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var(--k-space-3);background:var(--k-bg-subtle);border:1px solid var(--k-border-strong);cursor:pointer;font-size:var(--k-text-sm);color:var(--k-fg-muted);letter-spacing:var(--k-tracking-wide)}.file-input:hover{border-color:var(--k-accent);color:var(--k-fg)}.file-input input{display:none}.playground-stage{display:grid;grid-template-columns:220px 1fr 1fr;gap:1px;background:var(--k-border);border:1px solid var(--k-border);height:calc(100vh - 200px);min-height:480px}@media(max-width:960px){.playground-stage{grid-template-columns:1fr;height:auto}}.playground-pane{background:var(--k-bg);display:flex;flex-direction:column;min-height:0}.playground-pane__head{display:flex;align-items:center;justify-content:space-between;padding:var(--k-space-2) var(--k-space-3);border-bottom:1px solid var(--k-border);font-size:var(--k-text-xs);color:var(--k-fg-subtle);letter-spacing:var(--k-tracking-wider);text-transform:uppercase}.playground-pane__body{flex:1;min-height:0;overflow:auto;display:flex;flex-direction:column}.playground-tree{font-family:var(--k-font-mono);font-size:var(--k-text-sm);padding:var(--k-space-2)}.playground-tree button{display:block;width:100%;text-align:left;background:transparent;border:0;color:var(--k-fg-muted);font:inherit;padding:2px var(--k-space-2);cursor:pointer;letter-spacing:var(--k-tracking-wide)}.playground-tree button[data-active=true]{color:var(--k-accent);background:var(--k-bg-muted)}.playground-tree button:hover:not([data-active=true]){color:var(--k-fg)}.playground-editor{flex:1;width:100%;font-family:var(--k-font-mono);font-size:var(--k-text-sm);background:var(--k-bg);color:var(--k-fg);border:0;padding:var(--k-space-3);resize:none;outline:none;line-height:var(--k-leading-normal);white-space:pre;overflow-wrap:normal;overflow:auto}.playground-terminal{flex:1;min-height:200px;background:var(--k-bg);border-top:1px solid var(--k-border)}.playground-terminal--full{border-top:0}.playground-frame{flex:1;width:100%;border:0;background:#fff}.playground-status{padding:var(--k-space-3);font-family:var(--k-font-mono);font-size:var(--k-text-sm);color:var(--k-fg-muted);line-height:var(--k-leading-normal)}.playground-status[data-state=error]{color:var(--k-danger)}.playground-bar{display:flex;gap:var(--k-space-2);padding:var(--k-space-2) var(--k-space-3);border-bottom:1px solid var(--k-border);align-items:center;flex-wrap:wrap}.mono-input{font-family:var(--k-font-mono)}@media(max-width:640px){main{padding:var(--k-space-6) var(--k-space-4);gap:var(--k-space-8)}main.wide{padding:var(--k-space-4) var(--k-space-3)}.tool-hero h1{font-size:var(--k-text-2xl)}}