/* Layout: clinical spec sheet. Left aligned type, one tall product photo, hard edged panels, a red dot for the 635nm aiming beam. */
:root{
  --bone:#f3f5f3;
  --paper:#ffffff;
  --ink:#0d1f22;
  --mute:#4d5f62;
  --line:#d5dcda;
  --deep:#0d1f22;
  --deep2:#16302f;
  --beam:#d6322a;
  --accent:#12665c;
  --serif:'Newsreader',Georgia,'Times New Roman',serif;
  --sans:'Hanken Grotesk',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bone);color:var(--ink);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.1;text-wrap:balance}
h2{font-size:clamp(30px,4vw,46px);margin-bottom:20px}
h3{font-size:24px;margin-bottom:8px}
.w{max-width:1160px;margin:0 auto;padding-inline:24px}
.eyebrow{margin-bottom:14px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--accent);display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--beam);box-shadow:0 0 0 4px rgba(214,50,42,.16)}
.lede{font-size:19px;color:var(--mute);max-width:62ch}
header{background:var(--deep);color:#eef3f1}
header .w{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-block:16px}
.logo{font-family:var(--serif);font-size:22px;letter-spacing:.01em}
.btn{display:inline-block;background:var(--beam);color:#fff;padding:14px 26px;border-radius:2px;text-decoration:none;font-weight:600;border:0;cursor:pointer;font:600 16px var(--sans);text-align:center}
.btn:hover{background:#b92820}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #f0a19c;outline-offset:2px}
.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:center;padding-block:64px 56px}
.hero h1{font-size:clamp(40px,6vw,72px);margin:0 0 22px}
.hero h1 em{font-style:italic;color:var(--accent)}
.price{display:inline-flex;align-items:baseline;gap:14px;margin:26px 0 8px;padding:14px 20px;background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--beam)}
.price span{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);font-weight:600}
.price strong{font-family:var(--serif);font-weight:500;font-size:32px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.shot{position:relative;background:var(--deep);border-radius:2px;overflow:hidden}
.shot img{width:100%;aspect-ratio:700/977;object-fit:cover}
.shot figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;background:linear-gradient(transparent,rgba(13,31,34,.92));color:#eef3f1;font-size:13.5px}
.facts{background:var(--paper);border-block:1px solid var(--line)}
.facts dl{display:grid;grid-template-columns:repeat(5,1fr)}
.facts dl>div{padding:22px 24px;border-left:1px solid var(--line)}
.facts dl>div:first-child{border-left:0;padding-left:0}
.facts dt{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);font-weight:600}
.facts dd{font-family:var(--serif);font-size:25px;margin-top:2px}
section{padding-block:76px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.two>*{min-width:0}
.checks{list-style:none;margin-top:22px;display:grid;gap:12px}
.checks li{padding-left:30px;position:relative}
.checks li::before{content:"";position:absolute;left:0;top:.5em;width:14px;height:8px;border-left:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);transform:rotate(-45deg)}
.screen img{border:1px solid var(--line);border-radius:2px}
.screen p{font-size:14px;color:var(--mute);margin-top:10px}
.specs{overflow-x:auto;margin-top:26px;border:1px solid var(--line);background:var(--paper)}
table{width:100%;border-collapse:collapse;min-width:520px}
th,td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:16px;vertical-align:top}
tr:last-child th,tr:last-child td{border-bottom:0}
th{width:34%;font-weight:600;color:var(--ink);background:#f8faf9}
.note{font-size:14px;color:var(--mute);margin-top:12px}
.band{background:var(--deep);color:#e8efed}
.band h2,.band h3{color:#fff}
.band .eyebrow{color:#9fd3c9}
.band p{color:#b9c9c6}
.band a{color:#9fd3c9}
.profile{border:1px solid #2c4745;background:var(--deep2);padding:30px}
.profile h3{font-size:30px}
.profile .role{color:#9fd3c9;font-size:14px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;margin-bottom:14px}
.profile ul{list-style:none;margin-top:16px;display:grid;gap:8px}
.profile li{color:#d6e2df;font-size:16px;padding-left:18px;position:relative}
.profile li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:2px;background:var(--beam)}
.tag{display:inline-block;margin-top:20px;padding:8px 14px;border:1px solid #9fd3c9;color:#d6f0ea;font-size:14px;font-weight:600;letter-spacing:.02em}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.step{background:var(--paper);border:1px solid var(--line);padding:26px}
.step p{color:var(--mute);font-size:16px}
.areas{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.areas div{border-top:3px solid var(--ink);padding-top:14px}
.areas p{color:var(--mute);font-size:16px}
details{border-bottom:1px solid var(--line);padding:20px 0}
summary{font-weight:600;cursor:pointer;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:24px;line-height:1;color:var(--accent)}
details[open] summary::after{content:"\2212"}
details p{color:var(--mute);margin-top:10px;max-width:70ch}
.faq{max-width:820px}
form{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}
form .f{grid-column:1/-1}
label{font-size:14px;display:block;margin-bottom:6px;color:#d6e2df;font-weight:500}
input,select,textarea{width:100%;padding:13px 14px;border:1px solid #3b5856;background:#102a2a;color:#fff;border-radius:2px;font:inherit}
select option{color:#000}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
#status{margin-top:16px;font-weight:600}
.contact{margin-top:30px;padding-top:24px;border-top:1px solid #2c4745;font-size:16px;color:#b9c9c6}
footer{padding-block:34px;font-size:14px;color:var(--mute)}
footer p+p{margin-top:8px}
@media(max-width:900px){
  .hero,.two{grid-template-columns:1fr;gap:36px}
  .hero{padding-block:40px 40px}
  .facts dl{grid-template-columns:repeat(2,1fr)}
  .facts dl>div:first-child{border-left:0;padding-left:0}
  .facts dl>div:nth-child(odd){border-left:0;padding-left:0}
  .facts dl>div:nth-child(even){padding-left:24px}
  .facts dl>div{border-top:1px solid var(--line);padding-block:16px}
  .facts dl>div:nth-child(-n+2){border-top:0}
  .facts dl>div:last-child{grid-column:1/-1}
  .steps,.areas{grid-template-columns:1fr}
  section{padding-block:56px}
  form{grid-template-columns:1fr}
  .shot img{aspect-ratio:4/5}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ---- v3 additions: navigation, breadcrumbs, blog, calculator ---- */
header .w{flex-wrap:wrap}
.logo{color:#eef3f1;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo::before{content:"";width:11px;height:11px;border-radius:50%;background:var(--beam);box-shadow:0 0 0 4px rgba(214,50,42,.22)}
nav.main{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
nav.main a{color:#d6e2df;text-decoration:none;font-size:15.5px;font-weight:500}
nav.main a:hover,nav.main a[aria-current="page"]{color:#fff;text-decoration:underline;text-underline-offset:5px}
nav.main a.btn{color:#fff;padding:10px 18px;font-size:15px}
nav.main a.btn:hover{text-decoration:none}
.crumbs{font-size:14px;color:var(--mute);padding-block:22px 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:#9aa8a6}
.crumbs a{color:var(--mute)}
.pagehead{padding-block:28px 40px}
.pagehead h1{font-size:clamp(34px,5vw,56px);margin-bottom:18px}
.meta{font-size:14.5px;color:var(--mute);display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:16px}
.article{display:grid;grid-template-columns:minmax(0,720px) 280px;gap:64px;justify-content:center;padding-block:10px 70px;align-items:start}
.prose{font-size:18.5px;line-height:1.7}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(28px,3.4vw,36px);margin-top:1.9em;margin-bottom:.1em;scroll-margin-top:24px}
.prose h3{font-size:24px;margin-top:1.5em;margin-bottom:0}
.prose ul,.prose ol{padding-left:1.3em;display:grid;gap:.5em}
.prose li::marker{color:var(--accent)}
.prose a{text-underline-offset:3px}
.prose .answer{font-size:20px;color:var(--ink);border-left:4px solid var(--beam);padding:4px 0 4px 20px}
.prose table{min-width:0;font-size:16px;background:var(--paper);border:1px solid var(--line)}
.prose .tbl{overflow-x:auto}
.prose .callout{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--accent);padding:18px 22px;font-size:17px}
.aside{position:sticky;top:24px;display:grid;gap:22px;font-size:15.5px}
.toc{background:var(--paper);border:1px solid var(--line);padding:20px 22px}
.toc strong{display:block;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);margin-bottom:10px}
.toc ol{list-style:none;display:grid;gap:8px}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}
.sidecta{background:var(--deep);color:#e8efed;padding:22px}
.sidecta p{color:#b9c9c6;margin:8px 0 16px}
.sidecta strong{font-family:var(--serif);font-weight:500;font-size:22px;color:#fff;line-height:1.2;display:block}
.sidecta .btn{display:block}
.endcta{margin-top:2.4em;background:var(--deep);color:#e8efed;padding:30px;display:grid;gap:10px}
.endcta h2{margin:0;color:#fff;font-size:30px}
.endcta p{color:#b9c9c6}
.endcta .cta{margin-top:8px}
.endcta .btn.ghost{color:#fff;border-color:#fff}
.endcta .btn.ghost:hover{background:#fff;color:var(--ink)}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px}
.card{background:var(--paper);border:1px solid var(--line);padding:26px;display:flex;flex-direction:column;gap:10px;text-decoration:none;color:var(--ink);transition:border-color .15s}
.card:hover{border-color:var(--ink)}
.card .k{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:600}
.card h2,.card h3{font-size:27px;margin:0}
.card p{color:var(--mute);font-size:16.5px}
.card .more{margin-top:auto;font-weight:600;color:var(--accent)}
.related{border-top:1px solid var(--line);padding-block:56px 70px;background:var(--paper)}
.related .cards{grid-template-columns:repeat(3,1fr)}
.related .card{background:var(--bone)}
.related .card h3{font-size:22px}
/* calculator */
.calc{margin-top:32px;background:var(--paper);border:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr}
.calc .in{padding:30px;border-right:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:16px;align-content:start}
.calc .in .full{grid-column:1/-1}
.calc label{color:var(--ink);font-weight:600;font-size:14.5px}
.calc input{background:#fff;color:var(--ink);border:1px solid #9aa8a6;font-size:17px}
.calc .hint{font-size:13px;color:var(--mute);margin-top:4px;font-weight:400}
.calc .out{padding:30px;background:#f8faf9;display:grid;grid-template-columns:1fr 1fr;gap:20px 22px;align-content:start}
.calc .out div{border-top:3px solid var(--ink);padding-top:10px}
.calc .out div.big{grid-column:1/-1;border-top-color:var(--beam)}
.calc .out dt{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);font-weight:600}
.calc .out dd{font-family:var(--serif);font-size:30px;line-height:1.15;margin-top:4px}
.calc .out .big dd{font-size:44px}
.chartwrap{grid-column:1/-1;border-top:1px solid var(--line);padding:26px 30px 20px}
.chartwrap h3{font-size:22px;margin-bottom:10px}
#chart{width:100%;height:auto;display:block}
#chart text{font:12px var(--sans);fill:#4d5f62}
.calc-note{font-size:14px;color:var(--mute);margin-top:14px;max-width:80ch}
.section-sub{background:var(--paper);border-block:1px solid var(--line)}
footer .fcols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:26px}
footer h2{font-family:var(--sans);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px;color:var(--ink);font-weight:600}
footer ul{list-style:none;display:grid;gap:8px}
footer a{color:var(--mute)}
@media(max-width:900px){
  .article{grid-template-columns:1fr;gap:30px}
  .aside{position:static;order:-1}
  .cards,.related .cards{grid-template-columns:1fr}
  .calc,.calc .in,.calc .out{grid-template-columns:1fr}
  .calc .in{border-right:0;border-bottom:1px solid var(--line)}
  .calc .in{padding:22px}.calc .out{padding:22px}.chartwrap{padding:20px 18px}
  footer .fcols{grid-template-columns:1fr}
  .prose{font-size:17.5px}
}
@media(max-width:640px){
  nav.main{gap:14px}
  nav.main a:not(.btn):not(.keep){display:none}
  .calc .in{grid-template-columns:1fr}
  .calc .out dd{font-size:26px}.calc .out .big dd{font-size:36px}
}