*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--accent:#7c3aed;--accent-light:#a78bfa;--accent-hover:#6d28d9;--bg:#0a0a0a;--bg-2:#111;--bg-3:#1a1a1a;--bg-4:#222;--border:#262626;--border-light:#303030;--text:#f0f0f0;--text-2:#a0a0a0;--text-3:#606060;--success:#34d399;--error:#f87171;--radius:12px;--radius-sm:8px;--sidebar-width:268px}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow:hidden}button,input,textarea{font:inherit}.auth-page{background:var(--bg);background-image:radial-gradient(80% 50% at 50% -20%,#7c3aed26,#0000);place-items:center;min-height:100vh;display:grid}.auth-card{background:var(--bg-2);border:1px solid var(--border);border-radius:20px;width:420px;padding:44px 40px;box-shadow:0 24px 80px #00000080}.auth-brand{align-items:center;gap:10px;margin-bottom:32px;display:flex}.auth-brand-icon{background:linear-gradient(135deg, var(--accent), var(--accent-light));border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;display:flex}.auth-brand-name{color:var(--text);letter-spacing:-.3px;font-size:17px;font-weight:700}.auth-card h1{color:var(--text);letter-spacing:-.5px;margin-bottom:6px;font-size:24px;font-weight:700}.auth-card p{color:var(--text-2);margin-bottom:28px;font-size:14px}.input-group{margin-bottom:14px}.input-label{color:var(--text-2);letter-spacing:.02em;margin-bottom:6px;font-size:12px;font-weight:500;display:block}.auth-card input{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text);outline:none;padding:11px 14px;font-size:14px;transition:border-color .15s,box-shadow .15s;display:block}.auth-card input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c3aed1f}.auth-card input::placeholder{color:var(--text-3)}.auth-submit{border-radius:var(--radius-sm);cursor:pointer;background:linear-gradient(135deg, var(--accent), #9333ea);color:#fff;letter-spacing:.01em;border:none;width:100%;margin-top:20px;padding:12px;font-size:14px;font-weight:600;transition:opacity .2s,transform .1s;display:block}.auth-submit:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.auth-submit:active{transform:translateY(0)}.auth-submit:disabled{opacity:.5;cursor:not-allowed;transform:none}.auth-divider{align-items:center;gap:12px;margin:20px 0;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--border);flex:1;height:1px}.auth-divider span{color:var(--text-3);font-size:12px}.auth-secondary{border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;width:100%;color:var(--text-2);background:0 0;padding:11px;font-size:14px;font-weight:500;transition:background .15s,color .15s,border-color .15s;display:block}.auth-secondary:hover{background:var(--bg-3);color:var(--text);border-color:var(--border-light)}.error{color:var(--error);border-radius:var(--radius-sm);background:#f8717114;border:1px solid #f8717133;align-items:center;gap:6px;margin-top:12px;padding:10px 12px;font-size:13px;display:flex}.app{height:100vh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--bg-2);border-right:1px solid var(--border);flex-direction:column;padding:14px 10px;display:flex;overflow:hidden}.sidebar-header{border-bottom:1px solid var(--border);align-items:center;gap:10px;margin-bottom:8px;padding:6px 6px 14px;display:flex}.sidebar-logo-box{background:linear-gradient(135deg, var(--accent), var(--accent-light));border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;font-size:14px;display:flex}.sidebar-title{color:var(--text);letter-spacing:-.2px;font-size:14px;font-weight:700}.new-chat-btn{border-radius:var(--radius-sm);width:100%;color:var(--accent-light);cursor:pointer;letter-spacing:.01em;background:#7c3aed1a;border:1px solid #7c3aed40;align-items:center;gap:8px;margin:10px 0 14px;padding:9px 12px;font-size:13px;font-weight:600;transition:all .15s;display:flex}.new-chat-btn:hover{background:#7c3aed2e;border-color:#7c3aed66}.new-chat-plus{background:var(--accent);color:#fff;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;font-size:14px;display:flex}.sidebar-nav{scrollbar-width:thin;scrollbar-color:var(--border) transparent;flex:1;overflow-y:auto}.nav-section-label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-3);margin-top:4px;padding:0 8px 6px;font-size:10px;font-weight:600}.nav-item{width:100%;color:var(--text-2);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:7px;align-items:center;gap:9px;margin-bottom:1px;padding:8px 10px;font-size:13px;line-height:1.4;transition:all .12s;display:flex}.nav-item:hover{background:var(--bg-3);color:var(--text)}.nav-item.active{color:var(--accent-light);background:#7c3aed1f;border:1px solid #7c3aed33}.nav-item-dot{background:var(--text-3);border-radius:50%;flex-shrink:0;width:6px;height:6px;transition:background .12s}.nav-item.active .nav-item-dot{background:var(--accent-light)}.nav-item:hover .nav-item-dot{background:var(--text-2)}.nav-item-text{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.sidebar-footer{border-top:1px solid var(--border);flex-direction:column;gap:2px;margin-top:6px;padding-top:10px;display:flex}.footer-btn{width:100%;color:var(--text-3);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:7px;align-items:center;gap:9px;padding:8px 10px;font-size:13px;transition:all .12s;display:flex}.footer-btn:hover{background:var(--bg-3);color:var(--text-2)}.footer-btn.active{color:var(--accent-light)}.footer-icon{text-align:center;flex-shrink:0;width:18px;font-size:15px}.main-content{background:var(--bg);flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-container{flex-direction:column;height:100vh;display:flex;overflow:hidden}.messages-area{scrollbar-width:thin;scrollbar-color:var(--border) transparent;flex:1;padding:32px 0 16px;overflow-y:auto}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:70vh;padding:40px 24px;display:flex}.empty-logo{background:linear-gradient(135deg, var(--accent), var(--accent-light));border-radius:16px;justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:20px;font-size:24px;display:flex;box-shadow:0 8px 32px #7c3aed4d}.empty-state h2{color:var(--text);letter-spacing:-.5px;margin-bottom:10px;font-size:26px;font-weight:700}.empty-state p{color:var(--text-2);max-width:380px;margin-bottom:32px;font-size:14px;line-height:1.65}.suggestions{flex-wrap:wrap;justify-content:center;gap:8px;max-width:540px;display:flex}.suggestion{background:var(--bg-2);border:1px solid var(--border);color:var(--text-2);cursor:pointer;border-radius:20px;padding:9px 16px;font-size:13px;line-height:1;transition:all .15s}.suggestion:hover{background:var(--bg-3);border-color:var(--border-light);color:var(--text)}.message-row{gap:14px;width:100%;max-width:860px;margin:0 auto;padding:10px 48px;animation:.2s fadeIn;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.message-row.user{flex-direction:row-reverse}.message-avatar{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;margin-top:4px;font-size:12px;font-weight:700;display:flex}.message-row.user .message-avatar{background:linear-gradient(135deg, var(--accent), #9333ea);color:#fff}.message-row.assistant .message-avatar{background:var(--bg-3);color:var(--accent-light);border:1px solid var(--border-light);font-size:14px}.message-bubble{flex:1;min-width:0}.message-role{color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;margin-bottom:5px;font-size:11px;font-weight:600}.message-row.user .message-role{text-align:right}.message-content{color:var(--text);white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.75}.message-row.user .message-content{background:var(--bg-3);border:1px solid var(--border-light);text-align:left;border-radius:14px 3px 14px 14px;padding:12px 16px;display:inline-block}.message-row.assistant .message-content{background:0 0;padding:2px 0}.typing-indicator{align-items:center;gap:5px;padding:10px 0 4px;display:flex}.typing-indicator span{background:var(--accent-light);opacity:.4;border-radius:50%;width:7px;height:7px;animation:1.4s ease-in-out infinite pulse}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1.1)}}.input-area{width:100%;max-width:860px;margin:0 auto;padding:12px 48px 18px}.input-form{background:var(--bg-2);border:1px solid var(--border-light);border-radius:14px;align-items:flex-end;gap:10px;padding:12px 14px 12px 16px;transition:border-color .15s,box-shadow .15s;display:flex;box-shadow:0 2px 16px #0000004d}.input-form:focus-within{border-color:#7c3aed80;box-shadow:0 2px 16px #0000004d,0 0 0 3px #7c3aed14}.input-box{color:var(--text);resize:none;scrollbar-width:thin;background:0 0;border:none;outline:none;flex:1;max-height:180px;font-size:14px;line-height:1.6;overflow-y:auto}.input-box::placeholder{color:var(--text-3)}.send-btn{background:linear-gradient(135deg, var(--accent), #9333ea);color:#fff;cursor:pointer;border:none;border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;transition:all .15s;display:flex;box-shadow:0 2px 8px #7c3aed66}.send-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #7c3aed80}.send-btn:active{transform:translateY(0)}.send-btn:disabled{background:var(--bg-4);color:var(--text-3);cursor:not-allowed;box-shadow:none}.input-footer{justify-content:space-between;align-items:center;margin-top:7px;padding:0 2px;display:flex}.input-hint,.input-shortcut{color:var(--text-3);font-size:11px}.account{max-width:520px;margin:56px auto;padding:0 24px}.account-header{margin-bottom:32px}.account-header h2{color:var(--text);letter-spacing:-.4px;margin-bottom:4px;font-size:22px;font-weight:700}.account-header p{color:var(--text-2);font-size:13px}.account-card{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius);padding:28px}.account label{color:var(--text-2);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;font-size:12px;font-weight:500;display:block}.account input{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text);outline:none;margin-bottom:20px;padding:11px 14px;font-size:14px;transition:border-color .15s,box-shadow .15s;display:block}.account input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c3aed1a}.account input:disabled{color:var(--text-3);cursor:not-allowed;background:var(--bg-2)}.account-save-btn{background:linear-gradient(135deg, var(--accent), #9333ea);border-radius:var(--radius-sm);color:#fff;cursor:pointer;border:none;padding:10px 22px;font-size:13px;font-weight:600;transition:all .15s;box-shadow:0 2px 8px #7c3aed4d}.account-save-btn:hover{opacity:.9;transform:translateY(-1px)}.account-success{color:var(--success);align-items:center;gap:6px;margin-top:14px;font-size:13px;display:inline-flex}