body {
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.contenedor-app{
    background-color: white;
    width: 100%;
    max-width: 400px;
    padding: 30px;
    border-radius: 12px;
    box-shadow:0 10px 25px rgba(0,0,0,0.1);
}

h1{
    text-align: center;
    color: #333;
    margin-top: 0;
} 

.input-grupo {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
} 

#input-tarea {
    flex-grow: 1;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
}

#input-tarea:focus{
    border-color: #3CAF50;
}

#btn-agregar {
    padding: 12px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

#btn-agregar:hover{
    background-color: #45a049;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}


.tarea {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 6px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.tarea:hover {
    background-color: #f1f1f1;
}

.tarea.completada .texto {
    text-decoration: line-through;
    color: #888;

}

.btn-borrar {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0.5;
    transition: opacity 0.3s;
}

.btn-borrar:hover {
    opacity: 1;
}