:root {
            --primary-color: #4a90e2;
            --secondary-color: #5dade2;
            --accent-color: #e74c3c;
            --light-bg: #2e2e2e;
            --dark-text: #ffffff;
            --light-text: #787878;
            --border-color: #ecf0f1;
            --success-color: #2ecc71;
        }

        body {
            line-height: 1.6;
            color: var(--dark-text);
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
            background-color: var(--light-bg);
        }

        header {
            text-align: center;
            margin-bottom: 30px;
        }

        h1 {
            color: var(white);
            margin-bottom: 5px;
        }

        .subtitle {
            color: var(--light-text);
            font-size: 0.9em;
        }

        .container {
            background-color: rgba(255, 255, 255, 0.683);
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .card {
            padding: 25px;
            border-bottom: 1px solid var(--border-color);
        }

        .card:last-child {
            border-bottom: none;
        }

        .reference-type-selector {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-bottom: 20px;
        }

        .type-btn {
            background-color: var(--light-bg);
            border: 1px solid var(--border-color);
            color: var(--dark-text);
            padding: 10px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .type-btn:hover {
            background-color: #e9f0f6;
        }

        .type-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .type-btn .icon {
            font-size: 1.2em;
            margin-left: 8px;
        }

        .form-group {
            margin-bottom: 15px;
            display: flex;
            align-items: baseline;
        }

        .form-group label {
            width: 100px;
            font-weight: 500;
            color: var(--dark-text);
        }

        .form-group input {
            flex: 1;
            padding: 10px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-size: 0.95em;
        }

        .form-group .required:after {
            content: " *";
            color: var(--accent-color);
        }

        .generate-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 0.95em;
            transition: background-color 0.3s;
        }

        .generate-btn:hover {
            background-color: #3a7bc8;
        }

        .btn-group {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .btn {
            padding: 10px 15px;
            border-radius: 5px;
            border: none;
            cursor: pointer;
            font-size: 0.9em;
            transition: all 0.3s;
        }

        .btn-secondary {
            background-color: var(--light-bg);
            color: var(--dark-text);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background-color: #e9f0f6;
        }

        .btn-success {
            background-color: var(--success-color);
            color: white;
        }

        .btn-success:hover {
            background-color: #27ae60;
        }

        .result-area {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px dashed var(--border-color);
        }

        .result-title {
            font-weight: 500;
            margin-bottom: 10px;
            color: var(--primary-color);
        }

        .reference-output {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: 5px;
            border-left: 3px solid var(--primary-color);
            margin-bottom: 10px;
            white-space: pre-wrap;
        }

        .action-btns {
            display: flex;
            gap: 10px;
            margin-top: 10px;
        }

        .more-tools {
            text-align: center;
            margin: 30px 0;
        }

        .more-tools-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 0.9em;
            display: inline-flex;
            align-items: center;
            transition: background-color 0.3s;
        }

        .more-tools-btn:hover {
            background-color: #4a8bc2;
        }

        .more-tools-btn .icon {
            margin-left: 8px;
        }

        footer {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            color: var(--light-text);
            font-size: 0.9em;
        }

        footer a {
            color: var(--primary-color);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        .toggle-option {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 15px;
        }

        .toggle-option label {
            width: auto;
        }

        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--border-color);
            transition: .4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked+.slider {
            background-color: var(--success-color);
        }

        input:checked+.slider:before {
            transform: translateX(26px);
        }

        @media (max-width: 768px) {
            .reference-type-selector {
                grid-template-columns: 1fr;
            }

            .form-group {
                flex-direction: column;
                align-items: flex-start;
            }

            .form-group label {
                width: 100%;
                margin-bottom: 5px;
            }
        }