:root{--bg:#f6f7fb;--surface:#fff;--surface2:#f8fafc;--text:#111827;--muted:#667085;--line:#e5e7eb;--primary:#2457e6;--primary2:#1845c8;--soft:#eef3ff;--success:#067647;--danger:#b42318;--shadow:0 16px 45px rgba(15,23,42,.08);--radius:18px;--header:64px}
html[data-theme=dark]{--bg:#0b1020;--surface:#121a2d;--surface2:#172036;--text:#eef2ff;--muted:#a7b0c5;--line:#2a3550;--primary:#7ca1ff;--primary2:#9ab6ff;--soft:#1b2a4d;--success:#5ee2a0;--danger:#ff8b86;--shadow:0 18px 50px rgba(0,0,0,.28)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:var(--bg);font-family:Inter,Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans","Noto Sans KR",Arial,sans-serif;line-height:1.65}button,input,textarea,select{font:inherit}button,select{color:inherit}a{color:inherit}.container{width:min(1160px,calc(100% - 28px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;height:var(--header);background:color-mix(in srgb,var(--surface) 90%,transparent);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.header-inner{height:100%;display:flex;align-items:center;gap:20px}.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-weight:850;letter-spacing:-.025em;white-space:nowrap}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;color:#fff;background:linear-gradient(135deg,#2457e6,#6d42dc);font-size:15px;box-shadow:0 8px 20px rgba(36,87,230,.25)}.main-nav{display:flex;gap:18px;margin-left:auto}.main-nav a{text-decoration:none;color:var(--muted);font-size:14px;font-weight:700}.main-nav a:hover{color:var(--text)}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.language-select{min-height:38px;border:1px solid var(--line);background:var(--surface);border-radius:10px;cursor:pointer}.icon-button{width:40px;display:grid;place-items:center}.language-select{max-width:158px;padding:0 12px}
main{min-height:calc(100vh - var(--header))}.tool-section{padding:18px 0 34px}.tool-shell{background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.tool-heading{display:flex;align-items:end;justify-content:space-between;gap:18px;padding:20px 24px 12px}.tool-heading h1{margin:0;font-size:clamp(25px,4vw,38px);letter-spacing:-.045em;line-height:1.12}.tool-heading p{margin:6px 0 0;color:var(--muted);font-size:14px}.locale-status{color:var(--muted);font-size:12px;white-space:nowrap}.locale-status strong{color:var(--success)}
.primary-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;padding:0 24px 14px}.primary-stat{min-height:106px;padding:14px 16px;background:var(--surface2);border:1px solid var(--line);border-radius:14px}.primary-stat:first-child{background:var(--soft);border-color:color-mix(in srgb,var(--primary) 35%,var(--line))}.primary-stat-label{display:block;color:var(--muted);font-size:12px;font-weight:750}.primary-stat strong{display:block;margin-top:2px;font-size:clamp(29px,5vw,44px);line-height:1.1;letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.editor-wrap{padding:0 24px 18px}.editor-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:9px}.target-control{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;font-weight:700}.target-control input{width:108px;height:38px;padding:0 10px;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:9px;text-align:right}.action-row{display:flex;flex-wrap:wrap;gap:7px}.btn{min-height:38px;padding:0 13px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--text);font-weight:760;font-size:13px;cursor:pointer;transition:transform .12s,border-color .12s}.btn:hover{transform:translateY(-1px);border-color:var(--primary)}.btn-primary{color:#fff;background:var(--primary);border-color:var(--primary)}.btn-danger{color:var(--danger)}.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}
#textInput{width:100%;min-height:335px;max-height:70vh;resize:vertical;padding:18px;color:var(--text);background:var(--surface2);border:1px solid var(--line);border-radius:14px;outline:none;font-size:16px;line-height:1.72;caret-color:var(--primary)}#textInput:focus{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 14%,transparent)}#textInput::placeholder{color:color-mix(in srgb,var(--muted) 75%,transparent)}
.limit-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;margin-top:9px}.progress{height:8px;overflow:hidden;background:var(--surface2);border:1px solid var(--line);border-radius:999px}.progress span{display:block;width:0;height:100%;background:var(--primary);transition:width .15s}.limit-copy{color:var(--muted);font-size:12px;white-space:nowrap;font-variant-numeric:tabular-nums}.limit-copy.over{color:var(--danger);font-weight:800}.privacy-strip{display:flex;align-items:center;gap:8px;padding:11px 24px;color:var(--muted);background:var(--surface2);border-top:1px solid var(--line);font-size:12px}.privacy-strip svg{flex:none;color:var(--success)}
.stats-and-tools{display:grid;grid-template-columns:1.15fr .85fr;gap:16px;margin-top:18px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 26px rgba(15,23,42,.04)}.panel-header{padding:17px 19px;border-bottom:1px solid var(--line)}.panel-header h2{margin:0;font-size:18px;letter-spacing:-.02em}.detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}.detail-stat{padding:16px;background:var(--surface);min-height:93px}.detail-stat span{color:var(--muted);font-size:12px;font-weight:700}.detail-stat strong{display:block;margin-top:4px;font-size:22px;font-variant-numeric:tabular-nums}.tool-buttons{display:grid;grid-template-columns:1fr 1fr;gap:9px;padding:16px}.tool-buttons .btn{min-height:44px;text-align:left}.keyword-list{margin:0;padding:0;list-style:none}.keyword-list li{display:grid;grid-template-columns:minmax(0,1fr) auto 90px;align-items:center;gap:10px;padding:11px 18px;border-top:1px solid var(--line)}.keyword-word{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:700}.keyword-count{color:var(--muted);font-size:12px}.keyword-bar{height:7px;overflow:hidden;background:var(--surface2);border-radius:999px}.keyword-bar span{display:block;height:100%;background:var(--primary);border-radius:inherit}.empty-state{padding:26px 18px;color:var(--muted);font-size:14px}
.content-section{padding:42px 0}.content-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.content-card{padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.content-card h2{margin:0 0 10px;font-size:27px;letter-spacing:-.035em}.content-card h3{margin:24px 0 7px;font-size:18px}.content-card p{margin:0 0 13px;color:var(--muted)}.content-card ul{color:var(--muted);padding-left:20px}.faq details{border-top:1px solid var(--line)}.faq details:first-of-type{border-top:0}.faq summary{padding:16px 0;cursor:pointer;font-weight:780}.faq details p{padding-bottom:16px;margin:0}.related-section{padding:0 0 56px}.related-section h2{font-size:25px;letter-spacing:-.03em}.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.guide-card{display:flex;min-height:155px;flex-direction:column;padding:18px;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:14px}.guide-card:hover{border-color:var(--primary)}.guide-card strong{font-size:17px}.guide-card p{color:var(--muted);font-size:13px}.guide-card span{margin-top:auto;color:var(--primary);font-size:13px;font-weight:800}
.site-footer{padding:28px 0;color:var(--muted);background:var(--surface);border-top:1px solid var(--line)}.footer-grid{display:flex;justify-content:space-between;gap:24px}.footer-links{display:flex;flex-wrap:wrap;gap:14px}.footer-links a{font-size:13px}.toast{position:fixed;left:50%;bottom:24px;z-index:100;transform:translate(-50%,20px);padding:11px 16px;color:#fff;background:rgba(17,24,39,.94);border-radius:10px;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}
.article-hero{padding:52px 0 22px}.article-hero h1{max-width:850px;margin:0;font-size:clamp(34px,6vw,58px);line-height:1.1;letter-spacing:-.05em}.article-hero p{max-width:760px;color:var(--muted);font-size:18px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 260px;gap:34px;align-items:start;padding-bottom:60px}.article-body{padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.article-body h2{margin-top:34px;font-size:26px;letter-spacing:-.03em}.article-body h2:first-child{margin-top:0}.article-body h3{margin-top:25px}.article-body p,.article-body li{color:var(--muted)}.article-body table{width:100%;border-collapse:collapse;margin:18px 0}.article-body th,.article-body td{padding:11px;border:1px solid var(--line);text-align:left}.article-body th{background:var(--surface2)}.toc{position:sticky;top:86px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:14px}.toc strong{display:block;margin-bottom:9px}.toc a{display:block;padding:5px 0;color:var(--muted);font-size:13px}.bilingual-note{padding:12px 14px;margin-bottom:18px;background:var(--soft);border-radius:10px;color:var(--muted);font-size:13px}.legal-meta{color:var(--muted);font-size:13px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;padding:10px 14px;color:#fff;background:var(--primary);border-radius:8px}.skip-link:focus{top:10px}[dir=rtl] .main-nav{margin-left:0;margin-right:auto}[dir=rtl] .tool-buttons .btn,[dir=rtl] .article-body th,[dir=rtl] .article-body td{text-align:right}
@media(max-width:930px){.main-nav{display:none}.header-actions{margin-left:auto}[dir=rtl] .header-actions{margin-left:0;margin-right:auto}.primary-stats{grid-template-columns:repeat(2,1fr)}.stats-and-tools,.content-grid,.article-layout{grid-template-columns:1fr}.toc{position:static}.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){:root{--header:58px}.container{width:min(100% - 18px,1160px)}.brand span:last-child{display:none}.language-select{max-width:122px}.tool-section{padding-top:10px}.tool-heading{align-items:flex-start;padding:16px 14px 10px}.locale-status{display:none}.primary-stats{gap:7px;padding:0 14px 12px}.primary-stat{min-height:91px;padding:12px}.primary-stat strong{font-size:30px}.editor-wrap{padding:0 14px 14px}.editor-toolbar{align-items:stretch;flex-direction:column}.action-row .btn{flex:1}#textInput{min-height:310px;padding:14px}.privacy-strip{padding:10px 14px}.detail-grid{grid-template-columns:repeat(2,1fr)}.tool-buttons{grid-template-columns:1fr}.keyword-list li{grid-template-columns:minmax(0,1fr) auto 60px}.content-card{padding:20px}.card-grid{grid-template-columns:1fr}.footer-grid{flex-direction:column}.article-hero{padding-top:34px}.article-body{padding:20px}}

.performance-notice{
  margin:10px 0 0;
  padding:10px 12px;
  border:1px solid #f0c36d;
  border-radius:10px;
  background:#fff8e6;
  color:#795500;
  font-size:13px;
  font-weight:700;
}
[data-theme="dark"] .performance-notice{
  background:#302712;
  border-color:#6f571b;
  color:#f4d77b;
}

.goal-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.preset-row{display:flex;gap:6px;flex-wrap:wrap}.chip{min-height:32px;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface2);color:var(--muted);cursor:pointer;font-size:12px;font-weight:750}.chip:hover{border-color:var(--primary);color:var(--text)}
.file-button{display:inline-flex;align-items:center}.save-toggle{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;font-weight:700;white-space:nowrap}.save-toggle input{accent-color:var(--primary)}
.tool-buttons-dense{grid-template-columns:repeat(2,minmax(0,1fr));max-height:340px;overflow:auto}
.find-panel,.keyword-panel{margin-top:16px}.find-grid{display:grid;grid-template-columns:1fr 1fr auto auto;align-items:end;gap:10px;padding:16px}.find-grid label:not(.check-row){display:grid;gap:5px;color:var(--muted);font-size:12px;font-weight:750}.find-grid input[type=text]{height:40px;padding:0 11px;color:var(--text);background:var(--surface2);border:1px solid var(--line);border-radius:9px}.check-row{height:40px;display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;font-weight:700}.find-actions{height:40px;display:flex;align-items:center;gap:10px}.muted-note{color:var(--muted);font-size:12px;white-space:nowrap}
.article-hero.compact-hero{padding-bottom:26px}.tool-page-section{padding:0 0 52px}.mini-tool-shell{margin-bottom:16px}.tool-input{width:100%;min-height:300px;resize:vertical;padding:16px;color:var(--text);background:var(--surface2);border:1px solid var(--line);border-radius:13px;outline:none;line-height:1.7}.tool-input:focus{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 14%,transparent)}.mini-actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:16px 0}.metric-card{padding:16px;background:var(--surface)}.metric-card span{display:block;color:var(--muted);font-size:12px;font-weight:700}.metric-card strong{display:block;margin-top:4px;font-size:24px;overflow-wrap:anywhere}.mini-keywords{margin-top:16px}.speed-controls{display:flex;gap:16px;flex-wrap:wrap;padding:16px 24px 0}.speed-controls label{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;font-weight:700}.speed-controls input{width:92px;height:38px;padding:0 9px;color:var(--text);background:var(--surface2);border:1px solid var(--line);border-radius:9px}
.dual-editor{display:grid;grid-template-columns:1fr 1fr;gap:16px}.dual-editor .tool-shell{margin:0}.clean-options{margin:16px 0}.diff-panel{margin-top:16px}.diff-output{margin:0;padding:18px;min-height:220px;max-height:520px;overflow:auto;color:var(--text);background:var(--surface2);white-space:pre-wrap;word-break:break-word}.tool-article{margin-top:24px}.back-tools{margin-top:16px}.directory-copy{margin-top:24px}.tool-directory{grid-template-columns:repeat(3,1fr)}.noscript{padding:16px;text-align:center}.eyebrow{color:var(--primary);font-size:13px;font-weight:850;text-transform:uppercase;letter-spacing:.08em}
@media(max-width:930px){.find-grid{grid-template-columns:1fr 1fr}.dual-editor{grid-template-columns:1fr}.tool-directory{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.goal-row{align-items:stretch}.preset-row{width:100%}.editor-toolbar{gap:9px}.save-toggle{white-space:normal}.find-grid{grid-template-columns:1fr}.find-actions{justify-content:space-between}.metric-grid{grid-template-columns:repeat(2,1fr)}.tool-directory{grid-template-columns:1fr}.tool-buttons-dense{grid-template-columns:1fr}.speed-controls{padding:14px}}