/* VAMX unified site — shared styles for marketing pages.
   One palette for the whole site: brand blue (same primary as the SaaS workbench, style/theme.css) on navy. */
*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: light; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
img, svg, video, canvas { max-width: 100%; }
[hidden] { display: none !important; }

:root{
  /* neutrals */
  --paper:#F4F6FA;
  --surface:#FFFFFF;
  --surface-2:#EDF1F7;
  --line:#D9E0EB;
  --line-soft:#E7ECF3;
  --ink:#0F1B33;
  --muted:#56637A;
  --faint:#8592A8;

  /* brand */
  --brand:#1248B5;
  --brand-ink:#0D3A94;
  --brand-wash:#EAF0FB;
  --brand-soft:#BFD0F0;

  /* navy panels (hero, bands, footer) */
  --panel:#0B1630;
  --panel-2:#12203F;
  --panel-line:#24365C;
  --panel-ink:#EEF2FA;
  --panel-muted:#9DAECB;
  --brand-dark:#7FA8FF;
  --brand-dark-wash:rgba(127,168,255,.14);

  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;

  --fs-hero:clamp(2.05rem,1.2rem + 3.4vw,3.5rem);
  --fs-h2:clamp(1.45rem,1.1rem + 1.35vw,2.1rem);
  --fs-h3:1.08rem;
  --fs-body:1rem;
  --fs-small:.9375rem;
  --fs-micro:.78rem;
  --gutter:clamp(16px,4.5vw,48px);
  --r:6px;
}

/* per-locale system font stacks (pages set <html lang>) */
:root:lang(en),:root:lang(vi){
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;}
:root:lang(ja){
  --sans:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Yu Gothic",Meiryo,"Noto Sans JP","Segoe UI",sans-serif;}
:root:lang(ko){
  --sans:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR","Segoe UI",sans-serif;}
:lang(ko) body{word-break:keep-all;overflow-wrap:anywhere;}
:lang(en) body,:lang(vi) body{line-height:1.65;}

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--fs-body);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;text-wrap:balance;letter-spacing:.01em;}
p{margin:0;}
a{color:inherit;}
ul,ol{margin:0;padding:0;}
::selection{background:var(--brand-soft);}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:3px;}

.shell{padding-inline:var(--gutter);}
.inner{max-width:1180px;margin:0 auto;}
.mono{font-family:var(--mono);}
.link{color:var(--brand);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:inherit;font-size:var(--fs-small);font-weight:600;line-height:1.2;text-decoration:none;white-space:nowrap;
  padding:12px 20px;border-radius:var(--r);border:1px solid transparent;cursor:pointer;
  transition:background-color .15s ease,border-color .15s ease,color .15s ease;}
.btn-sm{padding:8px 14px;font-size:.875rem;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-ink);}
.btn-line{background:var(--surface);border-color:var(--line);color:var(--ink);}
.btn-line:hover{border-color:var(--brand);color:var(--brand);}
.btn-dark-line{border-color:var(--panel-line);color:var(--panel-ink);background:transparent;}
.btn-dark-line:hover{border-color:var(--brand-dark);color:#fff;}
.arrow::after{content:"→";font-weight:400;}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4) blur(8px);}
.head-row{display:flex;align-items:center;gap:20px;min-height:64px;}
.site-head .inner{max-width:1360px;}  /* wider than content so longer nav labels (e.g. Vietnamese) still fit on one row */
.brand{display:flex;align-items:center;flex-shrink:0;}
.brand img{height:30px;width:auto;display:block;}
.menu{display:flex;align-items:center;gap:4px;flex:1;min-width:0;}
.menu > a{font-size:.9375rem;color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:var(--r);white-space:nowrap;}
.menu > a:hover{color:var(--ink);background:var(--surface-2);}
.menu > a.active{color:var(--brand);font-weight:600;}
.menu-tail{display:flex;align-items:center;gap:10px;margin-inline-start:auto;}
.burger{display:none;margin-inline-start:auto;background:none;border:1px solid var(--line);border-radius:var(--r);
  width:42px;height:38px;padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:1px;}

.lang{position:relative;}
.lang summary{list-style:none;cursor:pointer;font-size:.875rem;color:var(--muted);
  padding:7px 26px 7px 10px;border:1px solid var(--line);border-radius:var(--r);position:relative;white-space:nowrap;}
.lang summary::-webkit-details-marker{display:none;}
.lang summary::after{content:"";position:absolute;right:10px;top:50%;width:6px;height:6px;margin-top:-5px;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);}
.lang ul{list-style:none;position:absolute;right:0;top:calc(100% + 6px);min-width:150px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);padding:6px;box-shadow:0 10px 30px rgba(15,27,51,.12);z-index:5;}
.lang li a{display:block;padding:7px 10px;border-radius:4px;text-decoration:none;font-size:.9rem;}
.lang li a:hover{background:var(--surface-2);}
.lang li a[aria-current]{color:var(--brand);font-weight:600;}

/* Collapsed header. site.js adds .collapsed whenever the nav does not fit on one row
   (label length differs per language); the media query only covers first paint before .measured. */
@media (max-width:1140px){
  .site-head:not(.measured) .burger{display:flex;}
  .site-head:not(.measured) .menu{display:none;}
}
.site-head.collapsed .burger{display:flex;}
.site-head.collapsed .menu{display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);
  border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;
  padding:8px var(--gutter) 18px;box-shadow:0 16px 30px rgba(15,27,51,.08);}
.site-head.collapsed.open .menu{display:flex;}
.site-head.collapsed .menu > a{padding:12px 4px;border-bottom:1px solid var(--line-soft);border-radius:0;}
.site-head.collapsed .menu-tail{margin:14px 0 0;flex-wrap:wrap;}
.site-head.collapsed .lang ul{left:0;right:auto;}

/* ---------- labels shared by light and dark sections ---------- */
.eyebrow,.sec-label{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.14em;color:var(--brand);}
.sec-label{margin-bottom:12px;}
.tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.05em;padding:3px 9px;border-radius:3px;white-space:nowrap;align-self:start;
  background:var(--brand-wash);color:var(--brand);}

/* ---------- hero (navy): SaaS entry + 3-step workspace demo ---------- */
.hero{background:var(--panel);color:var(--panel-ink);}
.hero .inner{padding-block:clamp(40px,6vw,80px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(28px,4.5vw,64px);align-items:center;}
.hero-copy{display:flex;flex-direction:column;gap:20px;}
.hero .eyebrow{color:var(--brand-dark);}
.hero h1{font-size:clamp(2rem,1.1rem + 2.6vw,3.1rem);font-weight:800;line-height:1.2;letter-spacing:.01em;}
:lang(en) .hero h1,:lang(vi) .hero h1{font-size:clamp(1.9rem,1rem + 1.9vw,2.6rem);letter-spacing:0;}
.hero h1 em{font-style:normal;color:var(--brand-dark);}
.hero .sub{color:var(--panel-muted);font-size:clamp(1rem,.95rem + .3vw,1.1rem);max-width:38em;}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;}
.btn-lg{padding:14px 26px;font-size:1rem;}
.quick{list-style:none;display:flex;flex-direction:column;gap:12px;}
.quick li{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;}
.quick .n{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-size:.8rem;
  color:var(--brand-dark);border:1px solid var(--panel-line);background:var(--brand-dark-wash);}
.quick .qt{display:flex;flex-direction:column;line-height:1.5;padding-top:2px;}
.quick b{color:var(--panel-ink);font-weight:600;}
.quick .qt > span{color:var(--panel-muted);font-size:.9rem;}
.hero-note{font-size:.88rem;color:var(--panel-muted);}
.hero-note a{color:var(--brand-dark);}
@media (max-width:900px){ .hero .inner{grid-template-columns:1fr;} }

/* workspace demo window (light UI on the navy hero) */
.app{background:var(--surface);color:var(--ink);border-radius:12px;overflow:hidden;
  box-shadow:0 30px 70px rgba(0,0,0,.35),0 0 0 1px rgba(255,255,255,.06);}
.app-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--surface-2);border-bottom:1px solid var(--line);font-size:.8rem;}
.app-bar .dots{display:flex;gap:6px;}
.app-bar .dots i{width:9px;height:9px;border-radius:50%;background:var(--line);}
.app-title{font-weight:600;}
.app-quota{margin-inline-start:auto;color:var(--muted);font-family:var(--mono);font-size:.72rem;white-space:nowrap;}
.stage{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line-soft);transition:opacity .4s ease;}
.stage:last-child{border-bottom:none;}
.app.playing .stage:not(.on):not(.done){opacity:.4;}
.stage .sn{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-size:.75rem;
  background:var(--surface-2);color:var(--muted);transition:background-color .3s ease,color .3s ease;}
.stage.on .sn{background:var(--brand);color:#fff;}
.stage.done .sn{background:var(--brand-wash);color:var(--brand);}
.stage-body{display:flex;flex-direction:column;gap:8px;min-width:0;}
.stage-head{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:.9rem;}
.stage-head .st{font-family:var(--mono);font-size:.72rem;color:var(--muted);white-space:nowrap;}
.stage-head .done-t{display:none;}
.stage.on .st,.stage.done .st{color:var(--brand);}
.stage.done .doing-t{display:none;}
.stage.done .done-t{display:inline;}
.tabs,.chips,.exports{display:flex;gap:6px;flex-wrap:wrap;}
.tabs span{font-size:.75rem;padding:3px 10px;border-radius:20px;background:var(--surface-2);color:var(--muted);}
.tabs span.on{background:var(--brand-wash);color:var(--brand);font-weight:600;}
.chips span{font-size:.72rem;padding:2px 8px;border-radius:3px;background:var(--brand-wash);color:var(--brand);}
.exports span{font-family:var(--mono);font-size:.7rem;padding:3px 8px;border:1px solid var(--line);border-radius:4px;}
.file{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--line);border-radius:var(--r);}
.file .ftype{font-family:var(--mono);font-size:.68rem;font-weight:600;color:#fff;background:var(--brand);border-radius:4px;padding:3px 6px;}
.file .fmeta{display:flex;flex-direction:column;line-height:1.4;min-width:0;}
.file .fmeta b{font-size:.85rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.file .fmeta span{font-size:.72rem;color:var(--muted);}
.meter{height:4px;border-radius:2px;background:var(--surface-2);overflow:hidden;}
.meter i{display:block;height:100%;width:var(--p,100%);background:var(--brand);}
.app canvas{display:block;width:100%;height:56px;--wave-bg:var(--surface);--wave-off:var(--line);--wave-on:var(--brand);}
.transcript{display:flex;flex-direction:column;gap:6px;}
.tline{font-size:.84rem;line-height:1.55;display:grid;grid-template-columns:auto 1fr;gap:10px;}
.tline .who{font-family:var(--mono);font-size:.7rem;color:var(--brand);padding-top:2px;white-space:nowrap;}
.summary-line{padding:8px 10px;border-radius:4px;background:var(--brand-wash);font-size:.8rem;color:var(--muted);}
.summary-line b{color:var(--brand-ink);font-weight:600;}

.facts{background:var(--panel-2);border-top:1px solid var(--panel-line);color:var(--panel-muted);}
.facts .inner{display:flex;flex-wrap:wrap;gap:8px 32px;padding-block:14px;font-size:.86rem;}
.facts b{color:var(--panel-ink);font-weight:600;margin-inline-end:4px;}

/* ---------- page hero (light, sub pages) ---------- */
.phero{background:var(--surface);border-bottom:1px solid var(--line);}
.phero .inner{padding-block:clamp(44px,6vw,80px);display:flex;flex-direction:column;gap:18px;}
.phero h1{font-size:clamp(1.9rem,1.2rem + 2.6vw,3rem);font-weight:800;max-width:22em;}
.phero h1 em{font-style:normal;color:var(--brand);}
.phero .sub{color:var(--muted);max-width:44em;font-size:1.05rem;}
.phero .sub a{color:var(--brand);}

/* ---------- sections ---------- */
section{padding-block:clamp(52px,7vw,92px);}
section.tight-top{padding-top:0;}
section.alt{background:var(--surface);border-block:1px solid var(--line);}
h2{font-size:var(--fs-h2);font-weight:800;max-width:24em;}
.sec-intro{max-width:46em;color:var(--muted);margin-top:14px;}
.stack{display:flex;flex-direction:column;gap:clamp(26px,4vw,42px);}
.sec-head-row{display:flex;justify-content:space-between;align-items:end;gap:18px;flex-wrap:wrap;}

.grid{display:grid;gap:18px;}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));}
.g3{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));}
.g4{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;
  display:flex;flex-direction:column;gap:10px;transition:border-color .15s ease;}
.card:hover{border-color:var(--brand-soft);}
.card .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.08em;color:var(--faint);}
.card h3{font-size:var(--fs-h3);}
.card p{font-size:var(--fs-small);color:var(--muted);}
.card .ico{width:40px;height:40px;border-radius:8px;display:grid;place-items:center;background:var(--brand-wash);color:var(--brand);}
.card .ico svg{width:22px;height:22px;}
.card .more{margin-top:auto;padding-top:6px;font-size:.9rem;font-weight:600;color:var(--brand);text-decoration:none;}
.card .more:hover{text-decoration:underline;}

.ticks{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:var(--fs-small);}
.ticks li{position:relative;padding-inline-start:22px;}
.ticks li::before{content:"";position:absolute;left:2px;top:.62em;width:10px;height:6px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg);}

/* two business lines */
.lines{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,440px),1fr));gap:18px;}
.line-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  display:flex;flex-direction:column;}
.line-card header{padding:26px 26px 18px;border-top:4px solid var(--brand);display:flex;flex-direction:column;gap:8px;}
.line-card header .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.12em;color:var(--brand);}
.line-card header h3{font-size:1.4rem;font-weight:800;}
.line-card header p{color:var(--muted);font-size:var(--fs-small);}
.line-card .body{padding:0 26px 26px;display:flex;flex-direction:column;gap:18px;flex:1;}
.line-card .links{margin-top:auto;display:flex;gap:10px;flex-wrap:wrap;}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:24px;}
.step{display:flex;flex-direction:column;gap:8px;padding-top:18px;border-top:2px solid var(--brand);}
.step .k{font-family:var(--mono);font-size:var(--fs-micro);color:var(--brand);letter-spacing:.1em;}
.step h3{font-size:var(--fs-h3);}
.step p{font-size:var(--fs-small);color:var(--muted);}

/* process (ODM) */
.process{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;counter-reset:p;}
.process li{background:var(--surface);padding:22px 20px;display:flex;flex-direction:column;gap:6px;counter-increment:p;}
.process li::before{content:counter(p,decimal-leading-zero);font-family:var(--mono);font-size:var(--fs-micro);color:var(--brand);letter-spacing:.1em;}
.process h3{font-size:1rem;}
.process p{font-size:.9rem;color:var(--muted);}

/* navy band */
.band{background:var(--panel);color:var(--panel-ink);}
.band .sec-label{color:var(--brand-dark);}
.band .sec-intro{color:var(--panel-muted);}
.band .tag{background:var(--brand-dark-wash);color:var(--brand-dark);}
.layers{display:flex;flex-direction:column;gap:1px;background:var(--panel-line);border:1px solid var(--panel-line);border-radius:var(--r);overflow:hidden;}
.layer{background:var(--panel-2);padding:20px 24px;display:grid;grid-template-columns:minmax(170px,1fr) 2.2fr auto;gap:10px 24px;align-items:start;}
.layer h3{font-size:var(--fs-h3);}
.layer h3 small{display:block;font-weight:400;font-size:.8rem;color:var(--panel-muted);margin-top:2px;}
.layer .what{font-size:.9rem;color:var(--panel-muted);line-height:1.8;}
@media (max-width:720px){ .layer{grid-template-columns:1fr;} }

/* spec sheet */
.specsheet{border:1px solid var(--line);background:var(--surface);border-radius:var(--r);overflow:hidden;}
.specsheet header{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:baseline;}
.specsheet header h3{font-size:1.3rem;}
.specsheet header .note{font-size:var(--fs-micro);color:var(--muted);font-family:var(--mono);}
.specrows{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));}
.specrow{padding:15px 24px;border-bottom:1px solid var(--line-soft);display:flex;flex-direction:column;gap:2px;}
.specrow .k{font-size:var(--fs-micro);color:var(--faint);letter-spacing:.06em;}
.specrow .v{font-size:var(--fs-small);font-weight:600;}

/* numbered requirement list */
.reqs{display:flex;flex-direction:column;}
.req{display:grid;grid-template-columns:auto 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--line-soft);font-size:var(--fs-small);}
.req:first-child{padding-top:0;}
.req .n{font-family:var(--mono);font-size:var(--fs-micro);color:var(--brand);padding-top:3px;}
.req .t{font-weight:600;display:block;}
.req .d{display:block;color:var(--muted);font-size:.9rem;}

.feature-panel{background:var(--surface);border:1px solid var(--line);border-inline-start:4px solid var(--brand);border-radius:var(--r);
  padding:clamp(24px,4vw,40px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;}
.feature-panel p{color:var(--muted);font-size:var(--fs-small);margin-top:12px;}
.feature-panel p a{color:var(--brand);}
@media (max-width:820px){ .feature-panel{grid-template-columns:1fr !important;} }

/* platform logos (link import) */
.platforms{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:.88rem;color:var(--muted);}
.platforms img{width:28px;height:28px;border-radius:6px;}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:18px;align-items:stretch;}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;display:flex;flex-direction:column;gap:14px;position:relative;}
.plan.featured{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand);}
.plan.featured .badge{position:absolute;top:-11px;left:22px;background:var(--brand);color:#fff;font-size:.75rem;font-weight:600;padding:2px 10px;border-radius:20px;}
.plan .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.1em;color:var(--faint);}
.plan h3{font-size:1.2rem;}
.plan .tagline{font-size:.9rem;color:var(--muted);margin-top:-8px;}
.plan .amt{font-size:2.2rem;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums;}
.plan .amt small{font-size:.9rem;font-weight:500;color:var(--muted);}
.plan .amt .cur{font-size:1.2rem;vertical-align:.5em;margin-inline-end:2px;}
.plan .foot{margin-top:auto;padding-top:6px;}
.plan .foot .btn{width:100%;}
.note-line{font-size:.85rem;color:var(--muted);}

/* code */
.dev{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:36px;align-items:start;}
@media (max-width:860px){ .dev{grid-template-columns:1fr;} }
.devlist{display:flex;flex-direction:column;gap:16px;}
.devitem{display:flex;flex-direction:column;gap:4px;padding-bottom:14px;border-bottom:1px solid var(--line);}
.devitem h3{font-size:var(--fs-h3);}
.devitem p{font-size:var(--fs-small);color:var(--muted);}
.code{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);overflow:hidden;direction:ltr;}
.code .bar{display:flex;justify-content:space-between;gap:10px;padding:10px 14px;border-bottom:1px solid var(--panel-line);
  font-family:var(--mono);font-size:var(--fs-micro);color:var(--panel-muted);}
.code pre{margin:0;padding:18px 16px;overflow-x:auto;font-family:var(--mono);font-size:.8rem;line-height:1.85;color:var(--panel-ink);}
.code .c{color:#6F82A8;} .code .s{color:#B8CCF2;} .code .kw{color:var(--brand-dark);} .code .fn{color:#FFFFFF;font-weight:500;}

/* FAQ */
.faq-group{display:flex;flex-direction:column;gap:14px;}
.faq-group + .faq-group{margin-top:clamp(30px,4vw,48px);}
.faq-group > h3{font-size:1.15rem;display:flex;align-items:center;gap:10px;}
.faq-group > p{color:var(--muted);}
.faq-group > p a{color:var(--brand);}
.qa{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);}
.qa[open]{border-color:var(--brand-soft);}
.qa summary{list-style:none;cursor:pointer;padding:16px 48px 16px 20px;font-weight:600;position:relative;}
.qa summary::-webkit-details-marker{display:none;}
.qa summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.3rem;font-weight:400;color:var(--brand);}
.qa[open] summary::after{content:"−";}
.qa .a{padding:0 20px 18px;color:var(--muted);font-size:var(--fs-small);display:flex;flex-direction:column;gap:8px;}
.qa .a a{color:var(--brand);}

/* forms */
.form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.form .full{grid-column:1 / -1;}
@media (max-width:640px){ .form{grid-template-columns:1fr;} }
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-size:.88rem;font-weight:600;}
.field label .req-mark{color:var(--brand);margin-inline-start:2px;}
.field input,.field select,.field textarea{font:inherit;font-size:.95rem;color:var(--ink);background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);padding:10px 12px;width:100%;}
.field textarea{min-height:120px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-wash);}
.form-note{font-size:.85rem;color:var(--muted);}
.form-msg{font-size:.9rem;color:var(--brand-ink);background:var(--brand-wash);border-radius:var(--r);padding:10px 14px;}

/* download tiles */
.dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:18px;}
.dl-tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;align-items:flex-start;gap:12px;text-decoration:none;}
a.dl-tile:hover{border-color:var(--brand);}
.dl-tile .os{display:flex;align-items:center;gap:12px;font-size:1.1rem;font-weight:700;}
.dl-tile .os img{width:36px;height:36px;object-fit:contain;}
.dl-tile .ver{font-size:.85rem;color:var(--muted);}
.dl-tile .qr{width:128px;height:128px;border:1px solid var(--line);border-radius:4px;}

/* hardware illustrations (images/hw/*.svg) */
.products{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:18px;}
.product{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .15s ease,box-shadow .2s ease;}
.product:hover{border-color:var(--brand-soft);box-shadow:0 14px 34px rgba(15,27,51,.08);}
.product-visual,.component-visual{background:radial-gradient(120% 90% at 50% 30%,#FFFFFF 0%,var(--surface-2) 75%);
  aspect-ratio:4 / 3;display:grid;place-items:center;padding:10px;perspective:900px;}
.product-visual{border-bottom:1px solid var(--line-soft);}
.product-visual img,.component-visual img{width:100%;height:100%;object-fit:contain;transition:transform .35s ease;}
.product:hover .product-visual img{transform:translateY(-4px) scale(1.02);}
.product-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.product-body .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.08em;color:var(--brand);}
.product-body h3{font-size:1.1rem;}
.product-body p{font-size:var(--fs-small);color:var(--muted);}
.spec-chips{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:6px;}
.spec-chips li{font-size:.75rem;padding:2px 8px;border-radius:3px;background:var(--brand-wash);color:var(--brand);}
.explode{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:center;}
@media (max-width:860px){ .explode{grid-template-columns:1fr;} }
.explode-visual{background:radial-gradient(90% 70% at 50% 40%,var(--panel-2) 0%,var(--panel) 80%);border-radius:10px;
  padding:clamp(16px,3vw,32px);perspective:1000px;}
.explode-visual img{display:block;width:100%;max-width:440px;height:auto;margin:0 auto;transition:transform .35s ease;}
.legend{list-style:none;counter-reset:part;display:flex;flex-direction:column;}
.legend li{counter-increment:part;display:grid;grid-template-columns:auto 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--line-soft);}
.legend li::before{content:counter(part);width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand);color:#fff;font-family:var(--mono);font-size:.8rem;font-weight:600;}
.legend b{display:block;font-weight:600;}
.legend span{display:block;color:var(--muted);font-size:.9rem;}
.components{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:16px;}
.component{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;}
.component-visual{border-bottom:1px solid var(--line-soft);}
.component:hover .component-visual img{transform:translateY(-3px) scale(1.03);}
.component-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;}
.component-body h3{font-size:1rem;}
.component-body p{font-size:.88rem;color:var(--muted);}
.hw-feature{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:20px;align-items:stretch;}
@media (max-width:860px){ .hw-feature{grid-template-columns:1fr;} }
.hw-feature .product-visual{border:1px solid var(--line);border-radius:var(--r);aspect-ratio:auto;min-height:240px;}

/* news list & article (server-rendered Thymeleaf templates blog.html / detail.html) */
.news-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(24px,4vw,48px);align-items:start;}
@media (max-width:900px){ .news-layout{grid-template-columns:1fr;} }
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 22px;text-decoration:none;color:inherit;transition:border-color .15s ease,box-shadow .15s ease;}
.news-item:hover{border-color:var(--brand-soft);box-shadow:0 6px 20px rgba(15,27,51,.06);}
.news-item .thumb{width:132px;aspect-ratio:4 / 3;flex-shrink:0;border-radius:4px;object-fit:cover;background:var(--surface-2);}
.news-item .body{display:flex;flex-direction:column;gap:6px;min-width:0;flex:1;}
.news-item .meta{font-family:var(--mono);font-size:var(--fs-micro);color:var(--faint);letter-spacing:.04em;}
.news-item h2{font-size:1.12rem;font-weight:700;line-height:1.45;max-width:none;}
.news-item:hover h2{color:var(--brand);}
.news-item .desc{font-size:var(--fs-small);color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-item .more{font-size:.88rem;font-weight:600;color:var(--brand);}
@media (max-width:560px){ .news-item{flex-direction:column;} .news-item .thumb{width:100%;} }
.pager{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;margin-top:22px;}
.pager .prev{grid-column:1;justify-self:start;}
.pager .pos{grid-column:2;font-family:var(--mono);font-size:.85rem;color:var(--muted);}
.pager .next{grid-column:3;justify-self:end;}
.empty-state{background:var(--surface);border:1px dashed var(--line);border-radius:var(--r);padding:40px 24px;
  display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--muted);text-align:center;}
.news-aside{display:flex;flex-direction:column;gap:16px;position:sticky;top:88px;}
@media (max-width:900px){ .news-aside{position:static;} }
.aside-cta{background:var(--panel);color:var(--panel-ink);border-radius:10px;padding:24px;display:flex;flex-direction:column;gap:12px;}
.aside-cta .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.12em;color:var(--brand-dark);}
.aside-cta h3{font-size:1.15rem;}
.aside-cta p{font-size:.9rem;color:var(--panel-muted);}
.aside-cta .btn{width:100%;}
.aside-links{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;display:flex;flex-direction:column;gap:8px;font-size:.92rem;}
.aside-links .h{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.1em;color:var(--faint);margin-bottom:4px;}
.aside-links a{color:var(--ink);text-decoration:none;}
.aside-links a:hover{color:var(--brand);}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:.85rem;color:var(--muted);min-width:0;}
.crumbs a{color:var(--muted);text-decoration:none;}
.crumbs a:hover{color:var(--brand);}
.crumbs [aria-current]{color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:min(28em,100%);}
.article{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:clamp(22px,4vw,44px);min-width:0;}
.article-head{display:flex;flex-direction:column;gap:12px;padding-bottom:22px;margin-bottom:26px;border-bottom:1px solid var(--line-soft);}
.article-head h1{font-size:clamp(1.6rem,1.2rem + 1.5vw,2.3rem);font-weight:800;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:.85rem;color:var(--muted);}
.article-body{font-size:1.02rem;line-height:1.9;color:var(--ink);overflow-wrap:anywhere;}
.article-body > * + *{margin-top:1em;}
.article-body h2,.article-body h3,.article-body h4{margin-top:1.6em;font-size:1.3rem;max-width:none;}
.article-body img{height:auto;border-radius:6px;}
.article-body a{color:var(--brand);}
.article-body ul,.article-body ol{padding-inline-start:1.4em;}
.article-body table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%;}
.article-body td,.article-body th{border:1px solid var(--line);padding:6px 10px;}
.article-foot{margin-top:32px;padding-top:22px;border-top:1px solid var(--line-soft);display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;}

/* CTA band */
.cta-band{background:var(--panel);color:var(--panel-ink);border-radius:10px;padding:clamp(28px,5vw,52px);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,360px),1fr));gap:24px;}
.cta-band .side{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-band .side + .side{border-inline-start:1px solid var(--panel-line);padding-inline-start:24px;}
@media (max-width:820px){ .cta-band .side + .side{border-inline-start:none;padding-inline-start:0;border-top:1px solid var(--panel-line);padding-top:24px;} }
.cta-band h3{font-size:1.35rem;}
.cta-band p{color:var(--panel-muted);font-size:var(--fs-small);}
.cta-band .k{font-family:var(--mono);font-size:var(--fs-micro);letter-spacing:.12em;color:var(--brand-dark);}

/* footer */
.site-foot{background:var(--panel);color:var(--panel-muted);}
.site-foot .inner{padding-block:48px 28px;display:flex;flex-direction:column;gap:32px;}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px;}
@media (max-width:900px){ .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));} .foot-brand{grid-column:1 / -1;} }
.foot-brand{display:flex;flex-direction:column;gap:10px;font-size:var(--fs-small);}
.wordmark{font-size:1.4rem;font-weight:900;letter-spacing:.06em;color:var(--panel-ink);}
.foot-mail{color:var(--panel-ink);text-decoration:none;font-family:var(--mono);font-size:.9rem;}
.foot-col{display:flex;flex-direction:column;gap:8px;font-size:var(--fs-small);}
.foot-col .h{font-size:var(--fs-micro);letter-spacing:.12em;color:var(--panel-ink);margin-bottom:4px;font-family:var(--mono);}
.foot-col a,.foot-bottom a{color:var(--panel-muted);text-decoration:none;}
.foot-col a:hover,.foot-bottom a:hover,.foot-mail:hover{color:var(--brand-dark);}
.foot-bottom{border-top:1px solid var(--panel-line);padding-top:20px;font-size:.82rem;
  display:flex;justify-content:space-between;gap:10px 24px;flex-wrap:wrap;}

@media (prefers-reduced-motion: reduce){ *{animation:none !important;transition:none !important;} html{scroll-behavior:auto;} }
