/* Import Google Fonts for better typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  padding: 40px 20px;
  line-height: 1.6;
}

main {
  max-width: 1400px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 50px;
}

h1 {
  color: #2d3748;
  font-weight: 600;
  font-size: 2.5rem;
  letter-spacing: -0.025em;
  position: relative;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  border-radius: 2px;
}

.users-container {
  position: relative;
}

#listaUsuarios {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
  list-style: none;
  padding: 0;
}

/* Loading and Error States */
.loading, .error {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  font-size: 1.1rem;
  color: #4a5568;
}

.loading {
  color: #667eea;
  font-weight: 500;
}

.error {
  color: #e53e3e;
  font-weight: 500;
}

#listaUsuarios li {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  padding: 30px 25px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

#listaUsuarios li:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  border-color: rgba(102, 126, 234, 0.2);
}

.user-card {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.user-avatar {
  margin-bottom: 20px;
}

#listaUsuarios img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(102, 126, 234, 0.1);
  transition: all 0.3s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

#listaUsuarios li:hover img {
  border-color: rgba(102, 126, 234, 0.3);
  transform: scale(1.05);
}

.user-info {
  width: 100%;
}

#listaUsuarios h2 {
  font-size: 1.4rem;
  margin: 0 0 15px 0;
  color: #2d3748;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.user-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#listaUsuarios p {
  margin: 0;
  font-size: 0.95rem;
  color: #718096;
  font-weight: 400;
  line-height: 1.5;
}

#listaUsuarios p strong {
  color: #4a5568;
  font-weight: 500;
}

#listaUsuarios a {
  color: #667eea;
  text-decoration: none;
  transition: color 0.2s ease;
}

#listaUsuarios a:hover {
  color: #5a67d8;
  text-decoration: underline;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    padding: 20px 15px;
  }
  
  h1 {
    font-size: 2rem;
    margin-bottom: 30px;
  }
  
  #listaUsuarios {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  #listaUsuarios li {
    padding: 25px 20px;
  }
  
  #listaUsuarios img {
    width: 100px;
    height: 100px;
  }
  
  .loading, .error {
    padding: 40px 20px;
    font-size: 1rem;
  }
}

/* Loading animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#listaUsuarios li {
  animation: fadeInUp 0.6s ease-out forwards;
}

#listaUsuarios li:nth-child(1) { animation-delay: 0.1s; }
#listaUsuarios li:nth-child(2) { animation-delay: 0.2s; }
#listaUsuarios li:nth-child(3) { animation-delay: 0.3s; }
#listaUsuarios li:nth-child(4) { animation-delay: 0.4s; }
#listaUsuarios li:nth-child(5) { animation-delay: 0.5s; }
#listaUsuarios li:nth-child(6) { animation-delay: 0.6s; }
#listaUsuarios li:nth-child(7) { animation-delay: 0.7s; }
#listaUsuarios li:nth-child(8) { animation-delay: 0.8s; }
#listaUsuarios li:nth-child(9) { animation-delay: 0.9s; }
#listaUsuarios li:nth-child(10) { animation-delay: 1s; }