:root{--bg-app:#f8fafc;--bg-sidebar:#fff;--bg-card:#fff;--bg-input:#f1f5f9;--border-color:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--text-sidebar-heading:#94a3b8;--text-sidebar-item:#334155;--text-sidebar-active:#f95738;--bg-sidebar-active:#fff1ec;--accent-primary:#f95738;--accent-hover:#e04325;--accent-light:#ffede8;--accent-blue:#3b82f6;--accent-green:#10b981;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}[data-theme=dark]{--bg-app:#0b0f17;--bg-sidebar:#111827;--bg-card:#1f2937;--bg-input:#111827;--border-color:#374151;--text-main:#f9fafb;--text-muted:#9ca3af;--text-sidebar-heading:#6b7280;--text-sidebar-item:#d1d5db;--text-sidebar-active:#ff7a59;--bg-sidebar-active:#2a1b18;--accent-primary:#ff7a59;--accent-hover:#f95738;--accent-light:#381f19;--shadow-sm:0 1px 2px 0 #0000004d;--shadow-md:0 4px 6px -1px #0006;--shadow-lg:0 10px 15px -3px #00000080}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-app);color:var(--text-main);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.5}a{color:inherit;text-decoration:none}.app-container{min-height:100vh;display:flex}.sidebar{background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);z-index:40;flex-direction:column;flex-shrink:0;width:270px;height:100vh;transition:transform .25s;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar-header{padding:20px 24px 12px}.sidebar-title{letter-spacing:.08em;color:#94a3b8;text-transform:uppercase;font-size:.85rem;font-weight:800}.sidebar-search{padding:0 20px 12px}.search-input-wrapper{position:relative}.search-icon{color:var(--text-muted);position:absolute;top:50%;left:10px;transform:translateY(-50%)}.search-input{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);width:100%;color:var(--text-main);outline:none;padding:8px 10px 8px 34px;font-size:.825rem}.search-input:focus{border-color:var(--accent-primary)}.sidebar-nav{flex-direction:column;gap:20px;padding:8px 16px 24px;display:flex}.category-group{flex-direction:column;gap:4px;display:flex}.category-heading{letter-spacing:.08em;color:var(--text-sidebar-heading);text-transform:uppercase;padding:8px 10px 4px;font-size:.75rem;font-weight:750}.sidebar-item{border-radius:var(--radius-md);color:var(--text-sidebar-item);align-items:center;gap:12px;padding:10px 12px;font-size:.875rem;font-weight:600;transition:all .15s;display:flex}.sidebar-item:hover{background-color:var(--bg-input);color:var(--text-main)}.sidebar-item.active{background-color:var(--bg-sidebar-active);color:var(--text-sidebar-active);font-weight:700}.sidebar-item-icon{width:20px;height:20px;color:inherit;opacity:.85;justify-content:center;align-items:center;display:flex}.sidebar-item.active .sidebar-item-icon{color:var(--text-sidebar-active);opacity:1}.main-area{flex-direction:column;flex:1;min-width:0;display:flex}.top-header{background-color:var(--bg-sidebar);border-bottom:1px solid var(--border-color);z-index:30;justify-content:space-between;align-items:center;height:64px;padding:0 28px;display:flex;position:sticky;top:0}.top-header-left{align-items:center;gap:14px;display:flex}.top-header-right{align-items:center;gap:12px;display:flex}.mobile-menu-btn{color:var(--text-main);cursor:pointer;background:0 0;border:none;padding:6px;display:none}.breadcrumb{color:var(--text-muted);align-items:center;gap:8px;font-size:.85rem;display:flex}.breadcrumb-active{color:var(--text-main);font-weight:600}.page-container{width:100%;max-width:1280px;margin:0 auto;padding:28px}.tool-header{margin-bottom:24px}.tool-title-row{align-items:center;gap:12px;margin-bottom:6px;display:flex}.tool-title-icon{border-radius:var(--radius-md);background-color:var(--accent-light);width:36px;height:36px;color:var(--accent-primary);justify-content:center;align-items:center;display:flex}.tool-title{color:var(--text-main);letter-spacing:-.02em;font-size:1.6rem;font-weight:800}.tool-description{color:var(--text-muted);max-width:800px;font-size:.95rem}.tool-grid{grid-template-columns:1fr 1fr;gap:24px;display:grid}@media (max-width:900px){.tool-grid{grid-template-columns:1fr}}.tool-full-width{grid-column:1/-1}.card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px}.card-title{color:var(--text-main);justify-content:space-between;align-items:center;margin-bottom:16px;font-size:1.05rem;font-weight:700;display:flex}.form-group{flex-direction:column;gap:6px;margin-bottom:16px;display:flex}.form-label{color:var(--text-main);font-size:.85rem;font-weight:600}.form-input,.form-select,.form-textarea{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-main);font-family:var(--font-sans);outline:none;padding:10px 14px;font-size:.9rem;transition:border-color .15s}.form-textarea{font-family:var(--font-mono,monospace);resize:vertical;min-height:180px}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent-primary)}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.9rem;font-weight:600;transition:all .15s;display:inline-flex}.btn-primary{background-color:var(--accent-primary);color:#fff}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{background-color:var(--bg-input);color:var(--text-main);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--border-color)}.btn-group{flex-wrap:wrap;gap:10px;display:flex}.output-box{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);white-space:pre-wrap;word-break:break-all;max-height:350px;color:var(--text-main);padding:14px;font-family:monospace;font-size:.875rem;overflow-y:auto}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:20px;display:grid}.stat-card{background-color:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:center;padding:14px}.stat-value{color:var(--accent-primary);font-size:1.4rem;font-weight:800}.stat-label{text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:600}@media (max-width:768px){.sidebar{position:fixed;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.mobile-menu-btn{display:flex}.page-container{padding:16px}}