@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{--font:"Inter", system-ui, sans-serif;--sidebar-bg:#171717;--sidebar-width:260px;--sidebar-item-hover:#2a2a2a;--sidebar-item-active:#333;--sidebar-text:#d1d5db;--sidebar-text-muted:#6b7280;--sidebar-border:#2a2a2a;--main-bg:#212121;--header-bg:#212121;--input-bg:#2f2f2f;--input-border:#404040;--input-border-focus:#6b7280;--user-bubble:#2f2f2f;--user-text:#f9fafb;--assistant-text:#e5e7eb;--accent:#10a37f;--accent-hover:#0d8f6f;--accent-light:#10a37f26;--text-primary:#f9fafb;--text-secondary:#9ca3af;--text-muted:#6b7280;--border:#303030;--shadow-sm:0 1px 3px #0006;--shadow-md:0 4px 12px #00000080;--code-bg:#1a1a2e;--code-text:#e2e8f0;font-family:var(--font);color:var(--text-primary);background:var(--main-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:15px;line-height:1.6}body{height:100vh;margin:0;overflow:hidden}#root{flex-direction:row;width:100%;height:100vh;display:flex;overflow:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#404040;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#555}pre{background:var(--code-bg);border:1px solid #2d2d3e;border-radius:8px;margin:12px 0;padding:16px;font-size:13.5px;line-height:1.6;overflow-x:auto}code{color:var(--code-text);background:#2a2a3e;border-radius:4px;padding:2px 6px;font-family:Fira Code,Cascadia Code,ui-monospace,Consolas,monospace;font-size:13.5px}pre code{background:0 0;padding:0}strong,b{color:var(--text-primary);font-weight:600}em,i{font-style:italic}p{margin:0 0 8px}p:last-child{margin-bottom:0}ul,ol{margin:6px 0 10px;padding-left:20px}li{margin:4px 0}h1,h2,h3,h4{color:var(--text-primary);margin:12px 0 6px;font-weight:600;line-height:1.3}h1{font-size:22px}h2{font-size:18px}h3{font-size:16px}h4{font-size:15px}.app-layout{background:var(--main-bg);width:100%;height:100vh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--sidebar-bg);border-right:1px solid var(--sidebar-border);flex-direction:column;height:100vh;display:flex;overflow:hidden}.sidebar-header{border-bottom:1px solid var(--sidebar-border);flex-direction:column;gap:6px;padding:14px 10px 10px;display:flex}.sidebar-brand{color:var(--text-primary);align-items:center;gap:9px;padding:4px 6px;display:flex}.sidebar-brand-icon{background:var(--accent);color:#fff;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;width:26px;height:26px;font-size:13px;font-weight:700;display:flex}.sidebar-brand-name{color:var(--text-primary);letter-spacing:-.2px;font-size:14px;font-weight:600}.new-chat-btn{border:1px solid var(--sidebar-border);color:var(--sidebar-text);cursor:pointer;font-size:13px;font-weight:500;font-family:var(--font);text-align:left;background:0 0;border-radius:7px;align-items:center;gap:8px;width:100%;padding:8px 10px;transition:background .15s,border-color .15s;display:flex}.new-chat-btn:hover{background:var(--sidebar-item-hover);border-color:#404040}.new-chat-btn svg{opacity:.7;flex-shrink:0}.sidebar-section-title{letter-spacing:.6px;text-transform:uppercase;color:var(--sidebar-text-muted);-webkit-user-select:none;user-select:none;padding:16px 16px 6px;font-size:11px;font-weight:600}.chat-history{flex:1;padding:4px 8px;overflow-y:auto}.chat-history-item{cursor:pointer;border-radius:8px;align-items:center;gap:10px;margin-bottom:2px;padding:8px 10px;transition:background .12s;display:flex;position:relative}.chat-history-item:hover{background:var(--sidebar-item-hover)}.chat-history-item.active{background:var(--sidebar-item-active)}.chat-history-item-icon{color:var(--sidebar-text-muted);opacity:.7;flex-shrink:0}.chat-history-item-content{flex:1;min-width:0}.chat-history-item-title{color:var(--sidebar-text);white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;line-height:1.4;overflow:hidden}.chat-history-item.active .chat-history-item-title{color:var(--text-primary)}.chat-history-item-time{color:var(--sidebar-text-muted);margin-top:1px;font-size:11px}.sidebar-footer{border-top:1px solid var(--sidebar-border);padding:12px}.user-profile{cursor:pointer;border-radius:8px;align-items:center;gap:10px;padding:9px 10px;transition:background .15s;display:flex}.user-profile:hover{background:var(--sidebar-item-hover)}.user-avatar{background:linear-gradient(135deg, var(--accent), #8b5cf6);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;font-size:12px;font-weight:600;display:flex}.user-info{flex:1;min-width:0}.user-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;font-weight:500;overflow:hidden}.user-plan{color:var(--sidebar-text-muted);font-size:11px}.user-email{color:var(--sidebar-text-muted);white-space:nowrap;text-overflow:ellipsis;margin-top:1px;font-size:11px;overflow:hidden}.logout-btn{color:var(--sidebar-text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;transition:color .15s;display:flex}.logout-btn:hover{color:#ef4444}.main-area{background:var(--main-bg);flex-direction:column;flex:1;min-width:0;height:100vh;display:flex;overflow:hidden}.topbar{border-bottom:1px solid var(--border);background:var(--header-bg);flex-shrink:0;justify-content:space-between;align-items:center;gap:16px;min-height:54px;padding:11px 40px;display:flex}.topbar-left{align-items:center;gap:12px;display:flex}.model-badge{border:1px solid var(--border);color:var(--text-primary);cursor:default;-webkit-user-select:none;user-select:none;background:#2a2a2a;border-radius:20px;align-items:center;gap:6px;padding:5px 12px;font-size:13px;font-weight:500;display:flex}.model-badge-dot{background:var(--accent);width:7px;height:7px;box-shadow:0 0 6px var(--accent);border-radius:50%;flex-shrink:0}.login-screen{background:var(--main-bg);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:40px;padding:40px 20px;display:flex}.login-hero{flex-direction:column;align-items:center;gap:16px;display:flex}.login-hero-icon{background:linear-gradient(135deg, var(--accent), #6366f1);color:#fff;border-radius:16px;justify-content:center;align-items:center;width:60px;height:60px;font-size:28px;font-weight:700;display:flex;box-shadow:0 8px 24px #10a37f4d}.login-title{color:var(--text-primary);letter-spacing:-.5px;text-align:center;margin:0;font-size:32px;font-weight:600}.login-subtitle{color:var(--text-muted);text-align:center;max-width:340px;font-size:15px;line-height:1.5}.login-card{border:1px solid var(--border);min-width:340px;box-shadow:var(--shadow-md);background:#2a2a2a;border-radius:16px;flex-direction:column;align-items:center;gap:20px;padding:32px 40px;display:flex}.login-card-title{color:var(--text-secondary);font-size:16px;font-weight:500}.login-btn{background:var(--accent);color:#fff;font-size:14.5px;font-weight:600;font-family:var(--font);cursor:pointer;border:none;border-radius:10px;align-items:center;gap:10px;padding:12px 28px;text-decoration:none;transition:background .15s,transform .1s,box-shadow .15s;display:inline-flex;box-shadow:0 4px 14px #10a37f59}.login-btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 20px #10a37f73}.login-btn:active{transform:translateY(0)}.chat-area{flex-direction:column;flex:1;display:flex;overflow:hidden}.messages-container{flex-direction:column;flex:1;padding:20px 0 8px;display:flex;overflow-y:auto}.messages-inner{flex-direction:column;gap:4px;width:100%;max-width:860px;margin:0 auto;padding:0 40px;display:flex}.empty-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:18px;padding:60px 40px;display:flex}.empty-state-icon{background:linear-gradient(135deg, var(--accent), #6366f1);color:#fff;border-radius:16px;justify-content:center;align-items:center;width:56px;height:56px;font-size:26px;display:flex;box-shadow:0 8px 28px #10a37f4d}.empty-state-title{color:var(--text-primary);letter-spacing:-.4px;font-size:26px;font-weight:600}.empty-state-sub{color:var(--text-muted);max-width:420px;font-size:14px;line-height:1.7}.suggestions{flex-wrap:wrap;justify-content:center;gap:8px;max-width:640px;margin-top:6px;display:flex}.suggestion-chip{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;font-size:13px;font-family:var(--font);background:#2a2a2a;border-radius:20px;padding:9px 16px;transition:background .15s,border-color .15s,color .15s}.suggestion-chip:hover{color:var(--text-primary);background:#333;border-color:#4a4a4a}.message-row{flex-direction:column;padding:16px 0;animation:.18s msgIn;display:flex}.message-row+.message-row.assistant{padding-top:20px}.message-row.user{align-items:flex-end}.message-row.assistant{align-items:flex-start}@keyframes msgIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.message-sender-label{letter-spacing:.5px;text-transform:uppercase;color:var(--text-muted);margin-bottom:8px;padding:0 2px;font-size:11px;font-weight:600}.message-row.user .message-sender-label{text-align:right}.message-bubble{word-break:break-word;font-size:14.5px;line-height:1.75}.message-row.user .message-bubble{background:var(--accent);color:#fff;border-radius:18px 18px 5px;max-width:68%;padding:11px 17px}.message-row.assistant .message-bubble{color:var(--assistant-text);background:0 0;border:none;width:100%;max-width:100%;padding:0}.typing-indicator{align-items:center;gap:5px;padding:6px 0;display:flex}.typing-dot{background:var(--text-muted);border-radius:50%;width:7px;height:7px;animation:1.3s infinite typingPulse}.typing-dot:nth-child(2){animation-delay:.18s}.typing-dot:nth-child(3){animation-delay:.36s}@keyframes typingPulse{0%,60%,to{opacity:.25;transform:scale(1)}30%{opacity:1;transform:scale(1.25)}}.md-p{color:var(--assistant-text);margin:0 0 12px;font-size:14.5px;line-height:1.8}.md-p:last-child{margin-bottom:0}.md-h1{color:var(--text-primary);letter-spacing:-.2px;margin:20px 0 8px;font-size:19px;font-weight:600}.md-h2{color:var(--text-primary);margin:18px 0 6px;font-size:16.5px;font-weight:600}.md-h3{color:var(--text-primary);margin:14px 0 5px;font-size:14.5px;font-weight:600}.md-ul,.md-ol{color:var(--assistant-text);margin:4px 0 12px;padding-left:24px;font-size:14.5px;line-height:1.8}.md-ul li,.md-ol li{margin:5px 0}.md-ul{list-style-type:disc}.md-ol{list-style-type:decimal}.md-code-block{background:#1a1a2e;border:1px solid #2d2d3e;border-radius:10px;margin:10px 0 14px;overflow:hidden}.md-code-lang{font-size:11px;font-family:var(--font);text-transform:uppercase;letter-spacing:.6px;color:#6b7280;background:#111126;border-bottom:1px solid #2d2d3e;padding:8px 16px;font-weight:600}.md-code-block pre{background:0 0;border:none;border-radius:0;margin:0;padding:14px 16px}.input-area{background:var(--main-bg);flex-shrink:0;padding:0 40px 24px}.input-area-inner{max-width:860px;margin:0 auto}.input-wrapper{background:#2c2c2c;border:1px solid #ffffff17;border-radius:16px;align-items:flex-end;gap:10px;padding:12px 12px 12px 18px;transition:border-color .2s,box-shadow .2s;display:flex;box-shadow:0 4px 20px #0006}.input-wrapper:focus-within{border-color:#fff3;box-shadow:0 4px 24px #00000080}.message-input{resize:none;font-size:15px;font-family:var(--font);color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;min-height:24px;max-height:200px;padding:0;line-height:1.65;overflow-y:auto}.message-input::placeholder{color:#555}.send-btn{cursor:pointer;background:var(--accent);border:none;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;transition:background .15s,transform .12s,opacity .15s;display:flex;box-shadow:0 2px 8px #10a37f59}.send-btn:disabled{box-shadow:none;cursor:default;background:#383838}.send-btn:not(:disabled):hover{background:var(--accent-hover);transform:scale(1.06)}.send-btn:not(:disabled):active{transform:scale(.94)}.send-btn svg{color:#fff}.send-btn:disabled svg{color:#555}.error-banner{background:#ef44441a;border:1px solid #ef444440;border-radius:10px;align-items:center;gap:10px;width:calc(100% - 80px);max-width:860px;margin:0 auto 10px;padding:11px 16px;display:flex}.error-banner-text{color:#fca5a5;flex:1;font-size:13.5px;line-height:1.5}.error-dismiss{color:#f87171;cursor:pointer;font-size:18px;font-family:var(--font);background:0 0;border:none;flex-shrink:0;align-items:center;padding:0 2px;transition:color .15s;display:flex}.error-dismiss:hover{color:#ef4444}.login-full{background:var(--main-bg);flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}