:root {
  --graphite: #2A2E33;
  --graphite-deep: #1B1E22;
  --graphite-mid: #353A41;
  --signal: #F5C400;
  --signal-dark: #C79A00;
  --stencil: #F4F1E8;
  --concrete: #D9D5CC;
  --paper: #EDEAE3;
  --ink: #16181B;
  --muted: #8A9098;
  --line: #4A5058;
  --hair: #3A4048;
  --white: #F7F4EC;
  --stencil-font: "Stardos Stencil", "Arial Black", sans-serif;
  --display: "Oswald", "Arial Narrow", sans-serif;
  --body: "Source Sans 3", "Segoe UI", sans-serif;
  --max: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body {
  margin: 0;
  color: var(--stencil);
  background: var(--graphite-deep);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.55;
}
body.menu-open { overflow: hidden; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; letter-spacing: .02em; text-transform: uppercase; }
address { font-style: normal; }

.skip {
  position: fixed;
  z-index: 400;
  left: 12px;
  top: -80px;
  padding: 10px 16px;
  background: var(--signal);
  color: var(--ink);
  font-weight: 700;
}
.skip:focus { top: 12px; }

.yard-bar {
  position: sticky;
  top: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
  padding: 0 clamp(16px, 3vw, 40px);
  background: var(--graphite-deep);
  border-bottom: 4px solid var(--signal);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  width: max-content;
}
.brand-coupler {
  width: 42px;
  height: 28px;
  background: var(--signal);
  clip-path: polygon(0 28%, 18% 28%, 18% 8%, 42% 8%, 52% 0, 78% 12%, 100% 12%, 100% 88%, 78% 88%, 52% 100%, 42% 92%, 18% 92%, 18% 72%, 0 72%);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1; }
.brand-copy b {
  font-family: var(--display);
  font-size: 20px;
  letter-spacing: .12em;
}
.brand-copy small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.nav {
  display: flex;
  justify-content: center;
  align-self: stretch;
}
.nav a {
  display: grid;
  place-items: center;
  padding: 0 11px;
  text-decoration: none;
  font: 600 11px/1 var(--display);
  letter-spacing: .1em;
  text-transform: uppercase;
  border-left: 1px solid var(--hair);
  color: var(--concrete);
  white-space: nowrap;
}
.nav a:last-child { border-right: 1px solid var(--hair); }
.nav a:hover,
.nav a.active {
  background: var(--signal);
  color: var(--ink);
}
.bar-end { display: flex; align-items: center; gap: 12px; }
.langs { display: flex; border: 1px solid var(--line); }
.lang-btn {
  width: 40px;
  height: 30px;
  border: 0;
  background: transparent;
  color: var(--stencil);
  font: 700 12px var(--display);
  cursor: pointer;
}
.lang-btn.is-active {
  background: var(--signal);
  color: var(--ink);
}
.menu {
  display: none;
  width: 42px;
  height: 36px;
  border: 0;
  background: var(--signal);
  padding: 8px 10px;
  cursor: pointer;
}
.menu span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero,
.profile,
.codes,
.repair,
.limits,
.builder,
.contact,
footer {
  padding-left: clamp(18px, 5vw, 64px);
  padding-right: clamp(18px, 5vw, 64px);
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: 0;
  background:
    linear-gradient(180deg, var(--graphite-deep) 0, var(--graphite) 100%);
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 18px;
  background: repeating-linear-gradient(
    -45deg,
    var(--ink) 0 10px,
    var(--signal) 10px 20px
  );
}
.kicker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 18px;
  font: 600 12px/1 var(--display);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}
.signal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px var(--ink), 0 0 12px var(--signal);
}
.plate {
  font-style: normal;
  background: var(--stencil);
  color: var(--ink);
  padding: 3px 8px;
  font-family: var(--stencil-font);
  letter-spacing: .06em;
}
.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: .95;
  color: var(--white);
  max-width: 18ch;
}
.lede {
  max-width: 58ch;
  color: var(--concrete);
  font-size: clamp(16px, 1.2vw, 18.5px);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 20px;
  border: 2px solid var(--signal);
  text-decoration: none;
  font: 600 13px/1 var(--display);
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  color: var(--signal);
}
.btn.signal {
  background: var(--signal);
  color: var(--ink);
}
.btn.ghost {
  border-color: var(--line);
  color: var(--stencil);
}
.btn:hover { filter: brightness(1.08); }
.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 36px 0 56px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.hero-meta div {
  margin: 0;
  padding: 12px 14px;
  background: var(--graphite-mid);
}
.hero-meta dt {
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-meta dd {
  margin: 4px 0 0;
  font-family: var(--stencil-font);
  font-size: 18px;
  color: var(--white);
}

.yard-scene {
  position: relative;
  min-height: 460px;
  padding: 20px 20px 48px;
}
.req-sheet {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding: 22px 24px 28px;
  border: 2px solid var(--ink);
  box-shadow: 12px 12px 0 var(--ink);
  z-index: 2;
}
.req-sheet header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 3px solid var(--ink);
  padding-bottom: 8px;
  margin-bottom: 16px;
  font-family: var(--stencil-font);
}
.req-sheet header span { letter-spacing: .12em; }
.req-sheet header b { font-size: 28px; }
.req-sheet ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: tag;
}
.req-sheet li {
  counter-increment: tag;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed #b7b2a6;
  font-weight: 600;
}
.req-sheet li::before {
  content: counter(tag, decimal-leading-zero);
  font-family: var(--stencil-font);
  font-size: 22px;
  color: #6d6a62;
}
.sheet-stamp {
  position: absolute;
  right: 18px;
  bottom: 16px;
  font-family: var(--stencil-font);
  font-size: 42px;
  color: rgba(22, 24, 27, .14);
  transform: rotate(-8deg);
}
.coupler-block {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 28px;
  height: 110px;
}
.rail-profile {
  width: 36px;
  height: 110px;
  background: linear-gradient(90deg, #9aa0a8, #d7dbe0 42%, #6d737b);
  clip-path: polygon(18% 0, 82% 0, 82% 16%, 62% 20%, 62% 78%, 92% 84%, 92% 100%, 8% 100%, 8% 84%, 38% 78%, 38% 20%, 18% 16%);
  filter: drop-shadow(3px 4px 0 #111);
}
.rail-profile.mirror { transform: scaleX(-1); }
.coupler {
  width: 168px;
  height: 64px;
  background: var(--signal);
  clip-path: polygon(0 30%, 16% 30%, 16% 10%, 38% 10%, 48% 0, 70% 14%, 100% 14%, 100% 86%, 70% 86%, 48% 100%, 38% 90%, 16% 90%, 16% 70%, 0 70%);
  box-shadow: 6px 6px 0 #111;
}
.tracks {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 28px;
  height: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 4px solid #c9c4b8;
  border-bottom: 4px solid #c9c4b8;
  padding: 0 8px;
}
.tracks i {
  width: 18px;
  height: 8px;
  background: #8a7150;
  box-shadow: 0 18px 0 #8a7150;
}

.section-head { max-width: var(--max); margin: 0 auto 42px; }
.row-no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--stencil-font);
  font-size: clamp(40px, 6vw, 68px);
  line-height: .8;
  color: var(--white);
}
.row-no.light { color: var(--ink); }
.kicker {
  margin: 0 0 8px;
  font: 600 12px/1 var(--display);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}
h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.02;
  max-width: 18ch;
  color: var(--white);
}
.section-head > p:not(.kicker) {
  max-width: 68ch;
  color: var(--concrete);
}

.profile,
.limits { background: var(--graphite); }
.codes,
.repair { background: var(--graphite-mid); }
.builder { background: var(--graphite-deep); }
.profile,
.codes,
.repair,
.limits,
.builder {
  padding-top: clamp(72px, 9vw, 120px);
  padding-bottom: clamp(72px, 9vw, 120px);
  border-top: 1px solid var(--hair);
}

.profile-grid,
.split,
.builder-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(24px, 4vw, 56px);
  max-width: var(--max);
  margin: 0 auto;
}
.copy-block p { color: var(--concrete); }
.notice {
  border-left: 6px solid var(--signal);
  background: var(--ink);
  padding: 16px 18px;
  color: var(--white);
}
.notice h3 { margin: 0 0 8px; font-size: 20px; }
.file-card,
.reg-table {
  background: var(--paper);
  color: var(--ink);
  padding: 8px 22px 18px;
  border-top: 8px solid var(--signal);
}
.file-card div,
.reg-table div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #d4cfc4;
}
.file-card dt,
.reg-table dt {
  font-size: 12px;
  color: #6a6660;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.file-card dd,
.reg-table dd { margin: 0; font-weight: 600; }
.file-card a { color: #5c4a00; }

.part-table { max-width: var(--max); margin: 0 auto; border: 1px solid var(--line); }
.part-head,
.part-row {
  display: grid;
  grid-template-columns: 70px 90px 1.4fr .7fr;
  gap: 12px;
  align-items: start;
}
.part-head {
  padding: 10px 16px;
  background: var(--signal);
  color: var(--ink);
  font: 600 11px/1 var(--display);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.part-row {
  padding: 18px 16px;
  border-top: 1px solid var(--hair);
  background: var(--graphite-deep);
}
.part-row.primary-row { background: #3a3420; }
.part-row b {
  font-family: var(--stencil-font);
  font-size: 28px;
  color: var(--white);
  line-height: 1;
}
.part-row code {
  font-family: var(--stencil-font);
  font-size: 18px;
  color: var(--signal);
}
.part-row h3 {
  margin: 6px 0 8px;
  font-size: 20px;
  color: var(--white);
}
.part-row p { margin: 0; color: var(--concrete); font-size: 15px; }
.chip {
  display: inline-block;
  padding: 2px 7px;
  background: var(--signal);
  color: var(--ink);
  font: 700 10px var(--display);
  letter-spacing: .1em;
}
.part-row > p { align-self: center; color: var(--muted); }

.fact-list,
.stencil-list,
.limit-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.fact-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.fact-list h3 { margin: 0 0 6px; font-size: 18px; color: var(--signal); }
.fact-list p { margin: 0; color: var(--concrete); }
.stencil-list { counter-reset: st; }
.stencil-list li {
  counter-increment: st;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px solid var(--hair);
  color: var(--concrete);
}
.stencil-list li::before {
  content: counter(st, decimal-leading-zero);
  font-family: var(--stencil-font);
  font-size: 24px;
  color: var(--white);
}
.card-row,
.status-grid,
.grid-four,
.people-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: var(--max);
  margin: 0 auto;
}
.grid-four {
  list-style: none;
  padding: 0;
  margin: 0 auto;
}
.grid-four li,
.card-row article,
.status-grid article {
  background: var(--paper);
  color: var(--ink);
  padding: 18px;
  min-height: 160px;
  border-left: 5px solid var(--signal);
}
.card-row span,
.status-grid b {
  display: block;
  font-family: var(--stencil-font);
  font-size: 28px;
  color: #8a867c;
  margin-bottom: 10px;
}
.card-row h3,
.status-grid h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--ink);
}
.card-row p,
.status-grid p,
.grid-four li { margin: 0; }

.route-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  max-width: var(--max);
  margin: 0 auto 48px;
  list-style: none;
  padding: 0;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.route-list li {
  padding: 24px 20px;
  background: var(--graphite);
}
.route-list span {
  font-family: var(--stencil-font);
  font-size: 36px;
  color: var(--signal);
}
.route-list h3 { margin: 10px 0 8px; font-size: 22px; color: var(--white); }
.route-list p { margin: 0; color: var(--concrete); }

.limit-list { max-width: var(--max); margin: 0 auto; }
.limit-list li {
  padding: 16px 0 16px 72px;
  border-bottom: 1px solid var(--line);
  position: relative;
  color: var(--concrete);
}
.limit-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 10px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--signal);
  color: var(--ink);
  font: 700 22px var(--display);
}

.req-form {
  display: grid;
  gap: 14px;
}
.req-form .btn { width: max-content; }
.req-form label,
.contact-form label { display: block; }
.req-form label > span,
.contact-form label > span {
  display: block;
  margin-bottom: 6px;
  font: 600 12px var(--display);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--signal);
}
.req-form input,
.req-form select,
.req-form textarea,
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--ink);
  color: var(--white);
  padding: 12px 14px;
  border-radius: 0;
  outline: none;
}
.req-form :focus,
.contact-form :focus {
  border-color: var(--signal);
  box-shadow: 0 0 0 2px rgba(245, 196, 0, .35);
}
.summary-pad {
  background: var(--paper);
  color: var(--ink);
  padding: 20px;
  display: flex;
  flex-direction: column;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--signal);
}
.pad-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 10px;
  font: 600 12px var(--display);
  letter-spacing: .12em;
}
#reqOutput {
  white-space: pre-wrap;
  font: 500 13.5px/1.65 var(--body);
  flex: 1;
  min-height: 220px;
}
.pad-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.pad-note { font-size: 13px; color: #5f5b54; margin: 12px 0 0; }

.reg-table { max-width: var(--max); margin: 0 auto; }
.reg-table div { grid-template-columns: 240px 1fr; }

.people-grid {
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--max);
  margin: 42px auto 0;
}
.people-grid article {
  background: var(--paper);
  color: var(--ink);
  padding: 22px;
  min-height: 180px;
}
.work-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: var(--max);
  margin: 0 auto 48px;
}
.work-card {
  background: var(--graphite-deep);
  border: 1px solid var(--line);
  padding: 22px 20px;
  min-height: 240px;
}
.work-card.primary-card {
  background: #3a3420;
  border-color: var(--signal);
}
.work-card code {
  display: block;
  margin: 10px 0 12px;
  font-family: var(--stencil-font);
  font-size: 22px;
  color: var(--signal);
}
.work-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  color: var(--white);
}
.work-card p { margin: 0; color: var(--concrete); }
.codes .split { margin-top: 8px; }
.codes h3 { color: var(--white); }
.faq-list {
  max-width: var(--max);
  margin: 0 auto;
  border: 1px solid var(--line);
}
.faq-list details {
  border-bottom: 1px solid var(--hair);
  background: var(--graphite-deep);
}
.faq-list details:last-child { border-bottom: 0; }
.faq-list summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 20px;
  font: 600 18px/1.25 var(--display);
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--white);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  float: right;
  font-family: var(--stencil-font);
  color: var(--signal);
}
.faq-list details[open] summary::after { content: "–"; }
.faq-list details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--concrete);
  max-width: 72ch;
}
.contact-file {
  align-self: stretch;
  margin: 0;
}
.role {
  margin: 0 0 8px;
  font: 600 12px var(--display);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #7a5d00;
}
.people-grid h3 { margin: 0 0 12px; font-size: 24px; color: var(--ink); text-transform: none; letter-spacing: 0; }

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 72px);
  padding-top: clamp(72px, 9vw, 120px);
  padding-bottom: clamp(72px, 9vw, 120px);
  background: var(--signal);
  color: var(--ink);
}
.contact .kicker { color: var(--ink); }
.contact h2 { color: var(--ink); max-width: 16ch; }
.contact-copy > p:not(.kicker) { max-width: 56ch; }
.big-mail {
  display: inline-block;
  margin: 18px 0 28px;
  font: 600 clamp(26px, 3.4vw, 44px)/1 var(--display);
  letter-spacing: .04em;
  text-decoration-thickness: 2px;
}
.contact aside {
  background: var(--ink);
  color: var(--stencil);
  padding: 18px 20px;
}
.contact aside h3 { margin: 0 0 10px; font-size: 16px; color: var(--signal); }
.contact aside p { margin: 0 0 8px; }
.contact-form {
  background: var(--graphite-deep);
  color: var(--stencil);
  padding: 24px;
}
.contact-form label { margin-bottom: 14px; }
.contact-form .btn { margin-top: 4px; }
.form-note,
.form-status { font-size: 13px; color: var(--muted); }
.form-status { color: var(--signal); font-weight: 700; min-height: 1.2em; }

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding-top: 28px;
  padding-bottom: 28px;
  background: var(--ink);
  color: var(--muted);
  font-size: 13px;
}
footer a {
  font: 600 12px var(--display);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--signal);
  text-decoration: none;
}

@media (max-width: 1080px) {
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    background: var(--ink);
    border-bottom: 4px solid var(--signal);
  }
  .nav.open { display: flex; }
  .nav a {
    display: block;
    padding: 16px 22px;
    border: 0;
    border-bottom: 1px solid var(--hair);
    color: var(--white);
  }
  .nav a:last-child { border-right: 0; }
  .menu { display: block; }
  .hero,
  .profile-grid,
  .split,
  .builder-grid,
  .contact { grid-template-columns: 1fr; }
  .part-head,
  .part-row { grid-template-columns: 56px 80px 1fr; }
  .part-row > p { grid-column: 2 / -1; }
  .card-row,
  .status-grid,
  .grid-four,
  .route-list,
  .work-grid { grid-template-columns: 1fr 1fr; }
  .people-grid { grid-template-columns: 1fr; }
  .hero-meta { grid-template-columns: 1fr 1fr; }
  .file-card div,
  .reg-table div { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 64px; }
  .yard-bar { min-height: 64px; padding: 0 14px; }
  .nav { top: 64px; }
  .brand-copy small { display: none; }
  .hero { min-height: 0; padding-top: 36px; }
  .hero h1 { max-width: none; }
  .hero-meta { margin-bottom: 40px; }
  .yard-scene { min-height: 0; padding: 0 0 40px; }
  .card-row,
  .status-grid,
  .grid-four,
  .route-list,
  .work-grid,
  .hero-meta { grid-template-columns: 1fr; }
  .part-head { display: none; }
  .part-head,
  .part-row { grid-template-columns: 48px 1fr; }
  .part-row code { grid-column: 2; }
  .part-row > p { grid-column: 2; }
  footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}