:root {
  --ink: #171917;
  --ink-soft: #232622;
  --paper: #e7e2d8;
  --paper-bright: #f0ece4;
  --spruce: #c69a62;
  --orange: #f56600;
  --orange-dark: #b94700;
  --line-dark: rgb(23 25 23 / 42%);
  --line-light: rgb(231 226 216 / 26%);
  --display: Impact, Haettenschweiler, "Arial Narrow Bold", "Arial Narrow", sans-serif;
  --body: "Arial Nova", Arial, Helvetica, sans-serif;
  --frame: 1280px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --ease-weighted: cubic-bezier(0.16, 0.84, 0.22, 1);
  --ease-firm: cubic-bezier(0.2, 0.72, 0.2, 1);
  color-scheme: dark light;
  font-synthesis: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 7.25rem;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: 1000;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.045;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgb(255 255 255 / 8%) 4px),
    repeating-linear-gradient(90deg, transparent 0 7px, rgb(0 0 0 / 8%) 8px);
  mix-blend-mode: soft-light;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
summary {
  font: inherit;
}

button {
  border: 0;
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--orange);
  color: var(--ink);
}

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.frame {
  width: min(100% - (2 * var(--gutter)), var(--frame));
  margin-inline: auto;
}

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

.skip-link {
  position: fixed;
  z-index: 2000;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  transform: translateY(-160%);
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms var(--ease-firm);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: 100%;
  background: rgb(15 17 15 / 94%);
  color: var(--paper);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - (2 * var(--gutter)), calc(var(--frame) + 8rem));
  min-height: 7.25rem;
  margin-inline: auto;
  border-bottom: 1px solid var(--line-light);
}

.wordmark {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 15rem;
  color: inherit;
  text-decoration: none;
  text-transform: uppercase;
}

.wordmark__name {
  font-family: var(--display);
  font-size: clamp(1.85rem, 2.5vw, 2.55rem);
  line-height: 0.94;
  letter-spacing: 0.055em;
}

.wordmark__trade {
  margin-top: 0.55rem;
  font-family: "Arial Narrow", var(--body);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.28em;
}

.primary-navigation {
  display: flex;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}

.primary-navigation a,
.footer-navigation a,
.footer-navigation button {
  position: relative;
  color: inherit;
  font-family: "Arial Narrow", var(--body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-decoration: none;
}

.primary-navigation a::after,
.footer-navigation a::after,
.footer-navigation button::after {
  position: absolute;
  right: 0;
  bottom: -0.5rem;
  left: 0;
  height: 2px;
  content: "";
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease-firm);
}

.primary-navigation a:hover::after,
.primary-navigation a:focus-visible::after,
.footer-navigation a:hover::after,
.footer-navigation a:focus-visible::after,
.footer-navigation button:hover::after,
.footer-navigation button:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0.75rem;
  background: transparent;
  color: currentColor;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 220ms var(--ease-firm);
}

.menu-toggle span + span {
  margin-top: 0.5rem;
}

.hero {
  position: relative;
  min-height: max(47rem, 100svh);
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 48%, rgb(255 255 255 / 3%), transparent 33%),
    linear-gradient(110deg, #111311 0%, var(--ink) 48%, #101210 100%);
}

.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: repeating-linear-gradient(90deg, transparent 0 calc(25% - 1px), rgb(231 226 216 / 3%) 25%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(31rem, 0.85fr) minmax(40rem, 1.15fr);
  align-items: center;
  min-height: max(47rem, calc(100svh - 4.5rem));
  padding-top: 8rem;
  padding-bottom: 6rem;
}

.hero__copy {
  position: relative;
  z-index: 4;
  align-self: center;
  padding-top: 2rem;
}

.hero h1,
.process h2,
.services h2,
.project-start h2,
.contact h2,
.concept-dialog h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 900;
  /* Keeps the compact display rhythm while giving umlauts room between lines. */
  line-height: 0.94;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: none;
  font-size: clamp(5.25rem, 8.7vw, 8.75rem);
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero__copy > p {
  max-width: 31rem;
  margin: 1.75rem 0 0;
  color: rgb(231 226 216 / 84%);
  font-size: clamp(1.05rem, 1.3vw, 1.3rem);
  line-height: 1.55;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 4.25rem;
  padding: 1rem 1.4rem 1rem 1.65rem;
  border: 2px solid transparent;
  border-radius: 0;
  font-family: "Arial Narrow", var(--body);
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 120ms ease;
}

.button svg {
  width: 1.35rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
  stroke-linejoin: miter;
  transition: transform 180ms var(--ease-firm);
}

.button:hover svg,
.button:focus-visible svg {
  transform: translateX(0.28rem);
}

.button:active {
  transform: translateY(2px);
}

.button--primary {
  min-width: 17rem;
  margin-top: 2rem;
  background: var(--orange);
  box-shadow:
    inset -5px -5px 0 rgb(88 22 8 / 28%),
    inset 2px 2px 0 rgb(255 255 255 / 14%);
  color: var(--ink);
}

.button--primary:hover,
.button--primary:focus-visible {
  background: #ff7412;
  box-shadow:
    inset -3px -3px 0 rgb(88 22 8 / 34%),
    inset 2px 2px 0 rgb(255 255 255 / 18%);
}

.button--dark {
  margin-top: 1.5rem;
  background: var(--ink);
  color: var(--paper);
}

.roof-visual {
  position: relative;
  aspect-ratio: 3 / 2;
  margin: 0;
  isolation: isolate;
}

.roof-slice {
  position: absolute;
  inset: 0;
  overflow: visible;
  will-change: transform, opacity;
}

.roof-slice img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  user-select: none;
  backface-visibility: hidden;
}

.hero__roof {
  z-index: 2;
  width: min(60vw, 50rem);
  margin-left: 0;
  filter: drop-shadow(0 1.6rem 1.8rem rgb(0 0 0 / 32%));
}

.hero__roof .roof-slice {
  transition:
    transform 980ms var(--ease-weighted),
    opacity 420ms ease;
}

.hero__roof .roof-slice--skin {
  transform: translateY(22%);
}

.hero__roof .roof-slice--battens {
  transform: translateY(10%);
}

.hero__roof .roof-slice--rafters {
  transform: translateY(-1%);
}

.is-ready .hero__roof .roof-slice {
  transform: translateY(0);
}

.is-ready .hero__roof .roof-slice--battens {
  transition-delay: 90ms;
}

.is-ready .hero__roof .roof-slice--skin {
  transition-delay: 180ms;
}

.roof-index {
  position: absolute;
  z-index: 5;
  right: -0.5rem;
  width: 7.5rem;
  border-top: 1px solid rgb(231 226 216 / 44%);
  color: rgb(231 226 216 / 78%);
}

.roof-index span {
  position: absolute;
  top: -1.15rem;
  right: 0;
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  border: 1px solid rgb(231 226 216 / 40%);
  background: var(--ink);
  font-family: var(--display);
  font-size: 1.1rem;
}

.roof-index--one {
  top: 22%;
}

.roof-index--two {
  top: 49%;
}

.roof-index--three {
  top: 74%;
}

.hero__edge {
  position: absolute;
  z-index: 5;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  min-height: 4.5rem;
  background:
    linear-gradient(90deg, rgb(23 25 23 / 5%) 1px, transparent 1px) 0 0 / 25% 100%,
    var(--paper);
  color: rgb(23 25 23 / 58%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-align: right;
  text-transform: uppercase;
}

.hero__edge .frame {
  text-align: right;
}

.section-register {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 4rem;
  border-bottom: 1px solid var(--line-dark);
  color: rgb(23 25 23 / 58%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-register::before,
.section-register::after {
  position: absolute;
  bottom: -0.45rem;
  width: 1px;
  height: 0.9rem;
  content: "";
  background: currentColor;
}

.section-register::before {
  left: 0;
}

.section-register::after {
  right: 0;
}

.section-register--dark {
  border-color: var(--line-light);
  color: rgb(231 226 216 / 56%);
}

.process {
  position: relative;
  min-height: 230vh;
  background:
    radial-gradient(circle at 22% 40%, rgb(255 255 255 / 42%), transparent 34%),
    var(--paper);
  color: var(--ink);
}

.process__sticky {
  position: sticky;
  top: 0;
  min-height: 100svh;
  overflow: hidden;
}

.process__inner {
  display: grid;
  grid-template-columns: minmax(24rem, 0.83fr) minmax(35rem, 1.3fr);
  gap: clamp(1rem, 4vw, 4rem);
  align-items: center;
  min-height: calc(100svh - 4rem);
  padding-block: 3rem 4.5rem;
}

.process__copy {
  position: relative;
  z-index: 3;
}

.process h2 {
  max-width: none;
  font-size: clamp(4.2rem, 5.5vw, 5.8rem);
}

.process h2 span {
  display: block;
  white-space: nowrap;
}

.process__intro {
  max-width: 31rem;
  margin: 1.4rem 0 2rem;
  color: rgb(23 25 23 / 76%);
  font-size: clamp(1rem, 1.2vw, 1.15rem);
}

.roof-explorer {
  display: grid;
  width: min(100%, 30rem);
  border-top: 1px solid var(--line-dark);
}

.roof-explorer__choice {
  display: grid;
  grid-template-columns: 3.25rem 1fr 1.5rem;
  gap: 1rem;
  align-items: center;
  min-height: 4.55rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line-dark);
  background: transparent;
  color: var(--ink);
  font-family: "Arial Narrow", var(--body);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.035em;
  text-align: left;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, padding 220ms var(--ease-firm);
}

.roof-explorer__choice span {
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
}

.roof-explorer__choice strong {
  font: inherit;
}

.roof-explorer__choice svg {
  width: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.roof-explorer__choice:hover,
.roof-explorer__choice:focus-visible {
  padding-inline: 1.35rem 0.75rem;
  background: rgb(23 25 23 / 8%);
}

.roof-explorer__choice.is-active {
  background: var(--orange);
  color: var(--ink);
}

.roof-explorer__detail {
  max-width: 29rem;
  min-height: 4.8rem;
  margin: 1.2rem 0 0;
  color: rgb(23 25 23 / 76%);
  font-size: 0.98rem;
  line-height: 1.55;
}

.process-steps {
  position: relative;
  margin: 0;
  padding: 0 0 0 3.5rem;
  list-style: none;
}

.process-steps::before {
  position: absolute;
  top: 1.65rem;
  bottom: 1.65rem;
  left: 0.62rem;
  width: 2px;
  content: "";
  background: var(--ink);
}

.process-step {
  position: relative;
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: 1rem;
  align-items: start;
  min-height: 4.65rem;
  padding: 1rem 0;
  border-top: 1px solid transparent;
  color: rgb(23 25 23 / 90%);
  transition: color 220ms ease;
}

.process-step::before {
  position: absolute;
  top: 1.42rem;
  left: -3.5rem;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: var(--paper);
  content: "";
  transform: translateX(0);
  transition:
    background-color 220ms ease,
    border-color 220ms ease,
    transform 220ms var(--ease-firm);
}

.process-step::after {
  position: absolute;
  top: 2rem;
  left: calc(100% + 1rem);
  width: clamp(3rem, 12vw, 12rem);
  height: 1px;
  content: "";
  background: currentColor;
  opacity: 0.3;
  transition:
    width 260ms var(--ease-firm),
    opacity 220ms ease;
}

.process-step__number,
.process-step h3 {
  font-family: var(--display);
  font-weight: 900;
  line-height: 1;
  text-transform: uppercase;
}

.process-step__number {
  font-size: 2.25rem;
}

.process-step h3 {
  margin: 0.18rem 0 0;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  letter-spacing: 0.02em;
}

.process-step p {
  max-width: 25rem;
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  transition:
    max-height 300ms var(--ease-firm),
    margin 300ms var(--ease-firm),
    opacity 220ms ease;
}

.process-step.is-active {
  color: var(--orange);
}

.process-step.is-active::before {
  border-color: var(--orange);
  background: var(--orange);
  transform: scale(1.06);
}

.process-step.is-active::after {
  width: clamp(5rem, 16vw, 15rem);
  opacity: 0.8;
}

.process-step.is-active p {
  max-height: 8rem;
  margin-top: 0.6rem;
  opacity: 1;
  color: var(--ink);
}

.process__roof {
  align-self: start;
  width: min(64vw, 53rem);
  margin-right: -7rem;
  filter: drop-shadow(0 1.25rem 1.35rem rgb(23 25 23 / 16%));
}

.process__roof .roof-slice {
  transition:
    opacity 220ms ease,
    filter 220ms ease,
    transform 120ms linear;
}

.process__roof .roof-slice--skin {
  transform: translateY(var(--skin-shift, 2rem));
}

.process__roof .roof-slice--battens {
  transform: translateY(var(--batten-shift, 1rem));
}

.process__roof .roof-slice--rafters {
  transform: translateY(var(--rafter-shift, 0rem));
}

.process[data-step="0"] .process__roof .roof-slice--skin,
.process[data-step="1"] .process__roof .roof-slice--battens,
.process[data-step="2"] .process__roof .roof-slice--rafters {
  z-index: 2;
  opacity: 1;
  filter: saturate(1.03) contrast(1.02);
}

.process[data-step="0"] .process__roof .roof-slice--battens,
.process[data-step="0"] .process__roof .roof-slice--rafters,
.process[data-step="1"] .process__roof .roof-slice--skin,
.process[data-step="1"] .process__roof .roof-slice--rafters,
.process[data-step="2"] .process__roof .roof-slice--skin,
.process[data-step="2"] .process__roof .roof-slice--battens {
  opacity: 0.62;
  filter: saturate(0.68) contrast(0.94);
}

.process-roof__line {
  display: none;
}

.services {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  padding-bottom: clamp(5rem, 9vw, 8rem);
  background:
    linear-gradient(90deg, rgb(255 255 255 / 2%) 1px, transparent 1px) 0 0 / 25% 100%,
    repeating-linear-gradient(0deg, transparent 0 7px, rgb(0 0 0 / 8%) 8px),
    #121412;
  color: var(--paper);
}

.services__inner {
  padding-top: clamp(3.5rem, 6vw, 5.5rem);
}

.services__heading-row {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
}

.services h2 {
  max-width: none;
  font-size: clamp(4.5rem, 6.3vw, 6.2rem);
}

.services h2 span {
  display: block;
  white-space: nowrap;
}

.services__heading-row > p {
  max-width: 30rem;
  margin: 0 0 0.6rem;
  color: rgb(231 226 216 / 80%);
  font-size: clamp(1rem, 1.2vw, 1.15rem);
}

.services__body {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(25rem, 0.95fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
  margin-top: 2.5rem;
}

.material-study {
  margin: 0;
}

.material-study__image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--spruce);
}

.material-study__image::after {
  position: absolute;
  inset: 0;
  content: "";
  background: var(--ink);
  transform: translateX(0);
  transform-origin: right;
  transition: transform 850ms var(--ease-weighted);
}

.material-study.is-visible .material-study__image::after {
  transform: translateX(101%);
}

.material-study img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.material-study figcaption {
  margin-top: 0.8rem;
  color: rgb(231 226 216 / 68%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.service-proposals {
  padding-top: 0.25rem;
}

.service-row {
  border-bottom: 2px solid var(--orange);
}

.service-row summary {
  display: grid;
  grid-template-columns: 4rem 1fr 3.5rem;
  gap: 1rem;
  align-items: center;
  min-height: 7.1rem;
  color: var(--paper);
  list-style: none;
  cursor: pointer;
  transition:
    color 180ms ease,
    padding 220ms var(--ease-firm),
    background-color 180ms ease;
}

.service-row summary::-webkit-details-marker {
  display: none;
}

.service-row summary:hover,
.service-row summary:focus-visible {
  padding-inline: 0.7rem;
  background: rgb(231 226 216 / 4%);
  color: var(--orange);
}

.service-row__number,
.service-row__title {
  font-family: var(--display);
  font-weight: 900;
  line-height: 1;
  text-transform: uppercase;
}

.service-row__number {
  padding-right: 1rem;
  border-right: 1px solid rgb(231 226 216 / 36%);
  font-size: 2.65rem;
}

.service-row__title {
  font-size: clamp(1.9rem, 3.2vw, 3rem);
}

.service-row svg,
.contact-row svg {
  width: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.35;
  stroke-linecap: square;
  stroke-linejoin: miter;
  transition: transform 220ms var(--ease-firm);
}

.service-row[open] summary {
  color: var(--orange);
}

.service-row[open] summary svg {
  transform: rotate(90deg);
}

.service-row > p {
  margin: -0.5rem 0 0;
  padding: 0 1rem 1.4rem 5rem;
  color: rgb(231 226 216 / 68%);
  font-size: 0.9rem;
}

.service-proposals__note {
  margin: 1.7rem 0 0;
  color: rgb(231 226 216 / 50%);
  font-size: 0.78rem;
  text-align: right;
}

.project-start {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgb(23 25 23 / 8%) 1px, transparent 1px) 0 0 / 25% 100%,
    var(--paper);
  color: var(--ink);
}

.project-start__inner {
  display: grid;
  grid-template-columns: minmax(17rem, 0.72fr) minmax(32rem, 1.28fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: start;
  padding-block: clamp(4rem, 8vw, 7rem);
}

.project-start h2 {
  font-size: clamp(3.8rem, 5.4vw, 5.65rem);
}

.project-start h2 span {
  display: block;
}

.project-start__intro > p {
  max-width: 26rem;
  margin: 1.5rem 0 0;
  color: rgb(23 25 23 / 76%);
}

.project-flow {
  border: 1px solid var(--line-dark);
  background: rgb(240 236 228 / 48%);
}

.project-flow__progress {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line-dark);
}

.project-flow__progress span {
  min-height: 3.65rem;
  padding: 1rem;
  border-right: 1px solid var(--line-dark);
  color: rgb(23 25 23 / 56%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.project-flow__progress span:last-child {
  border-right: 0;
}

.project-flow__progress .is-current {
  background: var(--ink);
  color: var(--paper);
}

.project-flow__stage {
  min-height: 16rem;
  padding: clamp(1.5rem, 3vw, 2.4rem);
}

.project-flow__question {
  margin: 0 0 1.35rem;
  font-family: var(--display);
  font-size: clamp(1.85rem, 2.6vw, 2.55rem);
  line-height: 1;
  text-transform: uppercase;
}

.project-flow__choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.project-flow__choices button {
  display: grid;
  gap: 0.6rem;
  min-height: 7.5rem;
  padding: 1rem;
  border: 1px solid var(--line-dark);
  background: transparent;
  color: var(--ink);
  font-family: var(--display);
  font-size: clamp(1.3rem, 2vw, 1.75rem);
  line-height: 1;
  text-align: left;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, transform 180ms var(--ease-firm);
}

.project-flow__choices button span {
  color: var(--orange-dark);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.project-flow__choices button:hover,
.project-flow__choices button:focus-visible,
.project-flow__choices button[aria-pressed="true"] {
  background: var(--orange);
  color: var(--ink);
  transform: translateY(-0.2rem);
}

.project-flow__choices button[aria-pressed="true"] span {
  color: inherit;
}

.project-flow__checks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.project-flow__checks label {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--line-dark);
  font-family: "Arial Narrow", var(--body);
  font-weight: 800;
  text-transform: uppercase;
}

.project-flow__checks input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--orange);
}

.project-flow__note {
  display: grid;
  gap: 0.45rem;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  font-weight: 700;
}

.project-flow__note span,
.project-flow__status {
  color: rgb(23 25 23 / 58%);
  font-size: 0.8rem;
  font-weight: 400;
}

.project-flow textarea {
  width: 100%;
  resize: vertical;
  padding: 0.8rem;
  border: 1px solid var(--line-dark);
  border-radius: 0;
  background: rgb(255 255 255 / 32%);
  color: var(--ink);
  font: inherit;
}

.project-flow__summary {
  max-width: 35rem;
  margin: 0;
  color: rgb(23 25 23 / 78%);
}

.project-flow__status {
  margin: 1.1rem 0 0;
}

.project-flow__actions {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem clamp(1.5rem, 3vw, 2.4rem);
  border-top: 1px solid var(--line-dark);
}

.project-flow__actions .button {
  margin: 0 0 0 auto;
}

.project-flow__back {
  min-height: 3rem;
  padding: 0.6rem 0;
  background: transparent;
  color: var(--ink);
  font-family: "Arial Narrow", var(--body);
  font-weight: 800;
  text-transform: uppercase;
  cursor: pointer;
}

.project-flow__back:hover,
.project-flow__back:focus-visible {
  color: var(--orange-dark);
}

.project-flow [hidden] {
  display: none;
}

.contact {
  position: relative;
  min-height: 47rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 40%, rgb(255 255 255 / 45%), transparent 45%),
    var(--paper);
  color: var(--ink);
}

.contact::before,
.contact::after {
  position: absolute;
  z-index: 1;
  top: 18rem;
  bottom: 0;
  width: 2rem;
  content: "";
  background: var(--ink);
}

.contact::before {
  left: 0;
}

.contact::after {
  right: 0;
}

.contact__gable {
  position: absolute;
  z-index: 1;
  top: 1rem;
  left: 50%;
  width: min(112rem, 118vw);
  height: 24rem;
  transform: translateX(-50%);
  pointer-events: none;
}

.contact__beam {
  position: absolute;
  top: 8rem;
  width: 56%;
  height: 2rem;
  background: var(--ink);
  transition: transform 920ms var(--ease-weighted);
}

.contact__beam--left {
  right: 50%;
  transform: translateX(-14%) rotate(-21deg);
  transform-origin: right center;
}

.contact__beam--right {
  left: 50%;
  transform: translateX(14%) rotate(21deg);
  transform-origin: left center;
}

.contact.is-in-view .contact__beam--left {
  transform: translateX(0) rotate(-21deg);
}

.contact.is-in-view .contact__beam--right {
  transform: translateX(0) rotate(21deg);
}

.contact__ridge {
  position: absolute;
  z-index: 2;
  top: 6rem;
  left: 50%;
  width: 1.8rem;
  height: 5rem;
  background: var(--ink);
  opacity: 0;
  transform: translate(-50%, -1rem);
  transition:
    opacity 260ms ease 620ms,
    transform 360ms var(--ease-weighted) 620ms;
}

.contact.is-in-view .contact__ridge {
  opacity: 1;
  transform: translate(-50%, 0);
}

.contact__inner {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20rem;
  gap: clamp(4rem, 9vw, 9rem);
  align-items: start;
  width: min(100% - (2 * var(--gutter)), 56.25rem);
  padding-top: 22rem;
  padding-bottom: 6rem;
}

.contact h2 {
  max-width: none;
  font-size: clamp(3.5rem, 4vw, 4rem);
}

.contact h2 span {
  display: block;
  white-space: nowrap;
}

.contact__copy > p {
  max-width: 29rem;
  margin: 1.5rem 0 0;
  font-size: 1.1rem;
}

.contact-details {
  padding-top: 2.2rem;
}

.contact-details h3 {
  margin: 0 0 0.8rem;
  font-family: var(--display);
  font-size: 2.15rem;
  line-height: 1;
  text-transform: uppercase;
}

.contact-row {
  display: grid;
  grid-template-columns: 1fr 2.2rem;
  gap: 1rem;
  align-items: center;
  width: 100%;
  min-height: 4.7rem;
  padding: 0;
  border-bottom: 1px solid var(--orange);
  background: transparent;
  color: var(--ink);
  font-family: "Arial Narrow", var(--body);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: left;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    color 180ms ease,
    padding 220ms var(--ease-firm),
    background-color 180ms ease;
}

.contact-row:hover,
.contact-row:focus-visible {
  padding-inline: 0.65rem;
  background: rgb(23 25 23 / 4%);
  color: var(--orange-dark);
}

.contact-row:hover svg,
.contact-row:focus-visible svg {
  transform: translateX(0.25rem);
}

.site-footer {
  position: relative;
  z-index: 5;
  background:
    repeating-linear-gradient(0deg, transparent 0 7px, rgb(0 0 0 / 10%) 8px),
    #101210;
  color: var(--paper);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 16rem 1fr;
  gap: 2rem 5rem;
  align-items: center;
  padding-block: 2.5rem 2rem;
}

.wordmark--footer {
  min-width: 0;
}

.wordmark--footer .wordmark__name {
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--orange);
  font-size: 2rem;
}

.footer-navigation {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.25rem 2.5rem;
}

.footer-navigation button {
  padding: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.site-footer__inner > p {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-light);
  color: rgb(231 226 216 / 48%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.concept-dialog {
  width: min(calc(100% - 2rem), 38rem);
  padding: 3rem;
  border: 0;
  border-radius: 0;
  background: var(--paper-bright);
  color: var(--ink);
  box-shadow: 1rem 1rem 0 rgb(0 0 0 / 28%);
}

.concept-dialog::backdrop {
  background: rgb(9 10 9 / 78%);
  backdrop-filter: blur(2px);
}

.concept-dialog__topline {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 0.45rem;
  background: var(--orange);
}

.concept-dialog__index {
  margin: 0 0 1.6rem;
  color: rgb(23 25 23 / 58%);
  font-family: "Arial Narrow", var(--body);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.concept-dialog h2 {
  max-width: 8ch;
  font-size: clamp(3.4rem, 8vw, 5.2rem);
}

.concept-dialog > p:not(.concept-dialog__index) {
  max-width: 31rem;
  margin: 1.5rem 0 0;
  color: rgb(23 25 23 / 78%);
  font-size: 1rem;
}

.concept-dialog__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 3rem;
  height: 3rem;
  padding: 0.8rem;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.concept-dialog__close span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1.65rem;
  height: 2px;
  background: currentColor;
}

.concept-dialog__close span:first-child {
  transform: translate(-50%, -50%) rotate(45deg);
}

.concept-dialog__close span:last-child {
  transform: translate(-50%, -50%) rotate(-45deg);
}

@media (max-width: 1100px) {
  .hero__inner {
    grid-template-columns: minmax(20rem, 0.85fr) minmax(30rem, 1.15fr);
  }

  .hero h1 {
    font-size: clamp(4.8rem, 9.8vw, 7.2rem);
  }

  .hero__roof {
    width: min(68vw, 48rem);
    margin-left: -5rem;
  }

  .roof-index {
    /* Compensate for the roof's intentional negative margin at this width. */
    right: clamp(2.5rem, 5vw, 4rem);
    width: 5.5rem;
  }

  .process__inner {
    grid-template-columns: minmax(21rem, 0.9fr) minmax(29rem, 1.1fr);
  }

  .process h2 {
    font-size: clamp(3.9rem, 7.5vw, 5.7rem);
  }

  .process__roof {
    width: min(61vw, 43rem);
  }

  .services__body {
    grid-template-columns: minmax(0, 1fr) minmax(22rem, 0.9fr);
  }

  .service-row summary {
    min-height: 6.2rem;
  }
}

@media (max-width: 820px) {
  :root {
    --gutter: 1.25rem;
  }

  html {
    scroll-padding-top: 5.6rem;
  }

  .site-header__inner {
    min-height: 5.6rem;
  }

  .wordmark {
    min-width: 0;
  }

  .wordmark__name {
    font-size: 1.72rem;
  }

  .wordmark__trade {
    margin-top: 0.4rem;
    font-size: 0.58rem;
    letter-spacing: 0.22em;
  }

  .js .menu-toggle {
    position: relative;
    z-index: 52;
    display: block;
  }

  .primary-navigation {
    gap: 1.25rem;
  }

  .js .primary-navigation {
    position: fixed;
    z-index: 51;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 7rem var(--gutter) 3rem;
    background: var(--ink);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-1rem);
    pointer-events: none;
    transition:
      opacity 220ms ease,
      transform 260ms var(--ease-weighted),
      visibility 0s linear 260ms;
  }

  .js .nav-open .primary-navigation {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    transition-delay: 0s;
  }

  .js .primary-navigation a {
    font-family: var(--display);
    font-size: clamp(3.2rem, 13vw, 5.4rem);
    line-height: 0.95;
    text-transform: uppercase;
  }

  .nav-open .menu-toggle span:first-child {
    transform: translateY(5px) rotate(45deg);
  }

  .nav-open .menu-toggle span:last-child {
    transform: translateY(-5px) rotate(-45deg);
  }

  .nav-open {
    overflow: hidden;
  }

  .hero {
    min-height: 56rem;
  }

  .hero__inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    min-height: 56rem;
    padding-top: 7.6rem;
    padding-bottom: 6.5rem;
  }

  .hero__copy {
    z-index: 3;
    width: 100%;
    padding-top: 0;
  }

  .hero h1 {
    max-width: 7ch;
    font-size: clamp(4.5rem, 19vw, 6.4rem);
  }

  .hero__copy > p {
    max-width: 23rem;
    margin-top: 1.2rem;
    font-size: 1rem;
  }

  .button--primary {
    min-width: min(100%, 17rem);
    margin-top: 1.5rem;
  }

  .hero__roof {
    width: min(126vw, 43rem);
    margin: -2.6rem -20vw -1rem auto;
  }

  .roof-index {
    display: none;
  }

  .hero__edge {
    min-height: 4rem;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
  }

  .process {
    min-height: 0;
    overflow: hidden;
  }

  .process__sticky {
    position: relative;
    min-height: 0;
    overflow: visible;
  }

  .process__inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    min-height: 0;
    padding-block: 3.5rem 5rem;
  }

  .process h2 {
    max-width: none;
    font-size: clamp(4rem, 15.2vw, 6rem);
  }

  .process h2 span {
    white-space: normal;
  }

  .process__intro {
    margin-bottom: 2.2rem;
  }

  .process-steps {
    padding-left: 2.5rem;
  }

  .process-step {
    grid-template-columns: 2.6rem 1fr;
  }

  .process-step::before {
    left: -2.5rem;
  }

  .process-step::after {
    display: none;
  }

  .process-step p {
    max-height: none;
    margin-top: 0.6rem;
    opacity: 1;
    color: var(--ink);
  }

  .process__roof {
    order: -1;
    width: min(112vw, 43rem);
    margin: 0 -9vw -2.2rem;
  }

  .process__copy {
    display: contents;
  }

  .process__copy h2,
  .process__copy > .process__intro,
  .process__copy > .process-steps {
    order: 0;
  }

  .process__roof {
    order: 1;
  }

  .process__copy > .process-steps {
    order: 2;
  }

  .process__copy h2,
  .process__copy > .process__intro {
    order: 0;
  }

  .roof-explorer,
  .roof-explorer__detail {
    order: 2;
  }

  .roof-explorer {
    width: 100%;
    margin-top: 0.5rem;
  }

  .process__roof .roof-slice {
    opacity: 1 !important;
    filter: none !important;
    transform: translateY(0) !important;
  }

  .process-roof__line {
    display: none;
  }

  .services__heading-row,
  .services__body {
    grid-template-columns: 1fr;
  }

  .services__heading-row {
    gap: 1.5rem;
  }

  .services h2 {
    font-size: clamp(4rem, 15.5vw, 6rem);
  }

  .services h2 span {
    white-space: normal;
  }

  .services__heading-row > p {
    max-width: 34rem;
  }

  .services__body {
    gap: 2.5rem;
    margin-top: 2.2rem;
  }

  .service-row summary {
    grid-template-columns: 3.2rem 1fr 2.5rem;
    min-height: 5.5rem;
  }

  .service-row__number {
    padding-right: 0.75rem;
    font-size: 2.1rem;
  }

  .service-row__title {
    font-size: clamp(1.65rem, 7vw, 2.45rem);
  }

  .service-row > p {
    padding-left: 4.2rem;
  }

  .project-start__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 3.5rem 4rem;
  }

  .project-start h2 {
    font-size: clamp(3.7rem, 15vw, 5.4rem);
  }

  .project-flow__progress span {
    min-height: 4.3rem;
    padding: 0.7rem;
    font-size: 0.62rem;
  }

  .project-flow__stage {
    min-height: 0;
    padding: 1.25rem;
  }

  .project-flow__choices {
    grid-template-columns: 1fr;
  }

  .project-flow__choices button {
    grid-template-columns: 2rem 1fr;
    align-items: center;
    min-height: 4.5rem;
  }

  .project-flow__actions {
    padding: 1rem 1.25rem;
  }

  .contact {
    min-height: 54rem;
  }

  .contact::before,
  .contact::after {
    top: 12rem;
    width: 0.8rem;
  }

  .contact__gable {
    top: 1rem;
    width: 150vw;
    height: 16rem;
  }

  .contact__beam {
    top: 5.5rem;
    height: 1rem;
  }

  .contact__ridge {
    top: 4.2rem;
    width: 1rem;
    height: 3rem;
  }

  .contact__inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    padding-top: 13rem;
    padding-bottom: 5rem;
  }

  .contact h2 span {
    white-space: normal;
  }

  .contact h2 {
    max-width: 8ch;
    font-size: clamp(4.1rem, 15.5vw, 6rem);
  }

  .contact-details {
    padding-top: 0;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-navigation {
    justify-content: flex-start;
  }

  .site-footer__inner > p {
    grid-column: 1;
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 51rem;
  }

  .hero__inner {
    min-height: 51rem;
  }

  .hero h1 {
    font-size: clamp(4.1rem, 19vw, 5.15rem);
  }

  .hero__roof {
    width: 139vw;
    margin-top: -1rem;
    margin-right: -27vw;
  }

  .section-register {
    min-height: 3.5rem;
    font-size: 0.62rem;
  }

  .process h2,
  .services h2,
  .contact h2 {
    font-size: clamp(3.65rem, 17vw, 4.75rem);
  }

  .process-step h3 {
    font-size: 1.35rem;
  }

  .material-study__image {
    aspect-ratio: 4 / 3;
  }

  .service-proposals__note {
    text-align: left;
  }

  .contact {
    min-height: 51rem;
  }

  .contact-row {
    font-size: 0.82rem;
  }

  .concept-dialog {
    padding: 2.5rem 1.5rem 2rem;
    overflow-x: hidden;
    box-shadow: 0.55rem 0.55rem 0 rgb(0 0 0 / 28%);
  }

  .concept-dialog h2 {
    max-width: 100%;
    font-size: clamp(2.8rem, 13vw, 3.4rem);
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  .hero__roof .roof-slice,
  .process__roof .roof-slice {
    opacity: 1 !important;
    filter: none !important;
    transform: translateY(0) !important;
  }

  .material-study__image::after {
    display: none;
  }

  .contact__beam--left {
    transform: translateX(0) rotate(-21deg);
  }

  .contact__beam--right {
    transform: translateX(0) rotate(21deg);
  }

  .contact__ridge {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}