:root{
  color-scheme:dark;
  --bg:#0E0F11; --bg-2:#15171A; --bg-3:#1C1F23;
  --text:#ECEEF0; --muted:#98A0A8; --line:rgba(236,238,240,.12);
  --red:#D9263C; --red-hi:#E8384D;
  --amb:120,140,160;           /* ambient light, set from JS by temperature */
  --display:'Geologica',system-ui,sans-serif; --body:'Onest',system-ui,sans-serif;
  --r:20px;                    /* containers 20px, controls are pills */
  --nav-h:82px;
  --ease:cubic-bezier(.32,.72,0,1);
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;background:var(--bg);overflow-x:clip}
body{background:var(--bg);color:var(--text);font:400 1.0625rem/1.6 var(--body);-webkit-font-smoothing:antialiased;overflow-x:clip}
a{color:inherit}
:focus-visible{outline:2px solid var(--red-hi);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.03em;line-height:1.02}

/* buttons: pill controls; containers use 20px (documented radius rule) */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:14px;white-space:nowrap;font:600 1rem var(--body);min-height:52px;padding:.4em .45em .4em 1.6em;border:0;border-radius:999px;background:var(--red);color:#fff;text-decoration:none;cursor:pointer;transition:background .5s var(--ease),transform .5s var(--ease)}
.btn:hover{background:var(--red-hi)}
.btn:active{transform:scale(.98)}
.btn-ic{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;flex:none;transition:transform .5s var(--ease),background .5s var(--ease)}
.btn-ic::before{content:"";width:18px;height:18px;background:#fff;-webkit-mask:url(icons/arrow-up-right.svg) center/contain no-repeat;mask:url(icons/arrow-up-right.svg) center/contain no-repeat}
.btn:hover .btn-ic{transform:translate(2px,-1px) scale(1.06);background:rgba(255,255,255,.28)}
.btn-ghost{background:transparent;box-shadow:inset 0 0 0 1.5px rgba(236,238,240,.32);padding:.4em 1.7em}
.btn-ghost:hover{background:rgba(236,238,240,.08)}
.btn-sm{min-height:42px;padding:.3em .35em .3em 1.2em;gap:10px;font-size:.95rem}
.btn-sm .btn-ic{width:30px;height:30px}.btn-sm .btn-ic::before{width:15px;height:15px}

/* nav: floating glass island */
.nav{position:fixed;inset:max(12px,env(safe-area-inset-top)) 0 auto 0;z-index:40;display:flex;justify-content:center;padding-inline:12px;pointer-events:none}
.nav-pill{pointer-events:auto;width:min(1180px,100%);height:58px;display:flex;align-items:center;gap:28px;padding:0 8px 0 24px;border-radius:999px;
  background:rgba(18,19,22,.55);backdrop-filter:blur(20px) saturate(140%);-webkit-backdrop-filter:blur(20px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 0 0 1px rgba(255,255,255,.07),0 14px 40px -12px rgba(0,0,0,.6)}
.brand{display:flex;align-items:baseline;gap:10px;text-decoration:none;white-space:nowrap}
.brand-main{font:700 1.05rem var(--display);letter-spacing:.14em}
.brand-sub{font:300 .95rem var(--display);color:var(--muted)}
.nav-links{display:flex;gap:26px;margin-inline:auto;font-size:.95rem}
.nav-links a{text-decoration:none;color:var(--muted);transition:color .4s var(--ease);white-space:nowrap}
.nav-links a:hover{color:var(--text)}
.nav-end{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-links + .nav-end{margin-left:0}
.lang{display:flex;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.lang button{font:600 .8rem var(--body);min-height:42px;min-width:44px;padding:0 .8em;border:0;background:transparent;color:var(--muted);cursor:pointer}
.lang button[aria-pressed=true]{background:rgba(236,238,240,.12);color:var(--text)}
.burger{display:none;width:42px;height:42px;border-radius:50%;border:0;background:rgba(236,238,240,.1);position:relative;cursor:pointer}
.burger i{position:absolute;left:12px;right:12px;height:1.5px;background:var(--text);border-radius:2px;transition:transform .6s var(--ease),top .6s var(--ease)}
.burger i:nth-child(1){top:16px}.burger i:nth-child(2){top:25px}
.burger[aria-expanded=true] i:nth-child(1){top:20.5px;transform:rotate(45deg)}
.burger[aria-expanded=true] i:nth-child(2){top:20.5px;transform:rotate(-45deg)}

/* full-screen menu */
.menu{position:fixed;inset:0;z-index:30;display:flex;flex-direction:column;justify-content:center;gap:36px;padding:96px 28px 40px;background:rgba(10,11,13,.88);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);opacity:0;visibility:hidden;transition:opacity .6s var(--ease),visibility 0s .6s}
.menu.open{opacity:1;visibility:visible;transition:opacity .6s var(--ease)}
.menu-links{display:grid;gap:6px}
.menu-links a{font:600 clamp(1.9rem,8.5vw,2.8rem)/1.15 var(--display);letter-spacing:-.03em;text-decoration:none;padding:10px 0;opacity:0;transform:translateY(40px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.menu.open .menu-links a{opacity:1;transform:none}
.menu.open .menu-links a:nth-child(1){transition-delay:.08s}.menu.open .menu-links a:nth-child(2){transition-delay:.14s}
.menu.open .menu-links a:nth-child(3){transition-delay:.2s}.menu.open .menu-links a:nth-child(4){transition-delay:.26s}
.menu-cta{align-self:flex-start;opacity:0;transform:translateY(40px);transition:opacity .7s var(--ease) .32s,transform .7s var(--ease) .32s,background .5s var(--ease)}
.menu.open .menu-cta{opacity:1;transform:none}
html.menu-open{overflow:hidden}

/* hero */
.hero{position:relative;min-height:100dvh;display:grid;align-items:center;padding:calc(var(--nav-h) + 24px) clamp(16px,3vw,40px) 56px;max-width:1400px;margin-inline:auto;overflow:visible}
.hero-glow{position:absolute;inset:-10% 0 -10% 10%;pointer-events:none;z-index:0;
  background:radial-gradient(48% 52% at 68% 52%,rgba(var(--amb),.20),transparent 68%),radial-gradient(30% 36% at 78% 70%,rgba(217,38,60,.16),transparent 70%);transition:background .4s}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:1;background:radial-gradient(120% 90% at 70% 50%,transparent 45%,rgba(7,8,9,.75) 100%)}
.hero-tire{position:absolute;right:calc(-6vw);top:0;width:min(66vw,1000px);height:100%;z-index:1}
.hero-tire canvas,.weather-tire canvas{display:block;width:100%;height:100%}
.hero-copy{position:relative;z-index:3;max-width:56rem}
.hero h1{font-size:clamp(2.7rem,6.1vw,5.6rem);font-weight:600;margin-bottom:28px}
@media (min-width:901px){.hero h1 .line{white-space:nowrap}}
.line{display:block;overflow:hidden;padding-bottom:.08em;margin-bottom:-.08em}
.inner{display:block}
.hero-sub{max-width:34ch;font-size:1.2rem;color:#c3c8ce;margin-bottom:36px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}

/* weather */
.weather{position:relative;min-height:100dvh;background:var(--bg);overflow:hidden}
.weather::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 70% at 72% 50%,rgba(var(--amb),.26),transparent 70%);transition:background .3s}
.weather-in{position:relative;max-width:1400px;margin-inline:auto;min-height:100dvh;padding:calc(var(--nav-h) + 16px) clamp(16px,3vw,40px) 40px;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:center;gap:24px}
.weather h2{font-size:clamp(1.1rem,1.6vw,1.4rem);font-weight:500;letter-spacing:-.01em;color:var(--muted);margin-bottom:6px}
.deg{display:flex;align-items:flex-start;line-height:.9;margin-bottom:22px}
.deg output{font:300 clamp(6.5rem,16vw,15rem)/.85 var(--display);letter-spacing:-.06em;font-variant-numeric:tabular-nums;min-width:2.1ch}
.deg-unit{font:300 clamp(1.8rem,4vw,3.4rem) var(--display);color:var(--muted);margin-top:.35em;margin-left:.1em}
.verdict{max-width:38ch;margin-bottom:28px}
.verdict-name{display:flex;align-items:center;gap:12px;font:600 clamp(1.4rem,2.4vw,2rem) var(--display);letter-spacing:-.02em;margin-bottom:8px}
.verdict p{color:#c3c8ce;min-height:3.2em}
.ico{width:28px;height:28px;background:var(--red);flex:none;-webkit-mask:var(--icon) center/contain no-repeat;mask:var(--icon) center/contain no-repeat}
.controls{display:grid;gap:22px;max-width:30rem}
.seg{display:inline-flex;justify-self:start;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.seg button{font:600 .95rem var(--body);min-height:46px;padding:0 1.4em;border-radius:999px;border:0;background:transparent;color:var(--muted);cursor:pointer;transition:background .2s,color .2s}
.seg button[aria-pressed=true]{background:var(--text);color:#0E0F11}
.range{display:block}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:44px;background:transparent;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:3px;border-radius:2px;background:linear-gradient(90deg,#7FA3BF,#D8D4C8 55%,#E9A44A)}
input[type=range]::-moz-range-track{height:3px;border-radius:2px;background:linear-gradient(90deg,#7FA3BF,#D8D4C8 55%,#E9A44A)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;margin-top:-9.5px;touch-action:pan-y;border-radius:50%;background:#fff;border:0;box-shadow:0 0 0 5px rgba(217,38,60,.55)}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:0;box-shadow:0 0 0 5px rgba(217,38,60,.55)}
.range-scale{display:flex;justify-content:space-between;font:400 .8rem var(--body);color:var(--muted);font-style:normal}
.range-scale i{font-style:normal}
.weather-tire{position:relative;height:min(82dvh,860px);min-height:360px}

/* no-webgl fallback */
.no-webgl .hero-tire,.no-webgl .weather-tire{display:none}
.no-webgl .weather-in{grid-template-columns:1fr}


/* ---------- stage 2: shared section frame ---------- */
.catalog,.why,.dealers,.b2b{padding-block:clamp(72px,11vw,150px);position:relative}
.sec-in{max-width:1400px;margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}
.catalog h2,.why h2,.dealers h2,.b2b h2{font-size:clamp(2rem,4.6vw,3.8rem);max-width:18ch;margin-bottom:20px}
.sec-sub{max-width:52ch;color:#b4bac1;font-size:1.1rem;margin-bottom:36px}

/* catalog */
.cat-tools{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;margin-bottom:18px}
.size-pick{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.size-pick select{font:500 1rem var(--body);min-height:46px;min-width:96px;padding:0 1.1em;border:0;border-radius:999px;background:rgba(236,238,240,.08);color:var(--text);cursor:pointer}
.size-pick select option{background:#1C1F23;color:var(--text)}
.link-btn{background:none;border:0;color:var(--muted);font:500 .95rem var(--body);text-decoration:underline;text-underline-offset:3px;cursor:pointer;min-height:46px;padding:0 .6em}
.link-btn:hover{color:var(--text)}
.count{color:var(--muted);font-size:.95rem;min-height:1.6em}
.rail-wrap{margin-top:10px}
.rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:max(16px,calc((100vw - 1400px)/2 + 40px));padding:6px max(16px,calc((100vw - 1400px)/2 + 40px)) 28px;scrollbar-width:thin;scrollbar-color:rgba(236,238,240,.25) transparent;overscroll-behavior-x:contain}
.rail::-webkit-scrollbar{height:6px}.rail::-webkit-scrollbar-thumb{background:rgba(236,238,240,.22);border-radius:6px}
.plate{flex:0 0 min(370px,84vw);scroll-snap-align:start;min-height:640px;display:flex;flex-direction:column;padding:26px 28px 28px;border-radius:var(--r);position:relative;overflow:hidden;
  background:linear-gradient(165deg,var(--p1),var(--p2));box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 0 0 1px rgba(255,255,255,.06),0 24px 50px -24px rgba(0,0,0,.7)}
.plate[data-season=winter]{--p1:#1d2832;--p2:#12161a}
.plate[data-season=summer]{--p1:#2a2118;--p2:#14120f}
.plate[data-type=sport]{--p1:#2d1519;--p2:#140c0e}
.plate-photo{position:relative;height:250px;display:grid;place-items:center;margin:0 -6px 6px}
.plate-code{position:absolute;left:2px;top:0;font:300 clamp(4.6rem,8vw,6.2rem)/.8 var(--display);letter-spacing:-.06em;color:rgba(236,238,240,.09);user-select:none}
.ph{position:absolute;inset:0;margin:auto;width:88%;height:100%;object-fit:contain;filter:drop-shadow(0 22px 22px rgba(0,0,0,.6));transition:opacity .7s var(--ease),transform .9s var(--ease)}
.ph.b{opacity:0;transform:scale(.96)}
.plate-photo{overflow:visible}
.plate:hover .ph.a,.plate:focus-within .ph.a{opacity:0;transform:scale(1.04)}
.plate:hover .ph.b,.plate:focus-within .ph.b{opacity:1;transform:none}
.plate-body{display:grid;gap:10px;margin-top:auto;padding-top:12px}
.plate-season{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.9rem}
.plate-season .ico{width:20px;height:20px}
.plate h3{font-size:1.5rem;letter-spacing:-.02em}
.plate p{color:#c3c8ce;font-size:.98rem;line-height:1.5}
.sizes{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.sizes span{font-size:.8rem;font-variant-numeric:tabular-nums;padding:4px 10px;border-radius:999px;background:rgba(236,238,240,.08);color:#d4d8dc}
.sizes span.hit{background:var(--red);color:#fff}
.sizes span.more{background:transparent;box-shadow:inset 0 0 0 1px var(--line);color:var(--muted)}
.plate .btn{margin-top:14px;align-self:flex-start}
.empty{padding:40px max(16px,calc((100vw - 1400px)/2 + 40px));color:var(--muted)}
.rail-nav{display:flex;gap:12px;justify-content:flex-end;padding-top:6px}
.round{width:52px;height:52px;border-radius:50%;border:0;background:rgba(236,238,240,.1);cursor:pointer;display:grid;place-items:center;transition:background .4s var(--ease),transform .4s var(--ease)}
.round:hover{background:rgba(236,238,240,.18)}.round:active{transform:scale(.95)}
.round::before{content:"";width:22px;height:22px;background:var(--text);-webkit-mask:var(--ic) center/contain no-repeat;mask:var(--ic) center/contain no-repeat}
#railPrev{--ic:url(icons/caret-left.svg)}#railNext{--ic:url(icons/caret-right.svg)}

/* why: asymmetric bento */
.bento{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto;gap:20px;margin-top:44px}
.tile{position:relative;overflow:hidden;border-radius:var(--r);padding:clamp(26px,3.2vw,44px);display:flex;flex-direction:column;justify-content:flex-end;gap:12px;min-height:260px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 0 0 1px rgba(255,255,255,.06)}
.tile h3{font-size:clamp(1.5rem,2.4vw,2.2rem);letter-spacing:-.025em}
.tile p{color:#c3c8ce;max-width:42ch}
.tile-origin{grid-row:span 2;min-height:540px;background:radial-gradient(90% 70% at 20% 10%,#2a2d33,#14161a)}
.tile-bg{position:absolute;top:-4%;left:-2%;font:300 clamp(9rem,22vw,19rem)/.8 var(--display);letter-spacing:-.07em;color:rgba(236,238,240,.07);user-select:none}
.tile-ice{background:linear-gradient(150deg,#22313d,#12171b)}
.tile-advan{background:linear-gradient(150deg,#3a1720,#150d0f)}

/* dealers: oversized city index */
.cities{list-style:none;padding:0;border-top:1px solid var(--line)}
.cities li{border-bottom:1px solid var(--line)}
.city{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;background:none;border:0;color:rgba(236,238,240,.5);cursor:pointer;text-align:left;
  font:500 clamp(2.2rem,7vw,5.2rem)/1.1 var(--display);letter-spacing:-.035em;padding:clamp(14px,2vw,24px) 0;transition:color .5s var(--ease)}
.city > span:first-child{transition:transform .5s var(--ease)}
.city:hover,.city[aria-expanded=true]{color:var(--text)}
.city:hover > span:first-child{transform:translateX(10px)}
.city .plus{width:48px;height:48px;border-radius:50%;background:rgba(236,238,240,.1);display:grid;place-items:center;flex:none;transition:transform .6s var(--ease),background .5s var(--ease)}
.city .plus::before{content:"";width:20px;height:20px;background:var(--text);-webkit-mask:url(icons/plus.svg) center/contain no-repeat;mask:url(icons/plus.svg) center/contain no-repeat}
.city[aria-expanded=true] .plus{transform:rotate(45deg);background:var(--red)}
.city-info{display:grid;grid-template-rows:0fr;transition:grid-template-rows .6s var(--ease)}
.city[aria-expanded=true] + .city-info{grid-template-rows:1fr}
.city-info > div{overflow:hidden}
.city-info p{padding:0 0 26px;max-width:56ch;color:#b4bac1}

/* b2b */
.b2b-panel{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);padding:clamp(28px,5vw,68px);border-radius:28px;color:#fff;
  background:linear-gradient(140deg,#D9263C,#B21C30);box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 40px 80px -40px rgba(0,0,0,.8)}
.b2b h2{max-width:14ch;margin-bottom:18px}
.b2b-copy p{font-size:1.15rem;max-width:34ch;color:rgba(255,255,255,.92)}
.b2b form{display:grid;gap:14px}
.b2b label{display:grid;gap:6px;font-weight:500;font-size:.95rem}
.b2b input,.b2b select,.b2b textarea{font:inherit;color:var(--text);min-height:52px;padding:14px 16px;border:0;border-radius:14px;background:rgba(10,11,13,.86)}
.b2b textarea{resize:vertical;min-height:96px}
.b2b input::placeholder{color:#8d949b}
.b2b input:focus-visible,.b2b select:focus-visible,.b2b textarea:focus-visible{outline:2px solid #fff;outline-offset:2px}
.b2b :focus-visible{outline-color:#fff}
.btn-light{background:#fff;color:#0E0F11;justify-self:start}
.btn-light:hover{background:#f1f2f4}
.btn-light .btn-ic{background:rgba(14,15,17,.1)}
.btn-light .btn-ic::before{background:#0E0F11}
.err{font-weight:600;background:rgba(10,11,13,.55);padding:10px 14px;border-radius:12px}
.ok{font-weight:600;background:rgba(10,11,13,.55);padding:14px 16px;border-radius:12px}
.err[hidden],.ok[hidden]{display:none}

/* footer */
.foot{border-top:1px solid var(--line);padding:48px clamp(16px,3vw,40px) max(40px,env(safe-area-inset-bottom));color:var(--muted);font-size:.92rem}
.foot-in{max-width:1400px;margin-inline:auto;display:grid;grid-template-columns:1fr auto;gap:24px 48px}
.foot strong{color:var(--text);font-family:var(--display);letter-spacing:.14em}
.foot-links{display:flex;gap:24px;flex-wrap:wrap}
.foot-links a{text-decoration:none;color:var(--muted);transition:color .4s var(--ease)}
.foot-links a:hover{color:var(--text)}
.foot-note{grid-column:1/-1;max-width:70ch}

@media (max-width:900px){
  .bento{grid-template-columns:1fr}
  .tile-origin{grid-row:auto;min-height:380px}
  .b2b-panel{grid-template-columns:1fr}
  .rail-nav{display:none}
  .plate{min-height:600px}
  .plate-photo{height:220px}
  .foot-in{grid-template-columns:1fr}
}

@media (max-width:1000px){
  .nav-links{display:none}
  .brand-sub{display:none}
  .nav-pill{padding-left:20px;gap:12px}
  .nav-links + .nav-end{margin-left:auto}
  .nav-cta{display:none}
  .burger{display:block}
}
@media (min-width:1001px){.menu{display:none}}
@media (max-width:900px){
  .hero{display:flex;flex-direction:column;justify-content:flex-end;align-items:stretch;padding-top:calc(var(--nav-h) + 12px);padding-bottom:max(36px,env(safe-area-inset-bottom))}
  .hero-tire{position:relative;left:auto;right:auto;top:auto;width:100%;height:42dvh;flex:none;margin-bottom:6px}
  .hero-glow{inset:-5% -20% 30% -20%}
  .hero h1{font-size:clamp(2.1rem,9.5vw,3.4rem)}
  .hero-sub{font-size:1.08rem}
  .weather-in{grid-template-columns:1fr;align-content:start;padding-top:calc(var(--nav-h) + 4px);gap:0}
  .weather-tire{order:-1;height:36dvh;min-height:240px;margin-inline:-16px}
  .deg output{font-size:clamp(5rem,26vw,8rem)}
  .deg{margin-bottom:10px}
  .verdict{margin-bottom:16px}
  .verdict p{min-height:0;font-size:.98rem}
  .controls{gap:12px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition-duration:.01ms!important;transition-delay:0s!important}
  .city:hover > span:first-child{transform:none}
}

/* tablet: one centered column, tire centered above the copy */
@media (min-width:601px) and (max-width:900px){
  .hero{align-items:center}
  .hero-copy{margin-inline:auto;text-align:center;max-width:36rem}
  .hero-sub{margin-inline:auto}
  .hero-cta{justify-content:center}
  .hero-tire{height:48dvh}
  .weather-in{justify-items:center;text-align:center;max-width:44rem}
  .weather-tire{width:100%;margin-inline:0}
  .deg,.verdict-name{justify-content:center}
  .verdict{margin-inline:auto}
  .controls{justify-items:center;width:100%;max-width:30rem;margin-inline:auto}
  .range{width:100%}
}
/* very wide: keep composition in the centered 1400 frame */
@media (min-width:1500px){.hero-tire{right:calc(-3vw + (100vw - 1400px)/-2*0)}}