:root{
  --paper:#F3F6F8; --surface:#FFFFFF; --metal:#E6EBEF; --ink:#12171C; --muted:#56626D;
  --line:#D2D9DF; --accent:#2445C4; --accent-soft:#E3E8FB; --on-accent:#FFFFFF; --ok:#1F7A4D;
  --display:"Archivo","Arial Narrow",Arial,sans-serif;
  --body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --wrap:1160px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0E1215; --surface:#151A1F; --metal:#1B2228; --ink:#E5EAEE; --muted:#95A2AD;
  --line:#2A333B; --accent:#7D95FF; --accent-soft:#1D2547; --on-accent:#0B0F1A; --ok:#5BC48E; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0E1215; --surface:#151A1F; --metal:#1B2228; --ink:#E5EAEE; --muted:#95A2AD;
  --line:#2A333B; --accent:#7D95FF; --accent-soft:#1D2547; --on-accent:#0B0F1A; --ok:#5BC48E; color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--paper);color:var(--ink);font:400 16px/1.6 var(--body);padding-inline:20px}
a{color:var(--accent)}
.wrap{max-width:var(--wrap);margin-inline:auto}
h1,h2,h3{font-family:var(--display);font-stretch:112%;text-wrap:balance;margin:0;line-height:1.08}
h2{font-size:clamp(28px,4vw,40px);font-weight:800}
h3{font-size:19px;font-weight:600}
p{margin:0}
.label{font:500 12px/1.2 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
section{padding-block:72px;border-top:1px solid var(--line)}
.sec-head{display:grid;gap:12px;max-width:640px;margin-bottom:36px}
.sec-head p{color:var(--muted)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* header */
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:var(--paper);border-bottom:1px solid var(--line);margin-inline:-20px;padding-inline:20px}
.nav{display:flex;align-items:center;gap:24px;min-height:64px}
.logo{font:800 22px/1 var(--display);font-stretch:112%;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.logo svg{width:26px;height:26px}
.nav ul{display:flex;gap:22px;list-style:none;margin:0 0 0 auto;padding:0}
.nav ul a{color:var(--ink);text-decoration:none;font-weight:500;font-size:15px}
.nav ul a:hover{color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px/1 var(--body);padding:13px 20px;border-radius:6px;border:1px solid var(--accent);background:var(--accent);color:var(--on-accent);text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--accent)}
@media (max-width:860px){.nav ul{display:none}.nav .btn{margin-left:auto}}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;padding-block:56px 64px;align-items:start}
.hero > *{min-width:0}
.hero h1{font-size:clamp(36px,5.6vw,62px);font-weight:800;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .lede{font-size:18px;color:var(--muted);max-width:52ch;margin-top:20px}
.specs{display:grid;grid-template-columns:repeat(4,1fr);margin-top:32px;border:1px solid var(--ink);background:var(--surface)}
.specs div{padding:14px 14px 12px;border-right:1px solid var(--ink);display:grid;gap:6px}
.specs div:last-child{border-right:0}
.specs b{font:600 22px/1 var(--mono);font-variant-numeric:tabular-nums}
.drawing{margin-top:32px;color:var(--ink)}
.drawing svg{width:100%;height:auto;display:block}
@media (max-width:960px){.hero{grid-template-columns:1fr}}
@media (max-width:520px){.specs{grid-template-columns:1fr 1fr}.specs div:nth-child(2){border-right:0}.specs div:nth-child(-n+2){border-bottom:1px solid var(--ink)}}

/* quote form */
.quote{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:28px;box-shadow:0 1px 0 var(--line),0 18px 40px -28px rgba(18,23,28,.35)}
.quote h2{font-size:26px}
.quote .sub{color:var(--muted);margin-top:6px;font-size:15px}
form{display:grid;gap:16px;margin-top:20px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.row > *{min-width:0}
@media (max-width:520px){.row{grid-template-columns:1fr}}
.field{display:grid;gap:6px}
.field label{font-weight:600;font-size:14px}
input[type=text],input[type=email],input[type=number],select,textarea{width:100%;font:400 15px/1.4 var(--body);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:11px 12px}
textarea{min-height:84px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.drop{border:1.5px dashed var(--muted);border-radius:8px;padding:22px;text-align:center;background:var(--paper);cursor:pointer;display:grid;gap:6px;justify-items:center}
.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop strong{font-size:15px}
.drop small{color:var(--muted);font-family:var(--mono);font-size:12px}
.files{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.files li{display:flex;justify-content:space-between;gap:10px;font:400 13px/1.3 var(--mono);background:var(--metal);padding:8px 10px;border-radius:5px}
.files li span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.files li.bad{color:#B3261E}
.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--muted)}
.check input{margin-top:3px;accent-color:var(--accent)}
.err{color:#C0352B;font-size:14px}
.done{display:grid;gap:12px;padding:8px 0}
.done .tick{width:44px;height:44px;border-radius:50%;background:var(--ok);color:var(--surface);display:grid;place-items:center;font-size:22px}
.done ul{margin:0;padding-left:18px;color:var(--muted)}

/* processes */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.grid3 > div{background:var(--surface);padding:24px;display:grid;gap:10px;align-content:start;min-width:0}
.grid3 p{color:var(--muted);font-size:15px}
.grid3 .tag{font:500 12px/1.3 var(--mono);color:var(--accent)}
@media (max-width:900px){.grid3{grid-template-columns:1fr 1fr}}
@media (max-width:580px){.grid3{grid-template-columns:1fr}}

/* materials */
.mat{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.mat > div{min-width:0}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
th{font:500 12px/1.2 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--metal)}
td:first-child{font-weight:600;white-space:nowrap}
td.g{font-family:var(--mono);font-size:13px;color:var(--muted)}
.mat h3{margin-bottom:14px}
@media (max-width:860px){.mat{grid-template-columns:1fr}}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:20px;counter-reset:s}
.steps li{counter-increment:s;display:grid;gap:8px;align-content:start;border-top:2px solid var(--ink);padding-top:14px;min-width:0}
.steps li::before{content:counter(s,decimal-leading-zero);font:500 13px var(--mono);color:var(--accent)}
.steps p{color:var(--muted);font-size:15px}
.steps .t{font:500 12px var(--mono);color:var(--ink);background:var(--metal);padding:3px 7px;border-radius:4px;justify-self:start}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* quality */
.q{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.q > *{min-width:0}
.ql{list-style:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid var(--line)}
.ql li{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.ql li b{font-weight:600}
.ql li span{color:var(--muted)}
.photos{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ph{aspect-ratio:4/3;max-width:100%;border:1px dashed var(--muted);border-radius:6px;background:repeating-linear-gradient(135deg,var(--metal) 0 10px,var(--surface) 10px 20px);display:grid;place-items:center;text-align:center;padding:12px;font:500 12px/1.4 var(--mono);color:var(--muted)}
@media (max-width:860px){.q{grid-template-columns:1fr}.ql li{grid-template-columns:1fr;gap:2px}}

/* trust */
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.trust > div{display:grid;gap:10px;align-content:start;min-width:0}
.trust p{color:var(--muted);font-size:15px}
@media (max-width:860px){.trust{grid-template-columns:1fr}}

/* faq */
.faq{display:grid;gap:0;border-top:1px solid var(--line);max-width:820px}
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::after{content:"+";font:500 20px/1 var(--mono);color:var(--accent)}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin-top:10px;max-width:68ch}

/* cta + footer */
.cta{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px}
.cta h2{max-width:20ch}
footer{border-top:1px solid var(--ink);padding-block:28px 40px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;font-size:14px;color:var(--muted)}
footer > div{display:grid;gap:8px;align-content:start;min-width:0}
footer .copy{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
footer button{font:500 12px var(--mono);border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:4px;padding:4px 8px;cursor:pointer}
@media (max-width:760px){footer{grid-template-columns:1fr}}
@media (prefers-reduced-motion:no-preference){.btn,.drop{transition:filter .15s,background .15s,border-color .15s}}

html,body{margin:0}img{max-width:100%}[hidden]{display:none!important}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ===== multi-page additions ===== */
.logo{color:var(--ink)}
.nav ul a[aria-current]{color:var(--accent)}
.menu{display:none;margin-left:auto}
.menu summary{list-style:none;cursor:pointer;font:600 15px/1 var(--body);padding:12px 4px}
.menu summary::-webkit-details-marker{display:none}
.menu summary::after{content:none}
.menu[open] .menu-panel{display:grid}
.menu-panel{display:none;position:absolute;left:0;right:0;top:64px;background:var(--surface);border-bottom:1px solid var(--line);padding:12px 20px 20px;gap:2px;box-shadow:0 18px 30px -24px rgba(18,23,28,.4)}
.menu-panel a{color:var(--ink);text-decoration:none;font-weight:500;padding:10px 0;border-bottom:1px solid var(--line)}
.menu-panel a:last-child{border-bottom:0}
@media (max-width:860px){.menu{display:block}.nav .btn{margin-left:0}}

.crumbs{font:500 12px/1.4 var(--mono);color:var(--muted);padding-top:28px;display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent)}
.page-hero{padding-block:24px 48px;display:grid;gap:16px;max-width:820px}
.page-hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;letter-spacing:-.01em}
.page-hero .lede{font-size:18px;color:var(--muted);max-width:62ch}
.page-hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--ink);background:var(--surface);margin-top:8px}
.facts div{padding:14px;border-right:1px solid var(--ink);display:grid;gap:6px;min-width:0}
.facts div:last-child{border-right:0}
.facts b{font:600 19px/1.1 var(--mono)}
@media (max-width:620px){.facts{grid-template-columns:1fr 1fr}.facts div:nth-child(2){border-right:0}.facts div:nth-child(-n+2){border-bottom:1px solid var(--ink)}}

.prose{max-width:760px}
.prose h2{font-size:clamp(24px,3.2vw,32px);margin:44px 0 14px}
.prose h3{margin:28px 0 10px}
.prose p,.prose li{color:var(--ink);font-size:16.5px}
.prose p+p{margin-top:14px}
.prose ul,.prose ol{padding-left:22px;margin:12px 0;display:grid;gap:6px}
.prose .tbl{margin:18px 0}
.prose blockquote,.callout{margin:22px 0;padding:16px 18px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 6px 6px 0}
.prose code{font:400 14px var(--mono);background:var(--metal);padding:1px 5px;border-radius:4px}
.split{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.aside{position:sticky;top:88px;display:grid;gap:16px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;display:grid;gap:10px}
.box h3{font-size:17px}
.box p{color:var(--muted);font-size:14.5px}
.box ul{list-style:none;margin:0;padding:0;display:grid;gap:8px;font-size:14.5px}
.split > *{min-width:0}
@media (max-width:960px){.split{grid-template-columns:minmax(0,1fr)}.aside{position:static}}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cards a{display:grid;gap:8px;align-content:start;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;text-decoration:none;color:var(--ink);min-width:0}
.cards a:hover{border-color:var(--accent)}
.cards a p{color:var(--muted);font-size:14.5px}
.cards .tag{font:500 12px/1.3 var(--mono);color:var(--accent)}
@media (max-width:900px){.cards{grid-template-columns:1fr 1fr}}
@media (max-width:580px){.cards{grid-template-columns:1fr}}

footer{grid-template-columns:1.6fr 1fr 1fr 1fr}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--accent)}
@media (max-width:860px){footer{grid-template-columns:1fr 1fr}}
@media (max-width:520px){footer{grid-template-columns:1fr}}
.foot-bar{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:13px}
.grid3 h3 a{color:inherit;text-decoration:none}
.grid3 h3 a::after{content:" →";color:var(--accent)}
.grid3 h3 a:hover{color:var(--accent)}
td a{color:inherit}