.captive-shell {
  min-height: 100vh;
  background: linear-gradient(180deg, #f7f4fc 0%, #f6f8f9 44%, #eef3f5 100%);
}
.captive-header {
  display: flex;
  justify-content: center;
  padding: 18px 16px 8px;
}
.captive-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: min(100%, 420px);
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  text-align: center;
}
.captive-brand img {
  width: auto;
  max-width: 150px;
  max-height: 44px;
  object-fit: contain;
}
.captive-main {
  width: min(100% - 32px, 760px);
  margin: 0 auto;
  padding: 12px 0 24px;
}
.captive-main .center-message,
.captive-main .form-page {
  padding: 28px 0;
}
.captive-main .center-message h1,
.captive-main .form-page h1 {
  font-size: clamp(1.8rem, 8vw, 3.1rem);
}
.captive-main input,
.captive-main select,
.captive-main textarea {
  font-size: 16px;
}
.captive-footer {
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 8px 16px 24px;
  color: var(--muted);
  font-size: .82rem;
  text-align: center;
}
.captive-footer a { color: var(--primary); font-weight: 700; }
.login-card .check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}
.login-card .check input {
  flex: 0 0 auto;
  width: 22px;
  min-height: 22px;
  margin-top: 1px;
}
.square-checkout {
  display: grid;
  gap: 14px;
  margin: 18px 0;
  padding: 16px;
  border: 1px solid rgba(67, 32, 135, .18);
  border-radius: 8px;
  background: #fff;
}
.square-card-container {
  min-height: 92px;
}
@media (max-width: 420px) {
  .captive-main { width: min(100% - 20px, 760px); }
  .captive-brand { flex-direction: column; }
}