body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #004080;
    color: white;
    padding: 0.6em 1.5em;
    width: 100%;
    box-sizing: border-box;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.logo img {
    height: 50px;
    width: auto;
}

.titulo h1 {
    font-size: 1.8em;
    margin: 0;
    color: #004080; /* mismo color que el fondo de la cabecera para que no se vea */
    font-family: Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
}

.menu {
    position: relative;
}

#btnMenu {
    background-color: transparent;
    border: none;
    color: white;
    font-size: 1.1em;
    cursor: pointer;
    font-family: Arial, sans-serif;
    padding: 0.3em 0.5em;
}

#btnMenu:focus {
    outline: 2px solid #7fb7ff;
}

.dropdown-menu {
    position: absolute;
    top: 120%;
    right: 0;
    background-color: white;
    border-radius: 4px;
    list-style: none;
    padding: 0.5em 0;
    margin: 0;
    min-width: 140px;
    display: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    z-index: 100;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu li a {
    display: block;
    padding: 0.5em 1em;
    color: black;
    text-decoration: none;
    font-size: 1em;
}

.dropdown-menu li a:hover,
.dropdown-menu li a:focus {
    background-color: #7fb7ff;
    color: white;
    outline: none;
}

main {
    padding: 1em;
}

/* CENTRADO DE TEXTOS Y CONTENIDO */
.contenido-principal {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 2em 1em;
}

.contenido-principal h2 {
    font-family: Candara, Calibri, Segoe, "Segoe UI", Optima, Arial, sans-serif;
    font-size: 2.5em;
    margin-bottom: 0.5em;
    color: #3a6b3a;
}

/* SLIDER */
.slider {
    position: relative;
    width: 900px;
    height: 506.25px;
    margin: 2em auto;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;    
    height: 100%;   
    opacity: 0;
    object-fit: cover;
    transition: opacity 1s ease-in-out;
    border-radius: 12px;
    border: 5px solid #004080; 
    box-sizing: border-box;
}

.slide.visible {
    opacity: 1;
    z-index: 1;
}

footer {
    text-align: center;
    padding: 1em;
    background-color: #eee;
    margin-top: 2em;
}