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

html {
    scroll-behavior: smooth;
}

header{margin: 0;
    padding: 0;
    width: 100%;
}
body{
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #1D3557, #b6b3b3);
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment:fixed;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif
}
h1, h2, h3 {
    font-family: 'Alumni Sans Pinstripe', sans-serif;
    
}
h1 {
    color: white;
    font-size:5rem;
    font-weight: 6000;
}


#menu { 
    display: flex;
    flex-direction:column; /* para que el menu se vea en vertical */
    align-items:center;
    color: white;
}

header nav{
    display:flex;
    flex-direction: column;
    text-align: center;
    gap: 10px;
}

nav button a { 
    color:#000000;
    text-decoration: none;
    font-family: 'Poppins', sans-serif;
}

.boton {
    display: inline-block;
    padding: 4px 20px;
    font-size: 20px;
    background-color: #B2C1D6	; 
    font-weight: bold;
    box-shadow: #FFEECD 0px 0px 5px 2px;
    border-radius:20px;
}

.boton:hover {
    background-color:#577296; 
}
.boton:active {
    background-color: #6177EB; 
}

h2{
    color: white ;
    font-size: 50px;
    text-align: center;
    margin-top: 40px;
    font-weight: 600;
    margin-bottom: 20px;
}
#tablamaterias {
    color: white ;
    font-size: 20px;
    text-align: center;
}
table {
    border-collapse: collapse;
    width: 100%;
}

th, td {
    padding: 10px;
    text-align: center;
    border: 1px solid #ffffff;
}
th {
    background-color: rgba(4, 4, 4, 0.441);
    color: #ffffff;
    font-weight:lighter
}
/*FINAL DE HOME*/
/*COMIENZO PARA EL FOOTER*/
footer  {
    background-color: rgba(4, 4, 4, 0.441); /* gris leve con transparencia */
    color: white;
    width: 100%;
    font-size: 15px;
    bottom:0;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
}


/*ESTILO PARA AVISOS*/
.avisos {padding: 0 ;
    margin: 0;
    display: flex;
    flex-direction: center;
    text-align: center;
    justify-content: center;
    width: 100%;
    color: white;
    gap: 70px;
}
ul {
    justify-content: center;
    text-align: center;
}

ul li a {
    text-decoration:none;
    color:#57431D
}

.section {
    font-family:'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 33px;
    align-items: center;
}


/*ESTILO PARA SOBRE MI*/
#leo {
    text-align: start;
    padding-left: 30px;
}
#contenidoimg {
    display: flex;
}
#contenidoimg #imgsobremi {
    display: flex;
    height: 200px;
    width: 200px;
}
#contenidoimg #contenidotextosobremi {
    width: 50%;
    padding-right: 40px;
    text-align: justify;
}
#contenidotextosobremi p{
    color: white;
    font-size: 20px;
    color: white;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif
}


/*ESTILO PARA MATERIAS2025*/
.materias {margin-top: 10px;
    padding: 0;
    display: flex;
    flex-direction: center;
    text-align: center;
    justify-content: center;
    width: 100%;
    color: white;
    font-size: 30px;
}
#botondiseño {padding: 10px 60px ;
    font-size: 20px;
    background-color: #B2C1D6;
    color: #ffffff;
    font-weight: bold;
    box-shadow: #ffffff 0px 0px 5px 2px;
    list-style: none;
    border-radius: 20px;

}
ul {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

}
ul button a { 
    color:#000000;
    text-decoration: none;
}
#botondiseño:hover {
    background-color:#577296
}

#botondiseño:active {
    background-color: #6177EB;
}

#formulario {
    color: white;
    width: 100;            
    height: 70%;          
    padding: 40px;
    display: flex;
    justify-content: center;
    font-size: 40px;
    font-weight:100;
}

/*ESTILO PARA DISEÑO Y DESARROLLO WEB*/
h3  {
    color: white;
    font-size: 30px;
    margin-top: 35px;
    padding: right 30px;
}
#diseñofecha {
    padding-left: 30px;
}
#parciales {
    text-align: justify;
}

#examenes div p{
    display: flex;
    font-size: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#examenes {color: white;
    font-size: 20px;
    text-align: start;
    margin-top: 35px;
    width: 40%;
    justify-content: center;
}
#actividades h3 {
    display: flex;
    
}
#actividades{ color: white;
    font-size: 20px;
    display: flex;
    flex-direction:row-reverse;
}

section h3 p{
    text-align: start;
    padding-left: 50px;
}

#biblio div{display: flex;
    flex-direction: column;
    color: white;
    font-size: 20px;
    text-align: start;
    margin-top: 35px;
}


/*contacto*/
form {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}
input, textarea {
    width: 80%;
    padding: 5px;
    margin: 10px 0;
}
label {
    color: white;
    font-size: 25px;
    font-weight: bold;
}
input {
    border: 2px solid #ffffff;
    border-radius: 5px;
    color: #000000;
    font-size: 20px;
}
.btn{
    background-color: #778496;
    color: #000000;
    font-weight: bold;
    box-shadow: #FFEECD 0px 0px 5px 2px;
    border-radius:20px;
    padding: 10px 20px;
    border: none;
}
.btn:hover {
    background-color: #6177EB;
    color: #ffffff;
}
.btn:active {
    background-color: #4B5A7F;
    color: #ffffff;
}

/*Responsive */
@media (min-width:720px) {
        h1{
        font-size: 5rem;
        align-items: center;
    }
    #menu { 
        flex-direction:column;
        align-items: center;
        justify-content: space-between
    }
    header nav {
        flex-direction: row;
        justify-content: center;
        padding-bottom: 0;
    }
    #imgsobremi{
        width:500px;
    }
    
    #contenidoimg #contenidotextosobremi {
        width: 50%;
        padding: 0px 30px ;
        display: flex;
        flex-direction: row;
    }
    footer {position:fixed;
        bottom: 0;
    }

    #parrafo, #parrafo3 {
    padding: 5px 0;
    align-items: center;
    text-align: center;
}

}