/**
 * assets/css/prerequisites.css
 * Course prerequisites view. Uses the app's main.css tokens; prefixed `pq-`.
 * Required / recommended / not-needed lists plus an interactive readiness check.
 */

.pq-head { margin-block-end: var(--space-6); }
.pq-head__sub { margin: var(--space-2) 0 0; color: var(--text-secondary); font-size: var(--text-base); max-width: 68ch; line-height: 1.6; }
.pq-head__sub b { color: var(--text-primary); font-weight: var(--font-semibold); }

/* two-column band for required + recommended */
.pq-cols { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: start; }
@media (max-width: 760px) { .pq-cols { grid-template-columns: 1fr; gap: var(--space-4); } }

.pq-group { margin-block-end: var(--space-6); }
.pq-group__head { display: flex; align-items: baseline; gap: 9px; margin: 0 0 var(--space-4); padding-block-end: 8px; border-block-end: 1px solid var(--border-color); }
.pq-group__name { font-family: var(--font-display); font-size: var(--text-xl); color: var(--text-primary); margin: 0; }
.pq-group__lead { font-size: var(--text-sm); color: var(--text-muted); margin-inline-start: auto; }

.pq-list { display: grid; gap: var(--space-2); }
.pq-item {
  display: grid; grid-template-columns: 26px 1fr; gap: var(--space-4);
  padding: var(--space-4); border-radius: var(--radius-md);
  border: 1px solid var(--border-color); background: var(--bg-card);
  animation: pq-in .4s var(--ease-out, cubic-bezier(.16,1,.3,1)) both;
}
@keyframes pq-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.pq-item__mark {
  --pq-c: var(--accent-green);
  display: grid; place-items: center; width: 24px; height: 24px; border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--pq-c) 16%, transparent); border: 1px solid color-mix(in oklab, var(--pq-c) 55%, var(--border-color));
  color: var(--pq-c); font-size: var(--text-sm); font-weight: var(--font-bold); margin-block-start: 2px;
}
.pq-item__body { min-width: 0; }
.pq-item__title { display: flex; align-items: baseline; gap: 8px; font-family: var(--font-display); font-size: var(--text-base); font-weight: var(--font-bold); color: var(--text-primary); line-height: 1.3; }
.pq-item__emoji { font-size: var(--text-lg); }
.pq-item__desc { margin: 5px 0 0; color: var(--text-secondary); font-size: var(--text-sm); line-height: 1.6; max-width: 62ch; text-wrap: pretty; }

.pq-group--required  .pq-item__mark { --pq-c: var(--accent-green); }
.pq-group--recommended .pq-item__mark { --pq-c: var(--accent-blue); }

/* not-needed band: relaxed, reassuring */
.pq-relief { margin-block: var(--space-6); padding: var(--space-6); border: 1px solid var(--border-color); border-radius: var(--radius-xl); background: color-mix(in oklab, var(--bg-card) 55%, transparent); }
.pq-relief__head { display: flex; align-items: baseline; gap: 9px; margin: 0 0 var(--space-4); }
.pq-relief__name { font-family: var(--font-display); font-size: var(--text-xl); color: var(--text-primary); margin: 0; }
.pq-relief__list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-4); }
.pq-relief__item { display: grid; grid-template-columns: 26px 1fr; gap: 12px; }
.pq-relief__mark { display: grid; place-items: center; width: 24px; height: 24px; border-radius: var(--radius-full); border: 1px solid var(--border-color); color: var(--text-muted); margin-block-start: 2px; }
.pq-relief__title { font-weight: var(--font-semibold); color: var(--text-primary); font-size: var(--text-base); display: flex; align-items: baseline; gap: 7px; }
.pq-relief__desc { margin: 4px 0 0; color: var(--text-secondary); font-size: var(--text-sm); line-height: 1.55; }

/* ---- interactive readiness check ---- */
.pq-check {
  margin-block: var(--space-6);
  border: 1px solid color-mix(in oklab, var(--accent-green) 30%, var(--border-color));
  border-radius: var(--radius-xl);
  background:
    radial-gradient(130% 100% at 100% 0%, color-mix(in oklab, var(--accent-green) 8%, transparent), transparent 55%),
    var(--bg-card);
  overflow: hidden;
}
.pq-check__grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(260px, 1fr); }
@media (max-width: 820px) { .pq-check__grid { grid-template-columns: 1fr; } }
.pq-check__left { padding: var(--space-6); }
.pq-check__title { display: flex; align-items: center; gap: 9px; margin: 0 0 6px; font-family: var(--font-display); font-size: var(--text-xl); color: var(--text-primary); }
.pq-check__title::before { content: "✓"; display: grid; place-items: center; width: 28px; height: 28px; border-radius: var(--radius-full); background: var(--accent-green); color: var(--text-inverse); font-size: var(--text-base); }
.pq-check__hint { margin: 0 0 var(--space-4); color: var(--text-secondary); font-size: var(--text-sm); line-height: 1.55; max-width: 60ch; }

.pq-set-label { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); font-weight: var(--font-semibold); margin: var(--space-4) 0 8px; }
.pq-checks { display: grid; gap: 7px; }
.pq-opt {
  display: flex; align-items: flex-start; gap: 11px; cursor: pointer;
  padding: 10px 12px; border-radius: var(--radius-md); border: 1px solid var(--border-color); background: var(--bg-elevated);
  transition: border-color .2s, background .2s;
}
.pq-opt:hover { border-color: var(--text-muted); }
.pq-opt input { position: absolute; opacity: 0; width: 0; height: 0; }
.pq-opt__box { flex: none; width: 20px; height: 20px; border-radius: 6px; border: 1.5px solid var(--border-color); display: grid; place-items: center; color: var(--text-inverse); font-size: var(--text-xs); margin-block-start: 1px; transition: background .15s, border-color .15s; }
.pq-opt input:checked + .pq-opt__box { background: var(--accent-green); border-color: var(--accent-green); }
.pq-opt input:checked + .pq-opt__box::after { content: "✓"; }
.pq-opt input:focus-visible + .pq-opt__box { outline: 2px solid var(--accent-blue); outline-offset: 2px; }
.pq-opt.is-on { border-color: color-mix(in oklab, var(--accent-green) 45%, var(--border-color)); background: color-mix(in oklab, var(--accent-green) 8%, var(--bg-elevated)); }
.pq-opt__label { font-size: var(--text-sm); color: var(--text-primary); line-height: 1.5; }

/* readiness side panel */
.pq-check__side { padding: var(--space-6); border-inline-start: 1px solid var(--border-color); background: color-mix(in oklab, var(--bg-elevated) 40%, transparent); display: flex; flex-direction: column; gap: var(--space-4); }
@media (max-width: 820px) { .pq-check__side { border-inline-start: 0; border-block-start: 1px solid var(--border-color); } }
.pq-meter__top { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-block-end: 7px; }
.pq-meter__label { font-size: var(--text-sm); color: var(--text-secondary); }
.pq-meter__val { font-family: var(--font-mono); font-weight: var(--font-bold); color: var(--accent-green); }
.pq-meter__bar { height: 10px; border-radius: 5px; overflow: hidden; background: color-mix(in oklab, var(--bg-primary) 55%, var(--border-color)); }
.pq-meter__fill { height: 100%; border-radius: 5px; background: var(--accent-green); transition: width .4s var(--ease-out, cubic-bezier(.16,1,.3,1)); }

.pq-verdict { border-radius: var(--radius-md); border: 1px solid var(--border-color); padding: var(--space-4); background: var(--bg-card); }
.pq-verdict__icon { font-size: var(--text-2xl); line-height: 1; }
.pq-verdict__title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: var(--font-bold); color: var(--text-primary); margin: 6px 0 4px; }
.pq-verdict__text { font-size: var(--text-sm); color: var(--text-secondary); line-height: 1.55; }
.pq-verdict__missing { margin: 10px 0 0; padding: 0; list-style: none; display: grid; gap: 5px; }
.pq-verdict__missing li { font-size: var(--text-sm); color: var(--accent-yellow); display: flex; gap: 7px; }
.pq-verdict__missing li::before { content: "•"; }
.pq-verdict--ready { border-color: color-mix(in oklab, var(--accent-green) 50%, var(--border-color)); background: color-mix(in oklab, var(--accent-green) 9%, var(--bg-card)); }
.pq-verdict--almost { border-color: color-mix(in oklab, var(--accent-yellow) 45%, var(--border-color)); }

.pq-cta { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: var(--radius-md);
  background: var(--accent-green); color: var(--text-inverse); font-weight: var(--font-bold); font-family: var(--font-sans); font-size: var(--text-base);
  text-decoration: none; border: 1px solid var(--accent-green); transition: filter .2s, transform .15s; }
.pq-cta:hover { filter: brightness(1.06); transform: translateY(-1px); }
.pq-cta--ghost { background: transparent; color: var(--accent-blue); border-color: color-mix(in oklab, var(--accent-blue) 45%, var(--border-color)); }
.pq-cta--ghost:hover { background: color-mix(in oklab, var(--accent-blue) 12%, transparent); filter: none; }
.pq-cta-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }

@media (prefers-reduced-motion: reduce) {
  .pq-item { animation: none; }
  .pq-meter__fill { transition: none; }
  .pq-cta:hover { transform: none; }
}