/* Scenegraph Studio: trang giới thiệu, tải về, tài liệu. Phông chữ tự host (OFL, xem assets/fonts/OFL-*.txt), không tài nguyên ngoài.
   Nhận diện: giao diện tối kiểu phần mềm DCC, màu cam của app chỉ dùng cho nút chính và chỉ báo đang chọn. */
@font-face {font-family: 'Archivo';
  font-style: normal;
  font-weight: 500 800;
  font-stretch: 75% 100%;
  font-display: swap;
  src: url(/assets/fonts/Archivo-vietnamese.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;}
@font-face {font-family: 'Archivo';
  font-style: normal;
  font-weight: 500 800;
  font-stretch: 75% 100%;
  font-display: swap;
  src: url(/assets/fonts/Archivo-latin.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;}
@font-face {font-family: 'Inter';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(/assets/fonts/Inter-vietnamese.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;}
@font-face {font-family: 'Inter';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(/assets/fonts/Inter-latin.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;}
@font-face {font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/assets/fonts/JetBrainsMono-vietnamese.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;}
@font-face {font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/assets/fonts/JetBrainsMono-latin.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;}

:root {
  color-scheme: dark;
  --bg: #131416; --bg-2: #1b1c1f; --surface: #24262a; --fg: #eceef1; --muted: #a2a7af; --line: #2f3237;
  --accent: #f2a33a; --accent-fg: #1a1206; --link: #f5b65e; --code-bg: #1e2023;
  --warn-bg: #2a2212; --warn-line: #7a5a1c;
  --n-geo: #8fc3e6; --n-mat: #7fd1a6; --n-tsl: #b79bf2; --n-comp: #78c9bd; --n-ev: #e07a73; --n-act: #f0a54a; --n-phys: #6fd08f; --n-grey: #cfcfcf;
  --display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 120px; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.65 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; letter-spacing: -.005em; text-wrap: balance; }
code, kbd, pre { font-family: var(--mono); font-size: .88em; }
code { background: var(--code-bg); padding: .1em .35em; border-radius: 3px; overflow-wrap: anywhere; }
kbd { background: var(--surface); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 3px; padding: .05em .4em; white-space: nowrap; }
pre { background: #0b0b0c; border: 1px solid var(--line); border-radius: 2px; padding: 16px 18px; overflow-x: auto; line-height: 1.6; margin: 1em 0; }
pre code { background: none; padding: 0; overflow-wrap: normal; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding-inline: max(16px, min(4vw, 32px)); }
.skip { position: absolute; left: 16px; top: -64px; background: var(--accent); color: var(--accent-fg); padding: 10px 14px; z-index: 30; }
.skip:focus { top: 8px; }
.lbl { font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }

/* dải tin mới */
.news { background: var(--accent); color: var(--accent-fg); font-size: 14px; }
.news .wrap { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; min-height: 36px; padding-block: 6px; }
.news a { color: inherit; font-weight: 600; }

/* đầu trang */
.site-head { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 94%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 24px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font: 700 18px/1 var(--display); font-stretch: 85%; letter-spacing: .01em; color: var(--fg); text-decoration: none; padding: 12px 0; }
.brand img { width: 24px; height: 24px; }
.site-head nav { display: flex; flex-wrap: wrap; gap: 0 2px; margin-left: -10px; }
@media (min-width: 640px) { .site-head nav { margin-left: auto; } }
.site-head nav a { color: var(--muted); text-decoration: none; padding: 10px 10px; min-height: 44px; display: inline-flex; align-items: center; font-size: 15px; border-bottom: 2px solid transparent; }
.site-head nav a:hover { color: var(--fg); }
.site-head nav a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--accent); }

/* thanh context của trang chủ */
.ctxbar { border-bottom: 1px solid var(--line); background: var(--bg); }
.ctxbar .wrap { display: flex; gap: 2px; align-items: center; overflow-x: auto; scrollbar-width: none; min-height: 48px; }
.ctxbar .wrap::-webkit-scrollbar { display: none; }
.ctxbar b { font: 700 15px/1 var(--display); font-stretch: 85%; margin-right: 14px; white-space: nowrap; }
.ctxbar a { color: var(--muted); text-decoration: none; padding: 8px 10px; font: 500 13px/1 var(--mono); white-space: nowrap; }
.ctxbar a:hover { color: var(--fg); }

/* nút */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 22px; border-radius: 2px; border: 1px solid #4a4e55; background: transparent; color: var(--fg); font: 600 15px/1 var(--font); text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--fg); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.primary:hover { filter: brightness(1.07); }
.more { font-weight: 600; font-size: 15px; text-decoration: none; color: var(--fg); display: inline-flex; gap: 8px; align-items: center; }
.more::after { content: "→"; color: var(--accent); transition: transform .15s; }
.more:hover::after { transform: translateX(3px); }

/* trang chủ: hero là render thật trong viewport */
.hero { position: relative; background: #000; overflow: hidden; }
.hero picture img { width: 100%; height: clamp(460px, 56vw, 680px); object-fit: cover; object-position: 50% 0; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 28%, rgba(0,0,0,.62) 64%, #000 100%); pointer-events: none; }
.hero .ov { position: absolute; inset: auto 0 0; z-index: 2; padding-bottom: 48px; }
.hero h1 { font-size: clamp(46px, 7.6vw, 104px); line-height: .96; font-weight: 800; font-stretch: 78%; margin: 14px 0 0; max-width: 12ch; }
.lead { font-size: clamp(17px, 1.7vw, 20px); color: #d3d6db; max-width: 56ch; margin: 18px 0 24px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.status { color: #b9bec6; font: 400 13px/1.5 var(--mono); margin: 0; }
.hero .cap { position: absolute; right: max(16px, min(4vw, 32px)); top: 16px; z-index: 2; font: 400 12px/1.4 var(--mono); color: #8f959d; text-align: right; max-width: 34ch; margin: 0; }
@media (max-width: 700px) { .hero::after { background: linear-gradient(180deg, transparent 18%, rgba(0,0,0,.72) 48%, #000 100%); } .hero picture img { height: 600px; } .hero .cap { display: none; } .hero .ov { padding-bottom: 28px; } }

section.block { padding: clamp(56px, 8vw, 88px) 0; border-top: 1px solid var(--line); }
section.block.alt { background: var(--bg-2); }
.head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px 64px; align-items: end; margin-bottom: 40px; }
.head .lbl { display: block; margin-bottom: 14px; }
.head h2, section.block > .wrap > h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.06; font-stretch: 85%; margin: 0; }
.head p, section.block > .wrap > .sub { color: var(--muted); font-size: 17px; max-width: 58ch; margin: 0; }
@media (max-width: 860px) { .head { grid-template-columns: minmax(0, 1fr); } }

.fam { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); list-style: none; margin: 0; padding: 0; }
.fam > li { padding: 28px 28px 30px 0; display: flex; flex-direction: column; gap: 12px; }
.fam > li + li { padding-left: 28px; border-left: 1px solid var(--line); }
.fam h3 { font-size: 24px; font-stretch: 85%; margin: 0; }
.fam small { display: block; font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.fam p { color: var(--muted); margin: 0; }
.fam .bot { margin-top: auto; padding-top: 10px; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
@media (max-width: 900px) { .fam { grid-template-columns: minmax(0, 1fr); } .fam > li, .fam > li + li { padding: 24px 0; border-left: 0; border-bottom: 1px solid var(--line); } }

.roles { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); list-style: none; margin: 0; padding: 0; }
.roles a { background: var(--bg-2); padding: 22px 20px 24px; text-decoration: none; color: var(--fg); display: flex; flex-direction: column; gap: 10px; height: 100%; }
.roles a:hover { background: var(--surface); }
.roles h3 { font-size: 21px; font-stretch: 85%; margin: 0; }
.roles p { color: var(--muted); font-size: 14.5px; margin: 0; }
.roles .more { margin-top: auto; padding-top: 8px; font-size: 14px; }
@media (max-width: 1100px) { .roles { grid-template-columns: repeat(2, minmax(0, 1fr)); } .roles li:last-child { grid-column: 1 / -1; } }
@media (max-width: 600px) { .roles { grid-template-columns: minmax(0, 1fr); } }

.feat { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 56px; align-items: center; padding-block: 52px; border-top: 1px solid var(--line); }
.feat.r { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.feat.r .tx { order: 2; }
.feat .kw { display: block; font: 800 clamp(44px, 5.4vw, 72px)/.9 var(--display); font-stretch: 75%; letter-spacing: .01em; text-transform: uppercase; }
.feat h3 { font-size: 22px; font-stretch: 90%; margin: 12px 0 14px; }
.feat .tx > p { color: var(--muted); margin: 0; }
.feat ul { list-style: none; padding: 0; margin: 20px 0 0; font-size: 15px; }
.feat li { padding: 10px 0; border-top: 1px solid var(--line); color: #c9ccd1; }
.pic { margin: 0; background: #0b0b0c; border: 1px solid var(--line); }
.pic figcaption { font: 400 12.5px/1.5 var(--mono); color: var(--muted); padding: 10px 12px; border-top: 1px solid var(--line); }
.pic pre { margin: 0; border: 0; font-size: 12.5px; }
@media (max-width: 960px) { .feat, .feat.r { grid-template-columns: minmax(0, 1fr); gap: 28px; } .feat.r .tx { order: 0; } }
.chip { display: inline-flex; font: 500 12px/1 var(--mono); padding: 4px 7px; border-radius: 2px; color: #17181a; background: var(--n-grey); white-space: nowrap; vertical-align: 1px; }
.chip.tsl { background: var(--n-tsl); } .chip.mat { background: var(--n-mat); } .chip.comp { background: var(--n-comp); }
.chip.ev { background: var(--n-ev); } .chip.act { background: var(--n-act); } .chip.phys { background: var(--n-phys); }
pre .k { color: #c7a1ff; } pre .s { color: #9fd49a; } pre .nu { color: #8cc4ff; } pre .f { color: #ffc173; } pre .c { color: #7d828a; }

.pipe { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px; }
.pipe h3 { font-size: 22px; font-stretch: 85%; margin: 0 0 14px; }
.pipe ul { list-style: none; padding: 0; margin: 0; }
.pipe li { padding: 10px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
@media (max-width: 900px) { .pipe { grid-template-columns: minmax(0, 1fr); gap: 32px; } }

.learn { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 56px; align-items: start; }
.learn h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.06; font-stretch: 85%; margin: 14px 0 16px; }
.learn p { color: var(--muted); font-size: 17px; margin: 0; }
.docs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); list-style: none; margin: 0; padding: 0; }
.docs a { background: var(--bg); padding: 20px; text-decoration: none; color: var(--fg); display: flex; flex-direction: column; gap: 6px; height: 100%; }
.docs a:hover { background: var(--surface); }
.docs b { font: 700 18px/1.2 var(--display); font-stretch: 90%; }
.docs span { color: var(--muted); font-size: 14px; }
@media (max-width: 900px) { .learn { grid-template-columns: minmax(0, 1fr); gap: 28px; } }
@media (max-width: 520px) { .docs { grid-template-columns: minmax(0, 1fr); } }

/* trang văn bản */
.page { padding-block: clamp(36px, 6vw, 64px) 80px; }
.page h1 { font-size: clamp(32px, 4.4vw, 52px); line-height: 1.04; font-stretch: 85%; margin: 0 0 14px; }
.prose { max-width: 72ch; }
.prose h2 { font-size: 26px; line-height: 1.2; font-stretch: 90%; margin: 2em 0 .5em; }
.prose h3 { font-size: 19px; margin: 1.6em 0 .4em; }
.prose p, .prose li { overflow-wrap: break-word; color: #d3d6db; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: .35em 0; }
.table-scroll { overflow-x: auto; margin: 1em 0; border: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); background: var(--bg-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td code { word-break: break-all; }
td:first-child code { word-break: normal; white-space: nowrap; }
.note { border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--bg-2); padding: 14px 18px; margin: 1.2em 0; }
.note.warn { background: var(--warn-bg); border-color: var(--warn-line); border-left-color: var(--accent); }
.note p { margin: .3em 0; }
.meta { color: var(--muted); font: 400 13px/1.5 var(--mono); }

/* tài liệu */
.doc { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px 56px; }
.docnav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.docnav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--line); color: var(--fg); text-decoration: none; font-size: 15px; background: var(--bg-2); }
.docnav a[aria-current="page"] { border-color: var(--accent); color: var(--fg); }
@media (min-width: 900px) {
  .doc { grid-template-columns: 220px minmax(0, 1fr); }
  .docnav { position: sticky; top: 84px; align-self: start; }
  .docnav ul { flex-direction: column; gap: 0; border-left: 1px solid var(--line); }
  .docnav a { border: 0; background: none; width: 100%; padding: 0 14px; color: var(--muted); }
  .docnav a:hover { color: var(--fg); }
  .docnav a[aria-current="page"] { box-shadow: inset 2px 0 0 var(--accent); color: var(--fg); }
}
.doc-index { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); max-width: 960px; }
.doc-index a { display: block; padding: 18px 20px; background: var(--bg); color: var(--fg); text-decoration: none; height: 100%; }
.doc-index a:hover { background: var(--surface); }
.doc-index b { display: block; font: 700 18px/1.25 var(--display); font-stretch: 90%; margin-bottom: 4px; }
.doc-index span { color: var(--muted); font-size: 14.5px; }

.release { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 32px; }
.release h2 { margin: 0 0 4px; font-size: 24px; }

/* chân trang */
.site-foot { border-top: 1px solid var(--line); background: #0e0f10; padding: 44px 0 40px; color: var(--muted); font-size: 14.5px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 8px 28px; justify-content: space-between; align-items: center; }
.site-foot ul { display: flex; flex-wrap: wrap; gap: 4px 22px; list-style: none; margin: 0; padding: 0; }
.site-foot a { color: #c9ccd1; text-decoration: none; display: inline-block; padding: 8px 0; }
.site-foot a:hover { color: var(--fg); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .more::after { transition: none; } }