:root {
  --black: #000000;
  --white: #ffffff;
  --gray: #666666;
  --line: #000000;
  --border: 1px solid var(--line);
  --border-thick: 2px solid var(--line);
  --sans: 'Cantarell', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --display: 'Megrim', ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

h1, h2, h3 { margin: 0; font-weight: 400; }

em {
  font-style: normal;
  font-family: var(--display);
  letter-spacing: 0.01em;
}

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

.site-header {
  border-bottom: var(--border-thick);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 50;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
}

.logo {
  font-family: var(--display);
  font-size: 26px;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 0;
}

.nav-links a {
  text-decoration: none;
  padding: 8px 20px;
  border-left: var(--border);
  font-size: 13px;
  letter-spacing: 0.02em;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:last-child {
  border-right: var(--border);
}

.nav-links a:hover {
  background: var(--black);
  color: var(--white);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border: var(--border);
  background: var(--white);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--black);
  margin: 0 8px;
}

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

.hero {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  padding: 72px 32px;
  align-items: center;
  border-bottom: var(--border-thick);
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.02em;
  margin: 0 0 20px;
  color: var(--black);
}

.hero h1 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(30px, 4.2vw, 50px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 36px;
}

.hero h1 em {
  font-size: 1.08em;
}

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

.btn {
  display: inline-block;
  font-family: var(--display);
  font-size: 18px;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 16px 28px;
  border: var(--border-thick);
  cursor: pointer;
  position: relative;
  transition: transform 0.12s ease;
}

.btn-primary {
  background: var(--black);
  color: var(--white);
  box-shadow: 6px 6px 0 0 var(--black);
  margin-right: 6px;
}

.btn-primary:hover {
  transform: translate(3px, 3px);
  box-shadow: 3px 3px 0 0 var(--black);
}

.btn-ghost {
  background: var(--white);
  color: var(--black);
}

.btn-ghost:hover {
  background: var(--black);
  color: var(--white);
}

.hero-graphic {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: var(--border-thick);
  aspect-ratio: 1 / 1;
}

.grid-box {
  border: var(--border);
  position: relative;
  cursor: pointer;
  background: var(--white);
  transition: background-color 0.4s ease;
}

.grid-box.filled {
  background: var(--black);
  transition: background-color 0.4s ease;
}

.grid-box::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  background: var(--black);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  transition: background-color 0.4s ease, transform 0.2s ease;
}

.grid-box.filled::after {
  background: var(--white);
}

.grid-box:hover {
  background: var(--black);
}

.grid-box:hover::after {
  background: var(--white);
  transform: translate(-50%, -50%) scale(1.6);
}

/* ---------- Section shared ---------- */

.section-label {
  font-family: var(--display);
  font-size: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 20px 32px;
  border-bottom: var(--border);
  max-width: 1400px;
  margin: 0 auto;
}

.what-we-do, .how-we-work {
  border-bottom: var(--border-thick);
}

.two-col, .steps {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
}

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

.steps {
  grid-template-columns: repeat(4, 1fr);
}

.box-card {
  padding: 40px 32px;
  border-right: var(--border);
  border-bottom: none;
}

.two-col .box-card:last-child,
.steps .step:last-child {
  border-right: none;
}

.box-num {
  display: block;
  font-size: 13px;
  color: var(--gray);
  margin-bottom: 24px;
}

.box-card h3 {
  font-family: var(--display);
  font-size: 28px;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.box-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
  max-width: 34ch;
}

/* ---------- CTA band ---------- */

.cta-band {
  max-width: 1400px;
  margin: 0 auto;
  padding: 88px 32px;
  text-align: center;
  border-bottom: var(--border-thick);
}

.cta-band h2 {
  font-family: var(--display);
  font-size: clamp(30px, 4.5vw, 48px);
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.cta-band p {
  color: var(--gray);
  margin: 0 0 32px;
  font-size: 15px;
}

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

.site-footer {
  padding: 0;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.copyright {
  font-size: 13px;
  color: var(--gray);
  margin: 0;
}

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  text-decoration: none;
  font-size: 13px;
  border-bottom: 1px solid transparent;
}

.social-links a:hover {
  border-bottom-color: var(--black);
}

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

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 48px 24px;
  }

  .hero-graphic {
    display: none;
  }

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

  .two-col .box-card {
    border-right: none;
    border-bottom: var(--border);
  }

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

  .steps .step {
    border-bottom: var(--border);
  }

  .steps .step:nth-child(2n) {
    border-right: none;
  }
}

@media (max-width: 640px) {
  .header-inner { padding: 16px 20px; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    border-top: var(--border);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    border-left: none;
    border-bottom: var(--border);
    padding: 16px 20px;
  }

  .nav-links a:last-child {
    border-right: none;
  }

  .nav-toggle {
    display: flex;
  }

  .section-label, .box-card, .cta-band, .footer-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .steps .step:nth-child(2n) {
    border-right: none;
  }

  .btn-primary {
    box-shadow: 4px 4px 0 0 var(--black);
  }
}