:root{
  --bg:#0b1020; --panel:#0f172a; --mut:#94a3b8; --fg:#e2e8f0;
  --grid:#223054; --axis:#9fb4ff; --line:#60a5fa; --point:#1d4ed8; --fill:rgba(96,165,250,.14);
  --marker:#f59e0b;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:#0b1224;color:var(--fg);font:16px/1.5 system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
h1{margin:0 0 .35rem}
.site-header{padding:1.1rem 1rem;border-bottom:1px solid #16213b;background:radial-gradient(1200px 300px at 20% -20%, #0e1730 0%, #0b1224 60%, #091026 100%)}
.site-header p{color:var(--mut);margin:.2rem 0 0}

.controls{padding:1rem;border-bottom:1px solid #16213b;background:#0b1224}
.control{background:#0f152a;border:1px solid #1b2443;border-radius:14px;padding:.9rem}
.label-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.year-chip{background:#0e1630;border:1px solid #1d2b53;border-radius:999px;padding:.25rem .6rem;color:#dbeafe}

.range2{padding:.25rem 0}
.rail{position:relative;height:20px;background:#0e1630;border:1px solid #1c2648;border-radius:999px}
.fill{position:absolute;top:0;bottom:0;left:0;width:0;background:linear-gradient(90deg, rgba(59,130,246,.25), rgba(59,130,246,.5))}
.ticks{position:absolute;inset:0;pointer-events:none}
.ticks span{position:absolute;top:-6px;bottom:-6px;width:2px;background:#1e2a4a;opacity:.7}

.thumb{position:absolute;top:50%;transform:translate(-50%,-50%);width:18px;height:18px;border-radius:50%;
  background:#3b82f6;border:2px solid #93c5fd;box-shadow:0 0 0 4px rgba(59,130,246,.15);cursor:grab}
.thumb:active{cursor:grabbing}

.micro-note{color:#9fb4ff;font-size:.85rem;margin-top:.6rem;opacity:.9}

.chart-wrap{position:relative;padding:1rem}
canvas#chart{width:100%;height:62vh;display:block;background:#0f152a;border:1px solid #1b2443;border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.tooltip{position:absolute;background:#0b1224;border:1px solid #28407a;border-radius:8px;padding:.4rem .6rem;font-size:.9rem;pointer-events:none;white-space:nowrap;transform:translate(-50%,-120%);box-shadow:0 6px 18px rgba(0,0,0,.25)}
.tooltip strong{color:#c7d2fe}

@media (max-width: 900px){
  canvas#chart{height:58vh}
}
@media (max-width: 640px){
  canvas#chart{height:52vh}
}