:root {
  --background: #f7f8fa;
  --surface: #ffffff;
  --ink: #111820;
  --muted: #64707c;
  --line: #dfe4e8;
  --accent: #168f8a;
  --accent-dark: #0e6f6b;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.site-header,
main,
footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand {
  font-size: 1.15rem;
}

.header-link {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.header-link:hover {
  color: var(--ink);
}

.hero {
  min-height: 680px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  max-width: 900px;
  padding: 100px 0;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 32px;
  max-width: 850px;
  font-size: clamp(3.4rem, 9vw, 7rem);
  line-height: 0.96;
  letter-spacing: -0.075em;
}

.hero-copy {
  max-width: 650px;
  margin-bottom: 36px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 0.92rem;
  font-weight: 600;
  transition: 160ms ease;
}

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

.button-primary:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.button-secondary {
  background: transparent;
}

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

.solutions {
  padding: 120px 0;
  border-top: 1px solid var(--line);
}

.section-intro {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  margin-bottom: 72px;
}

.section-intro h2,
.contact h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.solution-list {
  border-top: 1px solid var(--line);
}

.solution-list article {
  display: grid;
  grid-template-columns: 80px 1fr 1.2fr;
  gap: 24px;
  align-items: start;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.solution-list span {
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.solution-list h3 {
  margin-bottom: 0;
  font-size: 1.15rem;
}

.solution-list p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.principle {
  padding: 130px 0;
  border-top: 1px solid var(--line);
}

.principle p {
  max-width: 920px;
  margin-bottom: 0;
  font-size: clamp(2rem, 5.5vw, 4.6rem);
  line-height: 1.1;
  letter-spacing: -0.055em;
}

.principle strong {
  color: var(--accent-dark);
  font-weight: 600;
}

.contact {
  margin-bottom: 48px;
  padding: 90px;
  border-radius: 16px;
  background: var(--surface);
}

.contact h2 {
  max-width: 800px;
  margin-bottom: 24px;
}

.contact > p:not(.eyebrow) {
  max-width: 590px;
  margin-bottom: 32px;
  color: var(--muted);
  line-height: 1.7;
}

footer {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.84rem;
}

footer p {
  margin-bottom: 0;
}

@media (max-width: 720px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .hero {
    min-height: 590px;
    padding: 80px 0;
  }

  h1 {
    font-size: clamp(3.1rem, 16vw, 5.2rem);
  }

  .solutions,
  .principle {
    padding: 88px 0;
  }

  .section-intro,
  .solution-list article {
    grid-template-columns: 1fr;
  }

  .section-intro {
    gap: 16px;
    margin-bottom: 48px;
  }

  .solution-list article {
    gap: 12px;
  }

  .contact {
    padding: 56px 24px;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 12px;
  }
}