body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f7fafc;
  margin: 0;
  padding: 0;
}

.header {
  background-color: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-volver-quetzal {
  color: #3182ce;
  text-decoration: none;
  font-weight: bold;
}

.container-herramientas {
  max-width: 1100px;
  margin: 30px auto;
  padding: 0 20px;
}

.banner-bienvenida {
  background: linear-gradient(135deg, #2c3e50 0%, #3182ce 100%);
  color: white;
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 30px;
}

.banner-bienvenida h1 {
  margin: 0 0 10px 0;
  font-size: 1.8rem;
}

.banner-bienvenida p {
  margin: 0;
  opacity: 0.9;
  font-size: 1rem;
}

.seccion-titulo {
  color: #2d3748;
  font-size: 1.3rem;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.grid-herramientas {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card-herramienta {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-herramienta:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.card-herramienta h3 {
  margin: 0 0 10px 0;
  color: #2d3748;
  font-size: 1.1rem;
}

.card-herramienta p {
  color: #718096;
  font-size: 0.9rem;
  line-height: 1.4;
  flex-grow: 1;
  margin-bottom: 20px;
}

.btn-herramienta {
  display: inline-block;
  text-align: center;
  background-color: #3182ce;
  color: white;
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 8px;
  font-weight: bold;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-herramienta:hover {
  background-color: #2b6cb0;
}

.icon-glucosa {
    background-color: #fef2f2;
    color: #dc2626;
}

.btn-glucosa-card {
    background-color: #dc2626;
    color: #ffffff;
}

.btn-glucosa-card:hover {
    background-color: #b91c1c;
}