/* index.css — index.html 固有スタイル (共通は common.css) */

/* ---------- ribbons ---------- */
.ribbon{position:absolute;pointer-events:none;mix-blend-mode:multiply}

/* ---------- nav (centered in first view → docks to top on scroll) ---------- */
header.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  padding-top:52vh;
  background:rgba(251,244,226,var(--nav-bg,0));
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(95,77,64,calc(.16*var(--nav-bg,0)));
  transition:background .45s ease,border-color .45s ease;
  will-change:padding-top;
}
.nav-inner{position:relative;display:flex;align-items:center;justify-content:center;height:74px}
.nav-logo{position:absolute;left:0;top:50%;transform:translateY(-50%);opacity:var(--nav-fade,0);transition:opacity .45s ease}
.nav-logo img{height:30px;width:auto}
.nav-logo-hero{position:absolute;left:50%;bottom:100%;transform:translateX(-50%);margin-bottom:22px;
  opacity:calc(1 - var(--nav-fade,0));transition:opacity .35s ease}
.nav-logo-hero img{height:clamp(38px,5.2vw,70px);width:auto;display:block}
.hero-tag{display:block;text-align:center;font-family:"Antic Slab",serif;font-size:clamp(11px,1vw,14px);letter-spacing:.26em;text-transform:uppercase;color:var(--amber-deep);margin-bottom:16px;white-space:nowrap}
.nav-links{display:flex;gap:clamp(30px,4.4vw,58px);align-items:center;transition:gap .45s ease}
.nav-links a{font-family:"Antic Slab",serif;font-size:clamp(15px,1.15vw,18px);font-weight:400;letter-spacing:.16em;color:var(--brown-deep);position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--amber);transition:right .3s ease}
.nav-links a:hover::after{right:0}
.nav-cta{
  position:absolute;right:0;top:50%;transform:translateY(-50%);opacity:var(--nav-fade,0);
  background:var(--red);color:var(--cream);padding:11px 24px;border-radius:999px;
  font-family:"Antic Slab",serif;font-size:14px;letter-spacing:.12em;font-weight:400;
  box-shadow:0 10px 22px -12px rgba(155,48,35,.8);transition:transform .25s,box-shadow .25s,opacity .45s ease;
}
.nav-cta:hover{transform:translateY(-50%) translateY(-2px);box-shadow:0 16px 28px -12px rgba(155,48,35,.9)}
.nav-menu{display:contents}
.nav-toggle{display:none;position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:46px;height:46px;border:none;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:0;z-index:60}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--brown-deep);border-radius:2px;transition:transform .3s ease,opacity .25s ease}
header.nav.open .nav-toggle span:nth-child(1){transform:translateY(8px) rotate(45deg)}
header.nav.open .nav-toggle span:nth-child(2){opacity:0}
header.nav.open .nav-toggle span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
section[id]{scroll-margin-top:96px}

/* ---------- site background (fixed animated ribbons, parallax) ---------- */
.site-bg{position:fixed;inset:0;z-index:0;background:var(--cream);overflow:hidden;pointer-events:none;will-change:transform}
.site-bg svg{position:absolute;left:0;top:0;width:100%;height:130%;display:block;filter:blur(3px)}

/* ---------- hero (logo only, ribbons live in .site-bg) ---------- */
.hero{position:relative;background:transparent;overflow:hidden;min-height:calc(100vh - 74px);display:grid;place-items:center;z-index:1}
.hero-ribbons{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-ribbons svg{position:absolute;inset:0;width:100%;height:100%;display:block;filter:blur(3px)}
.hero-center{position:relative;z-index:3;display:grid;place-items:center;padding:40px;width:100%;transform:translateY(-11vh)}
.hero-logo-mobile{display:none}
.hero-tag-mobile{display:none}
.hero-glow{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:min(82vw,820px);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(251,244,226,1) 0%,rgba(251,244,226,.96) 38%,rgba(249,237,207,.7) 58%,rgba(249,237,207,0) 76%);z-index:1}
.hero-logo{position:absolute;left:50%;top:39%;transform:translate(-50%,-50%);
  width:clamp(320px,52vw,780px);height:auto;z-index:60;pointer-events:none}
@keyframes logoFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.hero-logo.intro{animation:logoIn 1.1s cubic-bezier(.2,.8,.2,1) both, logoFloat 7s ease-in-out 1.1s infinite}
@keyframes logoIn{from{opacity:0;transform:translateY(20px) scale(.96)}to{opacity:1;transform:none}}
.scroll-cue{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:3;
  font-family:"Antic Slab",serif;font-size:11px;letter-spacing:.3em;color:var(--brown);opacity:.7;
  display:flex;flex-direction:column;align-items:center;gap:9px}
.scroll-cue .line{width:1px;height:42px;background:var(--brown);transform-origin:top;animation:scrollLine 1.9s ease-in-out infinite}
@keyframes scrollLine{0%{transform:scaleY(.2);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}45.01%{transform-origin:bottom}100%{transform:scaleY(.05);transform-origin:bottom}}
@media (prefers-reduced-motion:reduce){.hero-logo{animation:logoIn .8s both}.scroll-cue .line{animation:none}}

/* shared buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .25s,box-shadow .25s;font-family:"Zen Maru Gothic"}
.btn-primary{background:var(--red);color:var(--cream);box-shadow:0 16px 32px -16px rgba(155,48,35,.9)}
.btn-primary:hover{transform:translateY(-3px)}
.btn-ghost{background:transparent;color:var(--brown-deep);border:1.5px solid var(--brown);}
.btn-ghost:hover{background:var(--brown);color:var(--cream)}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- section frame ---------- */
section.block{position:relative;z-index:1;padding:104px 0}
.sec-head{margin-bottom:56px;max-width:680px}
.sec-tag{display:inline-block;font-family:"Antic Slab",serif;font-size:14px;letter-spacing:.22em;color:var(--amber-deep);margin-bottom:14px;text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.4vw,40px);line-height:1.34}
.sec-head p{margin-top:18px;color:var(--brown);font-size:16px}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.svc-card{
  background:var(--paper);border:1px solid var(--line);border-radius:22px;
  padding:38px 32px 34px;position:relative;overflow:hidden;
  transition:transform .35s,box-shadow .35s;
}
.svc-card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.svc-card .num{font-family:"Antic Slab",serif;font-size:15px;color:var(--amber-deep);letter-spacing:.1em}
.svc-ic{width:88px;height:88px;border-radius:24px;display:grid;place-items:center;margin:20px 0 26px;box-shadow:0 12px 28px -16px rgba(70,56,46,.5)}
.svc-ic svg{width:46px;height:46px;stroke-width:1.6}
.svc-card > :not(.svc-bg){position:relative;z-index:1}
.svc-bg{position:absolute;right:-34px;bottom:-42px;width:240px;height:240px;z-index:0;pointer-events:none;opacity:.07}
.svc-bg svg{width:100%;height:100%;stroke-width:1}
.svc-card h3{font-size:21px;margin-bottom:14px}
.svc-title{margin-bottom:16px}
.svc-title .svc-sub{display:block;font-size:14px;font-weight:700;color:var(--brown);letter-spacing:.02em;margin-bottom:7px}
.svc-title .svc-en{display:block;font-family:"Antic Slab",serif;font-weight:400;font-size:34px;line-height:1.05;letter-spacing:.01em;color:var(--brown-deep)}
.svc-card p{font-size:14.5px;color:var(--brown);line-height:1.95}
.svc-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.svc-card .tags span{font-size:12px;background:var(--cream);color:var(--brown);padding:5px 12px;border-radius:999px;border:1px solid var(--line)}
.svc-more{display:inline-flex;align-items:center;gap:8px;margin-top:22px;font-family:"Antic Slab",serif;font-size:13px;letter-spacing:.1em;color:var(--brown-deep)}
.svc-more .arr{transition:transform .25s}
.svc-card:hover .svc-more .arr{transform:translateX(5px)}
.svc-card .edge{position:absolute;left:0;top:0;bottom:0;width:5px}

/* strengths */
.why{background:var(--cream);}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:10px}
.why-item{padding:6px 4px}
.why-item .wnum{font-family:"Antic Slab",serif;font-size:46px;color:var(--amber);line-height:1;display:block;margin-bottom:16px;opacity:.9}
.why-item h3{font-size:20px;margin-bottom:12px}
.why-item p{font-size:14.5px;color:var(--brown);line-height:1.95}
.why-divline{height:3px;width:46px;background:var(--red);margin-bottom:18px;border-radius:2px}

/* process */
.flow{position:relative}
.flow-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative}
.flow-steps::before{content:"";position:absolute;left:6%;right:6%;top:34px;height:2px;background:linear-gradient(90deg,var(--amber),var(--green-soft),var(--red));opacity:.5}
.flow-step{text-align:center;position:relative}
.flow-dot{width:68px;height:68px;border-radius:50%;background:var(--paper);border:2px solid var(--line);display:grid;place-items:center;margin:0 auto 22px;font-family:"Antic Slab",serif;font-size:22px;color:var(--brown-deep);position:relative;z-index:2;box-shadow:0 8px 20px -12px rgba(70,56,46,.4)}
.flow-step h3{font-size:16px;margin-bottom:8px}
.flow-step p{font-size:13px;color:var(--brown);line-height:1.8;padding:0 4px}

/* works */
.works{background:transparent}
.works-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:48px}
.works-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.work-card{position:relative;border-radius:22px;overflow:hidden;background:var(--cream);border:1px solid var(--line);transition:transform .35s,box-shadow .35s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.work-thumb{position:relative;aspect-ratio:154/81;background:var(--cream-deep)}
a.work-thumb{display:block;cursor:pointer}
.work-thumb-go{position:absolute;top:14px;right:14px;z-index:4;width:32px;height:32px;border-radius:50%;background:var(--cream);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--brown-deep);opacity:0;transform:translateY(-4px);transition:opacity .25s,transform .25s,background .2s,color .2s;pointer-events:none}
.work-thumb-go svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.work-card:hover .work-thumb-go{opacity:1;transform:translateY(0)}
.work-thumb-link:hover .work-thumb-go{background:var(--red);color:var(--cream);border-color:var(--red)}
.work-thumb image-slot{width:100%;height:100%;display:block}
.work-img{width:100%;height:100%;object-fit:contain;object-position:center;display:block;background:var(--cream-deep)}
.work-cat{position:absolute;top:16px;left:16px;z-index:3;font-family:"Antic Slab",serif;font-size:11px;letter-spacing:.14em;background:var(--brown-deep);color:var(--cream);padding:6px 13px;border-radius:999px}
.work-body{padding:24px 26px 28px}
.work-body h3{font-size:19px;margin-bottom:8px}
.work-body p{font-size:13.5px;color:var(--brown);line-height:1.85}
.work-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.work-meta span{font-size:11.5px;color:var(--brown);border:1px solid var(--line);padding:4px 11px;border-radius:999px}
.works-note{margin-top:30px;font-size:12.5px;color:var(--brown);opacity:.7;text-align:center}

/* company */
.about{background:transparent}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
.about-card{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:10px 34px;box-shadow:var(--shadow)}
.about-card dl{display:grid;grid-template-columns:118px 1fr}
.about-card dt,.about-card dd{padding:20px 4px;border-bottom:1px solid var(--line);font-size:14.5px}
.about-card .row:last-child dt,.about-card .row:last-child dd{border-bottom:none}
.about-card dt{color:var(--brown);font-weight:700;font-family:"Zen Maru Gothic"}
.about-card dd{color:var(--ink)}
.about-lead h2{font-size:clamp(26px,3.2vw,38px);line-height:1.4;margin-bottom:22px}
.about-lead p{color:var(--brown);font-size:15.5px;margin-bottom:16px;line-height:2}

/* cta */
.cta{position:relative;z-index:1;background:var(--brown-deep);color:var(--cream);overflow:hidden}
.cta .wrap{position:relative;z-index:2;text-align:center;padding:96px 28px}
.cta h2{color:var(--cream);font-size:clamp(28px,3.6vw,44px);line-height:1.36}
.cta p{color:rgba(249,237,207,.78);margin:22px auto 38px;max-width:34em;font-size:16px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-cream{background:var(--cream);color:var(--brown-deep)}
.btn-cream:hover{transform:translateY(-3px)}
.btn-outline-cream{border:1.5px solid rgba(249,237,207,.5);color:var(--cream)}
.btn-outline-cream:hover{background:rgba(249,237,207,.12)}
.cta-contact{display:flex;gap:40px;justify-content:center;flex-wrap:wrap;margin-top:46px;font-size:14px;color:rgba(249,237,207,.85)}
.cta-contact a{display:inline-flex;align-items:center;gap:10px}
.cta-contact .serifnum{font-size:19px;color:var(--cream)}

/* footer */
footer{position:relative;z-index:1;background:var(--ink);color:rgba(249,237,207,.7);padding:54px 0 30px}
.foot-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start;padding-bottom:34px;border-bottom:1px solid rgba(249,237,207,.14)}
.foot-logo img{height:30px;margin-bottom:16px}
.foot-logo p{font-size:13px;max-width:24em;line-height:1.9}
.foot-nav{display:flex;gap:50px;flex-wrap:wrap}
.foot-col h4{font-family:"Zen Maru Gothic";font-size:13px;color:var(--cream);margin-bottom:14px;letter-spacing:.04em}
.foot-col a{display:block;font-size:13.5px;padding:5px 0;color:rgba(249,237,207,.7);transition:color .2s}
.foot-col a:hover{color:var(--amber)}
.foot-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:24px;font-size:12px;color:rgba(249,237,207,.5)}
.foot-bottom .serifnum{letter-spacing:.08em}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

@media(max-width:920px){
  /* --- nav becomes a fixed top bar with hamburger --- */
  header.nav{padding-top:0 !important;background:transparent !important;border-bottom-color:transparent !important;backdrop-filter:none}
  header.nav.open{background:rgba(251,244,226,.96) !important;border-bottom:1px solid var(--line) !important;backdrop-filter:blur(12px)}
  .nav-inner{justify-content:flex-start;height:60px}
  .nav-logo{position:static;transform:none;opacity:1 !important;margin-right:auto}
  .nav-logo img{height:26px}
  .nav-logo{display:none}
  .nav-logo-hero{display:none !important}
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:60px;left:0;right:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(251,244,226,.98);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);box-shadow:0 24px 40px -28px rgba(70,56,46,.5);
    padding:6px 0 22px;
    transform:translateY(-14px);opacity:0;pointer-events:none;
    transition:opacity .28s ease,transform .28s ease;
    max-height:calc(100vh - 60px);overflow-y:auto;
  }
  header.nav.open .nav-menu{transform:none;opacity:1;pointer-events:auto}
  .nav-links{flex-direction:column;gap:0;width:100%}
  .nav-links a{font-size:16px;letter-spacing:.16em;padding:16px 28px;width:100%;text-align:center;color:var(--brown-deep)}
  .nav-links a::after{display:none}
  .nav-cta{position:static;transform:none;opacity:1 !important;display:inline-flex;margin:16px auto 6px;font-size:15px;padding:13px 30px}
  .nav-cta:hover{transform:translateY(-2px)}
  /* --- layout --- */
  .svc-grid,.why-grid{grid-template-columns:1fr}
  .flow-steps{grid-template-columns:1fr 1fr;gap:30px 18px}
  .flow-steps::before{display:none}
  .about-grid{grid-template-columns:1fr;gap:38px}
  .hero-center{transform:translateY(-6vh)}
  .hero-logo-mobile{display:block;width:min(74vw,380px);height:auto}
  .hero-tag-mobile{display:block;margin-bottom:18px}
  section.block{padding:80px 0}
  .sec-head{margin-bottom:42px}
}
@media(max-width:560px){
  .wrap{padding:0 20px}
  .flow-steps{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr}
  .bigmark{display:none}
  section.block{padding:64px 0}
  .works-head{flex-direction:column;align-items:flex-start}
  .cta .wrap{padding:72px 20px}
  .cta-contact{gap:20px}
  .foot-top{gap:24px}
  .foot-nav{gap:32px}
}