.landing{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:0 24px}.hero{text-align:center;padding:80px 0 60px}.hero-badge{background:var(--accent-light);color:var(--bg-primary);letter-spacing:.5px;border-radius:20px;margin-bottom:24px;padding:6px 16px;font-size:13px;font-weight:600;display:inline-block}.hero-title{letter-spacing:-1.5px;color:var(--text-primary);margin-bottom:20px;font-size:56px;font-weight:700;line-height:1.1}.gradient-text{background:linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 50%, var(--success) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:var(--text-secondary);max-width:640px;margin:0 auto 36px;font-size:18px;line-height:1.7}.hero-actions{justify-content:center;gap:16px;display:flex}.btn-large{border-radius:var(--radius);padding:14px 32px;font-size:16px}.features{padding:60px 0}.features-title{text-align:center;letter-spacing:-.5px;margin-bottom:48px;font-size:32px;font-weight:700}.features-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:border-color .2s,transform .2s}.feature-card:hover{border-color:var(--accent);transform:translateY(-2px)}.feature-icon{margin-bottom:16px;font-size:32px;display:block}.feature-name{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:600}.feature-desc{color:var(--text-secondary);font-size:14px;line-height:1.6}.cta{text-align:center;padding:60px 0 80px}.cta-title{margin-bottom:12px;font-size:32px;font-weight:700}.cta-subtitle{color:var(--text-secondary);margin-bottom:28px;font-size:16px}@media (width<=768px){.hero-title{font-size:36px}.features-grid{grid-template-columns:1fr}.hero{padding:48px 0 40px}}.chat{flex-direction:column;flex:1;min-width:0;height:calc(100vh - 64px);display:flex}.chat-messages{flex-direction:column;flex:1;gap:16px;width:100%;max-width:860px;margin:0 auto;padding:24px 16px;display:flex;overflow-y:auto}.chat-empty{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;padding:40px 20px;display:flex}.chat-empty-icon{font-size:48px}.chat-empty h2{color:var(--text-primary);font-size:24px;font-weight:600}.chat-empty p{color:var(--text-secondary);max-width:400px;font-size:15px}.chat-suggestions{flex-wrap:wrap;justify-content:center;gap:8px;max-width:560px;margin-top:16px;display:flex}.suggestion-chip{background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;border-radius:20px;padding:8px 16px;font-family:inherit;font-size:13px;transition:all .2s}.suggestion-chip:hover{border-color:var(--accent);color:var(--accent-light)}.message{gap:12px;max-width:80%;animation:.2s fadeIn;display:flex}.message-user{flex-direction:row-reverse;align-self:flex-end}.message-assistant{align-self:flex-start}.message-avatar{background:var(--bg-card);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;display:flex}.message-bubble{border-radius:var(--radius);padding:12px 16px;font-size:14px;line-height:1.6}.message-user .message-bubble{background:var(--user-bubble);color:#fff;border-bottom-right-radius:4px}.message-assistant .message-bubble{background:var(--agent-bubble);color:var(--text-primary);border:1px solid var(--border);border-bottom-left-radius:4px}.message-content{white-space:pre-wrap;word-break:break-word}.message-assistant .message-content p{margin:0 0 8px}.message-assistant .message-content p:last-child{margin-bottom:0}.message-assistant .message-content h1,.message-assistant .message-content h2,.message-assistant .message-content h3{margin:12px 0 6px;line-height:1.3}.message-assistant 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0;border:none;align-items:center;gap:10px;display:flex}.logo-icon{font-size:24px}.logo-text{letter-spacing:-.5px;font-size:20px;font-weight:700}.header-nav{align-items:center;gap:12px;display:flex}.nav-link{color:var(--text-secondary);font-size:14px;font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover{color:var(--text-primary)}.nav-divider{background:var(--border);width:1px;height:20px}.btn{border-radius:var(--radius-sm);cursor:pointer;border:none;padding:8px 20px;font-family:inherit;font-size:14px;font-weight:500;transition:all .2s}.btn-ghost{color:var(--text-secondary);border:1px solid var(--border);background:0 0}.btn-ghost:hover{color:var(--text-primary);border-color:var(--text-muted)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;width:260px;min-width:260px;height:calc(100vh - 64px);display:flex}.sidebar-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px;display:flex}.sidebar-header h3{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin:0;font-size:14px;font-weight:600}.new-chat-btn{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;background:0 0;justify-content:center;align-items:center;padding:4px;transition:all .2s;display:flex}.new-chat-btn:hover{border-color:var(--accent);color:var(--accent-light)}.sidebar-list{flex:1;padding:8px;overflow-y:auto}.sidebar-empty{text-align:center;color:var(--text-muted);padding:24px 16px;font-size:13px}.sidebar-item{border-radius:var(--radius-sm);cursor:pointer;text-align:left;background:0 0;border:none;flex-direction:column;align-items:flex-start;gap:2px;width:100%;padding:10px 12px;font-family:inherit;transition:background .15s;display:flex}.sidebar-item:hover{background:var(--bg-card)}.sidebar-item.active{background:var(--bg-card);border:1px solid var(--border)}.sidebar-item-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:100%;font-size:13px;overflow:hidden}.sidebar-item-date{color:var(--text-muted);font-size:11px}@media (width<=768px){.sidebar{display:none}}.app{flex-direction:column;min-height:100vh;display:flex}.app-chat-layout{flex:1;display:flex;overflow:hidden}:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-card:#1a1a2e;--bg-input:#16162a;--text-primary:#e8e8f0;--text-secondary:#8888a8;--text-muted:#5a5a78;--accent:#6c5ce7;--accent-light:#a29bfe;--accent-hover:#7c6cf7;--border:#2a2a3e;--success:#00cec9;--user-bubble:#6c5ce7;--agent-bubble:#1e1e32;--shadow:0 4px 24px #0000004d;--radius:12px;--radius-sm:8px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif}#root{flex-direction:column;min-height:100vh;display:flex}