/* かんたん表メーカー — shared styles (BY LOM) */
:root{
  --bg:#fafafa;
  --surface:#ffffff;
  --ink:#12141a;
  --ink-soft:#5b6172;
  --ink-faint:#9aa0b0;
  --line:#e6e8ec;
  --line-strong:#d3d7de;
  --accent:#3553f0;
  --accent-soft:#eef1ff;
  --accent-line:#c3cdff;
  --radius:12px;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --sans:'Inter','Noto Sans JP',-apple-system,BlinkMacSystemFont,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:15px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 22px}
a{color:var(--accent)}

/* ---------- nav ---------- */
nav{
  border-bottom:1px solid var(--line);background:rgba(250,250,250,.85);
  backdrop-filter:blur(10px);position:sticky;top:0;z-index:20;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15.5px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand-mark{
  width:26px;height:26px;border-radius:7px;background:var(--accent);flex:none;
  display:grid;place-items:center;color:#fff;font-family:var(--mono);font-size:13px;
}
.nav-links{display:flex;gap:20px;font-size:13px}
.nav-links a{text-decoration:none;color:var(--ink-soft);transition:color .15s}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--accent)}
@media(max-width:820px){.nav-links{display:none}}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(10px);animation:rise .7s cubic-bezier(.2,.7,.3,1) forwards}
.rv:nth-child(1){animation-delay:.05s}.rv:nth-child(2){animation-delay:.13s}
.rv:nth-child(3){animation-delay:.21s}.rv:nth-child(4){animation-delay:.29s}
@keyframes rise{to{opacity:1;transform:none}}

/* ---------- hero (tool page) ---------- */
.hero{position:relative;padding:58px 0 42px;overflow:hidden}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:radial-gradient(ellipse 65% 75% at 50% 30%,#000,transparent);
  mask-image:radial-gradient(ellipse 65% 75% at 50% 30%,#000,transparent);
  opacity:.7;
}
.hero-inner{position:relative}
.index-line{
  display:flex;align-items:center;gap:14px;font-family:var(--mono);
  font-size:10.5px;letter-spacing:.14em;color:var(--ink-faint);
  text-transform:uppercase;margin-bottom:22px;
}
.index-line .rule{flex:1;height:1px;background:var(--line-strong)}
.index-line b{color:var(--accent);font-weight:500}
h1{font-size:clamp(27px,4.2vw,40px);font-weight:700;letter-spacing:-.02em;line-height:1.4;margin-bottom:16px;max-width:20em}
h1 .mark{background:linear-gradient(transparent 62%,var(--accent-line) 62%);padding:0 2px}
.lede{color:var(--ink-soft);max-width:38em;font-size:15.5px}
.badges{display:flex;gap:8px;margin-top:22px;flex-wrap:wrap}
.badge{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--line-strong);border-radius:999px;padding:5px 12px;
  color:var(--ink-soft);background:var(--surface);
}
.badge.live{border-color:var(--accent-line);color:var(--accent);background:var(--accent-soft);display:inline-flex;align-items:center;gap:7px}
.badge.live::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--accent);animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

/* ---------- document pages ---------- */
.doc-head{position:relative;padding:46px 0 32px;border-bottom:1px solid var(--line);overflow:hidden}
.doc-head .hero-grid{opacity:.55}
.doc-head-inner{position:relative}
.doc-head h1{font-size:clamp(24px,3.6vw,33px);margin-bottom:12px}
.doc-head p{color:var(--ink-soft);max-width:40em}
.doc{padding:40px 0 60px}
.doc h2{
  font-size:19px;font-weight:700;letter-spacing:-.01em;margin:44px 0 14px;
  padding-top:22px;border-top:1px solid var(--line);
}
.doc h2:first-of-type{margin-top:0;border-top:none;padding-top:0}
.doc h3{font-size:16px;font-weight:700;margin:28px 0 8px}
.doc p{margin-bottom:14px;color:#2c303b}
.doc ul,.doc ol{margin:0 0 16px 20px;color:#2c303b}
.doc li{margin-bottom:6px}
.doc strong{font-weight:700}
.doc .updated{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--ink-faint);text-transform:uppercase;margin-bottom:26px}

.callout{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:0 10px 10px 0;padding:14px 16px;margin:0 0 20px;font-size:14px;color:var(--ink-soft);
}
.callout b{color:var(--ink)}

/* step blocks */
.stepblock{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;margin-bottom:14px;
}
.stepblock .n{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.stepblock h3{margin:0 0 6px;font-size:16px}
.stepblock p:last-child{margin-bottom:0}

/* faq */
.faq-item{border-bottom:1px solid var(--line);padding:4px 0}
.faq-item summary{
  cursor:pointer;list-style:none;padding:16px 34px 16px 0;position:relative;
  font-weight:600;font-size:15.5px;transition:color .15s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-item summary::after{
  content:'+';position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:18px;color:var(--ink-faint);transition:transform .25s,color .15s;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--accent)}
.faq-item .a{padding:0 0 18px;color:var(--ink-soft);font-size:14.5px;animation:fade .3s ease}
.faq-item .a p{margin-bottom:10px;color:var(--ink-soft)}
.faq-item .a p:last-child{margin-bottom:0}
@keyframes fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

code{font-family:var(--mono);font-size:.9em;background:#f2f3f6;border:1px solid var(--line);border-radius:5px;padding:1px 5px}
kbd{font-family:var(--mono);font-size:11px;background:#f4f5f7;border:1px solid var(--line-strong);border-bottom-width:2px;border-radius:5px;padding:1px 5px}

.cta-back{
  display:inline-flex;align-items:center;gap:8px;margin-top:34px;
  background:var(--accent);color:#fff;text-decoration:none;font-weight:600;font-size:14px;
  border-radius:9px;padding:11px 20px;transition:.18s;
}
.cta-back:hover{background:#2740d8;transform:translateY(-1px)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:30px 0 44px;background:var(--surface)}
.foot-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:flex-start}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;font-size:13px}
.foot-links a{text-decoration:none;color:var(--ink-soft)}
.foot-links a:hover{color:var(--accent)}
.foot-note{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--ink-faint);text-transform:uppercase;max-width:34em;line-height:1.7}

@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}