#revit-chat { position: fixed; right: 22px; bottom: 22px; z-index: 1040; font: 14px/1.5 'Open Sans', sans-serif; color: #233047; }
#revit-chat * { box-sizing: border-box; }
#revit-chat [hidden] { display: none !important; }
#revit-chat button, #revit-chat select, #revit-chat textarea { font: inherit; }
#revit-chat button { cursor: pointer; border: 0; border-radius: 7px; }
#revit-chat button:disabled { cursor: wait; opacity: .55; }
#revit-chat :focus-visible { outline: 3px solid #38a7b3; outline-offset: 2px; }
#revit-chat a { color: #087881; }
#revit-chat #revit-chat-launcher { display: flex; align-items: center; gap: 12px; min-height: 64px; margin-left: auto; padding: 11px 20px 11px 12px; border: 2px solid #ffffffd9; border-radius: 34px; background: linear-gradient(115deg, #7038da, #315cdb 65%, #1765d5); color: #fff; box-shadow: 0 5px 22px #5744cf55, 0 0 0 4px #6354de12; text-align: left; transition: transform .18s ease, box-shadow .18s ease; }
#revit-chat #revit-chat-launcher:hover { transform: translateY(-2px); box-shadow: 0 8px 28px #5744cf70, 0 0 0 4px #6354de20; }
#revit-chat .rc-launcher-icon { display: grid; place-items: center; width: 36px; height: 36px; flex-shrink: 0; border-radius: 50%; background: #ffffff24; }
#revit-chat .rc-launcher-label { display: flex; flex-direction: column; gap: 1px; }
#revit-chat .rc-launcher-label strong { color: #fff; font-size: 17px; line-height: 1.2; font-weight: 700; }
#revit-chat .rc-launcher-label span { color: #f0edff; font-size: 11px; line-height: 1.4; }
#revit-chat-panel { display: flex; flex-direction: column; width: 410px; height: min(690px, calc(100dvh - 126px)); margin-bottom: 12px; background: #fff; border: 1px solid #dce3e7; border-radius: 15px; box-shadow: 0 12px 50px #142c4930; overflow: hidden; }
#revit-chat .rc-header { display: flex; align-items: center; justify-content: space-between; padding: 17px 20px; background: #163849; color: #fff; }
#revit-chat .rc-header strong { font-size: 16px; }
#revit-chat .rc-subtitle { display: block; color: #bacfd6; font-size: 12px; margin-top: 2px; }
#rc-close { background: transparent; color: #fff; font-size: 26px !important; padding: 0 6px; }
#revit-chat .rc-toolbar { display: flex; gap: 7px; padding: 10px 14px; border-bottom: 1px solid #e9edf0; }
#rc-history { min-width: 0; flex: 1; border: 0; background: white; font-size: 12px !important; }
#revit-chat .rc-toolbar button { padding: 5px 7px; background: #eef3f5; font-size: 12px; white-space: nowrap; }
#rc-delete { color: #657080; }
#rc-messages { flex: 1; min-height: 80px; overflow-y: auto; overscroll-behavior: contain; padding: 18px; }
#revit-chat .rc-empty { padding: 20px 3px; }
#revit-chat .rc-empty strong { display: block; font-size: 20px; margin-bottom: 10px; }
#revit-chat .rc-empty p { color: #657080; margin: 0 0 18px; }
#revit-chat .rc-suggestion { display: block; text-align: left; width: 100%; padding: 10px 12px; margin: 8px 0; background: #f2f6f7; color: #233047; }
#revit-chat .rc-message { margin: 0 0 18px; overflow-wrap: anywhere; }
#revit-chat .rc-message-label { display: block; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; font-weight: 700; margin-bottom: 5px; color: #718293; }
#revit-chat .rc-user .rc-message-body { padding: 10px 13px; background: #eaf2f4; border-radius: 10px 10px 2px 10px; white-space: pre-wrap; }
#revit-chat .rc-text { white-space: pre-wrap; }
#revit-chat .rc-message p { margin: 0 0 10px; }
#revit-chat .rc-message pre { background: #f3f5f7; color: #233047; border: 1px solid #e1e6eb; border-radius: 8px; padding: 12px; overflow-x: auto; white-space: pre; word-break: normal; overflow-wrap: normal; font-size: 12px; }
#revit-chat .rc-message code { color: #225567; background: #f1f5f7; font-size: 12px; }
#revit-chat .rc-message pre code { white-space: pre; word-break: normal; overflow-wrap: normal; }
#revit-chat .rc-copy { display: block; margin: 0 0 4px auto; padding: 3px 7px; background: #e4eaee; color: #233047; font-size: 11px; }
#revit-chat .rc-sources { border-top: 1px solid #e5ecee; padding-top: 8px; font-size: 11px; }
#revit-chat .rc-sources a { display: block; margin-top: 4px; }
#revit-chat .rc-retry { background: #edf3f4; padding: 7px 12px; color: #235764; }
#rc-status { margin: 0; padding: 0 18px; color: #657080; font-size: 12px; }
#rc-status:not(:empty) { padding-bottom: 8px; }
#rc-status.rc-thinking { display: flex; align-items: center; gap: 12px; flex-shrink: 0; margin: 0 14px 4px; padding: 12px 14px; border: 1px solid #dcd0ff; border-radius: 10px; background: #f4efff; color: #542bb4; }
#rc-status.rc-thinking::before { content: ''; width: 22px; height: 22px; flex-shrink: 0; border: 3px solid #d7c9f7; border-top-color: #6d3bd1; border-radius: 50%; animation: rc-thinking-spin .9s linear infinite; }
#revit-chat .rc-thinking-copy strong { display: block; font-size: 15px; line-height: 1.4; }
#revit-chat .rc-thinking-copy span { display: block; margin-top: 2px; font-size: 12px; color: #645580; }
@keyframes rc-thinking-spin { to { transform: rotate(360deg); } }
#revit-chat .rc-version { display: flex; align-items: center; gap: 6px; padding: 8px 16px; font-size: 11px; }
#revit-chat .rc-version label { margin: 0; }
#rc-year { border: 0; background: #eef3f5; border-radius: 4px; padding: 3px; }
#revit-chat .rc-version span { margin-left: auto; color: #748191; }
#rc-form { display: flex; align-items: flex-end; gap: 8px; margin: 0 14px 6px; padding: 9px; border: 1px solid #b9cbd2; border-radius: 10px; }
#rc-input { flex: 1; min-width: 0; resize: none; border: 0; outline: none; padding: 3px; max-height: 120px; background: #fff; color: #233047; }
#rc-send { padding: 8px 10px; background: #163849; color: #fff; white-space: nowrap; }
#revit-chat .rc-sponsor { display: block; padding: 13px 17px; background: #f0f6f5; border-top: 1px solid #dce9e6; color: #35535b; font-size: 11px; text-decoration: none; }
#revit-chat .rc-sponsor-label { display: block; font-size: 9px; letter-spacing: .1em; color: #748a8c; margin-bottom: 4px; }
#revit-chat .rc-sponsor strong { color: #126d6b; }
#revit-chat .rc-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
@media (max-width: 480px) {
  #revit-chat { right: 10px; bottom: max(10px, env(safe-area-inset-bottom)); }
  #revit-chat-panel { width: calc(100vw - 20px); height: calc(100dvh - 104px - env(safe-area-inset-bottom)); margin-bottom: 8px; }
  #revit-chat #revit-chat-launcher { min-height: 58px; padding: 8px 17px 8px 10px; }
  #rc-input { font-size: 16px !important; }
}
@media (prefers-reduced-motion: reduce) {
  #rc-status.rc-thinking::before { animation: none; }
  #revit-chat #revit-chat-launcher { transition: none; }
  #revit-chat #revit-chat-launcher:hover { transform: none; }
}
@media print { #revit-chat { display: none; } }