/* ==========================================================================
   Distributed Ledgers — refined minimal
   Monochrome, native scroll, fluid type, light + dark.
   Keeps the original brand: Gilroy, hairline grid rules, austere palette.
   ========================================================================== */

@font-face{font-family:Gilroy;src:url(../../static/fonts/Gilroy/Gilroy-Medium.woff2) format("woff2"),
  url(../../static/fonts/Gilroy/Gilroy-Medium.woff) format("woff");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:Gilroy;src:url(../../static/fonts/Gilroy/Gilroy-ExtraBold.woff2) format("woff2"),
  url(../../static/fonts/Gilroy/Gilroy-ExtraBold.woff) format("woff");font-weight:800;font-style:normal;font-display:swap}

:root{
  --bg:#fff;            --surface:#f7f7f7;   --surface-2:#f0f0f0;
  --ink:#111;           --ink-soft:#3d3d3d;  --muted:#6b6b6b;
  --line:#e4e4e4;       --line-strong:#c9c9c9;
  --accent:#111;
  --measure:68ch;
  --gutter:clamp(1.25rem,5vw,4rem);
  --shell:1240px;
  --r:14px;
  --sans:Gilroy,"Helvetica Neue",Helvetica,-apple-system,BlinkMacSystemFont,"Segoe UI",
         "Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif;
  --step:clamp(4rem,9vw,7.5rem);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --bg:#0c0c0d;       --surface:#141416;   --surface-2:#1b1b1e;
    --ink:#f4f4f5;      --ink-soft:#d4d4d8;  --muted:#9b9ba3;
    --line:#26262a;     --line-strong:#3a3a41;
    --accent:#f4f4f5;
  }
}
:root[data-theme=dark]{
  --bg:#0c0c0d;         --surface:#141416;   --surface-2:#1b1b1e;
  --ink:#f4f4f5;        --ink-soft:#d4d4d8;  --muted:#9b9ba3;
  --line:#26262a;       --line-strong:#3a3a41;
  --accent:#f4f4f5;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:5.5rem}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-weight:500;
  font-size:clamp(1rem,.96rem + .2vw,1.0625rem);line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px}

h1,h2,h3{font-weight:800;line-height:1.08;letter-spacing:-.025em;margin:0}
h1{font-size:clamp(2.5rem,1.6rem + 4.2vw,5rem)}
h2{font-size:clamp(1.9rem,1.4rem + 2.1vw,3rem)}
h3{font-size:clamp(1.15rem,1.05rem + .5vw,1.45rem);letter-spacing:-.015em}
p{margin:0}
:lang(ja) h1,:lang(ja) h2,:lang(ja) h3{letter-spacing:-.01em;line-height:1.3}
:lang(ja) body,:lang(ja) p{line-height:1.85}

.shell{width:min(100% - var(--gutter)*2,var(--shell));margin-inline:auto}
.section{padding-block:var(--step);border-top:1px solid var(--line)}
.section--plain{border-top:0}
.eyebrow{
  font-size:.75rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:1.25rem;display:flex;align-items:center;gap:.75rem;
}
.eyebrow::after{content:"";height:1px;flex:1;background:var(--line)}
.lede{font-size:clamp(1.05rem,1rem + .35vw,1.25rem);color:var(--ink-soft);max-width:var(--measure)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .2s,background .2s;
}
.site-header[data-stuck]{border-bottom-color:var(--line)}
.site-header__in{display:flex;align-items:center;gap:1.5rem;height:4.5rem}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;flex-shrink:0}
.brand__mark{width:34px;height:34px;flex:none}
/* The wordmark SVG is dark ink; invert it on a dark ground. */
:root[data-theme=dark] .brand__mark{filter:invert(1)}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]) .brand__mark{filter:invert(1)}
}
.brand__mark path{fill:var(--ink)}
.brand__text{font-weight:800;font-size:.95rem;line-height:1.1;letter-spacing:-.01em}
.brand__text span{display:block;color:var(--muted);font-weight:500;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase}
.nav{display:flex;gap:.35rem;margin-left:auto;align-items:center}
.nav a{
  text-decoration:none;font-size:.92rem;color:var(--muted);padding:.45rem .8rem;border-radius:99px;
  transition:color .18s,background .18s;white-space:nowrap;
}
.nav a:hover{color:var(--ink);background:var(--surface-2)}
.nav a[aria-current=true]{color:var(--ink);background:var(--surface-2)}
.header-tools{display:flex;align-items:center;gap:.5rem;flex-shrink:0}
.lang{display:flex;align-items:center;border:1px solid var(--line);border-radius:99px;overflow:hidden}
.lang a,.lang span{padding:.3rem .6rem;font-size:.75rem;font-weight:800;text-decoration:none;letter-spacing:.04em}
.lang span{background:var(--ink);color:var(--bg)}
.lang a{color:var(--muted)}
.lang a:hover{color:var(--ink)}
.icon-btn{
  width:2.1rem;height:2.1rem;display:grid;place-items:center;border:1px solid var(--line);
  border-radius:99px;background:none;color:var(--muted);cursor:pointer;padding:0;
}
.icon-btn:hover{color:var(--ink);border-color:var(--line-strong)}
.icon-btn svg{width:16px;height:16px}
.nav-toggle{display:none}

/* ---------- hero ---------- */
.hero{padding-block:clamp(4.5rem,13vw,10rem) var(--step)}
.hero h1{max-width:16ch;text-wrap:balance}
.hero__rule{width:clamp(4rem,10vw,7rem);height:3px;background:var(--ink);margin:2rem 0 1.75rem}
.hero .lede{max-width:52ch}
.hero__cta{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2.5rem}

.btn{
  display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 1.5rem;border-radius:99px;
  font-weight:800;font-size:.95rem;text-decoration:none;border:1px solid var(--ink);
  background:var(--ink);color:var(--bg);transition:transform .16s,opacity .16s;
}
.btn:hover{transform:translateY(-1px);opacity:.88}
.btn--ghost{background:none;color:var(--ink);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--ink);background:var(--surface-2)}
.btn svg{width:15px;height:15px}

/* ---------- services ---------- */
.cards{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:3rem}
@media (min-width:52rem){.cards{grid-template-columns:repeat(3,1fr)}}
.card{
  background:var(--bg);padding:clamp(1.75rem,3vw,2.5rem);display:flex;flex-direction:column;gap:1rem;
  text-decoration:none;transition:background .2s;
}
.card:hover{background:var(--surface)}
.card__num{font-size:.75rem;font-weight:800;letter-spacing:.14em;color:var(--muted)}
.card h3{text-wrap:balance}
.card p{color:var(--muted);font-size:.95rem;flex:1}
.card__go{display:inline-flex;align-items:center;gap:.4rem;font-weight:800;font-size:.9rem;color:var(--ink)}
.card__go svg{width:14px;height:14px;transition:transform .2s}
.card:hover .card__go svg{transform:translateX(4px)}

/* ---------- mission / prose ---------- */
.prose{max-width:var(--measure);display:grid;gap:1.4rem;color:var(--ink-soft);margin-top:2.5rem}
.prose p{font-size:clamp(1.02rem,.98rem + .3vw,1.15rem)}
.split{display:grid;gap:clamp(2rem,5vw,4rem)}
@media (min-width:56rem){.split{grid-template-columns:minmax(0,22ch) minmax(0,1fr);align-items:start}}

/* ---------- clients ---------- */
.clients{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:3rem}
@media (min-width:40rem){.clients{grid-template-columns:repeat(2,1fr)}}
@media (min-width:64rem){.clients{grid-template-columns:repeat(3,1fr)}}
.client{background:var(--bg);padding:clamp(1.5rem,2.6vw,2rem);display:flex;flex-direction:column;gap:.85rem;transition:background .2s}
.client:hover{background:var(--surface)}
.client__logo{width:52px;height:52px;object-fit:contain;filter:grayscale(1);opacity:.85}
:root[data-theme=dark] .client__logo{filter:grayscale(1) invert(1);opacity:.9}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]) .client__logo{filter:grayscale(1) invert(1);opacity:.9}
}
.client__name{font-weight:800;font-size:1.05rem;text-decoration:none;display:inline-flex;align-items:center;gap:.35rem}
.client__name[href]:hover{text-decoration:underline;text-underline-offset:3px}
.client__name svg{width:12px;height:12px;opacity:.5}
.client__role{font-size:.83rem;color:var(--muted);font-style:italic}
.client__work{font-size:.9rem;color:var(--ink-soft)}

/* ---------- facts (JP company info) ---------- */
.facts{margin-top:2.5rem;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.facts div{display:grid;gap:.15rem;padding:1.1rem clamp(1.1rem,2.4vw,1.6rem);border-bottom:1px solid var(--line)}
@media (min-width:44rem){.facts div{grid-template-columns:minmax(0,14rem) minmax(0,1fr);gap:1.5rem;align-items:baseline}}
.facts div:last-child{border-bottom:0}
.facts dt{font-weight:800;font-size:.85rem;color:var(--muted)}
.facts dd{margin:0;color:var(--ink-soft)}

/* ---------- contact ---------- */
.contact-grid{display:grid;gap:clamp(2rem,4vw,3rem);margin-top:3rem}
@media (min-width:52rem){.contact-grid{grid-template-columns:repeat(2,1fr)}}
.office{border-top:2px solid var(--ink);padding-top:1.1rem}
.office h3{font-size:1.05rem;margin-bottom:.5rem}
.office p{color:var(--muted);font-size:.95rem;max-width:34ch}
.contact-cta{margin-top:3rem;padding:clamp(1.75rem,4vw,2.75rem);background:var(--surface);border-radius:var(--r);display:grid;gap:1.25rem}
@media (min-width:52rem){.contact-cta{grid-template-columns:1fr auto;align-items:center}}
.contact-cta h3{font-size:clamp(1.3rem,1.1rem + .9vw,1.9rem)}
.contact-cta p{color:var(--muted);margin-top:.4rem}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding-block:3rem;margin-top:var(--step)}
.site-footer__in{display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center;justify-content:space-between}
.socials{display:flex;gap:.5rem}
.socials a{
  width:2.2rem;height:2.2rem;display:grid;place-items:center;border:1px solid var(--line);
  border-radius:99px;color:var(--muted);transition:color .18s,border-color .18s;
}
.socials a:hover{color:var(--ink);border-color:var(--line-strong)}
.socials svg{width:16px;height:16px}
.colophon{font-size:.82rem;color:var(--muted)}
.colophon a{color:var(--muted)}

/* ---------- article (detail pages) ---------- */
.article{max-width:var(--measure);margin-top:2.5rem;display:grid;gap:1.5rem}
.article h2{font-size:clamp(1.35rem,1.15rem + .9vw,1.9rem);margin-top:1.5rem}
.article p{color:var(--ink-soft)}
.article ul{margin:0;padding-left:1.15rem;display:grid;gap:.6rem;color:var(--ink-soft)}
.article a{text-underline-offset:3px}
.back{display:inline-flex;align-items:center;gap:.5rem;font-size:.9rem;font-weight:800;color:var(--muted);text-decoration:none;margin-bottom:2rem}
.back:hover{color:var(--ink)}
.back svg{width:14px;height:14px}

/* ---------- reveal ---------- */
/* Content is visible by default. Only a JS-capable document opts into the
   entrance animation, so a script failure can never hide copy. */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s cubic-bezier(.22,1,.36,1),transform .6s cubic-bezier(.22,1,.36,1)}
  .js .reveal.is-in{opacity:1;transform:none}
}

/* ---------- small screens ---------- */
@media (max-width:52rem){
  .nav-toggle{display:grid;place-items:center}
  .nav{
    position:fixed;inset:4.5rem 0 auto;flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);border-bottom:1px solid var(--line);padding:.5rem var(--gutter) 1.25rem;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:.22s;
  }
  .nav[data-open]{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:.8rem .25rem;border-radius:0;border-bottom:1px solid var(--line);font-size:1rem}
  .nav a:last-child{border-bottom:0}
}