:root { font-family:Arial,Helvetica,sans-serif; font-synthesis:none; text-rendering:optimizeLegibility; -webkit-font-smoothing:antialiased; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; background:#090a0e; }
body { margin:0; font-size:16px; line-height:1.6; color:var(--ink); overflow-wrap:anywhere; }
a { color:inherit; text-decoration:none; }
a:hover { text-decoration:underline; text-underline-offset:5px; }
button { font:inherit; cursor:pointer; }
button,a,summary { -webkit-tap-highlight-color:transparent; }
h1,h2,h3,p,figure { margin:0; }
h1,h2,h3 { font-weight:400; }
h1 { font-size:clamp(64px,8vw,112px); line-height:1; letter-spacing:-.07em; }
h2 { font-size:clamp(26px,3vw,36px); line-height:1.16; letter-spacing:-.045em; }
h3 { font-size:17px; line-height:1.35; }
.project-shell { max-width:1280px; padding:0 clamp(22px,5vw,64px); margin:auto; }
.site-header { display:flex; align-items:center; justify-content:space-between; gap:24px; padding:27px 0; }
.wordmark { font-size:18px; letter-spacing:-.04em; }
.main-nav { display:flex; flex-wrap:wrap; gap:24px; font-size:14px; }
.main-nav a { display:inline-flex; align-items:center; min-height:44px; }
.main-nav a[aria-current] { text-decoration:underline; text-underline-offset:5px; }
.skip-link { position:absolute; top:-90px; left:22px; background:#17181d; color:#fff; z-index:5; padding:10px 16px; border-radius:6px; }
.skip-link:focus { top:16px; }
.back-link { display:inline-flex; align-items:center; min-height:44px; font-size:12px; color:var(--secondary); margin-top:13px; }
.project-hero { padding:35px 0 36px; }
.eyebrow { font-size:11px; letter-spacing:.13em; text-transform:uppercase; color:var(--secondary); margin-bottom:18px; }
.project-title-row { display:flex; align-items:center; justify-content:space-between; gap:24px; }
.project-subtitle { font-size:clamp(23px,3vw,34px); letter-spacing:-.035em; margin-top:8px; }
.project-status { display:inline-flex; align-items:center; flex:0 0 auto; border:1px solid var(--line); border-radius:30px; padding:7px 13px; font-size:12px; }
.project-lede { max-width:650px; color:var(--secondary); font-size:18px; line-height:1.55; margin-top:26px; }
.project-facts { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; border-top:1px solid var(--line); padding-top:22px; margin:30px 0 0; }
.project-facts dt { font-size:11px; color:var(--secondary); margin-bottom:4px; }
.project-facts dd { font-size:14px; margin:0; }
.cad-gallery { padding-bottom:42px; }
.assembly-section,.drawing-section { padding-bottom:42px; }
.model-frame { border:1px solid #c6c9d0; border-radius:8px; overflow:hidden; background:#e6e8ec; }
.model-viewport { position:relative; height:clamp(300px,42vw,510px); }
.model-viewport canvas { display:block; width:100%; height:100%; touch-action:none; cursor:grab; }
.model-viewport canvas:active { cursor:grabbing; }
.model-viewport [hidden] { display:none; }
.model-viewport>img { position:absolute; inset:0; width:100%; height:100%; object-fit:contain; padding:32px; }
.model-toolbar { display:flex; justify-content:space-between; gap:16px; align-items:center; padding:14px 18px; background:#f0f1f3; border-top:1px solid #c6c9d0; }
.model-main-controls,.model-zoom-controls { display:flex; gap:8px; }
.model-toolbar button { border:1px solid #b4bac4; border-radius:5px; background:transparent; color:#20242c; padding:9px 14px; min-height:44px; font-size:13px; }
.model-toolbar button:hover:not(:disabled) { background:#dce0e6; }
.model-toolbar button[aria-pressed="true"] { background:#252c37; color:#fff; border-color:#252c37; }
.model-toolbar button[aria-pressed="true"]:hover:not(:disabled) { background:#354253; }
.model-toolbar button:disabled { opacity:.45; cursor:wait; }
.model-zoom-controls button { width:44px; padding:5px; font-size:21px; }
.model-caption { display:flex; justify-content:space-between; flex-wrap:wrap; gap:5px 24px; color:var(--secondary); font-size:12px; padding:12px 0 6px; }
.model-keyboard-help { font-size:11px; max-width:780px; }
.drawing-preview { display:block; background:#fff; border-radius:8px; overflow:hidden; border:1px solid var(--line); }
.drawing-preview img { display:block; width:100%; height:auto; }
.drawing-open { text-decoration:underline; text-underline-offset:4px; font-size:13px; flex-shrink:0; }
:focus-visible { outline:3px solid #3974c5; outline-offset:4px; }
.model-viewport canvas:focus-visible { outline-offset:-4px; }
.gallery-heading,.gallery-footer { display:flex; align-items:center; justify-content:space-between; gap:15px; }
.gallery-heading { margin-bottom:17px; }
.gallery-heading h2 { font-size:24px; }
.cad-stage { background:#e5e7eb; border-radius:8px; aspect-ratio:2.15; position:relative; overflow:hidden; }
.cad-stage img { position:absolute; inset:0; display:block; width:100%; height:100%; padding:24px; object-fit:contain; }
.gallery-figure figcaption { display:flex; justify-content:space-between; align-items:flex-start; gap:20px; font-size:12px; color:var(--secondary); padding:13px 0 17px; min-height:61px; }
#cad-position { flex:0 0 auto; font-variant-numeric:tabular-nums; }
.cad-thumbnails { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
.cad-thumbnail { display:grid; gap:8px; padding:8px; border:1px solid var(--line); border-radius:6px; background:transparent; color:var(--ink); text-align:left; min-width:0; }
.cad-thumbnail img { width:100%; height:78px; display:block; object-fit:contain; background:#e5e7eb; border-radius:3px; }
.cad-thumbnail span { padding:0 4px 3px; font-size:12px; }
.cad-thumbnail[aria-pressed="true"] { border:2px solid currentColor; padding:7px; }
.cad-thumbnail:hover { background:rgba(128,128,128,.08); }
.gallery-footer { margin-top:14px; font-size:12px; }
.gallery-footer a,.measurement-note a { text-decoration:underline; text-underline-offset:4px; }
.small-note { color:var(--secondary); font-size:12px; }
.story-section { display:grid; grid-template-columns:1fr 1.5fr; gap:55px; border-top:1px solid var(--line); padding:40px 0; scroll-margin-top:25px; }
.story-section .eyebrow { margin-bottom:12px; }
.story-copy { max-width:640px; }
.story-copy>p,.design-notes p,.next-steps p { color:var(--secondary); font-size:15px; }
.story-copy>p+p { margin-top:17px; }
.design-notes { display:grid; gap:22px; }
.design-notes p { margin-top:7px; }
.measurement-note { border-top:1px solid var(--line); margin-top:24px; padding-top:12px; }
.measurement-note summary { cursor:pointer; font-size:13px; min-height:44px; padding:10px 0; }
.measurement-note p { margin-top:12px; font-size:14px; color:var(--secondary); }
.measurement-note .small-note { font-size:12px; }
.next-steps { margin:24px 0 0; padding:0; list-style:none; display:grid; gap:19px; }
.next-steps li { display:flex; gap:18px; }
.next-steps li>span { font-size:11px; padding-top:4px; color:var(--secondary); }
.next-steps p { margin-top:4px; font-size:13px; }
.progress-section { padding-bottom:50px; }
.site-footer { display:flex; align-items:center; justify-content:space-between; gap:25px; border-top:1px solid var(--line); padding:26px 0 30px; font-size:12px; }
.site-footer p { color:var(--secondary); margin-top:4px; }
.site-footer>a { display:inline-flex; align-items:center; min-height:44px; }
@media(max-width:700px) {
  .site-header { align-items:flex-start; flex-direction:column; gap:12px; padding:24px 0 16px; }
  .main-nav { gap:12px 24px; font-size:13px; }
  .back-link { margin-top:0; }
  .project-hero { padding:25px 0 30px; }
  .project-title-row { flex-direction:column; align-items:flex-start; gap:18px; }
  .project-lede { font-size:16px; margin-top:22px; }
  .project-facts { grid-template-columns:1fr; gap:15px; margin-top:24px; padding-top:20px; }
  .project-facts div { display:grid; grid-template-columns:100px 1fr; gap:12px; align-items:baseline; }
  .project-facts dt { margin:0; }
  .project-facts dd { font-size:13px; }
  .cad-stage { aspect-ratio:1.45; }
  .cad-stage img { padding:12px; }
  .gallery-heading h2 { font-size:24px; }
  .cad-thumbnails { gap:7px; }
  .cad-thumbnail { padding:5px; gap:6px; }
  .cad-thumbnail[aria-pressed="true"] { padding:4px; }
  .cad-thumbnail img { height:46px; }
  .cad-thumbnail span { padding:0 1px 3px; font-size:10px; }
  .gallery-footer { align-items:flex-start; font-size:11px; }
  .gallery-figure figcaption { gap:12px; min-height:78px; font-size:11px; }
  .cad-gallery { padding-bottom:30px; }
  .assembly-section,.drawing-section { padding-bottom:30px; }
  .model-toolbar { gap:6px; padding:10px; flex-wrap:wrap; }
  .model-toolbar button { font-size:12px; padding:8px 10px; }
  .model-zoom-controls button { font-size:20px; width:40px; }
  .model-main-controls,.model-zoom-controls { gap:5px; }
  .assembly-section>.gallery-heading { align-items:flex-start; flex-direction:column; gap:6px; }
  .story-section { grid-template-columns:1fr; gap:20px; padding:30px 0; }
  .story-section h2 br { display:none; }
  .story-copy>p,.design-notes p { font-size:14px; }
  .story-section .eyebrow { margin-bottom:10px; }
  .site-footer { flex-direction:column; align-items:flex-start; gap:12px; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }