:root{--bg-0:#0b0e1a;--bg-1:#10152a;--glass:#ffffff0e;--glass-strong:#ffffff17;--glass-hover:#ffffff1f;--border:#ffffff17;--text-0:#eef0ff;--text-1:#a3a9c8;--text-2:#6f7598;--accent-0:#6c5ce7;--accent-1:#a855f7;--accent-2:#ec4899;--grad:linear-gradient(135deg, var(--accent-0), var(--accent-1) 55%, var(--accent-2));--green:#2fd573;--red:#f2545b;--radius:16px;--sidebar-w:320px;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:var(--font);color:var(--text-0);background:radial-gradient(1100px 700px at 85% -10%, #6c5ce747, transparent 60%), radial-gradient(900px 600px at -10% 110%, #ec489929, transparent 55%), radial-gradient(700px 500px at 50% 120%, #a855f71f, transparent 60%), var(--bg-0);-webkit-font-smoothing:antialiased}.hidden{display:none!important}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,textarea{color:var(--text-0);background:var(--glass);border:1px solid var(--border);border-radius:12px;outline:none;padding:12px 14px;font-family:inherit;font-size:14px;transition:border-color .15s,background .15s,box-shadow .15s}input:focus,textarea:focus{border-color:var(--accent-1);box-shadow:0 0 0 3px #a855f72e}input::placeholder,textarea::placeholder{color:var(--text-2)}#app{height:100vh;display:flex}#main-view{flex:1;min-width:0;height:100vh;display:flex}#sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);border-right:1px solid var(--border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:2;background:#0a0d1a8c;flex-direction:column;display:flex}#sidebar-header{justify-content:space-between;align-items:center;gap:8px;padding:14px 14px 10px;display:flex}#sidebar-actions{gap:6px;display:flex}.action-btn{border:1px solid var(--border);background:var(--glass);color:var(--text-1);cursor:pointer;white-space:nowrap;border-radius:10px;align-items:center;gap:4px;padding:6px 10px;font-size:12.5px;font-weight:600;transition:background .14s,color .14s,transform .1s;display:inline-flex}.action-btn:hover{background:var(--glass-hover);color:var(--text-0)}.action-btn:active{transform:scale(.96)}#btn-new-chat{background:var(--grad);color:#fff;border-color:#0000}#btn-new-chat:hover{filter:brightness(1.12)}.list-empty{text-align:center;color:var(--text-2);border:1px dashed var(--border);border-radius:14px;margin:18px 10px;padding:18px 14px;font-size:13px;line-height:1.5}#me-chip{align-items:center;gap:10px;min-width:0;display:flex}.me-name{white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.conn-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:background .3s}.conn-online{background:var(--green);box-shadow:0 0 8px #2fd573cc}.conn-connecting{background:#f5a623;box-shadow:0 0 8px #f5a62399}.conn-offline{background:var(--red);box-shadow:0 0 8px #f2545b99}#chat-list{flex-direction:column;flex:1;gap:2px;padding:4px 8px 12px;display:flex;overflow-y:auto}.chat-item{cursor:pointer;border-radius:14px;align-items:center;gap:12px;padding:9px 10px;transition:background .14s;display:flex;position:relative}.chat-item:hover{background:var(--glass)}.chat-item.active{background:linear-gradient(135deg,#6c5ce752,#a855f733);box-shadow:inset 0 0 0 1px #a855f759}.chat-item-body{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.chat-item-top,.chat-item-bottom{justify-content:space-between;align-items:center;gap:8px;min-width:0;display:flex}.chat-item-name{white-space:nowrap;text-overflow:ellipsis;font-size:14.5px;font-weight:600;overflow:hidden}.chat-item-time{color:var(--text-2);flex-shrink:0;font-size:11.5px}.chat-item-preview{color:var(--text-1);white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.unread-badge{background:var(--grad);color:#fff;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:11px;font-weight:700;display:inline-flex;box-shadow:0 2px 8px #a855f773}.avatar{color:#fff;-webkit-user-select:none;user-select:none;text-shadow:0 1px 3px #00000059;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:inline-flex;position:relative}.avatar.group-avatar{border-radius:34%}.presence-dot{border:2.5px solid var(--bg-0);background:#4a4f6b;border-radius:50%;width:12px;height:12px;position:absolute;bottom:-1px;right:-1px}.presence-dot.online{background:var(--green);box-shadow:0 0 6px #2fd573e6}#chat-pane{flex-direction:column;flex:1;min-width:0;display:flex;position:relative}#chat-header{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:3;background:#0c0f1e73;align-items:center;gap:12px;padding:12px 18px;display:flex}.chat-header-info{flex:1;min-width:0}.chat-header-name{white-space:nowrap;text-overflow:ellipsis;font-size:15.5px;font-weight:700;overflow:hidden}.chat-header-sub{color:var(--text-1);font-size:12.5px}.back-btn{display:none}#messages{scroll-behavior:auto;flex-direction:column;flex:1;gap:3px;padding:18px 22px 8px;display:flex;overflow-y:auto}.day-sep{justify-content:center;margin:14px 0 10px;display:flex}.day-sep span{color:var(--text-1);background:var(--glass-strong);border:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:999px;padding:4px 14px;font-size:12px}.msg-row{align-items:flex-end;gap:8px;max-width:78%;animation:.18s ease-out msg-pop;display:flex}.msg-row.mine{flex-direction:row-reverse;align-self:flex-end}.msg-row.theirs{align-self:flex-start}.msg-bubble{background:var(--glass-strong);border:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px 16px 16px 6px;min-width:60px;padding:8px 13px 6px;position:relative;box-shadow:0 2px 10px #00000040}.msg-row.mine .msg-bubble{background:var(--grad);border:none;border-radius:16px 16px 6px;box-shadow:0 4px 16px #8b5cf659}.msg-sender{background:var(--grad);color:#0000;-webkit-background-clip:text;background-clip:text;margin-bottom:3px;font-size:12.5px;font-weight:700}.msg-row.mine .msg-sender{color:#ffffffd9;background:0 0}.msg-content{word-break:break-word;white-space:pre-wrap;min-width:0;font-size:14.5px;line-height:1.45}.msg-content img{cursor:zoom-in;border-radius:10px;max-width:min(280px,100%);height:auto;max-height:320px;display:block;box-shadow:0 2px 10px #00000059}.msg-caption{margin-top:6px;font-size:14px}.msg-meta{color:#ffffff8c;justify-content:flex-end;align-items:center;gap:5px;margin-top:3px;font-size:11px;display:flex}.msg-row.theirs .msg-meta{color:var(--text-2)}.msg-ticks{letter-spacing:-1px;color:#ffffffbf;font-size:12px;font-weight:700}.msg-row.theirs .msg-ticks{color:var(--text-2)}.msg-row.pending{opacity:.55}.msg-row.failed .msg-bubble{cursor:pointer;background:#f2545b40}.file-row{align-items:center;gap:10px;min-width:200px;display:flex}.file-icon{font-size:26px}.file-meta{flex:1;min-width:0}.file-name{white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;font-weight:600;overflow:hidden}.file-size{opacity:.7;font-size:12px}.file-dl{background:var(--glass);border-radius:8px;padding:6px 8px;font-size:18px;text-decoration:none;transition:background .15s}.file-dl:hover{background:var(--glass-hover)}#typing-bar{color:var(--accent-1);align-items:center;gap:8px;padding:4px 22px 2px;font-size:12.5px;font-weight:600;display:flex}.typing-dots{align-items:center;gap:3px;display:inline-flex}.typing-dots i{background:var(--accent-1);border-radius:50%;width:5px;height:5px;animation:1.2s infinite typing-bounce}.typing-dots i:nth-child(2){animation-delay:.15s}.typing-dots i:nth-child(3){animation-delay:.3s}#composer{border-top:1px solid var(--border);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#0c0f1e73;align-items:flex-end;gap:8px;padding:10px 16px 14px;display:flex;position:relative}#msg-input{resize:none;border-radius:20px;flex:1;max-height:160px;padding:11px 16px;line-height:1.4}.send-btn{background:var(--grad);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:42px;height:42px;font-size:16px;transition:transform .15s,box-shadow .15s;display:flex;box-shadow:0 3px 12px #8b5cf673}.send-btn:hover{transform:scale(1.08);box-shadow:0 4px 18px #8b5cf6a6}.send-btn:active{transform:scale(.94)}.icon-btn{width:40px;height:40px;color:var(--text-1);background:var(--glass);border:1px solid var(--border);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:17px;transition:background .15s,color .15s,transform .15s;display:inline-flex}.icon-btn:hover{background:var(--glass-hover);color:var(--text-0);transform:scale(1.06)}#upload-progress{background:var(--glass);border-radius:3px;height:6px;position:absolute;bottom:64px;left:16px;right:16px;overflow:hidden}#upload-bar{background:var(--grad);border-radius:3px;width:0%;height:100%;transition:width .2s}#empty-state{color:var(--text-1);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:10px;display:flex}.empty-logo{background:var(--grad);color:#0000;filter:drop-shadow(0 6px 24px #8b5cf680);-webkit-background-clip:text;background-clip:text;font-size:64px;animation:4s ease-in-out infinite float}#empty-state h1{color:var(--text-0);font-size:26px}#login-view{z-index:50;background:radial-gradient(800px 500px at 20% 10%, #6c5ce759, transparent 55%), radial-gradient(700px 500px at 90% 90%, #ec489940, transparent 55%), var(--bg-0);justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.login-card{border:1px solid var(--border);-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);background:#10142abf;border-radius:24px;width:min(400px,100vw - 32px);padding:36px 32px 30px;animation:.35s ease-out card-in;box-shadow:0 24px 80px #00000080}.login-logo{text-align:center;background:var(--grad);color:#0000;filter:drop-shadow(0 8px 28px #8b5cf68c);-webkit-background-clip:text;background-clip:text;font-size:52px}.login-card h1{text-align:center;letter-spacing:.5px;margin-top:6px;font-size:26px}.login-sub{text-align:center;color:var(--text-2);letter-spacing:.8px;margin-bottom:22px;font-size:13px}.login-tabs{background:var(--glass);border:1px solid var(--border);border-radius:12px;margin-bottom:18px;padding:4px;display:flex}.tab{color:var(--text-1);border-radius:9px;flex:1;padding:9px 0;font-size:13.5px;font-weight:600;transition:all .2s}.tab.active{background:var(--grad);color:#fff;box-shadow:0 2px 10px #8b5cf666}#login-form{flex-direction:column;gap:12px;display:flex}#login-submit{background:var(--grad);color:#fff;letter-spacing:.4px;border-radius:14px;margin-top:6px;padding:13px;font-size:15px;font-weight:700;transition:transform .15s,box-shadow .15s,filter .15s;box-shadow:0 6px 20px #8b5cf666}#login-submit:hover:not(:disabled){filter:brightness(1.08);transform:translateY(-1px)}#login-submit:disabled{opacity:.6;cursor:default}.login-error{color:var(--red);text-align:center;font-size:13px}#login-submit.shake{animation:.35s shake}.modal-overlay{z-index:60;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);opacity:0;background:#050710a6;justify-content:center;align-items:center;transition:opacity .2s;display:flex;position:fixed;inset:0}.modal-overlay.show{opacity:1}.modal-box{border:1px solid var(--border);background:#131730eb;border-radius:22px;width:min(440px,100vw - 32px);max-height:82vh;padding:26px;transition:transform .2s;overflow-y:auto;transform:translateY(12px)scale(.97);box-shadow:0 30px 90px #0009}.modal-overlay.show .modal-box{transform:none}.group-modal,.members-modal{flex-direction:column;gap:14px;display:flex}.group-modal h2,.members-modal h2{font-size:19px}.gm-search input,#mm-q{width:100%}#gm-results,#mm-results{flex-direction:column;gap:4px;max-height:180px;margin-top:8px;display:flex;overflow-y:auto}.gm-result{cursor:pointer;border-radius:12px;align-items:center;gap:10px;padding:8px 10px;font-size:14px;transition:background .13s;display:flex}.gm-result:hover{background:var(--glass-hover)}#gm-selected{flex-wrap:wrap;gap:8px;min-height:10px;display:flex}.gm-chip{cursor:pointer;background:#a855f738;border:1px solid #a855f766;border-radius:999px;align-items:center;gap:7px;padding:5px 12px 5px 5px;font-size:13px;transition:background .13s;display:inline-flex}.gm-chip:hover{background:#f2545b4d;border-color:#f2545b80}#gm-create{background:var(--grad);color:#fff;border-radius:14px;padding:12px;font-size:14.5px;font-weight:700;transition:filter .15s}#gm-create:hover:not(:disabled){filter:brightness(1.1)}#gm-create:disabled{opacity:.45;cursor:default}.mm-row{border-radius:12px;align-items:center;gap:10px;padding:8px 6px;display:flex}.mm-row:hover{background:var(--glass)}.mm-info{flex:1;min-width:0}.mm-name{font-size:14px;font-weight:600}.mm-sub{color:var(--text-2);font-size:12px}.mm-kick{color:var(--red);border:1px solid #f2545b66;border-radius:999px;padding:5px 12px;font-size:12px;transition:background .13s}.mm-kick:hover{background:#f2545b2e}#mm-toggle{background:var(--glass);border:1px dashed var(--border);color:var(--text-1);border-radius:13px;padding:11px;font-size:13.5px;transition:all .15s}#mm-toggle:hover{color:var(--text-0);border-color:var(--accent-1)}#lightbox{z-index:70;cursor:zoom-out;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#04060ee6;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}#lightbox img{border-radius:12px;max-width:92vw;max-height:92vh;box-shadow:0 20px 80px #000000b3}.lb-close{background:var(--glass-strong);width:42px;height:42px;color:var(--text-0);border-radius:50%;font-size:16px;transition:background .15s;position:absolute;top:18px;right:18px}.lb-close:hover{background:var(--glass-hover)}#toast-root{z-index:90;pointer-events:none;flex-direction:column;align-items:center;gap:8px;display:flex;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}.toast{border:1px solid var(--border);opacity:0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#181c3af2;border-radius:12px;max-width:min(420px,90vw);padding:10px 18px;font-size:13.5px;transition:all .25s;transform:translateY(10px);box-shadow:0 8px 30px #00000073}.toast.show{opacity:1;transform:none}.toast-error{color:#ffb3b6;border-color:#f2545b80}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#ffffff24;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff3d}::-webkit-scrollbar-track{background:0 0}@keyframes msg-pop{0%{opacity:0;transform:translateY(8px)scale(.98)}to{opacity:1;transform:none}}@keyframes typing-bounce{0%,60%,to{opacity:.5;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-5px)}80%{transform:translate(5px)}}@keyframes card-in{0%{opacity:0;transform:translateY(18px)scale(.96)}to{opacity:1;transform:none}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-9px)}}@media (width<=820px){#sidebar{width:100%;min-width:100%}#empty-state{display:none!important}#chat-pane{background:var(--bg-0);z-index:5;display:none;position:fixed;inset:0}#chat-pane:not(.hidden){display:flex}#sidebar:has(+#chat-pane.hidden){display:flex}.back-btn{display:inline-flex}}