:root {
  color-scheme: dark;
  font-family:
    "Segoe UI",
    "Noto Sans JP",
    sans-serif;
  background: #0d0f14;
  color: #f5f7fb;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 75% 20%, #1d3555 0, transparent 34%),
    #0d0f14;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0;
}

.site-header nav {
  display: flex;
  gap: 24px;
}

.site-header a {
  color: inherit;
  text-decoration: none;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
}

.hero {
  width: min(1180px, calc(100% - 40px));
  min-height: 76vh;
  margin: 0 auto;
  display: grid;
  align-content: center;
}

.eyebrow {
  color: #76b8ff;
  font-weight: 600;
}

h1 {
  max-width: 900px;
  margin: 12px 0 20px;
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.hero-text {
  max-width: 640px;
  color: #b9c1ce;
  font-size: 1.15rem;
  line-height: 1.9;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  padding: 14px 22px;
  border-radius: 10px;
  text-decoration: none;
}

.button.primary {
  background: #2688ff;
  color: white;
}

.button.secondary {
  border: 1px solid #39404c;
  color: white;
}