:root{
  --bg:#f7f8fb;
  --card:#ffffff;
  --text:#171a20;
  --muted:#5f6673;
  --line:#dfe4ec;
  --brand:#111827;
  --brand2:#334155;
  --accent:#0f172a;
  --shadow:0 12px 28px rgba(15,23,42,.08);
  --safe-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans KR","Noto Sans CJK KR","Noto Sans SC","Noto Sans JP",Arial,sans-serif;
  line-height:1.65;
  letter-spacing:-.01em;
  word-break:keep-all;
  overflow-wrap:break-word;
  min-height:100vh;
}
a{color:inherit}
.ai-wrap{width:min(1120px,calc(100% - 32px));margin:0 auto}
.ai-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.ai-header-inner{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:8px 0}
.brand{font-weight:900;text-decoration:none;color:var(--text);letter-spacing:-.03em;white-space:nowrap}
.site-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.site-nav a,.lang-pill,.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  color:var(--text);
  text-decoration:none;
  font-weight:800;
  white-space:normal;
  text-align:center;
  line-height:1.25;
}
.site-nav a{min-height:36px;padding:7px 12px;font-size:.92rem}
.lang-pill.active,.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.ai-main{padding:34px 0 76px;margin:0 auto}
.ai-lang{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 26px}
.eyebrow{font-weight:900;letter-spacing:.06em;color:var(--brand2);font-size:.9rem;text-transform:uppercase;margin:0 0 16px;word-break:break-word}
h1{font-size:clamp(2rem,5vw,3.35rem);line-height:1.12;margin:0 0 18px;letter-spacing:-.04em;word-break:keep-all;overflow-wrap:anywhere}
h2{font-size:clamp(1.35rem,3vw,2rem);line-height:1.25;margin:0 0 12px;letter-spacing:-.03em;word-break:keep-all;overflow-wrap:anywhere}
h3{margin:0 0 10px;line-height:1.35;word-break:keep-all;overflow-wrap:anywhere}
p{margin-top:0}
.lead{font-size:clamp(1.05rem,2.2vw,1.25rem);max-width:980px;color:var(--brand2);margin:0 0 26px}
.hero-actions,.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
.ai-section{margin:44px 0}
.section-head{margin-bottom:18px}.section-head p{margin:0;color:var(--muted)}
.tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.tool-card,.mini-card,.note-box,.faq-box,.tool-form-section,.result-panel{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.tool-card,.mini-card{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:var(--text);padding:20px;min-height:166px;overflow:hidden}
.tool-card strong,.mini-card strong{font-size:1.02rem;line-height:1.35;word-break:keep-all;overflow-wrap:anywhere}
.tool-card span,.mini-card span{color:var(--muted);font-size:.95rem;line-height:1.55}
.tool-card em{margin-top:auto;font-style:normal;font-weight:900;color:var(--accent)}
.tool-card:hover,.mini-card:hover{transform:translateY(-2px);transition:.18s ease;border-color:#b9c2cf}
.note-box,.faq-box,.tool-form-section{padding:28px;margin:34px 0}.note-box p,.faq-box p{color:var(--muted);margin:.5rem 0 0}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:18px}
label{display:flex;flex-direction:column;gap:8px;font-weight:900;min-width:0}
input,textarea,select{width:100%;border:1px solid var(--line);border-radius:16px;padding:14px 15px;font:inherit;background:#fff;color:var(--text);min-width:0;line-height:1.5}
textarea{resize:vertical}.result-panel{margin-top:22px;padding:22px;background:#fbfcff}.result-content{white-space:pre-wrap;color:var(--brand2);min-height:90px;word-break:keep-all;overflow-wrap:anywhere}.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.mini-card{min-height:120px}.faq-box details{border-top:1px solid var(--line);padding:14px 0}.faq-box details:first-of-type{border-top:0}.faq-box summary{font-weight:900;cursor:pointer}.ai-footer{border-top:1px solid var(--line);background:#fff;padding:28px 0;color:var(--muted)}.muted{color:var(--muted);font-size:.92rem}.subtle{background:#f8fafc}.ai-lang-en .tool-card strong,.ai-lang-en .mini-card strong,.ai-lang-en h1,.ai-lang-en h2{overflow-wrap:anywhere}.ai-lang-zh,.ai-lang-ja{line-break:strict}body.ai-busy{cursor:progress}
.ai-top-button{
  position:fixed;
  right:18px;
  bottom:calc(18px + var(--safe-bottom));
  z-index:70;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:54px;
  height:54px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,.14);
  background:rgba(15,23,42,.94);
  color:#fff;
  text-decoration:none;
  font-weight:900;
  font-size:.82rem;
  letter-spacing:.02em;
  box-shadow:0 12px 26px rgba(15,23,42,.22);
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .18s ease,transform .18s ease,background .18s ease;
}
.ai-top-button.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.ai-top-button:hover{background:#000}
.ai-top-anchor{position:absolute;top:0;left:0;width:1px;height:1px;overflow:hidden}
@media (max-width:1000px){.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:900px){.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mini-grid,.form-grid{grid-template-columns:1fr}.ai-header-inner{align-items:flex-start;flex-direction:column;padding:12px 0}.site-nav{justify-content:flex-start}.ai-main{padding-top:28px}.brand{white-space:normal}.site-nav a{font-size:.9rem}}
@media (max-width:520px){.ai-wrap{width:min(100% - 22px,1120px)}.ai-header-inner{min-height:auto}.site-nav{gap:7px}.site-nav a{padding:7px 10px}.tool-grid{grid-template-columns:1fr}.tool-card{min-height:auto}.site-nav a,.lang-pill,.btn{width:auto;min-width:0;padding-left:13px;padding-right:13px}.hero-actions .btn,.form-actions .btn{flex:1 1 150px}.note-box,.faq-box,.tool-form-section{padding:20px;border-radius:18px}h1{font-size:2rem}.lead{font-size:1rem}.ai-top-button{right:12px;bottom:calc(14px + var(--safe-bottom));width:50px;height:50px;font-size:.78rem}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool-card:hover,.mini-card:hover{transform:none}.ai-top-button{transition:none}}

/* 20260622 AI page header/category hardening: keep AI pages independent from /style.css and localmenuon.css */
.ai-header .nav-menu{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.ai-header .nav-menu a{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);text-decoration:none;font-weight:800;white-space:normal;text-align:center;line-height:1.25;font-size:.92rem}
.ai-header .nav-menu a:hover,.ai-header .site-nav a:hover{border-color:#b9c2cf;background:#f8fafc}
@media (max-width:900px){.ai-header .nav-menu{justify-content:flex-start}.ai-header .nav-menu a{font-size:.9rem}}
@media (max-width:520px){.ai-header .nav-menu{gap:7px}.ai-header .nav-menu a{padding:7px 10px}}