* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f1115;
  color: #f0f0f2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero-header {
  padding: 20px 24px;
  border-bottom: 1px solid #262a33;
}

.hero-header--split {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  color: inherit;
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 64px 24px 40px;
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 40px;
  margin: 0 0 16px;
}

.subtitle {
  font-size: 17px;
  color: #b7c0d0;
  line-height: 1.5;
  margin: 0 0 32px;
  max-width: 520px;
}

.start-btn {
  display: inline-block;
  background: #2f6fed;
  color: white;
  text-decoration: none;
  font-size: 18px;
  font-weight: 700;
  padding: 16px 48px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(47, 111, 237, 0.35);
  transition: transform 0.15s, box-shadow 0.15s;
}

.start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(47, 111, 237, 0.45);
}

.fine-print {
  font-size: 12px;
  color: #6b7280;
  margin: 16px 0 56px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  width: 100%;
}

.feature {
  background: #171a21;
  border: 1px solid #262a33;
  border-radius: 12px;
  padding: 24px 20px;
  text-align: left;
}

.feature-icon {
  font-size: 24px;
}

.feature h3 {
  font-size: 15px;
  margin: 12px 0 6px;
}

.feature p {
  font-size: 13px;
  color: #9aa4b8;
  line-height: 1.5;
  margin: 0;
}

.hero-footer {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: #6b7280;
  border-top: 1px solid #262a33;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.footer-links a {
  color: #6b7280;
  text-decoration: none;
}

.footer-links a:hover {
  color: #9aa4b8;
  text-decoration: underline;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 30px;
  }
  .features {
    grid-template-columns: 1fr;
  }
}