:root{--bg: #f5faf8;--sidebar: #edf6f2;--sidebar-hover: #dff0e9;--main: #fbfdfc;--composer: #ffffff;--border: #d8d8dc;--text: #202123;--muted: #5f6368;--dim: #767b85;--user-bubble: #dff3eb;--accent: #10a37f;--radius: 22px;font-family:Segoe UI,system-ui,sans-serif}:root[data-theme=dark]{--bg:#212121;--sidebar:#171717;--sidebar-hover:#212121;--main:#212121;--composer:#303030;--border:#3e3e3e;--text:#ececec;--muted:#b4b4b4;--dim:#8f8f8f;--user-bubble:#2f2f2f}:root[data-theme=dark] .chat-search{background:#242424;border-color:#454545;color:#ececec}:root[data-theme=dark] .chat-item{color:#d9d9d9}:root[data-theme=dark] .chat-item.active,:root[data-theme=dark] .profile.active{background:#2f2f2f}:root[data-theme=dark] .profile-menu{background:#292929;border-color:#414141}:root[data-theme=dark] .profile-menu button:hover{background:#3a3a3a}:root[data-theme=dark] .composer{background:#303030;border-color:#444}:root[data-theme=dark] .send{background:#fff;color:#000}:root[data-theme=dark] .send:disabled{background:#676767;color:#2f2f2f}:root[data-theme=dark] .older-messages button,:root[data-theme=dark] .jump-to-latest{background:#282828;border-color:#454545;color:#d7d7d7}:root[data-theme=dark] .documents-panel,:root[data-theme=dark] .admin-documents-card{background:#292929;border-color:#464646}:root[data-theme=dark] .document-row{background:#333}:root[data-theme=dark] .upload-primary{background:#f4f4f4;color:#171717}:root[data-theme=dark] .auth-card{background:#191919;border-color:#383838}:root[data-theme=dark] .auth-form input{background:#242424;border-color:#454545;color:#ececec}:root[data-theme=dark] .auth-form label{color:#d5d5d5}:root[data-theme=dark] .welcome-copy span{background:none;-webkit-background-clip:initial;background-clip:initial;color:#fff;-webkit-text-fill-color:#ffffff;text-shadow:none}:root:not([data-theme=dark]) .icon-btn:hover,:root:not([data-theme=dark]) .chat-item.active,:root:not([data-theme=dark]) .profile.active{background:#e5e5e7}:root:not([data-theme=dark]) .profile-menu{background:#fff;border-color:#d5d5d8;box-shadow:0 12px 30px #0000001f}:root:not([data-theme=dark]) .profile-menu button:hover{background:#f0f0f2}:root:not([data-theme=dark]) .composer{border-color:#c9c9ce;box-shadow:0 1px 3px #0000000f}:root:not([data-theme=dark]) .documents-panel,:root:not([data-theme=dark]) .admin-documents-card{background:#fff;border-color:#d7d7dc;box-shadow:0 18px 45px #0000001a}:root:not([data-theme=dark]) .auth-card{background:#fff;border-color:#d8d8dc;box-shadow:0 24px 80px #0000001a}:root:not([data-theme=dark]) .auth-form input{background:#fafafa;border-color:#c9c9ce;color:#202123}:root:not([data-theme=dark]) .auth-form label{color:#3f4248}:root:not([data-theme=dark]) .auth-submit{background:#202123;color:#fff}:root:not([data-theme=dark]) .auth-switch button{color:#202123;padding:5px 7px;margin:-5px -7px;border-radius:6px}:root:not([data-theme=dark]) .auth-switch button:hover{background:#e7e7e9}:root:not([data-theme=dark]) .older-messages button,:root:not([data-theme=dark]) .jump-to-latest{background:#fff;border-color:#c9c9ce;color:#454545}:root:not([data-theme=dark]) .voice-btn:hover,:root:not([data-theme=dark]) .voice-btn.listening{background:#e5e5e7;color:#202123}:root:not([data-theme=dark]) .chat-search{background:#fff;border-color:#d1d1d6;color:#202123}:root:not([data-theme=dark]) .chat-item{color:#3f4248}:root:not([data-theme=dark]) .chat-item:hover{background:#dff0e9}:root:not([data-theme=dark]) .chat-item.active{background:#cfe9df;color:#174b3d}:root:not([data-theme=dark]) .profile.active{background:#e5e5e7}:root:not([data-theme=dark]) .profile-menu{background:#fff}:root:not([data-theme=dark]) .older-messages button:hover,:root:not([data-theme=dark]) .jump-to-latest:hover{background:#f0f0f2;border-color:#a9a9b0}:root:not([data-theme=dark]) .composer{background:#fff;border-color:#c9c9ce}:root:not([data-theme=dark]) .send{background:#202123;color:#fff}:root:not([data-theme=dark]) .send:disabled{background:#d0d0d4;color:#888b91}:root:not([data-theme=dark]) .documents-panel{background:#fff;border-color:#d7d7dc}:root:not([data-theme=dark]) .document-row{background:#f4f4f6}:root:not([data-theme=dark]) .admin-document-row{border-bottom:1px solid #ededf0}:root:not([data-theme=dark]) .admin-documents-card{background:#fff;border-color:#d7d7dc}:root:not([data-theme=dark]) .auth-screen{background:#f7f7f8}:root:not([data-theme=dark]) .auth-card{background:#fff;border-color:#d8d8dc}*{box-sizing:border-box;margin:0;padding:0}html,body,#root,.app{height:100%}.app.sidebar-hidden{grid-template-columns:1fr}.app.sidebar-hidden .sidebar{display:none}body{background:var(--bg);color:var(--text);overflow:hidden}button,textarea{font:inherit;color:inherit}.app{display:grid;grid-template-columns:260px 1fr}.sidebar{background:var(--sidebar);display:flex;flex-direction:column;min-width:0;border-right:1px solid #000}.sidebar-top{display:flex;gap:8px;padding:12px}.new-chat,.profile,.chat-item{width:100%;display:flex;align-items:center;gap:10px;background:transparent;border:1px solid transparent;color:var(--text);cursor:pointer;text-align:left}.chat-search{width:calc(100% - 20px);margin:3px 10px 8px;padding:8px 10px;border:1px solid #343434;border-radius:9px;background:#242424;color:var(--text);outline:none;font-size:12px}.chat-rename-input{width:100%;min-width:0;border:1px solid #8fcab7;border-radius:6px;padding:4px 6px;background:var(--main);color:var(--text);outline:none;font-size:13px}.new-chat{height:40px;padding:0 12px;border-radius:10px;border-color:var(--border);font-size:14px}.new-chat:hover,.chat-item:hover,.profile:hover{background:var(--sidebar-hover)}.profile.active{background:#2f2f2f}.new-chat svg,.icon-btn svg,.send svg,.attach svg{width:18px;height:18px;display:block}.sidebar-top .sidebar-close{display:none}.chat-list{flex:1;overflow:auto;padding:4px 8px 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small{display:block;margin-top:5px;color:var(--dim);font-size:12px}.composer textarea{flex:1;resize:none;border:0;background:transparent;outline:none;max-height:160px;padding:8px 4px;line-height:1.45}.voice-btn{width:34px;height:34px;border:0;border-radius:50%;background:transparent;color:var(--muted);cursor:pointer;font-size:17px;line-height:1}.voice-btn:hover,.voice-btn.listening{background:#444;color:#fff}.voice-error{margin-top:7px;color:#b54747;text-align:center;font-size:12px}:root[data-theme=dark] .welcome-copy span{background:none!important;background-image:none!important;-webkit-background-clip:initial!important;background-clip:initial!important;color:#fff!important;-webkit-text-fill-color:#ffffff!important;text-shadow:none!important}.send{width:36px;height:36px;border:0;border-radius:50%;background:#fff;color:#000;cursor:pointer;display:grid;place-items:center;flex-shrink:0}.send:disabled{background:#676767;color:#2f2f2f;cursor:default}.disclaimer{text-align:center;color:var(--dim);font-size:12px;margin-top:8px}.overlay{display:none}.empty-history{padding:10px;color:var(--dim);font-size:13px}.empty small{color:var(--dim);font-size:13px;font-weight:400;margin-top:10px}.chat-status{width:min(768px,calc(100% - 32px));margin:0 auto 16px;color:var(--muted);font-size:13px;text-align:center}.chat-status.error,.auth-error{color:#ff8c8c}.auth-screen{min-height:100%;display:grid;place-items:center;padding:24px;background:var(--bg)}.auth-card{width:min(100%,400px);padding:34px;border:1px solid #383838;border-radius:20px;background:#191919;box-shadow:0 24px 80px #00000040}.auth-mark{width:42px;height:42px;display:grid;place-items:center;margin:0 auto 22px;border-radius:50%;background:var(--accent);color:#fff;font-size:20px;font-weight:700}.auth-card h1{text-align:center;font-size:24px;font-weight:600}.auth-subtitle{margin:9px 0 24px;color:var(--muted);font-size:14px;text-align:center}.auth-form{display:grid;gap:16px}.auth-form label{display:grid;gap:7px;color:#d5d5d5;font-size:13px}.auth-form input{width:100%;height:44px;padding:0 12px;border:1px solid #454545;border-radius:10px;outline:none;background:#242424;color:var(--text)}.auth-form 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