:root {
  color-scheme: light;
  --bg: #f8f7f3;
  --surface: #ffffff;
  --text: #1f2933;
  --muted: #52616b;
  --line: #d9e2ec;
  --brand: #176b87;
  --brand-strong: #114f63;
  --accent: #c8553d;
  --shadow: 0 18px 45px rgba(31, 41, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

code {
  padding: 0.08em 0.32em;
  border-radius: 4px;
  background: rgba(23, 107, 135, 0.1);
  color: var(--brand-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  width: 100%;
  border-bottom: 1px solid var(--line);
  background: rgba(248, 247, 243, 0.88);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(1120px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 32%, #ffffff 0 18%, transparent 19%),
    linear-gradient(135deg, var(--brand), #2fb7a8 52%, var(--accent));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  text-decoration: none;
}

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

.main {
  flex: 1;
}

.hero {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 76px 0 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: 48px;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 620px;
  font-size: clamp(2.7rem, 8vw, 5.75rem);
  line-height: 0.92;
  letter-spacing: 0;
}

.intro {
  max-width: 560px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.03rem, 2vw, 1.2rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--brand);
  color: #ffffff;
  font-weight: 720;
  text-decoration: none;
}

.button:hover {
  background: var(--brand-strong);
}

.button.secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.button.secondary:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: transparent;
}

.hero-visual {
  min-height: 420px;
  border-radius: 8px;
  overflow: hidden;
  background:
    linear-gradient(155deg, rgba(23, 107, 135, 0.12), rgba(200, 85, 61, 0.1)),
    url("../img/lumensphere-hero.svg") center / cover no-repeat;
  box-shadow: var(--shadow);
}

.section {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.section-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 56px;
}

.section h2 {
  margin: 0 0 20px;
  font-size: clamp(1.65rem, 4vw, 2.45rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.page-card {
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.page-card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.page-card p {
  margin: 0;
  color: var(--muted);
}

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

.footer-inner {
  width: min(1120px, calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 820px) {
  .nav {
    min-height: auto;
    padding: 18px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 52px;
    gap: 32px;
  }

  .hero-visual {
    min-height: 280px;
  }

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

  .footer-inner {
    padding: 20px 0;
    align-items: flex-start;
    flex-direction: column;
  }
}