.mdl-inquiry-widget {
  position: fixed;
  bottom: 20px;
  z-index: 999999;
  font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
}
.mdl-inquiry-widget.mdl-pos-right { right: 20px; }
.mdl-inquiry-widget.mdl-pos-left { left: 20px; }

.mdl-inquiry-fab {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(20, 20, 20, 0.55);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  transition: background 0.2s ease, transform 0.2s ease;
}
.mdl-inquiry-fab:hover {
  background: rgba(40, 40, 40, 0.65);
  transform: translateY(-1px);
}

.mdl-inquiry-panel {
  position: absolute;
  bottom: 70px;
  width: 320px;
  max-width: calc(100vw - 40px);
  height: 440px;
  max-height: 70vh;
  background: rgba(24, 24, 26, 0.55);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.mdl-inquiry-panel[hidden] {
  display: none;
}
.mdl-pos-right .mdl-inquiry-panel { right: 0; }
.mdl-pos-left .mdl-inquiry-panel { left: 0; }

.mdl-inquiry-header {
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.mdl-inquiry-close {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
}
.mdl-inquiry-close:hover { color: #fff; }

.mdl-inquiry-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mdl-inquiry-msg {
  max-width: 85%;
  padding: 10px 13px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.mdl-inquiry-msg-ai {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.92);
}
.mdl-inquiry-msg-user {
  align-self: flex-end;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.22);
}

.mdl-inquiry-form {
  display: flex;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 10px;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
}
.mdl-inquiry-input {
  flex: 1;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}
.mdl-inquiry-input::placeholder { color: rgba(255, 255, 255, 0.45); }
.mdl-inquiry-input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.4);
}
.mdl-inquiry-send {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.mdl-inquiry-send:hover:not(:disabled) { background: rgba(255, 255, 255, 0.24); }
.mdl-inquiry-send:disabled { opacity: 0.5; cursor: default; }

@media (max-width: 420px) {
  .mdl-inquiry-panel { width: calc(100vw - 40px); }
}