:root{
  --bg:#F3F5F8;
  --card:#FFFFFF;
  --ink:#18202E;
  --muted:#5F6B7E;
  --line:#E1E5EC;
  --blue:#2B59E8;
  --blue-ink:#1C3DA8;
  --tape:#FFD23F;
  --soft:#EEF2FD;
  --radius:14px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Pretendard Variable",Pretendard,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  font-size:16px;line-height:1.65;word-break:keep-all}
a{color:var(--blue-ink)}
img{max-width:100%}

/* ---------- header with ruler ---------- */
.top{background:var(--card);position:sticky;top:0;z-index:20}
.top-in{max-width:760px;margin:0 auto;padding:10px 16px 0;display:flex;align-items:center;gap:14px}
.logo{font-weight:900;font-size:19px;letter-spacing:-.04em;color:var(--ink);text-decoration:none;white-space:nowrap;display:flex;align-items:center;gap:6px}
.logo i{display:inline-block;width:14px;height:14px;background:var(--tape);border:2px solid var(--ink);border-radius:3px;transform:rotate(-8deg)}
.nav{display:flex;gap:4px;overflow-x:auto;min-width:0;scrollbar-width:none;flex:1;padding-bottom:2px}
.nav::-webkit-scrollbar{display:none}
.nav a{flex:none;font-size:14px;padding:6px 10px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:600}
.nav a:hover{background:var(--soft);color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--tape)}
.ruler{height:12px;margin-top:8px;
  background:
   repeating-linear-gradient(90deg,var(--ink) 0 1px,transparent 1px 50px) bottom/100% 11px no-repeat,
   repeating-linear-gradient(90deg,var(--ink) 0 1px,transparent 1px 10px) bottom/100% 6px no-repeat;
  border-bottom:1px solid var(--ink)}

/* ---------- layout ---------- */
main{overflow-x:hidden;max-width:760px;margin:0 auto;padding:22px 16px 40px}
.eyebrow{font-size:13px;font-weight:700;color:var(--muted);margin:0 0 4px}
h1{font-size:28px;line-height:1.25;letter-spacing:-.03em;margin:0 0 6px;font-weight:850}
.lead{color:var(--muted);margin:0 0 18px}
h2{font-size:20px;letter-spacing:-.02em;margin:34px 0 10px}
h3{font-size:17px;margin:22px 0 6px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card + .card{margin-top:14px}

/* ---------- form ---------- */
label{display:block;font-size:14px;font-weight:700;margin:0 0 6px}
.field{margin-bottom:14px}
.row{display:flex;gap:10px;flex-wrap:wrap}
.row > .field{flex:1 1 180px}
input[type=text],input[type=date],input[type=number],input[type=password],select,textarea{
  width:100%;font:inherit;font-size:16px;color:var(--ink);background:#fff;
  border:1.5px solid var(--line);border-radius:10px;padding:11px 12px;outline:none}
textarea{min-height:200px;resize:vertical;line-height:1.6}
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(43,89,232,.15)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:750;font-size:16px;
  border:0;border-radius:10px;padding:12px 18px;background:var(--blue);color:#fff;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--blue-ink)}
.btn.ghost{background:var(--soft);color:var(--blue-ink)}
.btn.ghost:hover{background:#E0E7FB}
.btn.wide{width:100%}
.btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--tape);outline-offset:2px}
.check{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:500;margin:0}
.check input{width:18px;height:18px}

.tabs{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.tabs button{font:inherit;font-size:15px;font-weight:700;padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--muted);cursor:pointer}
.tabs button[aria-selected="true"]{border-color:var(--ink);color:var(--ink);background:var(--tape)}

/* ---------- result readout (signature: tape highlight) ---------- */
.result{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line)}
.result[hidden]{display:none}
.readout{font-size:40px;font-weight:900;letter-spacing:-.03em;line-height:1.15;font-variant-numeric:tabular-nums;margin:0 0 4px}
.readout mark{background:linear-gradient(transparent 58%,var(--tape) 58%);color:inherit;padding:0 2px}
.readout small{font-size:18px;font-weight:700;color:var(--muted);margin-left:4px}
.sub{color:var(--muted);margin:0}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin-top:14px}
.stat{background:var(--bg);border-radius:10px;padding:10px 12px}
.stat b{display:block;font-size:22px;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat span{font-size:13px;color:var(--muted)}
table.list{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:15px}
table.list th,table.list td{text-align:left;padding:9px 6px;border-bottom:1px solid var(--line)}
table.list th{font-size:13px;color:var(--muted);font-weight:700}
.past{color:var(--muted)}

/* ---------- ad slot ---------- */
.ad{margin:26px 0 6px}
.ad-note{font-size:12px;color:var(--muted);margin:0 0 6px}
.ad iframe{display:block;width:100%;border:0;border-radius:10px;background:transparent}

/* ---------- article / faq ---------- */
.article p,.article li{color:#2B3445}
.article ul{padding-left:20px}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:8px}
summary{font-weight:700;cursor:pointer}
details p{margin:8px 0 0;color:#2B3445}
.note{font-size:13px;color:var(--muted)}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:var(--card);margin-top:30px}
.foot-in{max-width:760px;margin:0 auto;padding:22px 16px 34px;font-size:14px;color:var(--muted)}
.foot h4{margin:0 0 8px;font-size:14px;color:var(--ink)}
.more{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.more a{text-decoration:none;color:var(--ink);background:var(--bg);border-radius:8px;padding:6px 10px;font-size:14px}
.more a:hover{background:var(--tape)}

/* ---------- home ---------- */
.hero{padding:10px 0 6px}
.hero h1{font-size:34px}
.group{margin-top:24px}
.group h2{font-size:14px;color:var(--muted);margin:0 0 8px;font-weight:700}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.tool{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-decoration:none;color:var(--ink);transition:transform .15s,border-color .15s}
.tool:hover{border-color:var(--ink);transform:translateY(-2px)}
.tool b{display:block;font-size:17px;letter-spacing:-.02em}
.tool span{font-size:14px;color:var(--muted)}

@media (max-width:520px){
  h1{font-size:24px}.hero h1{font-size:28px}
  .readout{font-size:34px}
  .logo span{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------- v2 additions ---------- */
.nav a.nav-all{color:var(--ink);border:1.5px solid var(--line)}
.group h2 span{display:inline-block;margin-left:4px;font-size:12px;background:var(--line);color:var(--muted);border-radius:99px;padding:0 7px}
.more a.more-all{background:var(--ink);color:#fff}
.more a.more-all:hover{background:var(--blue)}
.out{background:var(--bg);border-radius:10px;padding:12px;min-height:60px;white-space:pre-wrap;word-break:break-all;font-variant-numeric:tabular-nums}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.btns .btn{padding:10px 14px;font-size:15px}
.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:6px}
.chips button{font:inherit;font-size:20px;height:46px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer}
.chips button:hover{background:var(--tape)}
.bigbox{border-radius:var(--radius);min-height:260px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:24px;font-weight:800;cursor:pointer;user-select:none;padding:20px}
.dropzone{border:2px dashed var(--line);border-radius:12px;padding:16px;text-align:center;color:var(--muted)}
.filelist{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:6px}
.filelist li{display:flex;align-items:center;gap:8px;background:var(--bg);border-radius:8px;padding:8px 10px;font-size:14px}
.filelist li span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.filelist button{font:inherit;font-size:13px;border:1px solid var(--line);background:#fff;border-radius:6px;padding:3px 8px;cursor:pointer}
.diff-add{background:#DDF4E4}.diff-del{background:#FBE1DE;text-decoration:line-through}
canvas.work{max-width:100%;height:auto;border:1px solid var(--line);border-radius:10px;background:var(--bg);touch-action:none;display:block;margin:0 auto}
.swatch{height:120px;border-radius:12px;border:1px solid var(--line)}