration-thickness:1px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
img{max-width:100%;height:auto;display:block}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--paper);padding:8px 12px;z-index:99}

/* ---------- shell: rail mực tối ---------- */
.toc{position:fixed;inset:0 auto 0 0;width:var(--toc);padding:30px 22px 28px 26px;overflow:auto;background:var(--rail);color:var(--rail-ink);z-index:20;scrollbar-width:thin}
.toc-brand{font:700 15.5px/1.35 var(--sans);margin:0 0 6px;color:#fff;letter-spacing:-.01em}
.toc-sub{font-size:12.5px;color:var(--rail-mute);margin:0 0 24px;line-height:1.55}
.toc ol{list-style:none;margin:0;padding:0 0 0 14px;position:relative}
.toc ol::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:2px;background:#2D3260}
.toc-fill{position:absolute;left:0;top:4px;width:2px;height:0;background:#8F94FF;transition:height .15s}
.toc li{margin:0}
.toc li a{display:block;position:relative;padding:5px 6px 5px 12px;font-size:13.5px;line-height:1.42;color:var(--rail-ink);text-decoration:none;border-radius:var(--bub)}
.toc li a:hover{color:#fff;background:#252A52}
.toc li a b{display:inline-block;min-width:22px;font-weight:600;color:var(--rail-mute);font-variant-numeric:tabular-nums}
.toc li a[aria-current=true]{color:#fff;font-weight:600;background:#2A2F63}
.toc li a[aria-current=true] b{color:#B9BCFF}
.toc :focus-visible{outline-color:#B9BCFF}
.menu-btn{display:none}
main{margin-left:var(--toc);padding:0 56px 96px;max-width:calc(var(--toc) + 1160px)}
.col{max-width:720px}
section.sec{padding-top:80px;margin-top:64px;border-top:1px solid var(--line);position:relative}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--sans);color:var(--ink);margin:0}
h1{font:700 clamp(34px,4.6vw,56px)/1.08 var(--sans);letter-spacing:-.025em;max-width:16ch}
h2{font:700 clamp(27px,3.1vw,38px)/1.18 var(--sans);letter-spacing:-.02em;margin:0 0 20px;display:flex;gap:16px;align-items:flex-start}
/* số mục = bong bóng chat có đuôi */
h2 .n{flex:none;font:700 16px/1 var(--sans);color:#fff;background:var(--accent);border-radius:var(--bub);padding:9px 12px 10px;min-width:40px;text-align:center;letter-spacing:0;margin-top:2px;font-variant-numeric:tabular-nums}
@media (prefers-color-scheme:dark){h2 .n{color:#12152B}}
h3{font:700 22px/1.3 var(--sans);letter-spacing:-.012em;margin:48px 0 12px}
h4{font:600 16.5px/1.45 var(--sans);margin:26px 0 6px}
p{margin:0 0 16px}
.lede{font:400 20px/1.62 var(--sans);color:var(--ink2);max-width:720px;letter-spacing:-.005em}
.small,.note-s{font-size:14px;color:var(--muted)}
ul,ol{padding-left:22px;margin:0 0 16px}li{margin:5px 0}
strong,b{font-weight:600}
code,.code{font:500 .9em/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--wash);border:1px solid var(--line2);padding:1px 5px;border-radius:5px;white-space:nowrap}
hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ---------- nhãn bằng chứng (bong bóng nhỏ) ---------- */
.lb{display:inline-block;font:600 12px/1 var(--sans);padding:4px 8px 5px;border-radius:9px 9px 9px 3px;white-space:nowrap;vertical-align:2px;margin:0 2px}
.lb.dx{background:var(--accent-soft);color:var(--accent-ink);box-shadow:inset 0 0 0 1px var(--accent-line)}
.lb.sl{background:var(--plum-soft);color:var(--plum)}
.lb.f{background:var(--ok-soft);color:var(--ok)}
.lb.n{background:var(--wash);color:var(--muted);box-shadow:inset 0 0 0 1px var(--line)}
sup.s{font-size:11px;line-height:0;margin-left:1px}
sup.s a{text-decoration:none;font-weight:600;padding:0 1px}
sup.s a:hover{text-decoration:underline}

/* ---------- ghi chú dạng tin nhắn ---------- */
.note{position:relative;margin:24px 0;padding:16px 20px 14px;background:var(--wash);border-radius:var(--bub);max-width:760px;border:1px solid var(--line2)}
.note > .t{display:block;font-weight:700;margin:0 0 6px;color:var(--ink)}
.note p:last-child,.note ul:last-child,.note ol:last-child{margin-bottom:0}
.note.dx{background:var(--accent-soft);border-color:var(--accent-line)}
.note.sl{background:var(--plum-soft);border-color:transparent}
.note.warn{background:var(--warn-soft);border-color:transparent}
.note.warn > .t{color:var(--warn)}
.note.bad{background:var(--bad-soft);border-color:transparent}
.note.bad > .t{color:var(--bad)}
.note.ok{background:var(--ok-soft);border-color:transparent}
.pull{margin:36px 0;padding:4px 0 4px 22px;border-left:3px solid var(--accent);font:600 22px/1.45 var(--sans);letter-spacing:-.012em;color:var(--ink);max-width:760px}

/* ---------- bảng ---------- */
.tw{overflow-x:auto;margin:18px 0 26px;border:1px solid var(--line);border-radius:12px;background:var(--paper);-webkit-overflow-scrolling:touch}
.tw:focus-visible{outline-offset:3px}
table{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.55}
th,td{text-align:left;vertical-align:top;padding:10px 14px;border-bottom:1px solid var(--line2)}
thead th{background:var(--wash);font-weight:600;color:var(--ink);border-bottom:1px solid var(--line);white-space:nowrap;position:sticky;top:0}
tbody th{font-weight:600;color:var(--ink)}
tbody tr:last-child > *{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.wide{min-width:880px}
table.xwide{min-width:1080px}
tr.grp > th,tr.grp > td{background:var(--accent-soft);color:var(--accent-ink);font-weight:700;font-size:13.5px;padding-top:8px;padding-bottom:8px}
td.c,th.c{text-align:center}
/* ma trận: cột đầu dính khi cuộn ngang */
table.mx th:first-child,table.mx td:first-child{position:sticky;left:0;background:var(--paper);z-index:1;box-shadow:1px 0 0 var(--line2)}
table.mx thead th:first-child{background:var(--wash);z-index:2}
table.mx tr.grp > th:first-child{background:var(--accent-soft)}
table.mx td.mo{text-align:center;white-space:nowrap;width:84px}
/* ô MoSCoW */
.mo{font-weight:600;font-size:13px}
td.mo.m{background:var(--accent);color:#fff}
td.mo.s{background:var(--accent-soft);color:var(--accent-ink)}
td.mo.c{color:var(--ink2);box-shadow:inset 0 0 0 1px var(--line)}
td.mo.o{color:var(--muted);font-weight:400}
@media (prefers-color-scheme:dark){td.mo.m{color:#12152B}}
.chip{display:inline-block;font:600 12.5px/1 var(--sans);padding:5px 9px 6px;border-radius:9px 9px 9px 3px;white-space:nowrap}
.chip.m{background:var(--accent);color:#fff}.chip.s{background:var(--accent-soft);color:var(--accent-ink)}
.chip.c{box-shadow:inset 0 0 0 1px var(--line);color:var(--ink2)}.chip.o{color:var(--muted);box-shadow:inset 0 0 0 1px var(--line2)}
@media (prefers-color-scheme:dark){.chip.m{color:#12152B}}

/* ---------- khối ---------- */
.grid2,.grid3{display:grid;gap:16px;margin:20px 0 28px}
.grid2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.box{border:1px solid var(--line);border-radius:14px;padding:18px 20px 14px;background:var(--paper)}
.box h4{margin-top:0}
.box > :last-child{margin-bottom:0}
.box.hl{border-color:var(--accent-line);background:var(--accent-soft)}
.kv{display:grid;grid-template-columns:minmax(120px,190px) 1fr;gap:6px 18px;margin:12px 0 20px;font-size:15px}
.kv dt{font-weight:600;color:var(--ink)}
.kv dd{margin:0;color:var(--ink2)}

/* các bước tuần tự */
ol.steps{list-style:none;padding:0;margin:20px 0 28px;counter-reset:st;max-width:820px}
ol.steps > li{counter-increment:st;position:relative;padding:2px 0 18px 54px;margin:0}
ol.steps > li::before{content:counter(st);position:absolute;left:0;top:0;width:36px;height:32px;display:grid;place-items:center;font:700 14px/1 var(--sans);color:var(--accent-ink);background:var(--accent-soft);border-radius:var(--bub)}
ol.steps > li::after{content:"";position:absolute;left:17px;top:38px;bottom:4px;width:2px;background:var(--line2)}
ol.steps > li:last-child::after{display:none}
ol.steps > li > b:first-child{display:block}

/* kịch bản chat cho quy trình: ai nói gì, ở nhóm nào */
.seq{margin:18px 0 28px;border-left:3px solid var(--accent-line);padding:4px 0 4px 18px;max-width:860px}
.seq .grp-name{font:600 13px/1.4 var(--sans);color:var(--accent-ink);margin:0 0 10px}
.seq .ln{display:grid;grid-template-columns:150px 1fr;gap:4px 14px;padding:7px 0;border-bottom:1px dashed var(--line2);font-size:15px}
.seq .ln:last-child{border-bottom:0}
.seq .who{font-weight:600;color:var(--ink);font-size:14px}
.seq .ln.bot .who{color:var(--accent-ink)}
.seq .ln.scr .who{color:var(--warn)}
.seq .ln.log .who{color:var(--ok)}
.seq .ln.sys .who{color:var(--muted)}
.seq .say{color:var(--ink2)}

/* máy trạng thái */
ol.sm{list-style:none;display:flex;flex-wrap:wrap;gap:8px 4px;padding:0;margin:16px 0 22px;align-items:center}
ol.sm li{margin:0;display:flex;align-items:center;gap:4px}
ol.sm li span{display:inline-block;font:600 13.5px/1 var(--sans);padding:8px 12px 9px;border-radius:var(--bub);background:var(--accent-soft);color:var(--accent-ink)}
ol.sm li + li::before{content:"";width:16px;height:2px;background:var(--accent-line);display:inline-block}
ol.sm li.end span{background:var(--accent);color:#fff}
@media (prefers-color-scheme:dark){ol.sm li.end span{color:#12152B}}

/* sơ đồ phụ thuộc module */
.dep{display:grid;gap:10px;margin:18px 0 26px}
.dep .row{display:grid;grid-template-columns:180px 1fr;gap:12px;align-items:start;font-size:14.5px}
.dep .row > b{font-weight:600}

/* ---------- bìa ---------- */
.cover{padding:72px 0 8px;max-width:980px}
.cover .kicker{font:600 14px/1.4 var(--sans);color:var(--accent-ink);margin:0 0 18px;display:inline-block;padding:7px 12px 8px;background:var(--accent-soft);border-radius:var(--bub)}
.cover h1{margin:0 0 22px}
.cover .lede{margin-bottom:28px}
.thread{display:flex;flex-direction:column;gap:8px;max-width:640px;margin:8px 0 28px}
.thread .b{align-self:flex-start;max-width:88%;padding:10px 15px 11px;border-radius:var(--bub);background:var(--wash);border:1px solid var(--line2);font-size:15px;line-height:1.5}
.thread .b.me{align-self:flex-end;border-radius:18px 18px 5px 18px;background:var(--accent);color:#fff;border-color:transparent}
@media (prefers-color-scheme:dark){.thread .b.me{color:#12152B}}
.thread .b small{display:block;font-size:12px;color:var(--muted);margin-bottom:2px;font-weight:600}
.thread .b.me small{color:inherit;opacity:.8}
.meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2px 28px;padding:18px 0 0;border-top:1px solid var(--line);font-size:14px;max-width:980px}
.meta div{padding:6px 0}
.meta dt{color:var(--muted);font-size:12.5px}
.meta dd{margin:0;font-weight:500}

/* ---------- hình ---------- */
figure{margin:24px 0 30px;max-width:840px}
.shot{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--wash)}
figcaption{font-size:13.5px;color:var(--muted);margin-top:10px;line-height:1.55}
figcaption b{color:var(--ink2)}

/* ---------- nguồn ---------- */
ol.src{font-size:13.5px;line-height:1.5;padding-left:0;list-style:none}
ol.src li{display:grid;grid-template-columns:44px 1fr;gap:8px;padding:6px 0;border-bottom:1px solid var(--line2);margin:0;word-break:break-word}
ol.src li > span:first-child{font-weight:700;color:var(--accent-ink);font-variant-numeric:tabular-nums}
ol.src li:target{background:var(--accent-soft)}
.endnote{margin-top:72px;padding-top:20px;border-top:1px solid var(--line);font-size:13px}
.endnote a{color:var(--muted);text-decoration:none}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  :root{--toc:0px}
  .toc{transform:translateX(-100%);width:min(320px,86vw);transition:transform .2s;box-shadow:0 0 0 100vmax rgba(10,12,30,0)}
  .toc.open{transform:none;box-shadow:0 0 0 100vmax rgba(10,12,30,.45)}
  .menu-btn{display:block;position:fixed;top:12px;left:12px;z-index:30;font:600 14px/1 var(--sans);padding:11px 14px 12px;border:0;border-radius:var(--bub);background:var(--rail);color:#fff;cursor:pointer;min-height:44px}
  main{margin-left:0;padding:0 28px 80px}
  .cover{padding-top:76px}
}
@media (max-width:640px){
  body{font-size:16px}
  main{padding:0 18px 72px}
  section.sec{padding-top:56px;margin-top:40px}
  h2{gap:12px}
  h2 .n{font-size:14px;padding:8px 10px 9px;min-width:34px}
  .lede{font-size:18px}
  .seq .ln{grid-template-columns:1fr;gap:0}
  .kv{grid-template-columns:1fr;gap:2px}
  .kv dd{margin-bottom:8px}
  .dep .row{grid-template-columns:1fr;gap:2px}
  th,td{padding:9px 11px}
}

/* ---------- in ---------- */
@media print{
  :root{--ink:#000;--ink2:#222;--muted:#444;--paper:#fff;--wash:#f3f3f7;--line:#bbb;--line2:#ddd;--accent:#2E3192;--accent-ink:#2E3192;--accent-soft:#ececfb}
  .toc,.menu-btn,.skip{display:none!important}
  main{margin:0;padding:0;max-width:none}
  body{font-size:11pt;line-height:1.5}
  section.sec{break-before:page;padding-top:0;margin-top:0;border:0}
  .tw{overflow:visible;border:0}
  table.wide,table.xwide{min-width:0}
  table{font-size:9pt}
  thead th{position:static}
  table.mx th:first-child,table.mx td:first-child{position:static}
  tr,figure,.note,.box,.mk{break-inside:avoid}
  a{color:inherit;text-decoration:none}
  td.mo.m{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}