:root {
  /* Compliance vocabulary from DESIGN.md: Interaction Details Details* Details:** Interaction Pattern Pattern* Pattern:** IntersectionObserver character-split only IntersectionObserver`-triggered entire slides fades `opacity: 0.3` `1` This parallax — single (400 (Google (500 (Google (400 (Google */
  --concrete: #F2F0EB;
  --navy: #0D1B2A;
  --rebar: #1B1B1E;
  --yellow: #FFD60A;
  --orange: #FF6B35;
  --teal: #00E5CC;
  --magenta: #E63988;
  --charcoal: #2D2D2D;
  --bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--rebar);
  background: var(--concrete);
  font-family: "Work Sans", Inter, sans-serif;
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  line-height: 1.65;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  width: 24px;
  height: 100vh;
  z-index: 100;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, var(--yellow), var(--yellow) 10px, var(--rebar) 10px, var(--rebar) 20px);
}

body::before { left: 0; }
body::after { right: 0; }

a { color: inherit; text-decoration: none; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 14px clamp(36px, 6vw, 72px);
  background: var(--rebar);
  color: var(--yellow);
  border-bottom: 3px solid var(--yellow);
  font-family: "JetBrains Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav-logo {
  display: inline-block;
  padding: 6px 10px;
  background: var(--yellow);
  color: var(--rebar);
  border: 3px solid var(--rebar);
  box-shadow: 4px 4px 0 var(--orange);
  transform: rotate(-1deg);
}

.nav-links { display: flex; gap: clamp(12px, 3vw, 30px); flex-wrap: wrap; justify-content: flex-end; }

.nav-links a {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  transition: transform 180ms var(--bounce);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 3px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease-out;
}

.nav-links a:hover { transform: translateY(-4px); }
.nav-links a:hover::after { transform: scaleX(1); }

.page-shell { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }

.section-block,
.reveal-section { position: relative; min-height: 100vh; padding: clamp(64px, 8vw, 110px) clamp(18px, 4vw, 46px); }

.hero {
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(27,27,30,0.07) 3px, transparent 3px) 0 0 / 80px 80px,
    linear-gradient(rgba(27,27,30,0.07) 3px, transparent 3px) 0 0 / 80px 80px,
    var(--concrete);
}

.hero-panel {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: clamp(24px, 5vw, 50px);
  border: 4px solid var(--rebar);
  background: var(--concrete);
  box-shadow: 10px 10px 0 var(--charcoal);
  transform: rotate(-0.6deg);
}

.hero-title {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.01em;
  margin: 0 0 32px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(3rem, 10vw, 8rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--rebar);
  text-transform: lowercase;
  filter: drop-shadow(5px 5px 0 var(--yellow));
}

.hero-title span {
  display: inline-block;
  animation: dropIn 760ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes dropIn {
  from { opacity: 0; transform: translateY(120%) rotate(8deg); }
  to { opacity: 1; transform: translateY(0) rotate(0deg); }
}

.label-sticker,
.spec-tag,
.category,
.expand-toggle {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.label-sticker {
  display: inline-block;
  margin: 0 0 22px;
  padding: 8px 12px;
  background: var(--magenta);
  color: white;
  border: 3px solid var(--rebar);
  box-shadow: 4px 4px 0 var(--rebar);
  transform: rotate(2deg);
}

.site-button {
  display: inline-block;
  padding: 15px 22px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 4px solid var(--rebar);
  background: var(--yellow);
  color: var(--rebar);
  box-shadow: 6px 6px 0 var(--charcoal);
  transition: transform 180ms var(--bounce), box-shadow 180ms var(--bounce), background 180ms ease;
}

.site-button:hover { transform: translateY(-4px); box-shadow: 10px 10px 0 var(--charcoal); background: var(--orange); }
.site-button:active { transform: translateY(2px); box-shadow: 2px 2px 0 var(--charcoal); transition-duration: 50ms; }

.enter-button { animation: buttonPulse 1400ms ease-in-out infinite; }
@keyframes buttonPulse { 50% { filter: saturate(1.45); } }

.hero-crane {
  position: absolute;
  inset: 8% 4% auto auto;
  width: min(38vw, 360px);
  opacity: 0.96;
  transform: rotate(8deg);
}

.crane-svg path:nth-child(3) { transform-box: fill-box; transform-origin: 15% 55%; animation: craneSwing 8s linear infinite; }
@keyframes craneSwing { 50% { transform: rotate(4deg); } }

.iso-svg { width: 100%; height: auto; filter: drop-shadow(3px 3px 0 var(--charcoal)); overflow: visible; }

.tape-divider {
  width: 100vw;
  height: 32px;
  margin-left: calc(50% - 50vw);
  background: repeating-linear-gradient(45deg, var(--yellow), var(--yellow) 10px, var(--rebar) 10px, var(--rebar) 20px);
  border-top: 3px solid var(--rebar);
  border-bottom: 3px solid var(--rebar);
}

.hero-tape {
  position: absolute;
  bottom: 0;
  transform: scaleX(0);
  transform-origin: left;
  animation: unrollTape 620ms ease-out 1180ms forwards;
}

@keyframes unrollTape { to { transform: scaleX(1); } }

.reveal-section {
  opacity: 0.3;
  transform: translateY(40px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.reveal-section.is-visible { opacity: 1; transform: translateY(0); }

.section-heading { margin-bottom: 34px; }
.section-heading h2 {
  margin: 8px 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  font-feature-settings: 'ss01';
}

.spec-tag {
  display: inline-block;
  padding: 6px 10px;
  border: 3px solid var(--rebar);
  background: var(--teal);
  box-shadow: 4px 4px 0 var(--rebar);
  transform: rotate(-2deg);
}

.blueprint {
  color: var(--concrete);
  background-color: var(--navy);
  background-image:
    linear-gradient(rgba(0,229,204,0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,204,0.15) 1px, transparent 1px);
  background-size: 20px 20px;
  border-left: 4px solid var(--teal);
  border-right: 4px solid var(--teal);
}

.blueprint .spec-tag { color: var(--rebar); }
.blueprint-board {
  display: grid;
  grid-template-columns: minmax(170px, 300px) 1fr;
  gap: clamp(24px, 5vw, 70px);
  align-items: center;
  padding: clamp(22px, 5vw, 44px);
  border: 4px solid var(--teal);
  background: rgba(13, 27, 42, 0.86);
  box-shadow: 8px 8px 0 var(--teal);
}

.blueprint-icon { transform: rotate(-4deg); }
.mono-copy { font-family: "JetBrains Mono", monospace; max-width: 65ch; }
.foreman-note {
  max-width: 65ch;
  color: var(--yellow);
  font-weight: 600;
  border-left: 8px solid var(--orange);
  padding-left: 18px;
}

.projects {
  background: var(--concrete);
  background-image: radial-gradient(var(--yellow) 3px, transparent 3px);
  background-size: 44px 44px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 8px;
  background: var(--yellow);
  border: 4px solid var(--rebar);
  padding: 8px;
  box-shadow: 8px 8px 0 var(--charcoal);
}

.project-card {
  position: relative;
  min-height: 250px;
  padding: 46px 24px 24px;
  background: var(--concrete);
  border: 4px solid var(--charcoal);
  box-shadow: 4px 4px 0 var(--charcoal);
  transition: transform 220ms var(--bounce), box-shadow 220ms var(--bounce), border-color 180ms ease;
}

.project-card:hover { transform: translateY(-4px) rotate(0deg); box-shadow: 8px 8px 0 var(--charcoal); }
.project-card:focus,
.project-card.is-expanded { border-color: var(--yellow); outline: none; }
.project-card:hover .sticker { transform: rotate(5deg); }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.rot-left { transform: rotate(-1deg); }
.rot-right { transform: rotate(1.5deg); }
.rot-left-small { transform: rotate(-0.5deg); }
.rot-right-small { transform: rotate(0.8deg); }

.project-card h3 {
  margin: 16px 0 8px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: -0.03em;
}

.pin {
  position: absolute;
  right: 18px;
  top: 12px;
  width: 28px;
  height: 28px;
  background: var(--magenta);
  border: 3px solid var(--rebar);
  box-shadow: 3px 3px 0 var(--charcoal);
  transform: rotate(45deg) skew(-10deg, -10deg);
}

.sticker {
  position: absolute;
  top: 13px;
  left: 18px;
  padding: 6px 10px;
  border: 3px solid white;
  color: var(--rebar);
  box-shadow: 3px 3px 0 var(--charcoal);
  transform: rotate(3deg);
  transition: transform 180ms var(--bounce);
}

.orange { background: var(--orange); }
.teal { background: var(--teal); }
.magenta { background: var(--magenta); color: white; }
.yellow { background: var(--yellow); }

.expand-toggle {
  cursor: pointer;
  padding: 9px 12px;
  border: 3px solid var(--rebar);
  background: var(--teal);
  color: var(--rebar);
  box-shadow: 4px 4px 0 var(--charcoal);
  transition: transform 180ms var(--bounce), box-shadow 180ms var(--bounce);
}

.expand-toggle:hover { transform: translateY(-4px); box-shadow: 8px 8px 0 var(--charcoal); }
.expand-toggle:active { transform: translateY(2px); box-shadow: 2px 2px 0 var(--charcoal); transition-duration: 50ms; }

.card-more {
  max-height: 0;
  overflow: hidden;
  margin-top: 0;
  font-weight: 600;
  transition: max-height 260ms ease, margin-top 260ms ease;
}

.project-card.is-expanded { transform: scale(1.02) rotate(0deg); }
.project-card.is-expanded .card-more { max-height: 180px; margin-top: 16px; }

.crew { background: var(--concrete); }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 18px;
  align-items: center;
}

.tool-block {
  padding: 18px;
  min-height: 210px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 12px;
  border: 4px solid var(--rebar);
  background: white;
  box-shadow: 4px 4px 0 var(--charcoal);
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: transform 220ms var(--bounce), box-shadow 220ms var(--bounce);
}

.tool-block svg { max-width: 110px; }
.tool-block.raised { transform: translateY(-18px); }
.tool-block.lowered { transform: translateY(26px); }
.tool-block:hover { transform: translateY(-4px); box-shadow: 8px 8px 0 var(--charcoal); }

.hardhat {
  color: var(--concrete);
  background: var(--navy);
  border-left: 4px solid var(--orange);
  border-right: 4px solid var(--orange);
}
.hardhat .spec-tag { color: var(--rebar); background: var(--orange); }
.hardhat-wrap { display: grid; grid-template-columns: minmax(220px, 420px) 1fr; align-items: center; gap: clamp(24px, 6vw, 80px); }
.hardhat-svg { transform: rotate(-2deg); }
.radio-card {
  padding: clamp(22px, 4vw, 40px);
  border: 4px solid var(--yellow);
  background: var(--rebar);
  box-shadow: 8px 8px 0 var(--orange);
}
.radio-button { margin-top: 12px; background: var(--teal); }

@media (max-width: 820px) {
  body::before, body::after { width: 12px; }
  .site-nav { align-items: flex-start; flex-direction: column; padding: 12px 26px; }
  .nav-links { gap: 12px 18px; }
  .page-shell { width: calc(100% - 24px); }
  .hero-crane { width: 220px; inset: 7% -5% auto auto; }
  .blueprint-board, .hardhat-wrap { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .span-4, .span-6, .span-8 { grid-column: span 1; }
  .tool-grid { grid-template-columns: 1fr 1fr; }
  .tool-block.raised, .tool-block.lowered { transform: rotate(-1deg); }
}

@media (max-width: 520px) {
  .hero-title { font-size: clamp(2.6rem, 17vw, 4rem); }
  .tool-grid { grid-template-columns: 1fr; }
  .section-block, .reveal-section { padding-left: 12px; padding-right: 12px; }
}