:root{
  --brand:#0d9488;--brand-d:#0f766e;--tint:#e8faf6;--ink:#14201e;--mut:#5c6b68;
  --line:#e4ebe9;--surface:#fff;--bg:#f6faf9;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.6;
  font-family:"Pretendard","Noto Sans KR",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand-d);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}

/* header */
header.site{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;font-weight:800;font-size:20px;color:var(--ink);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo .mk{width:28px;height:28px;flex:none;margin-right:8px}
.logo b{color:var(--brand)}
nav.top{display:flex;gap:3px;flex-wrap:wrap}
nav.top a{color:var(--mut);font-size:14.5px;font-weight:600;padding:7px 10px;border-radius:8px}
nav.top a:hover{background:var(--tint);color:var(--brand-d);text-decoration:none}
nav.top a.on{color:var(--brand-d);background:var(--tint)}
nav.top a.langsw{color:var(--brand-d);background:var(--tint);font-weight:700;border-radius:999px;padding:7px 13px;margin-right:4px}
nav.top a.langsw:hover{background:#d5f3ee;text-decoration:none}
.navtoggle{display:none;background:none;border:0;margin:0;padding:8px;cursor:pointer;color:var(--ink);line-height:0}
.navtoggle svg{width:26px;height:26px;display:block}

/* hero + home */
.hero{text-align:center;padding:48px 0 30px}
.hero h1{font-size:34px;font-weight:800;letter-spacing:-.03em;margin:0 0 12px}
.hero h1 .br{color:var(--brand)}
.hero p{color:var(--mut);font-size:17px;max-width:600px;margin:0 auto 18px}
.badge-priv{display:inline-block;background:var(--tint);color:var(--brand-d);font-weight:700;
  font-size:14px;padding:9px 16px;border-radius:999px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0 40px}
.tool-card{display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:20px;transition:border-color .15s,transform .1s}
.tool-card:hover{border-color:var(--brand);text-decoration:none;transform:translateY(-2px)}
.tool-card .ic{width:40px;height:40px;border-radius:10px;background:var(--tint);display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.tool-card .ic svg{width:21px;height:21px;stroke:var(--brand);fill:none;stroke-width:1.7}
.tool-card .nm{font-weight:800;font-size:16.5px;color:var(--ink)}
.tool-card .ds{color:var(--mut);font-size:14px}

/* tool page */
.crumb{font-size:13.5px;color:var(--mut);padding:16px 0 4px}
.crumb a{color:var(--mut)}
.ptitle{font-size:26px;font-weight:800;letter-spacing:-.02em;margin:6px 0 6px}
.lede{color:var(--mut);font-size:16px;margin:0 0 20px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;margin-bottom:26px}
textarea.ta{width:100%;min-height:200px;resize:vertical;border:1px solid var(--line);border-radius:12px;
  padding:14px 15px;font-size:15.5px;font-family:inherit;line-height:1.7;color:var(--ink);background:#fcfefe}
textarea.ta:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:14px 0}
.field{display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--mut);font-weight:600}
.field select,.field input[type=text],.field input[type=number]{border:1px solid var(--line);border-radius:9px;padding:9px 11px;font-family:inherit;font-size:14.5px;color:var(--ink);background:#fff}
.field label{display:flex;align-items:center;gap:6px;cursor:pointer}
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:700;border:1px solid var(--line);
  background:#fff;color:var(--ink);border-radius:10px;padding:11px 16px;cursor:pointer;font-family:inherit;font-size:14.5px}
.btn:hover{border-color:var(--brand);color:var(--brand-d)}
.btn.ok{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.ok:hover{background:var(--brand-d);color:#fff}
.btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2}

/* stats (count tool) */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:4px}
.stat{background:var(--tint);border-radius:12px;padding:16px 14px;text-align:center}
.stat .v{font-size:28px;font-weight:800;color:var(--brand-d);letter-spacing:-.02em;line-height:1.1}
.stat .k{font-size:13px;color:var(--mut);font-weight:600;margin-top:4px}
.substats{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px;color:var(--mut);font-size:14px}
.substats b{color:var(--ink)}
.snslimits{display:flex;flex-wrap:wrap;gap:8px}
.snschip{font-size:13px;font-weight:600;padding:7px 11px;border-radius:999px;background:var(--tint);color:var(--brand-d);border:1px solid #cdeee8}
.snschip.over{background:#fde8e8;color:#c0392b;border-color:#f3c9c9}
.snschip b{font-weight:800}

/* output box */
.outbox{position:relative;margin-top:14px}
.outbox textarea{background:#f4f8f7}

/* doc / faq */
.doc{margin:10px 0 50px}
.doc h2{font-size:21px;font-weight:800;margin:28px 0 8px}
.doc h3{font-size:17px;font-weight:700;margin:20px 0 6px}
.doc p,.doc li{color:#394744;font-size:15.5px}
.doc ul{padding-left:20px}
.faq{margin-top:18px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:2px 16px;margin-bottom:10px;background:var(--surface)}
.faq summary{cursor:pointer;font-weight:700;padding:13px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 14px;color:var(--mut);font-size:15px}

/* related tools */
.related{margin:30px 0 8px}
.related h2{font-size:19px;font-weight:800;margin:0 0 12px;color:var(--ink)}
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.rel-card{display:block;padding:14px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-weight:700;font-size:14.5px;color:var(--ink);text-align:center}
.rel-card:hover{border-color:var(--brand);background:var(--tint);color:var(--brand-d);text-decoration:none}
@media(max-width:720px){.rel-grid{grid-template-columns:1fr 1fr}}

/* footer */
footer.site{background:#0f1c1a;color:#9fb3af;padding:30px 0;margin-top:20px;font-size:13.5px}
footer.site .flinks{display:flex;flex-wrap:wrap;gap:8px 16px;margin-bottom:12px}
footer.site .flinks a{color:#cfe0dc;font-weight:600}
footer.site .biz{line-height:1.8}

/* toast */
.tk-toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,16px);background:#14201e;color:#fff;
  font-size:14.5px;font-weight:600;padding:11px 20px;border-radius:999px;opacity:0;transition:.3s;z-index:200;pointer-events:none}
.tk-toast.show{opacity:1;transform:translate(-50%,0)}

.hide{display:none}
.err{color:#dc2626;font-size:14px;margin-top:10px}

@media(max-width:720px){
  .grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .hero h1{font-size:27px}
  .ptitle{font-size:22px}
  .navtoggle{display:block}
  header.site .wrap{position:relative}
  nav.top{position:absolute;top:60px;left:0;right:0;display:none;flex-direction:column;flex-wrap:nowrap;gap:2px;
    background:var(--surface);border-bottom:1px solid var(--line);padding:6px 18px 12px;box-shadow:0 10px 22px rgba(15,23,42,.10)}
  nav.top.open{display:flex}
  nav.top a{padding:12px 10px;font-size:16px;border-radius:8px}
}
@media(max-width:430px){ .grid{grid-template-columns:1fr} }