body {
  font-family: 'Segoe UI', sans-serif;
  background: #121212;
  color: #e0e0e0;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 960px;
  margin: 30px auto;
  padding: 20px;
  background: #1e1e1e;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

textarea {
  width: 100%;
  height: 200px;
  padding: 10px;
  font-size: 14px;
  border: 1px solid #444;
  border-radius: 6px;
  resize: vertical;
  margin-bottom: 10px;
  background-color: #2a2a2a;
  color: #f5f5f5;
}

button {
  background: #3b82f6;
  color: white;
  border: none;
  padding: 10px 16px;
  font-size: 14px;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #2563eb;
}

.section {
  margin-top: 20px;
}

.tag {
  display: inline-block;
  background: #444;
  color: #e0e0e0;
  font-size: 13px;
  padding: 4px 8px;
  margin: 2px;
  border-radius: 4px;
}

.tag.easy {
  background: #10b981;
  color: white;
}
.tag.medium {
  background: #f59e0b;
  color: white;
}
.tag.hard {
  background: #ef4444;
  color: white;
}
.tag.gray {
  background: #4b5563;
  color: #e5e7eb;
}

h1, h2, h3 {
  color: #90cdf4;
}

ul {
  padding-left: 20px;
}

.example-block {
  background: #2a2a2a;
  border-left: 4px solid #60a5fa;
  padding: 10px;
  margin-top: 10px;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.6;
}

.tags {
  margin-top: 8px;
}

.description-text {
  white-space: pre-line;
  line-height: 1.8;
  font-size: 1rem;
  color: #d1d5db;
}