body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  color: #333;
}
header {
  text-align: center;
  padding: 40px 20px;
  background: linear-gradient(135deg, #0072ff, #00c6ff);
  color: white;
  border-bottom-left-radius: 50px;
  border-bottom-right-radius: 50px;
}
.subtitle { font-size: 1.1rem; opacity: 0.9; }
.container { padding: 40px; max-width: 1100px; margin: auto; }
.controls { display:flex; gap:10px; justify-content:center; margin-bottom:30px; flex-wrap:wrap; }
.controls input { width:320px; padding:12px; border-radius:30px; border:1px solid #aaa; text-align:left; }
.controls select { padding:12px; border-radius:10px; border:1px solid #aaa; }
.donor-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}
.donor-card {
  background: white; padding: 20px; border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1); transition: 0.3s;
}
.donor-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,114,255,0.3); }
.login-box {
  background: white; padding: 40px; border-radius: 20px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.1);
  max-width: 420px; margin: 10% auto; text-align: center;
}
.login-box input { width: 100%; padding: 12px; margin-top: 15px; border: 1px solid #ccc; border-radius: 8px; }
.login-box button {
  margin-top: 20px; padding: 12px 30px; border: none;
  background: linear-gradient(135deg, #0072ff, #00c6ff);
  color: white; border-radius: 30px; cursor: pointer;
}
.error { color: red; margin-top: 10px; }
.success { color: green; font-weight: bold; }
.admin-container {
  max-width: 720px; margin: 5% auto; background: white; padding: 30px;
  border-radius: 20px; box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}
.admin-form input, .upload-form input {
  width: 100%; padding: 10px; margin: 10px 0; border-radius: 8px; border: 1px solid #ccc;
}
.admin-form button, .upload-form button {
  width: 100%; padding: 12px; background: linear-gradient(135deg, #0072ff, #00c6ff);
  color: white; border: none; border-radius: 30px; cursor: pointer; font-size: 1rem;
}