/* DGU v1.9: foundation-coloured feedback for elements with a real action.
   Include after discovery.css and media.css. Text is never faded.
   JS marks actionable wrappers .interactive-surface and may set --glow-rgb. */
:root {
  --glow-rgb: 34, 211, 238;
  --interaction-time: 210ms;
}
.foundation-governance { --glow-rgb: 74, 222, 128; }
.foundation-quality { --glow-rgb: 248, 113, 113; }
.foundation-operations { --glow-rgb: 250, 204, 21; }
.foundation-protection { --glow-rgb: 156, 163, 175; }

/* The logo keeps its approved artwork and dimensions. Warm yellow light
   follows its silhouette without enlarging the image or shifting the header. */
.site-header .brand {
  --brand-glow: drop-shadow(0 0 5px rgba(250, 204, 21, .58))
    drop-shadow(0 0 15px rgba(250, 204, 21, .34));
  border-radius: 7px;
}
.site-header .brand-logo {
  transition: filter var(--interaction-time) ease;
}
.site-header .brand:is(:focus-visible, :active) {
  outline-color: #facc15;
}
.site-header .brand:is(:focus-visible, :active) .brand-logo {
  filter: var(--brand-glow);
}

/* No new borders, dimensions or click handlers: existing layout and actions
   remain intact. A wrapper containing a link keeps its normal cursor. */
.interactive-surface,
.linked-card,
.media-thumbnail,
.button,
.section-nav a,
.search-result,
.nav-submenu-toggle,
.media-viewer-controls button,
.search-close,
.video-start {
  transition: border-color var(--interaction-time) ease,
    box-shadow var(--interaction-time) ease,
    background-color var(--interaction-time) ease,
    color var(--interaction-time) ease,
    transform var(--interaction-time) ease;
}
.interactive-surface,
.linked-card,
.media-thumbnail,
.button,
.section-nav a,
.search-result,
.media-viewer-controls button,
.search-close,
.video-start {
  --interaction-shadow: 0 0 0 1px rgba(var(--glow-rgb), .24),
    0 0 16px rgba(var(--glow-rgb), .28),
    0 0 34px rgba(var(--glow-rgb), .22),
    inset 0 0 18px rgba(var(--glow-rgb), .055);
}

/* Keyboard users get the same colour and glow as pointer users, together
   with the existing visible focus outline on the actual link/button. */
.interactive-surface:focus-within,
.linked-card:focus-within,
.media-thumbnail:focus-visible,
.button:focus-visible,
.section-nav a:focus-visible,
.search-result:focus-visible,
.media-viewer-controls button:focus-visible,
.search-close:focus-visible,
.video-start:focus-visible {
  border-color: rgb(var(--glow-rgb));
  box-shadow: var(--interaction-shadow);
}
.interactive-surface:focus-within,
.linked-card:focus-within {
  background-color: rgb(var(--dgu-color-080e19,8 14 25));
}
.card-topic-link:focus-visible::after {
  outline-color: rgb(var(--glow-rgb));
}
.media-thumbnail img {
  /* Image enlargement is intentionally disabled, including hover/focus. */
  transform: none;
  transition: none;
}
.media-enlarge {
  transition: border-color var(--interaction-time) ease,
    background-color var(--interaction-time) ease,
    box-shadow var(--interaction-time) ease;
}
.media-thumbnail:focus-visible .media-enlarge {
  border-color: rgb(var(--glow-rgb));
  background-color: rgb(var(--dgu-color-080e19,8 14 25));
  box-shadow: 0 0 16px rgba(var(--glow-rgb), .2);
}
.card-link-arrow,
.text-link > .icon:last-child {
  transition: transform var(--interaction-time) ease;
}
.text-link,
.concept-link,
.media-actions a {
  transition: color var(--interaction-time) ease,
    text-shadow var(--interaction-time) ease;
}
.text-link:focus-visible,
.concept-link:focus-visible,
.media-actions a:focus-visible {
  text-shadow: 0 0 14px rgba(var(--glow-rgb), .4);
}

/* Keep every tab visible and preserve the current fixed dropdown position. */
.site-header .main-nav .nav-item-row,
.nav-submenu .subnav-link {
  --glow-rgb: 34, 211, 238;
  --nav-interaction-shadow: 0 0 0 1px rgba(var(--glow-rgb), .8),
    0 0 16px rgba(var(--glow-rgb), .28),
    0 0 34px rgba(var(--glow-rgb), .22),
    inset 0 0 18px rgba(var(--glow-rgb), .055);
  transition: background-color var(--interaction-time) ease,
    color var(--interaction-time) ease,
    box-shadow var(--interaction-time) ease;
}
.site-header .main-nav .nav-item-row {
  border-radius: 7px;
  background-color: rgb(var(--dgu-color-152339,21 35 57) / 0.18);
}
/* A label and its separate arrow share one glowing surface. Existing link
   and button focus outlines remain visible; neither hit area is changed. */
.site-header .main-nav .nav-item-row:is(:focus-within, :active) {
  background-color: rgb(var(--dgu-color-080e19,8 14 25));
  box-shadow: var(--nav-interaction-shadow);
}
.site-header .main-nav .nav-item-row:is(:focus-within, :active) > :is(.nav-link, .nav-submenu-toggle) {
  color: #fff;
  background-color: transparent;
}
.site-header .main-nav .nav-item-row > :is(.nav-link, .nav-submenu-toggle) {
  transition: background-color var(--interaction-time) ease,
    color var(--interaction-time) ease,
    border-color var(--interaction-time) ease;
}
.site-header .main-nav .nav-link:not(.contact-nav)::after {
  content: "";
  display: block;
  position: absolute;
  height: 2px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--cyan);
  box-shadow: 0 0 10px rgb(var(--dgu-color-22d3ee,34 211 238) / 0.38);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--interaction-time) ease;
}
.site-header .main-nav .nav-link:not(.contact-nav):is(.active, [aria-current="page"], :focus-visible)::after {
  transform: scaleX(1);
}
.nav-submenu:not([hidden]) {
  animation: dgu-submenu-enter 160ms ease-out both;
}
@keyframes dgu-submenu-enter {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.nav-submenu .subnav-link {
  position: relative;
}
.nav-submenu .subnav-link:is(:focus-visible, :active) {
  z-index: 1;
  background-color: rgb(var(--dgu-color-080e19,8 14 25));
  color: #fff;
  box-shadow: var(--nav-interaction-shadow);
}

/* Related-node feedback is informational, not a promise of an extra action.
   It uses only explicit relationships supplied by interactions.js. */
:is(.architecture, .connected-columns) :is(.card, .asset-node) {
  transition: border-color var(--interaction-time) ease,
    background-color var(--interaction-time) ease,
    box-shadow var(--interaction-time) ease,
    transform var(--interaction-time) ease;
}
:is(.architecture, .connected-columns) .is-related {
  border-color: rgba(var(--glow-rgb), .85);
  box-shadow: 0 0 0 1px rgba(var(--glow-rgb), .16),
    0 0 16px rgba(var(--glow-rgb), .2),
    0 0 30px rgba(var(--glow-rgb), .13);
}
:is(.architecture, .connected-columns) .is-related-source {
  border-color: rgb(var(--glow-rgb));
  background-color: rgb(var(--dgu-color-080e19,8 14 25));
  box-shadow: 0 0 0 1px rgba(var(--glow-rgb), .24),
    0 0 16px rgba(var(--glow-rgb), .28),
    0 0 34px rgba(var(--glow-rgb), .22),
    inset 0 0 18px rgba(var(--glow-rgb), .055);
}

@media (hover: hover) and (pointer: fine) {
  .site-header .brand:hover .brand-logo {
    filter: var(--brand-glow);
  }
  .interactive-surface:hover,
  .linked-card:hover,
  .media-thumbnail:hover,
  .button:hover,
  .section-nav a:hover,
  .search-result:hover,
  .media-viewer-controls button:hover,
  .search-close:hover,
  .video-start:hover {
    border-color: rgb(var(--glow-rgb));
    box-shadow: var(--interaction-shadow);
  }
  .interactive-surface:hover,
  .linked-card:hover {
    background-color: rgb(var(--dgu-color-080e19,8 14 25));
    transform: translateY(-3px);
  }
  .button:hover { transform: translateY(-2px); }
  .media-thumbnail:hover .media-enlarge {
    border-color: rgb(var(--glow-rgb));
    background-color: rgb(var(--dgu-color-080e19,8 14 25));
    box-shadow: 0 0 16px rgba(var(--glow-rgb), .2);
  }
  .linked-card:hover .card-link-arrow,
  .text-link:hover > .icon:last-child { transform: translateX(3px); }
  .text-link:hover,
  .concept-link:hover,
  .media-actions a:hover { text-shadow: 0 0 14px rgba(var(--glow-rgb), .4); }
  .site-header .main-nav .nav-link:not(.contact-nav):hover::after {
    transform: scaleX(1);
  }
  .site-header .main-nav .nav-item-row:hover {
    background-color: rgb(var(--dgu-color-080e19,8 14 25));
    box-shadow: var(--nav-interaction-shadow);
  }
  .site-header .main-nav .nav-item-row:hover > :is(.nav-link, .nav-submenu-toggle) {
    color: #fff;
    background-color: transparent;
  }
  .nav-submenu .subnav-link:hover {
    z-index: 1;
    background-color: rgb(var(--dgu-color-080e19,8 14 25));
    color: #fff;
    box-shadow: var(--nav-interaction-shadow);
  }
}

/* Press feedback works on touch without a sticky hover or an extra tap.
   The media action label is always visible, including on touch devices. */
.interactive-surface:active,
.linked-card:active,
.media-thumbnail:active,
.button:active,
.section-nav a:active,
.search-result:active {
  border-color: rgb(var(--glow-rgb));
  box-shadow: var(--interaction-shadow);
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .site-header .brand-logo,
  .interactive-surface,
  .linked-card,
  .media-thumbnail,
  .media-thumbnail img,
  .media-enlarge,
  .button,
  .section-nav a,
  .search-result,
  .nav-submenu-toggle,
  .media-viewer-controls button,
  .search-close,
  .video-start,
  .card-link-arrow,
  .text-link,
  .text-link > .icon:last-child,
  .concept-link,
  .media-actions a,
  .site-header .main-nav .nav-item-row,
  .site-header .main-nav .nav-item-row > :is(.nav-link, .nav-submenu-toggle),
  .site-header .main-nav .nav-link::after,
  .nav-submenu,
  .nav-submenu .subnav-link,
  :is(.architecture, .connected-columns) :is(.card, .asset-node) {
    animation: none !important;
    transition: none !important;
  }
  .interactive-surface,
  .linked-card,
  .media-thumbnail img,
  .button,
  .card-link-arrow,
  .text-link > .icon:last-child,
  .nav-submenu { transform: none !important; }
}

@media print {
  .site-header .brand-logo { filter: none !important; }
  .interactive-surface,
  .linked-card,
  .media-thumbnail,
  .button,
  .section-nav a,
  .search-result,
  .site-header .main-nav .nav-item-row,
  .nav-submenu .subnav-link,
  :is(.architecture, .connected-columns) :is(.is-related, .is-related-source) {
    box-shadow: none !important;
    transform: none !important;
    background-color: #fff !important;
    border-color: #aaa !important;
  }
  .text-link,
  .concept-link,
  .media-actions a { text-shadow: none !important; }
  .media-thumbnail img { transform: none !important; }
}