/* AMS — amsmat.com
   Porcelain-white lab surfaces, slim sticky nav, dark photographic hero; specs set in mono like a datasheet. */
:root{
  --bg:#f6f7f8; --surface:#ffffff; --ink:#14202b; --muted:#5d6b77; --line:#dde2e6;
  --accent:#1d5c7a; --accent-soft:#e3eef3; --ivory:#efe6d4; --chroma:#d8b98d;
  --logo-chip:transparent; --frame:#1b2630;
  --display:"Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body:"IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, Menlo, monospace;
  --max:1160px;
}
:root{color-scheme:light}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:16px/1.65 var(--body)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--surface)}
.wrap{max-width:var(--max);margin:0 auto;padding-left:max(24px,env(safe-area-inset-left,0px));padding-right:max(24px,env(safe-area-inset-right,0px))}
a{color:inherit}
h1,h2,h3{font-family:var(--display);text-wrap:balance;line-height:1.08;margin:0}
p{margin:0}
.eyebrow{font:500 12px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}

/* Nav */
header.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:flex;align-items:baseline;gap:10px;text-decoration:none}
.logo b{font:800 24px/1 var(--display);letter-spacing:-.02em}
.logo span{font:500 10px/1 var(--mono);letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.menu{display:flex;gap:4px;margin-left:auto;list-style:none;padding:0;margin-block:0}
.menu a{display:block;padding:8px 12px;border-radius:6px;text-decoration:none;font:500 13px/1 var(--body);letter-spacing:.06em;color:var(--muted)}
.menu a:hover{color:var(--ink);background:var(--accent-soft)}
.menu a[aria-current="page"]{color:var(--accent);background:var(--accent-soft)}
.menu a:focus-visible,.btn:focus-visible,.burger:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 12px;font:500 13px var(--body);color:var(--ink);cursor:pointer}
@media (max-width:1040px){
  .burger{display:block}
  .menu{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--line);padding:8px max(16px,env(safe-area-inset-left,0px)) 16px}
  .menu.open{display:flex}
  .menu a{padding:12px}
}

.logo{background:var(--logo-chip);padding:6px 8px;border-radius:6px;display:inline-flex}
.logo img{height:24px;width:auto;display:block}
figure{margin:0}
.ph{border-radius:12px;overflow:hidden}
.ph img{display:block;width:100%;height:auto}
figcaption{font:400 12px/1.4 var(--mono);color:var(--muted);margin-top:10px}
.phead{position:relative;overflow:hidden}
.phead .wrap{display:grid;grid-template-columns:1fr minmax(0,560px);gap:32px;align-items:end}
.phead .crowns{max-width:100%;height:auto;display:block}
@media (max-width:760px){.phead .wrap{grid-template-columns:1fr}}
.sched{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.sched figure{background:var(--frame);border-radius:12px;padding:18px}
.sched img{display:block;width:100%;height:auto}
@media (max-width:640px){.sched{grid-template-columns:1fr}}
.stepgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.scard{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.scard img{display:block;width:100%;height:auto;background:#3b3566}
.scard .tx{padding:16px 18px;display:grid;grid-template-columns:36px 1fr;gap:4px 10px}
.scard .n{font:500 13px/1.5 var(--mono);color:var(--accent);grid-row:span 2}
.scard b{font:600 16px var(--display)}
.scard p{color:var(--muted);font-size:14.5px;line-height:1.5}
.scard.wide{grid-column:1/-1}
.scard.noimg{background:var(--accent-soft);border-color:transparent}
@media (max-width:700px){.stepgrid{grid-template-columns:1fr}}
.certs{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.certs img{height:34px;width:auto;background:#fff;border-radius:6px;padding:4px 6px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:999px;text-decoration:none;font:600 14px/1 var(--body);letter-spacing:.02em;border:2px solid var(--ink);transition:transform .2s,background .2s}
.btn.primary{background:var(--ink);color:var(--bg)}
.btn:hover{transform:translateY(-1px)}
.btn.ghost:hover{background:var(--accent-soft)}

/* Home hero: always-dark photographic band (matches the black product photo) */
.hero{background:#0b0b0c;color:#f1f3f5;padding-block:0}
.hero .wrap{display:grid;grid-template-columns:1fr 1.3fr;gap:24px;align-items:center;min-height:520px}
.hero-copy{padding-block:56px}
.hero .eyebrow{color:#8fc3db}
.hero h1{font-size:clamp(48px,7.5vw,100px);font-weight:800;letter-spacing:-.035em;margin-top:18px;color:#fff}
.hero h1 em{font-style:normal;color:#d9bf94}
.hero .lead{font-size:19px;color:#a9b2ba;margin-top:22px;max-width:30ch}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.hero .btn{border-color:#f1f3f5}
.hero .btn.primary{background:#f1f3f5;color:#0b0b0c}
.hero .btn.ghost{color:#f1f3f5}
.hero .btn.ghost:hover{background:rgba(255,255,255,.08)}
.hero-photo{position:relative;padding-block:40px;display:grid;justify-items:center}
.hero-photo::before{content:"";position:absolute;inset:10% 5%;background:radial-gradient(closest-side,rgba(217,191,148,.18),transparent);pointer-events:none}
.hero-photo img{position:relative;display:block;width:100%;max-width:720px;height:auto;filter:drop-shadow(0 30px 40px rgba(0,0,0,.6))}
.hero-photo figcaption{position:relative;margin-top:18px;font:400 14px/1 var(--mono);letter-spacing:.08em;color:#c9cfd4}
.hero-photo figcaption span{color:#e0473a}
@media (max-width:880px){.hero .wrap{grid-template-columns:1fr;min-height:0}.hero-copy{padding-block:48px 0}.hero-photo{padding-block:24px 48px}}
.shade-row{padding-block:40px 56px}

/* Shade strip (Vita 16) */
.shades{display:grid;grid-template-columns:repeat(16,1fr);height:10px;border-radius:4px;overflow:hidden}
.shade-labels{display:grid;grid-template-columns:repeat(16,1fr);margin-top:8px;font:400 10px/1 var(--mono);color:var(--muted);text-align:center}
@media (max-width:600px){.shade-labels span:nth-child(even){visibility:hidden}}

/* Product cards (home) */
.products{padding-block:24px 80px}
.products .wrap{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:32px;display:flex;flex-direction:column;gap:14px;text-decoration:none;transition:border-color .2s}
.pcard:hover{border-color:var(--accent)}
.pcard h3{font-size:32px;letter-spacing:-.02em}
.pcard p{color:var(--muted)}
.pcard .more{margin-top:auto;font:500 13px var(--mono);color:var(--accent)}
.pcard .stat{display:flex;gap:28px;padding-block:6px;flex-wrap:wrap}
.pcard .stat div{font:500 12px/1.3 var(--mono);color:var(--muted)}
.pcard .stat b{display:block;font:600 26px/1.1 var(--display);color:var(--ink)}
@media (max-width:720px){.products .wrap{grid-template-columns:1fr}}

/* Sub page header */
.phead{padding-block:64px 40px;border-bottom:1px solid var(--line)}
.phead h1{font-size:clamp(44px,7vw,84px);font-weight:800;letter-spacing:-.035em;margin-top:14px}
.section{padding-block:64px}
.section + .section{border-top:1px solid var(--line)}
.split{display:grid;grid-template-columns:240px 1fr;gap:48px}
.split > *{min-width:0}
.split h2{font-size:22px;font-weight:600}
.prose{max-width:66ch;display:flex;flex-direction:column;gap:16px;color:var(--ink)}
.prose p{color:var(--muted)}
.prose strong{color:var(--ink)}
@media (max-width:760px){.split{grid-template-columns:1fr;gap:16px}}

.quote{font:600 clamp(26px,4vw,44px)/1.15 var(--display);letter-spacing:-.02em;max-width:22ch}
.quote span{color:var(--accent)}

.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:8px}
.facts div{background:var(--surface);padding:22px}
.facts b{display:block;font:600 30px/1 var(--display);margin-bottom:8px}
.facts span{font:400 12px/1.4 var(--mono);color:var(--muted)}
@media (max-width:600px){.facts{grid-template-columns:1fr}}

/* Spec table */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
table{width:100%;border-collapse:collapse;min-width:720px;font-variant-numeric:tabular-nums}
th{font:500 11px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-align:left;padding:16px 18px;border-bottom:1px solid var(--line)}
td{padding:18px;border-bottom:1px solid var(--line);vertical-align:middle;font-size:15px}
tr:last-child td{border-bottom:0}
td.model b{font:600 16px var(--display);display:block}
td.model span{font:400 12px var(--mono);color:var(--muted)}
.mono{font-family:var(--mono);font-size:14px}
.bar{height:6px;background:var(--accent-soft);border-radius:3px;width:120px;margin-top:6px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent)}
.trans{display:flex;gap:3px;margin-top:6px}
.trans i{width:16px;height:16px;border-radius:50%;border:1px solid var(--line);background:var(--surface)}
.trans i.on{background:var(--chroma);border-color:var(--chroma)}
.trans i.half{background:linear-gradient(90deg,var(--chroma) 50%,var(--surface) 50%);border-color:var(--chroma)}
.note{font:400 12px/1.5 var(--mono);color:var(--muted);margin-top:12px}

.lines{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.line-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:26px;display:flex;flex-direction:column;gap:12px}
.line-card h3{font-size:22px}
.line-card p{color:var(--muted);font-size:15px}
.chip{align-self:flex-start;font:500 11px/1 var(--mono);letter-spacing:.06em;padding:6px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
@media (max-width:900px){.lines{grid-template-columns:1fr}}

/* Liquid swatches */
.swatches{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.sw{display:grid;grid-template-columns:48px 1fr;gap:14px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px}
.sw .dot{width:48px;height:48px;border-radius:50%;box-shadow:inset 0 -6px 12px rgba(0,0,0,.12),inset 0 4px 8px rgba(255,255,255,.5);border:1px solid var(--line)}
.sw b{font:600 15px var(--display);display:block}
.sw p{font-size:13.5px;color:var(--muted);line-height:1.5;margin-top:2px}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.filters button{font:500 13px var(--body);padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--muted);cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}

.steps{display:grid;gap:12px;counter-reset:s}
.step{display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:start;padding:18px 0;border-bottom:1px solid var(--line)}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);font:500 13px/1.8 var(--mono);color:var(--accent)}
.step b{font:600 16px var(--display)}
.step p{color:var(--muted);font-size:15px}
.callout{background:var(--accent-soft);border-radius:12px;padding:22px 24px;display:flex;gap:24px;flex-wrap:wrap;align-items:center}
.callout b{font:600 28px/1 var(--display)}
.callout span{font:400 13px/1.4 var(--mono);color:var(--muted)}

.placeholder{padding-block:120px;text-align:left}
.placeholder p{color:var(--muted);max-width:52ch;margin-top:16px}

/* Footer */
footer{background:var(--surface);border-top:1px solid var(--line);padding-block:56px 40px;margin-top:0}
footer .grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:32px}
footer h4{font:500 11px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
footer p{font-size:14px;color:var(--muted);line-height:1.6}
footer .badge{display:inline-flex;align-items:center;gap:8px;margin-top:16px;border:1px solid var(--line);border-radius:6px;padding:6px 10px;font:500 11px var(--mono);color:var(--muted)}
footer .copy{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);font:400 12px var(--mono);color:var(--muted);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
@media (max-width:860px){footer .grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){footer .grid{grid-template-columns:1fr}}

main{animation:fade .35s ease}
@keyframes fade{from{opacity:.4;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){main{animation:none}.btn{transition:none}}

/* ---- Pages added for the full site ---- */
.ifu-doc .wrap{display:flex;flex-direction:column;gap:8px}
.ifu-doc .back{align-self:center;width:100%;max-width:820px;font:500 13px var(--mono);color:var(--accent);text-decoration:none;padding:6px 0}
.ifu-doc .back:hover{text-decoration:underline}
main .ams-ifu{--bg:transparent;--paper:var(--surface);--fg:var(--ink);--muted:var(--muted);--line:var(--line);--accent:#c8232c;--accent-soft:#fbeaea;--warn:#8a5a00;--warn-soft:#fbf2df;padding:0}
main .ams-ifu .wrap{padding:8px 0 0}
main .ams-ifu .tabs{position:static;padding:0;margin:0;background:none;z-index:auto}
main .ams-ifu footer{border:0;margin:0}
.dllist.ifulist .ic{background:#fbeaea;color:#c8232c}
.sinter{margin-top:24px;display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:center;background:var(--accent-soft);border-radius:12px;padding:24px}
.sinter > *{min-width:0}
.sinter-chart{background:var(--frame);border-radius:10px;padding:12px}
.sinter-chart img{display:block;width:100%;height:auto}
.sinter-list{margin:12px 0 14px;display:grid;gap:0}
.sinter-list div{display:grid;grid-template-columns:130px 1fr;gap:16px;align-items:baseline;padding-block:12px;border-top:1px solid var(--line)}
.sinter-list div:last-child{border-bottom:1px solid var(--line)}
.sinter-list dt{font:600 28px/1 var(--display);color:var(--ink)}
.sinter-list dd{margin:0;font:500 15px/1.4 var(--mono);color:var(--muted)}
.sinter p{color:var(--muted);font-size:14px}
@media (max-width:640px){.sinter{grid-template-columns:1fr}.sinter-chart{max-width:260px}.sinter-list div{grid-template-columns:1fr;gap:4px}}
[hidden]{display:none!important}
img{max-width:100%}
body{margin:0}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px;position:sticky;top:calc(64px + env(safe-area-inset-top,0px));z-index:3;background:var(--bg);padding-block:12px}
.tabs a{font:500 13px var(--body);padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--muted);text-decoration:none}
.tabs a:hover{color:var(--ink)}
.tabs a.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.gcat{scroll-margin-top:140px}
.gcat + .gcat{margin-top:56px}
.gcat h2{font-size:28px;margin-bottom:6px}
.gcat .count{font:400 12px var(--mono);color:var(--muted);margin-bottom:20px}
.gcat .count a{color:var(--accent)}
.ggrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.gitem{position:relative;aspect-ratio:4/3;border-radius:10px;overflow:hidden;background:var(--accent-soft);border:1px solid var(--line);cursor:zoom-in;padding:0;display:block;width:100%;max-width:100%}
.gitem img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.gitem:hover img{transform:scale(1.04)}
.gitem.missing{cursor:default;display:grid;place-items:center;text-align:center;padding:12px}
.gitem.missing span{font:400 11px/1.4 var(--mono);color:var(--muted);word-break:break-all}
.lightbox{position:fixed;inset:0;z-index:20;background:rgba(5,8,10,.92);display:grid;place-items:center;padding:max(24px,env(safe-area-inset-top,0px)) max(16px,env(safe-area-inset-right,0px)) max(24px,env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px))}
.lightbox img{max-width:100%;max-height:86vh;border-radius:8px}
.lightbox button{position:absolute;background:rgba(255,255,255,.1);color:#fff;border:0;border-radius:999px;width:44px;height:44px;font-size:20px;cursor:pointer}
.lightbox .x{top:calc(16px + env(safe-area-inset-top,0px));right:calc(16px + env(safe-area-inset-right,0px))}
.lightbox .prev{left:calc(16px + env(safe-area-inset-left,0px));top:50%}
.lightbox .next{right:calc(16px + env(safe-area-inset-right,0px));top:50%}
.player{background:#0b0b0c;border-radius:14px;overflow:hidden;margin-bottom:32px;scroll-margin-top:84px}
.pstage{position:relative;display:block;width:100%;max-width:100%;aspect-ratio:16/9;border:0;padding:0;background:#000;cursor:pointer}
.pstage img{width:100%;height:100%;object-fit:cover;display:block}
.pstage iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.pplay{position:absolute;left:50%;top:50%;width:84px;height:58px;margin:-29px 0 0 -42px;border-radius:14px;background:#e3261c url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M8 5v14l11-7z' fill='white'/%3E%3C/svg%3E") center/34px no-repeat;box-shadow:0 8px 24px rgba(0,0,0,.35);transition:transform .2s}
.pstage:hover .pplay{transform:scale(1.06)}
.pstage:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}
.pcap{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;padding:18px 24px;color:#f1f3f5}
.pcap b{font:600 clamp(17px,2.2vw,22px)/1.3 var(--display)}
.pcap span{font:400 12px var(--mono);color:#98a2ab}
.vlist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.vitem{display:flex;flex-direction:column;padding:0;border:2px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface);cursor:pointer;text-align:center;color:var(--ink);transition:border-color .2s,transform .2s}
.vitem:hover{transform:translateY(-2px);border-color:var(--muted)}
.vitem:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.vitem.on{border-color:#e3261c}
.vitem.on .vt{color:#e3261c}
.vimg{display:block;aspect-ratio:16/9;background:#000;overflow:hidden}
.vimg img{width:100%;height:100%;object-fit:cover;display:block}
.vt{display:block;padding:16px 14px;font:500 16px/1.4 var(--body)}
@media (max-width:900px){.vlist{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}}
@media (max-width:560px){.vlist{grid-template-columns:1fr}.pcap{padding:14px 16px}.pplay{width:68px;height:48px;margin:-24px 0 0 -34px}}
.dlgroup + .dlgroup{margin-top:40px}
.dlgroup h2{font-size:22px;margin-bottom:14px}
.dllist{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:12px;background:var(--surface);overflow:hidden}
.dllist li + li{border-top:1px solid var(--line)}
.dllist a{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:16px 18px;text-decoration:none}
.dllist a:hover{background:var(--accent-soft)}
.dllist .ic{width:44px;height:44px;border-radius:8px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font:600 11px var(--mono)}
.dllist b{font:600 15px var(--body);display:block;min-width:0;overflow-wrap:anywhere}
.dllist span{font:400 12px var(--mono);color:var(--muted)}
.dllist .go{font:500 13px var(--mono);color:var(--accent);white-space:nowrap}
@media (max-width:520px){.dllist a{grid-template-columns:36px 1fr}.dllist .go{display:none}.dllist .ic{width:36px;height:36px}}