:root {
            --saffron: #FF9933;
            --white: #FFFFFF;
            --green: #138808;
            --navy: #000080;
            --teal: #008080;
            --gold: #FFD700;
            --light-saffron: #fff5e6;
            --light-green: #e6ffe6;
            --light-navy: #e6f3ff;
        }
        
        body {
            background-color: #f8f9fa;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            padding-top: 56px;
        }
        
        .navbar {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .hero-section {
            background: linear-gradient(135deg, var(--light-saffron), var(--light-green));
            border-radius: 16px;
            padding: 3rem;
            margin-bottom: 2rem;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 8px;
            background: linear-gradient(90deg, var(--saffron), var(--white), var(--green));
            z-index: 1;
        }
        
        .hero-title {
            position: relative;
            z-index: 2;
        }
        
        .district-map {
            max-width: 100%;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            margin-bottom: 20px;
        }
        
        .converter-card {
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
            border: none;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
            position: relative;
            background-color: white;
        }
        
        .converter-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 8px;
            background: linear-gradient(90deg, var(--saffron), var(--white), var(--green));
            z-index: 2;
        }
        
        .converter-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        
        .card-header {
            background-color: white;
            font-weight: 700;
            font-size: 1.25rem;
            padding: 1.5rem 1.5rem 1rem;
        }
        
        .card-body {
            padding: 1.5rem;
        }
        
        .calculator-icon {
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            margin-right: 15px;
            font-size: 1.75rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .icon-conversion { background: linear-gradient(135deg, #FF9933, #FF6600); color: white; }
        .icon-area { background: linear-gradient(135deg, #138808, #0B5E08); color: white; }
        .icon-price { background: linear-gradient(135deg, #000080, #1A237E); color: white; }
        
        .form-label {
            font-weight: 600;
            color: #444;
        }
        
        .btn-primary {
            background-color: var(--green);
            border-color: var(--green);
        }
        
        .btn-primary:hover {
            background-color: #0d7a07;
            border-color: #0d7a07;
        }
        
        .result-box {
            background-color: var(--light-navy);
            border-left: 4px solid var(--navy);
            padding: 15px;
            border-radius: 0 8px 8px 0;
            margin-top: 20px;
            display: none;
        }
        
        .unit-badge {
            display: inline-block;
            padding: 5px 10px;
            margin-right: 8px;
            margin-bottom: 8px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 8px;
            background-color: rgba(19, 136, 8, 0.1);
            color: var(--green);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            border: 1px solid rgba(19, 136, 8, 0.2);
        }
        
        .common-units {
            background-color: white;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }
        
        footer {
            background-color: var(--navy);
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        
        @media (max-width: 768px) {
            .hero-section {
                padding: 2rem 1rem;
            }
            
            .calculator-icon {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
                margin-right: 10px;
            }
        }
        
        /* Skip to content link for accessibility */
        .skip-link {
            position: absolute;
            top: -40px;
            left: 0;
            background: var(--navy);
            color: white;
            padding: 8px;
            z-index: 1000;
            text-decoration: none;
        }
        
        .skip-link:focus {
            top: 10px;
        }
        
        /* Content sections for semantic structure */
        .content-section {
            margin-bottom: 3rem;
        }