/* ============================================
   Osnovne informacije o kursu — kartice
   templates/part/course-overview.twig
   Padajuće kartice — 2 kolone na desktopu, jedna ispod druge na užem ekranu.
   ============================================ */

.course-overview {
  background: var(--grey-faint);
}

.course-overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.course-overview-card {
  --co-accent: var(--blue-classic);
  --co-accent-soft: var(--blue-faint);

  position: relative;
  border: 1px solid rgba(65, 133, 170, 0.18);
  background: var(--white);
  box-shadow: 0 10px 26px rgba(13, 14, 18, 0.05);
  transition:
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.course-overview-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--co-accent);
  content: "";
}

.course-overview-card:nth-child(3n + 2) {
  --co-accent: var(--orange-dark);
  --co-accent-soft: rgba(255, 115, 25, 0.12);
}

.course-overview-card:nth-child(3n + 3) {
  --co-accent: var(--green-vivid);
  --co-accent-soft: rgba(46, 203, 152, 0.14);
}

.course-overview-head {
  margin: 0;
}

.course-overview-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 0.9rem;
  padding: 1.1rem 1.1rem 1.1rem 1.35rem;
  border: 0;
  background: transparent;
  color: var(--grey-olive);
  text-align: left;
}

.course-overview-toggle:focus-visible {
  outline: 2px solid var(--co-accent);
  outline-offset: -2px;
}

.course-overview-icon {
  display: grid;
  flex: 0 0 auto;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border-radius: 50%;
  background: var(--co-accent-soft);
  color: var(--co-accent);
  font-size: 1.1rem;
}

.course-overview-lead {
  max-width: 680px;
  margin: 0 auto;
  color: var(--grey-clay);
}

.course-overview-name {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  flex-direction: column;
  gap: 0.15rem;
}

.course-overview-sub {
  color: var(--grey-clay);
  font-size: 0.85rem;
  font-weight: 400;
  line-height: 1.35;
}

.course-overview-title {
  font-family: var(--h-font), system-ui, sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.25;
}

/* Strelica: crta se CSS-om, okreće se kad je kartica otvorena. */
.course-overview-chev {
  position: relative;
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--co-accent-soft);
  transition: transform 0.25s ease;
}

.course-overview-chev::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--co-accent);
  border-bottom: 2px solid var(--co-accent);
  content: "";
  transform: translate(-50%, -70%) rotate(45deg);
}

.course-overview-toggle:not(.collapsed) .course-overview-chev {
  transform: rotate(180deg);
}

.course-overview-body {
  padding: 0 1.35rem 1.35rem;
  color: var(--grey-olive);
  font-size: 1rem;
  line-height: 1.6;
}

.course-overview-body > :last-child {
  margin-bottom: 0;
}

.course-overview-body p {
  margin-bottom: 0.85rem;
}

/* Spiskovi: kvačica u boji kartice umesto tačke. */
.course-overview-body ul {
  margin: 0 0 0.85rem;
  padding: 0;
  list-style: none;
}

.course-overview-body li {
  position: relative;
  padding: 0.3rem 0 0.3rem 1.85rem;
}

.course-overview-body li + li {
  border-top: 1px dashed rgba(65, 133, 170, 0.18);
}

.course-overview-body li::before {
  position: absolute;
  top: 0.55rem;
  left: 0;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  background: var(--co-accent-soft);
  content: "";
}

.course-overview-body li::after {
  position: absolute;
  top: 0.78rem;
  left: 0.42rem;
  width: 0.32rem;
  height: 0.55rem;
  border-right: 2px solid var(--co-accent);
  border-bottom: 2px solid var(--co-accent);
  content: "";
  transform: rotate(45deg);
}

/* Numerisan spisak (plan i program): broj u krugu u boji kartice. */
.course-overview-body ol {
  margin: 0 0 0.85rem;
  padding: 0;
  list-style: none;
  counter-reset: co-step;
}

.course-overview-body ol > li {
  position: relative;
  padding: 0.45rem 0 0.45rem 2.4rem;
  counter-increment: co-step;
}

.course-overview-body ol > li + li {
  border-top: 1px dashed rgba(65, 133, 170, 0.18);
}

.course-overview-body ol > li::before {
  display: grid;
  position: absolute;
  top: 0.45rem;
  left: 0;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border-radius: 50%;
  background: var(--co-accent-soft);
  color: var(--co-accent);
  content: counter(co-step);
  font-size: 0.85rem;
  font-weight: 800;
}

.course-overview-body ol > li::after {
  content: none;
}

.course-overview-body strong {
  color: var(--grey-olive);
  font-weight: 800;
}

.course-overview-card {
  scroll-margin-top: 6rem;
}

/* Slika kursa u kartici: preko cele širine na telefonu, levo od teksta od 576px. */
.course-overview-img {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 576px) {
  .course-overview-body.has-image {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 0 1.25rem;
    align-items: start;
  }

  .course-overview-body.has-image .course-overview-img {
    grid-row: span 3;
    margin-bottom: 0;
  }

  .course-overview-body.has-image > p {
    margin-bottom: 0.75rem;
  }
}

/* Kursevi kao linkovi (hub oblasti): obični linkovi u dve kolone; podvlačenje pri prelazu
   je sajtovsko `.hover-me` iz shell.css (linija raste ispod linka). */
.course-overview-body ul.course-overview-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.15rem 1.25rem;
  margin: 0 0 1rem;
}

.course-overview-body .course-overview-links li {
  padding: 0.2rem 0;
  border: 0;
}

.course-overview-body .course-overview-links li::before,
.course-overview-body .course-overview-links li::after {
  content: none;
}

.course-overview-links a {
  color: var(--grey-olive);
  font-weight: 600;
  line-height: 1.35;
  transition: color 0.2s ease;
}

.course-overview-links a:hover,
.course-overview-links a:focus-visible {
  color: var(--co-accent);
}

.course-overview-body .course-overview-links--plain li {
  color: var(--grey-clay);
}

@media (min-width: 576px) {
  .course-overview-body ul.course-overview-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.course-overview-more-label {
  margin-bottom: 0.5rem;
  color: var(--grey-clay);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.course-overview-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--co-accent);
  font-weight: 800;
  text-decoration: none;
}

.course-overview-cta i {
  font-size: 0.85rem;
  transition: transform 0.2s ease;
}

.course-overview-cta:hover i {
  transform: translateX(3px);
}

@media (max-width: 575.98px) {
  .course-overview-toggle {
    gap: 0.75rem;
    padding: 0.85rem 0.85rem 0.85rem 1.1rem;
  }

  .course-overview-icon {
    width: 2.35rem;
    height: 2.35rem;
    font-size: 1rem;
  }

  .course-overview-title {
    font-size: 1.05rem;
  }

  .course-overview-body {
    padding: 0 1rem 1.1rem 1.1rem;
  }
}

@media (min-width: 992px) {
  .course-overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: 1.25rem;
  }

  .course-overview-card:hover {
    border-color: color-mix(in srgb, var(--co-accent) 42%, var(--white));
    box-shadow: 0 16px 34px rgba(13, 14, 18, 0.09);
  }

  .course-overview-title {
    font-size: 1.2rem;
  }

  .course-overview-toggle {
    padding: 1.35rem 1.4rem 1.35rem 1.6rem;
  }

  /* Kartice sa podnaslovom (oblasti na hubu): ista visina i kad se naslov prelomi u dva reda. */
  .course-overview-toggle:has(.course-overview-sub) {
    min-height: 7.1rem;
  }

  .course-overview-body {
    padding: 0 1.4rem 1.5rem 1.6rem;
  }
}

/* Ukras pozadine (`decor: true`): tačkasta mreža koja bledi ka
   ivicama, dva narandžasta odsjaja i krupni, jedva vidljivi znaci koda. Sve iza sadržaja, bez uticaja na klikove. */
.course-overview--decor {
  --cod-dot: rgba(13, 14, 18, 0.1);
  --cod-glow-1: rgba(255, 115, 25, 0.1);
  --cod-glow-2: rgba(59, 121, 171, 0.08);
  --cod-glyph: rgba(13, 14, 18, 0.045);
  --cod-glyph-accent: rgba(255, 115, 25, 0.12);

  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.course-overview--white {
  background: var(--white);
}

.course-overview--decor > .container {
  position: relative;
  z-index: 1;
}

.course-overview--decor::before,
.course-overview--decor::after {
  position: absolute;
  z-index: 0;
  content: "";
  pointer-events: none;
}

.course-overview--decor::before {
  inset: 0;
  background-image: radial-gradient(var(--cod-dot) 1px, transparent 1.5px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
}

.course-overview--decor::after {
  inset: 0;
  background:
    radial-gradient(circle 420px at 0% 0%, var(--cod-glow-1), transparent 70%),
    radial-gradient(circle 520px at 100% 100%, var(--cod-glow-2), transparent 70%);
}

.course-overview-decor {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  user-select: none;
}

.course-overview-decor span {
  position: absolute;
  color: var(--cod-glyph);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.course-overview-decor .cod-1 {
  top: 2.5rem;
  left: -1.5rem;
  font-size: 9rem;
  transform: rotate(-8deg);
}

.course-overview-decor .cod-2 {
  top: 38%;
  right: -2rem;
  font-size: 11rem;
  transform: rotate(6deg);
}

.course-overview-decor .cod-3 {
  bottom: 18%;
  left: 3%;
  font-size: 7rem;
}

.course-overview-decor .cod-4 {
  right: 6%;
  bottom: -1rem;
  color: var(--cod-glyph-accent);
  font-size: 8rem;
}

@media (max-width: 767.98px) {
  .course-overview-decor .cod-1 { font-size: 5rem; top: 1rem; }
  .course-overview-decor .cod-2 { font-size: 6rem; }
  .course-overview-decor .cod-3 { font-size: 4.5rem; }
  .course-overview-decor .cod-4 { font-size: 5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .course-overview-card,
  .course-overview-chev {
    transition: none;
  }
}