body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #e0e7ff 0%, #f5f5f5 100%);
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}
.back-button {
  display: inline-block;
  margin: 2rem 0 0.5rem 0;
  padding: 0.5rem 1.2rem;
  background: #f3f6fd;
  color: #2a4d8f;
  border-radius: 2rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 1px 6px rgba(80, 112, 255, 0.08);
  transition: background 0.18s, color 0.18s, box-shadow 0.18s;
  border: 1px solid #e0e7ff;
}
.back-button:hover, .back-button:focus {
  background: #4f8cff;
  color: #fff;
  box-shadow: 0 2px 12px rgba(80, 112, 255, 0.14), 0 0 0 3px rgba(79, 140, 255, 0.4);
}
.challenge-goal {
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 2px 12px rgba(80, 112, 255, 0.10);
  margin: 2.5rem 0 1.5rem 0;
  padding: 1.2rem 2rem 1.2rem 2rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
}

.challenge-goal h1 {
  font-size: 1.3rem;
  color: #2a4d8f;
  margin: 0 0 0.5rem 0;
  font-weight: 700;
}

.challenge-goal .goal-bonus {
  color: #22c55e;
  font-size: 1rem;
  display: block;
  margin-top: 0.4rem;
}

.profile-card {
  background: #fff;
  padding: 2rem 2.5rem;
  border-radius: 1.2rem;
  box-shadow: 0 4px 24px rgba(80, 112, 255, 0.12), 0 1.5px 6px rgba(0,0,0,0.06);
  text-align: center;
  max-width: 340px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: box-shadow 0.2s;
}

.profile-card:hover {
  box-shadow: 0 8px 32px rgba(80, 112, 255, 0.18), 0 3px 12px rgba(0,0,0,0.10);
}

.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.2rem;
  border: 3px solid #4f8cff;
  box-shadow: 0 2px 8px rgba(80, 112, 255, 0.10);
}

.profile-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: #2a4d8f;
  margin: 0.2rem 0 0.1rem 0;
}

.profile-role {
  color: #4f8cff;
  font-size: 1.05rem;
  margin: 0 0 0.7rem 0;
  font-weight: 500;
}

.profile-bio {
  font-size: 1rem;
  color: #444;
  margin-bottom: 1.2rem;
  line-height: 1.5;
}

.social-icons {
  display: flex;
  gap: 1.1rem;
  justify-content: center;
}

.social-icons a {
  color: #b3c6e0;
  transition: color 0.2s, transform 0.2s;
  display: inline-flex;
  align-items: center;
}

.social-icons a:hover,
.social-icons a:focus {
  color: #4f8cff;
  transform: translateY(-2px) scale(1.12);
  outline: none;
}

@media (max-width: 480px) {
  .challenge-goal {
    padding: 0.8rem 0.5rem;
    max-width: 98vw;
    font-size: 0.97rem;
  }
  .profile-card {
    padding: 1.2rem 0.7rem;
    max-width: 98vw;
  }
  .profile-bio {
    font-size: 0.9rem;
  }
}