.btb-wrapper {
  --btb-red: #d81f2a;
  --btb-dark: #0a0a0a;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  color: #111;
  box-sizing: border-box;
}
.btb-wrapper *, .btb-wrapper *::before, .btb-wrapper *::after { box-sizing: border-box; }

.btb-hero { text-align: center; margin-bottom: 36px; }
.btb-hero h2 { font-size: 1.6rem; margin: 0 0 12px; font-weight: 700; }
.btb-hero p { color: #444; font-size: 14px; max-width: 900px; margin: 0 auto; line-height: 1.7; }

.btb-alert { max-width: 900px; margin: 0 auto 24px; padding: 14px 18px; border-radius: 8px; font-size: 14px; text-align: center; }
.btb-alert-success { background: #e9f9ee; border: 1px solid #34a853; color: #1e6b34; }
.btb-alert-error { background: #fdeceb; border: 1px solid var(--btb-red); color: #8f1017; }

.btb-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 28px; align-items: start; }

.btb-panel { background: #fff; border: 1px solid #e2e2e2; border-radius: 12px; padding: 26px 24px; }
.btb-col-right .btb-panel { border: 2px solid var(--btb-dark); border-radius: 22px; }

.btb-panel h3 { font-size: 1.05rem; margin: 22px 0 10px; }
.btb-panel h3:first-child { margin-top: 0; }
.btb-panel p { font-size: 13.5px; color: #444; line-height: 1.7; margin: 0 0 6px; }

.btb-form-title { text-align: center; font-size: 1.35rem; margin: 0 0 4px; }
.btb-note { text-align: center; color: var(--btb-red); font-size: 13px; font-weight: 600; margin: 0 0 24px; }

.btb-faq { margin-top: 6px; }
.btb-faq-item { border-bottom: 1px solid #eee; }
.btb-faq-q {
  width: 100%; background: none; border: none; text-align: left; padding: 14px 4px;
  font-size: 13.5px; font-weight: 600; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center; gap: 10px; color: #111;
}
.btb-faq-icon { color: var(--btb-red); font-size: 18px; transition: transform .2s ease; flex-shrink: 0; }
.btb-faq-item.open .btb-faq-icon { transform: rotate(45deg); }
.btb-faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.btb-faq-a p { padding: 0 4px 14px; font-size: 13px; color: #555; }
.btb-faq-item.open .btb-faq-a { max-height: 400px; }

.btb-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.btb-field { display: flex; flex-direction: column; }
.btb-field label { font-size: 12.5px; font-weight: 600; margin-bottom: 6px; }
.btb-field input[type="text"],
.btb-field input[type="email"],
.btb-field select,
.btb-field textarea {
  border: 1px solid #ccc; border-radius: 6px; padding: 10px 12px; font-size: 13.5px;
  width: 100%; font-family: inherit; background: #fff; color: #111;
}
.btb-field input:focus, .btb-field select:focus, .btb-field textarea:focus {
  outline: none; border-color: var(--btb-red); box-shadow: 0 0 0 3px rgba(216, 31, 42, 0.12);
}
.btb-field textarea { min-height: 96px; resize: vertical; }

.btb-file-wrap {
  position: relative; border: 1px solid var(--btb-red); border-radius: 6px;
  padding: 8px 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.btb-file-wrap input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
.btb-file-btn { background: #f2f2f2; border: 1px solid #ccc; border-radius: 4px; padding: 4px 10px; font-size: 12px; }
.btb-file-name { font-size: 12.5px; color: #666; word-break: break-all; }

.btb-radio-group { display: flex; flex-wrap: wrap; gap: 10px 18px; padding-top: 4px; }
.btb-radio { font-size: 13px; display: flex; align-items: center; gap: 6px; color: #333; cursor: pointer; }
.btb-radio input { accent-color: var(--btb-red); }

.btb-submit {
  width: 100%; background: var(--btb-dark); color: #fff; border: none; padding: 14px;
  font-size: 14px; font-weight: 600; border-radius: 8px; cursor: pointer;
  transition: background .2s ease; margin-top: 8px;
}
.btb-submit:hover { background: var(--btb-red); }

.btb-whatsapp-float {
  position: fixed; left: 20px; bottom: 20px; width: 56px; height: 56px;
  background: #25D366; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25); z-index: 9999;
  animation: btbPulse 2.4s ease infinite;
}
@keyframes btbPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }

/* Responsive */
@media (max-width: 900px) {
  .btb-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .btb-wrapper { padding: 28px 14px; }
  .btb-panel { padding: 20px 16px; }
  .btb-row { grid-template-columns: 1fr; gap: 14px; margin-bottom: 14px; }
  .btb-hero h2 { font-size: 1.3rem; }
  .btb-form-title { font-size: 1.15rem; }
  .btb-whatsapp-float { width: 50px; height: 50px; left: 14px; bottom: 14px; }
}
@media (max-width: 380px) {
  .btb-wrapper { padding: 20px 10px; }
  .btb-panel { padding: 16px 12px; }
}