:root{--primary:#2D6A4F;--primary-light:#40916C;--primary-lighter:#52B788;--primary-lightest:#74C69D;--primary-subtle:#D8F3DC;--bg-main:#F8FAF9;--bg-surface:#FFFFFF;--bg-sidebar:#FFFFFF;--text-main:#1B2B22;--text-muted:#495E53;--text-inverse:#FFFFFF;--border:#C8E3D4;--border-hover:#2D6A4F;--error:#E63946;--error-bg:#FDE8E9;--shadow-sm:0 1px 3px rgba(82, 183, 136, 0.05);--shadow-md:0 4px 6px -1px rgba(82, 183, 136, 0.1),0 2px 4px -1px rgba(82, 183, 136, 0.06);--shadow-lg:0 10px 15px -3px rgba(82, 183, 136, 0.1),0 4px 6px -2px rgba(82, 183, 136, 0.05);--sidebar-width:260px;--border-radius-sm:6px;--border-radius:12px;--border-radius-lg:16px;--font-sans:'Plus Jakarta Sans',sans-serif;--font-mono:'JetBrains Mono',monospace;--transition:all 0.25s cubic-bezier(0.4, 0, 0.2, 1)}body.dark-theme{--bg-main:#0B130E;--bg-surface:#122118;--bg-sidebar:#122118;--text-main:#E2EFE9;--text-muted:#95D5B2;--border:#233F2E;--border-hover:#52B788;--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.3);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.4);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.5);--primary-subtle:#1C3527;--primary:#52B788}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background-color:var(--bg-main);color:var(--text-main);line-height:1.6;overflow-x:hidden;transition:background-color .3s ease,color .3s ease}.font-mono{font-family:var(--font-mono)}.app-container{display:flex;height:100vh}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:100;transition:transform var(--transition)}.sidebar-header{height:72px;padding:0 24px;display:flex;align-items:center;border-bottom:1px solid var(--border)}.logo{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700;color:var(--primary)}.sidebar-nav{flex:1;overflow-y:auto;padding:20px 16px}.nav-category{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);font-weight:700;margin-bottom:8px;margin-top:16px;padding-left:12px;padding-right:12px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:var(--transition)}.nav-category:hover{color:var(--primary)}.nav-category i{font-size:14px;transition:transform .3s ease}.category-group{display:none;animation:fadeIn .3s ease-out}.category-group.open{display:block}.nav-category:first-child{margin-top:0}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--border-radius-sm);color:var(--text-main);text-decoration:none;font-weight:500;font-size:14px;transition:var(--transition);cursor:pointer;margin-bottom:4px;border:1px solid transparent}.nav-item i{font-size:18px;color:var(--text-muted);transition:var(--transition)}.nav-item:hover{background-color:var(--bg-main);color:var(--primary)}.nav-item:hover i{color:var(--primary)}.nav-item.active{background-color:var(--primary-subtle);color:var(--primary);border-color:var(--primary-lightest)}.nav-item.active i{color:var(--primary)}.main-content{flex:1;display:flex;flex-direction:column;height:100vh;overflow:hidden}.topbar{height:72px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;background-color:var(--bg-surface);border-bottom:1px solid var(--border)}.current-tool-header h1{font-size:18px;font-weight:700}.current-tool-header p{font-size:13px;color:var(--text-muted)}.mobile-menu-btn{display:none;background:0 0;border:none;font-size:24px;color:var(--text-main);cursor:pointer;margin-right:16px}.topbar-actions button{background:0 0;border:1px solid var(--border);border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-main);font-size:20px;transition:var(--transition)}.topbar-actions button:hover{background-color:var(--primary-subtle);color:var(--primary);border-color:var(--primary-lightest)}.tool-container{flex:1;overflow-y:auto;padding:32px;position:relative}.tool-section{display:none;animation:fadeIn .3s ease-out}.tool-section.active{display:block}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.welcome-banner{background:linear-gradient(135deg,var(--primary-light),var(--primary));color:#fff;padding:40px;border-radius:var(--border-radius-lg);margin-bottom:32px;box-shadow:var(--shadow-md)}.welcome-banner h2{font-size:28px;margin-bottom:8px}.quick-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}.quick-link-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--border-radius);padding:24px;cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:flex-start;box-shadow:var(--shadow-sm)}.quick-link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--primary-light)}.quick-link-card i{font-size:32px;color:var(--primary);margin-bottom:16px;background:var(--primary-subtle);padding:12px;border-radius:12px}.quick-link-card h3{font-size:16px;margin-bottom:4px}.quick-link-card p{font-size:13px;color:var(--text-muted)}.btn{padding:10px 20px;border-radius:var(--border-radius-sm);font-weight:600;font-size:14px;cursor:pointer;border:none;transition:var(--transition);display:inline-flex;align-items:center;gap:8px;font-family:inherit}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-light);box-shadow:0 4px 12px rgba(82,183,136,.3)}.btn-secondary{background-color:var(--primary-subtle);color:var(--primary)}.btn-secondary:hover{background-color:var(--primary-lightest)}.btn-icon{background:0 0;border:none;color:var(--text-muted);cursor:pointer;padding:6px;border-radius:4px;font-size:18px;transition:var(--transition)}.btn-icon:hover{background:var(--primary-subtle);color:var(--primary)}.full-width{width:100%}.mt-2{margin-top:8px}.mt-3{margin-top:16px}.mt-4{margin-top:24px}.mb-4{margin-bottom:24px}.split-pane{display:flex;gap:20px;height:calc(100vh - 180px);margin-top:20px}.split-pane.column{flex-direction:column;height:auto}.pane{flex:1;display:flex;flex-direction:column;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow-sm)}.pane-header{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;background:var(--bg-main);font-size:14px;font-weight:600}.pane-actions{display:flex;gap:4px}.pane input[type=text],.pane textarea{flex:1;border:none;padding:16px;resize:none;font-family:var(--font-mono);font-size:14px;line-height:1.5;background:0 0;color:var(--text-main);outline:0}.pane-controls{display:flex;flex-direction:column;justify-content:center;gap:12px}.tool-card{background:var(--bg-surface);padding:32px;border-radius:var(--border-radius);border:1px solid var(--border);box-shadow:var(--shadow-sm)}.tool-card.narrow{max-width:600px;margin:0 auto}.control-group{margin-bottom:24px}.control-group label{display:block;margin-bottom:8px;font-weight:600;font-size:14px}.toggle-group{display:inline-flex;background:var(--bg-main);border:1px solid var(--border);border-radius:var(--border-radius-sm);padding:4px}.toggle-group input[type=radio]{display:none}.toggle-group label{padding:8px 16px;margin:0;cursor:pointer;font-size:14px;font-weight:500;border-radius:4px;color:var(--text-muted);transition:var(--transition)}.toggle-group input[type=radio]:checked+label{background:var(--bg-surface);color:var(--primary);box-shadow:var(--shadow-sm)}input[type=datetime-local],input[type=number],input[type=text]{width:100%;padding:10px 16px;border:1px solid var(--border);border-radius:var(--border-radius-sm);background:var(--bg-main);color:var(--text-main);font-family:var(--font-mono);font-size:14px;transition:var(--transition);outline:0}input[type=datetime-local]:focus,input[type=number]:focus,input[type=text]:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-subtle)}.input-group{margin-bottom:16px}.input-group label{display:block;margin-bottom:6px;font-size:13px;color:var(--text-muted);font-weight:600}.input-with-copy{position:relative;display:flex}.input-with-copy input{padding-right:48px}.input-with-copy .copy-btn{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:0 0;border:none;color:var(--primary);padding:8px;cursor:pointer;border-radius:4px}.input-with-copy .copy-btn:hover{background:var(--primary-subtle)}.color-preview{width:100%;height:120px;border-radius:var(--border-radius);margin-bottom:24px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);transition:background-color .1s;background-color:var(--primary-lighter)}.color-picker-wrapper{position:relative;background:rgba(255,255,255,.4);backdrop-filter:blur(4px);padding:8px 16px;border-radius:20px;display:flex;align-items:center;gap:8px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.1)}body.dark-theme .color-picker-wrapper{background:rgba(0,0,0,.4)}.color-picker-wrapper input[type=color]{opacity:0;position:absolute;width:100%;height:100%;cursor:pointer}.input-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}.password-display{position:relative;margin-bottom:16px}.password-display input{font-size:20px;padding:16px 80px 16px 16px;text-align:center;background:var(--primary-subtle);border-color:var(--primary-lightest);color:var(--primary);font-weight:700}.pg-actions{position:absolute;right:8px;top:50%;transform:translateY(-50%);display:flex;gap:4px}.pg-strength{display:flex;align-items:center;gap:12px;margin-bottom:32px;font-size:13px;font-weight:600}.strength-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden;position:relative}.strength-bar::after{content:'';position:absolute;left:0;top:0;height:100%;width:50%;background:#f1c40f;transition:width .3s,background .3s}.strength-bar.weak::after{width:25%;background:var(--error)}.strength-bar.medium::after{width:50%;background:#f1c40f}.strength-bar.strong::after{width:75%;background:var(--primary-light)}.strength-bar.very-strong::after{width:100%;background:var(--primary)}input[type=range]{width:100%;accent-color:var(--primary)}.checkbox-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.custom-checkbox{display:flex;align-items:center;cursor:pointer;font-size:14px;user-select:none}.custom-checkbox input{position:absolute;opacity:0;cursor:pointer;height:0;width:0}.checkmark{height:20px;width:20px;background-color:var(--bg-main);border:2px solid var(--border-hover);border-radius:4px;margin-right:10px;position:relative;transition:var(--transition)}.custom-checkbox:hover input~.checkmark{border-color:var(--primary)}.custom-checkbox input:checked~.checkmark{background-color:var(--primary);border-color:var(--primary)}.checkmark:after{content:"";position:absolute;display:none;left:6px;top:2px;width:4px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}.custom-checkbox input:checked~.checkmark:after{display:block}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.stat-card{background:var(--bg-surface);border:1px solid var(--border);padding:24px;border-radius:var(--border-radius);text-align:center;box-shadow:var(--shadow-sm)}.stat-value{display:block;font-size:32px;font-weight:700;color:var(--primary);line-height:1.2;font-family:var(--font-mono)}.stat-label{font-size:13px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}.grid-2-cols{display:grid;grid-template-columns:1fr 1fr;gap:24px}.converter-box{background:var(--bg-main);padding:24px;border-radius:var(--border-radius);border:1px solid var(--border)}.converter-box h3{font-size:16px;margin-bottom:16px;color:var(--text-main)}.alert-box{background:var(--primary-subtle);color:var(--primary);padding:16px;border-radius:var(--border-radius-sm);font-size:14px}.alert-box.error{background:var(--error-bg);color:var(--error)}.alert-box.hidden{display:none}.result-box{padding:12px 16px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--border-radius-sm);font-family:var(--font-mono);min-height:46px;display:flex;align-items:center;word-break:break-all}.regex-input-wrapper{display:flex;align-items:center;font-family:var(--font-mono);background:var(--bg-main);border:1px solid var(--border);border-radius:var(--border-radius-sm);padding:8px 16px}.regex-input-wrapper:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-subtle)}.regex-slash{color:var(--text-muted);font-weight:700;font-size:18px}.regex-input-wrapper input{border:none;background:0 0;box-shadow:none;padding:4px 8px}.regex-input-wrapper input:focus{box-shadow:none}#regex-pattern{flex:1;color:var(--primary);font-weight:600}#regex-flags{width:60px;color:var(--text-muted)}.regex-editor-container{position:relative;min-height:200px}.regex-highlights,.regex-textarea{width:100%;min-height:200px;padding:16px;font-family:var(--font-mono);font-size:14px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}.regex-textarea{position:absolute;top:0;left:0;background:0 0;color:transparent;caret-color:var(--text-main);z-index:2;border:none;resize:vertical}.regex-highlights{position:absolute;top:0;left:0;z-index:1;color:var(--text-main);border:none;background:0 0}.regex-match{background-color:var(--primary-lightest);border-radius:2px;color:#000}.match-list{list-style:none;max-height:300px;overflow-y:auto;border:1px solid var(--border);border-radius:var(--border-radius-sm);background:var(--bg-main)}.match-list li{padding:8px 16px;border-bottom:1px solid var(--border);font-family:var(--font-mono);font-size:13px}.match-list li:last-child{border-bottom:none}.text-muted{color:var(--text-muted)!important}.toast{position:fixed;bottom:32px;right:32px;background:var(--text-main);color:var(--bg-surface);padding:12px 24px;border-radius:30px;font-size:14px;font-weight:500;box-shadow:var(--shadow-lg);transform:translateY(100px);opacity:0;transition:all .3s cubic-bezier(.68, -.55, .265, 1.55);z-index:1000;display:flex;align-items:center;gap:8px}.toast.show{transform:translateY(0);opacity:1}.toast i{color:var(--primary-light);font-size:18px}@media (max-width:768px){.app-container{flex-direction:column}.sidebar{position:fixed;left:-100%;top:0;bottom:0;transition:left .3s ease}.sidebar.open{left:0}.mobile-menu-btn{display:block}.grid-2-cols,.input-grid,.split-pane{flex-direction:column;grid-template-columns:1fr;height:auto}.pane-controls{flex-direction:row;padding:16px 0}.stats-grid{grid-template-columns:1fr 1fr}}.seo-article{margin-top:48px;padding-top:32px;border-top:1px solid var(--border);color:var(--text-main)}.seo-article h2{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--primary)}.seo-article p{margin-bottom:16px;font-size:15px;color:var(--text-muted);line-height:1.7}.seo-article ol,.seo-article ul{margin-bottom:16px;padding-left:24px;color:var(--text-muted);font-size:15px}.seo-article li{margin-bottom:8px}.app-footer{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;margin-top:32px;border-top:1px solid var(--border);gap:12px;color:var(--text-muted);font-size:.9rem}.footer-links{display:flex;gap:20px}.footer-links a{color:var(--text-muted);text-decoration:none;transition:color .2s}.footer-links a:hover{color:var(--primary)}.footer-copyright{display:flex;align-items:center;gap:5px}.sidebar-search{padding:16px 16px 4px 16px;border-bottom:1px solid var(--border)}.search-box{position:relative;display:flex;align-items:center}.search-box i{position:absolute;left:12px;color:var(--text-muted);font-size:16px}.search-box input{width:100%;padding:10px 10px 10px 36px;border:1px solid var(--border);border-radius:var(--border-radius-sm);background:var(--bg-main);color:var(--text-main);font-size:13px;transition:var(--transition);outline:0}.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-subtle)}