.marusuke-ai-chat-lock {
  overflow: hidden;
}

.marusuke-ai-chat-root {
  position: relative;
}

.marusuke-ai-chat-root.is-floating .marusuke-ai-chat-open {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 9998;
}

.marusuke-ai-chat-open {
  display: inline-block;
  padding: 12px 18px;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1.4;
  background: #222;
  color: #fff;
}

.marusuke-ai-chat-modal[hidden] {
  display: none;
}

.marusuke-ai-chat-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
}

.marusuke-ai-chat-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.marusuke-ai-chat-dialog {
  position: relative;
  width: min(680px, calc(100% - 32px));
  max-height: 90vh;
  margin: 5vh auto 0;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
}

.marusuke-ai-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
  flex-shrink: 0;
}

.marusuke-ai-chat-title {
  margin: 0;
  font-size: 18px;
}

.marusuke-ai-chat-close {
  border: none;
  background: transparent;
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}

.marusuke-ai-chat-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1 1 auto;
  min-height: 0;
}

.marusuke-ai-chat-description {
  margin: 0 0 16px;
  color: #555;
  font-size: 14px;
}

.marusuke-ai-chat-form {
  display: grid;
  gap: 12px;
}

.marusuke-ai-chat-input {
  width: 100%;
  min-height: 90px;
  padding: 12px;
  border: 1px solid #d8d8d8;
  border-radius: 10px;
  resize: vertical;
  font-size: 14px;
  box-sizing: border-box;
}

.marusuke-ai-chat-send {
  justify-self: end;
  border: none;
  border-radius: 10px;
  background: #222;
  color: #fff;
  padding: 10px 16px;
  cursor: pointer;
}

.marusuke-ai-chat-send:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.marusuke-ai-chat-status {
  margin-top: 14px;
  min-height: 1.5em;
  color: #b00020;
  font-size: 14px;
}

.marusuke-ai-chat-result {
  margin-top: 16px;
}

.marusuke-ai-chat-reply {
  margin-bottom: 12px;
}

.marusuke-ai-chat-reply p {
  margin: 0;
  font-size: 15px;
  color: #222;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

.marusuke-ai-chat-typing::after {
  content: "▋";
  display: inline-block;
  margin-left: 2px;
  animation: marusuke-ai-chat-blink 0.8s infinite;
}

@keyframes marusuke-ai-chat-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.marusuke-ai-chat-articles {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.marusuke-ai-chat-article {
  margin: 0;
}

.marusuke-ai-chat-article-link {
  display: block;
  padding: 14px;
  border: 1px solid #ececec;
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.marusuke-ai-chat-article-link:hover {
  background: #fafafa;
  border-color: #ccc;
}

.marusuke-ai-chat-article-title {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

.marusuke-ai-chat-article-excerpt {
  display: block;
  font-size: 13px;
  color: #666;
  line-height: 1.6;
}

.marusuke-ai-chat-empty p {
  margin: 0;
  color: #444;
}

@media (max-width: 640px) {
  .marusuke-ai-chat-dialog {
    width: calc(100% - 16px);
    max-height: 94vh;
    margin-top: 2vh;
    border-radius: 12px;
  }

  .marusuke-ai-chat-body {
    padding: 16px;
  }

  .marusuke-ai-chat-root.is-floating .marusuke-ai-chat-open {
    right: 12px;
    bottom: 12px;
  }
}