/* learn.css -- styles for the SEO content pages (the Learn hub, its guides, and the tool
   landing pages). It sits on top of style.css and borrows its tokens (--gold, --panel, --line,
   the spacing scale, the radii). Nothing here is inline, because the CSP refuses inline styles
   on these pages the same as everywhere else. */

/* ---- Lead paragraph under a page hero ------------------------------------- */
.learn-lead {
  font-size: var(--t-lead);
  line-height: 1.45;
  color: var(--text);
  margin: var(--s5) 0 0;
  max-width: 54ch;
}

/* ---- The Learn hub index -------------------------------------------------- */
.learn-hub__group { margin: 0 0 var(--s7); }
.learn-hub__group:last-child { margin-bottom: 0; }

.learn-hub__group-title {
  font-size: var(--t-product);
  line-height: 1.15;
  margin: 0 0 var(--s2);
  padding-bottom: var(--s2);
  border-bottom: 1px solid var(--line-soft);
}
.learn-hub__group-note {
  color: var(--muted);
  margin: 0 0 var(--s4);
  max-width: 60ch;
}

.learn-hub__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}
.learn-hub__item { border-bottom: 1px solid var(--line-soft); }

.learn-hub__link {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s1);
  padding: var(--s4) var(--s4) var(--s4) var(--s5);
  position: relative;
  text-decoration: none;
  color: var(--text);
  border-left: 2px solid transparent;
}
.learn-hub__link::before {
  content: "";
  position: absolute;
  left: var(--s3);
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--brass);
  transform: rotate(45deg);
  opacity: 0.55;
}
.learn-hub__link:hover,
.learn-hub__link:focus-visible {
  border-left-color: var(--brass);
  background: linear-gradient(90deg, var(--panel-2), transparent 70%);
  color: var(--text);
  outline: none;
}
.learn-hub__link:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }
.learn-hub__name {
  font-family: var(--ui);
  font-weight: 600;
  font-size: var(--t-body);
  color: var(--parchment);
}
.learn-hub__link:hover .learn-hub__name,
.learn-hub__link:focus-visible .learn-hub__name { color: var(--brass-bright); }
.learn-hub__note { color: var(--muted); font-size: var(--t-micro); }

@media (min-width: 720px) {
  .learn-hub__link {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    gap: var(--s5);
    align-items: baseline;
  }
}

/* ---- A worked-example callout (odds arithmetic, and the like) -------------- */
.learn-example {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-left: 4px solid var(--brass);
  border-radius: var(--radius);
  padding: var(--s4) var(--s5);
  margin: var(--s5) 0;
  box-shadow: inset 0 1px 0 var(--edge-hi), 0 1px 3px var(--shadow);
}
.learn-example h3 {
  margin: 0 0 var(--s3);
  font-size: var(--t-lead);
  color: var(--parchment);
}
.learn-example p { margin: 0 0 var(--s2); }
.learn-example p:last-child { margin-bottom: 0; }
.learn-example .num {
  font-family: var(--mono, ui-monospace, monospace);
  color: var(--brass-bright);
  font-variant-numeric: tabular-nums;
}

/* ---- Related guides at the foot of a guide -------------------------------- */
.learn-related {
  margin: var(--s7) 0 0;
  padding-top: var(--s5);
  border-top: 1px solid var(--line-soft);
}
.learn-related h2 {
  font-size: var(--t-lead);
  margin: 0 0 var(--s3);
  border: 0;
  padding: 0;
}
.learn-related ul { list-style: none; margin: 0; padding: 0; }
.learn-related li { margin: 0 0 var(--s2); }
.learn-related a { color: var(--brass); }
.learn-related a:hover { color: var(--brass-bright); }

/* ---- The call-to-action panel that closes every page ---------------------- */
.learn-cta {
  margin: var(--s7) 0 0;
  padding: var(--s5) var(--s5) var(--s4);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 var(--edge-hi), 0 1px 3px var(--shadow);
}
.learn-cta h2 {
  margin: 0 0 var(--s2);
  border: 0;
  padding: 0;
  font-size: var(--t-lead);
}
.learn-cta p { color: var(--text); margin: 0 0 var(--s4); max-width: 54ch; }
.learn-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s3);
  margin: 0 0 var(--s4);
}
.learn-cta__legal {
  font-family: var(--ui);
  font-size: var(--t-micro);
  letter-spacing: 0.02em;
  color: var(--muted);
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  .learn-hub__link { transition: none; }
}