:root {
  color-scheme: dark;
  --bg: #050608;
  --panel: rgba(255, 255, 255, 0.075);
  --panel-strong: rgba(255, 255, 255, 0.11);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f4f7fb;
  --muted: #9aa6b4;
  --accent: #5eb5ff;
  --accent-strong: #67d3ac;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background:
    linear-gradient(180deg, rgba(30, 60, 95, 0.48), rgba(5, 6, 8, 0.72) 38%, #050608 100%),
    url("/assets/yttrio-icon.png") top 5rem right -7rem / min(56vw, 520px) auto no-repeat,
    #050608;
  color: var(--text);
}

a {
  color: inherit;
  text-decoration-color: rgba(94, 181, 255, 0.6);
  text-underline-offset: 0.18em;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  min-height: calc(100vh - 88px);
  display: grid;
  align-items: center;
  padding: 42px 0 96px;
}

.hero-content {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(48px, 8vw, 92px);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 24px 0 0;
  color: #d5dde8;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.45;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 18px;
  background: var(--panel);
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}

.button.primary {
  border-color: rgba(94, 181, 255, 0.4);
  background: rgba(94, 181, 255, 0.18);
}

.section {
  border-top: 1px solid var(--line);
  padding: 46px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.tile {
  min-height: 160px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
}

.tile h2,
.content h1 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
}

.tile p,
.content p,
.content li {
  color: var(--muted);
  line-height: 1.6;
}

.content {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 48px 0 80px;
}

.content h1 {
  color: var(--text);
  font-size: 38px;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  body {
    background:
      linear-gradient(180deg, rgba(30, 60, 95, 0.5), rgba(5, 6, 8, 0.78) 34%, #050608 100%),
      url("/assets/yttrio-icon.png") top 7rem right -9rem / 360px auto no-repeat,
      #050608;
  }

  .topbar,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero {
    align-items: start;
    min-height: auto;
    padding-top: 58px;
  }

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