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ease}.nav-btn:hover{background-color:rgba(0,0,0,.04)}.nav-btn.active{background-color:#06c;color:#fff;font-weight:500}.quicksearch-content{flex:1;background-color:#fff;position:relative}.content-page{width:100%;padding:0}.tutorial-content-area{flex:1;background-color:#fff;padding:20px;overflow-y:auto;display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 120px)}.under-construction{text-align:center;padding:60px 40px;background:linear-gradient(135deg,#f8f9fa,#e9ecef);border-radius:20px;box-shadow:0 10px 40px rgba(0,0,0,.1);max-width:500px;margin:0 auto}.construction-title{font-size:32px;font-weight:700;color:#333;margin-bottom:20px;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.construction-text{font-size:16px;color:#666;line-height:1.6;margin:10px 0}.construction-icon{font-size:64px;margin-top:30px;animation:bounce 2s infinite}@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}.search-content-area{flex:1;background-color:#fff;padding:20px;overflow-y:auto}.description-area{margin-bottom:25px;text-align:center}.description-title{font-size:60px;font-weight:600;color:#333;margin:0 0 15px 0}.description-text{font-size:14px;line-height:1.5;color:#666;margin:0 0 8px 0}.regex-builder-container{background:#f8f9fa;border-radius:12px;padding:30px;margin:0 auto;width:fit-content;overflow-x:auto;display:flex;gap:30px;align-items:flex-start}.section-title{font-size:19px;font-weight:700;margin:0 0 20px 0;padding:12px 20px;background:linear-gradient(to bottom right,#fff,#ffe4cc);color:#000;border-radius:8px;text-shadow:none;display:inline-block;text-align:center}.function-area{display:flex;flex-direction:column;position:relative}.columns-group{display:flex;gap:20px}.group-1{display:grid;grid-template-columns:200px 180px 180px 180px 180px;gap:20px;align-items:start}.section-divider{width:2px;min-height:400px;background:linear-gradient(180deg,transparent 10%,#fc9 50%,transparent 90%);margin:0 15px;border-radius:1px;flex-shrink:0;align-self:stretch}.group-2,.group-3{justify-content:center}.group-3 .column-7{width:350px}.column{display:flex;flex-direction:column;gap:10px;height:fit-content}.column-header{margin-bottom:15px;text-align:center}.column-title{font-size:16px;font-weight:600;margin:0;padding:8px 12px;border-radius:6px;color:#000;text-shadow:none;background:linear-gradient(to bottom right,#f8f9fa,#e9ecef)}.column-title.positive{background:linear-gradient(to bottom right,#fff,#d4edda);color:#000}.column-title.negative{background:linear-gradient(to bottom right,#fff,#cce7ff);color:#000}.column-title.prefix{background:linear-gradient(to bottom right,#fff,#d4edda);color:#000}.column-title.suffix{background:linear-gradient(to bottom right,#fff,#cce7ff);color:#000}.number-control-section{background-color:#f9f9f9;border-radius:8px;padding:15px;margin-bottom:15px}.toggle-switch-container{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:15px}.toggle-label{font-size:14px;font-weight:500;color:#333;min-width:20px;text-align:center}.toggle-switch{position:relative;display:inline-block;width:50px;height:24px;cursor:pointer}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#007aff;transition:.3s;border-radius:24px}.toggle-slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:#fff;transition:.3s;border-radius:50%;box-shadow:0 2px 4px rgba(0,0,0,.2)}.toggle-switch input:checked+.toggle-slider{background-color:#34c759}.toggle-switch input:checked+.toggle-slider:before{transform:translateX(26px)}.toggle-switch:hover .toggle-slider{box-shadow:0 0 8px rgba(0,122,255,.3)}.number-inputs{display:flex;align-items:center;gap:8px;justify-content:center}.number-input{width:60px;padding:8px;border:1px solid #ddd;border-radius:4px;text-align:center;font-size:14px}.number-input:focus{outline:0;border-color:#06c;box-shadow:0 0 0 2px rgba(0,102,204,.2)}.wave-symbol{font-size:16px;font-weight:700;color:#666}.function-buttons{display:flex;flex-direction:column;gap:8px}.func-btn{padding:8px 10px;background-color:#f5f5f7;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease;font-size:13px;color:#1d1d1f;text-align:center}.func-btn:hover{background-color:#e5e5ea;transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,.1)}.func-btn:active{transform:translateY(0);background-color:#06c;color:#fff}.operation-buttons{display:flex;flex-direction:column;gap:15px;padding-top:20px}.op-btn{padding:18px 20px;background-color:#06c;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease;font-size:15px;font-weight:500;min-height:50px}.op-btn:hover{background-color:#0071e3;transform:translateY(-1px);box-shadow:0 2px 6px rgba(0,102,204,.3)}.op-btn:active{transform:translateY(0)}.mode-btn{background:linear-gradient(135deg,#f8f9fa 0,#e9ecef 100%);color:#1d1d1f;border:1px solid rgba(0,0,0,.1);font-weight:600;letter-spacing:.5px;position:relative;overflow:hidden;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06),inset 0 1px 0 rgba(255,255,255,.1)}.mode-btn::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s}.mode-btn:hover{background:linear-gradient(135deg,#e9ecef 0,#dee2e6 100%);color:#1d1d1f;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.15),0 2px 4px rgba(0,0,0,.1),inset 0 1px 0 rgba(255,255,255,.2)}.mode-btn:hover::before{left:100%}.mode-btn.active{background:linear-gradient(135deg,#007aff 0,#0051d5 100%);color:#fff;border-color:#0051d5;box-shadow:0 4px 16px rgba(0,122,255,.4),0 2px 8px rgba(0,122,255,.2),inset 0 1px 0 rgba(255,255,255,.2),0 0 0 3px rgba(0,122,255,.1);transform:translateY(-1px)}.mode-btn.active::before{background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent)}.mode-btn.active:hover{background:linear-gradient(135deg,#0071e3 0,#004bb8 100%);border-color:#004bb8;box-shadow:0 6px 20px rgba(0,122,255,.5),0 3px 10px rgba(0,122,255,.3),inset 0 1px 0 rgba(255,255,255,.3),0 0 0 3px rgba(0,122,255,.15);transform:translateY(-2px)}.mode-btn:active{transform:translateY(0);transition:transform .1s}.mode-btn.active:active{transform:translateY(-1px)}.output-section{display:flex;flex-direction:column;gap:10px;height:100%}.output-label{font-size:14px;font-weight:600;color:#1d1d1f;margin-bottom:5px}.output-textarea{width:100%;min-height:150px;padding:12px;border:none;border-radius:6px;font-size:13px;font-family:'Courier New',monospace;resize:vertical;background-color:#f9f9f9}.output-textarea:focus{outline:0;box-shadow:0 0 0 2px rgba(0,102,204,.2);background-color:#fff}#current-regex{background-color:#fff}#current-regex:focus{background-color:#fff;box-shadow:0 0 0 3px rgba(0,102,204,.1)}#accumulated-regex{background-color:#fff}#accumulated-regex:focus{background-color:#fff;box-shadow:0 0 0 3px rgba(40,167,69,.1)}.copy-btn{padding:12px 20px;background-color:#28a745;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease;font-size:14px;font-weight:500;margin-top:auto}.copy-btn:hover{background-color:#218838;transform:translateY(-1px);box-shadow:0 2px 6px rgba(40,167,69,.3)}.copy-btn:active{transform:translateY(0)}.clear-btn{padding:12px 20px;background-color:#dc3545;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease;font-size:14px;font-weight:500;margin-top:8px}.clear-btn:hover{background-color:#c82333;transform:translateY(-1px);box-shadow:0 2px 6px rgba(220,53,69,.3)}.clear-btn:active{transform:translateY(0)}@media (max-width:1400px){.regex-builder-container{padding:25px}.group-1{grid-template-columns:180px 160px 160px 160px 160px;gap:15px}.section-divider{margin:0 12px;min-height:350px}.group-3 .column-7{width:400px}}@media (max-width:1200px){.regex-builder-container{padding:20px}.group-1{grid-template-columns:160px 140px 140px 140px 140px;gap:10px}.section-divider{margin:0 10px;min-height:300px}.search-content-area{padding:15px}.group-3 .column-7{width:350px}}@media (max-width:768px){.quicksearch-layout{flex-direction:column}.quicksearch-nav{width:100%;height:auto;flex-direction:row;justify-content:center;padding:1rem 0;border-right:none;border-bottom:1px solid rgba(0,0,0,.1)}.nav-btn{width:auto;margin:0 .5rem;padding:.6rem 1rem;font-size:.8rem}.description-area{margin-bottom:20px}.description-title{font-size:54px;margin-bottom:12px}.description-text{font-size:13px;margin-bottom:6px}.regex-builder-container{flex-direction:column;padding:15px;gap:20px}.group-1{grid-template-columns:1fr;gap:15px}.section-title{font-size:18px;padding:10px 15px;margin-bottom:15px}.section-divider{width:100%;height:2px;background:linear-gradient(90deg,transparent 10%,#fc9 50%,transparent 90%);margin:15px 0;align-self:auto;min-height:auto}.back-button{position:static;margin-right:auto;margin-left:1rem}.column-title{font-size:14px;padding:6px 10px}.search-content-area{padding:10px;overflow-y:auto}.column{width:100%}.function-buttons{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.operation-buttons{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;padding-top:10px}.output-textarea{min-height:80px}.group-3 .column-7{width:100%}.tutorial-content-area{min-height:calc(100vh - 200px);padding:15px}.under-construction{padding:40px 20px}.construction-title{font-size:24px}.construction-text{font-size:14px}.construction-icon{font-size:48px}}@media (max-width:480px){.quicksearch-nav{padding:.8rem 0}.nav-btn{padding:.5rem .8rem;font-size:.75rem}.function-buttons{grid-template-columns:1fr}.operation-buttons{grid-template-columns:repeat(2,1fr)}.number-inputs{flex-direction:column;gap:5px}.wave-symbol{order:2}.under-construction{padding:30px 15px}.construction-title{font-size:20px}.construction-text{font-size:13px}.construction-icon{font-size:40px;margin-top:20px}}