/* Main Content */
        .main-content {
            padding: 40px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .youtube-list {
            max-width: 1100px;
            margin: 0 auto;
            background-color: #f9f9f9;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        /* Added h3 styling for main content heading */
        .youtube-list h3 {
            font-size: 1.5em;
            color: #333;
            margin-bottom: 20px;
            text-align: center;
            border-bottom: 2px solid #d4691a;
            padding-bottom: 10px;
        }
        
        .tour-date {
            font-size: 1.2em;
            color: #d4691a;
            font-weight: bold;
            margin-bottom: 20px;
        }

       /* Main visual */
        #main-visual {
            height: 400px;
            display: flex;
            justify-content: center;
            align-items: center;
            background-image: url(https://www.yokogawa-distillery.com/images/yokogawa_02_1_2_800400.jpg);
            background-size: cover;
            background-position: center;
            width: 100%;
        }
        
        #main-visual h2 {
            font-size: 180%;
            color: #fff;
            font-family: "Times New Roman", "YuMincho", "Hiragino Mincho ProN", "Yu Mincho", "MS PMincho", serif;
        }
        
        h3 {
            font-size: 200%;
            margin-bottom: .7em;
        }

        /* Added YouTube channel button styles */
        .channel-button-section {
            text-align: center;
            margin: 50px 0;
            padding: 30px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 12px;
        }

        .channel-button {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: #FF0000;
            color: white;
            padding: 15px 30px;
            border-radius: 8px;
            text-decoration: none;
            font-size: 1.1em;
            font-weight: bold;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
        }

        .channel-button:hover {
            background: #CC0000;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 0, 0, 0.4);
            color: white;
            text-decoration: none;
        }

        .channel-button::before {
            content: "";
            font-size: 1.2em;
        }

        /* Added YouTube video grid styles */
        .video-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
        }
        
        .video-card {
            background: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .video-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
        }
        
        .video-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        
        .video-title {
            padding: 15px;
            font-size: 1.1em;
            line-height: 1.4;
            color: #333;
            font-weight: 500;
        }
        
        .video-card a {
            text-decoration: none;
            color: inherit;
        }
        
        .loading-message {
            text-align: center;
            padding: 40px;
            font-size: 1.2em;
            color: #666;
        }
        
        /* Added responsive grid layout for tablets and smartphones */
        @media screen and (max-width: 1024px) {
            .video-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 25px;
                padding: 30px 15px;
            }
        }
        
        @media screen and (max-width: 767px) {
            .video-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 20px 10px;
            }
            
            .video-card img {
                height: 180px;
            }
            
            .video-title {
                padding: 12px;
                font-size: 1em;
            }

            .channel-button-section {
                margin: 30px 0;
                padding: 20px;
            }
            
            .channel-button {
                padding: 12px 24px;
                font-size: 1em;
            }
        }

        @media screen and (max-width: 767px) {
            /* Updated responsive styling for h2 */
            #main-visual h2 {
                font-size: 150%;
            }
            
            /* Reduced main-content margins on mobile for better space utilization */
            .main-content {
                margin: 0.5rem;
                padding: 1rem;
            }
            
            /* Make youtube-list full-width on mobile */
            .youtube-list {
                max-width: none;
                margin: 0;
                padding: 20px;
                border-radius: 0;
            }
            
            /* Added responsive behavior for access map to be full-width on small screens */
            .flexbox4 {
                flex-direction: column;
            }
            
            .main4 {
                flex: none;
                width: 100%;
            }
            
            .side4 {
                flex: none;
                width: 100%;
                margin-top: 1rem;
            }
            
            /* Reduced content-section margins on mobile */
            .content-section {
                margin: 0.5rem;
                padding: 1.5rem;
            }
            
            /* Updated responsive font size for tour content */
            .tour-content {
                font-size: 1.1em;
            }
        }