/* NeuroStrum — 2026
   Dark, metal, restrained. */
:root{
  --bg:#070708;
  --bg-2:#0c0d0f;
  --panel:#101114;
  --ink:#f2f3f5;
  --ink-2:#c9ccd2;
  --muted:#8b9099;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --accent:#dfe7f2;
  --glow:rgba(150,190,255,.20);
  --wrap:1240px;
  --pad:clamp(20px,4vw,40px);
  --font:"Inter","SF Pro Display",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
[id]{scroll-margin-top:92px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:clip;max-width:100%;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.02em;line-height:1.12}
p{margin:0}
.en{color:var(--muted);font-size:.92em;letter-spacing:.01em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
::selection{background:rgba(160,200,255,.28);color:#fff}

/* grain overlay */
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.5;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.28'/%3E%3C/svg%3E");
}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s}
.nav::after{content:"";position:absolute;inset:0;border-bottom:1px solid transparent;transition:border-color .4s;pointer-events:none}
.nav--solid{background:rgba(7,7,8,.72);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%)}
.nav--solid::after{border-bottom-color:var(--line)}
.nav__inner{position:relative;z-index:1;max-width:var(--wrap);margin:0 auto;padding:18px var(--pad);display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:baseline;gap:12px;margin-right:auto}
.brand__mark{font-size:19px;font-weight:600;letter-spacing:-.01em}
.brand__sub{font-size:11px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.nav__links{display:flex;gap:26px;font-size:14px;color:var(--ink-2)}
.nav__links a{position:relative;padding:6px 0;transition:color .25s}
.nav__links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--accent);transition:width .3s var(--ease)}
.nav__links a:hover{color:#fff}
.nav__links a:hover::after{width:100%}
.lang-switch{
  font-family:inherit;font-size:11.5px;letter-spacing:.14em;line-height:1;padding:9px 14px;
  background:none;color:var(--ink-2);border:1px solid var(--line-2);border-radius:999px;cursor:pointer;
  transition:color .3s,border-color .3s,background .3s;white-space:nowrap;
}
.lang-switch:hover{color:#fff;border-color:rgba(255,255,255,.34);background:rgba(255,255,255,.05)}
.lang-switch:focus-visible{outline:1px solid rgba(255,255,255,.5);outline-offset:2px}
.nav__cta{font-size:13px;padding:9px 16px;border:1px solid var(--line-2);border-radius:999px;color:var(--ink);transition:background .3s,border-color .3s}
.nav__cta:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.3)}
.nav__toggle{display:none;width:40px;height:40px;border:0;background:none;cursor:pointer;padding:10px}
.nav__toggle span{display:block;height:1px;background:var(--ink);margin:5px 0;transition:transform .3s var(--ease),opacity .3s}
.nav--open .nav__toggle span:first-child{transform:translateY(3px) rotate(45deg)}
.nav--open .nav__toggle span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:140px 0 24px;overflow:hidden}
.hero__glow{
  position:absolute;left:50%;top:-10%;width:min(1200px,120vw);height:900px;transform:translateX(-50%);
  background:radial-gradient(ellipse at 50% 40%,rgba(150,190,255,.13),rgba(120,160,255,.05) 40%,transparent 68%);
  filter:blur(20px);pointer-events:none;
}
.hero__inner{position:relative;max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
.eyebrow{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:14px;flex-wrap:wrap;row-gap:6px}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--line-2)}
.eyebrow__en{letter-spacing:.18em;color:rgba(139,144,153,.65)}
.hero__title{
  margin:26px 0 0;font-size:clamp(52px,8.4vw,104px);font-weight:600;line-height:1.02;letter-spacing:-.035em;
  background:linear-gradient(180deg,#fff 15%,#b9c0cb 100%);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__en{margin-top:18px;font-size:clamp(20px,2.6vw,30px);color:var(--ink-2);letter-spacing:-.01em}
.hero__lede{margin-top:22px;max-width:44ch;color:var(--muted);font-size:15.5px;line-height:1.85}
.hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:36px}
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border-radius:999px;font-size:14px;
  letter-spacing:.01em;transition:transform .3s var(--ease),background .3s,border-color .3s,color .3s;
}
.btn--primary{background:#f2f3f5;color:#08080a;font-weight:500}
.btn--primary:hover{transform:translateY(-2px);background:#fff}
.btn--ghost{border:1px solid var(--line-2);color:var(--ink)}
.btn--ghost:hover{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.3);transform:translateY(-2px)}
.btn__meta{font-size:11px;letter-spacing:.12em;opacity:.55;text-transform:uppercase}
.hero__media{position:relative;margin:clamp(26px,3.4vw,44px) 0 0;padding:0}
.hero__media img{
  width:100%;filter:drop-shadow(0 40px 80px rgba(0,0,0,.8));
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 10%);
  mask-image:linear-gradient(180deg,transparent 0,#000 10%);
}
.hero__media::after{
  pointer-events:none;
  content:"";position:absolute;left:6%;right:6%;bottom:-2%;height:120px;
  background:radial-gradient(ellipse at 50% 0%,rgba(150,190,255,.10),transparent 70%);filter:blur(30px);
}
.hero__meta{
  max-width:var(--wrap);margin:26px auto 0;padding:0 var(--pad);display:flex;justify-content:space-between;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:rgba(139,144,153,.55);
}

/* ---------- manifesto ---------- */
.manifesto{padding:clamp(64px,9vw,120px) 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:linear-gradient(180deg,transparent,rgba(255,255,255,.014),transparent)}
.manifesto__line{font-size:clamp(30px,4.6vw,58px);font-weight:500;line-height:1.24;letter-spacing:-.028em;max-width:20ch}
.manifesto__en{margin-top:20px;color:var(--muted);font-size:clamp(14px,1.5vw,17px);letter-spacing:.01em}

/* ---------- sections ---------- */
.section{padding:clamp(80px,11vw,140px) 0}
.section__head{max-width:840px}
.section__head h2{margin-top:22px;font-size:clamp(34px,5vw,60px);line-height:1.1}
.section__lede{margin-top:24px;color:var(--muted);font-size:15.5px;line-height:1.9;max-width:60ch}

/* colorway switcher */
.colorway{display:flex;align-items:center;gap:10px;margin-top:24px;flex-wrap:wrap}
.colorway__label{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.colorway__opt{
  display:inline-flex;align-items:center;gap:9px;padding:8px 15px;border-radius:999px;
  border:1px solid var(--line-2);background:none;color:var(--ink-2);
  font-family:inherit;font-size:13px;line-height:1;cursor:pointer;
  transition:border-color .3s,color .3s,background .3s;
}
.colorway__opt:hover{color:#fff;border-color:rgba(255,255,255,.34)}
.colorway__opt.is-active{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.07)}
.colorway__dot{width:14px;height:14px;border-radius:50%;flex:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}
.colorway__dot--black{background:#141619}
.colorway__dot--white{background:#ecedee}

/* white colorway framing */
html[data-color="white"] .bento__item{background:#e9eaec}
html[data-color="white"] .bento__item figcaption{background:linear-gradient(0deg,rgba(6,6,7,.94),rgba(6,6,7,.6) 60%,transparent)}
html[data-color="white"] .hero__media img{
  filter:drop-shadow(0 40px 80px rgba(0,0,0,.55));
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 9%,#000 88%,transparent 100%);
  mask-image:linear-gradient(180deg,transparent 0,#000 9%,#000 88%,transparent 100%);
}

/* selectable color cards */
.colors__card[data-pick]{cursor:pointer;position:relative}
.colors__card.is-selected{border-color:rgba(255,255,255,.55);box-shadow:0 0 0 1px rgba(255,255,255,.25) inset}
.colors__card.is-selected::after{
  content:"✓";position:absolute;top:14px;right:16px;width:24px;height:24px;border-radius:50%;
  background:rgba(10,10,12,.7);border:1px solid rgba(255,255,255,.45);color:#fff;
  font-size:12px;display:grid;place-items:center;backdrop-filter:blur(6px);
}
.colors__card--light.is-selected{border-color:rgba(255,255,255,.7)}

/* bento */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(12px,1.6vw,20px);margin-top:clamp(44px,6vw,72px)}
.bento__item{
  position:relative;margin:0;background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:border-color .4s,transform .5s var(--ease);
}
.bento__item:hover{border-color:rgba(255,255,255,.2);transform:translateY(-3px)}
.bento__item--wide{grid-column:span 8}
.bento__item--tall{grid-column:span 4}
.bento__item:nth-child(3),.bento__item:nth-child(4){grid-column:span 6}
.bento__item--full{grid-column:span 12}
.bento__item--full img{aspect-ratio:21/9}
.bento__item img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;transition:transform .8s var(--ease)}
.bento__item--wide img{aspect-ratio:16/8}
.bento__item:hover img{transform:scale(1.03)}
.bento__item figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:22px 24px;
  background:linear-gradient(0deg,rgba(6,6,7,.92),rgba(6,6,7,.55) 60%,transparent);
  display:flex;flex-direction:column;gap:2px;
}
.bento__item figcaption strong{font-size:16px;font-weight:600;letter-spacing:-.01em}
.bento__item figcaption .en{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:rgba(139,144,153,.9)}
.bento__item figcaption em{font-style:normal;color:var(--muted);font-size:13.5px;margin-top:8px}

/* features */
.section--features{background:linear-gradient(180deg,transparent,rgba(255,255,255,.018) 40%,transparent)}
.features{list-style:none;margin:clamp(44px,6vw,72px) 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 clamp(32px,6vw,80px)}
.feature{display:flex;gap:22px;padding:34px 0;border-top:1px solid var(--line)}
.feature__num{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:rgba(139,144,153,.75);padding-top:6px;transition:color .3s}
.feature:hover .feature__num{color:var(--accent)}
.feature h3{font-size:clamp(19px,2vw,23px);letter-spacing:-.015em}
.feature .en{margin-top:6px;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase}
.feature p:last-child{margin-top:12px;color:var(--muted);font-size:14.5px;line-height:1.8}

/* colours */
.section--colors .colors{list-style:none;margin:clamp(44px,6vw,72px) 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,2.2vw,28px)}
.colors__card{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--panel);transition:border-color .4s,transform .5s var(--ease)}
.colors__card:hover{border-color:rgba(255,255,255,.22);transform:translateY(-3px)}
.colors__card figure{margin:0;background:#0d0e10}
.colors__card--light figure{background:#e6e7e9}
.colors__card img{width:100%;height:auto;display:block}
.colors__meta{padding:22px 24px 26px;border-top:1px solid var(--line)}
.colors__meta h3{margin:0;font-size:18px;font-weight:600;letter-spacing:-.01em}
.colors__meta .en{margin-top:4px;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase}
.colors__meta p:last-child{margin-top:12px;font-size:14px;color:var(--muted);line-height:1.75}
.colors__note{margin-top:24px;font-size:13px;color:rgba(139,144,153,.8)}

/* lighting */
.section--light{background:linear-gradient(180deg,transparent,rgba(150,190,255,.035) 45%,transparent)}
.light-grid{list-style:none;margin:clamp(44px,6vw,72px) 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,1.6vw,18px)}
.light-grid li{
  position:relative;padding:28px 24px 26px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.012);
  transition:border-color .4s,transform .5s var(--ease),background .4s;overflow:hidden;
}
.light-grid li::after{
  content:"";position:absolute;inset:auto -30% -60% -30%;height:70%;pointer-events:none;
  background:radial-gradient(ellipse at 50% 0%,rgba(150,190,255,.16),transparent 70%);opacity:0;transition:opacity .5s;
}
.light-grid li:hover{border-color:rgba(255,255,255,.22);transform:translateY(-3px);background:rgba(255,255,255,.025)}
.light-grid li:hover::after{opacity:1}
.light-grid strong{
  display:block;font-size:clamp(38px,4.6vw,54px);font-weight:600;line-height:1;letter-spacing:-.04em;
  background:linear-gradient(180deg,#fff,#9fb6d4);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.light-grid strong span{font-size:.55em;vertical-align:super;letter-spacing:0}
.light-grid h3{margin-top:14px;font-size:15.5px;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.light-grid p{margin-top:10px;font-size:13.5px;line-height:1.78;color:var(--muted)}
.light-media{margin:clamp(36px,5vw,56px) 0 0;position:relative;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.light-media img{width:100%;height:auto;display:block;aspect-ratio:16/9;object-fit:cover}
.light-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:20px 24px;
  background:linear-gradient(0deg,rgba(6,6,7,.92),rgba(6,6,7,.4) 65%,transparent);
  font-size:13px;color:var(--ink-2);display:flex;flex-direction:column;gap:2px;
}
.light-media figcaption .en{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:rgba(139,144,153,.9)}
.light-note{margin-top:clamp(30px,4vw,44px);padding-top:26px;border-top:1px solid var(--line);max-width:840px}
.light-note p{font-size:14px;line-height:1.85;color:var(--ink-2)}
.light-note strong{color:#fff;font-weight:600;margin-right:10px;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.light-note .en{margin-top:10px;font-size:12.5px}

/* speaker */
.speaker{position:relative;padding:clamp(90px,13vw,170px) 0;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.speaker__inner{position:relative;display:flex;justify-content:center;text-align:center}
.speaker__copy{position:relative;z-index:2;max-width:720px}
.speaker__copy h2{margin-top:24px;font-size:clamp(34px,5.2vw,62px)}
.speaker__copy .en{margin-top:16px;font-size:clamp(14px,1.6vw,17px)}
.speaker__copy p:last-child{margin-top:26px;color:var(--muted);font-size:15.5px;line-height:1.9}
.speaker__rings{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.speaker__rings span{
  position:absolute;border:1px solid rgba(255,255,255,.06);border-radius:50%;
  width:min(560px,80vw);aspect-ratio:1;animation:pulse 7s ease-in-out infinite;
}
.speaker__rings span:nth-child(2){width:min(820px,105vw);animation-delay:1.4s}
.speaker__rings span:nth-child(3){width:min(1100px,135vw);animation-delay:2.8s}
@keyframes pulse{0%,100%{opacity:.35;transform:scale(1)}50%{opacity:.9;transform:scale(1.03)}}

/* specs */
/* stat strip */
.stats{list-style:none;margin:clamp(40px,5vw,64px) 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.stats li{background:var(--bg);padding:26px 24px;display:flex;flex-direction:column;gap:2px}
.stats strong{font-size:clamp(30px,4vw,46px);font-weight:600;letter-spacing:-.035em;line-height:1.05;
  background:linear-gradient(180deg,#fff,#b9c0cb);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{font-size:13px;color:var(--ink-2);margin-top:8px;line-height:1.5}
.stats em{font-style:normal;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:rgba(139,144,153,.6);margin-top:4px}

/* spec groups */
.specs{margin:clamp(34px,4.4vw,56px) 0 0;display:grid;grid-template-columns:1fr 1fr;
  gap:clamp(30px,3.8vw,52px) clamp(32px,6vw,80px)}
.specs__cat{margin:0 0 6px;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);
  font-weight:500;display:flex;align-items:baseline;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line-2)}
.specs__cat span{font-size:9.5px;letter-spacing:.2em;color:rgba(139,144,153,.45)}
.specs dl{margin:0}
.spec-row{display:flex;gap:18px;padding:12px 0;border-bottom:1px solid var(--line);align-items:baseline}
.spec-row:last-child{border-bottom:0}
.spec-row dt{width:78px;flex:none;font-size:11.5px;letter-spacing:.1em;color:var(--muted)}
.spec-row dd{margin:0;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.tbd{color:rgba(139,144,153,.5);font-size:12px;border:1px dashed rgba(255,255,255,.16);border-radius:999px;padding:1px 8px;white-space:nowrap}
.specs__note{margin-top:32px;font-size:12.5px;color:rgba(139,144,153,.75);display:flex;gap:12px;flex-wrap:wrap}

/* handbook */
.handbook{padding:clamp(80px,11vw,140px) 0;background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.handbook__inner{display:grid;grid-template-columns:minmax(0,.85fr) 1fr;gap:clamp(36px,7vw,90px);align-items:center}
.handbook__cover{margin:0;position:relative}
.handbook__cover img{border-radius:6px;box-shadow:0 40px 90px rgba(0,0,0,.7),0 0 0 1px rgba(255,255,255,.06);transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);transition:transform .8s var(--ease)}
.handbook__cover:hover img{transform:perspective(1200px) rotateY(0) rotateX(0)}
.handbook__cover::after{content:"";position:absolute;inset:auto 0 -6% 0;height:40%;background:radial-gradient(ellipse at 50% 0%,rgba(150,190,255,.10),transparent 70%);filter:blur(24px);z-index:-1}
.handbook__copy h2{margin-top:22px;font-size:clamp(30px,4vw,46px);line-height:1.12}
.handbook__copy p:last-of-type{margin-top:22px;color:var(--muted);font-size:15px;line-height:1.85;max-width:46ch}
.handbook__copy .btn{margin-top:32px}

/* contact */
.contact{padding:clamp(80px,11vw,150px) 0;border-top:1px solid var(--line)}
.contact__inner h2{font-size:clamp(30px,4.4vw,52px);line-height:1.2;letter-spacing:-.025em}
.contact__links{display:flex;gap:40px;flex-wrap:wrap;margin-top:36px}
.contact__links a{display:flex;flex-direction:column;gap:2px;font-size:clamp(16px,1.8vw,20px);border-bottom:1px solid var(--line-2);padding-bottom:10px;transition:border-color .3s,color .3s}
.contact__links a:hover{border-color:var(--accent);color:#fff}
.contact__links .en{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase}
.contact__addr{margin-top:40px;color:var(--muted);font-size:13.5px;display:flex;gap:10px;align-items:baseline}
.contact__addr .en{font-size:12px}

/* footer */
.footer{border-top:1px solid var(--line);padding:44px 0}
.footer__inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-end}
.footer__brand .brand__mark{font-size:17px}
.footer__brand p{margin-top:10px;font-size:12px;line-height:1.8}
.footer__entity{margin-top:6px;font-size:11.5px;color:rgba(139,144,153,.62);letter-spacing:.01em}
.footer__badge{
  display:inline-flex;align-items:center;gap:9px;margin-top:16px;padding:9px 18px;
  border:1px solid rgba(255,255,255,.22);border-radius:999px;
  font-size:13px;letter-spacing:.02em;color:var(--ink);background:rgba(255,255,255,.045);
}
.footer__badge-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(200,220,255,.8);flex:none}
.contact__group{
  margin-top:24px;display:inline-flex;align-items:center;gap:10px;
  font-size:14px;letter-spacing:.02em;color:var(--ink);
  padding:11px 20px;border:1px solid rgba(255,255,255,.24);border-radius:999px;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  box-shadow:0 0 24px rgba(150,190,255,.06);
}
.contact__group::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(200,220,255,.8);flex:none}
.footer__legal{font-size:12px;color:rgba(139,144,153,.8);text-align:right}
.footer__legal a{transition:color .3s}
.footer__legal a:hover{color:#fff}

/* ---------- english mode ---------- */
html[lang="en"] .en,
html[lang="en"] .hero__en,
html[lang="en"] .manifesto__en,
html[lang="en"] .eyebrow__en,
html[lang="en"] .stats em,
html[lang="en"] .specs__cat span,
html[lang="en"] .brand__sub{display:none}
html[lang="en"] .footer__brand .en{display:block}
html[lang="en"] .hero__title{font-size:clamp(36px,5.2vw,74px);letter-spacing:-.03em;max-width:18ch;line-height:1.06}
html[lang="en"] .manifesto__line{max-width:24ch}
html[lang="en"] .section__head h2{max-width:24ch}
html[lang="en"] .speaker__copy h2{max-width:26ch}
html[lang="en"] .contact__inner h2{max-width:22ch}
html[lang="en"] .nav__links{gap:22px;font-size:13.5px}
html[lang="en"] .feature h3{font-size:clamp(17px,1.8vw,21px)}
html[lang="en"] .spec-row dt{width:100px}
html[lang="en"] .light-grid h3{font-size:14.5px}
html[lang="en"] .handbook__copy h2{max-width:18ch}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .nav__links{display:none}
  .nav__cta{display:none}
  .nav__toggle{display:block}
  .nav--open .nav__links{
    display:flex;flex-direction:column;position:fixed;inset:0;padding:110px var(--pad) 40px;
    background:rgba(7,7,8,.97);backdrop-filter:blur(20px);font-size:22px;gap:8px;
  }
  .nav--open .nav__links a{padding:14px 0;border-bottom:1px solid var(--line)}
  .bento__item--wide,.bento__item--tall,.bento__item:nth-child(3),.bento__item:nth-child(4){grid-column:span 12}
  .bento__item--full img{aspect-ratio:4/3}
  .bento__item img,.bento__item--wide img{aspect-ratio:4/3}
  .features{grid-template-columns:1fr}
  .light-grid{grid-template-columns:1fr 1fr}
  .colors{grid-template-columns:1fr}
  .specs{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .handbook__inner{grid-template-columns:1fr}
  .handbook__cover{max-width:320px;margin:0 auto}
  .footer__inner{flex-direction:column;align-items:flex-start}
  .footer__legal{text-align:left}
  .hero{padding-top:120px}
}
@media (max-width:560px){
  .brand__sub{display:none}
  .lang-switch{padding:8px 11px;font-size:11px}
  .hero__actions .btn{flex:1 1 auto;justify-content:center}
  .contact__links{gap:24px}
  .eyebrow{font-size:10.5px;letter-spacing:.16em;gap:10px}
  .eyebrow__en{display:none}
  .hero{padding-top:104px}
  .hero__title{font-size:clamp(42px,12.5vw,64px)}
  .hero__meta{font-size:9.5px;letter-spacing:.16em}
  .feature{gap:14px;padding:26px 0}
  .spec-row{gap:12px;padding:11px 0}
  .spec-row dt{width:60px;font-size:10.5px}
  .spec-row dd{font-size:13.5px}
  .stats li{padding:20px 16px}
  .light-grid{grid-template-columns:1fr}
  .light-grid li{padding:24px 20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .speaker__rings span{animation:none}
  .bento__item img,.handbook__cover img{transition:none}
}

/* ---------- light theme ---------- */
html[data-theme="light"]{
  --bg:#f4f5f6;
  --bg-2:#eceef0;
  --panel:#ffffff;
  --ink:#0c0d0f;
  --ink-2:#3a3e44;
  --muted:#6a6f77;
  --line:rgba(0,0,0,.10);
  --line-2:rgba(0,0,0,.18);
  --accent:#14161a;
  --glow:rgba(70,110,170,.12);
}
html[data-theme="light"] .grain{opacity:.18;mix-blend-mode:multiply}
html[data-theme="light"] .nav--solid{background:rgba(244,245,246,.82)}
html[data-theme="light"] .nav--solid::after{border-bottom-color:var(--line)}
html[data-theme="light"] .nav__links{color:var(--ink-2)}
html[data-theme="light"] .nav__links a:hover{color:#000}
html[data-theme="light"] .nav__cta{border-color:var(--line-2)}
html[data-theme="light"] .nav__cta:hover{background:rgba(0,0,0,.05);border-color:rgba(0,0,0,.3)}
html[data-theme="light"] .lang-switch{border-color:var(--line-2);color:var(--ink-2)}
html[data-theme="light"] .lang-switch:hover{color:#000;border-color:rgba(0,0,0,.34);background:rgba(0,0,0,.04)}
html[data-theme="light"] .brand__sub{color:var(--muted)}
html[data-theme="light"] .hero__glow{
  background:radial-gradient(ellipse at 50% 40%,rgba(90,130,190,.18),rgba(120,160,220,.07) 45%,transparent 70%);
}
html[data-theme="light"] .hero__title{
  background:linear-gradient(180deg,#101114 12%,#4c5158 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
html[data-theme="light"] .hero__en{color:var(--ink-2)}
html[data-theme="light"] .hero__lede{color:var(--muted)}
html[data-theme="light"] .hero__meta{color:rgba(90,95,102,.6)}
html[data-theme="light"] .hero__media img{filter:drop-shadow(0 30px 60px rgba(0,0,0,.18))}
html[data-theme="light"] .btn--primary{background:#111214;color:#fff}
html[data-theme="light"] .btn--primary:hover{background:#000}
html[data-theme="light"] .btn--ghost{border-color:var(--line-2);color:var(--ink)}
html[data-theme="light"] .btn--ghost:hover{background:rgba(0,0,0,.05);border-color:rgba(0,0,0,.3)}
html[data-theme="light"] .manifesto{background:linear-gradient(180deg,transparent,rgba(0,0,0,.02),transparent)}
html[data-theme="light"] .bento__item{background:#fff;border-color:var(--line)}
html[data-theme="light"] .bento__item:hover{border-color:rgba(0,0,0,.22)}
html[data-theme="light"] .feature__num{color:rgba(90,95,102,.7)}
html[data-theme="light"] .speaker__rings span{border-color:rgba(0,0,0,.08)}
html[data-theme="light"] .stats{background:var(--line);border-color:var(--line)}
html[data-theme="light"] .stats li{background:var(--bg)}
html[data-theme="light"] .stats strong{background:linear-gradient(180deg,#111,#4a4f57);-webkit-background-clip:text;background-clip:text;color:transparent}
html[data-theme="light"] .stats em{color:rgba(90,95,102,.6)}
html[data-theme="light"] .tbd{border-color:rgba(0,0,0,.18);color:rgba(90,95,102,.9)}
html[data-theme="light"] .specs__note{color:rgba(90,95,102,.8)}
html[data-theme="light"] .spec-row dd{color:var(--ink-2)}
html[data-theme="light"] .section--light{background:linear-gradient(180deg,transparent,rgba(80,120,180,.07) 45%,transparent)}
html[data-theme="light"] .light-grid li{background:rgba(0,0,0,.014);border-color:var(--line)}
html[data-theme="light"] .light-grid li:hover{background:rgba(0,0,0,.032);border-color:rgba(0,0,0,.2)}
html[data-theme="light"] .light-grid strong{background:linear-gradient(180deg,#111,#3f444b);-webkit-background-clip:text;background-clip:text;color:transparent}
html[data-theme="light"] .light-media{border-color:var(--line)}
html[data-theme="light"] .light-media figcaption{
  background:linear-gradient(0deg,rgba(255,255,255,.96),rgba(255,255,255,.55) 65%,transparent);
  color:var(--ink);
}
html[data-theme="light"] .light-media figcaption .en{color:var(--muted)}
html[data-theme="light"] .colors__card{background:#fff;border-color:var(--line)}
html[data-theme="light"] .colors__meta{border-top-color:var(--line)}
html[data-theme="light"] .colors__card.is-selected{border-color:rgba(0,0,0,.45)}
html[data-theme="light"] .colors__card.is-selected::after{
  background:rgba(255,255,255,.9);border-color:rgba(0,0,0,.3);color:#111;
}
html[data-theme="light"] .handbook{background:linear-gradient(180deg,rgba(0,0,0,.025),transparent)}
html[data-theme="light"] .handbook__cover img{box-shadow:0 26px 60px rgba(0,0,0,.18),0 0 0 1px rgba(0,0,0,.06)}
html[data-theme="light"] .contact__links a{border-bottom-color:var(--line-2)}
html[data-theme="light"] .contact__links a:hover{color:#000;border-color:#000}
html[data-theme="light"] .contact__group{
  border-color:rgba(0,0,0,.16);
  background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.02));
  box-shadow:none;color:var(--ink);
}
html[data-theme="light"] .footer__badge{border-color:rgba(0,0,0,.16);background:rgba(0,0,0,.03);color:var(--ink)}
html[data-theme="light"] .footer__legal{color:var(--muted)}
html[data-theme="light"] .footer__entity{color:rgba(90,95,102,.75)}
html[data-theme="light"] .footer__legal a:hover{color:#000}
html[data-theme="light"] .colorway__opt{border-color:var(--line-2);color:var(--ink-2)}
html[data-theme="light"] .colorway__opt:hover{border-color:rgba(0,0,0,.35);color:#000}
html[data-theme="light"] .colorway__opt.is-active{border-color:rgba(0,0,0,.55);background:rgba(0,0,0,.06);color:#000}
html[data-theme="light"] .colorway__dot{box-shadow:inset 0 0 0 1px rgba(0,0,0,.2)}
html[data-theme="light"] .colorway__dot--white{background:#fff}
@media (max-width:900px){
  html[data-theme="light"] .nav--open .nav__links{background:rgba(244,245,246,.98)}
}
/* light + white colorway: captions & hero edges */
html[data-theme="light"][data-color="white"] .bento__item figcaption{
  background:linear-gradient(0deg,rgba(246,247,248,.97),rgba(246,247,248,.7) 55%,transparent);
  color:var(--ink);
}
html[data-theme="light"][data-color="white"] .bento__item figcaption .en{color:rgba(90,95,102,.85)}
html[data-theme="light"][data-color="white"] .bento__item figcaption em{color:var(--muted)}
html[data-theme="light"][data-color="white"] .light-media figcaption{
  background:linear-gradient(0deg,rgba(246,247,248,.97),rgba(246,247,248,.6) 65%,transparent);
  color:var(--ink);
}
html[data-theme="light"][data-color="white"] .light-media figcaption .en{color:var(--muted)}
html[data-theme="light"][data-color="white"] .hero__media img{
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 8%,#000 86%,transparent 100%);
  mask-image:linear-gradient(180deg,transparent 0,#000 8%,#000 86%,transparent 100%);
}