body {
    margin: 0;
    padding-top: 110px; 
    font-family: Verdana, Helvetica, Sans-Serif;
    font-size: 14px;
    color: #ffffff;
    background-image: url("fotos/fisicas_1.png");
    background-position: center;
    background-repeat: repeat;
    background-attachment: fixed;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 25px;
    box-sizing: border-box;
    z-index: 1000;
    background: transparent;
}

header img {
    width: 120px;
    height: auto;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
    color: #ffffff;
    display: flex;
    align-items: flex-start;
}

/* Estilo superíndice  */
header h1 sup, 
header h1 .subtitulo {
    font-size: 0.4em;
    position: relative;
    top: 0.25em; 
    margin-left: 8px;
    font-weight: normal;
}

a { 
    color: #ffffff; 
    text-decoration: none; 
}
a:hover { 
    color: #4492dc; 
    text-decoration: underline; 
}
a:active { 
    color: #d00000; 
}

main, center { 
    display: flex;
    flex-direction: column;
    align-items: center;
}

table { 
    margin-bottom: 30px; 
    border-collapse: collapse; 
    background: transparent;
}

th { 
    padding: 8px; 
    border: 2px solid #999999; 
    vertical-align: top; 
    background-color: rgba(255, 255, 255, 0.24);
}

td { 
    padding: 10px; 
    border: 2px dotted #999999; 
    vertical-align: top; 
    text-align: center; 
    background-color: rgba(255, 255, 255, 0.08);
}

.seccion-titulo {
    vertical-align: bottom; 
    border: 0px; 
    padding: 0 0 2px 0; 
    text-align: center;
    font-weight: bold;
    font-size: 1.1em;
}

.tabla-fotos {
    width: 80% ;
}

.tabla-fotos td, .tabla-fotos th {
    width: 50% ;
    border: 0px ;
    background: transparent ;
    text-align: center;
    vertical-align: middle;
}

.tabla-limpia td, .tabla-limpia th {
    border: 0px ;
    background: transparent ;
    text-align: center;
    vertical-align: middle; 
}

.foto-h { /* Horizontales */
    width=100%; 
}

.foto-v { /* Verticales */
    height=100%; 
}

.cita-final {
    margin-top: 30px;
    text-align: center;
    font-weight: bold;
    padding: 15px;
    border: 2px solid #999999;
    background-color: rgba(255, 255, 255, 0.24); /* El sombreado de los th */
    display: inline-block; 
    max-width: 80%;
}

.cita-final span {
    display: block;
    margin-top: 2px; /* Más cerca de la frase */
    font-weight: normal; /* Para que el autor no resalte tanto como la frase */
}

p { 
    margin: 10px 0; 
}