:root {
  --primary: #000;
  --accent: #0071e3;
  --bg: #f9f9f9;
  --text: #1d1d1f;
  --max-width: 900px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  background-color: #fff;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
}

header h1 {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.4px;
}

nav a {
  text-decoration: none;
  color: var(--text);
  margin-left: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
}

nav a:hover {
  color: var(--accent);
}

.logo {
  height: 7rem;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo img {
  height: 100%;
}

main {
  max-width: var(--max-width);
  margin: 100px auto 0;
  padding: 0 2rem;
}

section {
  padding: 3rem 0;
  border-bottom: 1px solid #e5e5e5;
}

section:last-of-type {
  border-bottom: none;
}

section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

section p {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.link:hover {
  text-decoration: underline;
}

footer {
  background: #fff;
  padding: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: #666;
  border-top: 1px solid #eaeaea;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  nav a {
    margin-left: 1rem;
    font-size: 0.9rem;
  }

  main {
    padding: 0 1rem;
  }

  section h2 {
    font-size: 1.5rem;
  }

  section p {
    font-size: 1rem;
  }
}