/* Optical Bonding Pro — design tokens
   Premium dark tech direction: deep navy surfaces, white text, cyan accent used
   only for interactive/technological emphasis, never as a flat wash. */
@font-face{
  font-family:'Inter';
  font-style:normal;
  font-weight:400 700;
  font-display:swap;
  src:url('../fonts/inter-variable.woff2') format('woff2');
}
:root{
  --paper:#071426;
  --paper-raised:#10233D;
  --ink:#FFFFFF;
  --ink-soft:#132B49;
  --slate:#AAB8C8;
  --slate-on-dark:#AAB8C8;
  --line:rgba(255,255,255,.10);
  --line-on-dark:rgba(255,255,255,.10);
  --verdigris:#00D4FF;
  --verdigris-bright:#00E5FF;
  --on-accent:#071426;
  --container:1440px;
  --serif:'Iowan Old Style','Palatino Linotype',Palatino,Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --sp-3xs:4px;--sp-2xs:8px;--sp-xs:12px;--sp-sm:20px;--sp-md:32px;--sp-lg:48px;--sp-xl:72px;--sp-2xl:104px;--sp-3xl:140px;
  --ease:cubic-bezier(.22,.9,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
button,a,input,textarea,summary{touch-action:manipulation}
button{cursor:pointer;background:none;border:none}
::selection{background:var(--verdigris);color:var(--on-accent)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--verdigris);outline-offset:3px}
.container{max-width:var(--container);width:calc(100% - 64px);margin:auto}
.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--verdigris);color:var(--on-accent);padding:12px 24px;font-weight:600}
.skip-link:focus{top:16px}

/* Header */
.site-header{position:sticky;top:0;z-index:30;background:rgba(7,20,38,.82);backdrop-filter:blur(14px) saturate(1.1);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:88px;gap:24px}
.brand{display:inline-flex;align-items:baseline;gap:9px;font-family:var(--sans);font-size:19px;font-weight:700;letter-spacing:.2px;line-height:1;white-space:nowrap;color:var(--ink)}
.brand-pro{font-family:var(--sans);font-size:10px;font-weight:700;letter-spacing:2.5px;color:var(--verdigris);align-self:center}
.brand-logo{display:block;width:auto;height:40px;flex-shrink:0}
.menu-toggle{display:none}
nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:500}
summary{cursor:pointer;list-style:none}
summary::-webkit-details-marker{display:none}
.nav-group{position:relative}
.nav-group>summary{display:flex;align-items:center;gap:6px}
.nav-group>summary:after{content:'';width:6px;height:6px;border-right:1.5px solid var(--slate);border-bottom:1.5px solid var(--slate);transform:rotate(45deg) translateY(-2px);transition:transform .2s var(--ease)}
.nav-group[open]>summary:after{transform:rotate(225deg) translateY(2px)}
.nav-group>summary,nav>a:not(.nav-cta)>a,nav>a{position:relative}
nav>a:not(.nav-cta){padding:4px 0}
nav>a:not(.nav-cta):after{content:'';position:absolute;left:0;right:100%;bottom:-2px;height:1.5px;background:var(--verdigris);transition:right .25s var(--ease)}
nav>a:not(.nav-cta):hover:after{right:0}
.nav-panel{position:absolute;left:-22px;top:40px;width:300px;background:var(--paper-raised);border:1px solid var(--line);box-shadow:0 24px 48px -12px rgba(0,0,0,.45);padding:10px;display:grid}
.nav-panel a{padding:11px 12px;font-size:14px;line-height:1.45;border-left:2px solid transparent;transition:border-color .18s,color .18s}
.nav-panel a:hover{border-left-color:var(--verdigris);color:var(--verdigris)}
.nav-cta{border:1px solid var(--verdigris);padding:11px 20px;font-weight:600;color:var(--verdigris);transition:background .2s,color .2s}
.nav-cta:hover{background:var(--verdigris);color:var(--on-accent)}

/* Buttons & links */
.button{display:inline-flex;align-items:center;gap:10px;min-height:50px;padding:0 22px;border:1px solid transparent;font-size:14px;font-weight:600;line-height:1;white-space:nowrap}
.button-primary{background:var(--verdigris);color:var(--on-accent)}
.button-primary::after{content:'→';transition:transform .25s var(--ease)}
.button-primary:hover{background:var(--verdigris-bright)}
.button-primary:hover::after{transform:translateX(4px)}
.button-secondary{background:transparent;border-color:var(--ink);color:var(--ink)}
.button-secondary:hover{border-color:var(--verdigris);color:var(--verdigris)}
.text-link{font-size:14px;font-weight:600;border-bottom:1px solid var(--line);padding-bottom:2px;display:inline-flex;align-items:center;gap:8px}
.text-link::after{content:'↓';color:var(--verdigris);transition:transform .2s var(--ease)}
.text-link:hover::after{transform:translateY(3px)}

/* Hero */
.hero{background:var(--paper-raised);color:var(--ink);padding:var(--sp-xl) 0 0;overflow:hidden}
.hero-home{padding-top:var(--sp-2xl)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:start;padding-bottom:var(--sp-xl)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.2px;color:var(--verdigris-bright);margin-bottom:22px;padding-left:14px;border-left:2px solid var(--verdigris-bright)}
h1{font-family:var(--sans);font-weight:800;font-size:clamp(34px,4vw,58px);line-height:1.06;letter-spacing:-.02em;max-width:620px;color:inherit}
h2{font-family:var(--sans);font-weight:800;font-size:clamp(26px,2.6vw,39px);line-height:1.14;letter-spacing:-.01em}
h3{font-family:var(--sans);font-weight:700;font-size:19px;line-height:1.3;letter-spacing:-.005em}
.hero-intro{font-size:17px;color:var(--slate);margin-top:24px;max-width:48ch;line-height:1.7}
.button-row{display:flex;flex-wrap:wrap;align-items:center;gap:28px;margin-top:34px}
.hero .text-link{color:var(--ink);border-bottom-color:var(--line)}
.hero-image{position:relative}
.hero-image img{display:block;width:100%;height:440px;object-fit:cover}
.hero-image figcaption{position:absolute;top:16px;left:16px;display:flex;gap:10px;font-size:11px;font-weight:600;letter-spacing:.3px;color:var(--ink);background:rgba(7,20,38,.6);backdrop-filter:blur(6px);padding:8px 14px}
.hero-image figcaption span:first-child{color:var(--verdigris-bright)}
.hero-plate{display:grid;grid-template-columns:1fr 1fr 1fr;background:var(--ink-soft);border:1px solid var(--line);position:relative}
.hero-plate:before,.hero-plate:after{content:'';position:absolute;top:9px;width:5px;height:5px;border-radius:50%;background:var(--line)}
.hero-plate:before{left:9px}
.hero-plate:after{right:9px}
.hero-plate span{padding:18px 16px 16px;font-size:10.5px;font-weight:700;letter-spacing:1.1px;text-transform:uppercase;color:var(--slate);border-left:1px solid var(--line)}
.hero-plate span:first-child{border-left:none;color:var(--ink)}
.scope-note{font-size:12px;color:var(--slate);padding-bottom:var(--sp-md)}

/* Sections */
.section{padding:var(--sp-3xl) 0;border-top:1px solid var(--line)}
.hero+.section{border-top:none}
.section-heading{max-width:760px;margin-bottom:var(--sp-lg)}
.section-heading .eyebrow{color:var(--verdigris);border-left-color:var(--verdigris)}
.section-heading p{font-size:17px;color:var(--slate);margin-top:20px;max-width:62ch;line-height:1.7}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:var(--sp-lg);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.card{background:var(--paper);padding:var(--sp-md) var(--sp-sm) var(--sp-lg);position:relative;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.card:before{content:'';position:absolute;top:-1px;left:0;width:0;height:2px;background:var(--verdigris);transition:width .3s var(--ease)}
.card:hover:before{width:100%}
.card h3{margin-bottom:14px}
.card p{font-size:15px;color:var(--slate);margin-top:0;line-height:1.7}
.card__link{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--verdigris);margin-top:20px}
.card__link::after{content:'';width:14px;height:1.5px;background:var(--verdigris);transition:width .2s var(--ease)}
.card__link:hover::after{width:22px}

/* Checklist */
.section-soft{background:var(--paper-raised)}
.checklist-layout,.faq-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:80px}
.checklist-layout>div>p{color:var(--slate);max-width:460px;margin-top:22px;line-height:1.7}
.checklist{margin:0;padding:0;list-style:none;counter-reset:item}
.checklist li{counter-increment:item;padding:22px 0 22px 44px;border-bottom:1px solid var(--line);font-size:16px;position:relative;line-height:1.5}
.checklist li:first-child{border-top:1px solid var(--line)}
.checklist li:before{content:counter(item,decimal-leading-zero);position:absolute;left:0;top:22px;color:var(--verdigris);font-size:12px;font-weight:700;letter-spacing:.5px}

/* FAQ */
.faq-list details{border-top:1px solid var(--line);padding:22px 0}
.faq-list details:last-child{border-bottom:1px solid var(--line)}
.faq-list summary{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;padding-right:34px;font-size:17px;font-weight:600}
.faq-list summary::after{content:'';position:absolute;top:50%;right:8px;width:14px;height:14px;transform:translateY(-50%);background:linear-gradient(var(--ink),var(--ink)) center/14px 1.5px no-repeat,linear-gradient(var(--ink),var(--ink)) center/1.5px 14px no-repeat;transition:transform .25s var(--ease)}
.faq-list details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-list p{color:var(--slate);font-size:15px;margin-top:16px;line-height:1.75;max-width:64ch}

/* Related */
.related-section .section-heading{margin-bottom:0}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:var(--sp-lg);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.related-grid>span{display:none}
.related-grid a{display:block;background:var(--paper);padding:26px 20px;font-size:16px;font-weight:600;line-height:1.4;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .2s,color .2s,padding-left .2s}
.related-grid a:hover{background:var(--paper-raised);color:var(--verdigris);padding-left:28px}

/* Gallery — asymmetric 60/40: lead image spans both rows */
.gallery-section{background:var(--ink-soft)}
.gallery-section .section-heading .eyebrow{color:var(--verdigris-bright);border-left-color:var(--verdigris-bright)}
.gallery-section h2,.gallery-section .section-heading p{color:var(--ink)}
.gallery-section .section-heading p{color:var(--slate)}
.gallery-grid{display:grid;grid-template-columns:3fr 2fr;grid-template-rows:200px 200px;gap:var(--sp-xs);margin-top:var(--sp-lg)}
.gallery-item{padding:0;text-align:left;background:none;overflow:hidden;position:relative}
.gallery-item:nth-child(1){grid-column:1;grid-row:1/3}
.gallery-item:nth-child(2){grid-column:2;grid-row:1}
.gallery-item:nth-child(3){grid-column:2;grid-row:2}
.gallery-item img{width:100%;height:100%;display:block;object-fit:cover;transition:transform .5s var(--ease)}
.gallery-item:hover img{transform:scale(1.045)}
.gallery-item>span{position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:13px;font-weight:600;color:var(--ink);background:linear-gradient(0deg,rgba(7,20,38,.9),transparent)}

/* Dialog */
dialog{border:1px solid var(--line);background:var(--paper);color:var(--ink);width:min(960px,calc(100% - 36px));max-height:90vh;padding:48px 24px 22px}
dialog::backdrop{background:rgba(0,0,0,.78)}
dialog img{width:100%;height:auto;max-height:70vh;object-fit:contain;display:block}
dialog p{margin-top:16px;font-size:14px;color:var(--slate)}
.dialog-close{position:absolute;top:8px;right:14px;font-size:26px;background:none;border:none;min-width:40px;min-height:40px;color:var(--ink)}

/* Final CTA */
.final-cta{background:var(--paper-raised);color:var(--ink);border-top:none}
.final-cta .eyebrow{color:var(--verdigris-bright);border-left-color:var(--verdigris-bright)}
.final-cta p{color:var(--slate);margin:20px 0 32px;max-width:52ch}

/* Footer */
.site-footer{background:var(--paper-raised);color:var(--slate);padding:var(--sp-xl) 0 var(--sp-sm);border-top:1px solid var(--line)}
.footer-top{display:flex;justify-content:space-between;gap:48px}
.footer-top .brand{color:var(--ink)}
.footer-top p{font-size:14px;margin-top:18px;line-height:1.7}
.footer-top .eyebrow{color:var(--verdigris-bright);border-left-color:var(--verdigris-bright);margin-top:0;margin-bottom:14px}
.footer-top a[href^='mailto']{font-size:17px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.footer-bottom{border-top:1px solid var(--line);margin-top:var(--sp-lg);padding-top:24px;display:flex;justify-content:space-between;gap:20px;font-size:12px}
.footer-bottom>div{display:flex;gap:24px}
.footer-bottom a{border-bottom:1px solid var(--line)}

/* Form */
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
label{display:block;font-size:13px;font-weight:600;color:var(--slate)}
input,textarea{display:block;width:100%;margin-top:9px;border:none;border-bottom:1.5px solid var(--line);background:transparent;color:var(--ink);padding:12px 2px;min-width:0;font-size:15px;transition:border-color .2s}
input:focus,textarea:focus{border-bottom-color:var(--verdigris);outline:none}
textarea{resize:vertical}
input::placeholder,textarea::placeholder{color:var(--slate)}
.wide{grid-column:1/-1}
.form-note{font-size:13px;color:var(--slate);margin:24px 0}
.form-note a{color:var(--verdigris);border-bottom:1px solid var(--line)}
#email-result{margin-top:var(--sp-md);padding:28px;background:var(--paper-raised);border-left:2px solid var(--verdigris)}
#email-result h3{margin-bottom:4px}
#email-result p{color:var(--slate);font-size:14px;margin:14px 0}
#email-preview{font-size:13px;font-family:ui-monospace,'SF Mono',Consolas,monospace}
.composer-section form{max-width:960px}
noscript p{padding:20px 0}

/* Glossary */
.glossary-section{padding-top:0}
.glossary-letter{font-family:var(--sans);font-size:24px;font-weight:800;color:var(--verdigris);margin:48px 0 4px;padding-top:28px;border-top:1px solid var(--line)}
.glossary-section>.container>.glossary-letter:first-child{margin-top:0;padding-top:0;border-top:none}
.glossary-group{margin:0;padding:0}
.glossary-group dt{font-size:16px;font-weight:700;padding:16px 0 2px}
.glossary-group dd{margin:0;padding:0 0 14px;color:var(--slate);font-size:15px;line-height:1.7;max-width:70ch;border-bottom:1px solid var(--line)}
.glossary-group dt:first-of-type{padding-top:0}
.glossary-group dd a{display:inline-block;font-size:12.5px;font-weight:700;color:var(--verdigris);margin-top:8px}

/* One orchestrated entrance, not per-section scroll reveals */
.hero-copy>*{opacity:0;animation:rise .7s var(--ease) forwards}
.hero-copy .eyebrow{animation-delay:.02s}
.hero-copy h1{animation-delay:.08s}
.hero-copy .hero-intro{animation-delay:.16s}
.hero-copy .button-row{animation-delay:.24s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}

/* Responsive */
@media(min-width:1600px){:root{--container:1520px}.hero-image img{height:480px}}
@media(max-width:1100px){
  .container{width:calc(100% - 48px)}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-plate,.hero-image figcaption{max-width:560px}
  .checklist-layout,.faq-layout{grid-template-columns:1fr;gap:40px}
  .cards,.related-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .header-inner{min-height:72px}
  .menu-toggle{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:9px 14px;font-size:12px;font-weight:600}
  nav{display:none;position:absolute;top:72px;left:0;right:0;max-height:calc(100dvh - 72px);overflow:auto;background:var(--paper);border-bottom:1px solid var(--line);padding:16px 24px;align-items:stretch;gap:0}
  nav.is-open{display:flex;flex-direction:column}
  .nav-group{border-bottom:1px solid var(--line)}
  .nav-group>summary,nav>a{padding:16px 0;font-size:15px}
  .nav-panel{position:static;width:auto;background:none;box-shadow:none;border:none;margin-bottom:8px;padding:0}
  .nav-panel a{font-size:14px;padding:11px 0 11px 14px;border-left-color:var(--line)}
  .nav-cta{margin-top:12px;text-align:center}
  .hero{padding-top:var(--sp-lg)}
  .hero-home{padding-top:var(--sp-xl)}
  h1{font-size:34px;max-width:none}
  .hero-intro{font-size:15.5px}
  .hero-image img{height:300px}
  .hero-plate{grid-template-columns:1fr}
  .hero-plate span{border-left:none;border-top:1px solid var(--line)}
  .hero-plate span:first-child{border-top:none}
  .section{padding:var(--sp-xl) 0}
  .cards,.related-grid{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:1fr;grid-template-rows:none}
  .gallery-item:nth-child(1),.gallery-item:nth-child(2),.gallery-item:nth-child(3){grid-column:1;grid-row:auto}
  .gallery-item img{height:220px}
  .field-grid{grid-template-columns:1fr}
  .footer-top{flex-direction:column;gap:32px}
  .footer-bottom{flex-direction:column;gap:14px}
}
@media(max-width:420px){
  h1{font-size:29px}
  .button{padding:0 18px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  .hero-copy>*{opacity:1}
}
.cookie-banner{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--sp-sm);padding:var(--sp-sm) 16px;background:var(--paper-raised);border-top:1px solid var(--line);color:var(--ink);font-size:14px;line-height:1.5}
.cookie-banner[hidden]{display:none}
.cookie-banner p{max-width:760px;margin:0;color:var(--slate)}
.cookie-banner a{color:var(--ink);text-decoration:underline}
.cookie-actions{display:flex;flex-wrap:wrap;gap:var(--sp-2xs)}
.cookie-actions .button{min-height:44px}
.text-button{background:none;border:0;padding:0;color:inherit;font:inherit;text-decoration:underline;cursor:pointer}
.cookie-banner :focus-visible,.text-button:focus-visible{outline:2px solid var(--verdigris);outline-offset:3px}
@media(max-width:600px){.cookie-banner{flex-direction:column;align-items:stretch}.cookie-actions .button{flex:1;justify-content:center}}