/* ============================================================
   Soliton Capital — site-wide design system
   Palette + type measured from the business card (design/色見.docx).
   Replaces the Bootstrap/legacy stylesheet for the restructured site.
   ============================================================ */
:root{
  --navy:#12213A;
  --red:#B3122B;
  --blue:#2B3A55;
  --cream:#F6F4EE;
  --gold:#B8996B;
  --gold-line: rgba(184,153,107,0.4);
  --serif:'Shippori Mincho', serif;
  --sans:'Noto Sans JP', sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
[id]{scroll-margin-top:100px;}
/* Outer <section>/<footer> anchor targets already carry their own
   generous top padding (100px section / 72px footer) — that padding
   alone clears the sticky header, so a smaller top-up is enough here.
   Stacking the full 100px on top of it left a large dead gap above
   the visible heading when jumping in from another page. */
#members,
#overview,
#services,
#cases,
#about,
#contact{
  scroll-margin-top:20px;
}
body{
  font-family:var(--sans);
  background:var(--cream);
  color:var(--navy);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{list-style:none;}

.wrap{max-width:1040px;margin:0 auto;padding:0 32px;}

/* ===== Header ===== */
.topbar{height:4px;background:var(--navy);}
header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,244,238,0.92);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--gold-line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 32px;max-width:1040px;margin:0 auto;
}
.logo{display:flex;align-items:center;gap:8px;font-size:15px;letter-spacing:.06em;font-family:var(--serif);}
.logo .star{color:var(--red);font-size:14px;}
.logo b{font-weight:600;}
.logo-block{display:flex;flex-direction:column;gap:0;}
.tagline{font-family:var(--serif);font-size:13px;color:var(--blue);letter-spacing:.01em;padding-left:22px;margin-top:-3px;}
nav.site-nav{display:flex;align-items:center;gap:32px;font-size:13px;letter-spacing:.04em;}
.nav-links{display:flex;gap:28px;}
.nav-links a{position:relative;padding:4px 0;color:var(--blue);}
.nav-links a:hover,
.nav-links a[aria-current="page"]{color:var(--red);}
.nav-lang{color:var(--gold);font-size:12px;letter-spacing:.08em;border-left:1px solid var(--gold-line);padding-left:24px;}
.nav-lang:hover{color:var(--red);}
.nav-toggle{
  display:none;background:none;border:0;font-size:22px;color:var(--navy);cursor:pointer;
  line-height:1;padding:4px;
  min-width:44px;min-height:44px;
  align-items:center;justify-content:center;
}

@media (max-width:760px){
  .header-inner{padding:16px 20px;}
  nav.site-nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:var(--cream);border-bottom:1px solid var(--gold-line);
    padding:8px 20px 20px;
  }
  nav.site-nav.open{display:flex;}
  .nav-links{flex-direction:column;gap:0;width:100%;}
  .nav-links a{display:block;padding:12px 0;border-bottom:1px solid var(--gold-line);width:100%;}
  .nav-lang{border-left:0;padding-left:0;padding-top:12px;display:block;}
  .nav-toggle{display:flex;}
}

/* ===== Hero ===== */
.hero{
  padding:140px 32px 120px;
  text-align:center;
  border-bottom:1px solid var(--gold-line);
}
.hero h1{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(28px,4vw,42px);
  line-height:1.75;
  max-width:720px;
  margin:0 auto 40px;
  letter-spacing:.03em;
}
.hero h1.hero-punch{
  font-size:clamp(30px,5vw,48px);
  line-height:1.35;
  max-width:780px;
  letter-spacing:.01em;
}
.hero p{
  max-width:520px;margin:0 auto;
  color:var(--blue);
  font-size:14.5px;
  line-height:2.1;
}

/* ===== Page header (non-home pages) ===== */
.page-hero{
  padding:128px 32px 100px;
  text-align:center;
  border-bottom:1px solid var(--gold-line);
}
.page-hero .eyebrow{display:inline-block;}
.page-hero h1{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(26px,3.6vw,36px);
  line-height:1.7;
  margin-top:20px;
}
.page-hero p{
  max-width:560px;margin:28px auto 0;
  color:var(--blue);font-size:14.5px;
  line-height:2;
}

/* ===== Section shell ===== */
section{padding:100px 32px;}
.section-head{max-width:680px;margin:0 auto 44px;}
.eyebrow{
  font-size:12px;color:var(--red);letter-spacing:.06em;margin-bottom:10px;
}
.section-title{
  font-family:var(--serif);font-weight:600;font-size:24px;
}
.section-lede{color:var(--blue);font-size:14px;margin-top:14px;max-width:520px;}

/* ===== Services (home teaser grid) ===== */
.services{background:#fff;border-top:1px solid var(--gold-line);border-bottom:1px solid var(--gold-line);}
.service-grid{
  max-width:1040px;margin:0 auto;
  display:grid;grid-template-columns:repeat(3,1fr);
  border-left:1px solid var(--gold-line);
}
.service{
  padding:36px 32px;border-right:1px solid var(--gold-line);border-bottom:1px solid var(--gold-line);
  display:block;
}
.service .num{font-family:var(--serif);font-size:13px;color:var(--gold);margin-bottom:8px;letter-spacing:.05em;}
.service h3{font-family:var(--serif);font-size:18px;font-weight:600;margin-bottom:8px;}
.service p{font-size:13.5px;color:var(--blue);}
a.service:hover{background:var(--cream);}
a.service:hover h3{color:var(--red);}

/* ===== Services (full detail page) ===== */
.service-detail-list{max-width:760px;margin:0 auto;}
.service-detail{
  padding:52px 0;border-bottom:1px solid var(--gold-line);
  display:grid;grid-template-columns:120px 1fr;gap:28px;
}
.service-detail:first-child{border-top:1px solid var(--gold-line);}
.service-detail .num{font-family:var(--serif);font-size:14px;color:var(--gold);padding-top:2px;letter-spacing:.05em;}
.service-detail h2{font-family:var(--serif);font-size:20px;font-weight:600;margin-bottom:16px;}
.service-detail p{font-size:14.5px;color:var(--blue);margin-bottom:14px;}
.service-detail p:last-child{margin-bottom:0;}
.industries-note{
  max-width:760px;margin:64px auto 0;padding:32px 36px;
  background:#fff;border-left:3px solid var(--gold);
  font-size:14px;color:var(--blue);
}

/* ===== Cases ===== */
.case-list{max-width:760px;margin:0 auto;}
.case{
  display:grid;grid-template-columns:120px 1fr;gap:20px;
  padding:32px 0;border-bottom:1px solid var(--gold-line);
}
.case:first-child{border-top:1px solid var(--gold-line);}
.case .tag{font-family:var(--serif);font-size:13px;color:var(--red);padding-top:2px;}
.case h4,.case h3{font-size:15px;font-weight:600;margin-bottom:10px;}
.case p{font-size:13.5px;color:var(--blue);margin-bottom:10px;}
.case p:last-child{margin-bottom:0;}
.case-note{
  max-width:760px;margin:40px auto 0;font-size:12.5px;color:var(--gold);text-align:center;
}

/* ===== Members ===== */
.members{background:#fff;border-top:1px solid var(--gold-line);border-bottom:1px solid var(--gold-line);}
.members-inner{
  max-width:760px;margin:0 auto;
  display:flex;align-items:center;gap:40px;flex-wrap:wrap;
}
.members-text p{font-size:13.5px;color:var(--blue);max-width:420px;}
.members-text a{color:var(--red);font-size:13px;white-space:nowrap;}

/* ===== Members grid (About page) ===== */
.members-grid{
  max-width:760px;margin:0 auto;
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
}
.member-card{text-align:center;}
.member-card .index{
  font-family:var(--serif);font-size:20px;color:var(--gold);
  letter-spacing:.06em;margin-bottom:12px;
}
.member-card .name{font-family:var(--serif);font-size:15px;font-weight:600;}
.member-card .title{font-size:12px;color:var(--red);margin-top:4px;}
.member-card:hover .name{color:var(--red);}
@media (max-width:600px){
  .members-grid{grid-template-columns:repeat(2,1fr);}
}

/* ===== Member profiles (full bios) ===== */
.profile-list{max-width:680px;margin:64px auto 0;}
.profile{padding:44px 0;border-top:1px solid var(--gold-line);}
.profile:last-child{border-bottom:1px solid var(--gold-line);}
.profile .name{font-family:var(--serif);font-size:20px;font-weight:600;}
.profile .title{font-size:12.5px;color:var(--red);margin-top:4px;margin-bottom:18px;}
.profile p{font-size:14px;color:var(--blue);margin-bottom:14px;}
.profile p:last-child{margin-bottom:0;}
.back-to-top{display:inline-block;margin-top:16px;font-size:12px;color:var(--gold);}
.back-to-top:hover{color:var(--red);}

/* ===== Philosophy (tier-4 teaser on home) ===== */
.philosophy{max-width:680px;margin:0 auto;}
.philo-box{
  background:#fff;border-left:3px solid var(--gold);
  padding:32px 36px;font-family:var(--serif);font-size:15px;line-height:1.95;color:var(--blue);
}
.philo-box .readtime{font-family:var(--sans);font-size:11.5px;color:var(--gold);margin-bottom:10px;display:block;}
.philo-box a{display:inline-block;margin-top:12px;font-family:var(--sans);font-size:13px;color:var(--red);}

/* ===== Tier-4 accordion (About page) ===== */
.essay{max-width:680px;margin:0 auto;}
.essay-accordion{
  background:#fff;border-left:3px solid var(--gold);
}
.essay-accordion summary{
  list-style:none;cursor:pointer;
  padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.essay-accordion summary::-webkit-details-marker{display:none;}
.essay-accordion summary .summary-text{
  font-family:var(--serif);font-size:16px;font-weight:600;color:var(--navy);
}
.essay-accordion summary .readtime{font-size:11.5px;color:var(--gold);display:block;margin-bottom:6px;font-family:var(--sans);}
.essay-accordion summary .chevron{
  font-size:13px;color:var(--gold);flex-shrink:0;transition:transform .25s ease;
}
.essay-accordion[open] summary .chevron{transform:rotate(180deg);}
.essay-body{
  padding:0 36px 36px;font-family:var(--serif);font-size:15px;line-height:2;color:var(--blue);
}
.essay-body p{margin-bottom:16px;}
.essay-body p:last-child{margin-bottom:0;}
.essay-body .credit{font-family:var(--sans);font-size:12px;color:var(--gold);}

/* ===== About: opening / intro ===== */
.about-lead{max-width:680px;margin:0 auto;text-align:center;}
.about-lead h1{
  font-family:var(--serif);font-weight:600;font-size:clamp(22px,3vw,28px);
  line-height:1.75;
}
.about-lead h1.lead-punch{
  font-size:clamp(28px,4.2vw,38px);
  line-height:1.6;
}
.about-lead p{
  margin-top:24px;color:var(--blue);font-size:14.5px;line-height:2;
}
.about-intro{max-width:680px;margin:0 auto;}
.about-intro p{font-size:14.5px;color:var(--blue);margin-bottom:16px;}
.about-intro p:last-child{margin-bottom:0;}

/* ===== Company overview table ===== */
.overview{max-width:680px;margin:0 auto;}
.overview-table{width:100%;border-top:1px solid var(--gold-line);}
.overview-row{
  display:grid;grid-template-columns:140px 1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--gold-line);
  font-size:14px;
}
.overview-row dt{font-weight:600;color:var(--navy);}
.overview-row dd{color:var(--blue);}
.overview-row dd a{color:var(--red);}
@media (max-width:600px){
  .overview-row{grid-template-columns:1fr;gap:4px;}
}

/* ===== Books ===== */
.book-list{max-width:760px;margin:0 auto;}
.book-item{
  display:grid;grid-template-columns:88px 1fr;gap:24px;align-items:start;
  padding:32px 0;border-bottom:1px solid var(--gold-line);
}
.book-item:first-child{border-top:1px solid var(--gold-line);}
.book-item img{border:1px solid var(--gold-line);}
.book-item .book-title{font-family:var(--serif);font-size:16px;font-weight:600;color:var(--navy);margin-bottom:6px;}
.book-item .book-title-sub{font-family:var(--serif);font-size:14px;font-weight:600;color:var(--navy);margin-bottom:6px;}
.book-item .book-meta{font-size:12.5px;color:var(--blue);}
.book-item a.book-link{display:block;}
.book-item a.book-link:hover .book-title{color:var(--red);}
@media (max-width:500px){
  .book-item{grid-template-columns:64px 1fr;gap:16px;}
}

/* ===== Footer ===== */
footer{background:var(--navy);color:var(--cream);padding:72px 32px 32px;}
.footer-inner{max-width:1040px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:48px;}
.footer-brand .logo{color:var(--cream);}
.footer-contact{margin-top:16px;font-size:12.5px;color:rgba(246,244,238,0.65);line-height:1.9;}
.footer-contact a{color:rgba(246,244,238,0.85);}
.footer-contact a:hover{color:#fff;}
.footer-links{display:flex;gap:24px;font-size:13px;flex-wrap:wrap;}
.footer-links a{color:rgba(246,244,238,0.75);}
.footer-links a:hover{color:#fff;}
.footer-lang{display:block;margin-top:14px;font-size:12px;color:var(--gold);}
.footer-lang:hover{color:#fff;}
.copyright{max-width:1040px;margin:32px auto 0;font-size:11.5px;color:rgba(246,244,238,0.45);border-top:1px solid rgba(246,244,238,0.15);padding-top:20px;}

/* ===== "More" link ===== */
.more-link{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--navy);font-size:13px;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;padding-bottom:4px;
  border-bottom:1px solid var(--gold);
  transition:color .25s ease, border-color .25s ease;
}
.more-link:hover{color:var(--red);border-color:var(--red);}
.more-link .arrow{transition:transform .25s ease;}
.more-link:hover .arrow{transform:translateX(4px);}

@media (max-width:760px){
  .service-grid{grid-template-columns:1fr;border-left:0;}
  .service{border-left:1px solid var(--gold-line);}
  .case{grid-template-columns:1fr;gap:8px;}
  .service-detail{grid-template-columns:1fr;gap:8px;}
  .members-inner{flex-direction:column;text-align:center;}
  .members-inner a{margin-left:0 !important;}
  section{padding:64px 20px;}
  .hero{padding:88px 20px 72px;}
  .page-hero{padding:76px 20px 56px;}
  .footer-inner{gap:28px;}
  [id]{scroll-margin-top:80px;}
}