.fbk-bubble-btn {
  position: fixed; bottom: 156px; right: 25px; z-index: 9999;
  width: 56px; height: 56px; border-radius: 50%; border: none;
  background: #0c0c0c; color: #fff; font-size: 20px; cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
}
.fbk-bubble-btn:hover { transform: scale(1.08); box-shadow: 0 6px 24px rgba(0,0,0,0.5); }
.fbk-bubble-btn .close-icon { display: none; }
.fbk-bubble-btn.open .bubble-icon { display: none; }
.fbk-bubble-btn.open .close-icon { display: block; }

.fbk-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4); z-index: 9998;
  display: none; animation: fadeIn 0.2s;
}

.fbk-panel {
  position: fixed; bottom: 155px; right: 25px; z-index: 10000;
  width: 380px; max-height: 550px; background: #fff; border-radius: 12px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  display: none; flex-direction: column; overflow: hidden;
  animation: slideUp 0.25s ease-out;
}
.fbk-panel.open { display: flex; }
.fbk-overlay.open { display: block; }

.fbk-panel-header {
  background: #005A40; color: #fff; padding: 16px 20px; flex-shrink: 0;
}
.fbk-panel-header h3 { margin: 0; font-size: 16px; font-weight: 700; }
.fbk-panel-header p { margin: 4px 0 0; font-size: 12px; opacity: 0.8; }

.fbk-panel-body { flex: 1; overflow-y: auto; padding: 16px 20px; }

.fbk-form-group { margin-bottom: 12px; }
.fbk-form-group label { display: block; font-size: 12px; font-weight: 600; color: #333; margin-bottom: 4px; }
.fbk-form-group input, .fbk-form-group select, .fbk-form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid #ddd; border-radius: 6px;
  font-size: 13px; font-family: inherit; box-sizing: border-box; outline: none;
  background: #fff; color: #333;
}
.fbk-form-group input:focus, .fbk-form-group select:focus, .fbk-form-group textarea:focus { border-color: #005A40; }
.fbk-form-group textarea { resize: vertical; min-height: 90px; }

.fbk-submit {
  width: 100%; padding: 12px; background: linear-gradient(90deg, #005A40, #0c0c0c);
  color: #fff; border: none; border-radius: 6px; font-size: 14px; font-weight: 700;
  cursor: pointer;
}
.fbk-submit:hover { opacity: 0.95; }

.fbk-message { padding: 10px 12px; border-radius: 6px; font-size: 13px; display: none; margin-bottom: 12px; }
.fbk-message.show { display: block; }
.fbk-message.success { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.fbk-message.error { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 480px) {
  .fbk-panel { width: calc(100% - 30px); right: 15px; bottom: 145px; max-height: 60vh; }
  .fbk-bubble-btn { bottom: 146px; right: 15px; }
}