:root{
  --bg:#f7f8fa;--card:#fff;--text:#191f28;--sub:#4e5968;--muted:#6b7684;--line:#e8ebed;
  --blue:#3182f6;--blue-d:#1b64da;--blue-weak:#eef5ff;--blue-mid:#c9defc;--red:#e5384a;--ok:#1b64da;
  --r:20px;--shadow:0 1px 2px rgba(17,24,39,.04),0 8px 24px rgba(17,24,39,.06)
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;line-height:1.7;font-size:16px;letter-spacing:-.01em;word-break:keep-all;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
img,svg{max-width:100%}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}

/* header */
header.site{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text);text-decoration:none;letter-spacing:-.02em}
.logo i{width:32px;height:32px;border-radius:10px;background:var(--blue);display:grid;place-items:center}
header.site nav{display:flex;gap:4px}
header.site nav a{color:var(--sub);text-decoration:none;font-size:15px;font-weight:500;padding:8px 12px;border-radius:10px}
header.site nav a:hover,header.site nav a[aria-current]{background:var(--bg);color:var(--text)}

/* hero */
.hero{background:linear-gradient(180deg,#fff 0%,#f3f8ff 100%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding-top:72px;padding-bottom:72px}
.eyebrow{display:inline-block;font-size:14px;font-weight:700;color:var(--blue);background:var(--blue-weak);padding:6px 12px;border-radius:999px;margin-bottom:16px}
.hero h1{font-size:44px;line-height:1.25;letter-spacing:-.035em;margin:0 0 16px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero p.lead{font-size:18px;color:var(--sub);margin:0 0 28px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.chips li{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:14px;font-weight:600;color:var(--sub)}
.chips svg{flex:none}
.hero-art{display:flex;justify-content:center}

/* sections */
section.block{padding:72px 0}
section.block.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:32px}
.sec-head h2{font-size:30px;line-height:1.3;letter-spacing:-.03em;margin:0 0 8px;font-weight:800}
.sec-head p{color:var(--sub);margin:0;font-size:17px}

/* tool cards */
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.tool{position:relative;display:flex;flex-direction:column;gap:12px;background:#fff;border-radius:var(--r);padding:28px;color:var(--text);text-decoration:none;box-shadow:var(--shadow);border:1px solid transparent;transition:transform .15s,border-color .15s}
.tool:hover{transform:translateY(-2px);border-color:var(--blue-mid)}
.tool .ico{width:56px;height:56px;border-radius:16px;background:var(--blue-weak);display:grid;place-items:center}
.tool b{font-size:20px;letter-spacing:-.02em}
.tool p{margin:0;color:var(--sub);font-size:15px}
.tool .go{margin-top:auto;font-weight:700;color:var(--blue);font-size:15px}
.tool.soon{cursor:default}.tool.soon:hover{transform:none;border-color:transparent}
.tool.soon .ico{background:var(--bg)}
.tool .badge{position:absolute;top:24px;right:24px;font-size:12px;font-weight:700;color:var(--muted);background:var(--bg);padding:4px 10px;border-radius:999px}

/* how it works */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.flow .step{background:var(--bg);border-radius:var(--r);padding:28px}
.flow .num{width:32px;height:32px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;display:grid;place-items:center;font-size:15px;margin-bottom:16px}
.flow h3{margin:0 0 6px;font-size:18px}
.flow p{margin:0;color:var(--sub);font-size:15px}
.compare{margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.compare .box{border-radius:var(--r);padding:24px;border:1px solid var(--line);background:#fff}
.compare .box.good{border-color:var(--blue-mid);background:var(--blue-weak)}
.compare h4{margin:0 0 12px;font-size:16px}
.compare svg{display:block;margin:0 auto 8px}

/* page head (tool pages) */
.page-head{background:linear-gradient(180deg,#fff 0%,#f3f8ff 100%);border-bottom:1px solid var(--line)}
.page-head .wrap{padding-top:40px;padding-bottom:40px}
.crumb{font-size:14px;color:var(--muted);margin-bottom:12px}.crumb a{color:var(--muted);text-decoration:none}
.page-head h1{font-size:36px;line-height:1.25;letter-spacing:-.035em;margin:0 0 10px;font-weight:800}
.page-head p{margin:0;color:var(--sub);font-size:17px}
.page-head .chips{margin-top:20px}

/* tool widget */
.tool-area{margin-top:-1px;padding:32px 0 8px}
.panel{background:#fff;border-radius:24px;box-shadow:var(--shadow);padding:28px}
.drop{display:flex;flex-direction:column;align-items:center;gap:8px;border:2px dashed var(--blue-mid);border-radius:18px;padding:44px 20px;text-align:center;cursor:pointer;background:#fbfdff;transition:.15s}
.drop:hover,.drop.over{border-color:var(--blue);background:var(--blue-weak)}
.drop b{font-size:18px}
.drop span{color:var(--muted);font-size:14px}
.drop .pick{margin-top:8px;background:var(--blue);color:#fff;font-weight:700;border-radius:12px;padding:10px 18px;font-size:15px}
ul.files{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
ul.files li{display:flex;align-items:center;gap:12px;padding:12px 12px 12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff}
ul.files .fi{flex:none;width:36px;height:44px;border-radius:6px;background:#fff1f1;color:#d92d3f;font-size:10px;font-weight:800;display:grid;place-items:center;border:1px solid #ffd9dc}
ul.files .txt{flex:1;min-width:0}
ul.files .name{display:block;font-weight:600;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
ul.files .meta{display:block;color:var(--muted);font-size:13px}
.icon-btn{border:0;background:var(--bg);border-radius:10px;width:36px;height:36px;cursor:pointer;color:var(--sub);display:grid;place-items:center;flex:none}
.icon-btn:hover{background:#e9edf1}
.icon-btn:disabled{opacity:.3;cursor:default}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:16px 28px;font-size:17px;font-weight:700;cursor:pointer;font-family:inherit;text-decoration:none}
.btn.primary{background:var(--blue);color:#fff}.btn.primary:hover{background:var(--blue-d)}
.btn.primary:disabled{background:#b7cff5;cursor:not-allowed}
.btn.ghost{background:var(--bg);color:var(--sub);padding:16px 20px}
.summary{margin-left:auto;color:var(--muted);font-size:14px}
.msg{margin-top:14px;font-size:15px;min-height:1.5em;font-weight:600}.msg.err{color:var(--red)}.msg.ok{color:var(--ok)}
.safe{display:flex;gap:12px;align-items:flex-start;margin-top:16px;padding:16px 18px;border-radius:16px;background:var(--blue-weak);color:var(--sub);font-size:15px}
.safe svg{flex:none;margin-top:2px}
.ad-slot{min-height:120px;margin:40px 0 0}

/* article */
article.doc{padding:24px 0 72px}
article.doc h2{font-size:26px;letter-spacing:-.03em;margin:56px 0 16px;font-weight:800}
article.doc h2:first-child{margin-top:32px}
article.doc p,article.doc li{color:#333d4b}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.steps-grid .s{background:#fff;border-radius:18px;padding:22px;border:1px solid var(--line)}
.steps-grid .s .num{width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;font-size:14px;display:grid;place-items:center;margin-bottom:12px}
.steps-grid .s b{display:block;font-size:17px;margin-bottom:4px}
.steps-grid .s p{margin:0;font-size:15px;color:var(--sub)}
.uses{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:0;list-style:none}
.uses li{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;font-size:15px}
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
th,td{border-bottom:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}
tr:last-child td{border-bottom:0}
th{color:var(--sub);font-weight:700;background:#fafbfc}
td.hl{color:var(--blue);font-weight:700}
details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:0 0 8px}
summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";color:var(--muted);font-weight:400;font-size:20px;line-height:1}
details[open] summary:after{content:"−"}
details p{margin:10px 0 0;color:var(--sub)}
.plain h1{font-size:34px;letter-spacing:-.03em;margin:48px 0 16px}
.plain h2{font-size:22px;margin:40px 0 12px}
.plain .card{background:#fff;border-radius:18px;padding:22px;border:1px solid var(--line)}

/* footer */
footer.site{background:#fff;border-top:1px solid var(--line);padding:40px 0 48px;color:var(--muted);font-size:14px}
footer.site .row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer.site nav a{color:var(--sub);text-decoration:none;margin-right:20px;font-weight:500}
footer.site p{margin:12px 0 0}

@media (max-width:840px){
  .hero .wrap{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px;gap:24px}
  .hero-art{order:-1}.hero-art svg{width:260px;height:auto}
  .hero h1{font-size:34px}
  .flow,.steps-grid{grid-template-columns:1fr}
  .compare,.uses{grid-template-columns:1fr}
}
@media (max-width:560px){
  .wrap{padding:0 16px}
  header.site nav a{padding:8px 8px;font-size:14px}
  .hero h1{font-size:30px}.hero p.lead{font-size:16px}
  .page-head h1{font-size:28px}
  .sec-head h2{font-size:24px}
  section.block{padding:48px 0}
  .panel{padding:18px;border-radius:20px}
  .drop{padding:32px 16px}
  .btn.primary{flex:1}
  .summary{width:100%;margin:0;order:3}
  .tools{grid-template-columns:1fr}
}
.logo .tld{color:var(--blue);margin-left:-10px}

/* v3 */
header.site nav .m{display:none}
@media (max-width:960px){header.site nav .t{display:none}header.site nav .m{display:block}}
ul.files .th{flex:none;width:44px;height:44px;border-radius:10px;object-fit:cover;background:var(--bg);border:1px solid var(--line)}
ul.files .meta b{color:var(--text)}
ul.files .meta .down{color:var(--blue);font-weight:700}
ul.files .meta.bad{color:var(--red);white-space:normal}
.opts{display:flex;flex-wrap:wrap;gap:12px 16px;align-items:flex-end;margin-top:20px}
.opt{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600;color:var(--sub);min-width:150px;flex:1}
.opt b{color:var(--blue)}
.opt select,.opt input[type=number]{font:inherit;font-size:15px;font-weight:500;color:var(--text);border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:#fff;min-height:44px}
.opt input[type=range]{accent-color:var(--blue);height:44px;margin:0}
.btn.sm{padding:10px 16px;font-size:15px;border-radius:12px;min-height:44px}
.tabs{display:flex;gap:4px;background:var(--bg);border-radius:14px;padding:4px;margin-bottom:20px}
.tabs button{flex:1;border:0;background:none;font:inherit;font-size:15px;font-weight:700;color:var(--muted);padding:10px;border-radius:10px;cursor:pointer;min-height:44px}
.tabs button[aria-selected=true]{background:#fff;color:var(--text);box-shadow:0 1px 3px rgba(17,24,39,.08)}
video{display:block;width:100%;max-height:360px;border-radius:14px;background:#000}
.vrow{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;flex-wrap:wrap}
progress{flex:1;height:8px;accent-color:var(--blue);min-width:120px}
.result{margin-top:16px;padding:16px;border-radius:18px;background:var(--bg);text-align:center}
.result img{max-width:100%;max-height:420px;border-radius:12px;background:#fff}
.result .vrow{text-align:left}

/* v4 */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.textin{display:block;width:100%;font:inherit;font-size:16px;line-height:1.7;color:var(--text);border:1px solid var(--line);border-radius:16px;padding:16px 18px;resize:vertical;min-height:240px;background:#fbfcfd}
.textin.sm{min-height:110px}
.textin:focus,.opt input:focus,.opt select:focus{outline:2px solid var(--blue);outline-offset:-1px;background:#fff}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
.stat{background:var(--bg);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column}
.stat span{font-size:13px;color:var(--muted);font-weight:600}
.stat b{font-size:20px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat.main{background:var(--blue-weak)}.stat.main b{color:var(--blue);font-size:28px}
.stat.main{grid-column:span 2}
.goal{margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}
.track{height:10px;border-radius:99px;background:var(--bg);overflow:hidden;margin-top:14px}
.track div{height:100%;width:0;background:var(--blue);border-radius:99px;transition:width .2s}
.track div.over{background:var(--red)}
.gtxt{margin-top:8px;font-size:14px;color:var(--sub);font-weight:600}.gtxt.over{color:var(--red)}
.opt input[type=text],.opt input[type=tel]{font:inherit;font-size:15px;color:var(--text);border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:#fff;min-height:44px;width:100%}
.opt input[type=color]{width:100%;height:44px;border:1px solid var(--line);border-radius:12px;padding:4px;background:#fff;cursor:pointer}
.qr-grid{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:start}
.qr-box{background:var(--bg);border-radius:18px;padding:20px;display:flex;flex-direction:column;align-items:center}
.qr-box canvas{width:240px;height:auto;image-rendering:pixelated;border-radius:8px;background:#fff}
.ph{width:240px;height:240px;border:2px dashed var(--line);border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;font-size:14px;color:var(--muted);background:#fff}
.spell{margin-top:16px;border:1px solid var(--line);border-radius:18px;padding:18px}
.spell-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.spell-head b{font-size:17px}
#spell-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}
#spell-list li{display:grid;grid-template-columns:1fr auto;gap:4px 12px;align-items:center;background:var(--bg);border-radius:14px;padding:12px 14px}
#spell-list li.done{opacity:.55}
#spell-list .fix{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:16px}
#spell-list del{color:var(--red);text-decoration:line-through}
#spell-list ins{color:var(--blue);text-decoration:none;font-weight:700}
#spell-list .arr{color:var(--muted)}
#spell-list .cat{font-size:12px;font-weight:700;color:var(--sub);background:#fff;border:1px solid var(--line);border-radius:99px;padding:2px 8px}
#spell-list .help{grid-column:1;margin:0;font-size:14px;color:var(--sub);white-space:pre-line}
#spell-list button{grid-row:1/span 2;grid-column:2}
.cnt-row{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:14px}
.cnt-row a{color:var(--muted);text-decoration:none}
.cnt{color:var(--muted);font-variant-numeric:tabular-nums}.cnt.over{color:var(--red);font-weight:700}
.view{margin-top:12px;padding:14px 16px;border-radius:14px;background:#fff;border:1px solid var(--line);white-space:pre-wrap;line-height:1.8;max-height:260px;overflow:auto}
.view mark.wrong{background:none;color:var(--red);text-decoration:underline wavy var(--red);text-underline-offset:4px}
.view mark.fixed{background:var(--blue-weak);color:var(--blue);border-radius:4px}
.hint{font-size:12px;color:var(--muted);font-weight:500}
.opt select:disabled{background:var(--bg);color:var(--muted)}
.about-art{margin:32px 0 8px}.about-art svg{display:block;width:100%;height:auto}.about-art figcaption{margin-top:10px;font-size:14px;color:var(--muted);text-align:center}
.spell-note{margin:12px 0 0;font-size:13px;color:var(--muted)}
@media (max-width:720px){.qr-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}}

.savenote{margin:10px 0 0;font-size:13px;color:var(--muted);line-height:1.6}
.savenote b{color:var(--text,#191f28);font-weight:600}