/* --- 1. RESET & BASIC SETUP --- */
            * { box-sizing: border-box; margin: 0; padding: 0; }
            body { font-family: sans-serif; background: #f4f4f4; }

            /* --- 2. THUMBNAIL GRID (Landing Page) --- */
            .gallery-container {
                max-width: 1200px;
                margin: 0 auto;
                padding: 20px;
                display: grid;
                /* Auto-fill creates a responsive grid automatically */
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
                gap: 15px;
            }

            .thumb-card {
                cursor: pointer;
                overflow: hidden;
                border-radius: 4px;
                box-shadow: 0 2px 5px rgba(0,0,0,0.1);
                transition: transform 0.3s ease;
                aspect-ratio: 1 / 1; /* Forces square thumbnails */
            }

            .thumb-card:hover {
                transform: scale(1.03); /* Slight zoom on hover like your old album */
                box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            }

            .thumb-card img {
                width: 100%;
                height: 100%;
                object-fit: cover; /* Ensures image fills square without stretching */
                display: block;
            }

            /* --- 3. LIGHTBOX OVERLAY (Hidden by default) --- */
            .lightbox {
                display: none; /* Hidden! */
                position: fixed;
                top: 0; left: 0;
                width: 100%; height: 100%;
                background: rgba(0, 0, 0, 0.95); /* Dark overlay */
                z-index: 1000;
                flex-direction: column;
                justify-content: center;
                align-items: center;
            }

            .lightbox.active {
                display: flex; /* Shown when active */
            }

            /* Top Menu Bar */
            .lightbox-header {
                position: absolute;
                top: 0;
                width: 100%;
                padding: 20px;
                display: flex;
                justify-content: flex-end;
                z-index: 1001;
            }

            .close-btn {
                color: white;
                font-size: 30px;
                cursor: pointer;
                background: none;
                border: none;
                padding: 10px;
            }

            /* Main Image Area */
            .lightbox-content {
                max-width: 90%;
                max-height: 80vh;
                position: relative;
            }

            .lightbox-img {
                max-width: 100%;
                max-height: 70vh;
                object-fit: contain;
                box-shadow: 0 0 20px rgba(0,0,0,0.5);
            }

            /* Navigation Arrows */
            .prev-btn, .next-btn {
                position: absolute;
                top: 50%;
                transform: translateY(-50%);
                background: none;
                border: none;
                color: white;
                font-size: 40px;
                cursor: pointer;
                padding: 20px;
                user-select: none;
            }
            .prev-btn { left: 20px;z-index:1002; }
            .next-btn { right: 20px; }

            /* Bottom Caption */
            .lightbox-caption {
                position: absolute;
                bottom: 0;
                width: 100%;
                padding: 20px;
                text-align: center;
                color: #ccc;
                background: rgba(0,0,0,0.5);
                font-size: 1.1rem;
                min-height: 60px;
            }
            
            .lightbox-img {
	    /* ... keep your existing styles (max-width, etc) ... */
	    transition: transform 0.2s ease; /* Smooth zoom */
	    cursor: zoom-in; /* Tells user they can click */
	   }

	   .lightbox-img.zoomed {
		transform: scale(2.5); /* The Zoom Level */
		cursor: zoom-out;
		z-index: 100; /* Ensure it stays on top of arrows */
	  }

	  /* Optional: Hide arrows when zoomed to prevent distraction */
	 .lightbox.is-zoomed .nav-btn,
	 .lightbox.is-zoomed .caption {
	    opacity: 0;
	    pointer-events: none; /* Prevent clicking hidden arrows */
	 }