/* Atrick Design — atrick-design.com
   Concept: the impossible-triangle mark is an isometric drawing, so the page sits on an
   isometric dot grid (the paper you sketch 3D parts on); near the cursor the dots light up.
   Color comes from the materials of the work itself, one per discipline:
     PCB solder-mask green (electronics, and every primary action: green = good to go)
     3D-scan laser blue (scanning), 3D-print violet (printing), casting grey (mechanical)
   No red anywhere (Jay: red reads as negative). Gold only for review stars.
   Type: Barlow (DIN lineage, like drawing lettering) for text, Barlow Semi Condensed for
   headings, echoing the SWIsot1 wordmark. Light background by preference. */

:root {
  --paper:    #f6f7f5;
  --panel:    #eceeeb;
  --tile:     #ffffff;
  --block:    #ffffff;
  --ink:      #1b1d20;
  --graphite: #575d64;
  --hair:     #dcdfdc;
  --dot:      #c9cdc9;
  --green:    #17784a;
  --green-soft: #dcefe4;
  --scan:     #1f6fcf;
  --print:    #5a4fcf;
  --cast:     #66717b;
  --gold:     #d4a017;
  --maxw:     1160px;
  --measure:  68ch;
  --r:        6px;
  --font: "Barlow", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-head: "Barlow Semi Condensed", "Barlow", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141618; --panel: #1b1e21; --tile: #e9ebe8; --block: #1b1e21;
    --ink: #e9ebe8; --graphite: #a3a9b0; --hair: #2b2f33; --dot: #2c3135;
    --green: #4cc38a; --green-soft: #18291f; --scan: #78aef0; --print: #a49cf5; --cast: #a9b3bc; --gold: #e6b93a;
    color-scheme: dark;
  }
  .logo, .mark { filter: invert(1); }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(circle, var(--dot) 1.1px, transparent 1.6px), radial-gradient(circle, var(--dot) 1.1px, transparent 1.6px);
  background-size: 24px 41.57px; background-position: 0 0, 12px 20.78px; background-attachment: fixed; font-family: var(--font); font-size: 18px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img { max-width: 100%; height: auto; }
a { color: var(--green); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 600; letter-spacing: -0.005em; line-height: 1.12; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: 0.5rem 1rem; z-index: 99; }
.skip:focus { left: 0.5rem; top: 0.5rem; }
.muted { color: var(--graphite); }

/* The page sits on an isometric dot grid (body background, fixed to the viewport). This layer
   holds the same lattice in green, masked to a circle around the pointer, so the dots near the
   cursor light up. site.js sets --mx/--my on :root; touch screens never set them. */
.grid-glow { position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(circle, var(--green) 1.3px, transparent 1.9px), radial-gradient(circle, var(--green) 1.3px, transparent 1.9px);
  background-size: 24px 41.57px; background-position: 0 0, 12px 20.78px;
  -webkit-mask-image: radial-gradient(260px circle at var(--mx, -999px) var(--my, -999px), #000, transparent);
          mask-image: radial-gradient(260px circle at var(--mx, -999px) var(--my, -999px), #000, transparent); }
main, .site-footer { position: relative; z-index: 1; }

/* White content blocks: every page header, every section, each Home feature row and the footer.
   Text never sits directly on the dots; the grid shows in the gutters between blocks. */
main > header > .wrap, main > section > .wrap:not(.rows), .feature, .footer-block {
  background: var(--block); border: 1px solid var(--hair); border-radius: 10px; }
main > header > .wrap, main > section > .wrap:not(.rows), .footer-block {
  width: min(var(--maxw), calc(100% - 1.5rem)); padding: 2.6rem 2.4rem; }
@media (max-width: 700px) {
  main > header > .wrap, main > section > .wrap:not(.rows), .footer-block { padding: 1.6rem 1.15rem; }
}

/* isometric dot grid: triangular lattice, 24px pitch */
.iso { background-image:
    radial-gradient(circle, var(--dot) 1.1px, transparent 1.6px),
    radial-gradient(circle, var(--dot) 1.1px, transparent 1.6px);
  background-size: 24px 41.57px; background-position: 0 0, 12px 20.78px; }

/* ---- nav ---- */
.nav { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--hair); }
.nav .wrap { display: flex; align-items: center; gap: 1.4rem; min-height: 3.9rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; margin-right: auto; color: var(--ink); text-decoration: none;
  font-family: var(--font-head); font-weight: 500; font-size: 1.15rem; letter-spacing: 0.14em; }
.brand .logo { width: 38px; height: auto; }
.nav-links { display: flex; align-items: center; gap: 1.3rem; }
.nav-links a { font-size: 0.98rem; color: var(--graphite); text-decoration: none; padding: 0.3rem 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--green); }
.nav-toggle { display: none; background: none; border: 1px solid var(--hair); border-radius: var(--r); color: var(--ink);
  min-width: 2.75rem; min-height: 2.5rem; cursor: pointer; font: inherit; }
.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after { display: block; width: 18px; height: 2px; background: currentColor; position: relative; margin: 0 auto; }
.nav-toggle .bars::before, .nav-toggle .bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle .bars::before { top: -6px; } .nav-toggle .bars::after { top: 6px; }
/* Menus: each top-bar word only opens a list (never a link itself), so a tap always does
   one thing. Native <details>, so they open with JS off; site.js closes the others,
   closes on an outside click or Esc. Opened by click/tap, not hover. */
.nav-menu { position: relative; }
.nav-menu > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.98rem; color: var(--graphite); padding: 0.3rem 0; border-bottom: 2px solid transparent; user-select: none; }
.nav-menu > summary::-webkit-details-marker { display: none; }
.nav-menu > summary::after { content: ""; width: 0.42em; height: 0.42em; border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor; transform: translateY(-0.15em) rotate(45deg); }
.nav-menu[open] > summary::after { transform: translateY(0.1em) rotate(-135deg); }
.nav-menu > summary:hover, .nav-menu[open] > summary { color: var(--ink); }
.nav-menu.current > summary { color: var(--ink); border-bottom-color: var(--green); }
.nav-panel { position: absolute; top: calc(100% + 0.7rem); left: -1rem; min-width: 15rem; padding: 0.45rem 0;
  background: var(--block); border: 1px solid var(--hair); border-radius: 8px; box-shadow: 0 10px 28px rgba(20, 30, 25, 0.12); }
.nav-menu.end .nav-panel { left: auto; right: -1rem; }
.nav-links .nav-panel a { display: block; padding: 0.45rem 1rem; color: var(--ink); white-space: nowrap; border-bottom: 0; }
.nav-links .nav-panel a:hover { background: var(--green-soft); }
.nav-links .nav-panel a[aria-current="page"] { color: var(--green); font-weight: 600; }
@media (max-width: 900px) {
  .js .nav-toggle { display: inline-block; }
  .js .nav-links { display: none; }
  .js .nav.open .nav-links { display: flex; }
  .nav .wrap { flex-wrap: wrap; }
  .nav-links { flex-direction: column; align-items: stretch; gap: 0; width: 100%; padding: 0 0 0.9rem; }
  .nav-links a { padding: 0.6rem 0; width: 100%; }
  .nav-menu > summary { justify-content: space-between; padding: 0.7rem 0; font-size: 1.05rem; border-bottom: 1px solid var(--hair); }
  .nav-menu.current > summary { border-bottom-color: var(--hair); }
  .nav-panel, .nav-menu.end .nav-panel { position: static; min-width: 0; padding: 0.2rem 0 0.5rem 1rem;
    background: none; border: 0; border-radius: 0; box-shadow: none; }
  .nav-links .nav-panel a { padding: 0.55rem 0; white-space: normal; }
  .nav-links .nav-panel a:hover { background: none; color: var(--green); }
  .nav-links > a { padding: 0.7rem 0; font-size: 1.05rem; }
}

/* ---- generic page header (inner pages) ---- */
.hero { padding: 1.4rem 0 0.5rem; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 3rem; align-items: center; }
.hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.2rem); margin: 0 0 1rem; }
.hero p { max-width: var(--measure); color: var(--graphite); }
.hero .lede { font-size: 1.22rem; line-height: 1.5; max-width: var(--measure); margin: 0 0 1.1rem; color: var(--ink); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 1.8rem; } }

/* small context label: sentence case */
.eyebrow { margin: 0 0 0.6rem; font-weight: 600; font-size: 0.98rem; color: var(--green); }
.eyebrow a { color: inherit; }

/* ---- sections: no rules between them; rhythm comes from spacing and alternate bands ---- */
section { padding: 0.5rem 0; }
main > section:last-child { padding-bottom: 1.4rem; }
section h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); margin: 0 0 0.7rem; }
section h3 { font-size: 1.25rem; margin: 1.6rem 0 0.4rem; }
.prose { max-width: var(--measure); }
.wrap.prose { max-width: var(--maxw); }
.wrap.prose > * { max-width: var(--measure); }
.prose ul { padding-left: 1.2rem; } .prose li { margin: 0.3rem 0; }
.section-lede { max-width: var(--measure); color: var(--graphite); font-size: 1.1rem; margin: 0 0 2rem; }

/* Reading path: the last block on every page links to the next page in menu order (build_site.next_link). */
main > section.next-step > .wrap { padding-top: 1.3rem; padding-bottom: 1.3rem; display: flex; justify-content: flex-end; }
.next-link { display: inline-flex; flex-direction: column; align-items: flex-end; gap: 0.1rem; text-decoration: none; text-align: right; }
.next-link span { font-size: 0.95rem; color: var(--graphite); }
.next-link b { font-family: var(--font-head); font-weight: 600; font-size: clamp(1.35rem, 2.6vw, 1.7rem); color: var(--green); }
.next-link b::after { content: " \2192"; }
.next-link:hover b { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 0.18em; }

/* discipline colors */
.c-pcb { --c: var(--green); } .c-scan { --c: var(--scan); } .c-print { --c: var(--print); } .c-cast { --c: var(--cast); }
.tag { display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 600; font-size: 0.95rem; color: var(--c, var(--green)); margin: 0 0 0.5rem; }
.tag::before { content: ""; width: 0.7rem; height: 0.7rem; border-radius: 2px; background: currentColor; }

/* ---- HOME hero: big mark on the isometric grid; dots near the cursor light up green ---- */
.hero-home { padding: 1.4rem 0 0.5rem; }
.hero-home .wrap { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 3.5rem; align-items: center; }
.lockup { display: flex; flex-direction: column; align-items: center; gap: 1.2rem; }
.lockup .mark { width: min(320px, 70vw); height: auto; }
.hero-home h1 { font-size: clamp(2.2rem, 4.8vw, 3.5rem); margin: 0 0 1.1rem; }
.hero-home .lede { font-size: 1.25rem; line-height: 1.5; margin: 0 0 1rem; max-width: 60ch; }
.hero-home p { color: var(--graphite); max-width: 60ch; }
@media (max-width: 900px) {
  .hero-home .wrap { grid-template-columns: 1fr; gap: 2rem; }
  .lockup .mark { width: min(200px, 55vw); }
}

/* ---- proof: spec lines with a colored bar ---- */
.proof { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1.4rem 1.6rem; margin: 1.6rem 0 0; padding: 0; list-style: none; }
.proof li { border-left: 4px solid var(--c, var(--green)); padding: 0.1rem 0 0.1rem 0.9rem; }
.proof b { display: block; font-family: var(--font-head); font-size: 2rem; font-weight: 600; line-height: 1.1; color: var(--ink); margin-bottom: 0.3rem; }
.proof span { color: var(--graphite); font-size: 0.98rem; line-height: 1.5; }

/* ---- alternating feature rows ---- */
.rows { padding: 0 0.75rem; max-width: calc(var(--maxw) + 1.5rem); }
.feature { display: grid; grid-template-columns: 1.15fr 1fr; gap: 3rem; align-items: center; padding: 2rem; margin: 0 0 1rem; }
@media (max-width: 700px) { .rows { padding: 0; } .feature { margin: 0 auto 1rem; width: calc(100% - 1.5rem); padding: 1.2rem; } }
.feature.flip > :first-child { order: 2; }
.feature h2 { font-size: clamp(1.5rem, 2.7vw, 2rem); }
.feature p { color: var(--graphite); max-width: 56ch; }
.feature .media { border-radius: var(--r); overflow: hidden; background: #fff; border: 1px solid var(--hair); }
.feature .media img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; }
.feature .media.contain img { object-fit: contain; }
.feature .more { font-weight: 600; }
@media (max-width: 900px) { .feature, .feature.flip { grid-template-columns: 1fr; gap: 1.3rem; } .feature.flip > :first-child { order: 0; } }

/* ---- cards (inner pages) ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.3rem; margin-top: 1.6rem; }
.card { display: flex; flex-direction: column; background: var(--tile); border: 1px solid var(--hair); border-radius: var(--r); overflow: hidden; color: inherit; text-decoration: none; }
@media (prefers-color-scheme: dark) { .card { background: var(--panel); } }
a.card:hover { border-color: var(--green); }
.card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #fff; }
.card .card-body { padding: 1rem 1.15rem 1.25rem; }
.card h3 { margin: 0 0 0.35rem; font-size: 1.2rem; }
.card p { margin: 0; color: var(--graphite); font-size: 0.98rem; line-height: 1.5; }
.card .more { display: inline-block; margin-top: 0.7rem; font-weight: 600; color: var(--green); }

/* ---- figures + galleries ---- */
figure { margin: 0; }
.shot { display: block; width: 100%; padding: 0; border: 1px solid var(--hair); border-radius: var(--r); background: #fff; overflow: hidden; cursor: default; }
.js .shot { cursor: zoom-in; }   /* only promise zoom when the lightbox script runs */
.shot img { display: block; width: 100%; height: auto; }
figcaption { margin-top: 0.55rem; color: var(--graphite); font-size: 0.95rem; line-height: 1.5; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.3rem 1rem; margin-top: 1.4rem; align-items: start; }
.gallery .shot img { aspect-ratio: 4 / 3; object-fit: contain; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 2.6rem; align-items: start; }
.split.text-first { grid-template-columns: 1.1fr 1fr; }
@media (max-width: 900px) { .split, .split.text-first { grid-template-columns: 1fr; gap: 1.6rem; } }

/* real sequences only (idea to part, display rebuild) */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; margin: 1.6rem 0 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { counter-increment: step; }
.steps .shot img { aspect-ratio: 4 / 3; object-fit: cover; }
.steps figcaption::before { content: counter(step) ". "; font-weight: 700; color: var(--green); }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }

/* ---- case-study entries ---- */
.entry { padding: 2.6rem 0; }
.entry:first-of-type { padding-top: 0.6rem; }
.entry h2 { font-size: 1.55rem; }
.facts { margin: 1rem 0 0; padding: 0; list-style: none; }
.facts li { padding: 0.4rem 0; border-bottom: 1px solid var(--hair); }
.facts b { font-weight: 600; margin-right: 0.6rem; }

/* ---- reviews ---- */
.reviews { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 1.4rem; margin-top: 1.6rem; }
.review { margin: 0; padding: 1.4rem 1.5rem; background: var(--tile); border-radius: var(--r); border: 1px solid var(--hair); }
@media (prefers-color-scheme: dark) { .review { background: var(--panel); } }
.review .stars { display: block; color: var(--gold); font-size: 1.15rem; letter-spacing: 0.12em; margin-bottom: 0.6rem; }
.review p { margin: 0 0 0.8rem; }
.review footer { color: var(--graphite); font-size: 0.95rem; }

/* ---- buttons ---- */
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0 0; }
.btn { display: inline-block; padding: 0.75rem 1.25rem; border: 1.5px solid var(--ink); border-radius: var(--r); color: var(--ink);
  font-weight: 600; font-size: 1rem; text-decoration: none; background: transparent; }
.btn:hover { background: var(--panel); }
.btn-primary { background: var(--green); border-color: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green); filter: brightness(1.08); }
@media (prefers-color-scheme: dark) { .btn-primary { color: #0f1a14; } }

/* ---- spec table ---- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.spec { width: 100%; max-width: 820px; min-width: 520px; border-collapse: collapse; margin: 1.2rem 0; }
.spec th, .spec td { text-align: left; padding: 0.65rem 0.9rem 0.65rem 0; border-bottom: 1px solid var(--hair); vertical-align: top; }
.spec th { font-weight: 600; color: var(--graphite); }

/* ---- glossary terms ---- */
.term { color: inherit; text-decoration: underline dotted; text-decoration-color: var(--green); text-underline-offset: 0.22em; text-decoration-thickness: 1.5px; cursor: help; }
.term-pop { position: absolute; z-index: 40; max-width: 330px; padding: 0.8rem 0.95rem; background: var(--ink); color: var(--paper);
  border-radius: var(--r); font-size: 0.93rem; line-height: 1.45; box-shadow: 0 8px 28px rgba(20,22,24,0.28); }
.term-pop b { display: block; font-family: var(--font-head); font-size: 1.02rem; margin-bottom: 0.2rem; }
.term-pop .term-more { display: block; margin-top: 0.45rem; font-size: 0.82rem; opacity: 0.75; }
.glossary dt { font-family: var(--font-head); font-weight: 600; font-size: 1.15rem; margin-top: 1.3rem; scroll-margin-top: 5.5rem; padding: 0.15rem 0.45rem; margin-left: -0.45rem; border-radius: var(--r); }
.glossary dd { margin: 0.2rem 0 0; max-width: var(--measure); }
.glossary dt:target { background: var(--green-soft); }
.glossary dt:target + dd { background: var(--green-soft); padding: 0.4rem 0.6rem; margin-left: -0.6rem; border-radius: var(--r); }

/* ---- footer ---- */
.site-footer { padding: 0.5rem 0 2rem; font-size: 0.98rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1.45fr repeat(3, 1fr) 1.3fr; gap: 1.8rem; }
.site-footer .phone-link { white-space: nowrap; }   /* never split the phone number */
@media (max-width: 1150px) and (min-width: 901px) { .footer-grid { grid-template-columns: repeat(3, 1fr); } .footer-brand { grid-column: 1 / -1; } }
.footer-brand .brand { margin: 0 0 0.9rem; white-space: nowrap; }
.footer-brand p { color: var(--graphite); max-width: 32ch; margin: 0; }
.site-footer h2 { font-family: var(--font); font-size: 0.95rem; font-weight: 600; color: var(--graphite); margin: 0 0 0.8rem; letter-spacing: 0; }
.site-footer nav a, .site-footer .contact a { display: block; color: var(--ink); text-decoration: none; padding: 0.22rem 0; }
.site-footer nav a:hover, .site-footer .contact a:hover { color: var(--green); }
.site-footer .contact p { color: var(--graphite); margin: 0.4rem 0 0; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem 2rem; margin-top: 2.4rem; padding-top: 1.2rem;
  border-top: 1px solid var(--hair); color: var(--graphite); font-size: 0.92rem; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }

/* ---- lightbox ---- */
.lb { position: fixed; inset: 0; z-index: 60; display: none; flex-direction: column; align-items: center; justify-content: center; gap: 0.9rem; padding: 1.5rem;
  background: rgba(16,18,20,0.92); cursor: zoom-out; }
.lb.open { display: flex; }
.lb img { max-width: 100%; max-height: calc(100% - 7rem); background: #fff; border-radius: var(--r); }
.lb-cap { max-width: 72ch; margin: 0; color: #eceeeb; font-size: 1rem; line-height: 1.5; text-align: center; }
.lb-hint { margin: 0; color: #a3a9b0; font-size: 0.85rem; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }