.bt{display:flex;flex-direction:column;gap:20px;font-family:var(--body);color:var(--ink)}
.bt *{box-sizing:border-box}
.bt-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.bt-eye{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--accent)}
.bt-eye svg{width:15px;height:15px;animation:bt-tick 2.4s ease-in-out infinite}
.bt-head h2{margin:2px 0 0;font-size:clamp(24px,3.2vw,30px);line-height:1.25;font-weight:700}
.bt-sub{margin:4px 0 0;font-size:14px;color:var(--muted)}
.bt-nav{display:none;gap:8px;margin-left:auto}
.bt-nav button{all:unset;cursor:pointer;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;border:1.5px solid var(--line);color:var(--ink);transition:border-color .2s,opacity .2s}
.bt-nav button:disabled{opacity:.35;cursor:default}
.bt-nav button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.bt-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.bt-card{position:relative;display:flex;flex-direction:column;gap:16px;padding:18px;border-radius:22px;background:var(--card);border:1px solid var(--line);color:inherit;text-decoration:none;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s,border-color .3s;animation:bt-in .5s cubic-bezier(.2,.8,.2,1) both}
.bt-card:hover{transform:translateY(-5px);border-color:color-mix(in srgb,var(--accent) 35%,var(--line));box-shadow:0 24px 40px -28px color-mix(in srgb,var(--accent) 60%,transparent)}
.bt-card:focus-visible{outline:3px solid var(--accent);outline-offset:3px}

.bt-row{display:flex;align-items:center;gap:12px}
.bt-thumb{width:56px;height:56px;flex:none;border-radius:14px;overflow:hidden;background:var(--soft2);border:1px solid var(--line);display:grid;place-items:center;color:var(--accent)}
.bt-thumb img{width:100%;height:100%;object-fit:cover}
.bt-thumb svg{width:28px;height:28px;opacity:.75}
.bt-name{margin:0;font-size:15px;font-weight:600;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bt-go{margin-left:auto;flex:none;align-self:flex-start;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--soft2);color:var(--accent-deep);transition:transform .35s cubic-bezier(.3,1.4,.5,1),background .2s,color .2s}
.bt-card:hover .bt-go{transform:rotate(-45deg);background:var(--accent);color:#fff}

/* timeline */
.bt-tl{position:relative;padding:34px 0 0}
.bt-tl svg{display:block;width:100%;height:46px;overflow:visible}
.bt-tl .l{fill:none;stroke:var(--accent);stroke-width:2;stroke-linejoin:round;stroke-linecap:round;vector-effect:non-scaling-stroke;stroke-dasharray:100;animation:bt-draw 1.1s .35s cubic-bezier(.4,.1,.2,1) both}
.bt-tl .a{animation:bt-fade .6s .9s both}
.bt-card:hover .bt-tl .l{animation:bt-draw .9s cubic-bezier(.4,.1,.2,1)}
.bt-pin{position:absolute;top:0;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none;animation:bt-drop .5s 1.1s cubic-bezier(.3,1.5,.5,1) both}
.bt-pin span{padding:2px 9px;border-radius:999px;background:var(--accent);color:#fff;font-size:11.5px;font-weight:700;white-space:nowrap;box-shadow:0 6px 14px -8px var(--accent)}
.bt-pin.r span{transform:translateX(-32%)}.bt-pin.l span{transform:translateX(32%)}
.bt-pin i{width:2px;height:calc(var(--y) * 1px + 12px);background:linear-gradient(var(--accent),transparent);opacity:.6}
.bt-lowdot{position:absolute;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--card);animation:bt-fade .3s 1.1s both}
.bt-lowdot::after{content:"";position:absolute;inset:0;border-radius:50%;background:var(--accent);animation:bt-ping 1.8s 1.6s infinite}
.bt-now{position:absolute;right:0;width:9px;height:9px;margin:-4.5px -4.5px 0 0;border-radius:50%;background:var(--card);box-shadow:inset 0 0 0 2.5px var(--ink);animation:bt-fade .3s 1.3s both}
.bt-axis{display:flex;justify-content:space-between;margin-top:6px;font-size:11.5px;color:var(--muted)}

/* prices */
.bt-prices{display:grid;grid-template-columns:1fr auto;align-items:end;gap:6px 12px;padding-top:14px;border-top:1px dashed var(--line)}
.bt-prices small{display:block;font-size:12px;color:var(--muted)}
.bt-low{font-size:28px;line-height:1.1;font-weight:700;color:var(--accent-deep);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.bt-cur{text-align:right}
.bt-cur b{font-size:16px;font-variant-numeric:tabular-nums}
.bt-gap{grid-column:1/-1;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.bt-chip{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font-weight:700;font-size:12px;background:var(--soft);color:var(--accent-deep)}
.bt-chip.near{background:var(--ok-soft);color:var(--ok)}
.bt-chip svg{width:12px;height:12px}

@keyframes bt-in{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes bt-draw{from{stroke-dashoffset:100}to{stroke-dashoffset:0}}
@keyframes bt-fade{from{opacity:0}to{opacity:1}}
@keyframes bt-drop{from{opacity:0;transform:translate(-50%,-12px)}to{opacity:1;transform:translateX(-50%)}}
@keyframes bt-ping{0%{opacity:.6;transform:scale(1)}100%{opacity:0;transform:scale(3)}}
@keyframes bt-tick{0%,100%{transform:rotate(0)}10%{transform:rotate(-12deg)}20%{transform:rotate(10deg)}30%{transform:rotate(0)}}
@media (max-width:700px){
  .bt-nav{display:flex}
  .bt-list{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:12px;margin:0 -16px;padding:4px 16px 18px;scrollbar-width:none}
  .bt-list::-webkit-scrollbar{display:none}
  .bt-card{flex:0 0 84%;scroll-snap-align:center}
  .bt-card:hover{transform:none}
}
@media (prefers-reduced-motion:reduce){.bt *{animation:none!important;transition:none!important}}

.bt{margin-top:48px;--ok:var(--accent-deep);--ok-soft:var(--soft)}.bt-card{font:inherit;text-align:left;cursor:pointer;width:100%;min-width:0}.bt-gap{flex-wrap:wrap}.bt-nav{height:auto}.bt-head h2{color:var(--ink)}.bt-list{grid-template-columns:repeat(3,minmax(0,1fr))}.bt-eye svg,.bt-lowdot::after{animation-iteration-count:3}.bt:not(.bt-visible) *{animation-play-state:paused!important}@media(max-width:700px){.bt{margin-top:34px}.bt-head h2{font-size:23px}.bt-sub{font-size:12px}.bt-eye{font-size:11px}.bt-list{margin:0 -8px;padding:4px 8px 18px}.bt-card{flex-basis:88%}.bt-nav button{width:36px;height:36px}}