/* =========================================================
   nol.works — generative studio
   dark generative lab / terminal
   ========================================================= */

:root{
  --bg:        #0a0b0f;
  --bg-2:      #0e1014;
  --panel:     #101319;
  --line:      rgba(232,234,237,.09);
  --line-2:    rgba(232,234,237,.16);
  --ink:       #e8eaed;
  --ink-1:     #b7bcc4;
  --ink-2:     #7a818c;
  --ink-3:     #4a5058;
  --sig:       #4fd1e0;               /* cold signal — cyan */
  --sig-dim:   rgba(79,209,224,.16);
  --sig-glow:  rgba(79,209,224,.45);
  --radius:    14px;
  --mono:      'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sans:      'Space Grotesk', system-ui, -apple-system, sans-serif;
  --ease:      cubic-bezier(.22,1,.36,1);
  --gutter:    clamp(18px, 4.5vw, 64px);
}

*{ box-sizing:border-box; margin:0; padding:0; }

html{ -webkit-text-size-adjust:100%; }

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.5;
  overflow-x:hidden;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  cursor:auto;
}

body::before{ /* subtle film grain / vignette */
  content:"";
  position:fixed; inset:0;
  pointer-events:none; z-index:1;
  background:
    radial-gradient(120% 90% at 50% 0%, transparent 55%, rgba(0,0,0,.55) 100%),
    radial-gradient(80% 60% at 80% 100%, rgba(79,209,224,.05), transparent 60%);
  mix-blend-mode:normal;
}

a{ color:inherit; text-decoration:none; }
em{ font-style:normal; }

::selection{ background:var(--sig); color:#04140f; }

.skip-link{
  position:fixed; left:12px; top:-60px; z-index:200;
  background:var(--sig); color:#04140f; font-family:var(--mono);
  font-size:12px; padding:8px 14px; border-radius:8px;
  transition:top .2s var(--ease);
}
.skip-link:focus{ top:12px; outline:2px solid #fff; }

/* ---------- shared type ---------- */
.section-head{ margin-bottom:clamp(28px,5vw,56px); }
.section-head__idx{
  font-family:var(--mono); font-size:12px; letter-spacing:.16em;
  color:var(--sig); margin-bottom:14px; text-transform:uppercase;
}
.section-head__title{
  font-size:clamp(34px,7vw,84px); font-weight:500; letter-spacing:-.02em;
  line-height:.98; text-transform:lowercase;
}
.section-head__sub{
  margin-top:18px; max-width:46ch; color:var(--ink-2);
  font-family:var(--mono); font-size:13px; letter-spacing:.01em; line-height:1.7;
}

/* =========================================================
   custom cursor
   ========================================================= */
.cursor{ position:fixed; inset:0; pointer-events:none; z-index:150; display:none; }
.cursor__dot{
  position:fixed; top:0; left:0; width:5px; height:5px; border-radius:50%;
  background:var(--sig); transform:translate(-50%,-50%);
  box-shadow:0 0 10px var(--sig-glow);
}
.cursor__ring{
  position:fixed; top:0; left:0; width:38px; height:38px;
  border:1px solid var(--line-2); border-radius:50%;
  transform:translate(-50%,-50%);
  display:flex; align-items:center; justify-content:center;
  transition:width .3s var(--ease), height .3s var(--ease),
             border-color .3s var(--ease), background-color .3s var(--ease);
}
.cursor__coords{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.06em;
  color:var(--ink-2); white-space:nowrap; transform:translateY(26px);
  opacity:.85;
}
.cursor.is-hover .cursor__ring{ width:64px; height:64px; border-color:var(--sig); }
.cursor.is-view  .cursor__ring{
  width:88px; height:88px; border-color:var(--sig);
  background:var(--sig-dim);
}
.cursor.is-view .cursor__ring::after{
  content:"view"; font-family:var(--mono); font-size:10px;
  letter-spacing:.14em; color:var(--sig);
}
.cursor.is-view .cursor__coords{ display:none; }
.cursor.is-down .cursor__ring{ transform:translate(-50%,-50%) scale(.82); }

body.has-cursor,
body.has-cursor a,
body.has-cursor button{ cursor:none; }

/* =========================================================
   corner frame HUD
   ========================================================= */
.frame{ position:fixed; inset:0; z-index:90; pointer-events:none;
        font-family:var(--mono); color:var(--ink-3); }
.frame__mark{ position:fixed; font-size:18px; line-height:1; opacity:.6; }
.frame__mark--tl{ top:14px; left:14px; }
.frame__mark--tr{ top:14px; right:14px; }
.frame__mark--bl{ bottom:14px; left:14px; }
.frame__mark--br{ bottom:14px; right:14px; }
.frame__label{ position:fixed; bottom:16px; font-size:10.5px; letter-spacing:.14em; }
.frame__label--l{ left:36px; }
.frame__label--r{ right:36px; color:var(--ink-2); }
@media (max-width:720px){
  .frame__mark, .frame__label--l{ display:none; }
  .frame__label--r{ right:16px; bottom:12px; }
}

/* =========================================================
   NAV
   ========================================================= */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  gap:24px; padding:18px var(--gutter);
  transition:transform .5s var(--ease), background-color .4s var(--ease),
             backdrop-filter .4s var(--ease), border-color .4s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(10,11,15,.72);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom-color:var(--line);
  padding-top:14px; padding-bottom:14px;
}
.nav.is-hidden{ transform:translateY(-105%); }

.nav__brand{ display:flex; align-items:center; gap:2px; font-family:var(--mono);
             font-size:16px; font-weight:600; letter-spacing:-.01em; }
.nav__brand-mark{ color:var(--ink); }
.nav__brand-dot{ color:var(--sig); }
.nav__caret{
  width:8px; height:15px; background:var(--sig); margin-left:6px;
  animation:blink 1.05s steps(1) infinite;
}
@keyframes blink{ 50%{ opacity:0; } }

.nav__links{ display:flex; gap:26px; }
.nav__links a{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.02em;
  color:var(--ink-1); position:relative; padding:4px 0;
  display:inline-flex; align-items:baseline; gap:7px;
  transition:color .25s var(--ease);
}
.nav__links a em{ color:var(--ink-3); font-size:11px; }
.nav__idx{ color:var(--sig); font-size:9.5px; opacity:.8; }
.nav__links a::after{
  content:""; position:absolute; left:0; bottom:-2px; height:1px; width:0;
  background:var(--sig); transition:width .3s var(--ease);
}
.nav__links a:hover, .nav__links a:focus-visible{ color:var(--ink); outline:none; }
.nav__links a:hover::after, .nav__links a:focus-visible::after{ width:100%; }

.nav__seed{ font-family:var(--mono); font-size:11px; color:var(--ink-3);
            letter-spacing:.08em; }
.nav__seed span{ color:var(--ink-1); }

@media (max-width:820px){
  .nav__links{ display:none; }
  .nav__seed{ display:none; }
}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative; min-height:100svh; display:flex; flex-direction:column;
  justify-content:center; padding:120px var(--gutter) 88px; overflow:hidden;
}
.hero__canvas{ position:absolute; inset:0; width:100%; height:100%;
               z-index:0; display:block;
  -webkit-mask-image:radial-gradient(130% 100% at 50% 42%, #000 40%, transparent 92%);
          mask-image:radial-gradient(130% 100% at 50% 42%, #000 40%, transparent 92%);
}
.hero__grid{
  position:absolute; inset:0; z-index:0; opacity:.5;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 40%, #000 20%, transparent 80%);
          mask-image:radial-gradient(120% 90% at 50% 40%, #000 20%, transparent 80%);
}
.hero__inner{ position:relative; z-index:2; max-width:1180px; margin:0 auto; width:100%; }

.hero__eyebrow{
  display:flex; flex-wrap:wrap; gap:14px; font-family:var(--mono);
  font-size:11.5px; letter-spacing:.1em; color:var(--ink-2); margin-bottom:26px;
}
.hero__eyebrow span{ color:var(--ink-2); }

.hero__title{
  font-size:clamp(96px, 30vw, 380px); font-weight:600; line-height:.8;
  letter-spacing:-.05em; display:flex; align-items:flex-end; margin-left:-.04em;
}
.hero__word, .hero__word .char{
  background:linear-gradient(180deg,#fff 26%, var(--ink-1) 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.hero__word .char{ display:inline-block; }
.hero__block{
  width:clamp(22px,5vw,64px); height:clamp(60px,17vw,190px);
  background:var(--sig); margin-left:clamp(10px,2vw,26px); margin-bottom:.1em;
  box-shadow:0 0 40px var(--sig-glow);
  animation:blink 1.1s steps(1) infinite;
}

.hero__role{ margin-top:30px; font-size:clamp(15px,2.4vw,22px); color:var(--ink-1);
             letter-spacing:.01em; font-weight:400; }
.hero__role .sep{ color:var(--sig); margin:0 8px; }

.hero__tagline{ margin-top:20px; display:flex; flex-direction:column; gap:4px; }
.hero__tagline .scramble{ font-size:clamp(16px,2.6vw,24px); color:var(--ink);
                          font-weight:500; letter-spacing:-.01em; }
.hero__tagline-en{ font-family:var(--mono); font-size:12.5px; color:var(--ink-2);
                   letter-spacing:.04em; }

.hero__meta{
  margin-top:clamp(38px,6vw,64px); display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr)); max-width:640px;
  border:1px solid var(--line); border-radius:var(--radius);
  background:rgba(16,19,25,.5); backdrop-filter:blur(4px);
}
.hero__meta-cell{ padding:16px 18px; display:flex; flex-direction:column; gap:7px;
                  border-right:1px solid var(--line); }
.hero__meta-cell:last-child{ border-right:0; }
.hero__meta-cell .k{ font-family:var(--mono); font-size:10px; letter-spacing:.14em;
                     color:var(--ink-3); text-transform:uppercase; }
.hero__meta-cell .v{ font-family:var(--mono); font-size:13px; color:var(--ink-1);
                     display:flex; align-items:center; gap:8px; }
.dot-live{ width:7px; height:7px; border-radius:50%; background:var(--sig);
           box-shadow:0 0 8px var(--sig-glow); animation:pulse 1.6s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.3; } }

.hero__scroll{
  position:absolute; bottom:30px; left:50%; transform:translateX(-50%);
  z-index:2; display:flex; flex-direction:column; align-items:center; gap:10px;
  font-family:var(--mono); font-size:10px; letter-spacing:.24em;
  text-transform:uppercase; color:var(--ink-2);
}
.hero__scroll-line{ width:1px; height:46px; background:linear-gradient(var(--sig),transparent);
                    position:relative; overflow:hidden; }
.hero__scroll-line::after{ content:""; position:absolute; top:0; left:0; width:100%;
  height:40%; background:var(--sig); animation:scrolldrop 1.8s var(--ease) infinite; }
@keyframes scrolldrop{ 0%{ transform:translateY(-100%); } 100%{ transform:translateY(300%); } }

@media (max-width:560px){
  .hero__meta{ grid-template-columns:1fr; }
  .hero__meta-cell{ border-right:0; border-bottom:1px solid var(--line); }
  .hero__meta-cell:last-child{ border-bottom:0; }
}

/* =========================================================
   WORK — bento
   ========================================================= */
.work{ padding:clamp(80px,12vw,140px) var(--gutter); max-width:1320px; margin:0 auto; }

.bento{
  display:grid; grid-template-columns:repeat(4, 1fr);
  grid-auto-rows:minmax(190px, auto); gap:14px;
}
.bento-card{
  position:relative; overflow:hidden; border:1px solid var(--line);
  border-radius:var(--radius); background:var(--bg-2);
  min-height:190px; isolation:isolate;
  transition:border-color .4s var(--ease), transform .5s var(--ease);
  --mx:50%; --my:50%;
}
.bento-card--xl{ grid-column:span 2; grid-row:span 2; }
.bento-card--tall{ grid-row:span 2; }
.bento-card--wide{ grid-column:span 2; }

.bento-card__canvas{ position:absolute; inset:0; width:100%; height:100%;
                     display:block; z-index:0; opacity:.92; }
.bento-card::before{ /* spotlight */
  content:""; position:absolute; inset:0; z-index:1; opacity:0;
  background:radial-gradient(340px circle at var(--mx) var(--my),
            rgba(79,209,224,.14), transparent 60%);
  transition:opacity .4s var(--ease); pointer-events:none;
}
.bento-card::after{ /* readability scrim at bottom */
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:linear-gradient(0deg, rgba(10,11,15,.92) 0%, rgba(10,11,15,.15) 40%, transparent 68%);
}
.bento-card:hover{ border-color:var(--line-2); }
.bento-card:hover::before{ opacity:1; }
.bento-card:hover .bento-card__canvas{ opacity:1; }

.bento-card__body{
  position:absolute; inset:0; z-index:2; padding:18px;
  display:flex; flex-direction:column; justify-content:flex-end;
}
.bento-card__idx{ position:absolute; top:16px; left:18px; font-family:var(--mono);
                  font-size:11px; letter-spacing:.1em; color:var(--sig); }
.bento-card__idx::before{ content:"["; color:var(--ink-3); }
.bento-card__idx::after{ content:"]"; color:var(--ink-3); }
.bento-card__meta{ margin-bottom:12px; }
.bento-card__title{ font-size:clamp(16px,2.2vw,24px); font-weight:500;
                    letter-spacing:-.01em; }
.bento-card--xl .bento-card__title{ font-size:clamp(24px,3.4vw,38px); }
.bento-card__jp{ font-family:var(--mono); font-size:11.5px; color:var(--ink-2);
                 margin-top:4px; letter-spacing:.02em; }
.bento-card__foot{ display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.tag{ font-family:var(--mono); font-size:10px; letter-spacing:.06em;
      color:var(--ink-1); border:1px solid var(--line-2); border-radius:100px;
      padding:3px 9px; }
.year{ font-family:var(--mono); font-size:10.5px; color:var(--ink-3);
       margin-left:auto; }

@media (max-width:860px){
  .bento{ grid-template-columns:repeat(2,1fr); }
  .bento-card--xl{ grid-column:span 2; grid-row:span 2; }
  .bento-card--wide{ grid-column:span 2; }
  .bento-card--tall{ grid-row:span 1; }
}
@media (max-width:520px){
  .bento{ grid-template-columns:1fr; }
  .bento-card--xl, .bento-card--wide{ grid-column:span 1; }
  .bento-card--xl{ grid-row:span 2; }
}

/* =========================================================
   APPROACH
   ========================================================= */
.approach{ position:relative; padding:clamp(90px,13vw,160px) var(--gutter);
           overflow:hidden; border-top:1px solid var(--line); }
.approach__canvas{ position:absolute; inset:0; width:100%; height:100%; z-index:0;
  opacity:.6;
  -webkit-mask-image:linear-gradient(180deg, transparent, #000 25%, #000 75%, transparent);
          mask-image:linear-gradient(180deg, transparent, #000 25%, #000 75%, transparent); }
.approach__inner{ position:relative; z-index:2; max-width:1180px; margin:0 auto; }

.principles{ list-style:none; margin-top:20px;
             border-top:1px solid var(--line); }
.principle{ display:grid; grid-template-columns:110px 1fr; gap:24px;
            padding:clamp(26px,4vw,44px) 0; border-bottom:1px solid var(--line);
            align-items:start; }
.principle__no{ font-family:var(--mono); font-size:13px; color:var(--sig);
                letter-spacing:.1em; padding-top:10px; }
/* number in col 1; title + both explanations stack in the content col 2 */
.principle__title,
.principle__body-en,
.principle__body{ grid-column:2; }
.principle__title{ font-size:clamp(24px,4vw,44px); font-weight:400;
                   letter-spacing:-.01em; margin-bottom:14px; }
.principle__title em{ font-family:var(--mono); font-size:.42em; color:var(--ink-2);
                      letter-spacing:.08em; margin-left:12px; vertical-align:middle; }
/* English statement leads; Japanese explanation reads directly below it. */
.principle__body-en{ max-width:60ch; color:var(--ink-2); font-family:var(--mono);
                     font-size:clamp(12.5px,1.35vw,14px); line-height:1.7; letter-spacing:.01em; }
.principle__body{ max-width:60ch; color:var(--ink-1); font-size:clamp(14px,1.6vw,17px);
                  line-height:1.75; margin-top:12px; padding-top:12px;
                  border-top:1px solid var(--line); }
@media (max-width:640px){
  .principle{ grid-template-columns:1fr; gap:14px; }
  .principle__no{ padding-top:0; }
  .principle__title,
  .principle__body-en,
  .principle__body{ grid-column:1; }
}

/* =========================================================
   LAB — capabilities + stats
   ========================================================= */
.lab{ padding:clamp(80px,12vw,150px) var(--gutter); max-width:1320px; margin:0 auto;
      border-top:1px solid var(--line); }
.lab__cols{ display:grid; grid-template-columns:1.1fr .9fr; gap:clamp(40px,6vw,90px);
            align-items:start; }

.caps{ list-style:none; border-top:1px solid var(--line); }
.cap{ display:flex; align-items:baseline; gap:18px; padding:20px 6px;
      border-bottom:1px solid var(--line); position:relative;
      transition:padding-left .35s var(--ease), color .35s var(--ease); }
.cap__no{ font-family:var(--mono); font-size:12px; color:var(--sig); width:24px; }
.cap__name{ font-size:clamp(18px,2.6vw,28px); font-weight:400; letter-spacing:-.01em; }
.cap__jp{ font-family:var(--mono); font-size:11.5px; color:var(--ink-3);
          margin-left:auto; }
.cap::after{ content:"→"; position:absolute; right:6px; opacity:0; color:var(--sig);
             transform:translateX(-8px); transition:opacity .3s, transform .3s; }
.cap:hover{ padding-left:20px; }
.cap:hover .cap__name{ color:var(--sig); }
.cap:hover .cap__jp{ opacity:0; }
.cap:hover::after{ opacity:1; transform:translateX(0); }

.stats{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px;
        background:var(--line); border:1px solid var(--line); border-radius:var(--radius);
        overflow:hidden; }
.stat{ background:var(--bg-2); padding:clamp(22px,3vw,34px); display:flex;
       flex-direction:column; gap:12px; }
.stat__num{ font-family:var(--mono); font-size:clamp(30px,5vw,52px); font-weight:500;
            color:var(--ink); letter-spacing:-.02em; font-variant-numeric:tabular-nums; }
.stat__num [data-count]::after{ content:attr(data-suffix); color:var(--sig);
                                font-size:.5em; margin-left:4px; }
.stat__label{ font-family:var(--mono); font-size:11px; color:var(--ink-2);
              letter-spacing:.03em; line-height:1.5; }
@media (max-width:820px){
  .lab__cols{ grid-template-columns:1fr; }
}

/* =========================================================
   CONTACT / FOOTER
   ========================================================= */
.contact{ position:relative; padding:clamp(100px,15vw,180px) var(--gutter) 0;
          overflow:hidden; border-top:1px solid var(--line);
          background:radial-gradient(120% 100% at 50% 0%, rgba(79,209,224,.06), transparent 55%); }
.meteors{ position:absolute; inset:0; overflow:hidden; z-index:0; pointer-events:none; }
.meteor{ position:absolute; top:0; width:2px; height:2px; border-radius:50%;
         background:var(--sig); box-shadow:0 0 8px 1px var(--sig-glow);
         transform:rotate(215deg); }
.meteor::before{ content:""; position:absolute; top:50%; left:0; width:60px; height:1px;
  transform:translateY(-50%);
  background:linear-gradient(90deg, var(--sig), transparent); }

.contact__inner{ position:relative; z-index:2; max-width:1000px; margin:0 auto;
                 text-align:center; }
.contact__inner .section-head__idx{ color:var(--sig); }
.contact__title{ font-size:clamp(38px,9vw,110px); font-weight:500; line-height:1.02;
                 letter-spacing:-.03em; margin:16px 0 22px; }
.contact__sub{ max-width:52ch; margin:0 auto; color:var(--ink-2);
               font-family:var(--mono); font-size:13px; line-height:1.8; }

.contact__mail{ display:inline-flex; align-items:center; gap:18px; margin-top:48px;
  font-size:clamp(22px,5vw,52px); font-weight:400; letter-spacing:-.02em;
  border-bottom:1px solid var(--line-2); padding-bottom:10px;
  transition:border-color .35s var(--ease); }
.contact__mail:hover{ border-color:var(--sig); }
.contact__mail:hover .contact__mail-txt{ color:var(--sig); }
.contact__mail-txt{ transition:color .35s var(--ease); }
.contact__mail-arrow{ color:var(--sig); transition:transform .35s var(--ease); }
.contact__mail:hover .contact__mail-arrow{ transform:translate(6px,-6px); }

.contact__links{ list-style:none; display:flex; flex-wrap:wrap; gap:8px 28px;
                 justify-content:center; margin-top:44px; }
.contact__links a{ font-family:var(--mono); font-size:13px; color:var(--ink-1);
                   letter-spacing:.02em; transition:color .25s; }
.contact__links a:hover{ color:var(--sig); }

.contact__base{ position:relative; z-index:2; margin-top:clamp(70px,10vw,120px);
  border-top:1px solid var(--line); padding:22px var(--gutter);
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-family:var(--mono); font-size:11px; color:var(--ink-3); letter-spacing:.06em; }
.contact__base-mid{ color:var(--ink-2); }
@media (max-width:640px){
  .contact__base{ justify-content:center; text-align:center; }
}

/* =========================================================
   reveal utility (JS-driven; safe fallback = visible)
   ========================================================= */
.reveal{ opacity:1; }
.js .reveal{ opacity:0; transform:translateY(22px); }
.js .reveal.is-in{ opacity:1; transform:none;
  transition:opacity .8s var(--ease), transform .8s var(--ease); }

/* =========================================================
   reduced motion
   ========================================================= */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration:.001ms !important; animation-iteration-count:1 !important;
    transition-duration:.001ms !important; scroll-behavior:auto !important;
  }
  .nav__caret, .hero__block, .dot-live, .hero__scroll-line::after{ animation:none; }
  .hero__block{ opacity:1; }
  .js .reveal{ opacity:1; transform:none; }
  .cursor{ display:none !important; }
  body.has-cursor{ cursor:auto; }
}

/* ---- back to showcase index (HUD) ---- */
.backlink{ position:fixed; left:16px; bottom:44px; z-index:120;
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase;
  padding:8px 12px; background:rgba(10,11,15,.72); color:var(--ink);
  border:1px solid var(--line-2); -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
  text-decoration:none; transition:border-color .16s,color .16s,transform .16s; }
.backlink__i{ color:var(--sig); }
.backlink__e{ color:var(--ink-2); }
.backlink:hover{ border-color:var(--sig); color:#fff; transform:translateY(-2px); }
.backlink:hover .backlink__e{ color:var(--sig); }
.backlink:focus-visible{ outline:1px solid var(--sig); outline-offset:2px; }
@media (max-width:640px){ .backlink{ bottom:12px; left:12px; } .backlink__e{ display:none; } }
@media (prefers-reduced-motion:reduce){ .backlink{ transition:none; } }

/* ---- JP/EN language switch (sits just above the back-to-index button) ---- */
.lang-switch{ position:fixed; left:20px; bottom:62px; z-index:71;
  display:inline-flex; align-items:center; gap:6px;
  font-family:var(--font-mono, var(--mono, "IBM Plex Mono")), monospace; font-size:11px; letter-spacing:.08em;
  padding:6px 11px; background:rgba(0,0,0,.04); border:1px solid currentColor; }
.lang-switch .ls{ color:inherit; text-decoration:none; opacity:.55; }
.lang-switch a.ls:hover{ opacity:1; text-decoration:underline; }
.lang-switch .ls.is-on{ opacity:1; font-weight:700; }
.lang-switch .ls-sep{ opacity:.4; }
@media (max-width:640px){ .lang-switch{ bottom:54px; left:12px; padding:5px 9px; } }
.lang-switch{ bottom:86px; left:16px; background:rgba(10,11,15,.72); border-color:var(--line-2); color:var(--ink); }
.lang-switch .ls{ color:var(--ink); }
@media (max-width:640px){ .lang-switch{ bottom:54px; } }