* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f7f4ef;
  color: #222;
  line-height: 1.6;
}

header {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 22px;
  font-weight: 700;
}

nav a {
  color: #333;
  text-decoration: none;
  margin-left: 20px;
}

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

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.hero,
.page,
.card {
  background: #fff;
  border-radius: 22px;
  box-shadow: 0 10px 35px rgba(0,0,0,.05);
}

.hero {
  padding: 52px;
}

.page {
  padding: 42px;
}

h1 {
  font-size: 42px;
  line-height: 1.15;
  margin: 0 0 18px;
}

p {
  color: #555;
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.card {
  padding: 24px;
}

.card h2 {
  margin-top: 0;
  font-size: 21px;
}

.card a,
.note-list a,
.back-link {
  color: #7a4d2b;
  font-weight: 700;
  text-decoration: none;
}

.card a:hover,
.note-list a:hover,
.back-link:hover {
  text-decoration: underline;
}

.note-list li {
  margin: 14px 0;
}

footer {
  max-width: 980px;
  margin: 40px auto;
  padding: 0 24px 40px;
  color: #777;
}

@media (max-width: 800px) {
  header {
    display: block;
  }

  nav {
    margin-top: 12px;
  }

  nav a {
    margin: 0 16px 8px 0;
    display: inline-block;
  }

  .hero,
  .page {
    padding: 32px;
  }

  h1 {
    font-size: 32px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}