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

html {
  font-size: 20px;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.5;
  color: #1a1a1a;
  background: #f4f1ea;
}

.site-header {
  background: #2c4a3e;
  color: #f8f5ee;
  text-align: center;
  padding: 2rem 1.25rem 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 0.4rem 0 0;
  font-size: 1.1rem;
  opacity: 0.9;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3rem;
}

.intro {
  margin: 0 0 1.5rem;
  font-size: 1.15rem;
}

.card {
  background: #fff;
  border: 1px solid #d8d2c6;
  border-radius: 8px;
  padding: 1.25rem 1.35rem 1.4rem;
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  color: #2c4a3e;
}

.card p {
  margin: 0 0 0.75rem;
}

.button {
  display: inline-block;
  margin-top: 0.25rem;
  padding: 0.55rem 1.1rem;
  background: #2c4a3e;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 700;
}

.button:hover,
.button:focus {
  background: #1e342c;
}

.file-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.file-list li {
  margin: 0 0 0.65rem;
  padding: 0.7rem 0.85rem;
  background: #f8f5ee;
  border: 1px solid #d8d2c6;
  border-radius: 6px;
}

.file-list a {
  color: #1d4f3a;
  font-weight: 700;
  word-break: break-word;
}

.empty-note {
  color: #555;
  font-style: italic;
}

footer {
  text-align: center;
  padding: 1rem;
  color: #666;
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  html {
    font-size: 18px;
  }

  .site-header h1 {
    font-size: 1.7rem;
  }
}