.bt{margin-top:40px;position:relative}.bt-sticky{grid-template-rows:1fr auto;height:100svh;padding:110px max(24px,50vw - 640px) 48px;display:grid;position:sticky;top:0;overflow:hidden}.bt-dial{aspect-ratio:1;border:1px solid var(--border);pointer-events:none;border-radius:50%;width:min(60vh,600px);position:absolute;top:50%;right:max(-12vw,-180px);transform:translateY(-62%)}.bt-dial i{transform-origin:bottom;width:1px;height:50%;transform:rotate(var(--a));position:absolute;top:0;left:50%}.bt-dial i:before{content:"";background:var(--border);width:1px;height:10px;position:absolute;top:10px;left:0}.bt-dial i.is-major:before{background:var(--muted-foreground);opacity:.5;height:22px}.bt-hand{transform-origin:top;width:1px;height:46%;transform:rotate(calc(180deg + var(--bt-p,0) * 300deg));background:var(--foreground);position:absolute;top:50%;left:50%}.bt-hand:before{content:"";background:var(--foreground);border-radius:50%;width:11px;height:11px;position:absolute;top:-5px;left:-5px}.bt-count{letter-spacing:.24em;color:var(--muted-foreground);font-size:11px;position:absolute;top:110px;left:max(24px,50vw - 640px)}.bt-count b{color:var(--foreground);font-weight:600}.bt-stage{align-self:center;height:min(52vh,440px);position:relative}.bt-slide{pointer-events:none;flex-direction:column;justify-content:center;display:flex;position:absolute;inset:0}.bt-year{letter-spacing:-.02em;color:var(--foreground);padding-bottom:.04em;font-size:clamp(96px,17vw,240px);font-weight:200;line-height:.82;display:flex;overflow:hidden}.bt-year span{transition:transform 1s cubic-bezier(.77,0,.18,1);transition-delay:calc(var(--k) * 60ms);display:inline-block;transform:translateY(105%)}.bt-slide.is-past .bt-year span{transform:translateY(-105%)}.bt-slide.is-active .bt-year span{transform:none}.bt-copy{border-left:1px solid var(--border);max-width:460px;margin-top:36px;padding-left:24px}.bt-copy>*{opacity:0;transition:opacity .6s,transform .9s cubic-bezier(.22,1,.36,1);transform:translateY(24px)}.bt-slide.is-past .bt-copy>*{transform:translateY(-24px)}.bt-slide.is-active .bt-copy>*{opacity:1;transition-delay:.3s;transform:none}.bt-slide.is-active .bt-copy p{transition-delay:.42s}.bt-copy h3{text-transform:none;letter-spacing:0;font-size:22px;font-weight:500}.bt-copy p{color:var(--muted-foreground);margin-top:12px;font-size:14px;line-height:1.75}.bt-rail{grid-template-columns:repeat(6,1fr);display:grid;position:relative}.bt-line{background:var(--border);height:1px;position:absolute;top:6px;left:0;right:0}.bt-line i{transform-origin:0;transform:scaleX(var(--bt-p,0));background:var(--foreground);position:absolute;inset:0}.bt-tab{color:var(--muted-foreground);cursor:pointer;text-align:left;background:0 0;border:0;flex-direction:column;align-items:flex-start;gap:10px;padding:0 12px 0 0;transition:color .4s;display:flex}.bt-tab.is-active,.bt-tab:hover{color:var(--foreground)}.bt-dot{background:var(--background);border:1px solid var(--muted-foreground);border-radius:50%;width:13px;height:13px;margin-bottom:6px;transition:all .4s}.bt-tab.is-past .bt-dot{background:var(--foreground);border-color:var(--foreground);transform:scale(.55)}.bt-tab.is-active .bt-dot{background:var(--foreground);border-color:var(--foreground);box-shadow:0 0 0 6px var(--background), 0 0 0 7px var(--border)}.bt-tab-year{letter-spacing:.18em;font-size:12px}.bt-tab.is-active .bt-tab-year{font-weight:700}.bt-tab-title{opacity:.7;font-size:11px;line-height:1.4}@media (width<=860px){.bt-sticky{padding:90px 20px 28px}.bt-dial{opacity:.7;width:120vw;right:-60vw}.bt-count{top:90px;left:20px}.bt-year{font-size:30vw}.bt-copy{margin-top:24px;padding-left:16px}.bt-copy h3{font-size:19px}.bt-copy p{font-size:13px}.bt-tab-title{display:none}.bt-tab-year{letter-spacing:.06em;font-size:10px}}@media (prefers-reduced-motion:reduce){.bt *{transition:none!important}}