body { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; margin: 2rem; }
.container { max-width: 680px; margin: 0 auto; }
label { display:block; margin-top: 0.75rem; }
input, textarea, select { width:100%; padding:0.6rem; margin-top:0.25rem; }
button { margin-top:1rem; padding:0.7rem 1rem; border:0; cursor:pointer; }
.card { border:1px solid #ddd; border-radius:12px; padding:1.25rem; }
.success { background:#eefbea; border:1px solid #c5e7bf; padding:1rem; border-radius:8px; }
.error { background:#ffefef; border:1px solid #f2bcbc; padding:1rem; border-radius:8px; }