/* Grundlegende Styles */
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #7f8c8d;
            --accent-color: #c0392b;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header & Navigation */
        header {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            display: flex;
            align-items: center;
        }
        
        .logo span {
            color: var(--accent-color);
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav li {
            margin-left: 1.5rem;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        nav a:hover {
            color: var(--accent-color);
        }
        
        /* Hero Bereich */
        .hero {
            background: linear-gradient(rgba(44, 62, 80, 0.5), rgba(44, 62, 80, 0.4)),
			url('./bilder/Pershing I-SW.jpg');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 4rem 0;
            text-align: center;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            font-weight: 300;
        }
        
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        
        .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            text-decoration: none;
            font-weight: bold;
            transition: background-color 0.3s;
            margin: 0.5rem;
        }
        
        .cta-button:hover {
            background-color: #a93226;
        }
        
        /* Buchvorstellung */
        .book-section {
            padding: 4rem 0;
            background-color: white;
        }
        
        .book-container {
            display: flex;
            flex-wrap: wrap;
            gap: 3rem;
            align-items: flex-start;
        }
        
        .book-cover {
            flex: 0 0 300px;
             /* box-shadow: 0 10px 30px rgba(0,0,0,0.2); /* 
            border-radius: 4px;
             /* overflow: hidden;  /* 
        }
        
		.book-cover img {
			width: 100%;
			height: auto;
			display: block;
			max-height: 500px; /* Optional: maximale Höhe festlegen */
			object-fit: contain; /* Stellt sicher, dass das ganze Bild sichtbar ist */
	}
        
        .book-info {
            flex: 1;
            min-width: 300px;
        }
        
        .book-info h2 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            font-size: 2rem;
        }
        
        .book-subtitle {
            color: var(--secondary-color);
            font-style: italic;
            margin-bottom: 1.5rem;
        }
        
        .book-description {
            margin-bottom: 2rem;
        }
        
        /* Kaufoptionen */
        .purchase-options {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
        }
        
        .purchase-btn {
            display: inline-block;
            padding: 0.7rem 1.5rem;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            text-decoration: none;
            border-radius: 4px;
            font-weight: bold;
            transition: all 0.3s;
        }
        
        .purchase-btn:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        .purchase-btn.accent {
            background-color: var(--accent-color);
            color: white;
            border-color: var(--accent-color);
        }
        
        .purchase-btn.accent:hover {
            background-color: #a93226;
        }
        
        /* Themenbereiche */
        .topics-section {
            padding: 4rem 0;
            background-color: var(--light-color);
        }
        
        .section-title {
            text-align: center;
            color: var(--primary-color);
            margin-bottom: 3rem;
            font-size: 2rem;
        }
        
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }
        
        .topic-card {
            background-color: white;
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        
        .topic-img {
            height: 180px;
            background-color: #ddd;
            background-size: cover;
            background-position: center;
			border-bottom: 1px solid black; 
        }
        
        .topic-content {
            padding: 1.5rem;
        }
        
        .topic-content h3 {
			color: #007F46;
            margin-bottom: 0.8rem;
        }
		
		.topic-content p {
            color: var(--primary-color);
            margin-bottom: 0.8rem;
        }
        
        /* Autor */
        .author-section {
            padding: 4rem 0;
            background-color: white;
        }
        
        .author-container {
            display: flex;
            flex-wrap: wrap;
            gap: 3rem;
            align-items: center;
        }
        
        .author-photo {
            flex: 0 0 250px;
        }
        
        .author-photo img {
            width: 100%;
            height: auto;
            border-radius: 50%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .author-info {
            flex: 1;
            min-width: 300px;
        }
        
        /* Footer */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .footer-column {
            flex: 1;
            min-width: 200px;
        }
        
        .footer-column h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: var(--accent-color);
        }
        
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        
        /* Responsive Anpassungen */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 1rem;
                justify-content: center;
            }
            
            nav li {
                margin: 0 0.7rem;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .book-container, .author-container {
                flex-direction: column;
                align-items: center;
            }
        }
		
		.lizenz {
		    font-size: 0.7rem;
			padding-left: 0.7rem;
			}
			
       /* Hauptinhalt */
        .content-area {
            padding: 2rem 2.5rem 3rem 2.5rem;
        }

        .intro-text {
            border-left: 4px solid #8b0000;
            background-color: #f9f7f5;
            padding: 1.5rem 2rem;
            margin-bottom: 2.5rem;
            font-size: 1.1rem;
            font-style: normal;
        }

        .intro-text p {
            margin-bottom: 0.5rem;
        }

        .intro-text .image-credit {
            font-size: 0.85rem;
            color: #6f6f6f;
            font-family: 'Segoe UI', Arial, sans-serif;
            margin-top: 0.8rem;
        }

        .thumbnail-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem 1.5rem;
            margin-top: 1.5rem;
        }

        .thumb-card {
            cursor: pointer;
            transition: transform 0.2s ease, opacity 0.2s;
            border-bottom: 1px solid #ddd;   /* dezente Linie, wie auf maxbold.de bei Themen */
            padding-bottom: 0.8rem;
        }

        .thumb-card:hover {
            transform: translateY(-4px);
            opacity: 0.9;
        }

        .thumb-frame {
            background-color: #e8e6e4;   /* alter Papier-ton */
            border: 1px solid #c0b9b0;
            padding: 0.5rem 0.5rem 0.3rem 0.5rem;
            box-shadow: 0 3px 6px rgba(0,0,0,0.05);
            margin-bottom: 0.6rem;
        }

        .thumb-img {
            width: 100%;
            height: auto;
            aspect-ratio: 4 / 3;          
            object-fit: cover;
            background-color: #d6d2cd;
            display: block;
            filter: grayscale(0.2) contrast(0.95); 
            border: 1px solid #aaa49c;
        }

        .thumb-caption {
            font-size: 0.9rem;
            line-height: 1.35;
            color: #2e2e2e;
            font-family: 'Segoe UI', Arial, sans-serif;
            font-weight: 400;
            padding: 0 0.2rem;
        }

        .thumb-caption strong {
            font-family: 'Segoe UI', Arial, sans-serif;
            font-weight: 600;
            color: #1a3a5e;      
        }

        .modal-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background-color: rgba(10, 10, 10, 0.88);
            justify-content: center;
            align-items: center;
            z-index: 9999;
            backdrop-filter: blur(3px);
            padding: 2rem;
        }

        .modal-content {
            background-color: #ffffff;
            max-width: 1000px;
            width: fit-content;
            max-height: 90vh;
            display: flex;
            flex-direction: column;
            box-shadow: 0 20px 30px rgba(0,0,0,0.6);
            border: 1px solid #645e56;
        }

        .modal-image-container {
            padding: 1.5rem 1.5rem 0.5rem 1.5rem;
            background-color: #2b2b2b;    
            text-align: center;
        }

        .modal-image-container img {
            max-width: 100%;
            max-height: 70vh;
            object-fit: contain;
            display: inline-block;
            border: 1px solid #7a6f64;
        }

        .modal-footer {
            background-color: #eae3db;     
            padding: 1rem 2rem 1.5rem 2rem;
            border-top: 1px solid #bcb2a7;
            font-family: 'Segoe UI', Arial, sans-serif;
        }

        .modal-footer .modal-caption {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: #2c2c2c;
            font-weight: 500;
        }

        .modal-footer .modal-subline {
            font-size: 0.85rem;
            color: #5c534b;
            letter-spacing: 0.3px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-close-btn {
            background: none;
            border: 1px solid #6b4f3f;
            padding: 0.3rem 1.2rem;
            font-size: 0.9rem;
            cursor: pointer;
            background-color: #d6cbbc;
            color: #1f1f1f;
            transition: all 0.1s;
            font-family: 'Segoe UI', Arial, sans-serif;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .modal-close-btn:hover {
            background-color: #b8a68f;
            border-color: #3a2e26;
            color: #000;
        }

        /* schlichter Footer der Seite */
        .site-footer {
            background-color: #e0dbd5;
            padding: 1.2rem 2.5rem;
            font-size: 0.85rem;
            color: #4b4440;
            font-family: 'Segoe UI', Arial, sans-serif;
            border-top: 1px solid #c4bbb0;
        }

        /* Responsive Anpassungen */
        @media (max-width: 900px) {
            .thumbnail-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.5rem;
            }
        }

        @media (max-width: 600px) {
            .thumbnail-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-area { padding: 1.5rem; }
            .site-header h1 { font-size: 1.8rem; }
        }