/* ==========================================================
   DATUM — BIM Studio
   Design language: architectural drafting / blueprint.
   Ink navy + paper + blueprint-line cyan + safety amber.
   ========================================================== */

:root{
  --ink-900:#101C28;
  --ink-800:#16283A;
  --ink-700:#1D3752;
  --brand-blue:#0B3D82;
  --blue-bright:#2F6FD1;
  --blue-bright-dark:#21529E;
  --blue-pale:#8FB4E3;
  --paper:#ECEEF1;
  --paper-hi:#F6F7F9;
  --text-ink:#101923;
  --text-muted:#57626F;
  --text-on-dark:#D6DEE8;
  --text-on-dark-muted:#8B9CB1;
  --hairline:#D8DCE1;
  --hairline-dark:#29405C;

  --font-display:'Space Grotesk', system-ui, sans-serif;
  --font-body:'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:'IBM Plex Mono', 'SFMono-Regular', monospace;

  --wrap: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper-hi);
  color:var(--text-ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
h1,h2,h3{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.12;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
p{ margin:0 0 1em; color:var(--text-muted); max-width:62ch; }
.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 28px; }

.sr-only-heading{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}

:focus-visible{
  outline:2px solid var(--blue-bright);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

/* ---------- corner crop marks (drawing-sheet frame) ---------- */
.crop{
  position:fixed; width:22px; height:22px; z-index:60; pointer-events:none;
  border-color:var(--ink-900); opacity:0.35;
}
.crop-tl{ top:14px; left:14px; border-top:1.5px solid; border-left:1.5px solid; }
.crop-tr{ top:14px; right:14px; border-top:1.5px solid; border-right:1.5px solid; }
.crop-bl{ bottom:14px; left:14px; border-bottom:1.5px solid; border-left:1.5px solid; }
.crop-br{ bottom:14px; right:14px; border-bottom:1.5px solid; border-right:1.5px solid; }
@media (max-width:640px){ .crop{ display:none; } }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--font-body); font-weight:600; font-size:0.95rem;
  padding:13px 24px; border-radius:2px; text-decoration:none;
  border:1px solid transparent; cursor:pointer; transition:background .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
}
.btn-solid{ background:var(--blue-bright); color:#fff; }
.btn-solid:hover{ background:var(--blue-bright-dark); }
.btn-ghost{ border-color:currentColor; background:transparent; }
.hero .btn-ghost{ color:var(--text-on-dark); }
.hero .btn-ghost:hover{ background:rgba(255,255,255,.08); }
.btn-block{ width:100%; }
.btn:active{ transform:translateY(1px); }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(245,244,238,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--hairline);
}
.header-row{
  display:flex; align-items:center; gap:28px;
  height:76px;
}
.logo{ display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--ink-900); margin-right:auto; }
.logo-mark{ display:flex; align-items:center; }
.logo-mark img{ display:block; height:32px; width:auto; }
.logo-text{
  font-family:var(--font-display); font-weight:700; font-size:1.1rem; letter-spacing:.01em;
  display:flex; flex-direction:column; line-height:1.05;
}
.logo-text em{ font-family:var(--font-mono); font-style:normal; font-weight:400; font-size:.52rem; letter-spacing:.05em; color:var(--text-muted); text-transform:uppercase; margin-top:2px; }
.logo-text.small{ font-size:1.3rem; color:var(--paper-hi); }
.footer-logo{ display:flex; align-items:center; gap:12px; }
.footer-logo img{ display:block; }

.main-nav{ display:flex; gap:30px; }
.main-nav a{ text-decoration:none; font-size:.94rem; font-weight:500; color:var(--text-ink); position:relative; padding:6px 0; }
.main-nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:1.5px; background:var(--blue-bright);
  transform:scaleX(0); transform-origin:left; transition:transform .18s ease;
}
.main-nav a:hover::after{ transform:scaleX(1); }

.nav-toggle{ display:none; flex-direction:column; justify-content:center; gap:5px; width:34px; height:34px; background:none; border:none; cursor:pointer; }
.nav-toggle span{ display:block; height:1.6px; background:var(--ink-900); width:100%; }

@media (max-width: 880px){
  .main-nav{
    position:absolute; top:76px; left:0; right:0;
    background:var(--paper-hi); border-bottom:1px solid var(--hairline);
    flex-direction:column; padding:10px 28px 22px; gap:4px;
    display:none;
  }
  .main-nav.open{ display:flex; }
  .main-nav a{ padding:10px 0; border-bottom:1px solid var(--hairline); }
  .nav-cta{ display:none; }
  .nav-toggle{ display:flex; }
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:var(--ink-900);
  color:var(--text-on-dark);
  overflow:hidden;
  padding:64px 0 0;
}
.hero-grid{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(143,180,227,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143,180,227,.08) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 80% 60% at 30% 20%, black 20%, transparent 75%);
}
.hero-wrap{ position:relative; }

/* ---------- sheet tag / labels (drafting title-block references) ---------- */
.sheet-tag{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.08em;
  color:var(--text-muted); text-transform:uppercase;
  padding-bottom:10px; margin-bottom:22px; border-bottom:1px solid var(--hairline);
}
.sheet-tag.light{ color:var(--text-on-dark-muted); border-bottom-color:var(--hairline-dark); }

.hero-cols{
  display:grid; grid-template-columns:1.05fr 1fr; gap:40px; align-items:center;
  padding-bottom:40px;
}
.hero h1{
  font-size:clamp(2.1rem, 4.4vw, 3.4rem);
  color:#fff;
  max-width:12ch;
}
.hero-lede{ color:var(--text-on-dark-muted); font-size:1.05rem; max-width:46ch; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-top:8px; }

.hero-art{ position:relative; min-width:0; }
#hero-svg{ fill:none; width:100%; height:auto; display:block; }
#hero-svg .riser-fill{ fill:rgba(47,111,209,.22); }
#hero-svg .draw{
  stroke-dasharray:900;
  stroke-dashoffset:900;
  animation:draw-in 2.1s ease forwards;
}
#hero-svg .draw:nth-of-type(2n){ animation-delay:.15s; }
#hero-svg .draw:nth-of-type(3n){ animation-delay:.3s; }
@keyframes draw-in{ to{ stroke-dashoffset:0; } }

.stat-strip{
  display:grid; grid-template-columns:repeat(4,1fr); gap:0;
  border-top:1px solid var(--hairline-dark);
  margin:0; padding:26px 0 40px;
}
.stat-strip > div{ padding:0 22px; border-left:1px solid var(--hairline-dark); }
.stat-strip > div:first-child{ border-left:none; padding-left:0; }
.stat-strip dt{ font-family:var(--font-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-on-dark-muted); margin-bottom:6px; }
.stat-strip dd{ margin:0; font-family:var(--font-display); font-size:1.6rem; font-weight:600; color:var(--blue-pale); }

@media (max-width:880px){
  .hero-cols{ grid-template-columns:1fr; }
  .hero-art{ order:-1; max-width:420px; margin:0 auto; }
  .stat-strip{ grid-template-columns:repeat(2,1fr); row-gap:22px; }
  .stat-strip > div:nth-child(3){ border-left:none; padding-left:0; }
}

/* ---------- generic section ---------- */
.section{ padding:96px 0; }
.section-dark{ background:var(--ink-900); color:var(--text-on-dark); }
.section-dark p{ color:var(--text-on-dark-muted); }
.section-dark h2{ color:#fff; }
.section-alt{ background:var(--paper); }

.section-head{ max-width:760px; margin-bottom:56px; }
.section-head h2{ font-size:clamp(1.6rem, 3vw, 2.2rem); }
.section-lede{ font-size:1.05rem; }
.section-lede.light{ color:var(--text-on-dark-muted); }

/* ---------- services ---------- */
.service-grid{
  display:grid; grid-template-columns:repeat(4, 1fr); gap:1px;
  background:var(--hairline);
  border:1px solid var(--hairline);
}
.service-card{
  background:var(--paper-hi);
  padding:30px 26px 32px;
  position:relative;
}
.s-icon{ width:34px; height:34px; color:var(--brand-blue); margin-bottom:18px; }
.service-card h3{ font-size:1.05rem; margin-bottom:.4em; }
.service-card p{ font-size:.92rem; margin-bottom:0; }

@media (max-width:980px){ .service-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ .service-grid{ grid-template-columns:1fr; } }

/* ---------- process ---------- */
.process-steps{
  list-style:none; margin:0; padding:8px 0 0;
  display:grid; grid-template-columns:repeat(3,1fr); column-gap:48px; row-gap:48px;
}
.step{ position:relative; min-width:0; }
.step:not(:nth-child(3n))::after{
  content:"→"; position:absolute; top:8px; right:-32px;
  color:var(--hairline-dark); font-size:1.1rem; line-height:1;
}
.step-badge{
  display:flex; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:50%;
  font-family:var(--font-mono); font-weight:600; font-size:.95rem;
  margin-bottom:18px; color:#fff;
}
.step:nth-child(1) .step-badge{ background:var(--ink-800); border:1px solid var(--hairline-dark); }
.step:nth-child(2) .step-badge{ background:var(--ink-700); }
.step:nth-child(3) .step-badge{ background:var(--brand-blue); }
.step:nth-child(4) .step-badge{ background:#1E58A8; }
.step:nth-child(5) .step-badge{ background:var(--blue-bright); }
.step:nth-child(6) .step-badge{ background:var(--blue-pale); color:var(--ink-900); }
.step h3{ color:#fff; font-size:1.08rem; margin-bottom:.4em; }
.step p{ font-size:.92rem; margin-bottom:16px; }
.step-image{
  background:var(--ink-800); border:1px solid var(--hairline-dark); border-radius:2px;
  padding:8px; margin-bottom:18px; line-height:0;
}
.step-image img{ width:100%; height:auto; display:block; }
.step-checklist{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px; }
.step-checklist li{
  font-size:.84rem; color:var(--text-on-dark-muted); padding-left:22px; position:relative;
}
.step-checklist li::before{
  content:"✓"; position:absolute; left:0; top:0;
  color:var(--blue-pale); font-weight:700; font-size:.82rem;
}

@media (max-width:980px){
  .process-steps{ grid-template-columns:1fr 1fr; column-gap:32px; row-gap:40px; }
  .step:not(:nth-child(3n))::after{ display:none; }
}
@media (max-width:640px){
  .process-steps{ grid-template-columns:1fr; }
}

/* ---------- spec table ---------- */
.spec-table{ border-top:1px solid var(--hairline); }
.spec-row{
  display:grid; grid-template-columns:220px 1fr; gap:24px;
  padding:20px 0; border-bottom:1px solid var(--hairline);
}
.spec-key{ font-family:var(--font-mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-muted); padding-top:2px; }
.spec-val{ font-size:1rem; color:var(--text-ink); }
@media (max-width:640px){ .spec-row{ grid-template-columns:1fr; gap:6px; } }

/* ---------- work / portfolio ---------- */
.work-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--hairline); border:1px solid var(--hairline); }
.work-card{ background:var(--paper-hi); padding:0; display:flex; flex-direction:column; }
.work-svg{ width:100%; height:auto; display:block; }
.work-svg{ padding:0; }
.work-meta{ padding:22px 26px 28px; border-top:1px solid var(--hairline); }
.work-meta h3{ font-size:1.1rem; margin-bottom:.25em; }
.work-tags{ font-family:var(--font-mono); font-size:.78rem; color:var(--brand-blue); text-transform:uppercase; letter-spacing:.04em; margin-bottom:16px; }
.work-specs{ display:flex; gap:26px; margin:0; }
.work-specs dt{ font-family:var(--font-mono); font-size:.68rem; text-transform:uppercase; color:var(--text-muted); margin-bottom:3px; }
.work-specs dd{ margin:0; font-weight:600; font-size:.92rem; }

@media (max-width:640px){ .work-grid{ grid-template-columns:1fr; } .work-specs{ flex-wrap:wrap; row-gap:10px; } }

/* ---------- testimonials ---------- */
.quote-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:36px; }
.quote-card{ margin:0; padding-top:20px; border-top:2px solid var(--brand-blue); }
.quote-card blockquote{ margin:0 0 18px; font-family:var(--font-display); font-size:1.08rem; color:var(--text-ink); line-height:1.4; }
.quote-card figcaption{ font-family:var(--font-mono); font-size:.78rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:.03em; }
@media (max-width:880px){ .quote-grid{ grid-template-columns:1fr; gap:40px; } }

/* ---------- CTA band ---------- */
.cta-band{ background:var(--brand-blue); }
.cta-wrap{
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding:56px 28px; flex-wrap:wrap;
}
.cta-band h2{ color:#fff; font-size:clamp(1.4rem,3vw,2rem); margin:0; max-width:16ch; }
.cta-band .btn-solid{ background:#fff; color:var(--brand-blue); }
.cta-band .btn-solid:hover{ background:var(--paper); }

/* ---------- contact ---------- */
.contact-wrap{ display:grid; grid-template-columns:1fr 1fr; gap:64px; }
.title-block{ margin-top:32px; display:grid; gap:16px; }
.title-block > div{ display:flex; gap:14px; border-bottom:1px solid var(--hairline-dark); padding-bottom:12px; }
.title-block dt{ font-family:var(--font-mono); font-size:.72rem; text-transform:uppercase; color:var(--text-on-dark-muted); width:70px; flex-shrink:0; padding-top:2px; }
.title-block dd{ margin:0; font-size:1rem; }
.title-block a{ text-decoration:none; border-bottom:1px solid var(--blue-pale); }

.contact-form{ display:flex; flex-direction:column; gap:18px; }
.field-row{ display:flex; flex-direction:column; gap:7px; }
.field-row label{ font-family:var(--font-mono); font-size:.75rem; text-transform:uppercase; letter-spacing:.05em; color:var(--text-on-dark-muted); }
.field-row input, .field-row select, .field-row textarea{
  background:var(--ink-800); border:1px solid var(--hairline-dark); color:#fff;
  padding:12px 14px; font-family:var(--font-body); font-size:.98rem; border-radius:2px;
  resize:vertical;
}
.field-row input:focus, .field-row select:focus, .field-row textarea:focus{ border-color:var(--blue-pale); outline:none; }
.form-note{ font-size:.88rem; color:var(--blue-pale); min-height:1.2em; margin:0; }

@media (max-width:880px){ .contact-wrap{ grid-template-columns:1fr; gap:40px; } }

/* ---------- footer ---------- */
.site-footer{ background:var(--ink-900); color:var(--text-on-dark-muted); padding:64px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:32px; padding-bottom:48px; border-bottom:1px solid var(--hairline-dark); align-items:start; }
.footer-brand p{ color:var(--text-on-dark-muted); font-size:.92rem; margin-top:10px; }
.footer-col h4{ font-family:var(--font-mono); font-size:.75rem; text-transform:uppercase; letter-spacing:.05em; color:#fff; margin:0 0 14px; font-weight:500; }
.footer-col{ display:flex; flex-direction:column; gap:10px; }
.footer-col a{ text-decoration:none; color:var(--text-on-dark-muted); font-size:.92rem; }
.footer-col a:hover{ color:var(--blue-pale); }
.footer-bottom{ display:flex; justify-content:space-between; padding:24px 28px; font-family:var(--font-mono); font-size:.78rem; flex-wrap:wrap; gap:10px; }

@media (max-width:760px){ .footer-grid{ grid-template-columns:1fr 1fr; } }