:root{--bg:#0a0e16;--bg-2:#0e1420;--surface:#121a29;--surface-2:#182236;--border:#223049;--border-soft:#1a2438;--text:#e8edf6;--text-dim:#93a1b8;--text-faint:#64748b;--accent:#f5b942;--accent-strong:#ffcf6b;--accent-dim:rgba(245,185,66,.14);--blue:#6cb2ff;--blue-dim:rgba(108,178,255,.12);--green:#4ade80;--red:#f87171;--radius:14px;--maxw:920px;--font-sans:"Heebo";--font-mono:"JetBrains Mono"}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-sans),"Segoe UI",system-ui,sans-serif;-webkit-font-smoothing:antialiased;background-image:linear-gradient(rgba(108,178,255,.035) 1px,transparent 0),linear-gradient(90deg,rgba(108,178,255,.035) 1px,transparent 0);background-size:44px 44px}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;cursor:pointer}.shell{min-height:100dvh;display:flex;flex-direction:column}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:30;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:rgba(10,14,22,.82);border-bottom:1px solid var(--border-soft)}.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:12px 20px;gap:12px}.brand,.topbar-inner{display:flex;align-items:center}.brand{gap:10px;font-weight:700;font-size:16px;letter-spacing:.2px;background:none;border:none;color:var(--text)}.brand-logo{width:30px;height:30px;flex:0 0 auto}.brand small{display:block;font-weight:400;font-size:11px;color:var(--text-faint);letter-spacing:.4px}.topbar-actions{-webkit-margin-start:auto;margin-inline-start:auto;display:flex;align-items:center;gap:8px}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:10px;padding:8px 14px;font-size:13.5px;font-weight:500;transition:background .15s,border-color .15s,transform .05s;white-space:nowrap}.btn:hover{background:var(--surface-2);border-color:#2c3d5c}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);border-color:var(--accent);color:#201503;font-weight:700}.btn-primary:hover{background:var(--accent-strong);border-color:var(--accent-strong)}.btn-ghost{background:transparent;border-color:transparent;color:var(--text-dim)}.btn-ghost:hover{background:var(--surface);border-color:var(--border);color:var(--text)}.btn-small{padding:5px 10px;font-size:12.5px;border-radius:8px}.btn:disabled{opacity:.45;cursor:not-allowed}.landing{flex:1 1;display:flex;flex-direction:column}.hero{max-width:var(--maxw);margin:0 auto;padding:72px 20px 40px;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--accent);border:1px solid rgba(245,185,66,.35);background:var(--accent-dim);border-radius:999px;padding:5px 14px;margin-bottom:22px;font-weight:600;letter-spacing:.3px}.hero h1{font-size:clamp(30px,5.4vw,52px);line-height:1.12;font-weight:800;letter-spacing:-.5px;margin-bottom:18px}.hero h1 .accent{color:var(--accent)}.hero p.sub{font-size:clamp(15px,2.2vw,18px);color:var(--text-dim);max-width:640px;margin:0 auto 30px;line-height:1.65}.hero-ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.hero-ctas .btn{padding:12px 24px;font-size:15px;border-radius:12px}.hero-note{margin-top:14px;font-size:12.5px;color:var(--text-faint)}.features{max-width:var(--maxw);margin:0 auto;padding:24px 20px 70px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:14px;gap:14px}.feature{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:22px 20px;text-align:start}.feature .f-icon{font-size:20px;margin-bottom:12px;display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;border-radius:10px;background:var(--blue-dim)}.feature h3{font-size:15px;font-weight:700;margin-bottom:7px}.feature p{font-size:13.5px;color:var(--text-dim);line-height:1.6}.chat-wrap{max-width:var(--maxw);width:100%;margin:0 auto;padding:0 16px}.chat-wrap,.messages{flex:1 1;display:flex;flex-direction:column}.messages{padding:26px 0 10px;gap:18px}.msg{display:flex;gap:12px;max-width:100%}.msg-avatar{width:32px;height:32px;border-radius:9px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-top:2px}.msg.user .msg-avatar{background:var(--surface-2);color:var(--text-dim);border:1px solid var(--border)}.msg.assistant .msg-avatar{background:var(--accent-dim);border:1px solid rgba(245,185,66,.35);color:var(--accent)}.msg-body{min-width:0;flex:1 1;font-size:14.5px;line-height:1.7;overflow-wrap:break-word}.msg.user .msg-body{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:12px 16px;white-space:pre-wrap}.msg-role{font-size:11.5px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--text-faint);margin-bottom:5px}.msg.assistant .msg-role{color:var(--accent)}.msg-body h1,.msg-body h2,.msg-body h3,.msg-body h4{margin:18px 0 8px;line-height:1.35}.msg-body h1{font-size:19px}.msg-body h2{font-size:17px}.msg-body h3{font-size:15.5px}.msg-body h4{font-size:14.5px}.msg-body p{margin:8px 0}.msg-body ol,.msg-body ul{margin:8px 0;-webkit-padding-start:22px;padding-inline-start:22px}.msg-body li{margin:4px 0}.msg-body blockquote{-webkit-border-start:3px solid var(--border);border-inline-start:3px solid var(--border);-webkit-padding-start:14px;padding-inline-start:14px;color:var(--text-dim);margin:10px 0}.msg-body hr{border:none;border-top:1px solid var(--border-soft);margin:16px 0}.msg-body code{font-family:var(--font-mono),monospace;font-size:.88em;background:var(--surface-2);border:1px solid var(--border-soft);border-radius:6px;padding:1.5px 6px;direction:ltr;unicode-bidi:embed}.codeblock{margin:14px 0;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#0b1018;direction:ltr}.codebar{display:flex;align-items:center;justify-content:space-between;padding:7px 12px;background:var(--surface);border-bottom:1px solid var(--border-soft)}.codebar .lang{font-family:var(--font-mono),monospace;font-size:11.5px;color:var(--text-faint);letter-spacing:.5px}.copy-btn{border:1px solid var(--border);background:transparent;color:var(--text-dim);font-size:12px;border-radius:7px;padding:4px 11px;font-weight:600;transition:all .15s}.copy-btn:hover{color:var(--accent);border-color:rgba(245,185,66,.5)}.copy-btn.copied{color:var(--green);border-color:rgba(74,222,128,.5)}.codeblock pre{padding:14px 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12px;transition:border-color .15s}.composer:focus-within{border-color:rgba(245,185,66,.55)}.composer textarea{flex:1 1;background:transparent;border:none;outline:none;resize:none;color:var(--text);font-family:inherit;font-size:14.5px;line-height:1.6;max-height:220px;padding:6px 4px}.composer textarea::placeholder{color:var(--text-faint)}.send-btn{background:var(--accent);color:#201503;border:none;border-radius:11px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;flex:0 0 auto;transition:background .15s}.send-btn:hover{background:var(--accent-strong)}.send-btn:disabled{background:var(--surface-2);color:var(--text-faint)}.send-btn svg{width:18px;height:18px}.composer-hint{text-align:center;font-size:11.5px;color:var(--text-faint);margin-top:8px}.modal-overlay{position:fixed;inset:0;background:rgba(4,7,12,.7);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:var(--bg-2);border:1px solid var(--border);border-radius:18px;width:100%;max-width:480px;padding:26px;max-height:88dvh;overflow-y:auto}.modal h2{font-size:18px;margin-bottom:6px}.modal .modal-sub{font-size:13px;color:var(--text-dim);line-height:1.6;margin-bottom:20px}.field{margin-bottom:16px}.field label{display:block;font-size:12.5px;font-weight:600;color:var(--text-dim);margin-bottom:7px;letter-spacing:.3px}.field input,.field select{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:10px 13px;font-size:14px;font-family:inherit;outline:none}.field input:focus,.field select:focus{border-color:rgba(245,185,66,.55)}.field input.key-input{font-family:var(--font-mono),monospace;font-size:12.5px;direction:ltr}.privacy-note{display:flex;gap:9px;font-size:12.5px;color:var(--text-dim);background:var(--surface);border:1px solid var(--border-soft);border-radius:10px;padding:11px 13px;line-height:1.55;margin-bottom:18px}.privacy-note .lock{color:var(--green);flex:0 0 auto}.modal-actions{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}.link-btn{background:none;border:none;color:var(--blue);font-size:12.5px;padding:0}.link-btn:hover{text-decoration:underline}.danger-btn{color:var(--red)}.footer{border-top:1px solid var(--border-soft);padding:14px 20px;font-size:12px;color:var(--text-faint)}.footer-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:space-between}.version-marker{font-family:var(--font-mono),monospace;color:var(--accent);font-weight:600}[dir=rtl] .send-btn svg{transform:scaleX(-1)}@media (max-width:560px){.hero{padding-top:46px}.brand small,.msg-avatar{display:none}}