/* Printed edges and quiet, tactile feedback. No decorative direction symbols. */
:root {
  --finish-ease: cubic-bezier(.2, .75, .25, 1);
  --finish-duration: 280ms;
}

/* The label stays registered while a second ink impression passes underneath. */
.btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: 0;
  transform: none;
  box-shadow: none;
  transition: color 220ms ease, background-color 220ms ease,
    border-color 220ms ease, transform 160ms var(--finish-ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  height: auto;
  background: currentColor;
  opacity: .09;
  transform: translate3d(-103%, 0, 0);
  transform-origin: left;
  transition: transform var(--finish-duration) var(--finish-ease);
  pointer-events: none;
  z-index: -1;
}
.btn::after {
  content: "";
  position: absolute;
  inset: 4px;
  width: auto;
  height: auto;
  border: 1px solid currentColor;
  background: none;
  clip-path: none;
  opacity: 0;
  transform: none;
  transition: opacity 220ms ease;
  pointer-events: none;
}
.btn:active:not(:disabled):not([aria-disabled="true"]) {
  transform: scale(.985);
}

/* Links have a continuous reading edge instead of an ornamental arrow. */
:is(.textlink, .related-links a, .catalog-card-more, .download-row a:not(.btn)) {
  position: relative;
  display: inline-block;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, currentColor 38%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 6px;
}
:is(.textlink, .related-links a, .catalog-card-more, .download-row a:not(.btn))::before {
  content: "";
  position: absolute;
  inset: auto 0 1px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--finish-duration) var(--finish-ease);
  pointer-events: none;
}
.textlink::after {
  content: none;
}
.catalog-card-more span {
  transform: none;
}

/* Product photographs behave like a specimen held inside a fixed mount. */
:is(.product-card, .catalog-card, .guide-entry, .tool-grid article) {
  transform: none;
  box-shadow: none;
  transition: none;
}
:is(.product-image, .catalog-card-photo) {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
:is(.product-image, .catalog-card-photo)::after {
  content: "";
  position: absolute;
  inset: 9px;
  z-index: 2;
  border: 1px solid #173d3233;
  opacity: 0;
  transform: scale(.985);
  transition: opacity var(--finish-duration) ease,
    transform var(--finish-duration) var(--finish-ease);
  pointer-events: none;
}
:is(.product-image, .catalog-card-photo) img {
  transform: none;
  transition: transform 340ms var(--finish-ease), opacity 280ms ease;
}
/* Two product photographs must never merge into one apparent product.
   Visibility switches both layers in one frame; only the image framing moves. */
.catalog-card-photo img {
  mix-blend-mode: normal;
  background: inherit;
  transition: transform 340ms var(--finish-ease);
}
.catalog-card-photo > .catalog-card-alternate {
  visibility: hidden;
  opacity: 1;
}
.catalog-card-photo:has(> .catalog-card-alternate):focus-visible > img:first-child {
  visibility: hidden;
}
.catalog-card-photo:focus-visible > .catalog-card-alternate {
  visibility: visible;
}
.guide-entry img {
  transition: transform var(--finish-duration) var(--finish-ease);
}
.tool-grid article {
  position: relative;
}
.tool-grid article::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto;
  height: 1px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--finish-duration) var(--finish-ease);
  pointer-events: none;
}
.application-links > a {
  position: relative;
  isolation: isolate;
}
.application-links > a::before {
  content: "";
  position: absolute;
  inset: 0 -15px;
  z-index: -1;
  background: var(--soft);
  opacity: 0;
  transform: scaleX(.985);
  transform-origin: left;
  transition: opacity var(--finish-duration) ease,
    transform var(--finish-duration) var(--finish-ease);
  pointer-events: none;
}

/* Native controls keep their familiar affordances and clear keyboard states. */
:is(.field input, .field select, .field textarea, .catalog-search input, .catalog-sort select) {
  border-radius: 0;
  transition: border-color 180ms ease, box-shadow 180ms ease,
    background-color 180ms ease;
}
:is(.field input, .field select, .field textarea, .catalog-search input, .catalog-sort select):focus {
  border-color: var(--brand);
  background-color: #fff;
  box-shadow: inset 3px 0 0 var(--brand);
}
:is(button, a, input, select, textarea, summary):focus-visible {
  outline: 2px solid var(--info);
  outline-offset: 5px;
}
.faq summary {
  transition: color 180ms ease;
}
.faq summary::after {
  transition: opacity 180ms ease;
}
.faq details[open] > div {
  animation: finish-disclosure 240ms var(--finish-ease) both;
}
@keyframes finish-disclosure {
  from { opacity: 0; transform: translate3d(0, -3px, 0); }
  to { opacity: 1; transform: none; }
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover:not(:disabled):not([aria-disabled="true"]) {
    transform: none;
    box-shadow: none;
  }
  .btn:hover:not(:disabled):not([aria-disabled="true"])::before {
    transform: translate3d(0, 0, 0);
  }
  .btn:hover:not(:disabled):not([aria-disabled="true"])::after {
    opacity: .32;
    transform: none;
  }
  .btn:active:not(:disabled):not([aria-disabled="true"]) {
    transform: scale(.985);
  }
  :is(.textlink, .related-links a, .catalog-card-more, .download-row a:not(.btn)):hover::before {
    transform: scaleX(1);
    transform-origin: left;
  }
  .catalog-card-more:hover span {
    transform: none;
  }
  :is(.product-card, .catalog-card, .guide-entry, .tool-grid article):hover {
    transform: none;
    box-shadow: none;
  }
  .product-card:hover .product-image img,
  .catalog-card-photo:hover > img:first-child {
    transform: scale(1.035);
  }
  .catalog-card-photo:has(> .catalog-card-alternate):hover > img:first-child {
    visibility: hidden;
  }
  .catalog-card-photo:hover > .catalog-card-alternate {
    visibility: visible;
    transform: scale(1.035);
  }
  .product-card:hover .product-image::after,
  .catalog-card-photo:hover::after {
    opacity: 1;
    transform: none;
  }
  .guide-entry:hover img {
    transform: scale(1.025);
  }
  .tool-grid article:hover::before {
    transform: scaleX(1);
    transform-origin: left;
  }
  .application-links > a:hover::before {
    opacity: 1;
    transform: none;
  }
  .faq summary:hover {
    color: var(--info);
  }
}

/* No sticky hover or image movement on touch devices. */
@media (hover: none), (pointer: coarse) {
  .btn:hover:not(:disabled):not([aria-disabled="true"]),
  .product-card:hover img,
  .catalog-card-photo:hover > img:first-child,
  :is(.product-card, .catalog-card, .guide-entry, .tool-grid article):hover {
    transform: none;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn, .btn::before, .btn::after,
  :is(.textlink, .related-links a, .catalog-card-more, .download-row a:not(.btn))::before,
  :is(.product-image, .catalog-card-photo)::after,
  :is(.product-image, .catalog-card-photo) img, .guide-entry img,
  .tool-grid article::before, .application-links > a::before,
  :is(.field input, .field select, .field textarea, .catalog-search input, .catalog-sort select),
  .faq summary, .faq summary::after {
    transition: none;
  }
  .faq details[open] > div {
    animation: none;
  }
  .btn:active:not(:disabled):not([aria-disabled="true"]),
  .product-card:hover .product-image img,
  .catalog-card-photo:hover > img:first-child,
  .catalog-card-photo:hover > .catalog-card-alternate,
  .guide-entry:hover img {
    transform: none;
  }
}