/* Parent-header tile and shine treatment adapted from Aaron Iker's Card hover effect.
   https://codepen.io/aaroniker/pen/yLEPJXj
   Copyright (c) 2026 Aaron Iker. MIT license: card-hover-LICENSE.txt. */
#experience .timeline-entry:nth-child(1) { --role-accent: #9b83ed; --role-tile-cycle: 8s; }
#experience .timeline-entry:nth-child(2) { --role-accent: #e48594; --role-tile-cycle: 9s; }
#experience .timeline-entry:nth-child(3) { --role-accent: #69b8d1; --role-tile-cycle: 8.5s; }
#experience .timeline-entry:nth-child(4) { --role-accent: #d3ad71; --role-tile-cycle: 10s; }
#experience .timeline-entry:nth-child(5) { --role-accent: #729dea; --role-tile-cycle: 9.5s; }
#experience .timeline-entry:nth-child(6) { --role-accent: #79bdaa; --role-tile-cycle: 8.8s; }

/* The outer shell stays quiet; only the parent heading receives the new effect. */
#experience .timeline-card:is(:hover, :focus-within) {
  border-color: var(--border-strong);
  box-shadow: none;
  transform: none;
}
#experience .timeline-card-heading {
  --card-accent: var(--role-accent);
  --tile-ink: color-mix(in srgb, var(--role-accent) 8%, transparent);
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-color: var(--border-strong);
  background: var(--surface-1);
  box-shadow: inset 2px 0 0 color-mix(in srgb, var(--role-accent) 45%, transparent);
  transition: border-color .3s ease, box-shadow .3s ease;
}
#experience .timeline-card-heading > :not(.digital-tiles) { position: relative; z-index: 2; }
#experience .timeline-card-heading .timeline-kind {
  color: color-mix(in srgb, var(--role-accent) 65%, var(--text-1));
}
#experience .timeline-card-heading::before,
#experience .timeline-card-heading::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
  transition: opacity .45s ease;
}
/* Keep the employer heading neutral; the tile pattern is the only hover color. */
#experience .timeline-card-heading::before {
  display: none;
}
#experience .timeline-card-heading::after {
  background-image:
    linear-gradient(color-mix(in srgb, var(--role-accent) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--role-accent) 8%, transparent) 1px, transparent 1px);
  background-size: 38px 38px;
  background-position: right top;
  mask-image: radial-gradient(ellipse at 90% 0%, #000, transparent 68%);
  opacity: 0;
}
#experience .timeline-card-heading .digital-tiles {
  position: absolute;
  top: 0;
  right: 0;
  width: min(228px, 68%);
  height: 152px;
  z-index: 1;
  pointer-events: none;
  mask-image: linear-gradient(135deg, transparent 0%, #000 85%);
  opacity: 0;
  transition: opacity .45s ease;
}
#experience .timeline-card-heading .digital-tiles > span {
  width: 38px;
  height: 38px;
  right: calc(var(--tile-column, 0) * 38px);
  top: calc(var(--tile-row, 0) * 38px);
  background: var(--tile-ink);
  opacity: 0;
  animation-delay: var(--tile-delay, 0s);
}
#experience .timeline-card-heading .digital-tiles > span:nth-child(2n) { --tile-delay: -2s; }
#experience .timeline-card-heading .digital-tiles > span:nth-child(3n) { --tile-delay: -4s; }
#experience .timeline-card-heading .digital-tiles > span:nth-child(4n) { --tile-delay: -6s; }

/* Each parent has a different set of illuminated grid cells. */
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 0; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(2) { --tile-column: 1; --tile-row: 0; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(3) { --tile-column: 1; --tile-row: 1; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(4) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(5) { --tile-column: 3; --tile-row: 1; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(6) { --tile-column: 2; --tile-row: 2; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(7) { --tile-column: 3; --tile-row: 2; }
#experience [data-tile-pattern="1"] > .digital-tiles > span:nth-child(8) { --tile-column: 4; --tile-row: 2; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 0; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(2) { --tile-column: 0; --tile-row: 1; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(3) { --tile-column: 0; --tile-row: 2; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(4) { --tile-column: 1; --tile-row: 1; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(5) { --tile-column: 1; --tile-row: 2; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(6) { --tile-column: 2; --tile-row: 0; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(7) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="2"] > .digital-tiles > span:nth-child(8) { --tile-column: 3; --tile-row: 2; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 0; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(2) { --tile-column: 1; --tile-row: 0; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(3) { --tile-column: 0; --tile-row: 1; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(4) { --tile-column: 1; --tile-row: 1; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(5) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(6) { --tile-column: 0; --tile-row: 2; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(7) { --tile-column: 1; --tile-row: 2; }
#experience [data-tile-pattern="3"] > .digital-tiles > span:nth-child(8) { --tile-column: 2; --tile-row: 2; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 1; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(2) { --tile-column: 1; --tile-row: 1; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(3) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(4) { --tile-column: 3; --tile-row: 1; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(5) { --tile-column: 1; --tile-row: 0; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(6) { --tile-column: 3; --tile-row: 0; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(7) { --tile-column: 0; --tile-row: 2; }
#experience [data-tile-pattern="4"] > .digital-tiles > span:nth-child(8) { --tile-column: 2; --tile-row: 2; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 0; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(2) { --tile-column: 1; --tile-row: 1; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(3) { --tile-column: 2; --tile-row: 2; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(4) { --tile-column: 3; --tile-row: 3; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(5) { --tile-column: 1; --tile-row: 0; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(6) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(7) { --tile-column: 3; --tile-row: 2; }
#experience [data-tile-pattern="5"] > .digital-tiles > span:nth-child(8) { --tile-column: 4; --tile-row: 3; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(1) { --tile-column: 0; --tile-row: 0; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(2) { --tile-column: 1; --tile-row: 0; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(3) { --tile-column: 2; --tile-row: 0; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(4) { --tile-column: 2; --tile-row: 1; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(5) { --tile-column: 2; --tile-row: 2; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(6) { --tile-column: 1; --tile-row: 2; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(7) { --tile-column: 0; --tile-row: 2; }
#experience [data-tile-pattern="6"] > .digital-tiles > span:nth-child(8) { --tile-column: 3; --tile-row: 1; }

#experience .timeline-card-heading:hover,
#experience .timeline-card:focus-within .timeline-card-heading {
  border-color: color-mix(in srgb, var(--role-accent) 30%, var(--border-strong));
  box-shadow: inset 2px 0 0 color-mix(in srgb, var(--role-accent) 70%, transparent);
}
#experience .timeline-card-heading:hover::before,
#experience .timeline-card:focus-within .timeline-card-heading::before { opacity: 1 !important; }
#experience .timeline-card-heading:hover::after,
#experience .timeline-card:focus-within .timeline-card-heading::after,
#experience .timeline-card-heading:hover .digital-tiles,
#experience .timeline-card:focus-within .timeline-card-heading .digital-tiles { opacity: 1; }
#experience .timeline-card-heading:hover .digital-tiles > span,
#experience .timeline-card:focus-within .timeline-card-heading .digital-tiles > span {
  animation-name: card-tile;
  animation-duration: var(--role-tile-cycle);
  animation-iteration-count: infinite;
}
#experience .timeline-entry.is-current .timeline-icon {
  color: var(--role-accent);
  border-color: color-mix(in srgb, var(--role-accent) 65%, var(--border));
  background: color-mix(in srgb, var(--surface-1) 89%, var(--role-accent));
}
/* Timeline glyphs follow their marker color, including the legacy orange code icon. */
#experience .timeline-icon > i { color: inherit !important; animation: none; }
[data-theme="light"] #experience .timeline-card-heading {
  --tile-ink: color-mix(in srgb, var(--role-accent) 8%, transparent);
  background: var(--surface-1);
}
[data-theme="light"] #experience .timeline-card-heading .timeline-kind {
  color: color-mix(in srgb, var(--role-accent) 35%, var(--text-0));
}
@media (prefers-reduced-motion: reduce) {
  #experience .timeline-card-heading,
  #experience .timeline-card-heading::before,
  #experience .timeline-card-heading::after,
  #experience .timeline-card-heading .digital-tiles { transition: none; }
  #experience .timeline-card-heading:hover .digital-tiles > span,
  #experience .timeline-card:focus-within .timeline-card-heading .digital-tiles > span {
    animation: none;
    opacity: .55;
  }
}