.converter-card {
            background: white;
            border-radius: 1rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
            padding: 1.8rem;
            margin-bottom: 2rem;
            border: 1px solid var(--border-color, #e9ecef);
            transition: box-shadow 0.2s;
        }
        .converter-card:hover {
            box-shadow: 0 12px 28px rgba(0,0,0,0.08);
        }
        .converter-title {
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
            color: #1e2a3e;
            border-left: 5px solid var(--primary-color, #2c7da0);
            padding-left: 1rem;
        }
        .converter-sub {
            color: #5f6c80;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }
        .output-area {
            background-color: #f8f9fc;
            border-radius: 0.5rem;
            padding: 1rem;
            font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
            font-size: 0.9rem;
            word-break: break-all;
            white-space: pre-wrap;
            border: 1px solid #e2e8f0;
        }
        .example-badge {
            cursor: pointer;
            background-color: #eef2ff;
            padding: 0.35rem 0.85rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-family: monospace;
            transition: 0.1s;
            display: inline-block;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .example-badge:hover {
            background-color: #d9e2ef;
            transform: translateY(-1px);
        }
        .conversion-note {
            background: #f0f7fa;
            padding: 1rem;
            border-radius: 12px;
            font-size: 0.9rem;
            margin-top: 1rem;
        }
        .badge-encoding {
            background-color: #1e2a3e;
            color: white;
            font-weight: normal;
        }
        hr {
            opacity: 0.5;
        }
        .code-block {
            background: #1e293b;
            color: #e2e8f0;
            padding: 1rem;
            border-radius: 12px;
            font-family: monospace;
            font-size: 0.85rem;
            overflow-x: auto;
        }
        .toast-custom {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: #1e2a3e;
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 0.9rem;
            z-index: 9999;
            opacity: 0;
            transition: opacity 0.2s ease;
            pointer-events: none;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        .toast-custom.show {
            opacity: 1;
        }
        .loading-spinner {
            display: inline-block;
            width: 1rem;
            height: 1rem;
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 0.6s linear infinite;
            margin-right: 0.5rem;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        .btn-loading {
            pointer-events: none;
            opacity: 0.7;
        }
        .inline-loader {
            display: none;
            margin-left: 0.5rem;
        }