* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: #0f172a;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 28px 24px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
h1 { font-size: 22px; margin: 0 0 6px; color: #0f172a; }
p { color: #475569; font-size: 14px; margin: 0 0 18px; }
.package-option {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 14px;
}
.package-option:hover { border-color: #16a34a; }
.form-group { margin-top: 16px; }
label { display: block; font-size: 13px; color: #334155; margin-bottom: 6px; }
input[type="tel"] {
  width: 100%;
  padding: 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 15px;
}
button {
  width: 100%;
  margin-top: 18px;
  padding: 13px;
  background: #16a34a;
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { background: #94a3b8; cursor: not-allowed; }
.hidden { display: none; }
#statusBox { margin-top: 18px; text-align: center; }
.spinner {
  width: 28px; height: 28px;
  border: 3px solid #e2e8f0;
  border-top-color: #16a34a;
  border-radius: 50%;
  margin: 0 auto 10px;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }