:root {
            --primary-color: #FF5A5F;
            --secondary-color: #00A699;
            --dark-color: #484848;
            --light-color: #f7f7f7;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f5f5;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
        }

        .vat-calculator {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 30px;
            width: 100%;
            max-width: 500px;
            transition: all 0.3s ease;
        }

        .vat-calculator:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        h1 {
            color: var(--dark-color);
            text-align: center;
            margin-bottom: 25px;
            font-weight: 600;
            font-size: 28px;
        }

        .input-group {
            margin-bottom: 20px;
            position: relative;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: var(--dark-color);
            font-weight: 500;
        }

        .input-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }

        .currency-symbol {
            position: absolute;
            left: 15px;
            color: var(--dark-color);
            font-weight: 500;
        }

        input, select {
            width: 100%;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: all 0.3s ease;
        }

        input:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(255, 90, 95, 0.2);
        }

        input[type="number"] {
            padding-left: 50px;
        }

        .vat-rate {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 20px;
        }

        .vat-rate-option {
            flex: 1;
            min-width: 100px;
            text-align: center;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .vat-rate-option:hover {
            border-color: var(--primary-color);
        }

        .vat-rate-option.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .manual-vat-input {
            display: none;
            margin-top: 10px;
        }

        .manual-vat-input.active {
            display: block;
        }

        .manual-vat-wrapper {
            position: relative;
        }

        .manual-vat-wrapper::after {
            content: '%';
            position: absolute;
            right: 50px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--dark-color);
        }

        button {
            width: 100%;
            padding: 15px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        button:hover {
            background-color: #e04a50;
            transform: translateY(-2px);
        }

        button:active {
            transform: translateY(0);
        }

        .result {
            margin-top: 30px;
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 20px;
            display: none;
        }

        .result.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        .result-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            padding-bottom: 10px;
            border-bottom: 1px solid #e0e0e0;
        }

        .result-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .result-label {
            color: var(--dark-color);
            font-weight: 500;
        }

        .result-value {
            color: var(--secondary-color);
            font-weight: 600;
        }

        .total .result-value {
            font-size: 20px;
            color: var(--primary-color);
        }

        .tooltip {
            position: relative;
            display: inline-block;
            margin-left: 8px;
            cursor: pointer;
        }

        .tooltip-icon {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            width: 18px;
            height: 18px;
            background-color: var(--dark-color);
            color: white;
            border-radius: 50%;
            font-size: 12px;
            font-weight: bold;
        }

        .tooltip-text {
            visibility: hidden;
            width: 200px;
            background-color: var(--dark-color);
            color: white;
            text-align: center;
            border-radius: var(--border-radius);
            padding: 10px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 14px;
            font-weight: normal;
        }

        .tooltip:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }

        .country-selector {
            margin-bottom: 20px;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @media (max-width: 480px) {
            .vat-calculator {
                padding: 20px;
            }

            h1 {
                font-size: 24px;
            }

            .vat-rate-option {
                min-width: calc(50% - 5px);
            }
        }