body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  color: var(--text);
  background: var(--bg);
}

header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

header h1 {
  margin: 0;
  font-size: 2rem;
  color: var(--primary);
}

header p {
  margin: 0.5rem 0;
  color: var(--muted);
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.6rem 0.9rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}

button:hover { opacity: 0.95; }

.small-btn {
  background: transparent;
  border: 1px solid #e6eef0;
  color: var(--muted);
  padding: 0.4rem 0.6rem;
  border-radius: 8px;
}

.note {
  background: #eef5ff;
  border-left: 4px solid var(--accent);
  padding: 0.8rem;
  border-radius: 8px;
  color: #223;
  margin-top: 0.6rem;
}

.legend {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 0.6rem;
}

.legend .item {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  font-size: 0.9rem;
  color: var(--muted);
}

.legend .sw {
  width: 18px;
  height: 12px;
  border-radius: 4px;
  display: inline-block;
  border: 1px solid rgba(0,0,0,0.05);
}

@media (max-width: 900px) {
  header h1 { font-size: 1.6rem; }
}