* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    height: 100%;
}

body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    flex-direction: column; 
    min-height: 100vh;
}

.linear {
    margin: 0;
    height: 100px;
    width: 100vw; 
    background-image: linear-gradient(225deg, rgb(182, 222, 247), rgb(99, 193, 251), DodgerBlue);
    text-align: center;
}

h1 {
    margin: 0;

}

h1.Titulo {
    margin: 0;
    font-size: 60px;
    text-decoration: underline;
}

h2 {
    font-size: 15px;
}

h3 {
    margin: 10px;
    padding-left: 0;
    font-size: 30px;
}

h4.Publicitat {
    margin: 0;
    padding: 0;
    font-size: 25px;
    text-align: left;
}

p {
    margin: 5px;
}

/* Enlaces globales */
a:link, a:visited {
    color: #2c72ff !important;      
    text-decoration: none;           
    transition: color 0.3s ease;     
}

a:hover, a:active {
    color: #ffffff !important;        
    text-decoration: underline;       
}

nav {
    width: 100%;
    padding: 5px 20px;
    display: flex;
    align-items: center;
    height: 40px;
    background-image: linear-gradient(225deg, rgb(29, 28, 28), rgb(59, 59, 59));
    color: white;
}

nav select {
    display: inline;
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 5px;
    font-family: 'Poppins', sans-serif;
}

nav ul {
    display: flex;
    padding: 0;
    margin: 0;
}

nav ul li {
    list-style: none;
    margin-right: 25px; 
    color: white;
    font-weight: 600;
}

.contenido-principal {
    display: flex;
    width: 100%;
    flex: 1; 
    align-items: stretch; 
}


main {
    width: 75%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; 
    flex: 1;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    z-index: 1000;
    text-decoration: none;
    font-weight: bold;
    transition: top 0.3s;
}

aside {
    width: 25%;
    background-color: #0288d1;
    color: white;
    padding: 15px;
    box-sizing: border-box;
    background-image: linear-gradient(225deg, rgb(147, 205, 241), rgb(77, 182, 247), DodgerBlue);
}

.Publicitat {
    display: flex;
    justify-content: center;
    align-items: center;     
    margin: 15px auto;
}

.aboutme {
    width: 27.75vw;         
    height: auto;          
    display: block;        
    margin: 0 auto;        
}

#examinator {
    width: 88px;
    height: 31px;
}

footer {
    background-image: linear-gradient(225deg, rgb(29, 28, 28), rgb(59, 59, 59));
    width: 100%;
    color: white;
    text-align: center;
    padding: 10px 0;
    font-weight: 600;
}

/* --- MENÚ DESPLEGABLE --- */

nav ul li {
    position: relative;
    list-style: none;
    margin-right: 25px;
    color: white;
    font-weight: 600;
    cursor: pointer;
}


nav ul li ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: rgb(59, 59, 59);
    border-radius: 5px;
    padding: 5px 0;
    min-width: 160px;
    z-index: 1000;
}

nav ul li ul li {
    color: white;
    padding: 8px 15px;
    margin: 0;
    white-space: nowrap;
}


nav ul li:hover > ul {
    display: block;
}


nav ul li ul li:hover {
    background-color: rgb(90, 90, 90);
}