body { font-family: system-ui, sans-serif; background: #f4f4f4; margin: 0; padding: 2rem; }
.container { max-width: 800px; margin: auto; background: white; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
input[type="url"] { width: 70%; padding: 1rem; font-size: 1.2rem; }
button { padding: 1rem 2rem; font-size: 1.2rem; background: #0066ff; color: white; border: none; cursor: pointer; }
.results { margin-top: 2rem; }
.error { color: red; font-weight: bold; }
ul { list-style: none; padding: 0; }
li { margin: 1rem 0; padding: 1rem; background: #f9f9f9; border-radius: 6px; }