:root {
  --ink: #384046;
  --ink-soft: #4f5a62;
  --paper: #ffffff;
  --paper-2: #f7fbfe;
  --muted: #848484;
  --line: #e8eaec;
  --accent: #3498db;
  --accent-2: #5faee3;
  --accent-dark: #124364;
  --hero: #384046;
  --white: #ffffff;
  --nav-h: 70px;
  --max: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Sora", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.serif {
  font-family: "Fraunces", "Times New Roman", serif;
  font-optical-sizing: auto;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--white);
  padding: 8px 12px;
  z-index: 100;
}

.skip:focus {
  left: 12px;
  top: 12px;
}

/* Nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 15px;
  color: var(--accent);
  font-family: "Raleway", "Sora", sans-serif;
}

.logo img {
  height: 32px;
  width: auto;
  mix-blend-mode: multiply;
}

.logo span {
  color: var(--ink);
  letter-spacing: 0.12em;
  font-weight: 600;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.nav-links a {
  color: var(--ink-soft);
}

.nav-links-cta {
  display: none;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--white);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

/* Hero */

.hero {
  padding: 88px 0 96px;
  background: var(--hero);
  color: var(--white);
}

.hero-kicker {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 84px);
  line-height: 0.95;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  max-width: 16ch;
  color: var(--white);
}

.hero h1 span {
  display: inline-block;
  border-bottom: 4px solid var(--accent);
  padding-bottom: 2px;
}

.hero-lead {
  max-width: 42ch;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.btn-solid {
  background: var(--accent);
  color: var(--white);
}

.btn-solid:hover {
  background: #4ea5e0;
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.75);
  color: var(--white);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 28px;
  gap: 16px;
}

.hero-meta b {
  display: block;
  font-family: "Fraunces", serif;
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--white);
}

.hero-meta span {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.marquee {
  overflow: hidden;
  background: var(--accent);
  color: var(--white);
}

.marquee-track {
  display: flex;
  gap: 40px;
  width: max-content;
  padding: 14px 0;
  animation: marquee 42s linear infinite;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.marquee-track span::after {
  content: "·";
  margin-left: 40px;
  color: rgba(255, 255, 255, 0.55);
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Sections */

section {
  padding: 88px 0;
  scroll-margin-top: calc(var(--nav-h) + 8px);
}

.section-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}

.section-title {
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  max-width: 18ch;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin-top: 16px;
}

.section-copy {
  max-width: 54ch;
  color: var(--ink-soft);
  margin: 0 0 48px;
}

/* Approach */

.approach {
  background: var(--hero);
  color: var(--white);
  padding: 64px 0;
  margin-top: 8px;
}

.approach .section-label {
  color: var(--accent-2);
}

.approach .section-copy {
  color: rgba(255, 255, 255, 0.8);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.step {
  background: var(--hero);
  padding: 32px 28px;
  min-height: 260px;
}

.step-num {
  font-family: "Fraunces", serif;
  font-size: 40px;
  color: var(--accent);
  margin-bottom: 20px;
}

.step h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 500;
}

.step p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
}

/* Thesis */

.thesis-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.split-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.split-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

.split-list strong {
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Cases */

.cases {
  background: var(--paper-2);
}

.case {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.case:last-child {
  border-bottom: 1px solid var(--line);
}

.case-index {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.case h3 {
  font-size: clamp(28px, 3vw, 40px);
  margin: 8px 0 12px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  padding: 4px 8px;
  background: var(--paper);
}

.need,
.build {
  margin: 0 0 18px;
}

.need h4,
.build h4 {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.build h4 {
  color: var(--accent);
}

.need p,
.build p {
  margin: 0;
  color: var(--ink-soft);
}

.case a {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  border-bottom: 1px solid var(--ink);
}

/* Catalog */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter {
  border: 1px solid var(--line);
  padding: 8px 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.filter[aria-pressed="true"] {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.catalog {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--paper);
  padding: 28px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
}

.card[hidden] {
  display: none;
}

.card-kicker {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 24px;
  font-weight: 500;
}

.card p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  flex: 1;
}

.card-meta {
  font-size: 12px;
  color: var(--muted);
}

/* Stack */

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stack-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.stack-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* Contact */

.contact {
  background: var(--hero);
  color: var(--white);
  padding-bottom: 48px;
}

.contact .section-copy {
  color: rgba(255, 255, 255, 0.8);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  font-size: 18px;
}

.contact-row a {
  border-bottom: 1px solid var(--accent);
}

.footer {
  padding: 24px 0 40px;
  background: var(--hero);
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.entity {
  background: var(--paper-2);
}

.entity-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 48px;
  margin: 0;
}

.entity-grid div {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.entity-grid dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.entity-grid dd {
  margin: 0;
  color: var(--ink);
}

.faq-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "–";
}

.faq-list p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  max-width: 70ch;
}

/* Mobile */

@media (max-width: 900px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--paper);
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--line);
    gap: 16px;
  }

  .nav.open .nav-links-cta {
    display: list-item;
    margin-top: 8px;
  }

  .nav.open .nav-links-cta a {
    border: 1px solid var(--ink);
    padding: 8px 14px;
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

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

  .hero-meta,
  .steps,
  .thesis-grid,
  .case,
  .catalog,
  .stack-grid {
    grid-template-columns: 1fr;
  }

  .split-list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .hero {
    padding-top: 48px;
  }

  section {
    padding: 64px 0;
  }
}

@media (max-width: 640px) {
  .wrap,
  .nav-inner {
    width: min(var(--max), calc(100% - 32px));
  }

  .hero-meta {
    grid-template-columns: 1fr 1fr;
  }
}