:root {
  --ink: #000000;
  --paper: #ffffff;
  --steel: #5f5f66;
  --mist: #e4e4e7;
  --fog: #f4f4f5;
  --signal: #2f45ff;
  --signal-soft: #9aa6ff;

  --display: 'Geologica', system-ui, sans-serif;
  --text: 'Onest', system-ui, -apple-system, 'Segoe UI', sans-serif;

  --gutter: clamp(16px, 4vw, 40px);
  --chamfer: 12px;
  --header: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

[hidden] { display: none !important; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
img, svg, canvas { display: block; max-width: 100%; }
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
button, input, textarea { font: inherit; color: inherit; }

::selection { background: var(--signal); color: var(--paper); }

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

.wrap {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.skip:focus { top: 12px; }

/* ---------- Buttons: the chamfer is borrowed from the logo's top-right corner ---------- */

.btn {
  --c: var(--chamfer);
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 28px;
  border: 0;
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - var(--c)) 0, 100% var(--c), 100% 100%, 0 100%);
  transition: background-color .2s, color .2s, transform .2s;
}
.btn:active { transform: translateY(1px); }
.btn--sm { min-height: 42px; padding: 0 20px; font-size: 15px; --c: 10px; }

.btn--ink { background: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--signal); }

.btn--paper { background: var(--paper); color: var(--ink); }
.btn--paper:hover { background: var(--signal-soft); }
.btn--paper[disabled] { opacity: .6; cursor: progress; }

/* Outlined chamfer: an ink plate with a paper plate inset by the border width. */
.btn--line,
.btn--line-inv { background: transparent; }
.btn--line::before,
.btn--line::after,
.btn--line-inv::before,
.btn--line-inv::after {
  content: '';
  position: absolute;
  z-index: -1;
  transition: opacity .2s;
}
.btn--line::before,
.btn--line-inv::before { inset: 0; }
.btn--line::after,
.btn--line-inv::after {
  inset: 1.5px;
  clip-path: polygon(0 0, calc(100% - var(--c) + .6px) 0, 100% calc(var(--c) - .6px), 100% 100%, 0 100%);
}
.btn--line { color: var(--ink); }
.btn--line::before { background: var(--ink); }
.btn--line::after { background: var(--paper); }
.btn--line:hover { color: var(--paper); }
.btn--line:hover::after { opacity: 0; }

.btn--line-inv { color: var(--paper); }
.btn--line-inv::before { background: var(--paper); }
.btn--line-inv::after { background: var(--ink); }
.btn--line-inv:hover { color: var(--ink); }
.btn--line-inv:hover::after { opacity: 0; }

/* ---------- Header ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.top.is-scrolled { border-bottom-color: var(--mist); }

.top__row {
  display: flex;
  align-items: center;
  gap: 32px;
  height: var(--header);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand__mark { width: 30px; height: auto; fill: var(--ink); }
.brand__name { font: 700 22px/1 var(--display); letter-spacing: -.01em; }
.brand--inv .brand__mark { fill: var(--paper); }

.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}
.nav a {
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  color: var(--steel);
  transition: color .2s;
}
.nav a:hover { color: var(--ink); }

.top__tools {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang { display: flex; }
.lang button {
  min-width: 36px;
  height: 32px;
  padding: 0 6px;
  border: 0;
  background: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--steel);
  cursor: pointer;
}
.lang button[aria-pressed='true'] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--ink); }
.lang button:hover { color: var(--ink); }

/* ---------- Hero ---------- */

.hero { padding: clamp(24px, 3vw, 48px) 0 clamp(64px, 9vw, 128px); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(32px, 5vw, 80px);
}

.hero__studio {
  margin-bottom: 20px;
  font-weight: 500;
  color: var(--steel);
}

.hero__title {
  font: 600 clamp(42px, 6.2vw, 88px)/1 var(--display);
  letter-spacing: -.025em;
  text-wrap: balance;
}

.hero__lead {
  max-width: 34em;
  margin-top: 28px;
  font-size: clamp(17px, 1.4vw, 19px);
  color: var(--steel);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}

.hero__mark {
  position: relative;
  justify-self: center;
  align-self: start;
  width: 100%;
  /* Keep the whole mark and its hint on the first screen, even on short laptop displays. */
  max-width: min(540px, max(320px, calc(100svh - var(--header) - 150px)));
}
.hero__mark canvas {
  width: 100%;
  aspect-ratio: 323 / 318;
  cursor: crosshair;
  touch-action: manipulation;
}
.hero__fallback { display: none; width: 100%; fill: var(--ink); }
.no-canvas .hero__mark canvas { display: none; }
.no-canvas .hero__fallback { display: block; }

.hero__hint {
  margin-top: 18px;
  font-size: 14px;
  color: var(--steel);
  text-align: center;
}

/* The page's one orchestrated moment: text settles while the mark assembles. */
.js .hero__text > * {
  opacity: 0;
  transform: translateY(14px);
  animation: rise .8s cubic-bezier(.2, .7, .2, 1) forwards;
}
.js .hero__text > :nth-child(2) { animation-delay: .12s; }
.js .hero__text > :nth-child(3) { animation-delay: .5s; }
.js .hero__text > :nth-child(4) { animation-delay: .7s; }
.js .hero__hint { opacity: 0; animation: fade .6s 1.8s forwards; }

@keyframes rise { to { opacity: 1; transform: none; } }
@keyframes fade { to { opacity: 1; } }

/* ---------- Sections ---------- */

.section { padding: clamp(72px, 10vw, 136px) 0; }
.section--fog { background: var(--fog); }

.section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
  gap: 24px 64px;
  margin-bottom: clamp(40px, 6vw, 72px);
}
.section__head p { max-width: 32em; color: var(--steel); }

h2 {
  font: 600 clamp(34px, 4.4vw, 60px)/1.04 var(--display);
  letter-spacing: -.02em;
}

h3 { font: 600 24px/1.2 var(--display); letter-spacing: -.01em; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tags li {
  padding: 4px 10px;
  border: 1px solid var(--mist);
  font-size: 13px;
  font-weight: 500;
  color: var(--steel);
}

/* Services */

.service {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, .9fr);
  align-items: start;
  gap: 16px 48px;
  padding: 32px 0;
  border-top: 1px solid var(--mist);
}
.service:last-child { border-bottom: 1px solid var(--mist); }
.service h3 { font-size: clamp(22px, 2.2vw, 28px); }
.service p { color: var(--steel); max-width: 34em; }
.service .tags { justify-content: flex-end; }

/* Cases */

.cases {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
@media (max-width: 1100px) { .cases { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* The outline is the card's own background showing through a 1px gap around
   a white ::before, so it follows the chamfered corner too. */
.case {
  --c: 28px;
  --line: #d4d4d8;
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  padding: 20px 20px 24px;
  background: var(--line);
  color: var(--ink);
  clip-path: polygon(0 0, calc(100% - var(--c)) 0, 100% var(--c), 100% 100%, 0 100%);
  transition: background-color .2s;
}
.case::before {
  content: "";
  position: absolute;
  inset: 1px;
  z-index: -1;
  background: var(--paper);
  /* 1px inset shrinks a 45° chamfer by 2 - √2 px. */
  clip-path: polygon(0 0, calc(100% - var(--c) + .59px) 0, 100% calc(var(--c) - .59px), 100% 100%, 0 100%);
}
.case:hover { background: var(--ink); }
.case__logo {
  display: grid;
  place-items: center;
  height: 120px;
  margin-bottom: 20px;
  padding: 8px 8px 20px;
  border-bottom: 1px solid var(--mist);
}
.case__logo img,
.case__svg {
  display: block;
  width: auto;
  max-width: 78%;
  height: auto;
  max-height: 64px;
}
.case__svg { width: 78%; }
.case__kind { font-size: 14px; color: var(--steel); }
.case__name {
  margin-top: 6px;
  font: 700 clamp(26px, 2.4vw, 32px)/1.05 var(--display);
  letter-spacing: -.02em;
}
.case__text {
  margin: 14px 0 20px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
}
.case .tags { margin-top: auto; }
.case__link {
  align-self: flex-start;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  text-underline-offset: 4px;
}
.case__link::after { content: " ↗"; }
.case__link:hover { color: var(--signal); }

.partners {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 16px 48px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--mist);
}
.partners__title {
  font-size: 15px;
  font-weight: 500;
  color: var(--steel);
}
.partners__list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 48px;
  font: 600 clamp(22px, 2.4vw, 32px)/1.1 var(--display);
  letter-spacing: -.01em;
}

/* Process */

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  counter-reset: none;
}
.step {
  padding-top: 22px;
  border-top: 2px solid var(--ink);
}
.step__n {
  display: block;
  margin-bottom: 28px;
  font: 700 56px/1 var(--display);
}
.step h3 { margin-bottom: 10px; }
.step p { color: var(--steel); }

/* FAQ */

.faq {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: 32px 64px;
  align-items: start;
}
.faq h2 { position: sticky; top: calc(var(--header) + 32px); }

.faq__list details { border-bottom: 1px solid var(--mist); }
.faq__list details:first-child { border-top: 1px solid var(--mist); }
.faq__list summary {
  position: relative;
  padding: 24px 48px 24px 0;
  font: 500 clamp(19px, 1.8vw, 22px)/1.3 var(--display);
  list-style: none;
  cursor: pointer;
}
.faq__list summary::-webkit-details-marker { display: none; }
.faq__list summary::before,
.faq__list summary::after {
  content: '';
  position: absolute;
  right: 6px;
  top: 50%;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .25s;
}
.faq__list summary::after { transform: rotate(90deg); }
.faq__list details[open] summary::after { transform: rotate(0deg); }
.faq__list details p {
  max-width: 36em;
  padding: 0 48px 26px 0;
  color: var(--steel);
}

/* ---------- Contact: the logo's bottom notch cuts into the top edge ---------- */

.contact {
  --notch: clamp(36px, 5vw, 64px);
  position: relative;
  padding: calc(var(--notch) + clamp(56px, 8vw, 104px)) 0 clamp(72px, 9vw, 120px);
  background: var(--ink);
  color: var(--paper);
  clip-path: polygon(0 0, calc(50% - var(--notch)) 0, 50% var(--notch), calc(50% + var(--notch)) 0, 100% 0, 100% 100%, 0 100%);
}

.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 48px 80px;
  align-items: start;
}
.contact__intro p {
  max-width: 26em;
  margin-top: 24px;
  color: rgba(255, 255, 255, .72);
  font-size: 18px;
}

.contact :focus-visible { outline-color: var(--signal-soft); }

.form__body { display: grid; gap: 28px; }

.field { margin: 0; padding: 0; border: 0; min-width: 0; }
.field label,
.field legend {
  display: block;
  margin-bottom: 8px;
  padding: 0;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, .7);
}
.field input,
.field textarea {
  display: block;
  width: 100%;
  padding: 10px 0 12px;
  border: 0;
  border-bottom: 1.5px solid rgba(255, 255, 255, .3);
  border-radius: 0;
  background: transparent;
  font-size: 19px;
  transition: border-color .2s;
}
.field textarea { resize: vertical; min-height: 104px; line-height: 1.5; }
.field input::placeholder,
.field textarea::placeholder { color: rgba(255, 255, 255, .34); }
.field input:hover,
.field textarea:hover { border-bottom-color: rgba(255, 255, 255, .55); }
.field input:focus,
.field textarea:focus { outline: none; border-bottom-color: var(--paper); }
.field input:focus-visible,
.field textarea:focus-visible { box-shadow: 0 1.5px 0 var(--signal-soft); border-bottom-color: var(--signal-soft); }
.field [aria-invalid='true'] { border-bottom-color: #ff8a7a; }

.field__error {
  margin-top: 8px;
  font-size: 14px;
  color: #ff8a7a;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; margin: 0 !important; cursor: pointer; }
.chip input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.chip span {
  display: inline-block;
  padding: 9px 15px;
  border: 1px solid rgba(255, 255, 255, .28);
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, .86);
  transition: background-color .15s, color .15s, border-color .15s;
}
.chip:hover span { border-color: rgba(255, 255, 255, .6); }
.chip input:checked + span { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--signal-soft); outline-offset: 2px; }

.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form__submit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 4px;
}
.form__note {
  flex: 1 1 220px;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
}
.form__status {
  padding: 14px 16px;
  border-left: 2px solid #ff8a7a;
  background: rgba(255, 138, 122, .08);
  font-size: 15px;
}

.form__done { padding: 8px 0; }
.form__done:focus { outline: none; }
.form__done h3 { font-size: clamp(28px, 3vw, 40px); margin: 28px 0 12px; }
.form__done p { color: rgba(255, 255, 255, .72); margin-bottom: 32px; max-width: 28em; }
.form__done-mark { width: 120px; }
.done-o {
  fill: none;
  stroke: var(--paper);
  stroke-width: 10;
  stroke-dasharray: 1 1;
  stroke-dashoffset: 1;
}
.done-check {
  fill: none;
  stroke: var(--paper);
  stroke-width: 22;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1 1;
  stroke-dashoffset: 1;
}
.form__done:not([hidden]) .done-o { animation: draw .9s cubic-bezier(.65, 0, .35, 1) forwards; }
.form__done:not([hidden]) .done-check { animation: draw .45s .75s ease-out forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ---------- Footer ---------- */

.foot {
  background: var(--ink);
  color: rgba(255, 255, 255, .6);
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.foot__row {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 96px;
  font-size: 14px;
}
.foot .brand { color: var(--paper); margin-right: auto; }
.foot__up { color: var(--paper); text-underline-offset: 4px; }

/* ---------- Responsive ---------- */

@media (max-width: 1000px) {
  .nav { display: none; }
  .top__tools { margin-left: auto; }
  .service { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .service .tags { grid-column: 2; justify-content: flex-start; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 32px; }
}

@media (max-width: 860px) {
  .hero__grid,
  .section__head,
  .contact__grid,
  .faq { grid-template-columns: minmax(0, 1fr); }
  .hero__mark { max-width: 400px; order: -1; }
  .faq h2 { position: static; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .top__row { gap: 12px; }
  .top__tools { gap: 8px; }
  .top .btn--sm { display: none; }

  .hero { padding: 12px 0 44px; }
  .hero__grid { gap: 20px; }
  .hero__mark { max-width: 220px; }
  .hero__hint { margin-top: 10px; font-size: 13px; }
  .hero__studio { margin-bottom: 12px; }
  .hero__title { font-size: 34px; }
  .hero__lead { margin-top: 16px; font-size: 16px; }
  .hero__actions { margin-top: 24px; gap: 8px; }
  .hero__actions .btn { flex: 1 1 100%; }
  .btn { min-height: 46px; }

  .section { padding: 48px 0; }
  .section__head { gap: 10px; margin-bottom: 24px; }
  h2 { font-size: 28px; }
  h3 { font-size: 19px; }
  .tags li { padding: 3px 8px; font-size: 12px; }

  .service { grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 18px 0; }
  .service h3 { font-size: 19px; }
  .service .tags { grid-column: auto; }

  /* Projects: two compact cards per row. */
  .cases { gap: 10px; }
  .case { --c: 16px; padding: 12px 12px 14px; }
  .case__logo { height: 64px; margin-bottom: 10px; padding: 4px 2px 10px; }
  .case__logo img,
  .case__svg { max-width: 88%; max-height: 34px; }
  .case__svg { width: 88%; }
  .case__kind { font-size: 11px; line-height: 1.3; }
  .case__name { margin-top: 2px; font-size: 18px; }
  .case__text { margin: 8px 0 10px; font-size: 13px; line-height: 1.4; }
  /* Tags repeat what the description says; on a phone they only add height. */
  .case .tags { display: none; }
  .case__text { margin-bottom: 0; }
  .case__link { margin-top: auto; padding-top: 10px; font-size: 12px; }

  .partners { gap: 8px 24px; margin-top: 28px; padding-top: 18px; }
  .partners__title { flex: 1 1 100%; font-size: 13px; }
  .partners__list { gap: 6px 24px; font-size: 20px; }

  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 16px; }
  .step { padding-top: 14px; }
  .step__n { font-size: 32px; margin-bottom: 10px; }
  .step h3 { font-size: 17px; margin-bottom: 6px; }
  .step p { font-size: 14px; }

  .faq { gap: 16px; }
  .faq__list summary { padding: 16px 36px 16px 0; font-size: 16px; }
  .faq__list details p { padding: 0 0 16px; font-size: 14px; }

  .contact { --notch: 28px; padding: calc(var(--notch) + 36px) 0 48px; }
  .contact__grid { gap: 28px; }
  .contact__intro p { margin-top: 12px; font-size: 15px; }
  .form__body { gap: 20px; }
  .field input,
  .field textarea { font-size: 17px; }
  .chip span { padding: 7px 12px; font-size: 14px; }

  .foot__row { flex-wrap: wrap; padding: 20px var(--gutter); gap: 8px 20px; }
  .foot .brand { flex: 1 1 100%; margin-bottom: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-delay: 0s !important;
    transition-duration: .01ms !important;
  }
}