:root{--bg: #0b0d10;--surface: #111419;--surface-2: #181c23;--border: #232830;--text: #e6e8ec;--text-secondary: #8b92a5;--accent: #3b82f6;--accent-2: #22d3ee;--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--radius: 12px;--shadow: 0 4px 24px rgba(0,0,0,.35)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}header{padding:48px 24px 32px;text-align:center;background:linear-gradient(180deg,rgba(59,130,246,.08) 0%,transparent 100%);border-bottom:1px solid var(--border)}header h1{font-size:2.25rem;font-weight:700;letter-spacing:-.025em;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}header p{margin-top:8px;color:var(--text-secondary);font-size:1.05rem;max-width:560px;margin-inline:auto}.meta{display:inline-flex;align-items:center;gap:8px;margin-top:20px;padding:8px 16px;background:var(--surface);border:1px solid var(--border);border-radius:999px;font-size:.85rem;color:var(--text-secondary)}.meta .dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 8px var(--success);animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.container{max-width:1100px;margin:0 auto;padding:32px 24px 64px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .2s,border-color .2s,box-shadow .2s;position:relative;overflow:hidden}.card:hover{transform:translateY(-2px);border-color:#3b82f659;box-shadow:var(--shadow)}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:0;transition:opacity .2s}.card:hover:before{opacity:1}.card-header{display:flex;align-items:center;gap:14px;margin-bottom:16px}.icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}.card-header h2{font-size:1.15rem;font-weight:600;color:var(--text)}.card-header span{display:block;font-size:.8rem;color:var(--text-secondary);font-weight:400;margin-top:2px}.card p{color:var(--text-secondary);font-size:.92rem;margin-bottom:16px}ul.checklist{list-style:none;display:flex;flex-direction:column;gap:10px}ul.checklist li{display:flex;align-items:flex-start;gap:10px;font-size:.88rem;color:#b0b6c4}ul.checklist li:before{content:"";width:16px;height:16px;border:2px solid var(--border);border-radius:4px;margin-top:2px;flex-shrink:0;cursor:pointer;transition:all .15s}ul.checklist li.checked:before{background:var(--accent);border-color:var(--accent);background-image:url("data:image/svg+xml,%3Csvg width='10' height='8' viewBox='0 0 10 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 4l2.5 2.5L9 1' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:center}footer{text-align:center;padding:32px;border-top:1px solid var(--border);color:var(--text-secondary);font-size:.85rem}@media (max-width: 640px){header h1{font-size:1.6rem}.grid{grid-template-columns:1fr}}.top-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.top-nav .logo{font-size:1.1rem;font-weight:700;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-decoration:none}.nav-links{display:flex;gap:8px}.nav-links a{color:var(--text-secondary);text-decoration:none;padding:8px 16px;border-radius:8px;font-size:.9rem;font-weight:500;transition:all .15s}.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--surface-2)}.hero{text-align:center;padding:80px 24px;background:linear-gradient(180deg,rgba(59,130,246,.06) 0%,transparent 60%)}.hero h1{font-size:2.5rem;font-weight:700;letter-spacing:-.03em;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero p{margin-top:12px;color:var(--text-secondary);font-size:1.1rem;max-width:520px;margin-inline:auto}.hero-actions{margin-top:32px;display:flex;gap:12px;justify-content:center}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;border:none;transition:all .15s;text-decoration:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#2563eb}.btn-secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}.btn-small{padding:6px 12px;font-size:.8rem}.btn-danger{background:var(--danger);color:#fff}.chat-container{display:grid;grid-template-columns:260px 1fr;height:calc(100vh - 60px)}.chat-sidebar{background:var(--surface);border-right:1px solid var(--border);padding:20px;display:flex;flex-direction:column;gap:12px;overflow-y:auto}.chat-sidebar h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary)}.conversation-list{list-style:none;display:flex;flex-direction:column;gap:4px}.conversation-item{padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .15s;display:flex;flex-direction:column;gap:2px}.conversation-item:hover,.conversation-item.active{background:var(--surface-2)}.conversation-item span{font-size:.85rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-item small{font-size:.75rem;color:var(--text-secondary)}.chat-main{display:flex;flex-direction:column;background:var(--bg)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--surface)}.chat-header select{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:6px;font-size:.85rem}.chat-messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.message{max-width:80%;padding:14px 18px;border-radius:12px;font-size:.92rem;line-height:1.6;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.user-message{align-self:flex-end;background:var(--accent);color:#fff}.assistant-message{align-self:flex-start;background:var(--surface);border:1px solid var(--border)}.tool-message{align-self:flex-start;background:var(--surface-2);border:1px dashed var(--border);font-size:.8rem;font-family:JetBrains Mono,monospace;color:var(--text-secondary)}.tool-calls{margin-top:10px;display:flex;flex-direction:column;gap:6px}.tool-call{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:.8rem}.tool-call summary{font-weight:600;cursor:pointer;color:var(--accent-2)}.tool-call pre{margin-top:8px;padding:8px;background:var(--surface);border-radius:6px;overflow-x:auto;font-size:.75rem}.chat-input-area{display:flex;gap:12px;padding:16px 24px;border-top:1px solid var(--border);background:var(--surface)}.chat-input-area textarea{flex:1;background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:12px 16px;border-radius:10px;font-size:.9rem;resize:none;font-family:inherit}.chat-input-area textarea:focus{outline:none;border-color:var(--accent)}.builder-container{display:flex;flex-direction:column;height:calc(100vh - 60px)}.builder-toolbar{display:flex;align-items:center;gap:12px;padding:12px 24px;background:var(--surface);border-bottom:1px solid var(--border);flex-wrap:wrap}.builder-input{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:8px 14px;border-radius:6px;font-size:.9rem;min-width:200px}.builder-node-palette{display:flex;gap:8px}.node-type-btn{padding:6px 12px;border-radius:6px;border:1px solid;background:var(--surface-2);color:var(--text);font-size:.8rem;cursor:pointer;transition:all .15s}.node-type-btn:hover{background:var(--border)}.builder-main{display:grid;grid-template-columns:1fr 300px;flex:1;overflow:hidden}.builder-canvas{position:relative;background:var(--bg);overflow:auto;background-image:radial-gradient(circle,var(--border) 1px,transparent 1px);background-size:20px 20px}.builder-node{position:absolute;width:140px;background:var(--surface);border:2px solid;border-radius:10px;cursor:pointer;transition:box-shadow .15s;overflow:hidden}.builder-node:hover{box-shadow:var(--shadow)}.builder-node.selected{box-shadow:0 0 0 3px #3b82f64d}.node-header{padding:8px 12px;font-size:.8rem;font-weight:600}.node-body{padding:8px 12px;font-size:.75rem;color:var(--text-secondary)}.builder-sidebar{background:var(--surface);border-left:1px solid var(--border);padding:20px;overflow-y:auto}.node-editor{display:flex;flex-direction:column;gap:12px}.node-editor label{font-size:.8rem;color:var(--text-secondary);font-weight:500}.node-editor input,.node-editor textarea{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:6px;font-size:.85rem;font-family:inherit}.node-editor input:focus,.node-editor textarea:focus{outline:none;border-color:var(--accent)}.builder-info{color:var(--text-secondary);font-size:.85rem;line-height:1.6}.builder-info h4{color:var(--text);margin-bottom:8px;font-size:.95rem}.workflow-list{list-style:none;display:flex;flex-direction:column;gap:6px;margin-top:12px}.workflow-item{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;background:var(--surface-2);border-radius:6px;font-size:.85rem}.builder-actions{margin-top:16px}@media (max-width: 900px){.chat-container{grid-template-columns:1fr}.chat-sidebar{display:none}.builder-main{grid-template-columns:1fr}.builder-sidebar{display:none}}.settings-container{max-width:640px;margin:40px auto;padding:0 24px}.settings-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px}.settings-card h2{font-size:1.4rem;font-weight:700;margin-bottom:8px;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.settings-desc{color:var(--text-secondary);font-size:.9rem;margin-bottom:28px;line-height:1.6}.provider-setting{display:flex;flex-direction:column;gap:6px;margin-bottom:20px}.provider-setting label{font-size:.85rem;font-weight:600;color:var(--text)}.provider-setting input,.provider-setting select{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:10px 14px;border-radius:8px;font-size:.9rem;font-family:inherit}.provider-setting input:focus,.provider-setting select:focus{outline:none;border-color:var(--accent)}.provider-setting small{color:var(--text-secondary);font-size:.8rem}.settings-actions{display:flex;gap:12px;margin-top:24px}.settings-note{margin-top:24px;padding:16px;background:#3b82f614;border:1px solid rgba(59,130,246,.2);border-radius:8px;font-size:.85rem;color:var(--text-secondary);line-height:1.6}.settings-note strong{color:var(--accent)}