/* Document Engineering & Compliance — black / white / burgundy
   Type: Apple system stack. SF Pro renders on Apple devices; other systems fall back. */
:root{
  --black:#000;
  --ink:#1d1d1f;
  --paper:#fff;
  --mist:#f5f5f7;
  --line:#d2d2d7;
  --muted:#6e6e73;
  --muted-dark:#a1a1a6;
  --burgundy:#6e0f1f;
  --burgundy-deep:#4d0914;
  --burgundy-lit:#d2455f;   /* burgundy readable on black */
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","Segoe UI",Roboto,"Helvetica",Arial,sans-serif;
  --nav-h:52px;
  --gutter:clamp(20px,5vw,48px);
  --max:1120px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{margin:0;font-family:var(--font);font-size:17px;line-height:1.47;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--burgundy-lit);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:10px 14px;border-radius:8px;z-index:200}
.skip:focus{left:8px}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}

/* ---------- Navigation ---------- */
.nav{position:fixed;inset:0 0 auto 0;height:var(--nav-h);z-index:100;color:#f5f5f7}
.nav::before{content:"";position:absolute;inset:0;z-index:-1;background:rgba(0,0,0,.78);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px)}
.nav .wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;font-size:15px;letter-spacing:-.01em;white-space:nowrap}
.brand i{width:12px;height:12px;background:var(--burgundy-lit);border-radius:3px;display:block}
.nav-links{display:flex;align-items:center;gap:30px;font-size:13px}
.nav-links a{text-decoration:none;color:#d2d2d7;transition:color .2s}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:#fff}
.btn-contact{font:inherit;font-size:13px;color:#fff;background:transparent;border:1px solid rgba(255,255,255,.3);padding:6px 16px;border-radius:999px;cursor:pointer;transition:background .2s,border-color .2s}
.btn-contact:hover{background:var(--burgundy);border-color:var(--burgundy)}
.menu-btn{display:none;width:44px;height:44px;margin-right:-10px;background:none;border:0;color:#fff;cursor:pointer}
.menu-btn span{display:block;width:18px;height:1.5px;background:currentColor;margin:5px auto;transition:transform .25s var(--ease),opacity .2s}
.menu-open .menu-btn span:nth-child(1){transform:translateY(3.25px) rotate(45deg)}
.menu-open .menu-btn span:nth-child(2){transform:translateY(-3.25px) rotate(-45deg)}

@media (max-width:760px){
  .menu-btn{display:block}
  .nav-links{position:fixed;inset:var(--nav-h) 0 0 0;background:#000;flex-direction:column;align-items:flex-start;gap:0;padding:12px var(--gutter) 40px;font-size:28px;font-weight:600;letter-spacing:-.02em;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
  .menu-open .nav-links{opacity:1;visibility:visible}
  .nav-links a,.nav-links .btn-contact{width:100%;text-align:left;padding:16px 0;border-bottom:1px solid #1d1d1f;color:#f5f5f7}
  .nav-links .btn-contact{font-size:28px;font-weight:600;letter-spacing:-.02em;border:0;border-bottom:1px solid #1d1d1f;border-radius:0;color:var(--burgundy-lit)}
  .nav-links .btn-contact:hover{background:none}
}

/* ---------- Sections ---------- */
.sec{padding:clamp(72px,11vw,150px) 0}
.sec.dark{background:var(--black);color:#f5f5f7}
.sec.mist{background:var(--mist)}
.sec.wine{background:var(--burgundy);color:#fff}
h1,h2,h3{font-weight:600;letter-spacing:-.022em;line-height:1.08}
h2{font-size:clamp(2rem,4.6vw,3.5rem);max-width:18ch}
h3{font-size:1.3rem;line-height:1.2}
.lead{font-size:clamp(1.15rem,2vw,1.4rem);line-height:1.4;color:var(--muted);max-width:40ch;letter-spacing:-.011em}
.dark .lead{color:var(--muted-dark)}
.sec-head{margin-bottom:clamp(40px,6vw,80px)}
.sec-head .lead{margin-top:20px}

/* ---------- Buttons ---------- */
.btns{display:flex;flex-wrap:wrap;gap:12px 14px;align-items:center;margin-top:36px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 24px;border-radius:999px;font:inherit;font-size:16px;font-weight:500;text-decoration:none;cursor:pointer;border:1px solid transparent;transition:background .2s,color .2s,border-color .2s,transform .2s var(--ease)}
.btn:active{transform:scale(.98)}
.btn-wine{background:var(--burgundy);color:#fff}
.btn-wine:hover{background:#8a1329}
.btn-ghost{background:transparent;color:inherit;border-color:rgba(128,128,128,.55)}
.btn-ghost:hover{border-color:currentColor}
.btn-white{background:#fff;color:var(--burgundy)}
.btn-white:hover{background:#f5f5f7}
.link{color:var(--burgundy);text-decoration:none;font-weight:500}
.dark .link{color:var(--burgundy-lit)}
.link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--black);color:#f5f5f7;padding:calc(var(--nav-h) + clamp(56px,9vw,120px)) 0 clamp(64px,9vw,120px);overflow:hidden}
.hero::before{content:"";position:absolute;width:900px;height:900px;right:-260px;top:-60px;background:radial-gradient(closest-side,rgba(110,15,31,.55),rgba(110,15,31,0));pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,80px);align-items:center}
.hero h1{font-size:clamp(2.5rem,6.2vw,5rem);font-weight:700;letter-spacing:-.035em;line-height:1.02;max-width:12ch}
.hero .lead{margin-top:26px;max-width:34ch}
.stack{position:relative;aspect-ratio:1/1.12;width:100%;max-width:520px;margin-left:auto}
.stack img{position:absolute;width:62%;border-radius:4px;box-shadow:0 40px 80px -20px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.08)}
.stack .a{left:0;bottom:0;transform:rotate(-4deg)}
.stack .b{right:0;top:0;transform:rotate(3.5deg)}
.hero-rise .stack img{animation:rise 1.1s var(--ease) both}
.hero-rise .stack .b{animation-delay:.12s}
@keyframes rise{from{opacity:0;transform:translateY(36px) rotate(0)}}
@media (max-width:860px){
  .hero .wrap{grid-template-columns:1fr}
  .stack{max-width:420px;margin:12px auto 0}
}

/* ---------- Services list ---------- */
.rows{border-top:1px solid var(--line)}
.row{display:grid;grid-template-columns:1fr 1fr 40px;gap:24px 40px;align-items:center;padding:clamp(24px,3.5vw,40px) 0;border-bottom:1px solid var(--line);text-decoration:none;transition:padding .3s var(--ease)}
.row h3{font-size:clamp(1.4rem,2.6vw,2.1rem);letter-spacing:-.025em;transition:color .2s}
.row p{color:var(--muted);max-width:44ch}
.row .chev{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;transition:background .2s,border-color .2s,color .2s}
.row:hover h3{color:var(--burgundy)}
.row:hover .chev{background:var(--burgundy);border-color:var(--burgundy);color:#fff}
.row svg{width:14px;height:14px}
@media (max-width:760px){
  .row{grid-template-columns:1fr 36px}
  .row p{grid-column:1/2;grid-row:2}
  .row .chev{grid-row:1/3;grid-column:2}
}

/* ---------- Samples ---------- */
.docs{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px)}
.doc{display:flex;flex-direction:column}
.doc-img{display:block;background:#111;border-radius:14px;padding:clamp(20px,4vw,48px) clamp(20px,4vw,48px) 0;overflow:hidden;height:clamp(300px,42vw,480px);transition:background .3s}
.doc-img img{width:100%;border-radius:3px 3px 0 0;box-shadow:0 30px 60px -20px rgba(0,0,0,.8);transition:transform .5s var(--ease)}
.doc-img:hover img{transform:translateY(-8px)}
.doc h3{margin-top:28px;font-size:1.6rem;letter-spacing:-.025em}
.doc p{color:var(--muted-dark);margin-top:8px;max-width:42ch}
.doc .meta{font-size:14px;margin-top:12px;color:#86868b}
.doc .btns{margin-top:20px}
@media (max-width:860px){.docs{grid-template-columns:1fr}}

/* ---------- Process (a real sequence) ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.steps li{counter-increment:s;padding:28px 28px 0 0}
.steps li::before{content:counter(s);display:block;font-size:14px;font-weight:600;color:var(--burgundy);margin-bottom:18px}
.steps h3{font-size:1.25rem;margin-bottom:10px}
.steps p{color:var(--muted);font-size:16px;max-width:30ch}
@media (max-width:860px){.steps{grid-template-columns:1fr 1fr;row-gap:24px}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* ---------- Principles ---------- */
.pairs{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(32px,5vw,64px) clamp(32px,6vw,96px)}
.pairs h3{margin-bottom:10px}
.pairs p{color:var(--muted);max-width:42ch}
@media (max-width:760px){.pairs{grid-template-columns:1fr}}

/* ---------- Standards ---------- */
.stds{display:flex;flex-wrap:wrap;gap:10px}
.stds li{font-size:15px;padding:8px 16px;border-radius:999px;border:1px solid #2c2c2e;color:#d2d2d7}

/* ---------- CTA ---------- */
.cta{text-align:center}
.cta h2{margin:0 auto;max-width:16ch}
.cta p{margin:20px auto 0;color:rgba(255,255,255,.78);max-width:36ch;font-size:1.2rem}
.cta .btns{justify-content:center}

/* ---------- Service / sample pages ---------- */
.page-hero{background:var(--black);color:#f5f5f7;padding:calc(var(--nav-h) + clamp(56px,8vw,110px)) 0 clamp(56px,8vw,100px);position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;width:700px;height:700px;right:-240px;top:-200px;background:radial-gradient(closest-side,rgba(110,15,31,.5),rgba(110,15,31,0));pointer-events:none}
.page-hero .wrap{position:relative}
.crumbs{font-size:14px;color:var(--muted-dark);margin-bottom:28px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:#fff}
.page-hero h1{font-size:clamp(2.2rem,5.4vw,4.2rem);font-weight:700;letter-spacing:-.032em;line-height:1.04;max-width:16ch}
.page-hero .lead{margin-top:24px;max-width:46ch}
.cols{display:grid;grid-template-columns:1fr 1.5fr;gap:clamp(24px,6vw,96px);padding:clamp(40px,5vw,64px) 0;border-top:1px solid var(--line)}
.cols:first-child{border-top:0;padding-top:0}
.cols h2{font-size:clamp(1.5rem,2.6vw,2rem);max-width:none}
.ticks li{position:relative;padding:12px 0 12px 28px;border-bottom:1px solid var(--line)}
.ticks li:first-child{padding-top:0}
.ticks li::before{content:"";position:absolute;left:0;top:19px;width:10px;height:10px;border-radius:50%;background:var(--burgundy)}
.ticks li:first-child::before{top:7px}
.ticks li:last-child{border-bottom:0}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:600;font-size:1.1rem;letter-spacing:-.012em;list-style:none;display:flex;justify-content:space-between;gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--burgundy);font-weight:400;font-size:1.5rem;line-height:1;transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin-top:12px;color:var(--muted);max-width:60ch}
@media (max-width:760px){.cols{grid-template-columns:1fr}}
.pagelist{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pagelist img{border-radius:6px;box-shadow:0 0 0 1px var(--line)}
@media (max-width:760px){.pagelist{grid-template-columns:1fr}}

/* ---------- Footer ---------- */
.foot{background:var(--black);color:#a1a1a6;font-size:14px;padding:56px 0 40px}
.foot .grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot h4{margin:0 0 12px;color:#f5f5f7;font-size:14px;font-weight:600}
.foot a{text-decoration:none;display:block;padding:4px 0}
.foot a:hover{color:#fff}
.foot .small{margin-top:40px;padding-top:20px;border-top:1px solid #1d1d1f;max-width:70ch}
.foot .brand{margin-bottom:12px;color:#f5f5f7}
@media (max-width:760px){.foot .grid{grid-template-columns:1fr}}

/* ---------- Contact dialog ---------- */
dialog.contact{border:0;padding:0;background:#111;color:#f5f5f7;width:min(520px,calc(100vw - 32px));border-radius:22px;box-shadow:0 40px 120px rgba(0,0,0,.7),0 0 0 1px rgba(255,255,255,.08)}
dialog.contact::backdrop{background:rgba(0,0,0,.6);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
dialog.contact[open]{animation:pop .3s var(--ease)}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}}
.contact-in{padding:34px 30px 30px}
.contact h2{font-size:1.9rem;max-width:none;letter-spacing:-.028em}
.contact .what{color:var(--muted-dark);margin-top:10px;font-size:16px}
.contact .mail{display:block;margin-top:26px;padding:16px 18px;border-radius:14px;background:#1c1c1e;font-size:clamp(1rem,4.4vw,1.2rem);font-weight:600;letter-spacing:-.01em;word-break:break-all;text-decoration:none}
.contact .mail:hover{background:#242427}
.contact .btns{margin-top:18px}
.contact .btn{min-height:44px;font-size:15px}
.contact .note{margin-top:18px;font-size:13px;color:#86868b}
.contact .x{position:absolute;right:12px;top:12px;width:40px;height:40px;border-radius:50%;border:0;background:#1c1c1e;color:#d2d2d7;font-size:20px;cursor:pointer;line-height:1}
.contact .x:hover{background:#2c2c2e;color:#fff}
.contact .live{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (max-width:560px){
  dialog.contact{margin:auto auto 0;width:100%;max-width:none;border-radius:22px 22px 0 0}
  .contact-in{padding-bottom:max(30px,env(safe-area-inset-bottom))}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
.foot a.brand{display:flex}