:root{--bg:#ffffff;--bg-surface:#f5f5f5;--bg-input:#ffffff;--text:#1a1a1a;--text-muted:#666666;--accent:#2563eb;--accent-hover:#1d4ed8;--border:#e0e0e0;--radius:8px;--shadow:0 1px 3px rgba(0, 0, 0, 0.08);--font-mono:'SF Mono','Fira Code','Cascadia Code','Consolas',monospace;--font-sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;--max-width:960px;--transition:0.2s ease}[data-theme=dark]{--bg:#0f0f0f;--bg-surface:#1a1a1a;--bg-input:#252525;--text:#e5e5e5;--text-muted:#999999;--accent:#3b82f6;--accent-hover:#60a5fa;--border:#333333;--shadow:0 1px 3px rgba(0, 0, 0, 0.3)}*,::after,::before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}.site-header{display:flex;align-items:center;justify-content:space-between;max-width:var(--max-width);margin:0 auto;padding:1rem 1.5rem}.site-header h1{font-size:1.25rem;font-weight:700}.site-header h1 a{color:var(--text);text-decoration:none}.site-header nav{display:flex;align-items:center;gap:1rem}.theme-toggle{background:0 0;border:1px solid var(--border);border-radius:var(--radius);padding:.4rem .6rem;cursor:pointer;color:var(--text);font-size:1rem;transition:background var(--transition)}.theme-toggle:hover{background:var(--bg-surface)}.main{max-width:var(--max-width);margin:0 auto;padding:1rem 1.5rem 3rem}.tool-group{margin-bottom:2.5rem}.tool-group:last-child{margin-bottom:0}.tool-group-heading{font-size:1.125rem;font-weight:700;margin-bottom:1rem;color:var(--text);display:flex;align-items:center;gap:.5rem}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}.tool-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-decoration:none;color:var(--text);transition:box-shadow var(--transition),border-color var(--transition)}.tool-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}.tool-card h2,.tool-card h3{font-size:1rem;font-weight:600;margin-bottom:.35rem}.tool-card p{font-size:.875rem;color:var(--text-muted)}.tool-card .tag{display:inline-block;font-size:.7rem;text-transform:uppercase;letter-spacing:.04em;color:var(--accent);margin-top:.5rem}.tool-header{margin-bottom:1.5rem}.tool-header h1{font-size:1.5rem;font-weight:700}.tool-header p{color:var(--text-muted);margin-top:.25rem}.tool-area{display:flex;flex-direction:column;gap:1rem}.tool-area input[type=number],.tool-area input[type=text],.tool-area textarea{width:100%;padding:.75rem;font-family:var(--font-mono);font-size:.875rem;background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);resize:vertical;outline:0;transition:border-color var(--transition)}.tool-area input:focus,.tool-area textarea:focus{border-color:var(--accent)}.tool-area textarea{min-height:160px}.tool-row{display:flex;gap:1rem;flex-wrap:wrap}.tool-row>*{flex:1 1 0;min-width:0}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;border:none;border-radius:var(--radius);cursor:pointer;transition:background var(--transition)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}.btn-copy{background:var(--bg-surface);color:var(--text);border:1px solid var(--border);font-size:.8rem;padding:.35rem .75rem}.btn-copy:hover{background:var(--border)}.btn-copy.copied{border-color:#22c55e;color:#22c55e}.output-area{position:relative}.output-area .btn-copy{position:absolute;top:.5rem;right:.5rem}label{display:block;font-size:.8rem;font-weight:600;margin-bottom:.35rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}select{padding:.5rem .75rem;font-size:.875rem;background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);outline:0;cursor:pointer}.site-footer{max-width:var(--max-width);margin:0 auto;padding:1.5rem;text-align:center;font-size:.8rem;color:var(--text-muted);border-top:1px solid var(--border)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (max-width:768px){.tool-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}.tool-group{margin-bottom:2rem}.main,.site-header{padding:1rem}}@media (max-width:480px){html{font-size:15px}.site-header{flex-direction:column;gap:.75rem;align-items:flex-start;padding:.75rem 1rem}.site-header h1{font-size:1.125rem}.main{padding:.75rem}.tool-header h1{font-size:1.25rem}.tool-row{flex-direction:column}.tool-grid{grid-template-columns:1fr}.tool-group{margin-bottom:1.5rem}.tool-group-heading{font-size:1rem}.btn,.btn-primary,.btn-secondary{min-height:44px;padding:.625rem 1rem}.btn-copy{min-height:40px;padding:.5rem .875rem}.theme-toggle{min-height:44px;min-width:44px;padding:.625rem}.tool-area input[type=number],.tool-area input[type=text],.tool-area textarea,select{min-height:44px;font-size:1rem}.tool-area input[type=number],.tool-area input[type=text],.tool-area textarea,code,pre{max-width:100%;word-wrap:break-word;overflow-wrap:break-word}pre{overflow-x:auto;-webkit-overflow-scrolling:touch}table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}}#dt-copy-toast{position:fixed;bottom:1.5rem;right:1.5rem;background:var(--accent);color:#fff;padding:.5rem 1rem;border-radius:var(--radius);font-size:.875rem;font-weight:500;opacity:0;pointer-events:none;transition:opacity .2s;z-index:9999}#dt-copy-toast.visible{opacity:1}