* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #ffffff;
    font-family: Times New Roman, serif;
}

.encabezado {
    background-color: #0d1527;
    padding: 15px 20px;
    text-align: left;
}

.btn-atras {
    display: inline-block;
    padding: 8px 18px;
    background-color: #3b82f6;
    color: #ffffff;
    text-decoration: none;
    border-radius: 20px;
    font-size: 14px;
    font-family: sans-serif;
    font-weight: bold;
    transition: background-color 0.2s ease;
}

.btn-atras:hover {
    background-color: #2563eb;
}

.nav-verde {
    background-color: #3cae81;
    display: flex;
    padding: 5px 20px;
    gap: 15px;
}

.nav-verde a {
    color: #ffffff;
    text-decoration: none;
    font-size: 16px;
    padding-right: 15px;
    border-right: 1px solid rgba(255, 255, 255, 0.6);
}

.nav-verde a:last-child {
    border-right: none;
}

.contenedor-principal {
    border: 12px solid #7c7c7c;
    margin: 20px;
    padding: 40px;
    min-height: 70vh;
}

.contenedor-principal h1 {
    font-size: 2.8rem;
    font-weight: bold;
    margin-bottom: 20px;
    color: #000000;
}

.contenedor-principal p {
    font-size: 1.1rem;
    color: #000000;
}