:root{--bg:#f8faf9;--card:#fff;--white:#fff;--ink:#152b25;--sub:#6a7b73;--muted:#7b8983;--line:#e5ece8;--green:#116c48;--deep:#104d37;--bright:#1b9465;--soft:#eef7f2;--hero:#115c40;--warn:#fff6df;--warn-ink:#775918;--shadow:0 15px 35px -30px rgba(5,48,33,.35);color-scheme:light}
:root[data-theme="dark"]{--bg:#111a17;--card:#18251f;--white:#1b2b24;--ink:#eaf4ec;--sub:#a8beb0;--muted:#93ab9c;--line:#2b4034;--green:#5bd19a;--deep:#e3f6e9;--bright:#6ce5ad;--soft:#203c2e;--hero:#174c37;--warn:#46391b;--warn-ink:#f9df99;--shadow:0 15px 30px -24px rgba(0,0,0,.5);color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 -apple-system,BlinkMacSystemFont,"Malgun Gothic","Apple SD Gothic Neo","Noto Sans KR",system-ui,sans-serif;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #51cba0;outline-offset:3px}a{text-decoration:none;color:inherit}button{border:0}.sr-only{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;overflow:hidden}.top-stripe{height:4px;background:linear-gradient(90deg,#1a915e,#81c8aa,#1a915e)}.header{background:var(--card);border-bottom:1px solid var(--line)}.header-inner{max-width:1380px;height:77px;padding:0 44px;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px}.brand-icon{height:42px;width:42px;background:#187e53;color:white;font-weight:900;font-size:25px;border-radius:10px;display:grid;place-items:center;position:relative;box-shadow:0 4px 10px rgba(7,60,35,.13)}.brand-grid{position:absolute;font-size:14px;bottom:-1px;right:-3px;background:#0d5c40;color:#d4f8e7;border:2px solid var(--card);border-radius:4px;height:17px;width:17px;line-height:12px;text-align:center}.brand-words{display:flex;flex-direction:column;line-height:1.25}.brand-words strong{font-size:20px;letter-spacing:-.7px}.brand-words small{font:700 9px/1.5 system-ui;letter-spacing:2.3px;color:var(--green);margin-top:3px}.header-right{display:flex;gap:17px;align-items:center}.status{font-size:12px;color:var(--sub);display:flex;align-items:center;gap:7px}.status-dot{width:7px;height:7px;border-radius:50%;background:#23b77e;box-shadow:0 0 0 4px rgba(37,183,126,.12)}.icon-button{background:transparent;color:var(--sub);border-radius:9px;width:35px;height:35px;font-size:21px}.about-btn{font-size:13px;border:1px solid var(--line);padding:8px 14px;border-radius:8px;font-weight:700}.page{max-width:1380px;padding:30px 44px 54px;margin:auto}.hero{position:relative;overflow:hidden;min-height:329px;border-radius:23px;background:linear-gradient(112deg,#10543c 0%,#15734c 65%,#198b5a 100%);color:#fff;box-shadow:0 25px 44px -40px #12593b}.hero-content{position:relative;z-index:1;padding:35px 52px 32px;max-width:1000px}.hero-backdrop span{position:absolute;font-weight:900;font-size:108px;letter-spacing:-8px;opacity:.055;user-select:none}.hero-backdrop span:first-child{top:-38px;right:10%;transform:rotate(-17deg)}.hero-backdrop span:nth-child(2){bottom:19px;right:5%;transform:rotate(16deg)}.hero-backdrop span:last-child{top:77px;right:30%;font-style:italic}.eyebrow{font-size:11px;letter-spacing:2.5px;color:#bae9d1;font-weight:800;margin:0 0 11px}.hero h1{font-size:36px;line-height:1.34;letter-spacing:-1.7px;margin:0;font-weight:850}.hero h1 em{font-style:normal;color:#c6f9da}.hero-desc{color:#d8f0e4;font-size:14px;margin:10px 0 22px}.search-form{max-width:810px;background:white;height:63px;border-radius:13px;display:flex;align-items:center;padding:7px 7px 7px 18px;gap:13px;box-shadow:0 8px 28px rgba(0,0,0,.11)}.search-icon{display:flex;color:#6b8377}.search-form input{flex:1;min-width:0;border:0;outline:0;background:transparent;color:#1b3026;font-size:16px;letter-spacing:-.35px}.search-form input::placeholder{color:#a3aaa5}.search-submit{white-space:nowrap;height:49px;padding:0 19px;border-radius:9px;background:#0d6947;color:white;font-weight:800;font-size:13px}.search-submit span{margin-left:5px;font-size:16px}.search-submit:hover{background:#095a3c}.suggestions{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:15px}.suggestions span{font-size:11px;color:#b5dec6;margin-right:6px}.suggestions button{color:#e9faef;background:rgba(255,255,255,.105);border:1px solid rgba(255,255,255,.16);padding:6px 10px;border-radius:999px;font-size:11px}.suggestions button:hover{background:rgba(255,255,255,.22)}.layout{display:grid;grid-template-columns:220px minmax(0,1fr) 236px;gap:27px;margin-top:35px}.sidebar-panel{border:1px solid var(--line);background:var(--card);border-radius:14px;padding:17px 11px 14px}.section-label{color:var(--green);letter-spacing:1.25px;font-size:10px;font-weight:800}.sidebar-panel>.section-label{padding:0 12px;margin:1px 0 12px;color:var(--muted)}.categories{display:flex;flex-direction:column;gap:2px}.cat-btn,.sidebar-special{display:flex;width:100%;align-items:center;text-align:left;gap:11px;background:transparent;color:var(--sub);border-radius:9px;padding:10px 12px;font-weight:600;font-size:13px;letter-spacing:-.3px}.cat-btn:hover,.sidebar-special:hover{background:var(--soft);color:var(--deep)}.cat-btn.active,.sidebar-special.active{background:var(--soft);color:var(--green);font-weight:850}.cat-symbol{width:22px;font-size:17px;font-weight:700;text-align:center}.cat-count,.small-count{margin-left:auto;font-size:10px;color:var(--muted);font-weight:500}.sidebar-divider{height:1px;background:var(--line);margin:12px 9px}.sidebar-special span:first-child{font-size:21px;color:#b08733}.privacy-small{display:flex;gap:12px;padding:20px 12px;color:var(--sub);font-size:11px}.privacy-small>span{font-size:22px;color:#26a777}.privacy-small strong{font-size:12px;color:var(--ink)}.privacy-small p{line-height:1.8;margin:5px 0 0}.content{min-width:0;scroll-margin-top:25px}.content-head{display:flex;justify-content:space-between;align-items:flex-end;gap:10px;margin:2px 0 18px}.content-head h2{font-size:23px;line-height:1.3;letter-spacing:-1px;margin:3px 0 5px}.content-head p{margin:0;font-size:12px;color:var(--muted)}.version-picker{display:flex;flex-direction:column;gap:5px;color:var(--muted);font-size:10px;font-weight:700;white-space:nowrap}.version-picker select{border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);padding:7px 10px;font-size:12px}.popular-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.popular-card{display:flex;flex-direction:column;align-items:flex-start;text-align:left;gap:5px;min-height:168px;background:var(--card);border:1px solid var(--line);padding:21px;border-radius:13px;transition:transform .12s ease,border-color .12s ease;box-shadow:var(--shadow)}.popular-card:hover{transform:translateY(-2px);border-color:#99d5b3}.popular-glyph{display:grid;place-items:center;border-radius:8px;width:35px;height:35px;background:var(--soft);color:var(--green);font-size:17px;font-weight:900;margin-bottom:5px}.popular-name{font-weight:850;font-size:14px;letter-spacing:-.4px}.popular-desc{font-size:11px;color:var(--muted);line-height:1.55;min-height:32px}.popular-go{font-size:11px;color:var(--green);font-weight:750;margin-top:auto}.quick-box,.small-box{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:20px;box-shadow:var(--shadow)}.tip-icon{display:grid;place-items:center;margin:13px 0 5px;width:41px;height:41px;font-size:23px;background:var(--soft);border-radius:10px;color:var(--green)}.quick-box h3,.small-box h3{font-size:15px;letter-spacing:-.5px;margin:10px 0 14px}.shortcut{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:11px 0;border-bottom:1px solid var(--line);font-size:11px;color:var(--sub)}.shortcut:last-child{border-bottom:0}.shortcut kbd{color:var(--deep);padding:4px 7px;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;background:var(--bg);font-size:10px;white-space:nowrap}.small-box{margin-top:14px}.small-box h3{margin:0 0 8px}.small-box p{color:var(--sub);font-size:12px;margin:0 0 15px}.small-box p strong{font-size:17px;color:var(--green)}.small-box button{color:var(--green);font-weight:800;background:var(--soft);width:100%;padding:11px;border-radius:8px;font-size:12px}.result-list{display:flex;flex-direction:column;gap:9px}.result-row{width:100%;display:flex;align-items:center;text-align:left;gap:13px;background:var(--card);border:1px solid var(--line);padding:15px 17px;border-radius:11px;color:var(--ink)}.result-row:hover{border-color:#9ad2b6;background:var(--soft)}.item-emblem{background:var(--soft);color:var(--green);border-radius:8px;width:39px;height:39px;flex-shrink:0;display:grid;place-items:center;font-weight:850;font-size:17px}.result-body{display:flex;flex-direction:column;gap:3px;min-width:0;flex:1}.result-name{font-weight:850;font-size:14px}.result-desc{font-size:12px;color:var(--sub);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.result-tags{font-size:10px;color:var(--green);font-weight:700}.result-arrow{color:var(--green);font-size:17px}.answer-card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:25px 28px 22px;box-shadow:var(--shadow)}.answer-card[hidden]{display:none}.answer-top{display:flex;gap:14px;align-items:center}.answer-icon{display:grid;place-items:center;width:47px;height:47px;background:var(--soft);color:var(--green);font-weight:900;font-size:20px;border-radius:11px;flex-shrink:0}.answer-meta{flex:1;min-width:0}.answer-kicker{color:var(--green);font-size:11px;font-weight:850}.answer-kicker span{color:var(--muted);font-weight:600}.answer-meta h3{margin:3px 0 0;line-height:1.3;letter-spacing:-.7px;font-size:21px;word-break:keep-all}.bookmark{font-size:26px;color:#a48c59;background:transparent;padding:4px 7px;align-self:flex-start}.bookmark.marked{color:#e6b44a}.answer-intro{font-size:14px;color:var(--sub);margin:19px 0 21px;line-height:1.85}.answer-section{border-top:1px solid var(--line);padding:17px 0 6px}.answer-section h4{font-size:13px;letter-spacing:-.2px;margin:0 0 12px}.steps{counter-reset:steps;list-style:none;padding:0;margin:0 0 12px}.steps li{counter-increment:steps;position:relative;padding:0 0 13px 30px;font-size:13px;color:var(--sub)}.steps li:before{content:counter(steps);position:absolute;left:0;top:1px;background:var(--soft);color:var(--green);border-radius:50%;font-size:10px;display:grid;place-items:center;width:21px;height:21px;font-weight:800}.formula-row{background:var(--bg);border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 10px 9px 14px;margin-bottom:8px;min-height:44px}.formula-row code{font-size:13px;color:var(--green);font-family:Consolas,Menlo,monospace;overflow-x:auto;white-space:nowrap;flex:1;scrollbar-width:thin}.copy-btn{color:var(--green);font-size:11px;font-weight:800;background:var(--card);border:1px solid var(--line);border-radius:6px;padding:6px 8px;flex-shrink:0}.copy-btn:hover{border-color:#84d6ad}.micro-note{font-size:11px;color:var(--muted);margin:3px 0 10px}.tip-section p{font-size:12px;color:var(--sub);margin:0 0 8px;line-height:1.8}.answer-actions{display:flex;align-items:center;gap:15px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:12px;padding-top:17px}.source-link{font-size:12px;font-weight:850;color:var(--green)}.plain-action{background:transparent;color:var(--sub);font-size:11px}.plain-action:hover{color:var(--green)}.warning{padding:12px 13px;background:var(--warn);color:var(--warn-ink);font-size:12px;border-radius:8px;margin-top:15px;line-height:1.7}.warning.subdued{background:var(--soft);color:var(--sub)}.notice{background:var(--soft);color:var(--deep);padding:12px 14px;border-radius:9px;margin-bottom:15px;font-size:12px;line-height:1.8}.notice.warning{background:var(--warn);color:var(--warn-ink)}.notice[hidden]{display:none}.related-title{font-size:14px;letter-spacing:-.4px;margin:25px 0 10px}.related .result-row{padding:13px}.related .item-emblem{width:32px;height:32px;font-size:15px}.more-button{display:block;width:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px;color:var(--green);font-weight:800;margin-top:12px;font-size:12px}.more-button[hidden]{display:none}.empty{background:var(--card);border:1px solid var(--line);padding:30px 25px;text-align:center;border-radius:14px}.empty-symbol{font-size:35px;color:var(--green)}.empty h3{margin:6px 0;font-size:17px}.empty p{color:var(--sub);font-size:12px}.empty-examples{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:17px}.empty-examples button{background:var(--soft);border-radius:7px;color:var(--green);padding:8px 11px;font-size:12px}.about-section{background:var(--card);border:1px solid var(--line);border-radius:17px;margin-top:42px;display:flex;justify-content:space-between;align-items:center;gap:30px;padding:29px 33px}.about-section>div:first-child{max-width:630px}.about-section h2{font-size:21px;letter-spacing:-.7px;margin:7px 0}.about-section p{font-size:12px;color:var(--sub);line-height:1.9;margin:0}.about-stats{display:flex;gap:18px}.about-stats div{display:flex;flex-direction:column;align-items:center;min-width:80px}.about-stats strong{font-size:27px;color:var(--green);line-height:1.3}.about-stats span{font-size:11px;color:var(--muted);white-space:nowrap}.footer{max-width:1380px;margin:auto;padding:22px 44px 37px;color:var(--muted);font-size:10px;display:flex;gap:20px;justify-content:space-between;flex-wrap:wrap}.footer a{color:var(--green);font-weight:700}.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,25px);background:#183b2c;color:#f1fff5;padding:12px 20px;border-radius:9px;font-size:12px;opacity:0;transition:opacity .17s,transform .17s;pointer-events:none;box-shadow:0 12px 25px rgba(0,0,0,.2);z-index:99}.toast.visible{opacity:1;transform:translate(-50%,0)}
@media(max-width:1100px){.layout{grid-template-columns:200px minmax(0,1fr)}.right-panel{display:none}.header-inner,.page,.footer{padding-left:30px;padding-right:30px}.hero-content{padding-left:40px}}
@media(max-width:720px){.header-inner{height:68px}.header-inner,.page,.footer{padding-left:17px;padding-right:17px}.brand-words strong{font-size:18px}.status{display:none}.page{padding-top:16px}.hero{border-radius:17px;min-height:305px}.hero-content{padding:30px 20px 25px}.hero h1{font-size:27px;letter-spacing:-1.2px}.hero-desc{font-size:12px;line-height:1.7}.search-form{height:57px;padding:5px 5px 5px 12px;gap:8px}.search-icon svg{width:17px}.search-form input{font-size:13px}.search-submit{height:45px;padding:0 11px;font-size:11px}.suggestions{gap:6px}.suggestions span{width:100%}.suggestions button{font-size:10px}.layout{display:block;margin-top:22px}.sidebar{margin-bottom:23px}.sidebar-panel{padding:11px}.sidebar-panel>.section-label,.sidebar-divider,.sidebar-special,.privacy-small{display:none}.categories{flex-direction:row;overflow-x:auto;scrollbar-width:none;padding-bottom:3px}.cat-btn{flex-shrink:0;width:auto;border:1px solid var(--line);padding:8px 11px;gap:6px;font-size:11px}.cat-btn .cat-count{display:none}.cat-symbol{width:auto;font-size:14px}.content-head{align-items:center}.content-head h2{font-size:20px}.popular-grid{gap:9px}.popular-card{padding:15px;min-height:165px}.popular-name{font-size:12px}.popular-desc{font-size:10px}.answer-card{padding:20px 17px}.answer-meta h3{font-size:18px}.about-section{display:block;padding:24px 20px;margin-top:30px}.about-stats{margin-top:22px;justify-content:space-between}.footer{font-size:9px}.header-right{gap:6px}.about-btn{padding:8px;font-size:11px}}
@media(max-width:390px){.search-submit span{display:none}.search-submit{padding:0 7px}.hero h1{font-size:24px}.popular-grid{grid-template-columns:1fr}.popular-card{min-height:145px}.version-picker{font-size:9px}.version-picker select{max-width:119px}}
@media print{.header,.hero,.sidebar,.right-panel,.result-list,.related,.about-section,.footer,.answer-actions,.bookmark,.content-head,.more-button,.notice{display:none!important}.layout{display:block;margin:0}.page{padding:0}.answer-card{border:0;box-shadow:none}.content{width:100%}body{background:white;color:#111}}

/* v1.1.0: 실습 예시 테이블 */
.visual-lead{font-size:12px;color:var(--sub);margin:-4px 0 12px}.visual-scroll{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:10px}.example-table{border-collapse:collapse;width:100%;min-width:320px;font-size:12px;text-align:left}.example-table th{background:var(--soft);color:var(--deep);font-weight:800}.example-table td,.example-table th{padding:10px 12px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);white-space:nowrap}.example-table tr:last-child td{border-bottom:0}.example-table td:last-child,.example-table th:last-child{border-right:0}.visual-formula{display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:var(--bg);padding:12px;margin-top:11px;border-radius:8px;border:1px solid var(--line)}.visual-formula span{font-size:11px;color:var(--sub);font-weight:750}.visual-formula code{font:12px Consolas,Menlo,monospace;color:var(--green);overflow-wrap:anywhere;flex:1;min-width:145px}.visual-outcome{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;background:var(--soft);border-radius:8px;margin-top:9px;font-size:13px;flex-wrap:wrap}.visual-outcome strong{color:var(--deep)}.visual-outcome span{color:var(--green);font-weight:850}.visual-explain{font-size:12px;line-height:1.9;color:var(--sub);margin:12px 0 7px}

/* v1.2: 엑셀 행·열 머리글 및 실무 도구 */
.example-table.excel-grid{border-collapse:separate;border-spacing:0;min-width:420px;table-layout:auto}
.excel-grid .excel-corner,.excel-grid .excel-row-index,.excel-grid .excel-column{background:var(--soft);color:var(--deep);text-align:center;font-size:11px;font-weight:800}
.excel-grid .excel-row-index{width:44px;min-width:44px;position:sticky;left:0;z-index:1;border-right:2px solid var(--line)}
.excel-grid .excel-corner{position:sticky;left:0;z-index:2;width:44px;min-width:44px;border-right:2px solid var(--line)}
.excel-grid .excel-column{border-bottom:2px solid var(--line)}
.excel-grid .excel-header{background:var(--card);font-weight:850;white-space:normal;min-width:100px}
.tool-panel h3{font-size:20px;margin:0 0 12px}.tool-intro{color:var(--sub);font-size:13px;line-height:1.75}.tool-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:18px 0}.tool-fields label{display:grid;gap:6px;color:var(--sub);font-size:12px;font-weight:700}.tool-fields .wide{grid-column:1/-1}.tool-fields input,.tool-fields select,.tool-fields textarea,.file-input input{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:11px 12px;min-width:0;width:100%}.tool-fields textarea{resize:vertical}.action-primary,.action-secondary{padding:11px 15px;border:1px solid var(--green);border-radius:9px;font-size:13px;font-weight:750;cursor:pointer}.action-primary{background:var(--green);color:var(--card)}.action-secondary{background:var(--card);color:var(--green)}.tool-buttons{display:flex;flex-wrap:wrap;gap:9px}.tool-result{margin:15px 0}.file-input{display:block;background:var(--soft);border-radius:10px;padding:16px;margin:15px 0;font-size:12px;font-weight:700}.file-input input{margin-top:9px}.sidebar-special{cursor:pointer}
@media(max-width:720px){#openFormulaBuilder,#openCSV,#openCustom{display:flex}.sidebar-panel{display:flex;flex-wrap:wrap;gap:5px}.sidebar-panel .categories{width:100%}.tool-fields{grid-template-columns:1fr}.tool-panel{padding:17px}.tool-buttons button{flex:1 1 100%}}
@media print{.tool-panel{display:none!important}}

/* v1.2.1: 질문 조건 표시와 검색 맥락 안내 */
.question-context{display:flex;flex-wrap:wrap;align-items:center;gap:10px;background:#e5f4ea;color:#0d5739;border:1px solid #9bceb3;border-radius:10px;padding:10px 12px;margin:10px 0;font-size:13px}
.question-context strong{font-weight:800}
.question-context span{font-weight:650}
[data-theme="dark"] .question-context{background:#163a2d;color:#c5f0d5;border-color:#2c7956}
.header .status strong{font-size:11px;padding-left:5px;color:inherit}
/* v1.4: '저장한 도움말'을 모바일에서 숨기던 규칙 수정 */
@media(max-width:720px){#showSaved{display:flex}.sidebar-panel{align-items:stretch}.sidebar-panel .sidebar-special{flex:1 1 auto;min-width:calc(50% - 6px);font-size:12px;padding:9px 10px}.sidebar-panel .sidebar-special span:first-child{font-size:16px}}