.tool-container{max-width:1200px;margin:0 auto;padding:var(--spacing-loose)}.tool-card{background:var(--bg-primary);border-radius:12px;box-shadow:0 2px 8px #00000014;padding:var(--spacing-loose);transition:box-shadow .2s ease-in-out}.tool-card:hover{box-shadow:0 4px 16px #0000001f}.tool-title{font-size:24px;font-weight:600;color:var(--text-primary);margin-bottom:var(--spacing-loose);line-height:1.3}.regex-input-section{margin-bottom:var(--spacing-standard)}.regex-input-wrapper{display:flex;gap:var(--spacing-standard);align-items:flex-start}.regex-input-group{flex:1}.regex-input-label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:var(--spacing-tight);line-height:1.6}.regex-input{width:100%;padding:12px 16px;border:1px solid var(--border-primary);border-radius:8px;font-family:Consolas,Monaco,Courier New,monospace;font-size:14px;line-height:1.6;color:var(--text-primary);background:var(--bg-primary);outline:none;transition:all .2s ease-in-out}.regex-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #3b82f633}.regex-input.error{border-color:var(--error);box-shadow:0 0 0 3px #ef444433}.regex-input::placeholder{color:var(--text-tertiary)}.flags-section{flex-shrink:0;min-width:200px}.flags-label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:var(--spacing-tight);line-height:1.6}.flags-wrapper{display:flex;gap:var(--spacing-tight);flex-wrap:wrap}.flag-checkbox{display:flex;align-items:center;gap:4px;padding:8px 12px;border:1px solid var(--border-primary);border-radius:6px;cursor:pointer;transition:all .2s ease-in-out;-webkit-user-select:none;user-select:none}.flag-checkbox:hover{border-color:var(--primary);background:#3b82f60d}.flag-checkbox.active{border-color:var(--primary);background:#3b82f61a}.flag-checkbox input{display:none}.flag-name{font-family:Consolas,Monaco,Courier New,monospace;font-size:14px;font-weight:600;color:var(--primary)}.flag-desc{font-size:12px;color:var(--text-tertiary)}.template-section{margin-bottom:var(--spacing-standard)}.template-select{width:100%;padding:10px 16px;border:1px solid var(--border-primary);border-radius:8px;font-size:14px;color:var(--text-primary);background:var(--bg-primary);cursor:pointer;outline:none;transition:all .2s ease-in-out}.template-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #3b82f633}.error-message{display:none;color:var(--error);font-size:12px;margin-top:var(--spacing-tight);line-height:1.5;padding:8px 12px;background:#ef44441a;border-radius:6px;animation:slideIn .3s ease-out}.error-message.show{display:block}@keyframes slideIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.test-text-section{margin-bottom:var(--spacing-standard)}.test-text-label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:var(--spacing-tight);line-height:1.6}.test-textarea-wrapper{position:relative}.test-textarea{width:100%;min-height:200px;max-height:400px;padding:12px 16px;border:1px solid var(--border-primary);border-radius:8px;font-family:inherit;font-size:14px;line-height:1.8;color:var(--text-primary);background:var(--bg-primary);resize:vertical;outline:none;transition:all .2s ease-in-out;white-space:pre-wrap;word-wrap:break-word}.test-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #3b82f633}.test-textarea::placeholder{color:var(--text-tertiary)}.highlight-layer{position:absolute;inset:0;padding:12px 16px;border:1px solid transparent;border-radius:8px;font-family:inherit;font-size:14px;line-height:1.8;color:transparent;background:transparent;pointer-events:none;white-space:pre-wrap;word-wrap:break-word;overflow:hidden}.match-highlight{background-color:#fef08a;border-radius:2px;padding:0 2px}.match-highlight.selected{background-color:#fde047;box-shadow:0 0 0 2px #fde04780}.group-color-1{background-color:#bfdbfe}.group-color-2{background-color:#bbf7d0}.group-color-3{background-color:#fed7aa}.group-color-4{background-color:#e9d5ff}.group-color-5{background-color:#fecaca}.result-section{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-standard);animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.result-panel{background:var(--bg-secondary);border-radius:8px;padding:var(--spacing-standard)}.result-panel-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:var(--spacing-standard);padding-bottom:var(--spacing-tight);border-bottom:1px solid var(--border-primary)}.match-results{max-height:400px;overflow-y:auto}.match-item{padding:var(--spacing-standard);background:var(--bg-primary);border-radius:6px;margin-bottom:var(--spacing-tight);cursor:pointer;transition:all .2s ease-in-out;border:1px solid transparent}.match-item:hover{border-color:var(--primary);transform:translate(4px)}.match-item.selected{border-color:var(--primary);background:#3b82f60d}.match-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-tight)}.match-index{font-size:12px;font-weight:600;color:var(--primary);background:#3b82f61a;padding:2px 8px;border-radius:4px}.match-position{font-size:12px;color:var(--text-tertiary)}.match-content{font-family:Consolas,Monaco,Courier New,monospace;font-size:13px;color:var(--text-primary);word-break:break-all;line-height:1.6;padding:8px;background:var(--bg-secondary);border-radius:4px}.match-groups{margin-top:var(--spacing-tight)}.group-item{display:flex;align-items:center;gap:var(--spacing-tight);padding:6px 8px;margin-top:4px;background:var(--bg-secondary);border-radius:4px;font-size:12px}.group-label{font-weight:600;color:var(--text-secondary)}.group-value{font-family:Consolas,Monaco,Courier New,monospace;color:var(--text-primary)}.no-match{text-align:center;padding:var(--spacing-extra);color:var(--text-tertiary)}.no-match-icon{font-size:48px;margin-bottom:var(--spacing-standard);opacity:.5}.no-match-text{font-size:14px}.regex-explanation{font-size:14px;line-height:1.8}.explanation-item{display:flex;align-items:flex-start;gap:var(--spacing-standard);padding:var(--spacing-tight) 0;border-bottom:1px solid var(--border-secondary)}.explanation-item:last-child{border-bottom:none}.explanation-token{flex-shrink:0;font-family:Consolas,Monaco,Courier New,monospace;font-size:13px;font-weight:600;color:var(--primary);background:#3b82f61a;padding:4px 8px;border-radius:4px;min-width:40px;text-align:center}.explanation-desc{flex:1;color:var(--text-secondary)}.stats-bar{display:flex;gap:var(--spacing-loose);padding:var(--spacing-standard);background:var(--bg-secondary);border-radius:8px;margin-bottom:var(--spacing-standard)}.stat-item{display:flex;align-items:center;gap:var(--spacing-tight)}.stat-label{font-size:13px;color:var(--text-tertiary)}.stat-value{font-size:16px;font-weight:600;color:var(--primary)}.navbar{background:var(--bg-primary);box-shadow:0 2px 8px #00000014;position:sticky;top:0;z-index:100}.navbar-container{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-standard) 0}.logo{display:flex;align-items:center;gap:var(--spacing-standard);cursor:pointer;transition:all .2s ease-in-out}.logo:hover{transform:translateY(-2px)}.logo span{font-size:20px;font-weight:600;color:var(--text-primary)}.nav-links{display:flex;gap:var(--spacing-loose)}.nav-links a{color:var(--text-secondary);font-weight:500}.main-content{min-height:calc(100vh - 300px);padding:var(--spacing-extra) 0}.footer{background:var(--bg-tertiary);padding:var(--spacing-extra) 0;margin-top:var(--spacing-extra)}.footer-container{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-loose)}.footer-column h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:var(--spacing-standard)}.footer-column p{color:var(--text-secondary);font-size:14px;line-height:1.6;margin-bottom:var(--spacing-tight)}.footer-column ul{list-style:none}.footer-column ul li{margin-bottom:var(--spacing-tight)}.footer-column ul li a{color:var(--text-secondary);font-size:14px}.footer-column ul li a:hover{color:var(--primary)}.copyright{margin-top:var(--spacing-standard);font-size:12px;color:var(--text-tertiary)}@media(max-width:767px){.tool-container,.tool-card{padding:var(--spacing-standard)}.tool-title{font-size:20px}.regex-input-wrapper{flex-direction:column}.flags-section{width:100%;min-width:auto}.result-section{grid-template-columns:1fr}.stats-bar{flex-wrap:wrap}.stat-item{flex:1;min-width:120px}.navbar-container{flex-wrap:wrap}.logo{width:100%;justify-content:center;margin-bottom:var(--spacing-standard)}.nav-links{width:100%;justify-content:center}.footer-container{grid-template-columns:1fr}}