* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #0d1117;
  color: #fff;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
}

.logo {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 2px;
  color: #fff;
}

.menu {
  width: 32px;
  height: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
}
.menu span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px 80px;
}

h1 {
  font-size: clamp(32px, 6vw, 84px);
  line-height: 1.1;
  font-weight: 800;
  max-width: 1100px;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

h1 .accent {
  color: #8aff9d;
}

.cta {
  display: inline-block;
  background: #8aff9d;
  color: #0d1117;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 700;
  padding: 18px 48px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  box-shadow: 0 8px 30px rgba(138, 255, 157, 0.25);
}

.cta:hover {
  transform: translateY(-2px);
  background: #9dffae;
  box-shadow: 0 12px 36px rgba(138, 255, 157, 0.35);
}

.cta:active {
  transform: translateY(0);
}

@media (max-width: 600px) {
  header { padding: 18px 20px; }
  main { padding: 20px 18px 60px; }
  h1 { margin-bottom: 36px; }
  .cta { width: 100%; max-width: 360px; padding: 16px 24px; }
}