.learning-header {
  margin-bottom: 1.5rem;
}

.developer-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(12, 22, 41, 0.85);
  border: 4px solid var(--accent);
  border-radius: 0;
}

.developer-photo {
  width: 64px;
  height: 64px;
  border: 3px solid var(--accent);
  image-rendering: pixelated;
  flex-shrink: 0;
}

.developer-info {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.developer-name {
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: bold;
}

.developer-subtitle {
  font-size: 0.55rem;
  color: var(--muted);
  line-height: 1.4;
}

.learning-activity-card,
.sleep-option {
  border: 4px solid rgba(255, 255, 255, 0.08);
  background: rgba(12, 22, 41, 0.85);
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.learning-activity-header,
.sleep-option-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--accent);
  font-size: 0.65rem;
}

.learning-activity-meta,
.sleep-option-meta {
  font-size: 0.6rem;
  color: var(--muted);
  line-height: 1.5;
}

.learning-activity-cost {
  font-size: 0.55rem;
  color: var(--text-color);
  opacity: 0.8;
}

.learning-activity-card button,
.sleep-option button {
  margin-top: 0.4rem;
  align-self: flex-start;
}

.sleep-options {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

#learning-window,
#sleep-window {
  width: clamp(320px, 45vw, 560px);
}

.skill-selector-button {
  background: rgba(16, 29, 52, 0.7);
  border: 4px solid transparent;
  padding: 0.45rem 0.6rem;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.5rem;
  cursor: var(--cursor-pointer), pointer;
  transition: all 0.2s ease;
}

.skill-selector-button:hover {
  background: rgba(20, 35, 60, 0.9);
}

.skill-selector-button.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(25, 40, 65, 0.9);
}

.skill-selector {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

@media (min-width: 769px) and (max-width: 1024px) {

  #learning-window,
  #sleep-window {
    width: clamp(400px, 50vw, 600px);
  }

  .learning-activity-card,
  .sleep-option {
    padding: 0.9rem 1rem;
  }

  .skill-selector-button {
    padding: 0.5rem 0.7rem;
    font-size: 0.55rem;
    min-height: 40px;
  }
}

@media (max-width: 768px) {
  .developer-card {
    padding: 0.8rem;
    gap: 0.8rem;
  }

  .developer-photo {
    width: 48px;
    height: 48px;
  }

  .developer-name {
    font-size: 0.7rem;
  }

  .developer-subtitle {
    font-size: 0.6rem;
  }

  .learning-activity-card,
  .sleep-option {
    padding: 0.9rem 1rem;
    margin-bottom: 0.8rem;
  }

  .learning-activity-header,
  .sleep-option-header {
    font-size: 0.7rem;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .learning-activity-meta,
  .sleep-option-meta {
    font-size: 0.65rem;
  }

  .learning-activity-card button,
  .sleep-option button {
    width: 100%;
    min-height: 44px;
  }

  .skill-selector {
    gap: 0.5rem;
  }

  .skill-selector-button {
    padding: 0.5rem 0.7rem;
    font-size: 0.6rem;
    min-height: 40px;
    flex: 1 1 auto;
  }
}

@media (max-width: 480px) {
  .developer-photo {
    width: 40px;
    height: 40px;
  }

  .developer-name {
    font-size: 0.65rem;
  }

  .developer-subtitle {
    font-size: 0.55rem;
  }

  .learning-activity-card,
  .sleep-option {
    padding: 0.8rem 0.9rem;
  }

  .learning-activity-header,
  .sleep-option-header {
    font-size: 0.65rem;
  }

  .learning-activity-meta,
  .sleep-option-meta {
    font-size: 0.6rem;
  }

  .skill-selector-button {
    font-size: 0.55rem;
    padding: 0.45rem 0.6rem;
    min-height: 36px;
  }
}