/* ============================================================
   合同会社むすび
   軸: 定款2 インターネットを利用した各種情報提供サービス
   構成: hero=全画面写真・見出しは中央 / 図版=写真2枚を細い隙間で並べる /
        事業=表のように項目名と説明を対で並べる / 進め方=巨大な番号 / 対応範囲あり
   動き: 登場=左右に割れた画が合わさる／左から拭う ・ スクロール=速度差の視差
        ・ ホバー=文字が入れ替わる（ボタン）
   文章: 社名の比喩に寄せない。体言止めを使わない。（design-brief.md）
   ============================================================ */
:root{
  --paper:#f5f1e8;
  --paper-2:#ece6d8;
  --ink:#22303f;
  --ink-2:#495768;
  --ink-3:#7c8794;
  --ai:#2c4767;
  --ai-deep:#1b3050;
  --shu:#b8462a;
  --hair:rgba(34,48,63,.15);
  --wrap:1120px;
  --pad:clamp(1.3rem,4.5vw,4rem);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"Noto Sans JP",system-ui,-apple-system,Meiryo,sans-serif;background:var(--paper);color:var(--ink);
  line-height:2.05;font-size:15.5px;letter-spacing:.035em;overflow-x:hidden;-webkit-font-smoothing:antialiased;
  line-break:strict;word-break:auto-phrase}
p,li,dd,td,.a,.sub,.lead{text-wrap:pretty}
h1,h2,h3,h4{text-wrap:balance;line-break:strict;word-break:auto-phrase}
.nb{white-space:nowrap}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--shu);color:#fff}
.mincho{font-family:"Shippori Mincho B1","Hiragino Mincho ProN",serif;font-weight:600}
.lat{font-family:"Zen Kaku Gothic New",sans-serif;letter-spacing:.32em;text-transform:uppercase;font-size:.63rem;color:var(--shu);font-weight:500}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--shu);z-index:90;transition:width .1s linear}

/* header：中央に社名、両脇にメニュー */
.site-header{position:fixed;inset:0 0 auto 0;z-index:80;display:flex;align-items:center;justify-content:space-between;
  padding:20px var(--pad);transition:background .4s,padding .4s;color:#fff}
.site-header.solid{background:rgba(245,241,232,.94);backdrop-filter:blur(9px);border-bottom:1px solid var(--hair);color:var(--ink);padding-top:13px;padding-bottom:13px}
.brand{display:flex;align-items:center;gap:11px}
.brand .mono{width:34px;height:34px;border:1px solid currentColor;border-radius:50%;display:grid;place-items:center;font-family:"Shippori Mincho B1",serif;font-size:.92rem;flex:none}
.brand .bt b{display:block;font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:.95rem;letter-spacing:.12em}
.brand .bt span{font-size:.55rem;letter-spacing:.3em;opacity:.7}
.nav{display:flex;align-items:center;gap:22px}
.nav a{font-size:.79rem;letter-spacing:.09em}
.site-header.solid .nav a:not(.nav-cta):hover,.site-header.solid .nav a[aria-current=page]:not(.nav-cta){color:var(--shu)}
.site-header:not(.solid) .nav a:not(.nav-cta):hover,.site-header:not(.solid) .nav a[aria-current=page]:not(.nav-cta){color:#f0c8b8}
.nav .nav-cta{border:1px solid currentColor;border-radius:999px;padding:7px 17px;font-size:.73rem}
.site-header.solid .nav .nav-cta:hover{background:var(--ink);color:var(--paper)}
.nav-toggle{display:none}

/* hero：全画面写真・見出しは中央。写真は左右から合わさって現れる */
.hero{position:relative;min-height:100svh;display:grid;place-items:center;text-align:center;overflow:hidden;background:var(--ai-deep)}
.hero-halves{position:absolute;inset:0;display:flex}
.hero-halves span{flex:1;overflow:hidden;position:relative}
.hero-halves span::before{content:"";position:absolute;inset:0;width:200%;background-image:url("img/hero.jpg");background-size:cover;background-position:center;filter:saturate(.85) brightness(.72);transition:transform 1.5s cubic-bezier(.16,1,.3,1)}
.hero-halves span:first-child::before{left:0;background-position:center center;transform:translateX(-100%)}
.hero-halves span:last-child::before{left:auto;right:0;background-position:center center;transform:translateX(100%)}
.hero.lit .hero-halves span::before{transform:none}
.hero-veil{position:absolute;inset:0;background:radial-gradient(110% 80% at 50% 45%,rgba(27,48,80,.15),rgba(27,48,80,.72))}
.hero-inner{position:relative;z-index:3;padding:0 var(--pad);max-width:920px;color:#fff}
.hero .lat{display:block;margin-bottom:1.5rem;color:#e8b7a5;opacity:0;transition:opacity .9s .5s}
.hero.lit .lat{opacity:1}
.hero h1{font-family:"Shippori Mincho B1",serif;font-weight:700;font-size:clamp(2rem,5.4vw,4rem);line-height:1.6;letter-spacing:.1em;
  clip-path:inset(0 100% 0 0);transition:clip-path 1.3s cubic-bezier(.2,.7,.2,1) .55s}
.hero.lit h1{clip-path:inset(0)}
.hero .sub{margin:2rem auto 0;max-width:34rem;color:rgba(255,255,255,.88);font-size:.96rem;opacity:0;transition:opacity 1s .95s}
.hero.lit .sub{opacity:1}
.hero-actions{margin-top:2.4rem;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;opacity:0;transition:opacity 1s 1.15s}
.hero.lit .hero-actions{opacity:1}
.hero-scroll{position:absolute;left:50%;bottom:2.4rem;transform:translateX(-50%);z-index:3;color:rgba(255,255,255,.7);font-size:.6rem;letter-spacing:.3em;text-transform:uppercase}
.hero-scroll::after{content:"";display:block;width:1px;height:32px;background:rgba(255,255,255,.5);margin:8px auto 0}

/* ボタン：押すと文字が上へ抜けて、同じ文字が下から入れ替わる */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;overflow:hidden;
  font-size:.82rem;letter-spacing:.1em;padding:13px 28px;border:1px solid currentColor;border-radius:999px;height:3.1em}
.btn .t{display:block;transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.btn .t2{position:absolute;left:0;right:0;transform:translateY(120%)}
.btn:hover .t1{transform:translateY(-120%)}
.btn:hover .t2{transform:translateY(0)}
.btn .ar{display:none}
.btn-fill{background:var(--shu);color:#fff;border-color:var(--shu)}
.btn-fill:hover{background:#9d3a22;border-color:#9d3a22}
.btn-line{color:#fff}
.btn-line:hover{background:rgba(255,255,255,.12)}
.btn-ink{color:var(--ink)}
.btn-ink:hover{background:var(--ink);color:var(--paper)}

/* section */
.section{padding:clamp(5rem,12vw,9.5rem) 0;position:relative}
.section.paper-2{background:var(--paper-2)}
.section.ai{background:var(--ai);color:#f2ede2}
.section.ai .lat{color:#e8b7a5}
.sec-head{margin-bottom:clamp(2.4rem,5.5vw,4rem);max-width:44rem}
.sec-head .lat{display:block;margin-bottom:.9rem}
.sec-head h2{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:clamp(1.5rem,3.6vw,2.4rem);line-height:1.6;letter-spacing:.07em}
.sec-head p{margin-top:1rem;color:var(--ink-2)}
.section.ai .sec-head p{color:rgba(242,237,226,.82)}

/* 事業：表のように、項目名と説明を対にして並べる */
.deflist{border-top:1px solid var(--hair)}
.section.ai .deflist{border-color:rgba(242,237,226,.22)}
.deflist .row{display:grid;grid-template-columns:15rem 1fr;gap:clamp(1rem,3.5vw,3rem);padding:clamp(1.7rem,3.5vw,2.5rem) 0;border-bottom:1px solid var(--hair)}
.section.ai .deflist .row{border-color:rgba(242,237,226,.22)}
.deflist .row.lead{background:linear-gradient(90deg,rgba(184,70,42,.07),transparent 55%)}
.deflist .k{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:1.02rem;letter-spacing:.05em}
.deflist .k .n{display:block;font-family:"Zen Kaku Gothic New",sans-serif;font-size:.6rem;letter-spacing:.2em;color:var(--shu);margin-bottom:.5rem}
.deflist .row.lead .k .n::after{content:"　いちばん多い仕事"}
.deflist .v{color:var(--ink-2);font-size:.93rem}
.deflist .v p+p{margin-top:.8rem}
.note-line{margin-top:2rem;font-size:.8rem;color:var(--ink-3);max-width:44rem}

/* 何をする会社か：写真2枚を細い隙間で並べる */
.duo{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.8rem,5vw,4rem);align-items:center}
.duo .pair{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.duo .pair img{width:100%;aspect-ratio:3/4;object-fit:cover;filter:saturate(.88);clip-path:inset(0 0 100% 0);transition:clip-path 1.15s cubic-bezier(.2,.7,.2,1)}
.duo .pair img:nth-child(2){transition-delay:.14s}
.reveal.on .duo .pair img,.duo.reveal.on .pair img{clip-path:inset(0)}
.duo .big{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:clamp(1.3rem,3vw,2rem);line-height:1.95;letter-spacing:.07em;margin-bottom:1.4rem}
.duo p{color:var(--ink-2);margin-top:.9rem}

/* 進め方：巨大な番号の脇に短い説明 */
.bignum{display:grid;gap:0;border-top:1px solid var(--hair)}
.section.ai .bignum{border-color:rgba(242,237,226,.22)}
.bignum .s{display:grid;grid-template-columns:7rem 1fr;gap:clamp(1rem,3vw,2.4rem);align-items:center;padding:1.6rem 0;border-bottom:1px solid var(--hair)}
.section.ai .bignum .s{border-color:rgba(242,237,226,.22)}
.bignum .s .k{font-family:"Shippori Mincho B1",serif;font-size:clamp(2.2rem,5vw,3.4rem);line-height:1;color:var(--shu);opacity:.55}
.bignum .s h4{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:1.02rem;margin-bottom:.3rem;letter-spacing:.04em}
.bignum .s p{font-size:.91rem;color:var(--ink-2)}
.section.ai .bignum .s p{color:rgba(242,237,226,.8)}

/* 対応範囲 */
.scope{display:flex;flex-wrap:wrap;gap:.65rem}
.scope span{border:1px solid var(--hair);border-radius:999px;padding:8px 18px;font-size:.83rem;color:var(--ink-2);background:var(--paper)}
.section.paper-2 .scope span{background:var(--paper-2)}

/* 会社概要 */
.table-info{width:100%;border-collapse:collapse;font-size:.93rem}
.table-info th,.table-info td{border-top:1px solid var(--hair);padding:1.2rem .3rem;text-align:left;vertical-align:top}
.section.ai .table-info th,.section.ai .table-info td{border-color:rgba(242,237,226,.22)}
.table-info th{width:11rem;font-weight:600;color:var(--ink-3);font-size:.82rem;letter-spacing:.07em}
.section.ai .table-info th{color:rgba(242,237,226,.62)}
.table-info tr:last-child td,.table-info tr:last-child th{border-bottom:1px solid var(--hair)}
.section.ai .table-info tr:last-child td,.section.ai .table-info tr:last-child th{border-color:rgba(242,237,226,.22)}

/* よくある質問（この社では出さないが、下層で使えるように残す） */
.faq{max-width:46rem}
.faq details{border-bottom:1px solid var(--hair);padding:1.3rem 0}
.faq details:first-child{border-top:1px solid var(--hair)}
.faq summary{list-style:none;cursor:pointer;display:flex;gap:.9rem;font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:.98rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"問";color:var(--shu);flex:none}
.faq summary::after{content:"＋";margin-left:auto;color:var(--ink-3);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:.9rem 0 0 2rem;color:var(--ink-2);font-size:.91rem}

.cta{background:var(--ink);color:#f2ede2;text-align:center;padding:clamp(4.5rem,10vw,7.5rem) var(--pad)}
.cta .lat{color:#e8b7a5}
.cta h2{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:clamp(1.5rem,3.6vw,2.3rem);margin:1rem 0 .8rem;letter-spacing:.08em}
.cta p{color:rgba(242,237,226,.78);margin-bottom:2rem}

.page-hero{padding:clamp(8rem,15vw,11rem) var(--pad) clamp(2.6rem,6vw,4.2rem);background:var(--ai);color:#f2ede2}
.page-hero .lat{display:block;margin-bottom:.9rem;color:#e8b7a5}
.page-hero h1{font-family:"Shippori Mincho B1",serif;font-weight:700;font-size:clamp(1.7rem,4.4vw,2.8rem);letter-spacing:.1em}

.prose{max-width:44rem}
.prose h2{font-family:"Shippori Mincho B1",serif;font-weight:600;font-size:1.1rem;margin:2.6rem 0 .9rem;padding-bottom:.5rem;border-bottom:1px solid var(--hair)}
.prose h2:first-child{margin-top:0}
.prose p,.prose li{color:var(--ink-2);font-size:.93rem}
.prose ul,.prose ol{margin:.5rem 0 .5rem 1.4rem}.prose li{margin:.3rem 0}
.prose .stamp{font-size:.79rem;color:var(--ink-3);margin-top:2.2rem}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.3rem;max-width:44rem;margin-bottom:2.4rem}
.contact-grid .card{border:1px solid var(--hair);border-radius:6px;padding:1.4rem;background:var(--paper)}
.section.paper-2 .contact-grid .card{background:var(--paper-2)}
.contact-grid .card .lat{display:block;margin-bottom:.4rem}
.form{max-width:44rem;display:grid;gap:1.1rem}
.form label{font-size:.77rem;letter-spacing:.09em;display:block;margin-bottom:.35rem;color:var(--ink-3)}
.form input,.form textarea{width:100%;border:1px solid var(--hair);border-radius:4px;padding:.8rem .9rem;font:inherit;background:var(--paper)}
.form input:focus,.form textarea:focus{outline:2px solid var(--shu);border-color:var(--shu)}
.form .note{font-size:.83rem;color:var(--ink-2);background:var(--paper-2);border:1px solid var(--hair);border-radius:6px;padding:1rem}

.site-footer{background:var(--ink);color:rgba(242,237,226,.7);padding:clamp(3.5rem,8vw,5.5rem) var(--pad) 2.2rem}
.footer-top{max-width:var(--wrap);margin:0 auto;display:flex;justify-content:space-between;gap:2.6rem;flex-wrap:wrap}
.footer-brand .mono{width:38px;height:38px;border:1px solid rgba(242,237,226,.5);border-radius:50%;display:grid;place-items:center;font-family:"Shippori Mincho B1",serif;color:#f2ede2}
.footer-brand b{display:block;margin-top:.9rem;color:#fff;font-family:"Shippori Mincho B1",serif;letter-spacing:.12em;font-size:.97rem}
.footer-addr{font-size:.81rem;margin-top:.7rem;line-height:1.95}
.footer-nav{display:grid;grid-template-columns:1fr 1fr;gap:.5rem 2.2rem;font-size:.81rem}
.footer-nav a:hover{color:#e8b7a5}
.footer-bottom{max-width:var(--wrap);margin:2.4rem auto 0;padding-top:1.4rem;border-top:1px solid rgba(242,237,226,.2);font-size:.68rem;letter-spacing:.2em;color:rgba(242,237,226,.5)}

.reveal{opacity:0;transform:translateY(22px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1s cubic-bezier(.2,.7,.2,1)}
.reveal.on{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.12s}

@media(max-width:960px){
  .duo{grid-template-columns:1fr}
  .deflist .row{grid-template-columns:1fr;gap:.6rem}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:680px){
  .nav a:not(.nav-cta){display:none}
  .nav-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:36px;height:30px;background:none;border:0;cursor:pointer}
  .nav-toggle span{display:block;width:22px;height:1.5px;margin-left:auto;background:currentColor;transition:transform .25s,opacity .2s}
  .nav-toggle.on span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  .nav-toggle.on span:nth-child(2){opacity:0}
  .nav-toggle.on span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
  .nav.menu-open{position:fixed;inset:0;background:var(--paper);color:var(--ink);flex-direction:column;justify-content:center;align-items:center;gap:1.6rem}
  .nav.menu-open a:not(.nav-cta){display:block;font-size:1.05rem;letter-spacing:.18em}
  .bignum .s{grid-template-columns:4.4rem 1fr}
  .footer-top{flex-direction:column;gap:1.6rem}.footer-nav{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  .hero-halves span::before{transform:none!important}
  .reveal,.hero h1,.hero .sub,.hero-actions,.hero .lat,.duo .pair img{transition:none;opacity:1;transform:none;clip-path:none}
}

/* ---- 下層ページの細部 ---- */
.tiny{font-size:.78rem;color:var(--ink-3);line-height:1.9;margin-top:.5rem}
.mail{font-family:"Zen Kaku Gothic New",sans-serif;font-size:clamp(1.05rem,2.6vw,1.3rem);letter-spacing:.04em;color:var(--ai);margin:.3rem 0 0}
.contact-grid{max-width:58rem;gap:clamp(2rem,5vw,3.6rem);align-items:start}
.contact-grid h3{font-family:"Shippori Mincho B1",serif;font-size:1rem;letter-spacing:.12em;color:var(--ai);
  padding-bottom:.5rem;border-bottom:1px solid var(--hair);margin-bottom:.9rem}
.contact-grid p{line-height:2}
.form{max-width:none;margin-top:1.2rem}
.form label{font-size:.77rem;letter-spacing:.09em;color:var(--ink-3);display:block}
.form input,.form textarea{font-family:inherit;font-size:.95rem;line-height:1.8;letter-spacing:.02em;margin-top:.35rem}
.form input:disabled,.form textarea:disabled{background:var(--paper-2);color:var(--ink-3);cursor:not-allowed}
.form .btn:disabled{opacity:.45;cursor:not-allowed;pointer-events:none}
.form .btn{justify-self:start}

.note-line a{color:inherit;text-decoration:underline;text-underline-offset:3px}
.note-line a:hover{color:var(--shu)}

/* ---- ロゴ（支給の丸いマーク） ----
   写真の上でも紙の上でも読めるよう、影だけ添えて素のまま置く */
.brand img.mono,.footer-brand img.mono{border:0;background:none;padding:0;object-fit:contain;display:block;flex:none}
.brand img.mono{width:36px;height:36px;filter:drop-shadow(0 1px 5px rgba(0,0,0,.3))}
.site-header.solid .brand img.mono{filter:none}
.footer-brand img.mono{width:42px;height:42px}