/* ---------------------------------------------------------
   GLOBAL
--------------------------------------------------------- */

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-image: url("hintergkn.png");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #000;
}

/* ---------------------------------------------------------
   NAVIGATION – Marmor-Dunkelgrau, glänzend, zentriert
--------------------------------------------------------- */

.main-nav {
    background: linear-gradient(135deg, #2f2f2f, #4a4a4a);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;

    display: flex;
    justify-content: center;      /* ZENTRIERTE NAVIGATION */
    align-items: center;
}

.main-nav li {
    margin: 0;
}

.main-nav a {
    display: block;
    padding: 14px 20px;
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
}

.main-nav a:hover {
    background-color: rgba(255,255,255,0.15);
}

/* ---------------------------------------------------------
   PAGE WRAPPER – Cremeweiß, Opazität 0.9, schmal
--------------------------------------------------------- */

.page-wrapper {
    max-width: 650px;             /* wissenschaftlich schmale Breite */
    margin: 30px auto;
    padding: 24px;
    background-color: rgba(255, 248, 230, 0.9);
    box-shadow: 0 4px 10px rgba(0,0,0,0.25);
    border-radius: 4px;
}

/* ---------------------------------------------------------
   TEXT & BILDER
--------------------------------------------------------- */

.page-wrapper img {
    width: 100%;                  /* exakt Textbreite */
    height: auto;
    margin: 20px 0;
    display: block;
}

/* ---------------------------------------------------------
   RESPONSIVE DESIGN – unter 600px Navigation vertikal
--------------------------------------------------------- */

@media (max-width: 600px) {

    .main-nav ul {
        flex-direction: column;   /* vertikal */
        justify-content: center;  /* weiterhin zentriert */
    }

    .main-nav a {
        border-top: 1px solid rgba(255,255,255,0.2);
        text-align: center;       /* Text ebenfalls zentriert */
    }

    .page-wrapper {
        max-width: 90%;           /* flexible Breite */
        margin: 15px auto;
        padding: 18px;
    }
}

.back-to-top {
    background-color: #2f2f2f; /* oder deine Nav-Farbe */
    color: white;
    padding: 8px 14px;
    border-radius: 6px;
    text-decoration: none;
}
.back-to-top:hover {
    background-color: #3399ff;
}

.supersmall {
  font-size: 0.7em;
  vertical-align: super;
}