/* Grundgerüst */
body {
    background: url('Uploads/hintergrund.jpg') no-repeat center center fixed;
    background-size: cover;
    background-color: #050a10;
    font-family: 'Inter', sans-serif;
    color: #ffffff;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Container für alles */
.master-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: 20px;
    padding: 40px;
    max-width: 1200px;
    margin: auto;
    position: relative;
    z-index: 1;
}

/* Header Bereich */
.header-box { 
    grid-column: 1 / 4; 
    text-align: center; 
    margin-bottom: 20px; 
}

.main-logo { 
    height: 180px; 
    background: white; 
    padding: 10px; 
    border-radius: 50%; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.header-text { 
    color: #ffffff; 
    text-shadow: 0 2px 4px rgba(0,0,0,0.8); 
    margin: 5px 0;
}

/* Kacheln */
.card, .center-card {
    background: rgba(0, 40, 80, 0.85);
    border: 1px solid #4a90e2;
    padding: 25px;
    border-radius: 15px;
    color: #ffffff;
}

.card h3 { 
    color: #4da6ff; 
    border-bottom: 2px solid #4a90e2; 
    padding-bottom: 10px; 
    margin-top: 0; 
}

.card ul { 
    list-style: disc; 
    padding-left: 20px; 
}

/* Center Box */
.center-card { text-align: center; }

.btn {
    display: inline-block;
    background: #4a90e2;
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 8px;
    margin-top: 20px;
    font-weight: bold;
    border: 1px solid white;
}

/* Mobil-Optimierung */
@media (max-width: 768px) {
    .master-layout { grid-template-columns: 1fr; }
    .header-box { grid-column: 1; }
}