/* 株式会社情報システム室 共通スタイル（Q&A型） */
:root{--bg:#0e1116;--panel:#161b22;--ink:#e8edf2;--sub:#9aa7b4;--line:#2a333f;--teal:#3ee0c0;--paper:#f6f8fa;--text:#17202a;--muted:#4a5866;--rule:#e3e8ee;--link:#0b7d68}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:"IBM Plex Sans JP",sans-serif;line-height:1.85;font-size:16px}
.mono{font-family:"IBM Plex Mono",monospace}
a{color:var(--link)}
img{max-width:100%}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;background:#fff;padding:6px 10px;z-index:99}

/* header */
.top{background:var(--bg);color:var(--ink)}
.hd{display:flex;justify-content:space-between;align-items:center;height:64px;gap:16px}
.logo{color:var(--ink);text-decoration:none;font-weight:700;white-space:nowrap}
.logo i{font-style:normal;color:var(--teal)}
.gnav ul{display:flex;gap:20px;list-style:none;margin:0;padding:0;font-size:13.5px}
.gnav a{color:var(--sub);text-decoration:none}
.gnav a:hover,.gnav a[aria-current]{color:var(--teal)}
.hd-cta{background:var(--teal);color:#062b25;text-decoration:none;font-weight:700;font-size:13px;padding:7px 14px;border-radius:6px;white-space:nowrap}
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:4px 12px;font-size:13px}
.mnav summary::-webkit-details-marker{display:none}
.mnav ul{position:absolute;right:0;top:40px;background:var(--panel);border:1px solid var(--line);border-radius:10px;list-style:none;margin:0;padding:8px;min-width:200px;z-index:10}
.mnav a{display:block;color:var(--ink);text-decoration:none;padding:8px 12px;border-radius:6px}
.mnav a:hover{background:#222b36}
@media(max-width:860px){.gnav,.hd-cta{display:none}.mnav{display:block}}

/* hero (top page) */
.hero{padding-top:56px;padding-bottom:72px}
.prompt{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 20px;display:flex;gap:12px;align-items:center;max-width:720px}
.prompt .mono{color:var(--teal);font-size:13px}
.caret{display:inline-block;width:8px;height:18px;background:var(--teal);vertical-align:middle;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
@media (prefers-reduced-motion:reduce){.caret{animation:none}}
.reply{margin-top:22px;max-width:840px}
.reply h1{font-size:clamp(26px,4vw,40px);line-height:1.45;margin:0 0 16px}
.reply h1 em{font-style:normal;color:var(--teal)}
.reply p{color:var(--sub);margin:0}
.cta{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--teal);color:#062b25;text-decoration:none;font-weight:700;padding:12px 22px;border-radius:8px}
.btn.o{background:transparent;color:var(--ink);border:1px solid var(--line)}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:44px}
.facts>div{background:var(--panel);padding:14px 18px}
.facts .k{font-size:11px;color:var(--sub)}
.facts .v{font-weight:700}
@media(max-width:760px){.facts{grid-template-columns:1fr 1fr}}

/* page head (lower pages) */
.ph{padding-top:40px;padding-bottom:48px}
.ph .en{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--teal);letter-spacing:.12em}
.ph h1{margin:6px 0 10px;font-size:clamp(24px,3.6vw,34px);line-height:1.45;word-break:auto-phrase;text-wrap:balance}
.ph p{color:var(--sub);margin:0;max-width:880px;word-break:auto-phrase;text-wrap:pretty}
.bc{background:#fff;border-bottom:1px solid var(--rule);font-size:13px}
.bc ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:10px 0}
.bc li+li::before{content:"/";color:#9aa7b4;margin-right:6px}
.bc a{color:var(--muted)}

/* in-page toc */
.toc{background:#fff;border-bottom:1px solid var(--rule);position:sticky;top:0;z-index:4}
.toc ol{display:flex;gap:6px;overflow-x:auto;list-style:none;margin:0;padding:12px 0;font-size:13px;white-space:nowrap}
.toc a{display:block;padding:4px 12px;border-radius:999px;background:#eef2f6;text-decoration:none;color:#334}

/* Q&A section */
.qa{padding:56px 0;border-bottom:1px solid var(--rule)}
.qa:last-of-type{border-bottom:0}
.q{display:flex;gap:14px;align-items:flex-start}
.q .mono{background:var(--bg);color:var(--teal);border-radius:6px;padding:2px 8px;font-size:13px;margin-top:6px;flex-shrink:0}
.q h2{margin:0;font-size:clamp(20px,2.8vw,26px);line-height:1.5}
.short{background:#fff;border:1px solid var(--rule);border-left:4px solid var(--teal);border-radius:8px;padding:18px 22px;margin:22px 0}
.short b{display:block;font-size:12px;color:var(--link);letter-spacing:.08em;margin-bottom:4px}
.short p{margin:0;font-size:16.5px}
.prose p{margin:0 0 1em}
.prose h3{font-size:18px;margin:28px 0 8px}
.cols{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.cols.c3{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.cols,.cols.c3{grid-template-columns:1fr}}
.box{background:#fff;border:1px solid var(--rule);border-radius:10px;padding:20px}
.box h3{margin:0 0 6px;font-size:16px}
.box p,.box li{color:var(--muted);font-size:14.5px;margin:0}
.box ul{padding-left:18px;margin:6px 0 0}
.box .lnk{margin-top:12px}
.lbl{display:inline-block;font-size:11px;font-weight:700;color:#fff;background:var(--text);border-radius:4px;padding:1px 8px;margin-bottom:6px}
.lbl.f{background:var(--link)}
.lnk{display:inline-block;margin-top:18px;margin-right:18px;font-weight:700;text-decoration:none}
.lnk::after{content:" →"}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--rule);font-size:14.5px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid #eef1f4;vertical-align:top}
tbody th{width:28%;background:#f9fbfc;font-weight:500;color:var(--muted)}
thead th{background:var(--bg);color:var(--ink);font-weight:500}
@media(max-width:640px){.kv th,.kv td{display:block;width:100%}.kv th{border-bottom:0;padding-bottom:2px}}
.scroll{overflow-x:auto}
.note{font-size:12.5px;color:var(--muted)}
.copy{font-size:12px;border:1px solid var(--rule);background:#fff;border-radius:4px;padding:1px 8px;cursor:pointer;margin-left:6px}

/* faq list */
.faq details{background:#fff;border:1px solid var(--rule);border-radius:10px;padding:14px 20px;margin-bottom:10px}
.faq summary{font-weight:700;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q.";font-family:"IBM Plex Mono",monospace;color:var(--link);margin-right:10px}
.faq details p{margin:10px 0 0;color:var(--muted)}
.faq h2{font-size:20px;margin:36px 0 14px}

/* steps */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{background:#fff;border:1px solid var(--rule);border-radius:10px;padding:16px 20px 16px 64px;position:relative}
.steps li::before{counter-increment:s;content:counter(s,decimal-leading-zero);position:absolute;left:18px;top:16px;font-family:"IBM Plex Mono",monospace;color:var(--link);font-weight:500}
.steps b{display:block}
.steps span{color:var(--muted);font-size:14.5px}

/* category grid */
.cat{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:820px){.cat{grid-template-columns:1fr}}
.cat .box h3{font-size:15px}

/* news */
.news{list-style:none;padding:0;margin:0}
.news li{display:flex;gap:14px;align-items:baseline;flex-wrap:wrap;padding:14px 0;border-bottom:1px solid var(--rule);font-size:15px}
.news .mono{color:var(--link);font-size:13px}
.news .tag{font-size:11px;border:1px solid var(--link);color:var(--link);border-radius:4px;padding:0 6px}

/* form */
form .row{margin-bottom:16px}
form label{display:block;font-weight:700;font-size:14px;margin-bottom:4px}
form .req{font-size:11px;background:#c0392b;color:#fff;border-radius:3px;padding:0 5px;margin-left:6px}
form input,form textarea,form select{width:100%;font:inherit;border:1px solid #c9d2dc;border-radius:6px;padding:10px 12px;background:#fff}
form textarea{min-height:160px}
form button{font:inherit;font-weight:700;background:var(--teal);color:#062b25;border:0;border-radius:8px;padding:12px 28px;cursor:pointer}

.updated{font-size:12px;color:var(--muted);text-align:right;margin:24px 0 0}

/* closing CTA + footer */
.end{background:var(--bg);color:var(--ink);padding:60px 0;text-align:center}
.end h2{margin:0 0 10px;font-size:clamp(22px,3vw,28px)}
.end p{color:var(--sub);margin:0 auto;max-width:680px}
.end .cta{justify-content:center}
footer{background:var(--bg);color:var(--sub);font-size:12.5px;padding:0 0 36px;border-top:1px solid var(--line)}
footer .fg{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;padding:28px 0 16px}
footer b{color:var(--ink)}
footer .fl{display:flex;flex-wrap:wrap;gap:6px 18px;max-width:520px}
footer a{color:var(--sub)}
@media(max-width:760px){br.pc{display:none}}