/* Живые части «Полезного знания» (№ 1256, этап 4): ИИ-ассистент, поиск, письмо автору. Цвета — как у чата AI Engine
   живого сайта (тема ChatGPT: акцент #AB5F17, кнопка #D77B23, тёмное окно #302E2A). */
.pz-ch-puzyr{position:fixed;right:30px;bottom:30px;z-index:9998;width:60px;height:60px;border-radius:50%;border:0;cursor:pointer;
  background:#D77B23;color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(215,123,35,.45);padding:0}
.pz-ch-puzyr:hover{background:#c46d1b}
.pz-chat-okno{position:fixed;right:30px;bottom:105px;z-index:9999;width:420px;max-width:calc(100vw - 20px);height:min(620px,calc(100vh - 140px));
  display:none;flex-direction:column;background:#302E2A;color:#D1CFC9;border:1px solid #333;border-radius:15px;overflow:hidden;
  box-shadow:0 12px 40px rgba(0,0,0,.35);font-family:Helvetica,Arial,sans-serif;font-size:15px}
html.pz-ch-otkryt .pz-chat-okno{display:flex}
.pz-ch-shapka{display:flex;align-items:center;gap:8px;padding:12px 14px;background:#242320}
.pz-ch-zag{flex:1;display:flex;flex-direction:column;line-height:1.25}.pz-ch-zag span{font-size:12px;opacity:.7}
.pz-ch-ochist,.pz-ch-zakr{background:none;border:0;color:#D1CFC9;cursor:pointer;font-size:13px;padding:4px 6px}
.pz-ch-zakr{font-size:24px;line-height:1}
.pz-ch-lenta{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:12px}
.pz-ch-soobshchenie{max-width:92%;line-height:1.55}
.pz-ch-user{align-self:flex-end;background:#AB5F17;color:#fff;border-radius:14px 14px 4px 14px;padding:8px 12px;white-space:pre-wrap}
.pz-ch-ai{align-self:flex-start;text-align:left;background:#2B2A27;border-radius:14px 14px 14px 4px;padding:10px 14px}
.pz-ch-ai p{margin:0 0 .6em}.pz-ch-ai p:last-child{margin:0}.pz-ch-ai ul,.pz-ch-ai ol{margin:0 0 .6em 1.2em;padding:0}
.pz-ch-ai a{color:#E8954A;text-decoration:underline}.pz-ch-ai blockquote{margin:0 0 .6em;padding-left:10px;border-left:3px solid #AB5F17}
.pz-ch-istochniki{margin-top:8px;font-size:12.5px;opacity:.85}.pz-ch-istochniki a{color:#E8954A}
.pz-ch-zhdu span{display:inline-block;width:7px;height:7px;margin:0 2px;border-radius:50%;background:#D1CFC9;animation:pzt 1s infinite ease-in-out}
.pz-ch-zhdu span:nth-child(2){animation-delay:.15s}.pz-ch-zhdu span:nth-child(3){animation-delay:.3s}
@keyframes pzt{0%,80%,100%{opacity:.25}40%{opacity:1}}
.pz-ch-vvod{padding:10px 12px 8px;border-top:1px solid #3a3833}
.pz-ch-forma{display:flex;align-items:flex-end;gap:8px;background:#fff;border:1px solid #e3dfd6;border-radius:24px;padding:6px 6px 6px 14px}
.pz-ch-pole{flex:1;border:0!important;outline:0;resize:none;background:transparent!important;color:#242320;font:15px/1.4 Helvetica,Arial,sans-serif;
  padding:7px 0!important;min-height:22px;box-shadow:none!important}
.pz-ch-otpravit{flex:none;width:32px;height:32px;border-radius:50%;border:0;background:#8f8b84;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0}
.pz-ch-otpravit:hover{background:#AB5F17}.pz-ch-otpravit:disabled{opacity:.5;cursor:wait}
.pz-ch-podval{font-size:11px;opacity:.7;padding:7px 4px 0}.pz-ch-podval a{color:inherit;text-decoration:underline}
.pz-ch-ostatok{margin-top:3px;font-variant-numeric:tabular-nums}
/* встроенный чат на главной — светлый, как блок AI Engine на живом сайте */
.pz-chat-vstroen{max-width:652px;margin:36px auto 18px;background:#ECE8E0;border:1px solid #DDD8CE;border-radius:15px;overflow:hidden;
  font-family:Helvetica,Arial,sans-serif;color:#242320;text-align:left}
.pz-chat-vstroen .pz-ch-lenta{display:none;max-height:460px;background:#F7F5F0}
.pz-chat-vstroen.pz-ch-est .pz-ch-lenta{display:flex}
.pz-chat-vstroen .pz-ch-ai{background:#fff;color:#242320;border:1px solid #e6e1d8}.pz-chat-vstroen .pz-ch-ai a,.pz-chat-vstroen .pz-ch-istochniki a{color:#AB5F17}
.pz-chat-vstroen .pz-ch-zhdu span{background:#8f8b84}
.pz-chat-vstroen .pz-ch-vvod{border-top:0;padding:15px 15px 0}.pz-chat-vstroen .pz-ch-podval{margin:15px -15px 0;padding:10px 15px 12px;border-top:1px solid #DDD8CE;color:#5a5650}
body.dark-mode .pz-chat-vstroen{background:#2B2A27;border-color:#3a3833;color:#D1CFC9}
body.dark-mode .pz-chat-vstroen .pz-ch-lenta{background:#302E2A}body.dark-mode .pz-chat-vstroen .pz-ch-ai{background:#2B2A27;color:#D1CFC9;border-color:#3a3833}
body.dark-mode .pz-chat-vstroen .pz-ch-podval{color:#a9a59d;border-color:#3a3833}
/* поиск и письмо */
#pz-poisk-forma{margin:0 0 28px}#pz-poisk-forma .search-form{max-width:640px}
.pz-poisk-itog{font-family:Inter,sans-serif;font-size:14px;opacity:.75}
.pz-poisk-kartochka{padding:22px 0;border-bottom:1px solid #e3dfd6}
.pz-poisk-kartochka h2{font-size:22px;margin:4px 0 6px;font-family:Inter,sans-serif}.pz-poisk-kartochka h2 a{text-decoration:none;color:inherit}
.pz-poisk-rubriki{font:600 12px Inter,sans-serif;text-transform:uppercase;letter-spacing:.05em;color:#D77B23}
.pz-poisk-data{font:14px Inter,sans-serif;opacity:.7;margin-bottom:8px}
#pz-pismo{max-width:640px;display:grid;gap:14px;font-family:Inter,sans-serif}
#pz-pismo label{display:grid;gap:6px;font-size:14px}#pz-pismo input,#pz-pismo textarea{width:100%;font:16px/1.5 Inter,sans-serif;padding:10px 12px;border:1px solid #d8d3c9;border-radius:10px}
#pz-pismo .pz-lovushka{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
#pz-pismo button{justify-self:start;background:#D77B23;color:#fff;border:0;border-radius:24px;padding:11px 26px;font:600 15px Inter,sans-serif;cursor:pointer}
#pz-pismo-itog{font-size:14px}
@media (max-width:600px){.pz-ch-puzyr{right:16px;bottom:16px;width:54px;height:54px}
  .pz-chat-okno{right:10px;bottom:80px;height:calc(100vh - 100px)}}