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

body {
  font-family: Arial, sans-serif;
}

header {
  background: #2c3e50;
  color: white;
  padding: 1rem;
  text-align: center;
}

main {
  display: flex;
  height: calc(100vh - 80px);
}

#filters {
  width: 250px;
  background: #ecf0f1;
  padding: 1rem;
  overflow-y: auto;
}

#filters h2 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

#filters h3 {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: #7f8c8d;
}

.filter-btn {
  display: block;
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border: 1px solid #bdc3c7;
  border-radius: 4px;
  background: white;
  cursor: pointer;
  text-align: left;
}

.filter-btn:hover {
  background: #3498db;
  color: white;
  border-color: #3498db;
}

.filter-btn.active {
  background: #2c3e50;
  color: white;
  border-color: #2c3e50;
}

#filters select {
  display: block;
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border: 1px solid #bdc3c7;
  border-radius: 4px;
}

#filters label {
  display: block;
  margin-top: 0.5rem;
  font-weight: bold;
  font-size: 0.9rem;
  color: #7f8c8d;
}

#reset-btn {
  display: block;
  width: 100%;
  padding: 0.5rem;
  margin-top: 1rem;
  border: none;
  border-radius: 4px;
  background: #e74c3c;
  color: white;
  cursor: pointer;
}

#reset-btn:hover {
  background: #c0392b;
}

#map {
  flex: 1;
}