@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap";*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f0f2f7;--bg2: #ffffff;--bg3: #f5f6fa;--bg4: #eceef5;--border: #dde0ea;--border2: #c8ccd8;--text: #0d1117;--text2: #4a5068;--text3: #8b90a7;--accent: #7c5cbf;--accent2: #5a3fa0;--accent-h: rgba(124,92,191,.08);--accent-b: rgba(124,92,191,.25);--radius: 12px;--sidebar: 260px}html,body,#root{height:100%;font-family:Inter,system-ui,sans-serif}body{background:var(--bg);color:var(--text);overflow:hidden}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px}.auth-root{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f0f2f7;position:relative;overflow:hidden}.auth-root:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 60% 50% at 50% 0%,rgba(100,80,200,.18) 0%,transparent 70%),radial-gradient(ellipse 40% 40% at 80% 80%,rgba(80,60,160,.12) 0%,transparent 60%);pointer-events:none}.auth-card{background:#fff;border:1px solid #dde0ea;border-radius:20px;padding:40px 36px;width:100%;max-width:420px;position:relative;z-index:1;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.auth-logo{display:flex;flex-direction:column;align-items:center;gap:6px;margin-bottom:28px}.auth-logo-icon{width:52px;height:52px;background:#3a3170;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:600;color:#a89de8}.auth-logo-name{font-size:20px;font-weight:500;color:#0d1117;margin-top:2px}.auth-logo-sub{font-size:13px;color:#4a5068}.auth-oauth{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}.oauth-btn{display:flex;align-items:center;gap:12px;padding:12px 18px;background:#fff;border:1px solid #e0e0e0;border-radius:50px;color:#111;font-size:14px;cursor:pointer;transition:box-shadow .15s,transform .1s;font-family:Inter,sans-serif}.oauth-btn:hover{box-shadow:0 2px 12px #0000001f;transform:translateY(-1px)}.oauth-icon{width:18px;height:18px;flex-shrink:0}.auth-divider{display:flex;align-items:center;gap:12px;margin:6px 0 16px;color:#8b90a7;font-size:12px}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:#dde0ea}.field{margin-bottom:14px}.field label{display:block;font-size:12px;color:#4a5068;margin-bottom:5px}.field input{width:100%;padding:11px 14px;background:#f5f6fa;border:1.5px solid #c8ccd8;border-radius:10px;color:#0d1117;font-size:14px;font-family:Inter,sans-serif;outline:none;transition:border-color .15s,box-shadow .15s}.field input:focus{border-color:#9178d8;box-shadow:0 0 0 3px #7c5cbf2e;background:#fff}.field input::placeholder{color:#8b90a7}.field-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.checkbox-label{display:flex;align-items:center;gap:8px;font-size:13px;color:#4a5068;cursor:pointer}.checkbox-label input[type=checkbox]{width:14px;height:14px;accent-color:#7c5cbf;cursor:pointer}.forgot-link{font-size:13px;color:#7c5cbf;text-decoration:none}.forgot-link:hover{text-decoration:underline}.btn-primary{width:100%;padding:13px;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);border:none;border-radius:50px;color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:opacity .15s,transform .1s;font-family:Inter,sans-serif}.btn-primary:hover{opacity:.92}.btn-primary:active{transform:scale(.98)}.auth-footer{text-align:center;margin-top:18px;font-size:13px;color:#4a5068}.auth-footer a{color:#7c5cbf;text-decoration:none}.auth-footer a:hover{text-decoration:underline}.error-msg{background:#dc32321f;border:1px solid rgba(220,50,50,.3);color:#f87171;border-radius:8px;padding:10px 14px;font-size:13px;margin-bottom:14px}.success-msg{background:#22c55e1a;border:1px solid rgba(34,197,94,.3);color:#4ade80;border-radius:8px;padding:10px 14px;font-size:13px;margin-bottom:14px}.chat-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar);min-width:var(--sidebar);background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;transition:width .2s,min-width .2s}.sidebar.collapsed{width:0;min-width:0;border:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 12px;border-bottom:1px solid var(--border)}.sidebar-brand{display:flex;align-items:center;gap:8px}.sidebar-logo{width:28px;height:28px;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:#fff}.sidebar-title{font-size:14px;font-weight:600;color:var(--text)}.icon-btn{width:28px;height:28px;border:none;background:transparent;color:var(--text3);border-radius:7px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .12s,color .12s}.icon-btn:hover{background:var(--bg3);color:var(--text)}.sidebar-new-chat{margin:10px 10px 4px}.new-chat-btn{display:flex;align-items:center;gap:8px;width:100%;padding:9px 12px;background:transparent;border:1px solid var(--border2);border-radius:9px;color:var(--text2);font-size:13px;cursor:pointer;transition:all 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.12s}.user-chip:hover{background:var(--bg3)}.user-avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:#fff;flex-shrink:0}.user-name{font-size:13px;font-weight:500;color:var(--text)}.user-plan{font-size:11px;color:var(--text3)}.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.chat-topbar{display:flex;align-items:center;justify-content:space-between;padding:11px 20px;background:var(--bg2);border-bottom:1px solid var(--border);z-index:10}.topbar-left{display:flex;align-items:center;gap:10px}.topbar-brand{font-size:14px;font-weight:600;color:var(--text)}.topbar-right{display:flex;align-items:center;gap:8px}.btn-outline{padding:7px 16px;background:transparent;border:1px solid var(--border2);border-radius:8px;color:var(--text2);font-size:13px;cursor:pointer;transition:all .12s;font-family:Inter,sans-serif}.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-h)}.btn-accent-sm{padding:7px 16px;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);border:none;border-radius:8px;color:#fff;font-size:13px;font-weight:500;cursor:pointer;transition:opacity .12s;font-family:Inter,sans-serif}.btn-accent-sm:hover{opacity:.88}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column}.chat-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding-bottom:80px}.chat-empty-title{font-size:26px;font-weight:500;color:var(--text)}.chat-empty-sub{font-size:14px;color:var(--text2)}.suggestion-chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:500px;margin-top:14px}.chip{padding:8px 16px;background:var(--bg2);border:1px solid var(--border);border-radius:20px;font-size:13px;color:var(--text2);cursor:pointer;transition:all .12s;font-family:Inter,sans-serif}.chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-h)}.message{display:flex;gap:10px;padding:12px 0;max-width:760px;margin:0 auto;width:100%}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.msg-avatar{width:28px;height:28px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;margin-top:2px}.msg-avatar.ai{background:linear-gradient(135deg,#7c5cbf,#5a3fa0);color:#fff}.msg-avatar.user{background:var(--bg4);color:var(--text2);border:1px solid var(--border)}.msg-body{max-width:78%}.msg-bubble{padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.65;color:var(--text)}.message.user .msg-bubble{background:linear-gradient(135deg,#7c5cbf,#5a3fa0);color:#fff;border-radius:14px 14px 4px}.message.assistant .msg-bubble{background:var(--bg2);border:1px solid var(--border);border-radius:14px 14px 14px 4px}.chat-input-area{padding:14px 20px 18px;background:var(--bg2);border-top:1px solid var(--border)}.chat-input-wrap{max-width:760px;margin:0 auto}.chat-input-box{display:flex;align-items:flex-end;gap:8px;background:var(--bg);border:1.5px solid var(--border);border-radius:14px;padding:10px 12px;transition:border-color .15s,box-shadow .15s}.chat-input-box:focus-within{border-color:#9178d8;box-shadow:0 0 0 3px #7c5cbf1a}.chat-add-btn{width:26px;height:26px;border:1px solid var(--border2);background:transparent;border-radius:7px;color:var(--text3);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .12s;flex-shrink:0}.chat-add-btn:hover{background:var(--bg3);color:var(--text)}.chat-textarea{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:14px;font-family:Inter,sans-serif;line-height:1.5;resize:none;min-height:22px;max-height:160px}.chat-textarea::placeholder{color:var(--text3)}.chat-send-btn{width:32px;height:32px;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);border:none;border-radius:9px;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:opacity .12s,transform .1s;flex-shrink:0}.chat-send-btn:hover{opacity:.85}.chat-send-btn:active{transform:scale(.93)}.chat-send-btn:disabled{background:var(--bg4);cursor:not-allowed}.chat-footer-note{text-align:center;font-size:11px;color:var(--text3);margin-top:8px}@keyframes blink{0%,to{opacity:.2}50%{opacity:1}}.typing-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--text3);animation:blink 1.2s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}.typing-dots{display:flex;gap:4px;align-items:center;padding:2px 0}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.fade-up{animation:fadeUp .28s ease}.unauth-banner{background:var(--accent-h);border:1px solid var(--accent-b);border-radius:10px;padding:14px;margin-bottom:8px}.unauth-banner h3{font-size:13px;font-weight:600;color:var(--accent);margin-bottom:4px}.unauth-banner p{font-size:12px;color:var(--text2);margin-bottom:10px;line-height:1.5}.unauth-banner .btn-primary{width:auto;padding:7px 18px;font-size:13px;border-radius:8px}.profile-field{margin-bottom:12px}.profile-field label{font-size:12px;color:var(--text2);margin-bottom:5px;display:block}.profile-field input{width:100%;padding:10px 13px;background:var(--bg3);border:1px solid var(--border2);border-radius:9px;color:var(--text);font-size:14px;font-family:Inter,sans-serif;outline:none;transition:border-color .12s}.profile-field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-h)}.profile-save-btn{padding:9px 24px;background:linear-gradient(135deg,#7c5cbf,#5a3fa0);border:none;border-radius:9px;color:#fff;font-size:14px;font-weight:500;cursor:pointer;transition:opacity .12s;font-family:Inter,sans-serif;margin-top:6px}.profile-save-btn:hover{opacity:.88}