:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f6f8;--panel:#fff;--text:#202b36;--muted:#788795;--line:#e5eaf0;--accent:#527da3;--accent-strong:#3c6e97;--incoming:#fff;--outgoing:#d9fdd3;--input:#f3f6f8;--shadow:0 18px 60px #1d34451a;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#17212b;--panel:#202b36;--text:#e8edf2;--muted:#93a4b4;--line:#2d3a47;--accent:#6aa4d4;--accent-strong:#78b4e6;--incoming:#263442;--outgoing:#2b594a;--input:#17212b;--shadow:0 18px 60px #0004}@media (prefers-color-scheme:dark){:root[data-theme=system]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#17212b;--panel:#202b36;--text:#e8edf2;--muted:#93a4b4;--line:#2d3a47;--accent:#6aa4d4;--accent-strong:#78b4e6;--incoming:#263442;--outgoing:#2b594a;--input:#17212b;--shadow:0 18px 60px #0004}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}button,input,select{font:inherit}button{cursor:pointer;color:inherit}.auth-shell{background:radial-gradient(ellipse at top,#91b5d033,transparent 55%),var(--bg);place-items:center;min-height:100dvh;padding:24px;display:grid}.auth-card{background:var(--panel);border:1px solid var(--line);width:min(100%,390px);box-shadow:var(--shadow);text-align:center;border-radius:24px;padding:36px}.brand-mark{background:var(--accent);color:#fff;border-radius:18px;place-items:center;width:54px;height:54px;margin:auto;font-size:27px;font-weight:700;display:grid}.auth-card h1{margin:16px 0 6px;font-size:28px}.muted,small{color:var(--muted)}.stack{text-align:left;gap:16px;margin-top:28px;display:grid}.stack label{gap:8px;font-size:13px;font-weight:600;display:grid}.stack input,.search-form input,.composer input{border:1px solid var(--line);background:var(--input);width:100%;min-width:0;color:var(--text);border-radius:12px;outline:none;padding:13px 14px}.stack input:focus,.search-form input:focus,.composer input:focus{border-color:var(--accent)}.primary{background:var(--accent);color:#fff;border:0;border-radius:12px;padding:13px 16px;font-weight:600}.primary:hover{background:var(--accent-strong)}.link{color:var(--accent-strong);background:0 0;border:0;padding:12px 4px}.theme-row{border-top:1px solid var(--line);justify-content:space-between;align-items:center;margin-top:20px;padding-top:18px;font-size:13px;display:flex}.theme-row select,.header-actions select{border:1px solid var(--line);background:var(--input);color:var(--text);border-radius:9px;padding:7px}.error{color:#d14c4c;background:#d14c4c12;border:1px solid #d14c4c44;border-radius:10px;padding:10px 12px;font-size:13px}.app-shell{background:var(--panel);grid-template-columns:350px minmax(0,1fr);height:100dvh;max-height:100dvh;padding:0;display:grid}.sidebar{border-right:1px solid var(--line);background:var(--panel);flex-direction:column;min-height:0;display:flex}.side-header,.conversation-header{border-bottom:1px solid var(--line);flex-shrink:0;align-items:center;gap:12px;height:76px;padding:0 18px;display:flex}.side-header{justify-content:space-between}.side-header>div:first-child{gap:4px;display:grid}.side-header strong{font-size:18px}.side-header small{font-size:12px}.header-actions{align-items:center;gap:7px;display:flex}.icon-button,.back-button{color:var(--muted);background:0 0;border:0;padding:8px;font-size:22px}.search-form{border-bottom:1px solid var(--line);gap:8px;padding:14px;display:flex}.search-form input{padding:11px 13px}.search-form button{background:var(--accent);color:#fff;border:0;border-radius:12px;flex-shrink:0;width:44px;font-size:24px}.chat-list{flex:1;overflow:auto}.chat-item{text-align:left;border:0;border-bottom:1px solid var(--line);background:0 0;align-items:center;gap:12px;width:100%;padding:13px 16px;display:flex}.chat-item:hover,.chat-item.selected{background:var(--input)}.avatar{color:#fff;background:linear-gradient(145deg,#8fb5d6,#527da3);border-radius:50%;flex-shrink:0;place-items:center;width:44px;height:44px;font-size:17px;font-weight:600;display:grid}.chat-preview{flex:1;min-width:0}.chat-title{justify-content:space-between;align-items:center;gap:8px;display:flex}.chat-title strong{font-size:14px}.chat-title time{color:var(--muted);font-size:11px}.chat-preview p{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;margin:6px 0 0;font-size:12px;overflow:hidden}.sidebar-footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;padding:12px 16px;font-size:11px;display:flex}.sidebar-footer .link{font-size:12px}.conversation{background:var(--bg);flex-direction:column;min-width:0;display:flex;position:relative}.conversation-header{background:var(--panel)}.conversation-header>div:last-child{gap:5px;display:grid}.conversation-header strong{font-size:15px}.conversation-header small{font-size:12px}.back-button{display:none}.messages{background-image:radial-gradient(var(--line) .7px,transparent .7px);background-size:18px 18px;flex-direction:column;flex:1;align-items:flex-start;gap:8px;padding:24px clamp(16px,5vw,70px);display:flex;overflow-y:auto}.message{background:var(--incoming);overflow-wrap:anywhere;white-space:pre-wrap;border-radius:14px 14px 14px 4px;max-width:min(75%,620px);padding:10px 12px 7px;font-size:14px;line-height:1.45;box-shadow:0 1px 2px #0000000b}.message.mine{background:var(--outgoing);border-radius:14px 14px 4px;align-self:flex-end}.message time{text-align:right;color:var(--muted);margin:4px 0 0 18px;font-size:10px;display:block}.composer{background:var(--panel);border-top:1px solid var(--line);gap:10px;padding:16px clamp(12px,4vw,48px);display:flex}.composer input{border-radius:24px;padding:14px 18px}.send-button{background:var(--accent);color:#fff;border:0;border-radius:50%;flex-shrink:0;width:48px;font-size:19px}.send-button:disabled{opacity:.45;cursor:default}.empty-view{place-items:center;display:grid}.empty-state{text-align:center;max-width:340px;padding:24px}.empty-icon{background:var(--input);width:78px;height:78px;color:var(--accent);border-radius:50%;place-items:center;margin:auto;font-size:34px;display:grid}.empty-state h2{margin:22px 0 8px;font-size:20px}.empty-state p{color:var(--muted);font-size:13px;line-height:1.6}.inline-error{margin:0 12px 8px}.modal-backdrop{z-index:10;background:#0007;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.admin-modal{background:var(--panel);width:min(100%,520px);max-height:85dvh;color:var(--text);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:20px;overflow:auto}.admin-modal header{justify-content:space-between;align-items:center;display:flex}.admin-modal header h2{font-size:20px}.admin-modal header button{background:0 0;border:0;font-size:25px}.admin-user{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:14px 0;display:flex}.admin-user>div{gap:5px;display:grid}.admin-user small{font-size:12px}.admin-user button{border:1px solid var(--line);background:var(--input);border-radius:9px;padding:8px;font-size:12px}@media (width<=700px){.app-shell{grid-template-columns:minmax(0,1fr)}.sidebar{grid-area:1/1}.conversation{display:none}.conversation.mobile-active{z-index:2;display:flex;position:absolute;inset:0}.sidebar.mobile-hidden{display:none}.back-button{display:block}.messages{padding:18px 12px}.message{max-width:88%}.side-header{height:66px}.auth-card{padding:28px 22px}}