:root {
  color-scheme: dark;
  --bg: #080d14;
  --panel: #101926;
  --panel-2: #152232;
  --text: #eef8ff;
  --muted: rgba(238, 248, 255, 0.72);
  --line: rgba(180, 235, 255, 0.18);
  --cyan: #66e7ff;
  --cyan-soft: rgba(102, 231, 255, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 28%, rgba(60, 210, 255, 0.13), transparent 34rem),
    linear-gradient(180deg, #080d14 0%, #111824 100%);
  font-family: ui-rounded, "Hiragino Maru Gothic ProN", "Hiragino Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.75;
}

main {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

nav {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
  padding: 12px 0 36px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.03);
}

nav a:first-child {
  margin-right: auto;
  color: var(--text);
  font-weight: 800;
}

h1, h2 {
  line-height: 1.12;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(3.5rem, 12vw, 8rem);
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(1.45rem, 4vw, 2rem);
}

p, li {
  color: var(--muted);
}

section {
  margin: 22px 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(21, 34, 50, 0.8), rgba(16, 25, 38, 0.82));
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.hero {
  min-height: 520px;
  display: grid;
  align-content: center;
  overflow: hidden;
  position: relative;
}

.eyebrow {
  color: var(--cyan);
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lead {
  max-width: 640px;
  font-size: 1.15rem;
}

.face {
  display: flex;
  gap: 36px;
  margin-top: 56px;
  justify-content: center;
}

.face span {
  width: clamp(92px, 18vw, 132px);
  height: clamp(112px, 21vw, 156px);
  border-radius: 44%;
  background:
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0 5px, transparent 5px 15px),
    linear-gradient(180deg, #d4fbff 0%, #3ad8ea 70%, #28b8ce 100%);
  box-shadow: 0 0 36px var(--cyan), 0 0 100px var(--cyan-soft);
  opacity: 0.96;
}

.button {
  display: inline-block;
  color: #041018;
  background: var(--cyan);
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 800;
  text-decoration: none;
}

.todo {
  color: #ffd18a;
  font-weight: 800;
}

@media (max-width: 640px) {
  main {
    width: min(100% - 20px, 920px);
  }

  nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  nav a:first-child {
    width: 100%;
  }

  section {
    padding: 22px;
    border-radius: 24px;
  }

  .hero {
    min-height: 500px;
  }
}