/* ==========================================================================
   Luzcell — shared stylesheet.  Spec: 10_Marketing/Brand/DESIGN.md (v3 White)
   Ground is white everywhere. Structure = space + hairlines. No bands, no cards.
   ========================================================================== */
:root{
  --white:   #ffffff;
  --ink:     oklch(21% 0.006 260);
  --ink-2:   oklch(46% 0.008 260);
  --ink-3:   oklch(54.5% 0.008 260);   /* labels, 4.96:1 on white */
  --ink-soft:oklch(62% 0.008 260);     /* display-size type ONLY, 3.64:1 */
  --hair:    oklch(90.5% 0.004 260);   /* decorative dividers */
  --hair-str:oklch(66% 0.010 260);     /* control boundaries, 3.11:1 */
  --hair-2:  oklch(97% 0.003 260);     /* control hover ground */
  --navy:    oklch(38.4% 0.146 260.3);
  --green:   oklch(52% 0.150 150.7);

  --d1: clamp(2.9rem, 1.05rem + 7.4vw, 7.1rem);
  --d2: clamp(2.05rem, 1.25rem + 3.3vw, 4.0rem);
  --d3: clamp(1.45rem, 1.18rem + 1.15vw, 2.1rem);
  --t1: clamp(1.12rem, 1.02rem + .42vw, 1.42rem);
  --t0: clamp(1.02rem, .98rem + .18vw, 1.1rem);
  --ts: clamp(.8rem, .77rem + .12vw, .86rem);

  --pad: clamp(1.25rem, .55rem + 3vw, 3rem);
  --band: clamp(4.5rem, 2rem + 9vw, 10.5rem);
  --ease: cubic-bezier(.22,1,.36,1);
  --navh: 52px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--white);color:var(--ink);
  font-family:"Schibsted Grotesk","Noto Sans JP",system-ui,-apple-system,sans-serif;
  font-size:var(--t0);line-height:1.55;letter-spacing:-.006em;-webkit-font-smoothing:antialiased;
}
html[lang="ja"] body{font-family:"Noto Sans JP","Schibsted Grotesk",system-ui,sans-serif;line-height:1.85;letter-spacing:0}
img,svg{max-width:100%;height:auto;display:block}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.032em;line-height:1.04;text-wrap:balance;color:var(--ink)}
html[lang="ja"] h1,html[lang="ja"] h2,html[lang="ja"] h3{letter-spacing:-.01em;line-height:1.34}
p{margin:0 0 1em;text-wrap:pretty}
p:last-child{margin-bottom:0}
a{color:var(--navy)}
:focus-visible{outline:2px solid var(--navy);outline-offset:4px;border-radius:3px}
.wrap{width:min(100% - var(--pad)*2, 1080px);margin-inline:auto}
.wide{width:min(100% - var(--pad)*2, 1340px);margin-inline:auto}
.skip{position:absolute;left:-9999px;background:var(--ink);color:var(--white);padding:.8rem 1.2rem;z-index:99}
.skip:focus{left:.5rem;top:.5rem}

/* -------- global nav: product families, never page sections -------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);border-bottom:1px solid var(--hair)}
@supports (backdrop-filter:saturate(180%) blur(14px)){.nav{backdrop-filter:saturate(180%) blur(14px)}}
.nav-in{display:flex;align-items:center;flex-wrap:wrap;gap:.2rem clamp(.7rem,2vw,1.6rem);min-height:var(--navh);padding-block:.35rem}
.nav-brand{display:flex;align-items:center;flex:0 0 auto}
.nav-brand img{width:clamp(88px,10vw,108px)}
.nav-links{display:flex;flex-wrap:wrap;gap:.1rem clamp(.85rem,2.2vw,2rem);margin-left:auto;align-items:center;min-width:0}
@media (max-width:360px){.nav-in{gap:.2rem .55rem}.nav-brand img{width:82px}.nav-links{gap:.1rem .7rem}}
.nav-links a{
  color:var(--ink-2);text-decoration:none;font-size:var(--ts);font-weight:500;
  white-space:nowrap;padding-block:.62rem;transition:color .2s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a[aria-current]{color:var(--ink);font-weight:600}
.lang{display:flex;gap:2px;align-items:center;flex:0 0 auto}
.lang button{
  font:inherit;font-size:var(--ts);font-weight:500;background:none;border:0;cursor:pointer;
  color:var(--ink-3);padding:.55rem .4rem;line-height:1;transition:color .2s var(--ease);
}
.lang button:hover{color:var(--ink)}
.lang button[aria-pressed="true"]{color:var(--ink);font-weight:700}
.lang span{color:var(--ink-3);font-size:var(--ts)}

/* -------- product sub-nav: only inside a product -------- */
.subnav{position:sticky;top:var(--navh);z-index:49;background:rgba(255,255,255,.92);border-bottom:1px solid var(--hair)}
@supports (backdrop-filter:saturate(180%) blur(14px)){.subnav{backdrop-filter:saturate(180%) blur(14px)}}
.subnav-in{display:flex;align-items:center;gap:1rem;min-height:48px;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}
.subnav-in::-webkit-scrollbar{display:none}
.subnav-title{
  font-size:var(--t0);font-weight:700;letter-spacing:-.022em;color:var(--ink);
  text-decoration:none;white-space:nowrap;flex:0 0 auto;padding-block:.55rem;
}
.subnav-links{display:flex;gap:clamp(.9rem,2vw,1.6rem);margin-left:auto;align-items:center;flex:0 0 auto}
.subnav-links a{
  color:var(--ink-2);text-decoration:none;font-size:var(--ts);font-weight:500;white-space:nowrap;
  padding-block:.62rem;border-bottom:2px solid transparent;transition:color .2s var(--ease);
}
.subnav-links a:hover{color:var(--ink)}
.subnav-links a[aria-current]{color:var(--ink);font-weight:600;border-bottom-color:var(--ink)}

/* -------- shared blocks -------- */
.band{padding-block:var(--band)}
.band--rule{border-top:1px solid var(--hair)}
.band--tight{padding-block:clamp(3rem,6vw,6rem)}
.stmt{font-size:var(--d2);max-width:17ch;letter-spacing:-.034em}
html[lang="ja"] .stmt{max-width:22ch}
.stmt em{font-style:normal;color:var(--ink-soft)}
.stmt-body{margin-top:clamp(1.4rem,3vw,2.2rem);max-width:46ch;color:var(--ink-2);
  font-size:var(--t1);line-height:1.5;letter-spacing:-.012em}
.two{display:grid;gap:clamp(1.8rem,4vw,3.5rem)}
@media (min-width:880px){.two{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}}
.note{max-width:56ch;color:var(--ink-2);font-size:var(--t0);line-height:1.6}
.note strong{color:var(--ink);font-weight:600}
.kick{font-size:var(--ts);color:var(--ink-3);font-weight:500;margin:0 0 .7rem}
.lnk{color:var(--navy);text-decoration:none;font-size:var(--t1);font-weight:500;letter-spacing:-.01em;
  display:inline-flex;align-items:center;gap:.34em;padding-block:.3rem;min-height:24px}
.lnk::after{content:"\203A";font-weight:400;transition:transform .25s var(--ease);display:inline-block}
.lnk:hover{text-decoration:underline;text-underline-offset:.28em}
.lnk:hover::after{transform:translateX(3px)}
.links{display:flex;gap:clamp(1.2rem,3vw,2.2rem);flex-wrap:wrap;margin-top:clamp(1.3rem,2.6vw,1.9rem)}

/* -------- hero -------- */
.hero{padding-top:clamp(3rem,2rem + 5vw,7rem);text-align:center;overflow:hidden}
.hero h1{font-size:var(--d1);margin:0 0 clamp(.9rem,2vw,1.4rem)}
.hero .sub{font-size:var(--t1);color:var(--ink-2);max-width:34ch;margin-inline:auto;
  letter-spacing:-.012em;line-height:1.4}
.hero .links{justify-content:center}
.hero-shot{margin:clamp(1.6rem,4vw,3.4rem) auto 0;max-width:1180px;padding-inline:var(--pad)}
.hero-shot img{width:100%}

/* -------- family index: product rows, not a card grid -------- */
.fam{border-top:1px solid var(--hair)}
.fam-row{
  display:grid;gap:clamp(1rem,3vw,2.5rem);align-items:center;
  padding-block:clamp(1.8rem,4vw,3.2rem);border-bottom:1px solid var(--hair);
}
@media (min-width:820px){.fam-row{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr)}
  .fam-row--flip .fam-txt{order:2}.fam-row--flip .fam-img{order:1}
  /* no photograph yet: one column, no reserved empty half */
  .fam-row--solo{grid-template-columns:minmax(0,1fr)}}
.fam-row--solo .fam-txt p{max-width:62ch}
.fam-img img{width:100%}
.fam-txt h2,.fam-txt h3{font-size:var(--d3);margin:0 0 .55rem}
.fam-txt .meta{font-size:var(--ts);color:var(--ink-3);margin:0 0 .9rem}
.fam-txt p{color:var(--ink-2);max-width:46ch;font-size:var(--t0)}
.fam-figs{display:flex;flex-wrap:wrap;gap:.4rem 1.6rem;margin:1rem 0 0;padding:0;list-style:none}
.fam-figs li{font-size:var(--ts);color:var(--ink-2)}
.fam-figs b{color:var(--ink);font-weight:700}
.soon{display:inline-block;font-size:var(--ts);font-weight:600;color:var(--ink-3);
  border:1px solid var(--hair-str);border-radius:999px;padding:.2rem .65rem;margin-bottom:.9rem}

/* -------- exchange rate: what you get back per distance pedalled -------- */
.xr{margin-top:clamp(1.8rem,4vw,2.8rem);max-width:760px}
.xr-row{display:grid;grid-template-columns:minmax(0,1fr);gap:.4rem;margin-bottom:clamp(1rem,2.2vw,1.5rem)}
.xr-row:last-child{margin-bottom:0}
.xr-lbl{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;
  font-size:var(--ts);color:var(--ink-3);font-weight:500}
.xr-lbl b{font-size:var(--d3);font-weight:700;letter-spacing:-.03em;color:var(--ink);line-height:1}
.xr-row--in .xr-lbl b{color:var(--ink)}
.xr-row--out .xr-lbl b{color:var(--green)}
.xr-bar{height:14px;border:1px solid var(--hair-str);border-radius:2px;overflow:hidden;background:var(--white)}
.xr-fill{height:100%;background:var(--ink)}
.xr-row--out .xr-fill{background:var(--green)}
.xr-note{margin-top:clamp(1.2rem,2.6vw,1.8rem);font-size:var(--ts);color:var(--ink-3);max-width:62ch}
@media (prefers-reduced-motion:no-preference){
  .xr-fill{transform-origin:left;transform:scaleX(0);transition:transform 1.1s var(--ease) .15s}
  .rv.in .xr-fill,.xr.in .xr-fill{transform:scaleX(1)}
}

/* -------- annotated product view -------- */
.figure{position:relative;margin:0}
.figure img{width:100%}
.anno{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.anno line,.anno circle{stroke:var(--ink);stroke-width:1.1;vector-effect:non-scaling-stroke}
.anno circle{fill:none}
.anno circle.g,.anno line.g{stroke:var(--green)}
.anno .lbl{font-family:"Schibsted Grotesk",sans-serif;font-size:19px;font-weight:700;fill:var(--ink);letter-spacing:-.4px}
.anno .val{font-family:"Schibsted Grotesk",sans-serif;font-size:17px;font-weight:500;fill:var(--ink-2)}
.anno .lbl--g{fill:var(--green)}
@media (max-width:860px){.anno{display:none}}
.anno-list{margin:clamp(1.6rem,4vw,2.4rem) 0 0;padding:0;list-style:none;border-top:1px solid var(--hair)}
.anno-list li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.15rem 1.2rem;
  padding:.95rem 0;border-bottom:1px solid var(--hair)}
.anno-list b{grid-column:1;grid-row:1;font-weight:600;letter-spacing:-.012em}
.anno-list span{grid-column:1;grid-row:2;color:var(--ink-3);font-size:var(--ts)}
.anno-list i{grid-column:2;grid-row:1/3;align-self:center;text-align:right;
  font-style:normal;font-weight:700;font-size:var(--t1);letter-spacing:-.02em}
.anno-list .is-g i,.anno-list .is-g b{color:var(--green)}
@media (min-width:861px){.anno-list{display:none}}

/* -------- segmented level control -------- */
.levels{margin-top:clamp(1.8rem,4vw,2.8rem)}
.lv-track{display:flex;margin:0 0 clamp(1.1rem,2.4vw,1.6rem);padding:0;list-style:none;
  border:1px solid var(--hair-str);border-radius:10px;overflow:hidden}
.lv-track li{flex:1;display:flex}
.lv-track button{flex:1;font:inherit;font-weight:600;font-size:var(--ts);color:var(--ink-3);
  background:var(--white);border:0;border-left:1px solid var(--hair-str);
  height:clamp(3.2rem,7vw,4.2rem);cursor:pointer;transition:background .3s var(--ease),color .3s var(--ease)}
.lv-track li:first-child button{border-left:0}
.lv-track button:hover{background:var(--hair-2)}
.lv-track button[aria-pressed="true"]{background:var(--green);color:var(--white)}
.lv-read{display:grid;gap:.2rem 2.4rem;grid-template-columns:repeat(auto-fit,minmax(150px,auto));justify-content:start}
.lv-read div{padding-right:1rem}
.lv-read dt{font-size:var(--ts);color:var(--ink-3);font-weight:500;margin:0 0 .18rem}
.lv-read dd{margin:0;font-size:var(--d3);font-weight:700;letter-spacing:-.028em;line-height:1.1}

/* -------- figure teaser -------- */
.teaser{display:grid;gap:clamp(1.4rem,3vw,2.4rem)}
@media (min-width:760px){.teaser{grid-template-columns:repeat(4,minmax(0,1fr))}}
.teaser div{border-top:1px solid var(--hair);padding-top:clamp(.9rem,2vw,1.2rem)}
.teaser dt{font-size:var(--ts);color:var(--ink-3);font-weight:500;margin:0 0 .3rem}
.teaser dd{margin:0;font-size:var(--d3);font-weight:700;letter-spacing:-.03em;line-height:1.05}
.teaser dd small{font-size:.6em;font-weight:600;letter-spacing:-.01em;color:var(--ink-2)}

/* -------- spec rows -------- */
.rows{margin:clamp(1.2rem,3vw,1.8rem) 0 0;border-top:1px solid var(--hair)}
.rows div{display:grid;grid-template-columns:minmax(8.5rem,36%) minmax(0,1fr);gap:.6rem 1.4rem;
  padding:.85rem 0;border-bottom:1px solid var(--hair);align-items:baseline}
@media (max-width:520px){.rows div{grid-template-columns:1fr;gap:.15rem}}
.rows dt{margin:0;color:var(--ink-3);font-size:var(--ts);font-weight:500}
.rows dd{margin:0;font-size:var(--ts);font-weight:500}
.grp{margin:0 0 clamp(2.4rem,5vw,4rem);scroll-margin-top:calc(var(--navh) + 60px)}
.grp:last-child{margin-bottom:0}
.grp h2{font-size:var(--d3);margin:0 0 clamp(.9rem,2vw,1.3rem)}
.grp dl{margin:0;border-top:1.5px solid var(--ink)}
.grp dl div{display:grid;grid-template-columns:minmax(9rem,38%) minmax(0,1fr);gap:.6rem 1.5rem;
  padding:.92rem 0;border-bottom:1px solid var(--hair);align-items:baseline}
@media (max-width:520px){.grp dl div{grid-template-columns:1fr;gap:.15rem}}
.grp dt{margin:0;color:var(--ink-3);font-size:var(--ts);font-weight:500}
.grp dd{margin:0;font-size:var(--t0);font-weight:500;letter-spacing:-.01em}
.grp dd b{font-weight:700}
.grp dd .g{color:var(--green);font-weight:700}
.sheet{display:grid;gap:clamp(1.6rem,4vw,3.5rem);padding-bottom:clamp(3rem,6vw,6rem)}
@media (min-width:900px){.sheet{grid-template-columns:minmax(0,190px) minmax(0,1fr);align-items:start}}
.toc{position:sticky;top:calc(var(--navh) + 60px);align-self:start;display:none}
@media (min-width:900px){.toc{display:block}}
.toc ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--hair)}
.toc a{display:block;padding:.62rem 0;border-bottom:1px solid var(--hair);
  color:var(--ink-2);text-decoration:none;font-size:var(--ts);font-weight:500;transition:color .2s var(--ease)}
.toc a:hover{color:var(--ink)}
.fn{margin-top:clamp(1.8rem,4vw,2.6rem);padding-top:1.1rem;border-top:1px solid var(--hair);
  color:var(--ink-3);font-size:var(--ts);line-height:1.6;max-width:64ch}
.fn p{margin:0 0 .5em}

/* -------- footer: small mark, one row of links, one line of legal -------- */
.ft{border-top:1px solid var(--hair);padding-block:clamp(2rem,4vw,3rem)}
.ft-top{display:flex;flex-wrap:wrap;align-items:center;gap:.8rem clamp(1.2rem,3vw,2.2rem)}
.ft-mark{flex:0 0 auto;display:flex;align-items:center}
.ft-mark img{width:clamp(88px,10vw,108px)}
.ft-links{display:flex;flex-wrap:wrap;gap:.2rem clamp(1rem,2.4vw,1.8rem);margin-left:auto;align-items:center}
.ft-links a{color:var(--ink-2);text-decoration:none;font-size:var(--ts);font-weight:500;
  padding-block:.3rem;display:inline-block;transition:color .2s var(--ease)}
.ft-links a:hover{color:var(--ink)}
.ft-mail{color:var(--navy) !important}
.ft-btm{margin-top:clamp(1.2rem,2.6vw,1.8rem);padding-top:1rem;border-top:1px solid var(--hair);
  display:flex;flex-wrap:wrap;gap:.3rem 1.4rem;justify-content:space-between;
  color:var(--ink-3);font-size:var(--ts)}
.ft-btm p{margin:0;color:var(--ink-3)}

/* -------- motion -------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}
@media print{
  .nav,.subnav,.lang,.hero .links,.toc,.skip{display:none}
  body{font-size:9.5pt;line-height:1.4}
  .sheet{display:block}
  .grp{break-inside:avoid;margin-bottom:14pt}
  a[href]::after{content:""}
}