/* External CSS extracted from index.html */
/* Add your styles here */
body { font-family: Arial, sans-serif; background: #f7f7f7; margin: 0; padding: 2em; }
h1 { color: #333; }
#gantt { background: #fff; border-radius: 6px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); margin-top: 2em; }
.error { color: red; }