body {
    margin: 0;font-family: Arial, sans-serif;
}
 
/* Sidebar und Inhalt */
.container {
    display: flex;
}
 
/* Linke Seitenleiste */
 
.sidebar {
    width: 250px;
    height: 100vh;
    background: #0B2E59;
    color: white;
    padding: 20px;
 
    position: sticky;
    top: 0;
}
 
 
.sidebar h2 {
    color: white;
}
 
.sidebar ul {
    list-style: none;
    padding: 0;
}
 
.sidebar li {
    margin: 15px 0;
}
 
.sidebar a {
    color: white;
    text-decoration: none;
}
 
.sidebar a:hover {
    color: lightgreen;
}
 
/* Hauptinhalt */
 
.content {
    flex: 1;
    padding: 40px;
}
 
.content h1 {
    text-align: center;
}
 
/* Hellblaue Boxen */
 
.info-box {
    background: #DCEEFF;
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
    overflow: auto;
}
 
.info-box h2 {
    margin-top: 0;
}
 
.hero {
    position: relative;
 
    height: 100vh;
    width: 100%;
 
    background-image: url("images/hintergrund01.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
 
    color: white;
}
 
/* Überschrift im Bild */
 
.hero-text {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}
 
.hero h1 {
    margin: 0;
    line-height: 1;
    font-size: clamp(3rem, 8vw, 7rem);
    text-shadow: 4px 4px 16px black;
}
 
.hero h2 {
    margin-top: 15px;
    font-size: clamp(1rem, 2vw, 2rem);
    font-weight: normal;
    text-shadow: 4px 4px 16px black;
}
 
.hero-link {
    position: absolute;
    bottom: 2vh;
    left: 2vw;
}
 
.hero-link a {
    color: white;
    background: rgba(0, 0, 0, 0.6);
 
    padding: clamp(8px, 1vw, 14px) clamp(12px, 1.5vw, 20px);
    font-size: clamp(0.8rem, 1vw, 1.2rem);
 
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}
 
.hero-link a:hover {
    text-decoration: underline;
}

.dropdown-item {
    color: black !important;
}

.dropdown-item:hover {
    background-color: #adc8e8 !important;
    color: black !important;
}

/* Pfeil zeigt nach rechts, wenn Dropdown geschlossen ist */
.dropdown-toggle::after {
    transform: rotate(-90deg);
    transition: transform 0.2s ease;
}

/* Pfeil zeigt nach unten, wenn Dropdown geöffnet ist */
.dropdown-toggle[aria-expanded="true"]::after {
    transform: rotate(0deg);
}

#teleportBtn {
    background: linear-gradient(135deg, #0B2E59, #1E5AA8);
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 18px;
    font-weight: bold;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
    position: fixed;
    bottom: 25px;
    right: 25px;
}


#teleportBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
    background: linear-gradient(135deg, #1E5AA8, #2C7BE5);
}

#teleportBtn:active {
    transform: translateY(1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

#zurueckBtn {
    background: linear-gradient(135deg, #0B2E59, #1E5AA8);
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 18px;
    font-weight: bold;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
    position: fixed;
    bottom: 25px;
    right: 25px;
}


#zurueckBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
    background: linear-gradient(135deg, #1E5AA8, #2C7BE5);
}

#zurueckBtn:active {
    transform: translateY(1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.video-container {
    width: 950px;
    padding: 20px;

    margin: 80px auto;

    background: linear-gradient(135deg, #0B2E59, #1E5AA8);

    border-radius: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

    overflow: hidden;
}

.video-container iframe {
    width: 100%;
    height: 535px;

    border: none;
    border-radius: 20px;
    display: block;
}

.fazit-bild {
    width: 200px;
    float: right;
    margin: 20px 0 20px 20px;
    border-radius: 10px;
}

/* ==========================
   KI Rechner Popup
   ========================== */
 
 
.popup {
 
    display: none;
 
    position: fixed;
 
    z-index: 1000;
 
    left: 0;
    top: 0;
 
    width: 100%;
    height: 100%;
 
    background: rgba(0, 0, 0, 0.65);
 
    justify-content: center;
    align-items: center;
 
}
 
 
/* Weiße Rechner-Box */
 
.popup-inhalt {
 
    background: white;
 
    width: 90%;
    max-width: 500px;
 
    padding: 30px;
 
    border-radius: 15px;
 
    text-align: center;
 
    color: black;
 
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
 
}
 
 
/* Slider */
 
.popup-inhalt input {
 
    width: 100%;
 
}
 
 
/* Schließen-X */
 
.schliessen {
 
    float: right;
 
    border: none;
 
    background: none;
 
    font-size: 30px;
 
    cursor: pointer;
 
    color: black;
 
}
 
 
.schliessen:hover {
 
    color: red;
 
}

#hochBtn {
    position: fixed;

    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);

    width: 55px;
    height: 55px;

    background: linear-gradient(135deg, #0B2E59, #1E5AA8);
    color: white;

    border: none;
    border-radius: 50%;

    font-size: 32px;
    font-weight: bold;

    cursor: pointer;

    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);

    transition: all 0.3s ease;

    display: none;

}

/* Hover Effekt */
#hochBtn:hover {
    transform: translateX(-50%) translateY(-5px) scale(1.1);

    background: linear-gradient(135deg, #1E5AA8, #2C7BE5);

    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.45);
}


/* Klick Effekt */
#hochBtn:active {
    transform: translateY(0) scale(0.95);
}

.hover-bild {
    transition: all 0.2s ease;
}

.hover-bild:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}