/* --------------------------------------------------
   3D Button Utility (Pastel Blue)
   -------------------------------------------------- */
.btn-3d {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #ffffff;
  padding: 12px 24px;
  border: none;
  border-radius: 30px; /* bordes redondos premium */
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(59,130,246,0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-3d:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59,130,246,0.6);
}
.btn-3d:active {
  transform: translateY(1px);
}

/* Apply 3D style to pastel challenge buttons */
.pastel-challenge-btn, .pastel-sub-activity-btn {
  min-width: 250px;
  padding: 12px 20px;
  font-size: 1.2rem;
  border-radius: 30px; /* botones redondos */
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
}

.pastel-challenge-btn .btn-icon, .pastel-sub-activity-btn .sub-btn-icon {
  font-size: 1.5rem;
}

.pastel-challenge-btn .btn-title, .pastel-sub-activity-btn .sub-btn-title {
  font-weight: 600;
}

  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  border: none;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(59,130,246,0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pastel-challenge-btn:hover, .pastel-sub-activity-btn:hover, .teacher-menu-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59,130,246,0.6);
}
.pastel-challenge-btn:active, .pastel-sub-activity-btn:active, .teacher-menu-btn:active {
  transform: translateY(1px);
}

/* Avatar + Name block */
.avatar-name {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  font-weight: 600;
  color: #4338ca;
}
.user-name {
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
}
.avatar-name img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid #2563eb;
}
.full-name {
  margin-left: 8px;
  color: #ffffff;
  font-weight: 600;
  font-size: 1.5rem; /* tamaño mayor */
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 14px 24px;
  border-radius: 8px;
  font-size: 0.95em;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 10000;
}
.toast.show { opacity: 1; }