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

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    height: 60px;
    padding-left: 20px;

    background: white;
    box-shadow: 0 2px 20px rgba(1, 41, 112, 0.1);

    display: flex;
    align-items: center;

    z-index: 1000;
}

/* Sidebar */
aside {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;

    width: 200px;

    padding: 20px;

    overflow-y: auto;

    background: white;
    box-shadow: 0 0 20px rgba(1, 41, 112, 0.1);

    z-index: 996;
}

/* Contenedor principal */
main {
    position: fixed;

    top: 60px;
    right: 0;
    bottom: 0;
    left: 200px;

    margin: 0;
    padding: 0;

    overflow: hidden;

    background-color: whitesmoke;
}

/* Iframe */
.full-screen-iframe {
    display: block;

    width: 100%;
    height: 100%;

    margin: 0;
    padding: 0;

    border: none;
}