:root {
  --ai-chat-width: 432px;
  --ai-chat-height: 560px;
  --ai-chat-gap: 12px;
  --ai-chat-font-size: 14px;
  --ai-chat-title-size: 16px;
  --ai-chat-small-size: 12px;
  --ai-chat-content-space: 8px;
}
.ai-chat-window {
  position: fixed; right: 16px; bottom: 16px; z-index: 70;
  width: min(var(--ai-chat-width), calc(100vw - 32px));
  height: min(var(--ai-chat-height), calc(100dvh - 96px));
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--map-control-bg); color: var(--map-control-text);
  border: 1px solid var(--map-control-border); border-radius: 4px;
  box-shadow: 0 4px 20px #0003; font-size: var(--ai-chat-font-size);
}
.ai-chat-window[hidden], .ai-chat-window [hidden] { display: none !important; }
.ai-chat-header, .ai-chat-controls { display: flex; align-items: center; gap: var(--ai-chat-gap); padding: 12px; border-bottom: 1px solid var(--map-control-border); }
.ai-chat-header h2 { margin: 0; font-size: 16px; font-weight: 600; }
.ai-chat-header small { margin-left: auto; font-size: 11px; color: var(--map-control-muted); overflow-wrap: anywhere; }
.ai-chat-controls { flex-wrap: wrap; gap: 8px; }
.ai-chat-controls label { display: flex; align-items: center; gap: 8px; min-width: 0; max-width: 100%; }
.ai-chat-controls label > span { flex-shrink: 0; }
.ai-chat-controls select { min-width: 0; max-width: 100%; }
.ai-chat-window button, .ai-chat-window select, .ai-chat-window textarea {
  font: inherit; color: inherit; background: var(--map-control-bg);
  border: 1px solid var(--map-control-border); border-radius: 4px;
}
.ai-chat-window button, .ai-chat-window select { min-height: 32px; padding: 4px 8px; }
.ai-chat-window button { cursor: pointer; }
.ai-chat-window button:hover { border-color: var(--map-accent); }
.ai-chat-window button:disabled { opacity: .55; cursor: default; }
.ai-chat-window :is(button, select, textarea):focus-visible { outline: 2px solid var(--map-accent); outline-offset: 2px; }
.ai-chat-close { font-size: 20px !important; }
.ai-chat-log { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; padding: 12px; }
.ai-chat-empty, .ai-chat-hint, .ai-chat-context { color: var(--map-control-muted); font-size: 12px; }
.ai-chat-message { padding: 8px 0; border-bottom: 1px solid var(--map-control-border); }
.ai-chat-message > strong { display: block; font-weight: 600; font-size: var(--ai-chat-small-size); margin-bottom: 4px; }
.ai-chat-message > p { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0; line-height: 1.5; }
.ai-chat-answer { min-width: 0; overflow-wrap: anywhere; line-height: 1.65; }
.ai-chat-answer :is(p, ul, ol, blockquote, pre, .ai-table-wrap) { margin: 0 0 var(--ai-chat-content-space); }
.ai-chat-answer > :last-child { margin-bottom: 0; }
.ai-chat-answer :is(h3, h4, h5, h6) { font-size: var(--ai-chat-title-size); font-weight: 600; line-height: 1.4; margin: var(--ai-chat-gap) 0 var(--ai-chat-content-space); }
.ai-chat-answer > :first-child { margin-top: 0; }
.ai-chat-answer strong { font-weight: 600; }
.ai-chat-answer :is(ul, ol) { padding-left: 24px; }
.ai-chat-answer li + li { margin-top: 4px; }
.ai-chat-answer li > :is(ul, ol) { margin: 4px 0 0; }
.ai-chat-answer blockquote { padding-left: var(--ai-chat-content-space); border-left: 2px solid var(--map-control-border); color: var(--map-control-muted); }
.ai-chat-answer code { font-family: monospace; font-size: var(--ai-chat-small-size); background: color-mix(in srgb, var(--map-control-text) 6%, var(--map-control-bg)); padding: 0 4px; }
.ai-chat-answer pre { max-width: 100%; overflow: auto; padding: var(--ai-chat-content-space); background: color-mix(in srgb, var(--map-control-text) 6%, var(--map-control-bg)); }
.ai-chat-answer pre code { padding: 0; background: none; white-space: pre; }
.ai-chat-answer .ai-table-wrap { max-width: 100%; overflow-x: auto; }
.ai-chat-answer table { width: 100%; border-collapse: collapse; font-size: var(--ai-chat-small-size); font-variant-numeric: tabular-nums; }
.ai-chat-answer :is(th, td) { padding: 4px var(--ai-chat-content-space); text-align: left; vertical-align: top; border-bottom: 1px solid var(--map-control-border); }
.ai-chat-answer th { font-weight: 600; color: var(--map-control-muted); }
.ai-chat-answer a { color: var(--map-accent); text-decoration: underline; }
.ai-chat-answer a:hover { text-decoration-thickness: 2px; }
.ai-chat-answer a:focus-visible { outline: 2px solid var(--map-accent); outline-offset: 2px; }
.ai-chat-answer hr { margin: var(--ai-chat-gap) 0; border: 0; border-top: 1px solid var(--map-control-border); }
.ai-chat-message small { display: block; margin-top: 4px; font-size: 12px; color: var(--map-control-muted); }
.ai-chat-message.is-user { border-left: 2px solid var(--map-accent); padding-left: 8px; }
.ai-chat-progress { display: flex; align-items: center; gap: 12px; padding: 8px 12px; }
.ai-chat-ring { --progress: 0deg; width: 48px; height: 48px; padding: 4px; flex-shrink: 0; border-radius: 50%; background: conic-gradient(var(--map-accent) var(--progress), var(--map-control-border) 0); }
.ai-chat-ring span { width: 100%; height: 100%; display: grid; place-items: center; background: var(--map-control-bg); border-radius: 50%; font-weight: 600; font-variant-numeric: tabular-nums; }
.ai-chat-error { color: var(--map-control-danger); padding: 8px 12px; margin: 0; font-size: 12px; }
.ai-chat-context { margin: 0; padding: 4px 12px; }
.ai-chat-form { padding: 12px; border-top: 1px solid var(--map-control-border); }
.ai-chat-form textarea { display: block; width: 100%; resize: vertical; min-height: 64px; max-height: 144px; padding: 8px; }
.ai-chat-form-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-top: 8px; }
.ai-chat-hint { margin: 8px 0 0; line-height: 1.4; }
@media (prefers-color-scheme: dark) {
  .ai-chat-window { --map-control-bg: #101c2a; --map-control-text: #e2e8f0; --map-control-muted: #a9b7c8; --map-control-border: #526174; --map-accent: #7dd3fc; --map-control-danger: #fda4af; }
}
@media (max-width: 480px) {
  .ai-chat-window { right: 8px; bottom: 8px; width: calc(100vw - 16px); height: min(560px, calc(100dvh - 88px)); }
  .ai-chat-window button, .ai-chat-window select { min-height: 40px; }
}