:root{--primary:#18a05b;--primary-light:#22c55e;--bg:#f5f5f5;--bg-dark:#1a1a2e;--sidebar-bg:#fff;--sidebar-width:280px;--card-bg:#fff;--card-border:#e5e7eb;--text:#1f2937;--text-secondary:#6b7280;--text-muted:#9ca3af;--input-bg:#fff;--input-border:#d1d5db;--input-focus:#18a05b;--hover-bg:#f3f4f6;--radius:8px;--shadow:0 1px 3px #0000001a;--shadow-lg:0 4px 12px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.app-layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--sidebar-bg);border-right:1px solid var(--card-border);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--card-border);padding:0}.sidebar-header h1{color:var(--primary);font-size:20px;font-weight:700}.sidebar-header p{color:var(--text-secondary);margin-top:4px;font-size:12px}.sidebar-search{border-bottom:1px solid var(--card-border);padding:12px 16px}.sidebar-search input{border:1px solid var(--input-border);border-radius:var(--radius);outline:none;width:100%;padding:8px 12px;font-size:14px;transition:border-color .2s}.sidebar-search input:focus{border-color:var(--input-focus)}.sidebar-nav{flex:1;padding:8px 0;overflow-y:auto}.sidebar-category{padding:0}.sidebar-category-title{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:10px 16px;font-size:11px;font-weight:700;display:flex}.sidebar-category-title:hover{color:var(--text-secondary)}.sidebar-tool{color:var(--text-secondary);cursor:pointer;border-left:3px solid #0000;align-items:center;gap:10px;padding:8px 16px 8px 28px;font-size:13px;text-decoration:none;transition:all .15s;display:flex}.sidebar-tool:hover{background:var(--hover-bg);color:var(--text)}.sidebar-tool.active{color:var(--primary);border-left-color:var(--primary);background:#f0fdf4;font-weight:500}.sidebar-tool-icon{text-align:center;width:20px;font-size:16px}.top-bar{border-bottom:1px solid var(--card-border);background:var(--card-bg);justify-content:flex-end;align-items:center;padding:8px 16px;display:flex}.language-select{border:1px solid var(--input-border);border-radius:var(--radius);background:var(--card-bg);color:var(--text);cursor:pointer;padding:4px 8px;font-size:13px}.main-content{margin-left:var(--sidebar-width);flex:1;min-height:100vh}.page-header{background:var(--card-bg);border-bottom:1px solid var(--card-border);padding:24px 32px}.page-header h2{font-size:24px;font-weight:700}.page-header p{color:var(--text-secondary);margin-top:4px;font-size:14px}.page-body{max-width:1200px;padding:24px 32px}.home-hero{text-align:center;border-radius:var(--radius);border:1px solid var(--card-border);background:linear-gradient(135deg,#f0fdf4 0%,#ecfdf5 100%);margin-bottom:32px;padding:40px 20px}.home-hero h1{color:var(--primary);margin-bottom:8px;font-size:32px;font-weight:800}.home-hero p{color:var(--text-secondary);font-size:15px}.home-count{margin-top:8px;color:var(--text-muted)!important;font-size:13px!important}.home-categories{margin-bottom:40px}.home-category h2{border-bottom:2px solid var(--primary);margin-bottom:16px;padding-bottom:8px;font-size:18px;font-weight:700;display:inline-block}.home-tools-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;display:grid}.home-tool-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);color:inherit;align-items:flex-start;gap:12px;padding:16px;text-decoration:none;transition:all .2s;display:flex}.home-tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-1px)}.home-tool-icon{flex-shrink:0;font-size:24px}.home-tool-name{margin-bottom:4px;font-size:14px;font-weight:600}.home-tool-desc{color:var(--text-secondary);font-size:12px;line-height:1.4}.home-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;display:grid}.tool-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);cursor:pointer;color:inherit;padding:20px;text-decoration:none;transition:all .2s;display:block}.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-2px)}.tool-card-icon{margin-bottom:12px;font-size:28px}.tool-card-title{margin-bottom:6px;font-size:15px;font-weight:600}.tool-card-desc{color:var(--text-secondary);font-size:13px;line-height:1.5}.tool-panel{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);margin-bottom:16px;padding:20px}.tool-panel-title{color:var(--text);margin-bottom:12px;font-size:14px;font-weight:600}.form-group{margin-bottom:16px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.form-input,.form-textarea,.form-select{border:1px solid var(--input-border);border-radius:var(--radius);background:var(--input-bg);width:100%;color:var(--text);outline:none;padding:10px 12px;font-family:inherit;font-size:14px;transition:border-color .2s}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--input-focus)}.form-textarea{resize:vertical;min-height:100px;font-family:SF Mono,Fira Code,Fira Mono,monospace;font-size:13px;line-height:1.6}.form-select{cursor:pointer}.btn{border:1px solid var(--input-border);border-radius:var(--radius);cursor:pointer;background:var(--card-bg);color:var(--text);align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .15s;display:inline-flex}.btn:hover{background:var(--hover-bg)}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-light);border-color:var(--primary-light)}.btn-sm{padding:4px 10px;font-size:12px}.btn-group{flex-wrap:wrap;gap:8px;display:flex}.result-box{border:1px solid var(--card-border);border-radius:var(--radius);word-break:break-all;background:#f8fafc;padding:12px;font-family:SF Mono,Fira Code,monospace;font-size:13px;position:relative}.result-box .copy-btn{position:absolute;top:8px;right:8px}.tool-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.tool-grid-full{grid-column:1/-1}.tool-table{border-collapse:collapse;width:100%;font-size:13px}.tool-table th,.tool-table td{text-align:left;border-bottom:1px solid var(--card-border);padding:8px 12px}.tool-table th{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.03em;font-size:12px;font-weight:600}.tool-table tr:hover td{background:var(--hover-bg)}.tag{color:var(--text-secondary);background:#e5e7eb;border-radius:4px;padding:2px 8px;font-size:11px;font-weight:500;display:inline-block}.tag-green{color:#166534;background:#dcfce7}.tag-blue{color:#1e40af;background:#dbeafe}.tag-red{color:#991b1b;background:#fee2e2}@media (width<=768px){.sidebar{transition:transform .3s;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.tool-grid{grid-template-columns:1fr}.page-body{padding:16px}.home-grid{grid-template-columns:1fr}}.home-category{margin-bottom:32px}.home-category-title{border-bottom:2px solid var(--primary);margin-bottom:16px;padding-bottom:8px;font-size:18px;font-weight:700;display:inline-block}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}.toggle{cursor:pointer;align-items:center;gap:8px;font-size:13px;display:inline-flex}.toggle input[type=checkbox]{appearance:none;cursor:pointer;background:#d1d5db;border-radius:10px;width:36px;height:20px;transition:background .2s;position:relative}.toggle input[type=checkbox]:after{content:"";background:#fff;border-radius:50%;width:16px;height:16px;transition:transform .2s;position:absolute;top:2px;left:2px}.toggle input[type=checkbox]:checked{background:var(--primary)}.toggle input[type=checkbox]:checked:after{transform:translate(16px)}.color-preview{border-radius:var(--radius);border:1px solid var(--card-border);width:40px;height:40px;display:inline-block}.mobile-menu-btn{z-index:200;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);cursor:pointer;padding:8px 12px;font-size:18px;display:none;position:fixed;top:12px;left:12px}@media (width<=768px){.mobile-menu-btn{display:block}}