body {
  margin:0; font-family:system-ui, sans-serif; background:#fff; color:#333;
}
.center {
  text-align:center; max-width:600px; margin:5rem auto; padding:1rem;
}
.hidden { display:none; }
.logo { max-width:200px; margin:0 auto 1rem; }
h1 { font-size:2.5rem; margin-bottom:.5rem; color:#5A6A4B; }
.tagline { font-size:1.2rem; color:#7B8C5F; margin-bottom:2rem; }
form { display:flex; flex-direction:column; gap:1rem; margin-top:1rem; }
input, textarea {
  padding:.6rem; font-size:1rem; border:1px solid #ccc; border-radius:6px; width:100%;
}
textarea { min-height:120px; }
.btn {
  display:inline-block; background:#7B8C5F; color:#fff; padding:.75rem 1.25rem;
  border-radius:6px; font-weight:600; text-decoration:none; border:none; cursor:pointer;
}
.btn:hover { background:#5A6A4B; }