.tools-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));gap:1.5rem;margin-top:1rem}.tool-card{display:flex;flex-direction:column;align-items:center;padding:2rem 1.5rem;border:1px solid rgba(0,0,0,0.1);border-radius:8px;color:rgba(0,0,0,0.8);transition:transform 0.2s, box-shadow 0.2s, border-color 0.2s}.tool-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,0.1);border-color:#00ab6b;color:rgba(0,0,0,0.8);text-decoration:none}.tool-card h3{font-size:1.15rem;font-weight:700;margin-bottom:0.5rem}.tool-card p{font-size:0.9rem;color:rgba(0,0,0,0.6);line-height:1.6;margin-bottom:0}.tool-icon{font-size:2.5rem;color:#00ab6b;margin-bottom:1rem}.tool-container{max-width:900px}.tool-info{padding-top:1.5rem;border-top:1px solid rgba(0,0,0,0.08)}.tool-info h2{font-size:1.1rem;font-weight:700;margin-bottom:0.75rem;margin-top:1.5rem}.tool-info h2:first-child{margin-top:0}.tool-info h4{font-size:0.95rem;font-weight:600;margin-bottom:0.5rem}.tool-info ul{padding-left:1.2rem;font-size:0.9rem;color:rgba(0,0,0,0.6);line-height:1.8}.tool-info p{font-size:0.9rem;color:rgba(0,0,0,0.6);line-height:1.7}.json-output{margin-bottom:1rem}.json-pre{background:#1e1e1e;color:#d4d4d4;padding:1rem;border-radius:6px;overflow:auto;font-size:0.85rem;line-height:1.5;max-height:500px}.json-key{color:#9cdcfe}.json-string{color:#ce9178}.json-number{color:#b5cea8}.json-boolean{color:#569cd6}.json-null{color:#569cd6}.password-output{font-size:1.1rem;letter-spacing:0.5px}.password-strength-bar{flex-grow:1;height:6px;background:rgba(0,0,0,0.08);border-radius:3px;overflow:hidden}.password-strength-fill{height:100%;border-radius:3px;transition:width 0.3s, background-color 0.3s}.regex-highlight-box{padding:0.75rem;border:1px solid rgba(0,0,0,0.1);border-radius:6px;background:#fff;font-size:0.85rem;line-height:1.6;white-space:pre-wrap;word-break:break-all;max-height:300px;overflow-y:auto;margin-bottom:0.5rem}.regex-match{background-color:#ffc107;color:#000;border-radius:2px;padding:1px 2px}.diff-container{border:1px solid rgba(0,0,0,0.1);border-radius:6px;overflow:auto;max-height:600px;margin-bottom:1.5rem}.diff-table{width:100%;border-collapse:collapse;font-family:SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;font-size:0.82rem;line-height:1.5}.diff-ln{width:40px;min-width:40px;padding:0 8px;text-align:right;color:rgba(0,0,0,0.3);border-right:1px solid rgba(0,0,0,0.08);user-select:none;vertical-align:top}.diff-code{padding:0 12px;white-space:pre-wrap;word-break:break-all}.diff-equal{background:#fff}.diff-add{background:#e6ffec}.diff-add .diff-code{color:#22863a}.diff-add .diff-ln{background:#d4f8db}.diff-remove{background:#ffeef0}.diff-remove .diff-code{color:#cb2431}.diff-remove .diff-ln{background:#fdd}.bg-preview{border:1px solid rgba(0,0,0,0.1);border-radius:6px;overflow:hidden;min-height:120px;display:flex;align-items:center;justify-content:center}.bg-preview img,.bg-preview canvas{display:block;max-width:100%;height:auto}.bg-checkerboard{background-image:linear-gradient(45deg, #e0e0e0 25%, transparent 25%),linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),linear-gradient(45deg, transparent 75%, #e0e0e0 75%),linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);background-size:20px 20px;background-position:0 0, 0 10px, 10px -10px, -10px 0}