* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* NEW THEME */
  background: #e6f2fb;          /* light blue */
  color: #4a2f1b;               /* brown text */
}

/* ---------- Header ---------- */

header {
  padding: 1.5rem 1rem;
  text-align: center;
  background: #d4e9f7;
  border-bottom: 2px solid #b08968;
}

header h1 {
  margin: 0;
  font-size: 2rem;
  color: #4a2f1b;
}

header p {
  margin: 0.5rem 0 0;
  color: #6b4b2f;
}

/* ---------- Layout ---------- */

main {
  max-width: 900px;
  margin: 1.5rem auto 2rem;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

@media (min-width: 700px) {
  main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- Cards ---------- */

.card {
  background: #f8fbff;
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  border: 2px solid #b08968;
  box-shadow: 0 6px 18px rgba(74, 47, 27, 0.15);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  color: #4a2f1b;
}

.note {
  font-size: 0.9rem;
  color: #6b4b2f;
}

/* ---------- Info Section ---------- */

.info {
  max-width: 900px;
  margin: 2rem auto 1rem;
  padding: 1.5rem 1.75rem;
  background: #f1f7fc;
  border-left: 6px solid #b08968;
  border-radius: 10px;
}

.info h2 {
  margin-top: 0;
  color: #4a2f1b;
}

.info p {
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.info .note {
  font-style: italic;
}

/* ---------- Code / UA ---------- */

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #efe6dc;
  padding: 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  color: #4a2f1b;
}

/* ---------- Footer ---------- */

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: #6b4b2f;
  border-top: 2px solid #b08968;
  background: #e0eef8;
}