:root{--bg-rail:#202c33;--bg-sidebar:#111b21;--bg-main:#0b141a;--bg-hover:#222d34;--txt-main:#e9edef;--txt-sec:#8696a0;--green:#00a884;--wa-sent:#005c4b;--wa-recv:#202c33}[data-theme=light]{--bg-rail:#f0f2f5;--bg-sidebar:#fff;--bg-main:#efeae2;--bg-hover:#f5f6f6;--txt-main:#111b21;--txt-sec:#667781;--green:#008069;--wa-sent:#dcf8c6;--wa-recv:#fff}*{box-sizing:border-box;outline:none;margin:0;padding:0}body{background:var(--bg-main);color:var(--txt-main);height:100vh;font-family:Segoe UI,sans-serif;overflow:hidden}.app-layout{width:100vw;height:100vh;display:flex;overflow:hidden}.main-layout-wrapper{flex:1;height:100%;display:flex;overflow:hidden}.nav-rail{background:var(--bg-rail);border-right:1px solid #ffffff0d;flex-direction:column;flex-shrink:0;justify-content:space-between;align-items:center;width:85px;padding:20px 0;display:flex}.rail-item{cursor:pointer;flex-direction:column;align-items:center;width:100%;margin-bottom:25px;transition:all .2s;display:flex}.rail-item.active{color:var(--green);border-left:3px solid var(--green)}.rail-icon{font-size:32px}.rail-label{color:var(--txt-sec);margin-top:5px;font-size:10px;font-weight:700}.sidebar{background:var(--bg-sidebar);border-right:1px solid #ffffff0d;flex-direction:column;flex-shrink:0;width:350px;display:flex}.sidebar-header{padding:15px 20px;font-weight:700}.search-box{padding:10px 15px}.search-box input{background:var(--bg-hover);color:#fff;border:none;border-radius:8px;width:100%;padding:10px}.contact-list{flex:1;overflow-y:auto}.contact-item{cursor:pointer;border-bottom:1px solid #ffffff05;gap:15px;padding:12px 15px;display:flex}.contact-item.active{background:var(--bg-hover)}.avatar{background:#53616a;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;font-weight:700;display:flex}.main-stage{background:var(--bg-main);flex-direction:column;flex:1;height:100%;display:flex;overflow:hidden}.chat-window{flex-direction:column;width:100%;height:100%;display:flex}.chat-header{background:var(--bg-rail);border-bottom:1px solid #ffffff0d;flex-shrink:0;align-items:center;gap:15px;padding:10px 20px;display:flex}.avatar-small{background:#4f5e67;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.chat-header-info h3{font-size:1rem}.chat-header-info p{color:var(--green);font-size:.75rem}.header-icons{color:var(--txt-sec);letter-spacing:12px;cursor:pointer;margin-left:auto}.messages-box{background-image:url(https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png);background-repeat:repeat;background-size:400px;flex-direction:column;flex:1;gap:4px;padding:20px;display:flex;overflow-y:auto}.msg-wrapper{width:100%;margin-bottom:2px;display:flex}.msg-wrapper.sent{justify-content:flex-end}.msg-bubble{border-radius:8px;max-width:65%;padding:6px 12px;font-size:.95rem;box-shadow:0 1px .5px #00000021}.received .msg-bubble{background:var(--wa-recv);border-top-left-radius:0}.sent .msg-bubble{background:var(--wa-sent);border-top-right-radius:0}.msg-time{color:var(--txt-sec);text-align:right;margin-top:4px;font-size:.65rem;display:block}.file-icon-small{font-size:20px}.file-msg-info{flex-direction:column;display:flex;overflow:hidden}.file-msg-info strong{white-space:nowrap;text-overflow:ellipsis;font-size:.85rem;overflow:hidden}.file-msg-info span{opacity:.7;font-size:.7rem}.input-bar{background:var(--bg-rail);flex-shrink:0;align-items:center;gap:15px;padding:10px 20px;display:flex}.input-icon{color:var(--txt-sec);cursor:pointer;font-size:24px}.input-bar input{background:var(--bg-hover);color:#fff;border:none;border-radius:8px;flex:1;padding:12px}.input-bar button{color:var(--txt-sec);cursor:pointer;background:0 0;border:none;font-size:24px;transition:all .2s}.input-bar button.active{color:var(--green)}.full-view-panel{flex:1;height:100%;padding:40px;overflow-y:auto}.kb-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:15px;margin-top:20px;display:grid}.file-box{background:var(--bg-rail);border-radius:12px;align-items:center;gap:10px;padding:15px;display:flex}.mobile-header,.back-btn{display:none}@media (max-width:768px){.nav-rail{z-index:10000;height:calc(100vh - 60px);transition:all .3s;position:fixed;top:60px;left:-100%;width:250px!important}.nav-rail.mobile-visible{left:0}.mobile-header{background:var(--bg-rail);flex-shrink:0;justify-content:space-between;align-items:center;height:60px;padding:0 20px;display:flex}.sidebar.mobile-hide,.main-stage.mobile-hide{display:none}.sidebar,.main-stage{width:100%!important;height:calc(100vh - 60px)!important}.back-btn{color:var(--green);cursor:pointer;font-size:22px;display:block}}.custom-scroll::-webkit-scrollbar{width:6px}.custom-scroll::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:10px}.kb-btn{background:var(--bg-hover);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:35px;height:35px;font-size:16px;transition:background .2s;display:flex}.chat-file-msg{align-items:center;gap:10px;min-width:150px;padding:5px 0;display:flex}.view-header{border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:25px;display:flex}.view-header .auth-btn{width:auto;margin:0;padding:12px 24px}.kb-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;max-height:65vh;padding:10px 0;display:grid;overflow-y:auto}.file-box{background:var(--bg-rail);border:1px solid #ffffff0d;border-radius:12px;align-items:center;gap:15px;padding:18px;transition:transform .2s;display:flex}.file-box:hover{background:var(--bg-hover);transform:translateY(-4px)}.file-actions{gap:8px;margin-left:auto;display:flex}.kb-btn{background:var(--bg-main);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;text-decoration:none;transition:all .2s;display:flex}.kb-btn.view:hover{background:var(--green);color:#fff}.kb-btn.delete:hover{color:#fff;background:#ea4335}.empty-notice{color:var(--txt-sec);text-align:center;grid-column:1/-1;padding:40px}.media-img-wrapper{flex-direction:column;gap:6px;max-width:280px;display:flex}.media-img{object-fit:cover;cursor:zoom-in;border-radius:8px;width:100%;max-width:280px;max-height:300px;transition:opacity .2s;display:block}.media-img:hover{opacity:.9}.media-video-wrapper{flex-direction:column;gap:6px;max-width:280px;display:flex}.media-video{border-radius:8px;width:100%;max-width:280px;display:block}.media-caption{color:var(--txt-main);padding:0 2px;font-size:.88rem}.media-loading{color:var(--txt-sec);align-items:center;gap:10px;min-width:160px;padding:10px 4px;font-size:.82rem;display:flex}.media-spinner{border:2px solid #ffffff26;border-top-color:var(--green);border-radius:50%;flex-shrink:0;width:18px;height:18px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.file-card{background:#0000002e;border-radius:10px;align-items:center;gap:12px;min-width:220px;max-width:280px;padding:10px 12px;display:flex}[data-theme=light] .file-card{background:#0000000f}.file-card-icon{flex-shrink:0;font-size:28px}.file-card-info{flex-direction:column;flex:1;gap:2px;display:flex;overflow:hidden}.file-card-info strong{white-space:nowrap;text-overflow:ellipsis;color:var(--txt-main);font-size:.85rem;overflow:hidden}.file-card-type{color:var(--txt-sec);text-transform:uppercase;letter-spacing:.03em;font-size:.7rem}.file-card-err{color:#e8b000;white-space:nowrap;font-size:.72rem}.file-card-actions{flex-direction:column;flex-shrink:0;gap:6px;display:flex}.file-card-btn{cursor:pointer;background:#ffffff1a;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:15px;text-decoration:none;transition:background .2s,transform .15s;display:flex}.file-card-btn:hover{background:var(--green);transform:scale(1.1)}.file-card-btn.download:hover{background:#0a84ff}:root{--accent:#00a884}[data-theme=light]{--accent:#008069}.auth-container{background:var(--bg-main);justify-content:center;align-items:center;width:100vw;min-height:100vh;font-family:Segoe UI,sans-serif;display:flex}.auth-card{background:var(--bg-sidebar);text-align:center;border:1px solid #ffffff14;border-radius:16px;flex-direction:column;gap:20px;width:100%;max-width:400px;padding:40px;animation:.4s ease-out popIn;display:flex;box-shadow:0 8px 32px #0006}[data-theme=light] .auth-card{border:1px solid #00000014;box-shadow:0 8px 32px #00000014}.auth-card h2{color:var(--txt-main);margin-bottom:5px;font-size:1.6rem;font-weight:700}.auth-card form{flex-direction:column;gap:15px;display:flex}.auth-input{background:var(--bg-hover);width:100%;color:var(--txt-main);border:1px solid #ffffff1a;border-radius:8px;padding:12px 16px;font-size:.95rem;transition:all .2s}[data-theme=light] .auth-input{background:#f0f2f5;border:1px solid #0000001f}.auth-input:focus{border-color:var(--green);box-shadow:0 0 0 2px #00a88433}.auth-btn{background:var(--green);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px;font-size:1rem;font-weight:600;transition:background .2s,transform .1s}.auth-btn:hover{background:#008f70}.auth-btn:active{transform:scale(.98)}@keyframes popIn{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.loading-overlay{background:var(--bg-main);color:var(--txt-main);z-index:9999;justify-content:center;align-items:center;font-family:Segoe UI,sans-serif;font-size:1.2rem;font-weight:600;display:flex;position:fixed;inset:0}