:root{
  --bg:#0a0713; --card:rgba(255,255,255,.05); --line:rgba(255,255,255,.1);
  --txt:#f2f0ff; --muted:#9a95b5; --acc:#ff2d95; --acc2:#7c5cff; --acc3:#00e5ff;
  --ok:#2ef2a0;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Space Grotesk',system-ui,sans-serif;color:var(--txt);background:var(--bg);
  min-height:100vh;display:grid;place-items:center;padding:50px 18px;overflow-x:hidden}
.bg-glow{position:fixed;inset:0;background:
  radial-gradient(560px 320px at 80% 12%, rgba(255,45,149,.3), transparent 65%),
  radial-gradient(560px 340px at 12% 88%, rgba(124,92,255,.32), transparent 65%);
  animation:drift 15s ease-in-out infinite alternate}
@keyframes drift{to{transform:scale(1.18) translate(-20px,20px)}}

.wrap{position:relative;width:min(680px,100%);display:grid;gap:20px}
.head{text-align:center;animation:up .7s cubic-bezier(.2,.8,.2,1) both}
.pill{font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--acc3);
  border:1px solid var(--line);padding:7px 15px;border-radius:99px;background:var(--card)}
h1{font-size:clamp(32px,6.5vw,50px);margin:16px 0 8px;letter-spacing:-.02em}
h1 span{background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.head p{color:var(--muted);font-size:15px}
@keyframes up{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

.glass{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:26px;
  backdrop-filter:blur(18px);box-shadow:0 26px 60px rgba(0,0,0,.5);animation:up .7s .1s cubic-bezier(.2,.8,.2,1) both}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:34px;flex-wrap:wrap}
.card-top h2{font-size:18px}
.muted{color:var(--muted);font-size:13px}
.price{font-variant-numeric:tabular-nums;font-weight:700;font-size:22px;letter-spacing:-.02em}
.price i{color:var(--muted);font-style:normal;margin:0 6px;font-weight:400}
.price em{font-style:normal;color:var(--acc2);font-size:15px;margin-left:3px}
.quality{font-weight:700;font-size:18px;padding:8px 16px;border-radius:12px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#0a0713}

/* Dual Slider */
.dual{position:relative;height:44px;margin:0 4px}
.track{position:absolute;top:50%;left:0;right:0;height:8px;transform:translateY(-50%);
  background:rgba(255,255,255,.1);border-radius:99px;overflow:hidden}
.fill{position:absolute;height:100%;left:15%;width:45%;border-radius:99px;
  background:linear-gradient(90deg,var(--acc),var(--acc2),var(--acc3));
  background-size:200% 100%;animation:slide 6s linear infinite;transition:left .12s,width .12s}
@keyframes slide{to{background-position:200% 0}}
.dual input[type=range]{position:absolute;top:50%;left:0;width:100%;transform:translateY(-50%);
  margin:0;background:none;pointer-events:none;-webkit-appearance:none;appearance:none;height:44px;outline:none}
.dual input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;pointer-events:all;
  width:26px;height:26px;border-radius:50%;background:#fff;border:4px solid var(--acc2);
  box-shadow:0 6px 18px rgba(0,0,0,.5), 0 0 0 0 rgba(0,229,255,.4);cursor:grab;transition:.2s;transform:scale(1)}
.dual input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.18);box-shadow:0 6px 18px rgba(0,0,0,.5),0 0 0 8px rgba(0,229,255,.18)}
.dual input[type=range]:active::-webkit-slider-thumb{cursor:grabbing;transform:scale(1.05)}
.dual input[type=range]::-moz-range-thumb{pointer-events:all;width:22px;height:22px;border-radius:50%;
  background:#fff;border:4px solid var(--acc2);cursor:grab}
.bubble{position:absolute;top:-6px;transform:translateX(-50%);padding:5px 11px;border-radius:10px;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;background:linear-gradient(135deg,var(--acc2),var(--acc3));
  color:#0a0713;pointer-events:none;transition:left .12s;white-space:nowrap}
.bubble::after{content:"";position:absolute;left:50%;bottom:-5px;width:10px;height:10px;transform:translateX(-50%) rotate(45deg);
  background:var(--acc3)}
.ticks{display:flex;justify-content:space-between;font-size:11.5px;color:var(--muted);margin-top:16px;
  font-variant-numeric:tabular-nums}

.presets{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap}
.presets button{flex:1;min-width:110px;padding:12px;border-radius:14px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--txt);font-family:inherit;font-size:14px;cursor:pointer;transition:.3s}
.presets button:hover{transform:translateY(-3px);border-color:var(--acc2)}
.presets button.on{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#0a0713;
  border-color:transparent;font-weight:600;box-shadow:0 12px 26px rgba(255,45,149,.35)}

/* Single Slider */
.single{display:flex;align-items:center;gap:14px}
.qi{font-size:12.5px;font-weight:700;color:var(--muted);letter-spacing:.08em}
.qi.hi{color:var(--acc3)}
.single input[type=range]{flex:1;-webkit-appearance:none;appearance:none;height:8px;border-radius:99px;outline:none;
  background:linear-gradient(90deg,var(--acc2) 0%, var(--acc2) 33%, rgba(255,255,255,.12) 33%)}
.single input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:24px;height:24px;border-radius:50%;
  background:#fff;border:4px solid var(--acc);cursor:grab;box-shadow:0 6px 16px rgba(0,0,0,.5);transition:.2s}
.single input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}
.single input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#fff;border:4px solid var(--acc)}
.steps{display:flex;justify-content:space-between;margin-top:16px;font-size:12.5px;color:var(--muted)}
.steps span{transition:.3s;padding:4px 8px;border-radius:8px}
.steps span.on{color:#0a0713;background:linear-gradient(135deg,var(--acc2),var(--acc3));font-weight:700}
.meter{height:5px;margin-top:18px;border-radius:99px;background:rgba(255,255,255,.1);overflow:hidden}
.meter i{display:block;height:100%;width:33%;border-radius:99px;transition:width .4s cubic-bezier(.2,.8,.2,1);
  background:linear-gradient(90deg,var(--acc2),var(--acc3))}

@media (max-width:640px){
  .glass{padding:20px}
  .card-top{margin-bottom:44px}
  .price{font-size:19px}
  .presets button{min-width:0;padding:11px 8px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition-duration:.01ms!important}}