/* ===== ReINX — base ===== */
:root{
  --navy:#0C2C3F;
  --navy-deep:#081E2C;
  --ink:#23282B;
  --cream:#F6F3EE;
  --cream-2:#EEE9E1;
  --line:#D8D1C5;
  --brass:#A98A5E;
  --brass-d:#8C7048;
  --white:#FFFFFF;
  --muted:#6E6A63;
  --serif:"Shippori Mincho", serif;
  --sans:"Noto Sans JP", sans-serif;
  --en:"Cormorant Garamond", serif;
  --maxw:1160px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--cream);
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  letter-spacing:.02em;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
.container{width:90%;max-width:var(--maxw);margin:0 auto;}
.pc-only{display:inline;}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:100;
  transition:background .4s var(--ease), box-shadow .4s var(--ease), padding .4s var(--ease);
  padding:18px 0;
}
.header.is-scrolled{
  background:rgba(246,243,238,.92);
  backdrop-filter:blur(8px);
  box-shadow:0 1px 0 rgba(0,0,0,.05);
  padding:10px 0;
}
.header__inner{
  width:90%;max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
}
.header__logo img{height:46px;width:auto;transition:height .4s var(--ease);}
.header.is-scrolled .header__logo img{height:38px;}
.nav{display:flex;align-items:center;gap:30px;}
.nav a{
  font-family:var(--en);
  font-size:15px;letter-spacing:.12em;
  color:var(--white);
  position:relative;transition:opacity .3s;
}
.header.is-scrolled .nav a{color:var(--navy);}
.nav a:not(.nav__cta)::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;
  background:currentColor;transition:width .3s var(--ease);
}
.nav a:not(.nav__cta):hover::after{width:100%;}
.nav__cta{
  font-family:var(--sans)!important;font-size:13px!important;letter-spacing:.08em;
  border:1px solid currentColor;border-radius:2px;padding:9px 18px;
}
.nav__cta:hover{background:var(--white);color:var(--navy)!important;border-color:var(--white);}
.header.is-scrolled .nav__cta:hover{background:var(--navy);color:var(--white)!important;border-color:var(--navy);}
.nav__toggle{display:none;background:none;border:0;cursor:pointer;width:32px;height:24px;position:relative;}
.nav__toggle span{position:absolute;left:0;width:100%;height:2px;background:var(--white);transition:.3s var(--ease);}
.header.is-scrolled .nav__toggle span{background:var(--navy);}
.nav__toggle span:nth-child(1){top:0;}
.nav__toggle span:nth-child(2){top:11px;}
.nav__toggle span:nth-child(3){top:22px;}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  background:var(--navy);color:var(--white);overflow:hidden;
}
.hero__bg{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 80% 10%, rgba(169,138,94,.16), transparent 60%),
    linear-gradient(180deg, var(--navy-deep), var(--navy) 60%, #0e3245);
}
.hero__bg::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(80% 70% at 70% 30%,#000,transparent 75%);
}
.hero__inner{position:relative;width:90%;max-width:var(--maxw);margin:0 auto;}
.hero__en{
  font-family:var(--en);letter-spacing:.34em;font-size:15px;
  color:var(--brass);margin-bottom:26px;
  opacity:0;transform:translateY(20px);animation:fadeUp 1s var(--ease) .2s forwards;
}
.hero__title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(2.4rem,6vw,4.4rem);line-height:1.45;letter-spacing:.06em;
  margin-bottom:30px;
  opacity:0;transform:translateY(24px);animation:fadeUp 1.1s var(--ease) .4s forwards;
}
.hero__lead{
  font-size:clamp(.95rem,1.4vw,1.05rem);font-weight:300;line-height:2.2;
  color:rgba(255,255,255,.85);margin-bottom:46px;
  opacity:0;transform:translateY(24px);animation:fadeUp 1.1s var(--ease) .6s forwards;
}
.hero__actions{display:flex;gap:18px;flex-wrap:wrap;
  opacity:0;transform:translateY(24px);animation:fadeUp 1.1s var(--ease) .8s forwards;}
.hero__scroll{
  position:absolute;left:50%;bottom:30px;transform:translateX(-50%);
  font-family:var(--en);font-size:12px;letter-spacing:.24em;color:rgba(255,255,255,.7);
  display:flex;flex-direction:column;align-items:center;gap:48px;
}
.hero__scroll::after{content:"";width:1px;height:40px;background:rgba(255,255,255,.5);position:absolute;bottom:-46px;animation:scrollLine 2s var(--ease) infinite;}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}51%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--sans);font-size:15px;letter-spacing:.06em;
  padding:16px 36px;border-radius:2px;transition:.35s var(--ease);
  border:1px solid transparent;
}
.btn--lg{padding:19px 48px;font-size:16px;}
.btn--light{background:var(--white);color:var(--navy);}
.btn--light:hover{background:var(--brass);color:var(--white);}
.btn--ghost{border-color:rgba(255,255,255,.5);color:var(--white);}
.btn--ghost:hover{background:rgba(255,255,255,.1);border-color:var(--white);}
.btn--line{background:#06C755;color:var(--white);}
.btn--line:hover{background:#05a948;}

/* ===== Sections ===== */
.section{padding:120px 0;}
.section__head{margin-bottom:64px;text-align:center;}
.section__en{
  font-family:var(--en);font-size:15px;letter-spacing:.3em;color:var(--brass);
  display:block;margin-bottom:14px;
}
.section__en--light{color:var(--brass);}
.section__title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(1.6rem,3.2vw,2.3rem);letter-spacing:.08em;color:var(--navy);
}
.section__title--light{color:var(--white);}
.section__note{margin-top:18px;color:var(--muted);font-size:15px;font-weight:300;}
.section__note--light{color:rgba(255,255,255,.8);}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .9s var(--ease), transform .9s var(--ease);}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ===== Concept ===== */
.concept__body{
  display:grid;grid-template-columns:1fr 1.2fr;gap:60px;align-items:center;
}
.concept__catch{
  font-family:var(--serif);font-weight:600;font-size:clamp(1.5rem,2.6vw,2rem);
  line-height:1.8;letter-spacing:.06em;color:var(--navy);
  border-left:2px solid var(--brass);padding-left:28px;
}
.concept__text p{margin-bottom:22px;color:#43484a;font-weight:300;}
.concept__text p:last-child{margin-bottom:0;}

/* ===== Reason ===== */
.reason{background:var(--cream-2);}
.reason__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}
.reason__card{
  background:var(--white);padding:50px 36px;border-radius:3px;
  border:1px solid var(--line);transition:.4s var(--ease);
}
.reason__card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(12,44,63,.1);}
.reason__num{font-family:var(--en);font-size:42px;color:var(--brass);line-height:1;}
.reason__card h3{
  font-family:var(--serif);font-weight:600;font-size:1.25rem;line-height:1.6;
  letter-spacing:.04em;color:var(--navy);margin:18px 0 16px;
}
.reason__card p{font-size:14.5px;font-weight:300;color:#50555a;}

/* ===== Service ===== */
.service__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line);}
.service__item{
  padding:48px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--white);transition:.4s var(--ease);
}
.service__item:hover{background:var(--navy);}
.service__item:hover h3,.service__item:hover p{color:var(--white);}
.service__item:hover h3 small{color:var(--brass);}
.service__item h3{
  font-family:var(--serif);font-weight:600;font-size:1.5rem;line-height:1.5;
  letter-spacing:.04em;color:var(--navy);margin-bottom:18px;transition:color .4s var(--ease);
}
.service__item h3 small{display:block;font-size:.85rem;color:var(--muted);font-weight:500;margin-top:6px;}
.service__item p{font-size:14.5px;font-weight:300;color:#50555a;transition:color .4s var(--ease);}

/* ===== Works ===== */
.works__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.work{overflow:hidden;background:var(--white);border:1px solid var(--line);border-radius:3px;}
.work__img{
  aspect-ratio:4/3;background:linear-gradient(135deg,#1a4258,#0c2c3f);
  display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.work__img::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:32px 32px;
}
.work__img span{font-family:var(--en);letter-spacing:.24em;color:rgba(255,255,255,.5);font-size:14px;z-index:1;}
.work figcaption{padding:24px 26px;}
.work figcaption h3{font-family:var(--serif);font-weight:600;font-size:1.1rem;color:var(--navy);letter-spacing:.03em;margin-bottom:8px;line-height:1.6;}
.work figcaption p{font-size:13px;color:var(--brass-d);letter-spacing:.06em;font-weight:500;}
.works__caption{text-align:center;margin-top:40px;color:var(--muted);font-size:13px;font-weight:300;}

/* ===== Flow ===== */
.flow{background:var(--cream-2);}
.flow__list{max-width:760px;margin:0 auto;position:relative;}
.flow__list::before{content:"";position:absolute;left:14px;top:8px;bottom:8px;width:1px;background:var(--line);}
.flow__step{position:relative;padding:0 0 44px 60px;}
.flow__step:last-child{padding-bottom:0;}
.flow__step::before{content:"";position:absolute;left:8px;top:6px;width:13px;height:13px;border-radius:50%;background:var(--brass);box-shadow:0 0 0 5px var(--cream-2);}
.flow__num{font-family:var(--en);font-size:14px;letter-spacing:.18em;color:var(--brass-d);}
.flow__step h3{font-family:var(--serif);font-weight:600;font-size:1.2rem;color:var(--navy);margin:4px 0 8px;letter-spacing:.04em;}
.flow__step p{font-size:14.5px;font-weight:300;color:#50555a;}

/* ===== Area ===== */
.area__body{max-width:760px;margin:0 auto;text-align:center;}
.area__main{font-family:var(--serif);font-size:1.3rem;color:var(--navy);letter-spacing:.05em;margin-bottom:40px;}
.area__list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-bottom:36px;text-align:left;}
.area__list li{background:var(--white);border:1px solid var(--line);border-radius:3px;padding:22px 28px;font-weight:300;color:#43484a;}
.area__list span{display:block;font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1.05rem;margin-bottom:4px;letter-spacing:.04em;}
.area__note{color:var(--muted);font-size:14px;font-weight:300;}

/* ===== Contact ===== */
.contact{background:var(--navy);position:relative;overflow:hidden;text-align:center;}
.contact::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(100% 80% at 50% 0%,rgba(169,138,94,.16),transparent 60%);
}
.contact .container{position:relative;}
.contact__actions{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.contact__note{margin-top:28px;color:rgba(255,255,255,.7);font-size:13px;font-weight:300;}

/* ===== Company ===== */
.company__table{max-width:760px;margin:0 auto;border-top:1px solid var(--line);}
.company__table > div{display:grid;grid-template-columns:200px 1fr;border-bottom:1px solid var(--line);}
.company__table dt{padding:22px 20px;font-family:var(--serif);font-weight:600;color:var(--navy);letter-spacing:.04em;background:var(--cream-2);}
.company__table dd{padding:22px 24px;font-weight:300;color:#43484a;}

/* ===== Footer ===== */
.footer{background:var(--navy-deep);color:var(--white);padding:64px 0 28px;}
.footer__inner{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap;}
.footer__logo{height:54px;width:auto;margin-bottom:16px;}
.footer__brand p{font-family:var(--serif);font-size:14px;color:rgba(255,255,255,.7);letter-spacing:.06em;}
.footer__nav{display:flex;gap:26px;flex-wrap:wrap;}
.footer__nav a{font-family:var(--en);font-size:14px;letter-spacing:.12em;color:rgba(255,255,255,.8);transition:color .3s;}
.footer__nav a:hover{color:var(--brass);}
.footer__copy{text-align:center;margin-top:48px;font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.45);}

/* ===== Responsive ===== */
@media (max-width:900px){
  .concept__body{grid-template-columns:1fr;gap:36px;}
  .reason__grid{grid-template-columns:1fr;}
  .works__grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:88px 0;}
}
@media (max-width:768px){
  .pc-only{display:none;}
  .nav{
    position:fixed;top:0;right:0;height:100vh;width:78%;max-width:320px;
    background:var(--navy);flex-direction:column;justify-content:center;gap:30px;
    transform:translateX(100%);transition:transform .45s var(--ease);box-shadow:-10px 0 40px rgba(0,0,0,.25);
  }
  .nav.is-open{transform:translateX(0);}
  .nav a{color:var(--white)!important;font-size:17px;}
  .header.is-scrolled .nav a{color:var(--white)!important;}
  .nav__toggle{display:block;z-index:101;}
  .nav__toggle.is-active span:nth-child(1){top:11px;transform:rotate(45deg);background:var(--white);}
  .nav__toggle.is-active span:nth-child(2){opacity:0;}
  .nav__toggle.is-active span:nth-child(3){top:11px;transform:rotate(-45deg);background:var(--white);}
}
@media (max-width:600px){
  .service__grid{grid-template-columns:1fr;}
  .works__grid{grid-template-columns:1fr;}
  .area__list{grid-template-columns:1fr;}
  .company__table > div{grid-template-columns:1fr;}
  .company__table dt{background:var(--cream-2);}
  .service__item{padding:36px 28px;}
  .reason__card{padding:40px 28px;}
  .btn{width:100%;}
  .hero__actions{width:100%;}
}