/* ==========================================================================
   Join us (mitarbeit.html): open positions, open thesis topics and the
   invitation shown in place of an empty list. The topic entries reuse the
   thesis cards and the listing filter from main.css.
   ========================================================================== */
.positions-section {
  margin-bottom: 4rem;
}

.position-list {
  display: grid;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.position-card {
  padding: 1.5rem 1.75rem;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--border-radius);
}

.position-type {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.05rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--sky-100);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.02em;
}

.position-head h3 {
  margin: 0;
  font-size: 1.25rem;
}

.position-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  margin: 0.6rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.position-facts i {
  margin-right: 0.4rem;
  color: var(--color-primary-light);
}

.position-body {
  margin-top: 1rem;
}

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

.position-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* invitation instead of an empty list (no positions, no topics) */
.positions-empty {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius);
}

.positions-empty > i {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1.05rem;
}

.positions-empty h3 {
  margin: 0.35rem 0 0.5rem;
  font-size: 1.1rem;
}

.positions-empty p {
  margin: 0 0 1rem;
  max-width: 70ch;
}

.topic-list + .topics-propose {
  margin-top: 2rem;
}

.thesis-meta .thesis-type:first-child {
  margin-left: 0;
}

.topic-facts {
  margin: 1rem 0 0;
  font-size: 0.92rem;
}

.topic-facts > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.75rem;
}

.topic-facts dt {
  min-width: 6rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
}

.topic-facts dd {
  margin: 0;
}

@media (max-width: 640px) {
  .position-card,
  .positions-empty {
    padding: 1.25rem;
  }

  .positions-empty {
    flex-direction: column;
    gap: 0.75rem;
  }
}