*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--color-background-primary:#fff;--color-background-secondary:#f5f5f3;--color-background-tertiary:#f0f0ee;--color-text-primary:#1a1a1a;--color-text-secondary:#666;--color-border-tertiary:rgba(0,0,0,.1);--color-border-secondary:rgba(0,0,0,.2);--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"SF Mono","Fira Code","Courier New",monospace;--border-radius-md:8px;--border-radius-lg:12px;--dock-width:56px;--nav-height:48px}body{background:var(--color-background-primary);color:var(--color-text-primary);font-family:var(--font-sans);font-size:14px;line-height:1.7}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:var(--font-sans)}.tool-layout{display:grid;gap:0;grid-template-columns:360px 1fr;min-height:calc(100vh - var(--nav-height))}.tool-controls{background:var(--color-background-primary);border-right:.5px solid var(--color-border-tertiary);display:flex;flex-direction:column;gap:20px;overflow-y:auto;padding:24px}.tool-preview{align-items:center;background:var(--color-background-secondary);display:flex;justify-content:center;overflow:auto;padding:24px}.tool-label{color:var(--color-text-secondary);font-size:10px;font-weight:500;letter-spacing:.08em;margin-bottom:6px;text-transform:uppercase}.tool-section{display:flex;flex-direction:column;gap:6px}.tool-divider{background:var(--color-border-tertiary);height:.5px;margin:4px 0}.tool-slider{accent-color:var(--color-text-primary);cursor:pointer;width:100%}.tool-input{background:var(--color-background-primary);border:.5px solid var(--color-border-secondary);border-radius:var(--border-radius-md);font-family:var(--font-sans);font-size:13px;outline:none;padding:7px 10px;width:100%}.tool-input:focus{border-color:var(--color-text-secondary)}.tool-input.invalid{border-color:#e53e3e}.tool-btn{background:var(--color-background-primary);border:.5px solid var(--color-border-secondary);border-radius:var(--border-radius-md);color:var(--color-text-primary);cursor:pointer;font-size:12px;padding:7px 14px;transition:background .12s}.tool-btn:hover{background:var(--color-background-secondary)}.tool-btn.primary{background:var(--color-text-primary);border-color:var(--color-text-primary);color:var(--color-background-primary)}.tool-btn.primary:hover{opacity:.85}.css-output{background:var(--color-background-primary);border:.5px solid var(--color-border-tertiary);border-radius:var(--border-radius-md);font-family:var(--font-mono);font-size:11px;line-height:1.8;overflow-x:auto;padding:14px;white-space:pre}.copy-row{align-items:center;display:flex;gap:8px;justify-content:space-between}.tool-header{background:var(--color-background-primary);border-bottom:.5px solid var(--color-border-tertiary);padding:24px}.tool-header h1{color:var(--color-text-primary);font-size:32px;font-weight:600;line-height:1.2;margin-bottom:6px}.tool-header p{color:var(--color-text-secondary);font-size:14px;margin:0}@media(max-width:768px){.tool-layout{grid-template-columns:1fr}.tool-controls{border-bottom:.5px solid var(--color-border-tertiary);border-right:none}}