/* ModuleArk — site styles. Tokens first; everything else derives from them.
 * Design intent: editorial grid on cool-white paper, deep green primary, copper only for the main call to action,
 * and the "module" palette reserved for things that are genuinely vector elements (maps, chips, the signature stripe). */
@font-face{font-family:'Inter';src:url('/assets/fonts/InterVariable.woff2') format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('/assets/fonts/IBM-Plex-Mono-400.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('/assets/fonts/IBM-Plex-Mono-500.woff2') format('woff2');font-weight:500;font-display:swap}

:root{
  --paper:#F6F7F4;--surface:#FFFFFF;--ink:#152420;--ink-2:#34453F;--muted:#66746F;--line:#D7DDD8;--line-2:#E9EDE9;
  --primary:#0C5B49;--primary-ink:#09463A;--primary-soft:#E3EFEA;--accent:#C9641E;--accent-ink:#A24F15;--accent-soft:#F8EADF;
  --m-promoter:#E2A41C;--m-orf:#2E8B57;--m-tag:#7A5AC8;--m-reporter:#E25A3F;--m-marker:#3A7BD5;--m-reg:#8A9AA0;--m-ltr:#30414B;--m-itr:#30414B;--m-linker:#B59A5B;--m-polya:#9AA6B2;--m-misc:#8A9AA0;
  --radius:6px;--wrap:1180px;--gutter:20px;--header-h:64px;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shadow:0 12px 32px rgba(21,36,32,.12);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#11181A;--surface:#182022;--ink:#E8ECE9;--ink-2:#C5CCC8;--muted:#8F9B96;--line:#2B3537;--line-2:#222B2D;
    --primary:#3DA58A;--primary-ink:#5CC0A5;--primary-soft:#173129;--accent:#E07E3A;--accent-ink:#F09A5E;--accent-soft:#3A2619;
    --shadow:0 12px 32px rgba(0,0,0,.5);
  }
}
:root[data-theme="dark"]{
  --paper:#11181A;--surface:#182022;--ink:#E8ECE9;--ink-2:#C5CCC8;--muted:#8F9B96;--line:#2B3537;--line-2:#222B2D;
  --primary:#3DA58A;--primary-ink:#5CC0A5;--primary-soft:#173129;--accent:#E07E3A;--accent-ink:#F09A5E;--accent-soft:#3A2619;
  --shadow:0 12px 32px rgba(0,0,0,.5);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--font);font-feature-settings:'cv11','ss01';text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.02em;font-weight:650;margin:0 0 .5em;color:var(--ink)}
h1{font-size:clamp(2rem,1.3rem + 2.6vw,3rem)}
h2{font-size:clamp(1.45rem,1.2rem + 1vw,1.9rem);margin-top:2.2em;padding-top:.2em}
h3{font-size:1.15rem;margin-top:1.6em;font-weight:620}
p{margin:0 0 1em}
code{font:.92em var(--mono);background:var(--line-2);padding:.1em .35em;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:var(--radius);z-index:100}
.skip:focus{left:8px}
.eyebrow{font-size:.78rem;font-weight:650;letter-spacing:.12em;text-transform:uppercase;color:var(--primary);margin-bottom:.8em}
.lede{font-size:1.15rem;color:var(--ink-2);max-width:62ch;line-height:1.55}
.muted{color:var(--muted)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:44px;padding:9px 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--ink);font:600 .95rem/1.2 var(--font);text-decoration:none;cursor:pointer;transition:border-color .15s,background .15s,color .15s}
.btn:hover{text-decoration:none;border-color:var(--ink)}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-ink);border-color:var(--primary-ink)}
.btn.accent{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.accent:hover{background:var(--accent-ink);border-color:var(--accent-ink)}
.btn.small{min-height:40px;padding:7px 14px;font-size:.88rem}  /* 40px 下限：触屏 iPad 上页头按钮也要够大 */
.btn:disabled{opacity:.55;cursor:default}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line)}
.site-header::after{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--m-promoter) 0 16%,var(--m-orf) 16% 46%,var(--m-tag) 46% 58%,var(--m-reporter) 58% 76%,var(--m-marker) 76% 100%)}
.bar{display:flex;align-items:center;gap:28px;height:var(--header-h)}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;flex:0 0 auto}
.logo:hover{text-decoration:none}
.logo .mark{width:34px;height:34px}
.wordmark{font-size:1.22rem;font-weight:500;letter-spacing:-.02em}
.wordmark b{font-weight:760}
.site-nav{flex:1 1 auto}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.nav-item>a,.nav-btn{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 12px;border:0;background:none;border-radius:var(--radius);color:var(--ink);font:500 .95rem var(--font);cursor:pointer;text-decoration:none}
.nav-item>a:hover,.nav-btn:hover,.nav-btn[aria-expanded="true"]{background:var(--paper);text-decoration:none}
.nav-item>a[aria-current="true"],.nav-btn[aria-current="true"]{box-shadow:inset 0 -2px 0 var(--primary)}
.chev{width:11px;height:11px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .15s}
.nav-btn[aria-expanded="true"] .chev{transform:rotate(180deg)}
.menu{display:none;position:absolute;left:0;right:0;top:calc(var(--header-h) + 3px);background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
.nav-item.open .menu{display:block}
.menu-inner{max-width:var(--wrap);margin:0 auto;padding:26px var(--gutter) 30px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px}
.menu-title{font-size:.74rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.menu-col a,.mm-cols a{display:block;padding:7px 0;color:var(--ink);font-size:.95rem;line-height:1.35}
.menu-col a:hover{color:var(--primary)}
.bar-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
.mobile-menu{background:var(--surface);border-top:1px solid var(--line);max-height:calc(100vh - var(--header-h) - 3px);overflow:auto;padding:12px 0 24px}
.mobile-menu[hidden]{display:none}
.mobile-menu details{border-bottom:1px solid var(--line-2)}
.mobile-menu summary{list-style:none;cursor:pointer;padding:14px 0;font-weight:600;display:flex;justify-content:space-between;align-items:center}
.mobile-menu summary::-webkit-details-marker{display:none}
.mobile-menu summary::after{content:"+";font-weight:400;color:var(--muted);font-size:1.3rem}
.mobile-menu details[open] summary::after{content:"–"}
.mm-cols{padding:0 0 12px}
.mm-cols>div{margin-bottom:12px}
.mm-top{display:block;padding:14px 0;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line-2)}
.mobile-menu .btn{margin-top:18px;width:100%}
@media (max-width:1023px){
  .site-nav{display:none}
  .burger{display:flex}
  .bar-actions .btn{display:none}
  .bar{gap:12px}
}

/* ---------- page head ---------- */
.page-head{padding:44px 0 28px;border-bottom:1px solid var(--line)}
.page-head h1{max-width:22ch}
.crumbs{font-size:.86rem;color:var(--muted);margin-bottom:18px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted)}
.crumbs span[aria-hidden]{opacity:.6}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* ---------- body grid ---------- */
main{min-height:60vh}
.body-grid{display:grid;grid-template-columns:1fr;gap:40px;padding:36px 0 72px}
main.with-toc .body-grid{grid-template-columns:220px minmax(0,1fr)}
.toc{position:sticky;top:calc(var(--header-h) + 24px);align-self:start;font-size:.9rem;border-left:1px solid var(--line);padding-left:14px}
.toc-title{font-size:.74rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.toc a{display:block;padding:5px 0;color:var(--ink-2);line-height:1.35}
.toc a.active{color:var(--primary);font-weight:600}
@media (max-width:1023px){main.with-toc .body-grid{grid-template-columns:1fr}.toc{position:static;border-left:0;padding:0 0 8px;border-bottom:1px solid var(--line)}.toc a{display:inline-block;margin-right:14px}}
.content{max-width:76ch}
.content.wide,.content:has(.cards),.content:has(.tablewrap){max-width:none}
.content>p,.content>ul,.content>ol,.content>.lede{max-width:72ch}
.content ul,.content ol{padding-left:1.3em}
.content li{margin:.3em 0}
.content h2:first-child{margin-top:0}

/* ---------- blocks ---------- */
.tablewrap{margin:1.2em 0 1.8em}
table{width:100%;border-collapse:collapse;font-size:.94rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
caption{text-align:left;font-weight:600;padding:0 0 8px;caption-side:top;color:var(--ink-2)}
th,td{padding:10px 12px;border-top:1px solid var(--line-2);text-align:left;vertical-align:top}
thead th{border-top:0;background:var(--paper);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
tbody th{font-weight:600;white-space:normal}
@media (max-width:699px){
  table,thead,tbody,tr,th,td{display:block}
  thead{position:absolute;left:-9999px}
  tr{border-top:1px solid var(--line);padding:6px 0}
  tr:first-child{border-top:0}
  tbody th{padding:8px 12px 2px;border:0;font-size:1rem}
  td{border:0;padding:4px 12px;display:grid;grid-template-columns:minmax(90px,38%) 1fr;gap:10px}
  td::before{content:attr(data-label);font-size:.78rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding-top:.15em}
}
.defs{margin:1em 0 1.8em;border-top:1px solid var(--line)}
.def{display:grid;grid-template-columns:minmax(140px,28%) 1fr;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}
.def dt{font-weight:600}
.def dd{margin:0;color:var(--ink-2)}
@media (max-width:599px){.def{grid-template-columns:1fr;gap:4px}}
.steps{list-style:none;padding:0;margin:1em 0 1.8em;counter-reset:step}
.steps li{position:relative;padding:0 0 18px 52px;counter-increment:step}
.steps li::before{content:counter(step);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:650;font-size:.95rem}
.steps li::after{content:"";position:absolute;left:16px;top:34px;bottom:0;width:2px;background:var(--line)}
.steps li:last-child::after{display:none}
.steps li strong{display:block;margin-bottom:2px}
.steps li span{color:var(--ink-2)}
.faq{margin:1em 0 1.8em;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:14px 32px 14px 0;font-weight:600;position:relative;list-style:none;line-height:1.4}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:12px;color:var(--muted);font-size:1.3rem;font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq-a{padding:0 0 14px;color:var(--ink-2);max-width:70ch}
.callout{margin:1.4em 0;padding:14px 18px;border-left:3px solid var(--primary);background:var(--surface);border-radius:0 var(--radius) var(--radius) 0}
.callout.warn{border-left-color:var(--accent)}
.callout strong{display:block;margin-bottom:4px}
.callout p{margin:0;color:var(--ink-2)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:1.2em 0 2em}
.cards.cols-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card{display:flex;flex-direction:column;gap:6px;padding:18px 18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);text-decoration:none;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--primary);text-decoration:none;transform:translateY(-1px)}
.card strong{font-size:1.05rem;letter-spacing:-.01em}
.card span{color:var(--ink-2);font-size:.93rem;line-height:1.5}
.card .kicker{font-size:.72rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--primary)}
.cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin:2.4em 0 1em;padding:22px 24px;background:var(--primary-soft);border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0}
.cta strong{font-size:1.15rem;letter-spacing:-.01em}
.cta p{margin:4px 0 0;color:var(--ink-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px}
.refs{font-size:.88rem;color:var(--ink-2);padding-left:1.4em}
.refs li{margin:.4em 0}
figure{margin:1.4em 0 2em}
figcaption{font-size:.88rem;color:var(--muted);margin-top:8px}
.vmap svg{width:100%;height:auto;display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:8px 4px}
.vm-axis{stroke:var(--line);stroke-width:2}
.vm-arrow{fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.vm-label{font:500 12px var(--font);fill:#fff}
.vm-label.small{font-size:10px}
.vm-promoter{fill:var(--m-promoter)}.vm-orf{fill:var(--m-orf)}.vm-tag{fill:var(--m-tag)}.vm-reporter{fill:var(--m-reporter)}.vm-marker{fill:var(--m-marker)}.vm-reg{fill:var(--m-reg)}.vm-ltr,.vm-itr{fill:var(--m-ltr)}.vm-linker{fill:var(--m-linker)}.vm-polya{fill:var(--m-polya)}.vm-misc{fill:var(--m-misc)}

/* module chips (legend / inline) */
.chip{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--line-2);color:var(--ink-2)}
.chip i{width:9px;height:9px;border-radius:2px;background:var(--m-reg)}
.chip.promoter i{background:var(--m-promoter)}.chip.orf i{background:var(--m-orf)}.chip.tag i{background:var(--m-tag)}.chip.reporter i{background:var(--m-reporter)}.chip.marker i{background:var(--m-marker)}.chip.ltr i{background:var(--m-ltr)}

/* ---------- forms ---------- */
.form{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px;max-width:760px;margin:1em 0 2em}
.form .full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:.88rem;font-weight:600}
.field small{color:var(--muted);font-size:.8rem}
input[type=text],input[type=email],input[type=number],select,textarea{width:100%;font:16px/1.4 var(--font);color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:11px 12px;min-height:46px}
textarea{min-height:140px;resize:vertical}
textarea.seq{font:14px/1.5 var(--mono);min-height:120px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:1px;border-color:var(--primary)}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.form-msg{grid-column:1/-1;padding:12px 14px;border-radius:var(--radius);background:var(--primary-soft);color:var(--ink)}
.form-msg.err{background:var(--accent-soft)}

/* ---------- home ---------- */
.hero{padding:56px 0 40px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:44px;align-items:center}
.hero h1{font-size:clamp(2.2rem,1.4rem + 3.2vw,3.5rem);max-width:16ch}
.hero .lede{font-size:1.2rem}
.hero-map{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 16px 14px}
.hero-map .vm-title{font-size:.78rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;display:flex;justify-content:space-between;gap:10px}
.hero-map svg{width:100%;height:auto;display:block}
.hero-map .legend{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
@media (max-width:899px){.hero-grid{grid-template-columns:1fr}.hero{padding:40px 0 32px}}
.section{padding:52px 0;border-bottom:1px solid var(--line)}
.section h2{margin-top:0}
.section-head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:12px;margin-bottom:22px}
.section-head p{margin:0;color:var(--ink-2);max-width:60ch}
.matrix{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:6px}
.matrix a{display:flex;flex-direction:column;gap:6px;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);min-height:120px}
.matrix a:hover{border-color:var(--primary);text-decoration:none}
.matrix strong{font-size:1rem;letter-spacing:-.01em}
.matrix span{font-size:.85rem;color:var(--muted)}
.matrix .bar{display:flex;gap:3px;height:6px;margin-top:auto}
.matrix .bar i{flex:1;border-radius:2px}
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;counter-reset:flow}
.flow div{position:relative;padding:18px 16px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);counter-increment:flow}
.flow div::before{content:"0" counter(flow);font:600 .8rem var(--mono);color:var(--primary);display:block;margin-bottom:8px}
.flow strong{display:block;margin-bottom:4px}
.flow p{margin:0;font-size:.92rem;color:var(--ink-2)}
.principles{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.principles div{border-top:2px solid var(--primary);padding-top:14px}
.principles strong{display:block;margin-bottom:6px;font-size:1.05rem}
.principles p{margin:0;color:var(--ink-2);font-size:.95rem}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--surface);padding:48px 0 28px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px}
.foot-brand p{color:var(--muted);font-size:.92rem;max-width:30ch;margin-top:12px}
.foot-title{font-size:.74rem;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.foot-col a{display:block;padding:5px 0;color:var(--ink-2);font-size:.93rem}
.foot-col a:hover{color:var(--primary)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line-2);font-size:.84rem;color:var(--muted)}
@media (max-width:899px){.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
@media (max-width:479px){.foot-grid{grid-template-columns:1fr}}

/* ---------- tools ---------- */
.tool{display:grid;gap:14px;margin:1em 0 2em;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.tool .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.tool .actions{display:flex;flex-wrap:wrap;gap:10px}
.result{padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);font-size:.95rem}
.result.mono{font:14px/1.6 var(--mono);white-space:pre-wrap;word-break:break-all}
.result dl{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;margin:0}
.result dt{color:var(--muted)}
.result dd{margin:0;font-weight:600}
.codon-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;font-size:.84rem}
.codon-grid div{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:8px}
.codon-grid b{font-family:var(--mono);font-weight:500}
@media (max-width:699px){.codon-grid{grid-template-columns:repeat(2,1fr)}}

/* ---------- builder ---------- */
.builder{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px;align-items:start;margin:8px 0 40px}
@media (max-width:1023px){.builder{grid-template-columns:1fr}}
.stepper{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 18px;padding:0;list-style:none}
.stepper li{font-size:.82rem;font-weight:600;padding:6px 10px;border-radius:999px;background:var(--line-2);color:var(--muted)}
.stepper li.done{background:var(--primary-soft);color:var(--primary)}
.stepper li.current{background:var(--primary);color:#fff}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.panel h2{margin-top:0;font-size:1.3rem}
.choices{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;margin:14px 0}
.choice{display:block;position:relative;padding:14px 14px 14px 40px;border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;background:var(--paper)}
.choice input{position:absolute;left:14px;top:17px;margin:0;width:16px;height:16px;accent-color:var(--primary)}
.choice strong{display:block;font-size:.98rem}
.choice span{display:block;font-size:.85rem;color:var(--muted);margin-top:2px}
.choice:has(input:checked){border-color:var(--primary);background:var(--primary-soft)}
.choice.disabled{opacity:.45;cursor:not-allowed}
.panel-actions{display:flex;justify-content:space-between;gap:10px;margin-top:18px}
.summary{position:sticky;top:calc(var(--header-h) + 24px)}
.summary .panel{padding:18px}
.summary h3{margin:0 0 10px;font-size:1rem}
.spec{list-style:none;margin:0 0 12px;padding:0;font-size:.9rem}
.spec li{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-top:1px solid var(--line-2)}
.spec li span:first-child{color:var(--muted)}
.spec li span:last-child{text-align:right;font-weight:600;max-width:60%}
.summary .vmap{margin:0 0 12px}
.summary .vmap svg{padding:6px 2px}
.summary .note{font-size:.82rem;color:var(--muted);margin:10px 0 0}

/* ---------- brand page ---------- */
.logo-sheet{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin:1em 0 2em}
.logo-sheet figure{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.logo-sheet .tile{display:flex;align-items:center;justify-content:center;min-height:170px;background:var(--paper);border-radius:var(--radius)}
.logo-sheet .tile.dark{background:#152420}
.logo-sheet .tile svg{width:70%;max-width:360px;height:auto}
.logo-sheet .tile.mark svg{width:96px}
.swatches{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin:1em 0 2em}
.swatches div{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.8rem}
.swatches i{display:block;height:56px}
.swatches span{display:block;padding:8px 10px;font-family:var(--mono)}

/* ---------- utilities ---------- */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (hover:hover){.card:hover,.matrix a:hover{border-color:var(--primary)}}
@media print{.site-header,.site-footer,.cta,.toc{display:none}}