@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap");

:root {
  --bg: #f6f6f6;
  --surface: #ffffff;
  --text: #161616;
  --muted: #575757;
  --line: #d9d9d9;
  --chip: #ececec;
  --chip-active: #161616;
  --chip-active-text: #ffffff;
  --max: 1160px;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Space Grotesk", "Avenir Next", "Helvetica Neue", Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, #ffffff 0, #f8f8f8 30%, #f3f3f3 70%, #efefef 100%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration-color: #9b9b9b;
  text-underline-offset: 0.2rem;
}

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

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--text);
}

.hero {
  padding: 5.25rem 0 2.75rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  font-weight: 600;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.8rem;
}

h1 {
  font-size: clamp(2rem, 4.7vw, 3.8rem);
  max-width: 16.5ch;
}

h2 {
  font-size: clamp(1.45rem, 2.2vw, 2rem);
}

h3 {
  font-size: 1.2rem;
}

.lede {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: #2f2f2f;
  max-width: 64ch;
}

.narrow {
  max-width: 70ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.btn {
  border: 1px solid #b8b8b8;
  border-radius: 999px;
  padding: 0.62rem 1.1rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.94rem;
}

.btn-primary {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.section {
  padding: 2.3rem 0;
}

.summary {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 2rem 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfbfb;
  padding: 1.25rem;
}

.card p {
  margin: 0.55rem 0;
}

.card-kicker {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  font-weight: 650;
}

.inline-link {
  font-weight: 650;
}

.about p,
.contact p {
  max-width: 72ch;
}

.filters {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.filter-label {
  margin: 0 0.45rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
  min-width: 6rem;
}

.chip {
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--text);
  border-radius: 999px;
  padding: 0.44rem 0.82rem;
  font-size: 0.84rem;
  cursor: pointer;
}

.chip.active {
  background: var(--chip-active);
  color: var(--chip-active-text);
  border-color: var(--chip-active);
}

.count {
  margin: 1.1rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.project-grid {
  margin-bottom: 2.25rem;
}

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

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

.tag {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  font-size: 0.74rem;
  color: #3b3b3b;
}

.case .card ul {
  margin: 0;
  padding-left: 1.1rem;
}

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

.case-back {
  margin-top: 1.3rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
}

.footer-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-wrap p {
  margin: 0;
  color: var(--muted);
}

/* ─── Case Study Pages ─────────────────────────────────────── */

.case {
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}

.case h1 {
  max-width: 22ch;
  margin-top: 0.5rem;
}

/* Stats bar */
.case-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 2.5rem 0 0;
}

.case-stat {
  background: #fafafa;
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.case-stat-num {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.case-stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

/* Sections */
.case-section {
  border-top: 1px solid var(--line);
  padding: 2.8rem 0 0.5rem;
  margin-top: 2.8rem;
}

.case-section h2 {
  max-width: 38ch;
}

.case-section p {
  max-width: 72ch;
  margin: 0 0 0.9rem;
}

.case-section h3 {
  margin-bottom: 0.35rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.65rem;
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
}

/* Images */
.case-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #f0f0f0;
}

.case-img-wrap {
  margin: 1.75rem 0 0.5rem;
}

.case-img-caption {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0.55rem 0 0;
  line-height: 1.5;
  max-width: 72ch;
}

figure {
  margin: 0;
}

figure figcaption {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.img-2col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0 0.5rem;
}

/* Process list */
.process-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 1.5rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.process-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.4rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: #fafafa;
}

.process-item:last-child {
  border-bottom: none;
}

.process-num {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  min-width: 2rem;
  padding-top: 0.2rem;
}

.process-body {
  flex: 1;
}

.process-body h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.process-body p {
  margin: 0;
  font-size: 0.95rem;
  max-width: 62ch;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.team-block {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  background: #fafafa;
}

.team-block h4 {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.team-block ul {
  margin: 0;
  padding-left: 1rem;
  font-size: 0.92rem;
}

.team-block li {
  margin-bottom: 0.2rem;
}

/* Artifact grid */
.artifact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.5rem 0;
}

.artifact-item {
  background: #fafafa;
  padding: 1.1rem 1.25rem;
}

.artifact-item h4 {
  margin: 0 0 0.3rem;
  font-size: 0.92rem;
  font-weight: 700;
}

.artifact-item p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Decisions grid */
.decisions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.decision-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  background: #fafafa;
}

.decision-item h4 {
  margin: 0 0 0.45rem;
  font-size: 0.97rem;
  font-weight: 700;
}

.decision-item p {
  margin: 0;
  font-size: 0.91rem;
  color: #3a3a3a;
  line-height: 1.55;
}

/* Case back link */
.case-back {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

/* ─────────────────────────────────────────────────────────── */

@media (max-width: 980px) {
  .grid.three,
  .grid.two,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 4rem;
  }

  h1 {
    max-width: 100%;
  }

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

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

  .decisions-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .case-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .img-2col {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .container {
    width: min(100% - 1.35rem, var(--max));
  }

  .nav-wrap {
    min-height: 64px;
  }

  .site-nav {
    gap: 0.75rem;
  }

  .site-nav a {
    font-size: 0.87rem;
  }

  .filter-label {
    width: 100%;
    margin-bottom: 0.2rem;
  }
}