/* =========================================================
   POLYMETALL — design tokens
   A precision-engineering manufacturer's site, styled like
   the shop drawings and spec sheets the work itself produces:
   hairline rules, sheet/rev numbering, corner registration
   marks, dimension-style annotations for real stats.
   ========================================================= */

:root{
  --graphite:   #1B1E20;   /* near-black, warm undertone — ink on light, base on dark */
  --paper:      #F2F0EA;   /* drawing-paper surface */
  --paper-dim:  #E7E3D9;   /* slightly deeper paper, for alternating panels */
  --line:       #C9C2B4;   /* hairline / border, warm vellum grey */
  --line-dark:  #3A3D3A;   /* hairline on dark sections */
  --slate:      #5B6670;   /* secondary text, steel blue-grey */
  --copper:     #B1652E;   /* accent — literal metal tone, used sparingly */
  --copper-dim: #8C4E22;   /* hover / pressed state */

  --display:  'Big Shoulders', 'Arial Narrow', sans-serif;
  --body:     'IBM Plex Sans', -apple-system, sans-serif;
  --mono:     'IBM Plex Mono', 'Courier New', monospace;

  --max: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--graphite);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family:var(--display); font-weight:700; letter-spacing:0.01em; }

.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--copper);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.01ms !important; transition-duration:0.01ms !important; }
}

/* ---------------------------------------------------------
   Corner registration marks — used once per hero, echoes
   the crop/registration marks on a print-ready drawing sheet.
   --------------------------------------------------------- */
.reg-frame{
  position:relative;
  border:1px solid var(--line);
}
.reg-frame::before, .reg-frame::after,
.reg-frame .rc2, .reg-frame .rc3{
  content:"";
  position:absolute;
  width:14px; height:14px;
  border-color:var(--copper);
  border-style:solid;
}
.reg-frame::before{ top:-1px; left:-1px; border-width:2px 0 0 2px; }
.reg-frame::after{ top:-1px; right:-1px; border-width:2px 2px 0 0; }
.reg-frame .rc2{ bottom:-1px; left:-1px; border-width:0 0 2px 2px; }
.reg-frame .rc3{ bottom:-1px; right:-1px; border-width:0 2px 2px 0; }

/* ---------------------------------------------------------
   Header
   --------------------------------------------------------- */
.site-header{
  position:sticky; top:0; z-index:40;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header .bar{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:18px; padding-bottom:18px;
}
.brand{ display:flex; align-items:center; }
.brand-logo{ height:48px; width:auto; display:block; }
@media (max-width:480px){ .brand-logo{ height:38px; } }
.main-nav ul{ display:flex; gap:2px; }
.main-nav a{
  display:block;
  font-family:var(--mono);
  font-size:0.78rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:10px 16px;
  border-bottom:2px solid transparent;
  color:var(--slate);
}
.main-nav a:hover{ color:var(--graphite); }
.main-nav a.active{ color:var(--graphite); border-bottom-color:var(--copper); }
.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line); padding:8px 10px;
  font-family:var(--mono); font-size:0.75rem; letter-spacing:0.08em; text-transform:uppercase;
  cursor:pointer;
}

@media (max-width: 780px){
  .nav-toggle{ display:inline-block; }
  .main-nav{
    position:absolute; left:0; right:0; top:100%;
    background:var(--paper); border-bottom:1px solid var(--line);
    display:none;
  }
  .main-nav.open{ display:block; }
  .main-nav ul{ flex-direction:column; padding:8px var(--gutter) 18px; }
  .main-nav a{ padding:12px 0; border-bottom:1px solid var(--line); }
  .site-header{ position:relative; }
}

/* ---------------------------------------------------------
   Sheet meta strip — a running "title block" callback that
   appears at the top of every interior page: sheet no., the
   section you're in, revision date. Real info, not decor.
   --------------------------------------------------------- */
.sheet-meta{
  border-bottom:1px solid var(--line);
  font-family:var(--mono);
  font-size:0.7rem;
  letter-spacing:0.06em;
  color:var(--slate);
  text-transform:uppercase;
}
.sheet-meta .wrap{
  display:flex; justify-content:space-between; gap:16px;
  padding-top:10px; padding-bottom:10px;
  flex-wrap:wrap;
}

/* ---------------------------------------------------------
   Hero
   --------------------------------------------------------- */
.hero{ padding-top:56px; padding-bottom:56px; }
.hero-frame{ padding:clamp(32px,6vw,72px) clamp(24px,6vw,64px); }
.hero-kicker{
  font-family:var(--mono); font-size:0.78rem; letter-spacing:0.1em;
  color:var(--copper); text-transform:uppercase; margin-bottom:18px;
}
.hero h1{
  font-size:clamp(2.4rem, 6vw, 4.4rem);
  line-height:0.98;
  max-width:19ch;
}
.hero .lede{
  margin-top:22px; max-width:60ch;
  font-size:1.05rem; color:var(--slate);
}
.hero-actions{ margin-top:32px; display:flex; gap:14px; flex-wrap:wrap; }

.btn{
  display:inline-block;
  font-family:var(--mono); font-size:0.78rem; letter-spacing:0.08em; text-transform:uppercase;
  padding:13px 24px;
  border:1px solid var(--graphite);
}
.btn-solid{ background:var(--copper); border-color:var(--copper); color:var(--paper); }
.btn-solid:hover{ background:var(--copper-dim); border-color:var(--copper-dim); }
.btn-line{ background:transparent; color:var(--graphite); }
.btn-line:hover{ background:var(--graphite); color:var(--paper); }

/* ---------------------------------------------------------
   Dimension stat row — numbers rendered like callouts on a
   drawing, with tick marks either side instead of card boxes.
   --------------------------------------------------------- */
.dim-row{
  display:grid; grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
}
.dim{
  padding:26px 18px; text-align:center;
  border-left:1px solid var(--line);
  position:relative;
}
.dim:first-child{ border-left:none; }
.dim .n{ font-family:var(--display); font-size:clamp(1.8rem,4vw,2.6rem); color:var(--copper); }
.dim .l{ font-family:var(--mono); font-size:0.68rem; letter-spacing:0.08em; color:var(--slate); text-transform:uppercase; margin-top:6px; }

@media (max-width:640px){
  .dim-row{ grid-template-columns:repeat(2,1fr); }
  .dim:nth-child(3){ border-left:none; }
}

/* ---------------------------------------------------------
   Section rhythm
   --------------------------------------------------------- */
section{ padding-top:64px; padding-bottom:64px; }
section.alt{ background:var(--paper-dim); }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end; gap:24px;
  border-bottom:1px solid var(--line); padding-bottom:18px; margin-bottom:40px;
  flex-wrap:wrap;
}
.section-head h2{ font-size:clamp(1.8rem,3.4vw,2.6rem); }
.section-head .idx{ font-family:var(--mono); font-size:0.75rem; color:var(--slate); letter-spacing:0.08em; }

/* ---------------------------------------------------------
   Panels — flat, hairline-bordered, sharp corners.
   --------------------------------------------------------- */
.panel-grid{ display:grid; gap:1px; background:var(--line); border:1px solid var(--line); }
.panel{ background:var(--paper); padding:32px; }
.panel .tag{ font-family:var(--mono); font-size:0.68rem; letter-spacing:0.08em; color:var(--copper); text-transform:uppercase; }
.panel h3{ font-size:1.35rem; margin-top:10px; }
.panel .icon{ width:44px; height:44px; margin-bottom:18px; }
.panel p{ color:var(--slate); margin-top:12px; font-size:0.96rem; }
.panel ol{ margin-top:14px; padding-left:1.1em; color:var(--slate); font-size:0.9rem; font-family:var(--mono); }
.panel ol li{ margin-bottom:5px; }

.cols-3{ grid-template-columns:repeat(3,1fr); }
.cols-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:900px){ .cols-3{ grid-template-columns:1fr; } .cols-2{ grid-template-columns:1fr; } }

/* ---------------------------------------------------------
   Prose block
   --------------------------------------------------------- */
.prose{ max-width:66ch; color:var(--slate); font-size:1.02rem; }
.prose p + p{ margin-top:16px; }
.prose strong{ color:var(--graphite); }

.two-col{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:start; }
@media (max-width:860px){ .two-col{ grid-template-columns:1fr; gap:36px; } }

/* ---------------------------------------------------------
   Materials strip (About) — three verticals as a legend
   --------------------------------------------------------- */
.legend{ display:flex; gap:0; border:1px solid var(--line); }
.legend div{ flex:1; padding:20px; border-left:1px solid var(--line); }
.legend div:first-child{ border-left:none; }
.legend .sw{ width:20px; height:20px; margin-bottom:12px; }
.legend h4{ font-size:1rem; }
.legend p{ margin-top:6px; font-size:0.85rem; color:var(--slate); }
@media (max-width:700px){ .legend{ flex-direction:column; } .legend div{ border-left:none; border-top:1px solid var(--line); } .legend div:first-child{ border-top:none; } }

/* ---------------------------------------------------------
   Projects — drawing-sheet placeholders
   --------------------------------------------------------- */
.proj-card{ background:var(--paper); border:1px solid var(--line); }
.proj-swatch{
  aspect-ratio:4/3; border-bottom:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 23px, var(--line) 24px),
    repeating-linear-gradient(90deg, transparent, transparent 23px, var(--line) 24px);
  background-size:24px 24px;
}
.proj-swatch svg{ width:56%; height:56%; opacity:0.9; }
.proj-body{ padding:22px; }
.proj-body .tag{ font-family:var(--mono); font-size:0.66rem; color:var(--copper); letter-spacing:0.08em; text-transform:uppercase; }
.proj-body h3{ font-size:1.1rem; margin-top:8px; }
.proj-body p{ font-size:0.88rem; color:var(--slate); margin-top:8px; }

/* ---------------------------------------------------------
   Contact
   --------------------------------------------------------- */
.contact-block{ border:1px solid var(--line); padding:34px; }
.contact-block h3{ font-size:1.1rem; margin-bottom:18px; }
.contact-line{ display:flex; gap:12px; padding:12px 0; border-top:1px solid var(--line); font-size:0.94rem; }
.contact-line:first-of-type{ border-top:none; }
.contact-line .k{ font-family:var(--mono); font-size:0.68rem; color:var(--slate); text-transform:uppercase; letter-spacing:0.08em; width:90px; flex:none; padding-top:2px; }

form.spec-form{ display:flex; flex-direction:column; gap:18px; }
.field{ display:flex; flex-direction:column; gap:8px; }
.field label{ font-family:var(--mono); font-size:0.68rem; letter-spacing:0.08em; text-transform:uppercase; color:var(--slate); }
.field input, .field textarea{
  border:1px solid var(--line); background:var(--paper);
  padding:12px 14px; font-family:var(--body); font-size:0.95rem; color:var(--graphite);
}
.field textarea{ resize:vertical; min-height:120px; }
.form-note{ font-size:0.8rem; color:var(--slate); }
.form-status{ font-family:var(--mono); font-size:0.8rem; padding:10px 0; }
.form-status.ok{ color:#3E6B4A; }
.form-status.err{ color:var(--copper-dim); }

.map-note{ border:1px solid var(--line); padding:18px; font-size:0.85rem; color:var(--slate); font-family:var(--mono); }

/* ---------------------------------------------------------
   Footer — the title block. Sheet number, company, revision.
   --------------------------------------------------------- */
.site-footer{ border-top:1px solid var(--line-dark); background:var(--graphite); color:var(--paper); }
.site-footer .wrap{ padding-top:44px; padding-bottom:28px; }
.foot-grid{ display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:40px; border-bottom:1px solid var(--line-dark); padding-bottom:32px; }
@media (max-width:780px){ .foot-grid{ grid-template-columns:1fr; gap:28px; } }
.foot-grid h5{ font-family:var(--mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--copper); margin-bottom:14px; }
.foot-grid p, .foot-grid a{ font-size:0.9rem; color:#C9CBC6; }
.foot-grid li{ margin-bottom:8px; }
.foot-bottom{ display:flex; justify-content:space-between; align-items:center; padding-top:18px; flex-wrap:wrap; gap:10px; }
.foot-bottom p{ font-family:var(--mono); font-size:0.7rem; letter-spacing:0.06em; color:#8F958E; text-transform:uppercase; }

/* page-load reveal: one deliberate moment, not per-card */
.hero-frame{ animation:sheet-in 0.6s ease-out; }
@keyframes sheet-in{
  from{ opacity:0; transform:translateY(10px); }
  to{ opacity:1; transform:translateY(0); }
}

.two-col-even{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
}
@media (max-width:860px){
  .two-col-even{ grid-template-columns:1fr; gap:36px; }
}
.svc-photo{
  width:100%;
  height:auto;
  border:1px solid var(--line);
  margin-bottom:20px;
  display:block;
}