:root{--color-bg:#f7f8fa;--color-surface:#fff;--color-border:#e2e5ea;--color-text:#1a1d23;--color-text-muted:#6b7280;--color-primary:#2f6fed;--color-primary-soft:#eaf1ff;--color-danger:#c0392b;--color-bg-hover:#eef0f3;--radius:8px;--sidebar-width:220px}*{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.45}h1,h2,h3{margin:0 0 .5rem;font-weight:600}h1{font-size:1.4rem}h2{font-size:1.15rem}h3{font-size:1rem}p{margin:0 0 .5rem}.app-shell{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--color-surface);border-right:1px solid var(--color-border);flex-direction:column;flex-shrink:0;padding:1rem .75rem;display:flex}.sidebar-section{margin-bottom:1.25rem}.sidebar-footer{border-top:1px solid var(--color-border);color:var(--color-text-muted);margin-top:auto;padding-top:1rem;font-size:.85rem}.main-content{flex:1;min-width:0;max-width:780px;padding:2rem}@media (width<=720px){.app-shell{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--color-border);flex-direction:row;align-items:center;gap:.5rem;width:100%;padding:.5rem;overflow-x:auto}.sidebar-section{flex-shrink:0;margin-bottom:0}.sidebar-footer{display:none}.main-content{padding:1rem}}.nav-link{text-align:left;width:100%;color:var(--color-text);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:6px;margin-bottom:.15rem;padding:.5rem .65rem;display:block}.nav-link:hover{background:var(--color-bg-hover)}.nav-link.active{background:var(--color-primary-soft);color:var(--color-primary);font-weight:600}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);margin-bottom:1rem;padding:1rem}.card-muted{background:var(--color-bg)}.btn{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font:inherit;cursor:pointer;border-radius:6px;padding:.45rem .9rem;display:inline-block}.btn:hover:not(:disabled){background:var(--color-bg-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:#2559c2}.btn-danger{color:var(--color-danger);border-color:var(--color-border)}.field{margin-bottom:.75rem}.field label{margin-bottom:.25rem;font-size:.85rem;font-weight:500;display:block}.field-hint{color:var(--color-text-muted);font-weight:400}.input,.textarea,.select{border:1px solid var(--color-border);width:100%;font:inherit;background:var(--color-surface);color:var(--color-text);border-radius:6px;padding:.5rem .6rem}.badge{background:var(--color-bg-hover);color:var(--color-text-muted);border-radius:999px;padding:.15rem .5rem;font-size:.75rem;display:inline-block}.badge-idea{background:var(--color-primary-soft);color:var(--color-primary)}.badge-brief{color:#9a6c00;background:#fdf3d8}.badge-strategy{color:#1e7a3d;background:#e4f6ea}.badge-script{color:#5a34a8;background:#ece3fb}.empty-state,.loading-state{color:var(--color-text-muted);padding:.5rem 0;font-style:italic}.error-state{color:var(--color-danger)}.text-muted{color:var(--color-text-muted);font-size:.9rem}.stack>*+*{margin-top:.5rem}.list-plain{margin:0;padding:0;list-style:none}