:root {
            --saffron: #FF9933;
            --white: #FFFFFF;
            --green: #138808;
            --navy: #000080;
            --teal: #008080;
            --gold: #FFD700;
            --light-bg: #f8f9fa;
            --dark-bg: #121212;
            --dark-card: #1e1e1e;
            --dark-text: #e0e0e0;
        }
        
        body {
            background-color: var(--light-bg);
            font-family: 'Poppins', sans-serif;
            transition: background-color 0.3s, color 0.3s;
        }
        
        body.dark-theme {
            background-color: var(--dark-bg);
            color: var(--dark-text);
        }
        
        .dark-theme .navbar {
            background-color: var(--dark-card) !important;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        
        .dark-theme .converter-card {
            background: var(--dark-card);
            color: var(--dark-text);
            box-shadow: 0 6px 15px rgba(0,0,0,0.2);
        }
        
        .dark-theme .form-control {
            background-color: #2d2d2d;
            border-color: #444;
            color: var(--dark-text);
        }
        
        .dark-theme .form-control:focus {
            background-color: #2d2d2d;
            border-color: var(--saffron);
            color: var(--dark-text);
            box-shadow: 0 0 0 0.25rem rgba(255, 153, 51, 0.25);
        }
        
        .dark-theme .result-box {
            background: linear-gradient(135deg, #2d2d2d, #252525);
            border-left: 4px solid var(--saffron);
        }
        
        .dark-theme .conversion-note {
            background-color: #2d2d2d;
            border-left: 3px solid var(--green);
        }
        
        .dark-theme .nav-tabs .nav-link {
            color: #bbb;
        }
        
        .dark-theme .nav-tabs .nav-link.active {
            color: var(--saffron);
        }
        
        .dark-theme .section-title {
            color: var(--saffron);
        }
        
        .navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 0.8rem 0;
        }
        
        .hero-section {
            background: linear-gradient(135deg, rgba(255, 153, 51, 0.1), rgba(19, 136, 8, 0.1));
            border-radius: 16px;
            padding: 2.5rem;
            margin-bottom: 2rem;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--saffron), var(--white), var(--green));
        }
        
        .converter-card {
            background: white;
            border-radius: 16px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .converter-card:hover {
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            transform: translateY(-5px);
        }
        
        .section-title {
            position: relative;
            padding-bottom: 0.75rem;
            margin-bottom: 1.5rem;
            color: var(--navy);
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        .section-title i {
            margin-right: 10px;
            font-size: 1.5rem;
            color: var(--saffron);
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--saffron), var(--green));
            border-radius: 2px;
        }
        
        .input-group {
            margin-bottom: 1rem;
        }
        
        .input-group label {
            font-weight: 500;
            color: #555;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
        }
        
        .input-group label i {
            margin-right: 8px;
            color: var(--saffron);
        }
        
        .form-control {
            border-radius: 8px;
            padding: 0.75rem;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--saffron);
            box-shadow: 0 0 0 0.25rem rgba(255, 153, 51, 0.25);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--saffron), var(--green));
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            background: linear-gradient(135deg, var(--green), var(--saffron));
        }
        
        .result-box {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            border-radius: 12px;
            padding: 1.5rem;
            margin-top: 1.5rem;
            border-left: 4px solid var(--saffron);
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .result-item {
            display: flex;
            justify-content: space-between;
            padding: 0.5rem 0;
            border-bottom: 1px solid #eee;
        }
        
        .result-item:last-child {
            border-bottom: none;
        }
        
        .result-label {
            font-weight: 600;
            color: #555;
        }
        
        .dark-theme .result-label {
            color: #bbb;
        }
        
        .result-value {
            font-weight: 700;
            color: var(--navy);
        }
        
        .dark-theme .result-value {
            color: var(--saffron);
        }
        
        .conversion-note {
            background-color: #f8f9fa;
            border-radius: 8px;
            padding: 1rem;
            margin-top: 1.5rem;
            font-size: 0.9rem;
            border-left: 3px solid var(--green);
        }
        
        .tab-content {
            padding: 1.5rem 0;
        }
        
        .nav-tabs {
            border-bottom: 2px solid #eee;
            margin-bottom: 1.5rem;
        }
        
        .dark-theme .nav-tabs {
            border-bottom: 2px solid #444;
        }
        
        .nav-tabs .nav-link {
            border: none;
            border-bottom: 3px solid transparent;
            color: #555;
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            transition: all 0.3s;
            border-radius: 0;
        }
        
        .nav-tabs .nav-link.active {
            color: var(--navy);
            border-bottom: 3px solid var(--saffron);
            background: transparent;
        }
        
        .nav-tabs .nav-link:hover {
            border-color: #ddd;
        }
        
        .unit-badge {
            display: inline-block;
            padding: 0.35rem 0.65rem;
            background: linear-gradient(135deg, var(--saffron), var(--green));
            color: white;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        
        .info-tooltip {
            display: inline-block;
            margin-left: 0.5rem;
            color: var(--saffron);
            cursor: pointer;
        }
        
        .visual-representation {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 1.5rem;
            padding: 1rem;
            background: rgba(19, 136, 8, 0.05);
            border-radius: 12px;
        }
        
        .unit-visual {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 0 1rem;
        }
        
        .unit-box {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--saffron), var(--green));
            border-radius: 8px;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }
        
        .unit-arrow {
            font-size: 1.5rem;
            color: var(--saffron);
        }
        
        
        .dark-theme footer {
            background: var(--dark-card);
            border-top: 1px solid #444;
        }
        
        @media (max-width: 768px) {
            .converter-card {
                padding: 1.5rem;
            }
            
            .hero-section {
                padding: 1.5rem;
            }
            
            .nav-tabs .nav-link {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }
            
            .visual-representation {
                flex-wrap: wrap;
            }
            
            .unit-arrow {
                transform: rotate(90deg);
                margin: 0.5rem 0;
            }
        }