/* Plot — clean and minimal */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: #1a1a1a;
  background: #ffffff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  text-align: center;
  padding: 4rem 1.5rem 2.5rem;
}

.site-header h1 {
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.tagline {
  margin-top: 0.5rem;
  color: #777;
  font-size: 1.05rem;
}

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem 2rem 4rem;
}

.column h2 {
  font-size: 1.25rem;
  font-weight: 600;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #1a1a1a;
}

.column-sub {
  color: #888;
  font-size: 0.9rem;
  margin: 0.6rem 0 1.5rem;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  background: #fff;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.card p {
  font-size: 0.95rem;
  color: #555;
}

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  color: #aaa;
  font-size: 0.85rem;
  border-top: 1px solid #f0f0f0;
}

@media (max-width: 700px) {
  .columns {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 1rem 1.25rem 3rem;
  }

  .site-header {
    padding: 3rem 1.25rem 2rem;
  }
}