/* AgentX — CSS dùng chung cho các trang sinh từ data-site (home, docs, downloads). */
:root{
  --bg:#1f1f1f; --bg-2:#1a1a1a; --surface:#252526; --surface-2:#2d2d2e; --line:#2f2f30; --line-2:#3a3a3c;
  --ink:#d4d4d4; --ink-2:#9d9d9d; --ink-3:#7a7a7a;
  --accent:#a08ace;          /* chữ/viền nhấn trên nền tối */
  --accent-bg:#7a5cb8;       /* nền nút: chữ trắng ≈ 5.2:1 */
  --accent-bg-hover:#8b6fc0;
  --accent-soft:rgba(139,111,192,.14);
  --accent-ink:#fff;
  --note:#6ea8fe;   --note-bg:rgba(110,168,254,.08);
  --warn:#e5b84f;   --warn-bg:rgba(229,184,79,.08);
  --danger:#f07178; --danger-bg:rgba(240,113,120,.09);
  --ok:#7fd18b;
  --r-sm:8px; --r:12px; --r-lg:16px;
  --wrap:1120px; --narrow:820px;
  --header-h:64px;
  --font:"IBM Plex Sans",-apple-system,"Segoe UI",sans-serif;
  --font-head:Archivo,"IBM Plex Sans",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 16px)}
body{
  margin:0; min-height:100vh; display:flex; flex-direction:column;
  background:radial-gradient(1100px 560px at 50% -8%, #2a2d2e 0%, var(--bg) 58%) no-repeat, var(--bg);
  color:var(--ink); font:400 16px/1.6 var(--font); -webkit-font-smoothing:antialiased;
}
main{flex:1}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto; display:block}
code{font:500 .86em var(--font-mono); background:var(--surface-2); border:1px solid var(--line); border-radius:6px; padding:.1em .4em}
h1,h2,h3,h4{font-family:var(--font-head); color:var(--ink); line-height:1.2; letter-spacing:-.01em; text-wrap:balance}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:4px}
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 24px; width:100%}
.wrap.narrow{max-width:var(--narrow)}
.muted{color:var(--ink-2)} .small{font-size:.875rem}
.ic{width:20px; height:20px; flex:none}
.skip{position:absolute; left:-999px; top:8px; background:var(--accent-bg); color:#fff; padding:8px 12px; border-radius:var(--r-sm); z-index:100}
.skip:focus{left:8px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 24px; border-radius:var(--r); border:1px solid transparent;
  font:600 1rem/1 var(--font); cursor:pointer; transition:background .15s, border-color .15s, color .15s;
  text-decoration:none!important; white-space:nowrap;
}
.btn .ic{width:18px; height:18px}
.btn-sm{padding:9px 14px; font-size:.9rem; border-radius:var(--r-sm)}
.btn.primary{background:var(--accent-bg); color:var(--accent-ink)}
.btn.primary:hover{background:var(--accent-bg-hover)}
.btn.ghost{background:transparent; color:var(--ink); border-color:var(--line-2)}
.btn.ghost:hover{background:var(--surface); border-color:var(--ink-3)}
.cta{display:flex; gap:12px; flex-wrap:wrap; justify-content:center}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:50; height:var(--header-h);
  background:rgba(31,31,31,.82); backdrop-filter:saturate(1.4) blur(12px); border-bottom:1px solid var(--line);
}
.header-inner{height:100%; display:flex; align-items:center; gap:24px}
.logo{display:inline-flex; color:var(--ink)}
.logo svg{height:24px; width:auto; display:block}
.main-nav{display:flex; gap:2px; flex:1}
.nav-link{color:var(--ink-2); font-size:.92rem; font-weight:500; padding:8px 12px; border-radius:var(--r-sm)}
.nav-link:hover{color:var(--ink); background:var(--surface); text-decoration:none}
.nav-link.is-active{color:var(--ink)}
.header-actions{display:flex; gap:8px; align-items:center}
.lang-select{
  background:var(--surface); color:var(--ink-2); border:1px solid var(--line); border-radius:var(--r-sm);
  padding:8px 8px; font:500 .85rem var(--font); cursor:pointer;
}
.nav-toggle{display:none; background:none; border:0; color:var(--ink); padding:8px; cursor:pointer; border-radius:var(--r-sm)}
@media (max-width:900px){
  .header-inner{gap:12px}
  .main-nav{
    display:none; position:absolute; top:var(--header-h); left:0; right:0; flex-direction:column;
    background:var(--bg-2); border-bottom:1px solid var(--line); padding:8px 16px 16px;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px; font-size:1rem}
  .header-actions{margin-left:auto}
  .header-actions .btn.ghost{display:none}
  .nav-toggle{display:inline-flex}
}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-head{text-align:center; max-width:640px; margin:0 auto 48px}
.section-head.left{text-align:left; margin-left:0}
.section-head h2,.section-head h1{font-size:clamp(1.75rem,4vw,2.5rem); font-weight:800; margin:0 0 12px}
.lede{color:var(--ink-2); font-size:clamp(1rem,2.2vw,1.15rem); line-height:1.65; margin:0}
.card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-lg);
  transition:border-color .15s, transform .15s, background .15s; color:var(--ink);
}
.card.is-link{cursor:pointer; text-decoration:none}
.card.is-link:hover{border-color:var(--line-2); background:var(--surface-2); text-decoration:none}

/* hero */
.hero{padding:80px 0 48px; text-align:center}
.eyebrow{font:600 .78rem/1 var(--font-head); letter-spacing:.14em; text-transform:uppercase; color:var(--accent); margin:0 0 20px}
.hero h1{font-size:clamp(2.3rem,6.4vw,4rem); font-weight:800; line-height:1.05; letter-spacing:-.025em; margin:0 auto 20px; max-width:14em}
.hero .lede{max-width:58ch; margin:0 auto 32px}
.hero-note{color:var(--ink-3); font-size:.875rem; margin:16px 0 0}
.hero-media{
  margin:56px auto 0; max-width:1000px; border-radius:var(--r-lg); overflow:hidden;
  border:1px solid var(--line-2); box-shadow:0 30px 80px -20px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.02);
}
.placeholder{
  aspect-ratio:16/9; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:14px;
  background:repeating-linear-gradient(45deg, var(--surface) 0 14px, #232324 14px 28px); color:var(--ink-2); padding:24px;
}
.ph-grid{display:grid; grid-template-columns:repeat(6,1fr); gap:10px; width:min(520px,80%)}
.ph-grid i{aspect-ratio:9/16; border-radius:6px; background:var(--surface-2); border:1px solid var(--line-2)}
.ph-label{margin:0; font-weight:500}

/* device strip */
.strip{padding:8px 0 24px}
.strip .wrap{display:flex; align-items:center; justify-content:center; gap:20px; flex-wrap:wrap}
.strip-title{color:var(--ink-3); font-size:.8rem; text-transform:uppercase; letter-spacing:.12em; font-weight:600}
.strip ul{display:flex; gap:24px; list-style:none; margin:0; padding:0; flex-wrap:wrap; justify-content:center}
.strip li{display:flex; align-items:center; gap:8px; color:var(--ink-2); font-weight:500}

/* features */
.feature-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.feature{padding:24px}
.feature-icon{
  display:inline-flex; width:40px; height:40px; align-items:center; justify-content:center;
  border-radius:10px; background:var(--accent-soft); color:var(--accent); margin-bottom:16px;
}
.feature h3{font-size:1.06rem; margin:0 0 6px}
.feature p{color:var(--ink-2); font-size:.94rem; margin:0}
@media (max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.feature-grid{grid-template-columns:1fr}}

/* steps */
.steps{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; list-style:none; margin:0; padding:0; counter-reset:s}
.step{display:flex; flex-direction:column; height:100%; padding:28px 24px; position:relative}
.step-num{
  font:800 1rem/1 var(--font-head); width:36px; height:36px; display:inline-flex; align-items:center; justify-content:center;
  border-radius:50%; border:1.5px solid var(--accent); color:var(--accent); margin-bottom:18px;
}
.step h3{font-size:1.1rem; margin:0 0 6px}
.step p{color:var(--ink-2); font-size:.94rem; margin:0 0 16px}
.step-go{margin-top:auto; color:var(--ink-3); transition:transform .15s, color .15s}
.step:hover .step-go{color:var(--accent); transform:translateX(4px)}
@media (max-width:800px){.steps{grid-template-columns:1fr}}

/* devices */
.device-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(200px,1fr)); gap:16px}
.device-grid.compact{grid-template-columns:repeat(auto-fill,minmax(180px,1fr)); gap:12px}
.device{display:flex; flex-direction:column; align-items:flex-start; gap:6px; padding:20px; text-align:left; font:inherit}
.device-icon{color:var(--ink-3); margin-bottom:6px}
.device-icon .ic{width:28px; height:28px}
.device-name{font:700 1.05rem/1.2 var(--font-head)}
.device-meta{color:var(--ink-2); font-size:.875rem}
.badges{display:flex; gap:6px; flex-wrap:wrap; margin-top:4px}
.badge{font-size:.75rem; font-weight:600; padding:3px 8px; border-radius:999px; background:var(--accent-soft); color:var(--accent)}
.device-cta{display:inline-flex; align-items:center; gap:6px; margin-top:auto; padding-top:10px; color:var(--accent); font-size:.9rem; font-weight:600}
.device-cta .ic{width:16px; height:16px}
.device[aria-pressed="true"]{border-color:var(--accent); background:var(--accent-soft)}

/* pricing panel / band */
.panel{
  text-align:center; padding:56px 32px; border-radius:var(--r-lg); border:1px solid var(--line-2);
  background:linear-gradient(160deg, rgba(139,111,192,.16), rgba(139,111,192,.02) 60%), var(--surface);
}
.panel h2{font-size:clamp(1.6rem,3.6vw,2.2rem); margin:0 0 12px}
.panel .lede{max-width:52ch; margin:0 auto 28px}
.band{text-align:center; border-top:1px solid var(--line)}
.band h2{font-size:clamp(1.6rem,3.6vw,2.3rem); margin:0 0 28px}

/* faq */
.faq{display:flex; flex-direction:column; gap:10px}
.faq details{background:var(--surface); border:1px solid var(--line); border-radius:var(--r)}
.faq summary{
  cursor:pointer; padding:18px 52px 18px 20px; font-weight:600; list-style:none; position:relative;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:""; position:absolute; right:22px; top:50%; width:9px; height:9px; margin-top:-6px;
  border-right:2px solid var(--ink-2); border-bottom:2px solid var(--ink-2); transform:rotate(45deg); transition:transform .15s;
}
.faq details[open] summary::after{transform:rotate(225deg); margin-top:-2px}
.faq details p{margin:0; padding:0 20px 18px; color:var(--ink-2)}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line); padding:56px 0 32px; color:var(--ink-2); font-size:.9rem; background:var(--bg-2)}
.footer-grid{display:grid; grid-template-columns:1.6fr repeat(3,1fr); gap:32px}
.footer-brand p{max-width:34ch; margin:14px 0 0}
.site-footer h4{font-size:.8rem; text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); margin:0 0 12px}
.site-footer ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:8px}
.site-footer a{color:var(--ink-2)} .site-footer a:hover{color:var(--ink)}
.disclaimer{margin:40px 0 0; padding-top:24px; border-top:1px solid var(--line); font-size:.82rem; color:var(--ink-3); max-width:90ch}
.copy{margin:12px 0 0; font-size:.82rem; color:var(--ink-3)}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}

/* ---------- docs ---------- */
.docs-layout{display:grid; grid-template-columns:240px minmax(0,1fr); gap:48px; padding-top:40px; padding-bottom:96px; align-items:start}
.doc-nav{position:sticky; top:calc(var(--header-h) + 24px); max-height:calc(100vh - var(--header-h) - 48px); overflow:auto; font-size:.92rem}
.doc-nav-home{display:block; font-weight:600; color:var(--ink); padding:6px 10px; border-radius:var(--r-sm); margin-bottom:12px}
.doc-nav-group{margin-bottom:20px}
.doc-nav h4{font-size:.75rem; text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); margin:0 0 6px; padding:0 10px}
.doc-nav ul{list-style:none; margin:0; padding:0}
.doc-nav li a{display:flex; align-items:center; gap:6px; padding:6px 10px; border-radius:var(--r-sm); color:var(--ink-2)}
.doc-nav a:hover{background:var(--surface); color:var(--ink); text-decoration:none}
.doc-nav a.is-active{background:var(--accent-soft); color:var(--ink); font-weight:500}
.doc-nav a.is-read::after{content:"✓"; margin-left:auto; color:var(--ok); font-size:.8rem}
.doc-nav-toggle{display:none}
.doc-locale{display:grid; grid-template-columns:minmax(0,1fr) 200px; gap:40px; align-items:start}
.doc-locale[hidden]{display:none}
.doc-toc{position:sticky; top:calc(var(--header-h) + 24px); font-size:.86rem; border-left:1px solid var(--line); padding-left:16px}
.doc-toc h4{font-size:.75rem; text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); margin:0 0 8px}
.doc-toc ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:6px}
.doc-toc a{color:var(--ink-2)} .doc-toc a.is-current{color:var(--accent)}
@media (max-width:1100px){.doc-locale{grid-template-columns:minmax(0,1fr)}.doc-toc{display:none}}
@media (max-width:860px){
  .docs-layout{grid-template-columns:1fr; gap:16px; padding-top:20px}
  .doc-nav-toggle{display:inline-flex; justify-self:start}
  .doc-nav{display:none; position:static; max-height:none; background:var(--surface); border:1px solid var(--line); border-radius:var(--r); padding:16px 8px}
  .doc-nav.is-open{display:block}
}

/* prose */
.prose{max-width:72ch; min-width:0}
.prose h1{font-size:clamp(1.8rem,4vw,2.4rem); font-weight:800; margin:0 0 6px}
.prose h2{font-size:1.4rem; margin:44px 0 12px; padding-top:4px}
.prose h3{font-size:1.12rem; margin:28px 0 8px}
.prose h2,.prose h3{position:relative}
.anchor{position:absolute; left:-1.1em; color:var(--ink-3); opacity:0; font-weight:400; text-decoration:none!important}
.prose h2:hover .anchor,.prose h3:hover .anchor{opacity:1}
.prose p,.prose li{color:var(--ink)}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:6px 0}
.prose ol{counter-reset:li; list-style:none; padding-left:0}
.prose ol > li{counter-increment:li; position:relative; padding-left:44px; margin:14px 0}
.prose ol > li::before{
  content:counter(li); position:absolute; left:0; top:-1px; width:28px; height:28px; border-radius:50%;
  background:var(--accent-soft); color:var(--accent); font:700 .85rem/28px var(--font-head); text-align:center;
}
.prose strong{color:#ececec; font-weight:600}
.prose em{color:var(--ink); font-style:normal; background:var(--surface-2); border-radius:4px; padding:0 .3em}
.doc-updated{color:var(--ink-3); font-size:.85rem; margin:0 0 16px}
.doc-meta{display:flex; flex-wrap:wrap; gap:12px; align-items:center; justify-content:space-between; padding:14px 0; margin-bottom:8px; border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.doc-applies [data-i18n]::after{content:":"}
.doc-applies{display:flex; flex-wrap:wrap; gap:6px; align-items:center; color:var(--ink-2); font-size:.88rem}
.chip{
  display:inline-flex; align-items:center; gap:6px; padding:5px 10px; border-radius:999px; font:500 .84rem var(--font);
  background:var(--surface); border:1px solid var(--line); color:var(--ink-2); cursor:default;
}
.chip code{background:none; border:0; padding:0; font-size:.8rem}
button.chip{cursor:pointer} button.chip:hover{border-color:var(--line-2); color:var(--ink)}
.chip.is-on{background:var(--accent-soft); border-color:var(--accent); color:var(--ink)}
kbd{
  display:inline-block; font:600 .8rem/1 var(--font); padding:5px 8px 4px; margin:0 1px; border-radius:6px;
  background:var(--surface-2); border:1px solid var(--line-2); border-bottom-width:3px; color:#ececec; white-space:nowrap;
}
.callout{display:flex; gap:12px; padding:14px 16px; border-radius:var(--r); margin:20px 0; border:1px solid; border-left-width:4px}
.callout p{margin:0}
.callout-icon{flex:none; line-height:1.6}
.callout.note{background:var(--note-bg); border-color:rgba(110,168,254,.3); border-left-color:var(--note)}
.callout.warning{background:var(--warn-bg); border-color:rgba(229,184,79,.3); border-left-color:var(--warn)}
.callout.danger{background:var(--danger-bg); border-color:rgba(240,113,120,.3); border-left-color:var(--danger)}
.prose li .callout{margin:10px 0 0}
blockquote{margin:20px 0; padding:4px 16px; border-left:3px solid var(--line-2); color:var(--ink-2)}
.table-wrap{overflow-x:auto; margin:20px 0; border:1px solid var(--line); border-radius:var(--r)}
table{border-collapse:collapse; width:100%; font-size:.92rem}
th,td{padding:10px 14px; text-align:left; border-bottom:1px solid var(--line); vertical-align:top}
th{background:var(--surface); font-weight:600; color:var(--ink); white-space:nowrap}
tr:last-child td{border-bottom:0}
.code{position:relative; margin:20px 0}
.code pre{margin:0; padding:16px; background:var(--bg-2); border:1px solid var(--line); border-radius:var(--r); overflow-x:auto}
.code pre code{background:none; border:0; padding:0}
.copy{position:absolute; top:8px; right:8px; font:500 .75rem var(--font); padding:4px 8px; border-radius:6px; background:var(--surface-2); border:1px solid var(--line-2); color:var(--ink-2); cursor:pointer}

.pager{display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-top:56px; max-width:72ch}
.pager a{display:flex; flex-direction:column; gap:2px; padding:16px 18px}
.pager a.next{text-align:right}
.pager small{color:var(--ink-3); font-size:.8rem}
.pager span{font-weight:600}

/* install path */
.install-path{
  margin-bottom:28px; padding:16px 18px; border-radius:var(--r); border:1px solid var(--line-2); background:var(--surface); max-width:72ch;
}
.ip-head{display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:10px; font-size:.88rem; color:var(--ink-2)}
.ip-head strong{color:var(--ink)}
.ip-head button{background:none; border:0; color:var(--accent); font:inherit; cursor:pointer; padding:0}
.ip-steps{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:4px}
.ip-steps a{display:flex; align-items:center; gap:12px; padding:8px 10px; border-radius:var(--r-sm); color:var(--ink-2)}
.ip-steps a:hover{background:var(--surface-2); text-decoration:none; color:var(--ink)}
.ip-steps .n{
  flex:none; width:24px; height:24px; border-radius:50%; border:1.5px solid var(--line-2);
  display:inline-flex; align-items:center; justify-content:center; font:700 .75rem var(--font-head);
}
.ip-steps .is-read .n{background:var(--ok); border-color:var(--ok); color:#11331a}
.ip-steps .is-current{background:var(--accent-soft); color:var(--ink)}
.ip-steps .is-current .n{border-color:var(--accent); color:var(--accent)}
.ip-steps.big a{padding:14px 16px; font-size:1.02rem; border:1px solid var(--line); background:var(--surface)}
.ip-steps.big{gap:10px}

/* docs index */
.picker h1{font-size:clamp(1.8rem,4vw,2.4rem); font-weight:800; margin:0 0 8px}
.picker .lede{margin-bottom:28px}
.picker-unsure{margin:16px 0 0; font-size:.92rem}
.path-result{margin-top:40px}
.path-result h2{font-size:1.3rem; margin:0 0 16px; display:flex; gap:12px; align-items:baseline; flex-wrap:wrap}
.path-result h2 button{background:none; border:0; color:var(--accent); font:500 .9rem var(--font); cursor:pointer; padding:0}
.doc-search{margin-top:56px; padding-top:32px; border-top:1px solid var(--line)}
.search{display:flex; align-items:center; gap:10px; padding:0 14px; border:1px solid var(--line-2); border-radius:var(--r); background:var(--surface); color:var(--ink-3); max-width:420px}
.search input{flex:1; background:none; border:0; color:var(--ink); font:inherit; padding:12px 0; outline:none}
.search:focus-within{border-color:var(--accent)}
.doc-list{list-style:none; margin:16px 0 0; padding:0; display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:10px}
.doc-list a{display:flex; justify-content:space-between; align-items:center; gap:12px; padding:14px 16px; font-weight:500}
.doc-list .ic{color:var(--ink-3); width:16px; height:16px}

/* ---------- downloads ---------- */
.chips{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:24px}
.dl-list{display:flex; flex-direction:column; gap:12px; margin-bottom:24px}
.dl{padding:20px 22px; display:flex; flex-direction:column; gap:14px; scroll-margin-top:calc(var(--header-h) + 24px)}
.dl:target{border-color:var(--accent)}
.dl[hidden]{display:none}
.dl-head{display:flex; flex-wrap:wrap; align-items:baseline; gap:6px 16px}
.dl h3{font-size:1.06rem; margin:0; flex:1 1 100%}
.dl-devices{margin:0; color:var(--ink-2); font-size:.88rem; display:flex; gap:6px; flex-wrap:wrap}
.dl-guide{display:inline-flex; align-items:center; gap:4px; font-size:.88rem; font-weight:500}
.dl-guide .ic{width:14px; height:14px}
.dl-variants{display:flex; flex-wrap:wrap; gap:8px}

@media (max-width:600px){
  .wrap{padding:0 16px}
  .section{padding:64px 0}
  .hero{padding:48px 0 32px}
  .hero-media{margin-top:40px}
  .btn{padding:12px 20px}
  .pager{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important; scroll-behavior:auto!important}}