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21 June 2025

Contenedor de efectos de luz HTML con CSS

28 October 2025

Calculadora matemática y asistente: HTML, CSS, JavaScript

HTML

<!DOCTYPE html>
<html lang="es">
<head>
  <meta charset="UTF-8">
  <title>Curso HTML</title>
  <link href="https://fonts.googleapis.com/css2?family=Chicle&display=swap" rel="stylesheet">
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

body {
      font-family: 'Arial', sans-serif;
      background: #E3F2FD; /* Fondo suave color azul pastel */
      overflow-x: hidden;
    }

.titulo {
      background: linear-gradient(to right, #1E90FF,#778899);
      color: white;
      font-family: 'Chicle', cursive;
      text-align: center;
      font-size: 90px;
      padding: 35px 0;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }
</script>

.barra-lateral {
      position: absolute;
      top: -100%;
      left: 0;
      width: 100%;
      background-color: rgba(0, 0, 0, 0.85);
      padding: 20px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      transition: top 0.5s ease-in-out;
      z-index: 2;
    }

.barra-lateral.mostrar {
      top: 120px;
    }

.modulo-btn {
      background-color: black;
      color: white;
      border: 0px;
      padding: 12.5px 25px;
      font-size: 9px; 
      cursor: pointer;
      border-radius: 0px;
      transition: all 0.5s ease-in-out;
      text-size: 10px; /* Aumentamos el tamaño del texto */
    
    }

.modulo-btn:hover,
    .modulo-btn.active {
      background-color: white;
  
      color: black;
    }
  </style>
</head>
<body>

<div class="titulo">Curso HTML</div>
  <div class="barra lateral" r>
   <div class="barra-lateral" id="barraModulos">
    
    <button class="modulo-btn">Módulo 1</button><button class="modulo-btn">Módulo 2</button><button class="modulo-btn">Módulo 3</button><button class="modulo-btn">Módulo 4</button><button class="modulo-btn">Módulo 5</button><button class="modulo-btn">Módulo 6</button><button class="modulo-btn">Módulo 7</button>
    </div>

<div class="barra-lateral" id="barraModulos">
  
  <script>
    function mostrarBarra() {
      document.getElementById("barraModulos").classList.toggle("mostrar");
    }
  </script>

</body>
</html>

CSS