:root{color-scheme:light;--bg: #f5f7fb;--ink: #17202e;--muted: #667085;--line: #dbe2ea;--panel: #ffffff;--accent: #1f7a67;--accent-2: #ec6f4b;--danger: #b42318;--shadow: 0 18px 45px rgba(24, 39, 75, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,input,textarea{font:inherit}.app-shell{min-height:100vh;display:grid;grid-template-columns:280px 1fr}.rail{background:#111827;color:#f8fafc;padding:28px 18px;display:flex;flex-direction:column;gap:12px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:750;margin-bottom:18px}.step{display:grid;grid-template-columns:22px 1fr 18px;gap:10px;align-items:center;width:100%;min-height:44px;padding:0 12px;border-radius:8px;color:#b8c3d7;background:transparent;border:0;text-align:left;justify-content:stretch}.step>svg:first-child{width:18px;height:18px}.step.active{background:#ffffff1c;color:#fff}.step.done{color:#d4fff3}.step:disabled{opacity:.45}.rail-note{margin-top:auto;color:#aeb9cc;font-size:13px;line-height:1.45;border-top:1px solid rgba(255,255,255,.12);padding-top:16px}.recent-projects{display:grid;gap:8px;min-height:0;max-height:240px;overflow:auto;padding-top:8px}.recent-title{color:#e5edf8;font-weight:750;font-size:13px}.recent-row{display:grid;grid-template-columns:minmax(0,1fr) 32px;gap:6px;align-items:center}.recent-open{border:1px solid rgba(255,255,255,.12);background:#ffffff0f;color:#f8fafc;border-radius:8px;padding:8px;display:grid;gap:2px;text-align:left;min-width:0}.recent-open span,.recent-open small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-open small,.recent-empty{color:#aeb9cc;font-size:12px}.output-recent{max-height:none;overflow:visible;border-top:1px solid var(--line);padding-top:14px}.output-recent .recent-title{color:var(--ink)}.output-recent .recent-open{border-color:var(--line);background:#f8fafc;color:var(--ink)}.output-recent .recent-open small,.output-recent .recent-empty{color:var(--muted)}.output-recent .icon-danger{border-color:#f2b8b5;color:var(--danger);background:#fff4f2}.icon-danger{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;border:1px solid rgba(255,255,255,.12);color:#fecaca;background:#b423182e}.workspace{padding:28px;min-width:0}.fallback-shell{grid-template-columns:1fr;place-items:center;padding:24px}.fallback-panel{max-width:720px;width:100%}.login-required{display:grid;gap:14px;justify-items:start}.login-required h1{margin-bottom:0}.topbar{display:flex;justify-content:space-between;gap:24px;align-items:flex-start;margin-bottom:22px}.top-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}h1,h2,p{margin-top:0}h1{font-size:clamp(28px,4vw,46px);line-height:1.02;margin-bottom:8px;letter-spacing:0}h2{font-size:22px;margin-bottom:8px}.topbar p,.muted{color:var(--muted);line-height:1.55}.status-pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;padding:10px 14px;border-radius:8px;min-width:96px;justify-content:center}.user-pill{display:inline-flex;align-items:center;min-height:40px;max-width:260px;border:1px solid var(--line);background:#eefaf6;color:#176452;padding:8px 12px;border-radius:8px;font-size:13px;font-weight:750;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.panel{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:8px;padding:22px}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.split{display:grid;grid-template-columns:minmax(340px,1.1fr) minmax(320px,.9fr);gap:20px;align-items:stretch}.stack{display:flex;flex-direction:column;gap:12px;min-height:100%}.drop{min-height:250px;border:1px dashed #b8c4d4;background:#f8fafc;border-radius:8px;padding:24px;display:flex;flex-direction:column;justify-content:center;gap:12px}.ad-asset-drop{justify-content:flex-start}.drop input{border:1px solid var(--line);background:#fff;border-radius:8px;padding:10px}button{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:8px;min-height:42px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}button:disabled{opacity:.55;cursor:not-allowed}.primary{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:700}.wide{grid-column:1 / 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