:root {
  --paper: #f3f5f4;
  --paper-deep: #e5e8e6;
  --ink: #191b1c;
  --muted: #565c5e;
  --line: #c6cbc8;
  --line-strong: #8d9490;
  --red: #a21f2d;
  --header-height: 5rem;
  --field: min(100% - 2rem, 90rem);
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-width: 20rem;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, transparent calc(50% - 0.5px), rgba(25, 27, 28, 0.045) 50%, transparent calc(50% + 0.5px)),
    linear-gradient(to bottom, rgba(25, 27, 28, 0.025) 1px, transparent 1px);
  background-size: 100% 100%, 100% 5rem;
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-color: var(--red);
}

img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--paper-deep);
}

h1,
h2,
h3,
p,
figure,
ol,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.02;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.5rem;
  font-size: clamp(3.25rem, 8vw, 8.75rem);
  font-weight: 650;
}

h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.25rem, 4.6vw, 5.5rem);
  font-weight: 620;
}

h3 {
  font-size: clamp(1.45rem, 2.1vw, 2rem);
  font-weight: 620;
}

.field {
  width: var(--field);
  margin-inline: auto;
  border-inline: 1px solid var(--line);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.75rem 1rem;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
}

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

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

[id] {
  scroll-margin-top: calc(var(--header-height) + 2rem);
}

.control,
.site-header nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border-radius: 0;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line-strong);
  background: rgba(243, 245, 244, 0.96);
}

.site-header__inner {
  min-height: var(--header-height);
  display: flex;
  align-items: stretch;
  justify-content: space-between;
}

.wordmark {
  gap: 0.75rem;
  padding: 0 1.25rem;
  text-decoration: none;
}

.wordmark > span {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--red);
  font-size: 0.75rem;
  font-weight: 700;
}

.wordmark strong {
  font-size: 0.86rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header nav {
  display: flex;
  align-items: stretch;
}

.site-header nav a {
  padding-inline: clamp(0.7rem, 1.6vw, 1.5rem);
  border-left: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.07em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: #fff;
  background: var(--ink);
}

.site-header nav .nav-email {
  color: #fff;
  background: var(--red);
}

.hero {
  min-height: min(54rem, calc(100svh - var(--header-height)));
  position: relative;
  display: grid;
  grid-template-columns: minmax(7rem, 0.22fr) minmax(0, 1fr) minmax(12rem, 0.25fr);
  align-items: end;
  padding: clamp(5rem, 10vw, 9rem) clamp(1rem, 3vw, 3.5rem) 2rem;
}

.hero::before,
.hero::after {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  content: "";
  background: var(--line);
}

.hero::before {
  left: 22%;
}

.hero::after {
  right: 25%;
}

.coordinate,
.section-label,
.eyebrow,
.concept__number,
figcaption,
.service-grid span,
.approach-grid span {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.coordinate--top {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.hero__index {
  align-self: start;
  display: grid;
  gap: 0.6rem;
  padding-top: 0.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
}

.hero__index strong {
  color: var(--red);
}

.hero__copy {
  min-width: 0;
  padding-inline: clamp(1rem, 3vw, 3.5rem);
}

.eyebrow {
  color: var(--red);
}

.hero__lede {
  max-width: 49rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
}

.hero__control,
.concept__link,
.contact__link {
  gap: 1.5rem;
  min-width: min(100%, 19rem);
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border: 1px solid var(--ink);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.hero__control:hover,
.concept__link:hover {
  color: #fff;
  background: var(--ink);
}

.hero__note {
  max-width: 14rem;
  margin: 0;
  padding-left: clamp(1rem, 2vw, 2rem);
  color: var(--muted);
  font-size: 0.82rem;
}

.language-band {
  color: var(--paper);
  background: var(--ink);
}

.language-band__inner {
  display: grid;
  grid-template-columns: 0.9fr 1.25fr 1fr;
  gap: clamp(2rem, 4vw, 5rem);
  padding: clamp(3rem, 6vw, 6rem) clamp(1rem, 3vw, 3.5rem);
  border-color: #3f4243;
}

.language-band h2 {
  max-width: 10ch;
  margin-bottom: 0;
  font-size: clamp(2rem, 3.5vw, 4rem);
}

.language-band .section-label,
.language-band__copy,
.language-list span {
  color: #b8bfbb;
}

.language-list {
  margin-bottom: 0;
  padding: 0;
  border-top: 1px solid #5b605d;
  list-style: none;
}

.language-list li {
  min-height: 3.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  border-bottom: 1px solid #5b605d;
  font-size: 1.05rem;
}

.language-list span {
  font-size: 0.65rem;
}

.language-band__copy {
  align-self: end;
  margin-bottom: 0;
}

.ruled-section {
  position: relative;
  padding: clamp(4rem, 8vw, 8rem) clamp(1rem, 3vw, 3.5rem);
  border-bottom: 1px solid var(--line-strong);
}

.ruled-section::before {
  position: absolute;
  top: 0;
  left: 1rem;
  width: 2rem;
  height: 0.4rem;
  content: "";
  background: var(--red);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(7rem, 0.25fr) minmax(0, 1.45fr) minmax(14rem, 0.55fr);
  gap: clamp(1.5rem, 3vw, 3.5rem);
  align-items: start;
  margin-bottom: clamp(3rem, 6vw, 6rem);
}

.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.section-heading > p:last-child {
  color: var(--muted);
}

.section-heading--wide h2 {
  grid-column: span 2;
  max-width: 18ch;
}

.section-heading--wide > p:last-child {
  grid-column: 2 / -1;
  max-width: 45rem;
}

.service-grid,
.approach-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
  list-style: none;
}

.service-grid li,
.approach-grid li {
  min-width: 0;
  padding: 1.25rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-grid span,
.approach-grid span {
  display: block;
  margin-bottom: clamp(2rem, 5vw, 5rem);
  color: var(--red);
}

.service-grid h3,
.approach-grid h3 {
  margin-bottom: 0.8rem;
}

.service-grid p,
.approach-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line-strong);
  background: var(--line-strong);
}

.concept {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--paper);
}

.concept figure {
  margin-bottom: 0;
  background: var(--paper-deep);
}

.concept img {
  border-bottom: 1px solid var(--line-strong);
}

.concept figcaption {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--line);
}

.concept__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 2.5vw, 2.25rem);
}

.concept__number {
  margin-bottom: 2.75rem;
}

.concept--zurich .concept__number {
  color: #2554a6;
}

.concept--lausanne .concept__number {
  color: #7b3141;
}

.concept--lugano .concept__number {
  color: #8c3f22;
}

.concept h3 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 3vw, 3rem);
}

.concept__summary {
  margin-bottom: 1.5rem;
  color: var(--muted);
}

.portfolio-disclosure {
  max-width: 42rem;
  margin: -1.5rem 0 2.5rem auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

.concept__link {
  width: 100%;
  min-width: 0;
  margin-top: auto;
}

.approach {
  color: var(--paper);
  background: var(--ink);
  border-color: #4a4d4c;
}

.approach::before {
  background: #d54a58;
}

.approach .section-label,
.approach-grid span {
  color: #ee7a84;
}

.approach-grid {
  border-color: #737876;
}

.approach-grid li {
  border-color: #4a4d4c;
}

.approach-grid p {
  color: #c9cdcb;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(16rem, 0.8fr);
  gap: clamp(2rem, 6vw, 7rem);
}

.about .section-heading {
  display: block;
  margin-bottom: 0;
}

.about .section-label {
  margin-bottom: 2rem;
}

.about__copy {
  align-self: end;
  color: var(--muted);
  font-size: 1.05rem;
}

.about__copy p:last-child {
  margin-bottom: 0;
}

.contact {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(14rem, 0.6fr);
  gap: clamp(2rem, 5vw, 6rem);
  align-items: end;
  padding: clamp(5rem, 9vw, 9rem) clamp(1rem, 3vw, 3.5rem) clamp(3rem, 6vw, 6rem);
}

.contact > .coordinate {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.contact h2 {
  max-width: 12ch;
  margin-bottom: 0;
}

.contact > p:not(.coordinate) {
  color: var(--muted);
}

.contact__link {
  grid-column: 1 / -1;
  width: 100%;
  min-height: 4.5rem;
  padding-inline: clamp(1rem, 3vw, 2rem);
  color: #fff;
  border-color: var(--red);
  background: var(--red);
  font-size: clamp(0.8rem, 1.8vw, 1.15rem);
  overflow-wrap: anywhere;
}

.contact__link:hover {
  color: var(--ink);
  background: transparent;
}

.site-footer {
  color: #c9cdcb;
  background: var(--ink);
}

.site-footer__inner {
  min-height: 7rem;
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.5rem clamp(1rem, 3vw, 3.5rem);
  border-color: #4a4d4c;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: flex-end;
}

.site-footer a:focus-visible {
  outline-color: #fff;
}

@media (max-width: 64rem) {
  .hero {
    grid-template-columns: 5rem minmax(0, 1fr);
  }

  .hero::before {
    left: 5rem;
  }

  .hero::after {
    display: none;
  }

  .hero__note {
    grid-column: 2;
    max-width: 32rem;
    margin-top: 2rem;
    padding-left: clamp(1rem, 3vw, 3.5rem);
  }

  .language-band__inner {
    grid-template-columns: 1fr 1fr;
  }

  .language-band__copy {
    grid-column: 2;
  }

  .section-heading {
    grid-template-columns: minmax(6rem, 0.25fr) minmax(0, 1fr);
  }

  .section-heading > p:last-child,
  .section-heading--wide > p:last-child {
    grid-column: 2;
  }

  .section-heading--wide h2 {
    grid-column: 2;
  }

  .service-grid,
  .approach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-grid {
    grid-template-columns: 1fr;
  }

  .concept {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.85fr);
  }

  .concept figure {
    border-right: 1px solid var(--line-strong);
  }
}

@media (max-width: 48rem) {
  :root {
    --header-height: auto;
    --field: calc(100% - 1rem);
  }

  .site-header {
    position: relative;
  }

  .site-header__inner {
    display: block;
  }

  .wordmark {
    width: 100%;
    justify-content: flex-start;
    padding: 0.65rem;
    border-bottom: 1px solid var(--line);
  }

  .site-header nav {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .site-header nav a {
    min-width: 0;
    padding-inline: 0.25rem;
    border-left: 0;
    border-right: 1px solid var(--line);
    font-size: clamp(0.72rem, 2.4vw, 0.82rem);
    letter-spacing: 0.02em;
  }

  .site-header nav a:last-child {
    border-right: 0;
  }

  [id] {
    scroll-margin-top: 1rem;
  }

  .hero {
    min-height: 44rem;
    display: block;
    padding: 5.5rem 1rem 2rem;
  }

  .hero::before,
  .hero::after,
  .hero__index {
    display: none;
  }

  .coordinate--top {
    right: 1rem;
  }

  .hero__copy {
    padding-inline: 0;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 5.25rem);
  }

  .hero__note {
    max-width: 26rem;
    margin-top: 3rem;
    padding-left: 0;
  }

  .language-band__inner,
  .section-heading,
  .about,
  .contact {
    grid-template-columns: 1fr;
  }

  .language-band__copy,
  .section-heading > p:last-child,
  .section-heading--wide > p:last-child,
  .section-heading--wide h2,
  .contact__link {
    grid-column: 1;
  }

  .section-heading--wide > p:last-child {
    max-width: none;
  }

  .service-grid,
  .approach-grid {
    grid-template-columns: 1fr;
  }

  .service-grid span,
  .approach-grid span {
    margin-bottom: 2rem;
  }

  .concept {
    display: flex;
  }

  .concept figure {
    border-right: 0;
  }

  .about .section-heading {
    margin-bottom: 1rem;
  }

  .contact {
    align-items: start;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-block: 2rem;
  }

  .site-footer a {
    justify-content: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}