/* ==========================================================================
           Non-Critical CSS - Below the fold styles
           ========================================================================== */
        
        /* Container and Layout */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        
        .content-section {
            padding: 8rem 0;
            background: #123524;
            position: relative;
            color: #F6EFD7;
        }
        
        /* Problem Section */
        .problem-section {
            background-image: url('../images/forest-background-1.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }
        
        .problem-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(18, 53, 36, 0.7);
            z-index: 1;
        }
        
        .problem-section .container {
            position: relative;
            z-index: 2;
        }
        
        /* Calculator Section */
        .calculator-section {
            background: linear-gradient(135deg, #123524 0%, #1B5E20 100%);
        }
        
        /* Desktop/Tablet Calculator Layout - Side by Side */
        @media (min-width: 768px) {
            .calculator-layout {
                display: flex;
                gap: 5rem;
                align-items: flex-start;
            }
            
            .calculator-inputs-column {
                flex: 1;
                min-width: 400px;
            }
            
            .calculator-results {
                flex: 1;
                min-width: 400px;
            }
            
        /* Desktop/Tablet Calculator Layout - Side by Side */
        @media (min-width: 768px) {
            .calculator-layout {
                display: flex;
                gap: 5rem;
                align-items: flex-start;
            }
            
            .calculator-inputs-column {
                flex: 1;
                min-width: 400px;
            }
            
            .calculator-results {
                flex: 1;
                min-width: 400px;
            }
            
            .calculator-inputs {
                margin-bottom: 0;
            }
            
            .input-group {
                margin-bottom: 0.1rem;
                position: relative;
                overflow: hidden; /* Clearfix for floated elements */
            }
            
            .input-group label {
                display: block;
                color: #F6EFD7;
                font-size: 1.6rem;
                margin-bottom: 0.7rem;
                font-weight: 600;
                clear: both;
            }
            
            .input-group .slider {
                margin-bottom: 0.2rem;
                clear: both;
            }
            
            .slider {
                width: 100%;
                height: 6px;
                border-radius: 3px;
                background: rgba(255, 255, 255, 0.2);
                outline: none;
                -webkit-appearance: none;
                appearance: none;
            }
            
            .slider::-webkit-slider-thumb {
                -webkit-appearance: none;
                appearance: none;
                width: 20px;
                height: 20px;
                border-radius: 50%;
                background: #F6EFD7;
                cursor: pointer;
                transition: all 0.3s ease;
                border: none;
                margin-top: -7px;
            }
            
            .slider::-webkit-slider-thumb:hover {
                transform: scale(1.2);
            }
            
            .slider::-moz-range-thumb {
                width: 20px;
                height: 20px;
                border-radius: 50%;
                background: #F6EFD7;
                cursor: pointer;
                transition: all 0.3s ease;
                border: none;
                margin-top: -7px;
            }
            
            .slider::-moz-range-thumb:hover {
                transform: scale(1.2);
            }
            
            .slider::-moz-range-track {
                width: 100%;
                height: 6px;
                cursor: pointer;
                background: rgba(255, 255, 255, 0.2);
                border-radius: 3px;
                border: none;
            }
            
            .slider::-webkit-slider-runnable-track {
                width: 100%;
                height: 6px;
                cursor: pointer;
                background: rgba(255, 255, 255, 0.2);
                border-radius: 3px;
                border: none;
            }
            
            .value-display {
    			display: block;
   				text-align: right;
    			color: rgba(255, 255, 255, 0.8);
    			font-size: 1.4rem;
    			margin-top: 0.5rem;
    			font-weight: 400;
    			width: 100%;
			}
            
            /* Desktop Forest Visualization */
            .forest-visualization {
                position: relative;
                height: 200px;
                background: linear-gradient(to top, rgba(139, 69, 19, 0.2) 0%, transparent 40%);
                border-radius: 10px;
                overflow: hidden;
            }
            
            .tree {
                position: absolute;
                bottom: 0;
                width: auto;
                height: 60px;
                transition: height 0.5s ease, opacity 0.5s ease, transform 0.5s ease;
                background: none;
                opacity: 0;
                transform: translateX(-50%);
                transform-origin: bottom center;
            }
            
            .tree:nth-child(1) { left: 18%; }
            .tree:nth-child(6) { left: 30%; }
            .tree:nth-child(2) { left: 42%; }
            .tree:nth-child(5) { left: 54%; }
            .tree:nth-child(7) { left: 66%; }
            .tree:nth-child(4) { left: 78%; }
            .tree:nth-child(3) { left: 90%; }
            
            .tree.visible {
                opacity: 1;
            }
            
            .tree img {
                width: auto;
                height: 100%;
                display: block;
                object-fit: contain;
				object-position: center bottom;
            }
        }
        }
        
        /* Video Section */
        .video-section {
            background-image: url('../images/technology-background.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }
        
        .video-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(18, 53, 36, 0.6);
            z-index: 1;
        }
        
        .video-section .container {
            position: relative;
            z-index: 2;
        }
        
        /* Credits Section */
        .credits-section {
            background: linear-gradient(135deg, #123524 0%, #1B5E20 100%);
        }
        
        /* Features Section */
        .features-section {
            background-image: url('../images/forest-background.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }
        
        .features-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1;
        }
        
        .features-section .container {
            position: relative;
            z-index: 2;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }
        
        .section-header h2 {
            font-size: clamp(2.4rem, 4vw, 4rem);
            color: #F6EFD7;
            margin-bottom: 1rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 3px;
        }
        
        .section-subtitle {
            font-size: clamp(1.4rem, 2vw, 1.8rem);
            color: rgba(246, 239, 215, 0.9);
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        /* Content Layout */
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        
        .content-text .text-block {
            margin-bottom: 3rem;
        }
        
        .content-text h3 {
            font-size: 2.4rem;
            color: #F6EFD7;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        
        .content-text p {
            font-size: 1.6rem;
            line-height: 1.7;
            color: rgba(246, 239, 215, 0.9);
            margin-bottom: 1.5rem;
        }
        
        .content-media img {
            width: 100%;
            height: auto;
            border-radius: 12px;
        }
        
        /* Calculator Styles */
        .calculator-container {
            max-width: 1400px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 3rem;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .calculator-presets {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 3rem;
        }
        
        .preset-btn {
            padding: 1rem 2rem;
            background: rgba(255, 255, 255, 0.1);
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #F6EFD7;
            font-size: 1.4rem;
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .preset-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        
        .preset-btn.active {
            background: #F6EFD7;
            color: #123524;
            border-color: #F6EFD7;
        }
        
        .calculator-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: flex-start;
        }
        
        .input-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        
        .input-group {
            display: flex;
            flex-direction: column;
        }
        
        .input-group label {
            font-size: 1.5rem;
            color: #F6EFD7;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }
        
        .input-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
		
		/* Slider Styles for Desktop/Tablet */
        .calculator-slider {
            flex: 1;
            height: 6px;
            background: rgba(246, 239, 215, 0.2);
            border-radius: 3px;
            outline: none;
            -webkit-appearance: none;
        }
        
        .calculator-slider::-webkit-slider-thumb {
            appearance: none;
            width: 20px;
            height: 20px;
            background: #F6EFD7;
            border-radius: 50%;
            cursor: pointer;
        }
        
        .calculator-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            background: #F6EFD7;
            border-radius: 50%;
            cursor: pointer;
            border: none;
        }
        
        /* Number Display for Desktop/Tablet */
        .calculator-display {
            width: 80px;
            background: rgba(246, 239, 215, 0.1);
            border: 1px solid rgba(246, 239, 215, 0.3);
            border-radius: 5px;
            padding: 0.5rem;
            color: #F6EFD7;
            text-align: center;
            font-weight: 600;
        }
        
        /* Number Input for Mobile */
        
        .calculator-input {
            width: 100%;
            padding: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            font-size: 1.4rem;
            text-align: center;
            transition: border-color 0.3s ease;
            background: rgba(255, 255, 255, 0.1);
            color: #F6EFD7;
        }
        
        .calculator-input:focus {
            outline: none;
            border-color: #F6EFD7;
            box-shadow: 0 0 0 3px rgba(246, 239, 215, 0.1);
        }
        
        .input-unit {
            position: absolute;
            right: 1rem;
            font-size: 1.2rem;
            color: rgba(246, 239, 215, 0.8);
            pointer-events: none;
        }
        
        .results-display {
            background: rgba(246, 239, 215, 0.1);
            padding: 2rem;
            border-radius: 12px;
            text-align: center;
            margin-bottom: 2rem;
            border: 1px solid rgba(246, 239, 215, 0.2);
        }
        
        .result-item {
            margin-bottom: 1.5rem;
        }
        
        .result-label {
            display: block;
            font-size: 1.2rem;
            color: rgba(246, 239, 215, 0.7);
            margin-bottom: 0.5rem;
        }
        
        .result-value {
            display: block;
            font-size: 3rem;
            font-weight: 700;
            color: #F6EFD7;
        }
        
        .result-comparison {
            font-size: 1.4rem;
            color: rgba(246, 239, 215, 0.8);
            font-style: italic;
        }
		
		/* Tablet and smaller screens - side by side results */
@media (max-width: 1199px) {
    .results-display {
        background: rgba(246, 239, 215, 0.1);
        padding: 2rem;
        border-radius: 12px;
        text-align: center;
        margin-bottom: 2rem;
        border: 1px solid rgba(246, 239, 215, 0.2);
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: flex-start;
    }
    
    /* First two result items side by side */
    .result-item {
        flex: 0 0 48%;
        margin-bottom: 1rem;
        text-align: center;
    }
    
    /* Comparison text takes full width below */
    .result-comparison {
        flex: 0 0 100%;
        font-size: 1.4rem;
        color: rgba(246, 239, 215, 0.8);
        font-style: italic;
        margin-top: 0.5rem;
        text-align: center;
    }
}

/* Mobile specific adjustments */
@media (max-width: 767px) {
    .results-display {
        padding: 1.5rem;
        gap: 0.5rem;
    }
    
    .result-item {
        flex: 0 0 48%;
    }
    
    .result-value {
        font-size: 2.2rem;
        font-weight: 700;
        color: #F6EFD7;
    }
    
    .result-label {
        font-size: 1.1rem;
        color: rgba(246, 239, 215, 0.7);
        margin-bottom: 0.3rem;
    }
    
    .result-comparison {
        font-size: 1.2rem;
        margin-top: 0.3rem;
    }
}
        
        /* Results display - shared across desktop and mobile */
        @media (max-width: 767px) {
            .forest-visualization {
                position: relative;
                height: 150px;
                background: linear-gradient(to top, rgba(139, 69, 19, 0.1) 0%, transparent 40%);
                border-radius: 12px;
                display: flex;
                align-items: flex-end;
                justify-content: space-around;
                padding: 1rem;
            }
            
            .tree {
                width: 65px;
                height: 130px;
                background-size: contain;
                background-repeat: no-repeat;
                background-position: center bottom;
                opacity: 0;
                transform: scale(0.5);
                transition: all 0.5s ease;
                position: relative;
            }
            
            .tree:nth-child(1) { left: auto; }
            .tree:nth-child(2) { left: auto; }
            .tree:nth-child(3) { left: auto; }
            .tree:nth-child(4) { left: auto; }
            .tree:nth-child(5) { left: auto; }
            .tree:nth-child(6) { left: auto; }
            .tree:nth-child(7) { left: auto; }
            .tree:nth-child(8) { left: auto; }
            
            .tree[data-tree-index="1"] {
                background-image: url('../images/tree1.png');
            }
            
            .tree[data-tree-index="2"] {
                background-image: url('../images/tree2.png');
            }
            
            .tree[data-tree-index="3"] {
                background-image: url('../images/tree3.png');
            }
            
            .tree[data-tree-index="4"] {
                background-image: url('../images/tree4.png');
            }
            
            .tree[data-tree-index="5"] {
                background-image: url('../images/tree5.png');
            }
            
            .tree[data-tree-index="6"] {
                background-image: url('../images/tree6.png');
            }
            
            .tree[data-tree-index="7"] {
                background-image: url('../images/tree7.png');
            }
            
            .tree[data-tree-index="8"] {
                background-image: url('../images/tree8.png');
            }
            
            .tree.visible {
                opacity: 1;
                transform: scale(1.5);
            }
            
            .tree img {
                display: none;
            }
        }
        
        /* Video Section */
        .experience-video-container {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
        }
        
        .experience-video {
            width: 100%;
            height: auto;
            display: block;
        }
        
        .video-play-btn {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 100px;
            height: 100px;
            background: rgba(18, 53, 36, 0.7);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            transition: all 0.3s ease;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .video-play-btn:hover {
            background: rgba(164, 134, 35, 0.5);
            transform: translate(-50%, -50%) scale(1.1);
        }
        
        .play-icon {
            position: relative;
            z-index: 3;
        }
        
        .play-triangle {
            width: 0;
            height: 0;
            border-style: solid;
            border-width: 15px 0 15px 25px;
            border-color: transparent transparent transparent #F6EFD7;
            transform: translateX(2px);
        }
        
        .play-ripple {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 2px solid rgba(246, 239, 215, 0.5);
            border-radius: 50%;
            animation: ripple 2s infinite ease-out;
        }
        
        .play-ripple.delayed {
            animation-delay: 1s;
        }
        
        @keyframes ripple {
            0% {
                transform: scale(1);
                opacity: 1;
            }
            100% {
                transform: scale(1.5);
                opacity: 0;
            }
        }
        
        /* Loading spinner for progressive video loading */
        .loading-spinner {
            width: 40px;
            height: 40px;
            border: 4px solid rgba(246, 239, 215, 0.3);
            border-top: 4px solid #F6EFD7;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Hide play button elements on mobile, keep native video controls */
        @media (max-width: 767px) {
            .play-triangle,
            .play-ripple {
                display: none;
            }
            
            .video-play-btn {
                background: transparent;
                border: none;
                width: 100%;
                height: 100%;
                border-radius: 0;
            }
            
            .video-play-btn:hover {
                background: transparent;
                transform: none;
            }
        }
        
        /* Features Section */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 3rem;
            margin-top: 4rem;
        }
        
        .feature-card {
            text-align: center;
            padding: 3rem 2rem;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            transition: transform 0.3s ease;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            background: rgba(164, 134, 35, 0.3);
        }
        
        .feature-icon {
            margin-bottom: 2rem;
        }
        
        .feature-card h3 {
            font-size: 2rem;
            color: #F6EFD7;
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        
        .feature-card p {
            font-size: 1.4rem;
            line-height: 1.6;
            color: rgba(246, 239, 215, 0.9);
        }
        
        /* CTA Section */
        .cta-section {
            background-image: url('../images/forest-background.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #F6EFD7;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1;
        }
        
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        
        .cta-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .cta-content h2 {
            font-size: clamp(2.4rem, 4vw, 4rem);
            margin-bottom: 2rem;
            color: #F6EFD7;
            text-transform: uppercase;
            letter-spacing: 3px;
        }
        
        .cta-description {
            font-size: clamp(1.4rem, 2vw, 1.8rem);
            margin-bottom: 4rem;
            color: #F6EFD7;
            opacity: 0.9;
        }
        
        .product-card {
            background: #F6EFD7;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(18, 53, 36, 0.2);
            max-width: 500px;
            margin: 0 auto;
        }
        
        .product-header {
            background: #123524;
            padding: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .product-header h3 {
            color: #F6EFD7;
            font-size: 2.4rem;
            margin: 0;
        }
        
        .product-badge {
            background: #F6EFD7;
            color: #123524;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 1.2rem;
            font-weight: 600;
        }
        
        .product-content {
            padding: 3rem 2rem;
            color: #333;
            text-align: center;
        }
        
        .price-display {
            margin-bottom: 2rem;
        }
        
        .currency {
            font-size: 3rem;
            color: #123524;
            vertical-align: top;
        }
        
        .price {
            font-size: 6rem;
            color: #123524;
            font-weight: 700;
        }
        
        .price-period {
            font-size: 1.8rem;
            color: #666;
            margin-left: 1rem;
        }
        
        .product-features {
            list-style: none;
            text-align: left;
            margin: 2rem 0;
        }
        
        .product-features li {
            padding: 1rem 0 1rem 3rem;
            border-bottom: 1px solid #eee;
            position: relative;
            font-size: 1.4rem;
            line-height: 1.5;
        }
        
        .product-features li:before {
            content: '✓';
            position: absolute;
            left: 1rem;
            color: #2E7D32;
            font-size: 1.6rem;
            font-weight: 700;
        }
        
        .purchase-btn {
            background: #2E7D32;
            color: #F6EFD7;
            border: none;
            padding: 1.5rem 3rem;
            font-size: 1.8rem;
            font-weight: 700;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            margin-bottom: 1rem;
        }
        
        .purchase-btn:hover {
            background: #A58623;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(18, 53, 36, 0.3);
        }
        
        .guarantee {
            font-size: 1.2rem;
            color: #666;
            margin: 0;
        }
        
        /* Mobile Responsive */
        @media (max-width: 1199px) {
            .content-layout {
                grid-template-columns: 1fr;
                gap: 3rem;
            }
            
            .calculator-layout {
                grid-template-columns: 1fr;
                gap: 3rem;
            }
        }
        
        @media (max-width: 767px) {
            .container {
                padding: 0 1.5rem;
            }
            
            .content-section {
                padding: 6rem 0;
            }
            
            .calculator-container {
                padding: 1.5rem;
            }
            
            /* Mobile Calculator Layout - Restore Original Grid */
            .calculator-layout {
                display: block;
            }
            
            .input-grid {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
                margin-bottom: 3rem;
            }
            
            .input-group {
                display: flex;
                flex-direction: column;
            }
            
            .input-group label {
                font-size: 1.3rem;
                color: #F6EFD7;
                margin-bottom: 0.5rem;
                font-weight: 600;
            }
            
            .input-wrapper {
                position: relative;
                display: flex;
                align-items: center;
            }
            
            .calculator-input {
                width: 100%;
                padding: 1rem;
                border: 2px solid rgba(255, 255, 255, 0.3);
                border-radius: 8px;
                font-size: 1.4rem;
                text-align: center;
                transition: border-color 0.3s ease;
                background: rgba(255, 255, 255, 0.1);
                color: #F6EFD7;
            }
            
            .calculator-input:focus {
                outline: none;
                border-color: #F6EFD7;
                box-shadow: 0 0 0 3px rgba(246, 239, 215, 0.1);
            }
            
            .input-unit {
                position: absolute;
                right: 1rem;
                font-size: 1.2rem;
                color: rgba(246, 239, 215, 0.8);
                pointer-events: none;
            }
            
            /* Optimized preset buttons - keep horizontal */
            .calculator-presets {
                flex-wrap: nowrap;
                gap: 0.8rem;
                justify-content: center;
            }
            
            .preset-btn {
                padding: 0.7rem 1.2rem;
                font-size: 1.1rem;
                flex: 1;
                max-width: 100px;
                white-space: nowrap;
                background: rgba(255, 255, 255, 0.1);
                border: 2px solid rgba(255, 255, 255, 0.3);
                color: #F6EFD7;
            }
            
            .preset-btn:hover {
                background: rgba(255, 255, 255, 0.2);
            }
            
            .preset-btn.active {
                background: #F6EFD7;
                color: #123524;
                border-color: #F6EFD7;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            
            .feature-card {
                padding: 2rem 1.5rem;
            }
            
            .product-header {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            
            .product-content {
                padding: 2rem 1.5rem;
            }
            
            .price {
                font-size: 5rem;
            }
            
            .currency {
                font-size: 2.5rem;
            }
            
            .product-features li {
                font-size: 1.3rem;
                padding: 0.8rem 0 0.8rem 2.5rem;
            }
            
            .product-features li:before {
                left: 0.8rem;
                font-size: 1.4rem;
            }
        }
        
        @media (max-width: 480px) {
            .calculator-container {
                padding: 1rem;
            }
            
            /* Ensure preset buttons stay horizontal even on very small screens */
            .calculator-presets {
                gap: 0.5rem;
            }
            
            .preset-btn {
                padding: 0.6rem 0.8rem;
                font-size: 1rem;
                max-width: 85px;
                background: rgba(255, 255, 255, 0.1);
                border: 2px solid rgba(255, 255, 255, 0.3);
                color: #F6EFD7;
            }
            
            .preset-btn.active {
                background: #F6EFD7;
                color: #123524;
                border-color: #F6EFD7;
            }
            
            /* Tighter spacing for very small screens */
            .input-grid {
                gap: 0.8rem;
            }
            
            .input-group label {
                font-size: 1rem;
            }
            
            .calculator-input {
                padding: 0.7rem 0.4rem;
                font-size: 1.3rem;
                background: rgba(255, 255, 255, 0.1);
                border: 2px solid rgba(255, 255, 255, 0.3);
                color: #F6EFD7;
            }
            
            .input-unit {
                font-size: 0.9rem;
                right: 0.4rem;
                color: rgba(246, 239, 215, 0.8);
            }
            
            .result-value {
                font-size: 2rem;
                color: #F6EFD7;
            }
        }
        
        /* Animation classes for progressive loading */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s ease-out forwards;
        }
        
        .fade-in-delay-1 {
            animation-delay: 0.2s;
        }
        
        .fade-in-delay-2 {
            animation-delay: 0.4s;
        }
        
        .fade-in-delay-3 {
            animation-delay: 0.6s;
        }
        
        /* Performance optimizations */
        img {
            max-width: 100%;
            height: auto;
        }
        
        video {
            max-width: 100%;
            height: auto;
        }
        
        /* Accessibility improvements */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            
            html {
                scroll-behavior: auto;
            }
        }
        
        /* Focus styles for keyboard navigation */
        .nav-dot:focus,
        .preset-btn:focus,
        .calculator-input:focus,
        .purchase-btn:focus,
        .hero-cta-btn:focus {
            outline: 2px solid #F6EFD7;
            outline-offset: 2px;
        }
        
        /* High contrast mode support */
        @media (prefers-contrast: high) {
            .hero-overlay {
                background: rgba(0, 0, 0, 0.7);
            }
            
            .nav-container {
                background: rgba(0, 0, 0, 0.8);
            }
        }