/* ──────────────────────────────────────────────────────────────────────────
 * engine-cards.css — "Pick the engine for the job" harness picker.
 * Three click-to-expand engine cards + a side-by-side comparison table.
 * Built on Material CSS vars so light & dark both work with no extra rules.
 * Companion script: docs/javascripts/engine-cards.js
 * ────────────────────────────────────────────────────────────────────────── */

/* ---------- intro block ---------- */
.eng-head { margin: 1.4rem 0 .3rem; }
.eng-head .eng-eyebrow {
  display: block;
  color: var(--md-primary-fg-color);
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0 0 .35rem;
}
.eng-head .eng-lede {
  font-size: .92rem;
  color: var(--md-default-fg-color--light);
  margin: 0;
  max-width: none;
}

/* ---------- card grid ---------- */
.eng-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.2rem 0 1.8rem;
}
@media (max-width: 60rem) { .eng-grid { grid-template-columns: 1fr; } }

.eng-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: .8rem;
  padding: 1.15rem 1.15rem 1rem;
  box-shadow: 0 1px 2px rgba(20,30,50,.06), 0 6px 18px rgba(20,30,50,.06);
  transition: border-color .15s, transform .15s, box-shadow .15s;
  cursor: pointer;
}
.eng-card:hover {
  border-color: var(--md-primary-fg-color);
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(20,30,50,.06), 0 12px 28px rgba(63,81,181,.12);
}
.eng-card:focus-visible {
  outline: 2px solid var(--md-primary-fg-color);
  outline-offset: 3px;
}

/* featured card gets an indigo top accent bar (stays on-brand with the site) */
.eng-card--accent { border-top: 3px solid var(--md-primary-fg-color); }
.eng-card--accent .eng-flag {
  position: absolute;
  top: .85rem;
  right: .9rem;
  font-size: .55rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--md-primary-fg-color);
  background: color-mix(in srgb, var(--md-primary-fg-color) 12%, transparent);
  padding: 2px 7px;
  border-radius: 20px;
}

.eng-ico {
  width: 2.6rem;
  height: 2.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  line-height: 1;
  border-radius: .6rem;
  background: color-mix(in srgb, var(--md-primary-fg-color) 10%, var(--md-code-bg-color));
  border: 1px solid var(--md-default-fg-color--lightest);
  margin-bottom: .75rem;
}
.eng-kicker {
  font-size: .62rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--md-primary-fg-color);
  margin-bottom: .25rem;
}
.eng-name {
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--md-default-fg-color);
  margin: 0 0 .4rem;
}
.eng-desc {
  font-size: .82rem;
  color: var(--md-default-fg-color--light);
  line-height: 1.5;
  margin: 0 0 .85rem;
  flex: 1 1 auto;
}
.eng-toggle {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .8rem;
  font-weight: 700;
  color: var(--md-primary-fg-color);
  line-height: 1.3;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}
.eng-toggle .eng-caret { transition: transform .18s ease; display: inline-block; }
.eng-card.is-open .eng-toggle .eng-caret { transform: rotate(90deg); }
.eng-toggle:hover { text-decoration: underline; }

/* ---------- expandable detail panel ---------- */
.eng-detail {
  display: grid;
  grid-template-rows: 0fr;
  grid-template-columns: 100%;
  transition: grid-template-rows .22s ease;
  margin-top: 0;
}
.eng-card.is-open .eng-detail {
  grid-template-rows: 1fr;
  margin-top: .9rem;
}
.eng-detail-inner {
  overflow: hidden;
  min-width: 0;
  border-top: 1px dashed var(--md-default-fg-color--lightest);
  padding-top: .2rem;
}
.eng-detail dl {
  margin: .6rem 0 0;
  display: block;
}
.eng-detail dt {
  font-size: .6rem;
  font-weight: 800;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--lighter);
  margin-top: .6rem;
}
.eng-detail dt:first-of-type { margin-top: 0; }
.eng-detail dd {
  margin: .12rem 0 0;
  font-size: .8rem;
  line-height: 1.45;
  color: var(--md-default-fg-color--light);
}
.eng-detail dd.eng-na { color: var(--md-default-fg-color--lighter); font-style: italic; }

/* When JS is disabled, the panels stay open so nothing is hidden. */
.no-js .eng-detail { grid-template-rows: 1fr; margin-top: .9rem; }

/* ---------- side-by-side table ---------- */
.eng-compare { margin: .6rem 0 1.2rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.md-typeset table.eng-compare-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: .75rem;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(20,30,50,.06), 0 6px 18px rgba(20,30,50,.06);
  display: table;
  font-size: .82rem;
}
.md-typeset .eng-compare-table th,
.md-typeset .eng-compare-table td {
  padding: .6rem .8rem;
  text-align: left;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  vertical-align: top;
  line-height: 1.45;
}
.md-typeset .eng-compare-table thead th {
  background: var(--md-code-bg-color);
  font-weight: 800;
  font-size: .78rem;
  color: var(--md-default-fg-color);
}
.md-typeset .eng-compare-table thead th.eng-col-consider {
  font-size: .64rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--lighter);
}
.md-typeset .eng-compare-table thead th.eng-col-accent {
  border-top: 3px solid var(--md-primary-fg-color);
  color: var(--md-primary-fg-color);
}
.md-typeset .eng-compare-table tbody th {
  font-weight: 700;
  color: var(--md-default-fg-color);
  background: var(--md-default-bg-color);
  white-space: nowrap;
}
.md-typeset .eng-compare-table td.eng-na {
  color: var(--md-default-fg-color--lighter);
  font-style: italic;
}
.md-typeset .eng-compare-table tbody tr:last-child th,
.md-typeset .eng-compare-table tbody tr:last-child td { border-bottom: 0; }
.md-typeset .eng-compare-table tbody tr:hover td,
.md-typeset .eng-compare-table tbody tr:hover th {
  background: color-mix(in srgb, var(--md-primary-fg-color) 5%, var(--md-default-bg-color));
}