/* Estilos base */
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: hsl(210, 20%, 95%);
  color: #333;
}

.main-header {
  background-color: hsl(220, 25%, 20%);
  color: #fff;
  text-align: center;
  padding: 3vh 1rem;
}

.main-header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 1.8rem;
}

.main-header p {
  margin: 0;
  opacity: 0.8;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 4vh auto;
}

/* Grid de tarjetas responsive */
.cards-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}

/* Estructura de cada Tarjeta */
.card {
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  width: 320px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.card-registered {
  background-color: hsla(145, 30%, 96%, 1);
  border-color: hsl(145, 40%, 75%);
}

.card-header h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.2rem;
  color: hsl(220, 25%, 25%);
}

.badge {
  display: inline-block;
  background-color: hsl(210, 15%, 88%);
  color: #555;
  font-size: 0.85rem;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.card-body label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  font-weight: bold;
}

.input-group {
  display: flex;
  gap: 0.5rem;
}

.ip-input {
  flex: 1;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.95rem;
}

.ip-input[readonly] {
  background-color: #e9ecef;
  color: #495057;
  border-color: #ced4da;
  cursor: not-allowed;
}

.btn-save {
  background-color: hsl(205, 75%, 45%);
  color: white;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  transition: background-color 0.2s;
}

.btn-save:hover {
  background-color: hsl(205, 80%, 35%);
}

.status-locked {
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: #2e7d32;
  font-weight: bold;
}

.msg-feedback {
  font-size: 0.85rem;
  margin-top: 0.5rem;
  min-height: 1.2rem;
}

.msg-feedback.error {
  color: #d32f2f;
}

.msg-feedback.success {
  color: #2e7d32;
}

/* Adaptación responsive para pantallas de teléfono */
@media (max-width: 768px) {
  .cards-grid {
    flex-direction: column;
    align-items: center;
  }
  
  .card {
    width: 100%;
    max-width: 350px;
  }
}