:root{--bg-primary:#0f0f0f;--bg-secondary:#1a1a2e;--bg-card:#16213e;--bg-input:#1a1a2e;--text-primary:#e8e8e8;--text-secondary:#a0a0b0;--text-muted:#6b6b7b;--accent:#4e9af1;--accent-hover:#3d7dd4;--accent-dim:rgba(78, 154, 241, 0.15);--success:#4caf50;--warning:#ff9800;--border:#2a2a3e;--radius:8px;--radius-lg:12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}.breadcrumb{max-width:900px;margin:0 auto;padding:16px 20px;font-size:.875rem;color:var(--text-muted)}.breadcrumb a{color:var(--accent);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.container{max-width:900px;margin:0 auto;padding:0 20px 40px}.tool-header{margin-bottom:32px}.tool-header h1{font-size:1.75rem;font-weight:700;margin-bottom:8px;color:var(--text-primary)}.subtitle{color:var(--text-secondary);font-size:1rem}.config-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:28px}.form-group{margin-bottom:18px}.form-group label{display:block;margin-bottom:6px;font-size:.9rem;font-weight:600;color:var(--text-secondary)}.form-group input[type=text],.form-group select{width:100%;padding:10px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:1rem;font-family:inherit;transition:border-color .2s}.form-group input[type=text]:focus,.form-group select:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.form-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:20px}.option-group label{display:block;margin-bottom:6px;font-size:.85rem;font-weight:600;color:var(--text-secondary)}.option-group input[type=number]{width:100%;padding:8px 12px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:.9rem;font-family:inherit}.option-group input[type=number]:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.option-toggle label{display:flex;align-items:center;gap:8px;cursor:pointer;padding:8px 0}.option-toggle input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);cursor:pointer}.option-toggle span{font-size:.9rem;color:var(--text-secondary)}.btn{padding:10px 20px;border:none;border-radius:var(--radius);font-size:.9rem;font-weight:600;cursor:pointer;transition:background-color .2s,transform .1s}.btn:active{transform:scale(.97)}.btn-primary{background:var(--accent);color:#fff;width:100%}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border);color:var(--text-primary)}.results-section{margin-bottom:32px}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.results-header h2{font-size:1.25rem;color:var(--text-primary)}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}.result-card{display:flex;align-items:center;justify-content:space-between;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;transition:border-color .2s}.result-card:hover{border-color:var(--accent)}.result-username{font-family:'Courier New',Courier,monospace;font-size:1rem;font-weight:600;color:var(--text-primary);word-break:break-all}.result-pattern{display:block;font-size:.72rem;color:var(--text-muted);margin-top:2px}.btn-copy{background:0 0;border:1px solid var(--border);color:var(--text-secondary);padding:6px 12px;border-radius:var(--radius);font-size:.78rem;cursor:pointer;white-space:nowrap;transition:background-color .2s,color .2s,border-color .2s}.btn-copy:hover{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}.btn-copy.copied{background:var(--success);border-color:var(--success);color:#fff}.empty-state{grid-column:1/-1;text-align:center;padding:40px 20px;color:var(--text-muted);font-style:italic}.tips-section{margin-bottom:32px}.tips-section h2{font-size:1.25rem;margin-bottom:16px;color:var(--text-primary)}.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.tip-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.tip-card h3{font-size:.95rem;font-weight:600;color:var(--accent);margin-bottom:6px}.tip-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.5}.info-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:32px}.info-section h2{font-size:1.1rem;margin-bottom:12px;color:var(--text-primary)}.info-section p{color:var(--text-secondary);font-size:.9rem;margin-bottom:10px}.info-section p:last-child{margin-bottom:0}@media (max-width:600px){.tool-header h1{font-size:1.4rem}.results-grid{grid-template-columns:1fr}.options-grid{grid-template-columns:1fr}}