body {
  font-family: "Vazirmatn", sans-serif;
  background: #f5f6fa;
  color: #222;
  direction: rtl;
  text-align: right;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: 50px auto;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  padding: 30px;
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 40px;
}

.pillar {
  margin: 15px 0;
  padding: 10px 15px;
  border-right: 3px solid #3498db;
  background: #ecf6ff;
  border-radius: 10px;
  transition: all 0.3s ease;
  position: relative;
}

.pillar:hover {
  background: #dceeff;
  cursor: pointer;
}

.description-box {
  display: none;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 10px;
  padding: 10px 15px;
  margin-top: 10px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: #555;
}

.level-1 { border-right-color: #2980b9; margin-right: 0; }
.level-2 { border-right-color: #16a085; margin-right: 20px; }
.level-3 { border-right-color: #8e44ad; margin-right: 40px; }
.level-4 { border-right-color: #c0392b; margin-right: 60px; }

.hidden { display: none; }