.sbst-form-wrap {
  max-width: 640px;
  margin: 0 auto;
  background: #FBF3E6;
  border: 1px solid #E9DCC8;
  border-radius: 8px;
  padding: 32px;
  font-family: -apple-system, "Work Sans", Arial, sans-serif;
  color: #2B2118;
  box-sizing: border-box;
}
.sbst-form-wrap * { box-sizing: border-box; }
.sbst-form-wrap h2 { margin: 0 0 6px; font-size: 26px; }
.sbst-form-wrap .sbst-sub { margin: 0 0 24px; color: #6b5c4d; font-size: 14px; }

.sbst-row { display: flex; gap: 16px; }
.sbst-row .sbst-field { flex: 1; }

.sbst-field { margin-bottom: 18px; }
.sbst-field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }

.sbst-field input[type=text],
.sbst-field input[type=email],
.sbst-field input[type=tel],
.sbst-field input[type=date],
.sbst-field select,
.sbst-field textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d8c9ac;
  border-radius: 4px;
  font-size: 14px;
  background: #fff;
}
.sbst-field textarea { min-height: 80px; resize: vertical; }

.sbst-radio-group label,
.sbst-checkbox-field label {
  font-weight: 400;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 18px;
}

.sbst-plan-group { display: flex; gap: 12px; flex-wrap: wrap; }
.sbst-plan-option {
  flex: 1;
  min-width: 200px;
  border: 2px solid #d8c9ac;
  border-radius: 6px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  background: #fff;
  font-weight: 400;
}
.sbst-plan-option:has(input:checked) {
  border-color: #C1651E;
  background: #FFF3E9;
}
.sbst-plan-title { font-weight: 600; font-size: 15px; }
.sbst-plan-amount { color: #7A2323; font-weight: 600; }

.sbst-checkbox-field { font-size: 13.5px; }

.sbst-submit-btn {
  width: 100%;
  background: #C1651E;
  color: #fff;
  border: none;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
}
.sbst-submit-btn:hover { background: #7A2323; }
.sbst-submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.sbst-message {
  padding: 12px 14px;
  border-radius: 4px;
  margin-bottom: 18px;
  font-size: 14px;
}
.sbst-success { background: #e4f5e4; color: #256b25; border: 1px solid #b8e0b8; }
.sbst-error { background: #fbe4e4; color: #8a1f1f; border: 1px solid #f1baba; }

@media (max-width: 600px) {
  .sbst-row { flex-direction: column; gap: 0; }
}