:root{
  --navy:#0f2740; --teal:#0f9b8e; --teal-dark:#0b7a70;
  --amber:#e0862b; --rose:#c94f6d; --ink:#1c2b36;
  --card:#ffffff; --line:#e4e0d6;
}
*{box-sizing:border-box;}
body{
  margin:0; font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif;
  background:linear-gradient(180deg,#f4f1e8 0%,#fbfaf6 220px);
  color:var(--ink); padding:28px 20px 40px; overscroll-behavior-y:contain;
}
.wrap{max-width:1080px;margin:0 auto;}
header{
  background:linear-gradient(120deg,var(--navy) 0%,#163a5e 55%,var(--teal-dark) 100%);
  border-radius:18px; padding:26px 32px; color:#fff;
  box-shadow:0 10px 30px rgba(15,39,64,0.25); position:relative; overflow:hidden;
}
header::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  background:radial-gradient(circle,rgba(255,255,255,0.14) 0%,transparent 70%);}
header h1{margin:0 0 4px;font-size:26px;font-weight:700;}
header p{margin:0;font-size:14px;color:#cfe3e0;max-width:640px;}
.badge-row{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap;}
.badge{background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.25);
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:600;}
.card{background:var(--card);border-radius:18px;box-shadow:0 8px 24px rgba(15,39,64,0.08);
  margin-top:22px;padding:20px 22px 14px;border:1px solid var(--line);}
.chart-shell{display:grid;grid-template-columns:minmax(0,1fr) 58px;gap:14px;align-items:stretch;}
.chart-frame{overflow:hidden;}
.y-control{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:8px 0;overscroll-behavior:contain;touch-action:none;}
.y-control label{font-weight:700;font-size:12px;color:var(--navy);writing-mode:vertical-rl;transform:rotate(180deg);}
.y-value{font-size:15px;font-weight:800;color:var(--teal-dark);background:#fff;border:1px solid var(--line);border-radius:9px;padding:5px 7px;line-height:1;}
.y-control input[type=range]{accent-color:var(--teal);width:340px;transform:rotate(-90deg);touch-action:none;-webkit-user-select:none;user-select:none;}
.lookup{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:18px 24px;
  background:var(--card);border-radius:18px;margin-top:22px;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(15,39,64,0.08);}
.lookup label{font-weight:700;font-size:14px;color:var(--navy);}
.lookup input[type=range]{accent-color:var(--teal);flex:1;min-width:180px;order:1;width:100%;}
.ga-value{font-size:22px;font-weight:800;color:var(--teal-dark);min-width:96px;}
#result{width:100%;order:2;}
.centile-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border-radius:12px;border:1px solid var(--line);background:#fbfaf6;}
.centile-table caption{caption-side:top;text-align:left;font-size:12px;font-weight:800;color:var(--navy);padding:0 0 7px;}
.centile-table th,.centile-table td{padding:8px 10px;text-align:center;font-size:13px;border-right:1px solid var(--line);}
.centile-table th:last-child,.centile-table td:last-child{border-right:0;}
.centile-table th{color:#fff;font-weight:800;}
.centile-table td{color:var(--ink);font-weight:800;background:#fff;}
svg{width:100%;height:auto;display:block;}
.legend-note{display:flex;gap:18px;flex-wrap:wrap;font-size:12.5px;color:#5a6b74;padding:12px 6px 6px;}
.legend-note span{display:flex;align-items:center;gap:6px;}
.swatch{width:14px;height:4px;border-radius:2px;display:inline-block;}
footer{text-align:center;font-size:11.5px;color:#8b968c;margin-top:18px;line-height:1.6;}
@media (max-width:600px){
  .lookup input[type=range]{flex-basis:100%;}
}
@media (max-width:640px){
  body{padding:18px 10px 28px;}
  header{padding:22px 20px;}
  .card{padding:14px 10px 12px;}
  .chart-shell{grid-template-columns:minmax(0,1fr) 46px;gap:8px;}
  .y-control input[type=range]{width:260px;}
  .centile-table{min-width:var(--table-min-width,640px);}
  #result{overflow-x:auto;}
}
@media print{
  body{background:#fff;padding:0;-webkit-print-color-adjust:exact;print-color-adjust:exact;}
  .wrap{max-width:100%;}
  header{box-shadow:none;background:var(--navy);border-radius:0;}
  .card,.lookup{box-shadow:none;border:1px solid #ccc;}
  .lookup{display:none;}
  svg{width:100%;}
  @page{size:landscape;margin:12mm;}
}