/* ------------------ VARIABLES DE COLOR ------------------ */
:root {
  --color-primario: #2c3e50;
  --color-secundario: #3498db;
  --color-acento: #e91e63;
  --color-fondo: #f5f5f5;
  --color-texto: #333;
  --color-blanco: #fff;

  --shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

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

body {
  font-family: "Poppins", sans-serif;
  background: var(--color-fondo);
  color: var(--color-texto);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ------------------ NAVBAR ------------------ */
.navbar {
  background: var(--color-primario);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.5rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .logo {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-blanco);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar .logo i {
  color: var(--color-secundario);
}

.menu-toggle {
  font-size: 1.5rem;
  color: var(--color-blanco);
  background: none;
  border: none;
  cursor: pointer;
  display: none; /* visible solo en móviles */
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1rem;
}

.nav-links li a {
  color: var(--color-blanco);
  font-weight: 500;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  transition: background 0.3s;
}

.nav-links li a:hover {
  background: var(--color-secundario);
}

/* ------------------ CONTENEDOR PRINCIPAL ------------------ */
.container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-family: "Roboto Slab", serif;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1rem;
  color: #555;
}

/* ------------------ GRID DE HERRAMIENTAS ------------------ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--color-blanco);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  transform: translateY(-6px);
}

.card-banner {
  font-size: 2.5rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--color-blanco);
}

.color-1 { background: #e67e22; }
.color-2 { background: #2980b9; }
.color-3 { background: #16a085; }

.card-body {
  padding: 1.2rem;
  text-align: center;
}

.card-body h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.card-body p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: #666;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-secundario);
  color: var(--color-blanco);
  font-weight: 600;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background 0.3s;
}

.btn:hover {
  background: var(--color-acento);
}

/* ------------------ FOOTER ------------------ */
footer {
  text-align: center;
  padding: 1rem;
  background: var(--color-primario);
  color: var(--color-blanco);
  margin-top: 2rem;
  font-size: 0.9rem;
}

/* ------------------ RESPONSIVE ------------------ */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 60px;
    right: 0;
    background: var(--color-primario);
    flex-direction: column;
    width: 200px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    padding: 1rem 0;
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links li {
    text-align: center;
  }

  .nav-links li a {
    display: block;
    padding: 0.8rem;
  }
}