body {
    font-family: Arial, sans-serif;
    margin: 0; padding: 0;
    background: #f9f9f9;
    min-height: 100vh;
    position: relative;
}
.header {
    text-align: center;
    background: #fff;
    padding: 30px 10px 10px 10px;
    border-bottom: 1px solid #eee;
}
.logo {
    width: 64px;
    height: 64px;
    display: block;
    margin: 0 auto 8px auto;
}
h1 {
    margin: 0;
    font-size: 2em;
    color: #333;
}
.menu-principal {
    display: flex; gap: 20px; padding: 14px 5vw; background: #f7f7fb; align-items: center;
    border-bottom: 1px solid #eee;
}
.menu-principal a { color: #2176ae; text-decoration: none; margin-right: 12px; font-weight: bold; }
.submenu-categorias { position: relative; }
.submenu-categorias span { cursor: pointer; color: #2176ae; font-weight: bold;}
.submenu-lista {
    display: none; position: absolute; left: 0; top: 22px; background: #fff; border: 1px solid #ccc;
    box-shadow: 0 2px 8px #eee; padding: 6px 0; z-index: 10; min-width: 120px;
}
.submenu-categorias:hover .submenu-lista { display: block; }
.submenu-lista a { display: block; padding: 8px 14px; color: #2176ae; white-space: nowrap; }
.submenu-lista a:hover { background: #f1f7fb; }
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 5vw;
    background: #fff;
    border-bottom: 1px solid #eee;
}
.search-form input {
    padding: 5px 8px;
    font-size: 1em;
}
.search-form button {
    padding: 5px 12px;
    font-size: 1em;
    background: #2176ae;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
.btn-acceder {
    background: #2176ae;
    color: #fff;
    padding: 7px 18px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
}
.registros {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    padding: 30px 5vw 100px 5vw;
}
.registro-bloque {
    background: #fff;
    width: 320px;
    border-radius: 8px;
    box-shadow: 0 2px 8px #ddd;
    padding: 20px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}
.registro-bloque:hover {
    box-shadow: 0 4px 24px #bbb;
}
.registro-bloque h2 {
    font-size: 1.3em;
    margin: 0 0 10px 0;
    color: #2176ae;
}
.img-bloque {
    max-width: 100%;
    max-height: 120px;
    object-fit: contain;
    margin-bottom: 12px;
    border-radius: 6px;
    background: #fafafa;
}
.fecha {
    margin-top: 10px;
    font-size: 0.95em;
    color: #777;
}
.cat-nombre {font-size: 1em; font-weight: bold; color: #2176ae; margin-bottom: 5px;}
.leer-mas { color:#2176ae; text-decoration: underline; font-weight:bold;}
footer {
    position: fixed;
    width: 100%;
    bottom: 0;
    left: 0;
    text-align: center;
    padding: 16px 0 8px 0;
    background: #fff;
    border-top: 1px solid #eee;
    font-size: 1.1em;
    z-index: 99;
}
footer a {
    color: #2176ae;
    text-decoration: none;
    font-weight: bold;
}
@media (max-width:600px) {
    .registros {flex-direction: column; align-items: center;}
    .registro-bloque {width: 98vw;}
}