:root {
            --primary: #1e3a8a;
            --primary-light: #eff6ff;
            --success: #059669;
            --success-light: #ecfdf5;
            --danger: #dc2626;
            --danger-light: #fef2f2;
            --gray-700: #374151;
            --gray-100: #f3f4f6;
            --border: #e5e7eb;
            --radius: 8px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }

        body {
            background-color: #f9fafb;
            color: var(--gray-700);
            line-height: 1.6;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        header {
            margin-bottom: 30px;
            background: white;
            padding: 30px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }

        h1 {
            color: var(--primary);
            font-size: 2.2rem;
            margin-bottom: 15px;
        }

        .lead-text {
            font-size: 1.1rem;
            color: #4b5563;
            margin-bottom: 20px;
        }

        .fx-status-bar {
            font-size: 0.85rem;
            color: #6b7280;
            background-color: var(--gray-100);
            padding: 6px 12px;
            border-radius: 6px;
            display: inline-block;
            font-weight: 500;
        }

        .grid-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }

        @media (min-width: 900px) {
            .grid-layout {
                grid-template-columns: 400px 1fr;
            }
        }

        .panel {
            background: white;
            padding: 25px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            height: fit-content;
        }

        .panel h2 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--primary);
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 8px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 0.95rem;
        }

        input[type="number"], input[type="text"], select {
            width: 100%;
            padding: 10px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 1rem;
            color: var(--gray-700);
        }

        input:focus, select:focus {
            outline: 2px solid var(--primary);
        }

        .checkbox-group {
            max-height: 180px;
            overflow-y: auto;
            border: 1px solid var(--border);
            padding: 10px;
            border-radius: 6px;
            background: var(--gray-100);
        }

        .checkbox-item {
            display: flex;
            align-items: center;
            margin-bottom: 8px;
            font-size: 0.95rem;
        }

        .checkbox-item input {
            margin-right: 10px;
            width: 16px;
            height: 16px;
        }

        .bracket-row {
            display: grid;
            grid-template-columns: 1fr 1fr auto;
            gap: 8px;
            margin-bottom: 8px;
        }

        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            width: 100%;
            transition: background 0.2s;
        }

        .btn:hover {
            background: #1d4ed8;
        }

        .btn-secondary {
            background: var(--gray-100);
            color: var(--gray-700);
            border: 1px solid var(--border);
            margin-top: 5px;
        }

        .btn-secondary:hover {
            background: #e5e7eb;
        }

        .action-area {
            margin-top: 15px;
        }

        .share-banner {
            margin-top: 15px;
            padding: 12px;
            background-color: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: 6px;
        }

        .share-input-wrapper {
            display: flex;
            gap: 8px;
            margin-top: 6px;
        }

        .share-input-wrapper input {
            flex: 1;
            padding: 6px 10px;
            font-size: 0.85rem;
            border: 1px solid var(--border);
            border-radius: 4px;
            background: #fff;
        }

        .share-input-wrapper button {
            width: auto;
            padding: 6px 12px;
            font-size: 0.85rem;
        }

        .cards-container {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .card {
            background: white;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 20px;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .card.base-country {
            border-left: 6px solid var(--primary);
            background-color: #f8fafc;
        }

        .card.highest-net {
            border: 2px solid var(--success);
            box-shadow: 0 4px 12px rgba(5, 150, 105, 0.1);
        }

        .card.lowest-tax {
            background: var(--success-light);
        }

        .badge-container {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 4px;
        }

        .badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: bold;
            text-transform: uppercase;
            padding: 4px 8px;
            border-radius: 4px;
        }

        .badge-base { background: var(--primary-light); color: var(--primary); }
        .badge-highest { background: var(--success); color: white; }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px dashed var(--border);
            gap: 15px;
        }

        .card-title-group {
            display: flex;
            flex-direction: column;
        }

        .card-title {
            font-size: 1.3rem;
            font-weight: 700;
            line-height: 1.2;
        }

        .card-meta-type {
            font-size: 0.85rem;
            color: #6b7280;
            font-weight: bold;
            text-align: right;
            white-space: nowrap;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 15px;
            margin-bottom: 15px;
        }

        .metric label {
            font-size: 0.8rem;
            color: #6b7280;
            text-transform: uppercase;
        }

        .metric .value {
            font-size: 1.1rem;
            font-weight: 700;
        }

        .metric .sub-label {
            font-size: 0.75rem;
            color: #9ca3af;
        }

        .metric .lowest-tax-highlight {
            font-size: 0.75rem;
            color: #10b981;
            font-weight: 600;
        }

        .comparison-bar {
            font-size: 0.9rem;
            padding: 8px 12px;
            background: var(--gray-100);
            border-radius: 6px;
            display: flex;
            justify-content: space-between;
        }

        .comparison-bar.positive { border-left: 4px solid var(--success); }
        .comparison-bar.negative { border-left: 4px solid var(--danger); }

        .seo-section {
            margin-top: 40px;
            background: white;
            padding: 35px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }

        .seo-section h2, .seo-section h3 {
            color: var(--primary);
            margin-top: 25px;
            margin-bottom: 12px;
        }

        .seo-section p {
            margin-bottom: 15px;
            color: #4b5563;
            text-align: justify;
        }

        .disclaimer {
            background: var(--danger-light);
            border: 1px solid #fca5a5;
            padding: 15px;
            border-radius: var(--radius);
            margin-top: 30px;
            font-size: 0.9rem;
            color: var(--danger);
        }

        .panel-wrapper { margin-bottom: 20px; }
        .error-message { padding: 20px; color: var(--danger); }
        .empty-trigger-msg { padding: 20px; text-align: center; }
        .bracket-delete-btn { margin: 0; padding: 10px; }

        .hidden { display: none !important; }