/* Reading tools, not page choreography. The synthetic waves remain the focal motion. */
:root{
  --control-radius:6px;
  --control-border:#7e958b;
  --feedback-time:140ms;
  --state-time:240ms;
  --arrive:cubic-bezier(.16,1,.3,1);
}
html{scrollbar-gutter:stable}
.btn,.menu-toggle,#wave-toggle,.viewer-button{
  min-height:44px;border-radius:var(--control-radius);border-color:var(--control-border);font-size:13px;font-weight:600;
  transition:background-color var(--feedback-time) ease,border-color var(--feedback-time) ease,color var(--feedback-time) ease;
}
.btn{padding:12px 18px;line-height:1.5}
.btn-primary{border-color:var(--accent)}
.btn-ghost,#wave-toggle{background:var(--surface);border-color:var(--control-border)}
.btn-ghost:hover,#wave-toggle:hover{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.btn:active,.viewer-button:active,#wave-toggle:active,.menu-toggle:active{background-color:var(--accent-soft);transform:translateY(1px)}
.btn-primary:active{background-color:#093d33;color:white}
.btn:disabled,.viewer-button:disabled{opacity:.5;cursor:not-allowed;transform:none}
.control-icon{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.btn-primary .control-icon{transition:transform var(--feedback-time) var(--arrive)}
.primary-nav a{position:relative;transition:color var(--feedback-time) ease}
.primary-nav a::after{
  content:'';position:absolute;inset:auto 0 0;height:3px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform 180ms var(--arrive);
}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{border-bottom-color:transparent}
.primary-nav a[aria-current="page"]::after{transform:scaleX(1)}
.contents a{transition:background-color var(--feedback-time) ease,color var(--feedback-time) ease,border-color var(--feedback-time) ease}
.reading-next a{transition:color var(--feedback-time) ease}
.reading-next svg{transition:transform 180ms var(--arrive)}
.image-link,.lab-image{outline:1px solid transparent;outline-offset:3px;transition:outline-color var(--feedback-time) ease}
.image-link:hover,.lab-image:hover{outline-color:#97b8aa}
.image-link:focus-visible,.lab-image:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.results-table tbody td{transition:background-color var(--feedback-time) ease}
.results-table tbody tr:focus-within td{background:var(--accent-soft)}
#wave-toggle{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-width:133px}
#wave-toggle::before{
  content:'';width:13px;height:14px;flex:none;background:currentColor;
  clip-path:polygon(14% 0,100% 50%,14% 100%);
}
#wave-toggle[data-wave-state="playing"]::before{clip-path:polygon(10% 0,36% 0,36% 100%,10% 100%,10% 0,64% 0,90% 0,90% 100%,64% 100%,64% 0)}

/* Native summary activation, search and fragment opening remain intact. */
.technical-details{transition:border-color var(--feedback-time) ease}
.technical-details:focus-within{border-color:var(--accent)}
.technical-details.is-enhanced>summary,.explanation.is-enhanced>summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:48px;
  list-style:none;color:var(--ink);transition:color var(--feedback-time) ease;
}
.technical-details.is-enhanced>summary{margin:0;background:none;border:0}
.is-enhanced>summary::-webkit-details-marker{display:none}
.technical-details.is-enhanced>summary::before{display:none}
.technical-details.is-enhanced>summary:hover,.explanation.is-enhanced>summary:hover{color:var(--accent)}
.disclosure-icon{margin-left:auto;color:var(--accent);flex:none}
.disclosure-icon .vertical{transform-origin:12px 12px;transition:transform var(--state-time) var(--arrive),opacity var(--feedback-time) ease}
.is-expanded>summary .disclosure-icon .vertical{transform:rotate(90deg);opacity:0}
.is-enhanced>.disclosure-body{display:grid;grid-template-rows:0fr;margin:0!important;transition:grid-template-rows var(--state-time) var(--arrive)}
.is-enhanced.is-expanded>.disclosure-body{grid-template-rows:1fr}
.disclosure-inner{min-height:0;overflow:hidden;display:flow-root}
.technical-details>.disclosure-body>.disclosure-inner>:first-child{margin-top:18px}
.technical-details>.disclosure-body>.disclosure-inner>:last-child{margin-bottom:22px}
.explanation>.disclosure-body>.disclosure-inner>:first-child{margin-top:8px}
.explanation>.disclosure-body>.disclosure-inner>:last-child{margin-bottom:12px}
.is-enhanced.is-instant>.disclosure-body{transition:none}

/* A focused workspace for inspecting an unchanged source figure. */
body.figure-viewing{overflow:hidden}
.figure-viewer{
  width:min(1320px,calc(100vw - 64px));height:min(900px,calc(100dvh - 64px));
  max-width:none;max-height:none;margin:auto;padding:0;border:1px solid var(--line);
  border-radius:8px;background:var(--bg);color:var(--ink);box-shadow:none;
}
.figure-viewer[open]{display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;animation:viewer-arrive 180ms var(--arrive)}
.figure-viewer::backdrop{background:rgb(15 33 42 / .6)}
.viewer-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 22px}
.viewer-heading h2{font:600 17px/1.5 var(--body);letter-spacing:-.01em;margin:0;max-width:72ch}
.viewer-tools{display:flex;align-items:center;flex-wrap:wrap;gap:10px 24px;padding:0 22px 16px;border-bottom:1px solid var(--line)}
.viewer-tools>a{font-size:13px}
.viewer-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 14px;border:1px solid var(--control-border);background:var(--surface);color:var(--ink);font-family:var(--body);cursor:pointer}
.viewer-button:hover,.viewer-button[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.viewer-close{flex:none;width:44px;padding:0}
.viewer-stage{position:relative;display:flex;min-width:0;min-height:0;overflow:auto;overscroll-behavior:contain;background:var(--surface-2);scrollbar-color:#91aba0 var(--surface-2);outline-offset:-4px}
.viewer-image{flex:none;display:block;max-width:100%;max-height:100%;width:auto;height:auto;margin:auto;object-fit:contain}
.viewer-stage.is-actual .viewer-image{max-width:none;max-height:none;width:var(--source-width);height:var(--source-height);margin:0}
.viewer-status{align-self:center;text-align:center;font-size:14px;margin:auto;padding:24px;max-width:60ch}
.viewer-status[hidden],.viewer-image[hidden]{display:none}
.viewer-context{max-height:25dvh;overflow:auto;padding:12px 22px 16px;border-top:1px solid var(--line)}
.viewer-context>p{font-size:12px;line-height:1.7;color:var(--ink-2);margin:0}
.viewer-context details{margin-top:8px}
.viewer-context summary{cursor:pointer;color:var(--accent);font-size:13px;min-height:32px;padding:6px 0}
.viewer-context details p{font-size:13px;line-height:1.75;max-width:85ch;margin-top:10px}
@keyframes viewer-arrive{from{opacity:0;clip-path:inset(6px 0 6px round 8px)}to{opacity:1;clip-path:inset(0 round 8px)}}

@media(hover:hover) and (pointer:fine){
  .primary-nav a:hover::after{transform:scaleX(1)}
  .btn-primary:hover .control-icon,.reading-next a:hover svg{transform:translateX(3px)}
  .results-table tbody tr:hover td{background:var(--accent-soft)}
}
@media(max-width:1240px){.btn{padding-inline:14px}}
@media(max-width:950px){
  .menu-toggle{display:flex;align-items:center;justify-content:center;gap:10px;min-width:96px}
  .menu-glyph{position:relative;display:block;width:15px;height:14px;color:var(--ink)}
  .menu-glyph::before,.menu-glyph::after{content:'';position:absolute;left:0;top:3px;width:15px;height:1.5px;background:currentColor;transition:transform 180ms var(--arrive),top 180ms var(--arrive)}
  .menu-glyph::after{top:10px}
  .menu-toggle[aria-expanded="true"] .menu-glyph::before{top:6px;transform:rotate(45deg)}
  .menu-toggle[aria-expanded="true"] .menu-glyph::after{top:6px;transform:rotate(-45deg)}
  .primary-nav.is-open{animation:nav-arrive 220ms var(--arrive)}
  .primary-nav.is-closing{display:block;pointer-events:none;animation:nav-depart 140ms ease-in forwards}
  .primary-nav .site-wrap{border-top:1px solid var(--line)}
  .primary-nav a{padding:12px 8px;border-bottom:0;border-radius:4px}
  .primary-nav a::after{display:none}
  .primary-nav a[aria-current="page"]{background:var(--accent-soft)}
  @keyframes nav-arrive{from{clip-path:inset(0 0 100%)}to{clip-path:inset(0)}}
  @keyframes nav-depart{from{clip-path:inset(0)}to{clip-path:inset(0 0 100%)}}
}
@media(max-width:680px){
  .btn{font-size:13px}
  .signal-panel>.signal-panel-heading{flex-wrap:wrap;gap:12px 20px}
  .figure-viewer{width:calc(100vw - 16px);height:calc(100dvh - 24px);border-radius:6px}
  .figure-viewer:not(:has(.is-actual)){height:fit-content;max-height:calc(100dvh - 24px);grid-template-rows:auto auto auto auto}
  .viewer-stage:not(.is-actual){min-height:180px;max-height:calc(100dvh - 320px);aspect-ratio:var(--figure-ratio,3 / 2)}
  .viewer-heading{gap:12px;padding:12px 14px}
  .viewer-heading h2{font-size:15px}
  .viewer-tools{gap:8px 16px;padding:0 14px 12px}
  .viewer-tools>a{font-size:12px}
  .viewer-context{padding:10px 14px 12px}
  .viewer-button{font-size:12px}
  .viewer-context>p{font-size:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn,.menu-toggle,#wave-toggle,.viewer-button,.primary-nav a,.primary-nav a::after,.contents a,
  .reading-next a,.reading-next svg,.btn-primary .control-icon,.image-link,.lab-image,.results-table tbody td,
  .technical-details,.is-enhanced>summary,.disclosure-icon .vertical,.is-enhanced>.disclosure-body,
  .menu-glyph::before,.menu-glyph::after{transition:none}
  .figure-viewer[open],.primary-nav.is-open,.primary-nav.is-closing{animation:none}
  .btn:active,.viewer-button:active,#wave-toggle:active,.menu-toggle:active,
  .btn-primary:hover .control-icon,.reading-next a:hover svg{transform:none}
}