body { font-family: Arial, sans-serif; background: #f0f2f5; margin:0; padding:20px; }
.container { max-width: 900px; margin: auto; }
h1 { text-align: center; color: #2c3e50; }
.algo { background: white; padding: 20px; margin: 20px 0; border-radius: 10px; box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
input, textarea { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ccc; border-radius: 5px; }
button { padding: 10px 20px; margin: 5px; background: #3498db; color: white; border: none; border-radius: 5px; cursor: pointer; }
button:hover { background: #2980b9; }
.buttons { text-align: center; }
textarea[readonly] { background: #ecf0f1; }