:root {
  --color-white: #ffffff;
  --color-black: #111111;
  --color-ink: #1f1f1f;
  --color-muted: #606060;
  --color-soft: #8a8a8a;
  --color-line: #e8e8e8;
  --color-surface: #f7f7f7;
  --color-surface-strong: #efefef;
  --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.06);
  --max-width: 1180px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 32px);
}

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-black);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-black);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header-height);
  border-bottom: 1px solid rgba(232, 232, 232, 0.76);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 48px, var(--max-width));
  height: 100%;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-logo {
  width: auto;
  height: 24px;
}

.visually-hidden {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a,
.footer a,
.contact-links a {
  transition: color 180ms ease, opacity 180ms ease;
}

.nav-links a:hover,
.footer a:hover,
.contact-links a:hover {
  color: var(--color-black);
}

.nav-links a[aria-current="page"] {
  color: var(--color-black);
}

.section-inner {
  width: min(100% - 48px, var(--max-width));
  margin: 0 auto;
}

.hero {
  padding: 104px 0 88px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.66fr);
  gap: 72px;
  align-items: end;
}

.hero-copy {
  max-width: 840px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--color-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

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

h1 {
  max-width: 960px;
  margin-bottom: 28px;
  color: var(--color-black);
  font-size: 64px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 0.98;
}

h2 {
  margin-bottom: 0;
  color: var(--color-black);
  font-size: 40px;
  font-weight: 750;
  letter-spacing: 0;
  line-height: 1.1;
}

h3 {
  margin-bottom: 14px;
  color: var(--color-black);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.18;
}

.hero-subtitle {
  max-width: 720px;
  margin-bottom: 34px;
  color: var(--color-muted);
  font-size: 21px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-black);
  border-radius: 8px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 650;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--color-black);
  color: var(--color-white);
}

.button-primary:hover {
  background: var(--color-ink);
}

.button-secondary {
  background: var(--color-white);
  color: var(--color-black);
}

.button-secondary:hover {
  background: var(--color-surface);
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  object-fit: cover;
}

.hero-visual figcaption {
  max-width: 360px;
  margin-top: 16px;
  color: var(--color-soft);
  font-size: 13px;
  line-height: 1.45;
}

.work,
.about,
.thinking,
.contact {
  padding: 108px 0;
  border-top: 1px solid var(--color-line);
}

.section-heading {
  margin-bottom: 44px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.project-card {
  display: block;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-white);
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.project-card:hover {
  border-color: #d5d5d5;
  box-shadow: var(--shadow-soft);
  transform: translateY(-4px);
}

.project-card img {
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--color-line);
  object-fit: cover;
  transition: transform 220ms ease;
}

.project-card:hover img {
  transform: scale(1.015);
}

.project-content {
  padding: 28px;
}

.project-index {
  margin-bottom: 22px;
  color: var(--color-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.project-card p:not(.project-index) {
  margin-bottom: 24px;
  color: var(--color-muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.38fr) minmax(0, 0.62fr);
  gap: 72px;
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: calc(var(--header-height) + 36px);
  margin-bottom: 0;
}

.about-copy {
  max-width: 760px;
}

.about-copy p {
  margin-bottom: 26px;
  color: var(--color-ink);
  font-size: 24px;
  line-height: 1.5;
}

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

.principle-list {
  display: grid;
  gap: 0;
  max-width: 760px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-line);
}

.principle-list li {
  display: flex;
  min-height: 78px;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
  font-size: 22px;
  font-weight: 550;
  line-height: 1.35;
}

.contact-panel {
  padding: 72px 0 0;
}

.contact h2 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: 56px;
}

.contact p:not(.eyebrow) {
  max-width: 600px;
  margin-bottom: 36px;
  color: var(--color-muted);
  font-size: 21px;
}

.contact-links {
  display: grid;
  gap: 12px;
  max-width: 640px;
  color: var(--color-black);
  font-size: 24px;
  font-weight: 650;
  line-height: 1.35;
}

.contact-links a {
  width: fit-content;
  border-bottom: 1px solid var(--color-line);
  overflow-wrap: anywhere;
}

.footer {
  padding: 34px 0;
  border-top: 1px solid var(--color-line);
  color: var(--color-soft);
  font-size: 14px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer p {
  margin-bottom: 0;
}

.case-nav {
  align-items: center;
  justify-content: space-between;
  width: min(100% - 48px, var(--max-width));
  max-width: none;
  height: 100%;
}

.case-nav .brand,
.case-nav .back-link {
  display: inline-flex;
  align-items: center;
}

.back-link {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 600;
  transition: color 180ms ease;
}

.back-link:hover {
  color: var(--color-black);
}

.case-page {
  background: var(--color-white);
}

.case-container {
  width: min(100% - 48px, 860px);
  margin: 0 auto;
}

.case-hero {
  padding: 108px 0 76px;
}

.case-hero h1 {
  max-width: 860px;
  margin-bottom: 22px;
  font-size: 64px;
  line-height: 1;
}

.case-subtitle {
  max-width: 760px;
  margin-bottom: 28px;
  color: var(--color-muted);
  font-size: 24px;
  line-height: 1.45;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-meta span {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: 12px;
  font-weight: 650;
}

.case-section {
  padding: 72px 0;
  border-top: 1px solid var(--color-line);
}

.case-section h2 {
  margin-bottom: 26px;
  font-size: 32px;
  line-height: 1.16;
}

.case-section h3 {
  margin-bottom: 14px;
  font-size: 22px;
}

.case-section p {
  max-width: 780px;
  margin-bottom: 18px;
  color: var(--color-ink);
  font-size: 19px;
  line-height: 1.72;
}

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

.challenge-quote {
  margin: 34px 0 42px;
  border-left: 3px solid var(--color-black);
  padding: 4px 0 4px 24px;
  color: var(--color-black);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.3;
}

.case-image-block {
  margin: 44px 0 0;
}

.case-image-block img {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  object-fit: cover;
  filter: grayscale(1);
}

.case-image-block figcaption {
  margin-top: 12px;
  color: var(--color-soft);
  font-size: 13px;
  line-height: 1.45;
}

.case-subsection {
  margin-top: 70px;
  padding-top: 44px;
  border-top: 1px solid var(--color-line);
}

.collaboration-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 34px;
}

.collaboration-block {
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}

.collaboration-block ul,
.impact-list,
.takeaway-list,
.case-link-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.collaboration-block li,
.impact-list li,
.takeaway-list li,
.case-link-list li {
  position: relative;
  padding-left: 22px;
  color: var(--color-ink);
  font-size: 17px;
  line-height: 1.6;
}

.collaboration-block li + li,
.impact-list li + li,
.takeaway-list li + li,
.case-link-list li + li {
  margin-top: 10px;
}

.collaboration-block li::before,
.impact-list li::before,
.takeaway-list li::before,
.case-link-list li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-black);
  content: "";
}

.impact-list {
  margin-top: 24px;
  margin-bottom: 30px;
}

.case-link-list {
  display: grid;
  gap: 0;
  margin-top: 28px;
  border-top: 1px solid var(--color-line);
}

.case-link-list li {
  display: flex;
  min-height: 58px;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  padding-left: 0;
  font-size: 18px;
  font-weight: 650;
}

.case-link-list li::before {
  display: none;
}

.case-link-list a {
  color: var(--color-black);
  transition: color 180ms ease, padding-left 180ms ease;
}

.case-link-list a::after {
  color: var(--color-soft);
  content: " ->";
}

.case-link-list a:hover {
  color: var(--color-muted);
  padding-left: 6px;
}

.takeaway-list {
  margin-top: 30px;
  border-top: 1px solid var(--color-line);
}

.takeaway-list li {
  display: flex;
  min-height: 68px;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
  font-size: 19px;
  font-weight: 650;
}

.takeaway-list li::before {
  top: 50%;
  transform: translateY(-50%);
}

.case-final {
  padding: 84px 0 108px;
  border-top: 1px solid var(--color-line);
}

.next-case {
  display: block;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 28px 0;
  color: var(--color-black);
  font-size: 26px;
  font-weight: 750;
  line-height: 1.25;
  transition: color 180ms ease, padding-left 180ms ease;
}

.next-case span {
  display: block;
  margin-bottom: 8px;
  color: var(--color-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

.next-case::before {
  content: "-> ";
}

.previous-case::before {
  content: "<- ";
}

.next-case:hover {
  padding-left: 8px;
  color: var(--color-ink);
}

.js .section-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms ease, transform 520ms ease;
}

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

@media (max-width: 1060px) {
  h1 {
    font-size: 54px;
  }

  .hero-grid,
  .split-section {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    max-width: 520px;
  }

  .sticky-heading {
    position: static;
  }

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

@media (max-width: 760px) {
  :root {
    --header-height: 64px;
  }

  .nav,
  .section-inner {
    width: min(100% - 32px, var(--max-width));
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 72px 0 68px;
  }

  h1 {
    font-size: 42px;
    line-height: 1.04;
  }

  h2 {
    font-size: 32px;
  }

  h3 {
    font-size: 22px;
  }

  .hero-subtitle,
  .contact p:not(.eyebrow) {
    font-size: 18px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .work,
  .about,
  .thinking,
  .contact {
    padding: 76px 0;
  }

  .section-heading {
    margin-bottom: 34px;
  }

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

  .project-content {
    padding: 24px;
  }

  .about-copy p,
  .principle-list li,
  .contact-links {
    font-size: 19px;
  }

  .case-container {
    width: min(100% - 32px, 860px);
  }

  .case-hero {
    padding: 76px 0 58px;
  }

  .case-hero h1 {
    font-size: 42px;
    line-height: 1.05;
  }

  .case-subtitle {
    font-size: 19px;
  }

  .case-section {
    padding: 58px 0;
  }

  .case-section h2 {
    font-size: 28px;
  }

  .case-section p {
    font-size: 17px;
  }

  .challenge-quote {
    margin: 28px 0 34px;
    padding-left: 18px;
    font-size: 22px;
  }

  .case-image-block {
    margin-top: 34px;
  }

  .case-subsection {
    margin-top: 54px;
    padding-top: 34px;
  }

  .collaboration-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .takeaway-list li {
    min-height: 62px;
    font-size: 17px;
  }

  .case-final {
    padding: 64px 0 82px;
  }

  .next-case {
    font-size: 22px;
  }

  .principle-list li {
    min-height: 68px;
  }

  .contact-panel {
    padding-top: 32px;
  }

  .contact h2 {
    font-size: 40px;
  }
}

@media (max-width: 480px) {
  .site-header {
    height: auto;
    min-height: var(--header-height);
  }

  .nav {
    align-items: center;
    flex-direction: row;
    justify-content: center;
    padding: 0;
  }

  .case-nav {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
    min-height: var(--header-height);
    padding: 0;
  }

  h1 {
    font-size: 36px;
  }

  .contact h2 {
    font-size: 36px;
  }

  .tags span {
    white-space: normal;
  }

  .footer-content {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

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