:root {
  --primary: #ffffff;
  --accent: #3498db;
  --highlight: #2ecc71;
  --visited: #f1c40f;
  --current: #e67e22;
  --min: #e74c3c;
  --done: #9b59b6;
  --text: #2c3e50;
  --shadow: rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}

body {
  background-color: var(--primary);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  align-items: center;
  justify-content: space-between;
}

.title {
  padding: 1rem;
  font-size: 2rem;
  background-color: var(--accent);
  color: white;
  width: 100%;
  text-align: center;
  box-shadow: 0 2px 4px var(--shadow);
}

.navbar {
  background: #ecf0f1;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  flex-wrap: wrap;
}

.navbar select,
.navbar button {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-weight: bold;
  cursor: pointer;
  background: white;
  transition: all 0.3s ease;
}

.navbar button:hover,
.navbar select:hover {
  background: var(--accent);
  color: white;
}

.center {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.array {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 400px;
  width: 90%;
  max-width: 1200px;
  margin: auto;
  gap: 2px;
}

.cell {
  width: 100%;
  max-width: 10px;
  background: #bdc3c7;
  transition: all 0.3s ease;
}

.cell.current {
  background-color: var(--current);
}

.cell.min {
  background-color: var(--min);
}

.cell.visited {
  background-color: var(--visited);
}

.cell.done {
  background-color: var(--done);
}

footer {
  padding: 1rem;
  text-align: center;
  font-size: 1rem;
  color: var(--text);
}