/* VPD controls, interpretation, and optional chart share one set of readings. */
#vpd-calculator{width:100%;margin:0 0 32px;color:var(--ink);font-family:var(--sans)}
#vpd-calculator [hidden]{display:none!important}
#vpd-calculator .ga-vpd-widget{overflow:visible;border:1px solid var(--line);background:var(--paper);box-shadow:none}
#vpd-calculator button,#vpd-calculator input{font:inherit;color:inherit}
#vpd-calculator button{cursor:pointer}
#vpd-calculator fieldset{min-width:0;border:0;padding:0;margin:0}
#vpd-calculator legend{font:.85rem/1.4 var(--mono);text-transform:none;letter-spacing:0;margin-bottom:8px}
#vpd-calculator .ga-vpd-controls{display:grid;grid-template-columns:1fr 1fr;gap:20px 32px;padding:24px;background:var(--paper-deep)}
#vpd-calculator .ga-vpd-stage-field{grid-column:1/-1}
#vpd-calculator .ga-vpd-stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}
#vpd-calculator .ga-vpd-stages label{position:relative;margin:0}
#vpd-calculator .ga-vpd-stages input{position:absolute;opacity:0;width:1px;height:1px}
#vpd-calculator .ga-vpd-stages span{display:grid;place-items:center;min-height:44px;padding:8px;border:1px solid var(--line);background:var(--paper);font:.9rem/1.2 var(--mono);text-align:center;cursor:pointer}
#vpd-calculator .ga-vpd-stages input:checked+span{background:var(--moss);color:var(--paper);border-color:var(--moss)}
#vpd-calculator .ga-vpd-stages input:focus-visible+span,#vpd-calculator button:focus-visible,#vpd-calculator input:focus-visible,#vpd-calculator summary:focus-visible{outline:3px solid var(--leaf);outline-offset:3px}
#vpd-calculator .ga-vpd-control{display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px 16px}
#vpd-calculator .ga-vpd-control>label{font-size:1rem}
#vpd-calculator .ga-vpd-number{display:flex;align-items:center;gap:6px;font:.9rem/1.3 var(--mono)}
#vpd-calculator .ga-vpd-number input{width:82px;min-height:44px;padding:6px;border:1px solid var(--line);border-radius:0;background:var(--paper);font-size:16px;text-align:center}
#vpd-calculator input[type=number]{-moz-appearance:textfield}
#vpd-calculator input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none}
#vpd-calculator .ga-vpd-slider-row{display:grid;grid-column:1/-1;grid-template-columns:44px minmax(0,1fr) 44px;gap:12px;align-items:center}
#vpd-calculator .ga-vpd-slider-row button{height:44px;border:1px solid var(--line);background:var(--paper);font-size:1.2rem}
#vpd-calculator input[type=range]{width:100%;min-width:0;min-height:44px;margin:0;accent-color:var(--moss);touch-action:pan-y}
#vpd-calculator .vpd-result{display:grid;grid-template-columns:1fr 1fr;gap:16px 32px;padding:24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper)}
#vpd-calculator .vpd-result p{margin:0;line-height:1.5}
#vpd-calculator .vpd-result h2{margin:0 0 8px;font:.85rem/1.3 var(--mono);color:var(--ink-soft)}
#vpd-calculator .vpd-result-main>p:first-of-type{color:var(--moss)}
#vpd-calculator [data-vpd-value]{font:400 3rem/1 var(--serif)}
#vpd-calculator [data-vpd-status]{margin-top:8px;font-size:.95rem}
#vpd-calculator .vpd-result[data-status=below] [data-vpd-status]{color:#215d82}
#vpd-calculator .vpd-result[data-status=above] [data-vpd-status]{color:#98452e}
#vpd-calculator .vpd-result-context{display:grid;gap:14px}
#vpd-calculator .vpd-result-context span{display:block;color:var(--ink-soft);font-size:.85rem}
#vpd-calculator .vpd-result-context strong{display:block;margin-top:4px;font:600 1.1rem/1.4 var(--mono)}
#vpd-calculator .vpd-leaf-summary{grid-column:1/-1;color:var(--ink-soft);font-size:.85rem}
#vpd-calculator details>summary{min-height:52px;padding:16px 24px;font:600 1rem/1.4 var(--mono);color:var(--moss);cursor:pointer}
#vpd-calculator .vpd-leaf-settings summary span{float:right;margin-left:12px;font-size:.8rem;font-weight:400;color:var(--ink-soft)}
#vpd-calculator .vpd-leaf-content{padding:0 24px 20px;max-width:720px}
#vpd-calculator .vpd-leaf-modes{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:20px}
#vpd-calculator .vpd-leaf-modes label{display:flex;align-items:center;gap:8px;min-height:44px;font-size:.95rem}
#vpd-calculator .vpd-leaf-modes input{width:20px;height:20px;accent-color:var(--moss)}
#vpd-calculator .vpd-field-help{grid-column:1/-1;font-size:.85rem;line-height:1.5;color:var(--ink-soft);margin:8px 0 12px}
#vpd-calculator .vpd-field-help a{text-decoration:underline}
#vpd-calculator .vpd-chart-details{border-top:1px solid var(--line)}
#vpd-calculator .ga-vpd-chart-panel{padding:0 24px 24px}
#vpd-calculator .ga-vpd-chart-tools{display:flex;align-items:center;justify-content:space-between;gap:16px}
#vpd-calculator .ga-vpd-legend{display:flex;gap:10px 18px;flex-wrap:wrap;font-size:.85rem}
#vpd-calculator .ga-vpd-legend span{display:flex;align-items:center;gap:6px}
#vpd-calculator .ga-vpd-legend i{width:12px;height:12px}
#vpd-calculator .ga-vpd-low{background:#a8d0eb}
#vpd-calculator .ga-vpd-target{background:#a7d5b7}
#vpd-calculator .ga-vpd-high{background:#e5b0a8}
#vpd-calculator .vpd-chart-toggle{min-height:44px;padding:10px 16px;border:1px solid var(--moss);background:var(--paper);font-size:.9rem}
#vpd-calculator .vpd-chart-toggle[aria-pressed=true]{background:var(--moss);color:var(--paper)}
#vpd-calculator .ga-vpd-chart-wrap{height:460px;border:1px solid var(--line)}
#vpd-calculator .ga-vpd-canvas{display:block;width:100%;height:100%;touch-action:pan-y;cursor:default}
#vpd-calculator .ga-vpd-canvas.is-adjusting{touch-action:none;cursor:crosshair}
#vpd-calculator .ga-vpd-notes{padding:16px 24px;border-top:1px solid var(--line);background:var(--paper-deep)}
#vpd-calculator .ga-vpd-notes p{margin:0;font-size:.85rem;line-height:1.5}
#vpd-calculator .vpd-mobile-result{display:none}
@media(max-width:880px){
  .ga-vpd-reference-page .tool-reference-hero{padding:16px 0 20px;gap:12px}
  .ga-vpd-reference-page .tool-reference-hero .back-link{margin-bottom:8px}
  .ga-vpd-reference-page .tool-reference-hero h1{font-size:2rem;margin:8px 0 0}
  #vpd-calculator{margin-bottom:100px}
  #vpd-calculator .ga-vpd-controls{gap:16px;padding:16px;grid-template-columns:1fr}
  #vpd-calculator .ga-vpd-stages{grid-template-columns:repeat(4,minmax(0,1fr))}
  #vpd-calculator .ga-vpd-stages span{font-size:.8rem;padding:8px 4px}
  #vpd-calculator .vpd-result{padding:18px 16px;gap:14px;grid-template-columns:1fr}
  #vpd-calculator .vpd-result-main{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 12px}
  #vpd-calculator .vpd-result h2{margin:0}
  #vpd-calculator .vpd-result-main>p:first-of-type{grid-column:2;grid-row:1/3}
  #vpd-calculator [data-vpd-value]{font-size:2.6rem}
  #vpd-calculator [data-vpd-status]{margin:0;font-size:.85rem}
  #vpd-calculator .vpd-result-context{grid-template-columns:1fr 1fr;gap:14px}
  #vpd-calculator .vpd-result-context strong{font-size:1rem}
  #vpd-calculator details>summary{padding:16px;font-size:.95rem}
  #vpd-calculator .vpd-leaf-content{padding:0 16px 16px}
  #vpd-calculator .vpd-leaf-settings summary span{font-size:.72rem}
  #vpd-calculator .ga-vpd-chart-panel{padding:0 12px 16px}
  #vpd-calculator .ga-vpd-chart-tools{align-items:stretch;flex-direction:column;gap:12px}
  #vpd-calculator .ga-vpd-chart-wrap{height:360px}
  #vpd-calculator .ga-vpd-notes{padding:16px}
  #vpd-calculator .vpd-mobile-result{position:fixed;bottom:0;left:0;right:0;z-index:15;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:4px 14px;padding:12px 16px max(12px,env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--paper);color:var(--moss);box-shadow:0 -4px 18px #17201a12}
  #vpd-calculator .vpd-mobile-result strong{grid-row:1/3;font:400 1.7rem/1 var(--serif)}
  #vpd-calculator .vpd-mobile-result span,#vpd-calculator .vpd-mobile-result small{text-align:right;font:.8rem/1.3 var(--mono)}
}
@media(max-width:360px){
  #vpd-calculator .ga-vpd-stages{grid-template-columns:repeat(2,minmax(0,1fr))}
  #vpd-calculator .vpd-leaf-settings summary span{float:none;display:block;margin:4px 0 0}
  #vpd-calculator .vpd-result-context{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){#vpd-calculator *{scroll-behavior:auto}}