:root {
            --primary: #00e5ff;
            --secondary: #9d00ff;
            --bg-deep: #0a0a0c;
            --card-bg: rgba(20, 20, 25, 0.6);
            --glass-border: rgba(255, 255, 255, 0.08);
            --text-main: #f0f0f0;
            --text-muted: #888899;
            --accent-success: #00ff7f;
            --accent-warning: #ffb700;
            --input-bg: rgba(0, 0, 0, 0.4);
            --input-border: rgba(255, 255, 255, 0.15);
            --checkbox-bg: rgba(0, 0, 0, 0.2);
            --preview-bg: #000;
            --preview-border: #333;
            --code-bg: #111;
            --code-border: #222;
            --code-color: #a8cc7c;
        }

        /* Button Variants */
        .btn-clear {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            color: var(--text-muted);
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.75rem;
            margin-top: 0.75rem;
            display: inline-block;
            transition: all 0.2s ease;
        }

        .btn-clear:hover {
            background: rgba(255, 50, 50, 0.15);
            border-color: rgba(255, 0, 0, 0.4);
            color: #ff4d4d;
        }

        .optional {
            color: var(--text-muted);
            font-size: 0.75rem;
            opacity: 0.6;
            margin-left: 0.3rem;
        }

        body.light-mode {
            --primary: #0077cc;
            --secondary: #6e00ff;
            --bg-deep: #f0f4f8;
            --card-bg: rgba(255, 255, 255, 0.85);
            --glass-border: rgba(0, 0, 0, 0.1);
            --text-main: #1a1a1a;
            --text-muted: #555566;
            --accent-success: #009933;
            --accent-warning: #cc7000;
            --input-bg: rgba(255, 255, 255, 0.6);
            --input-border: rgba(0, 0, 0, 0.2);
            --checkbox-bg: rgba(255, 255, 255, 0.4);
            --preview-bg: #fff;
            --preview-border: #ccc;
            --code-bg: #f8f9fa;
            --code-color: #1a1a1a;
        }



        .btn-copy {
            background: var(--primary);
            color: #000;
            border: none;
            padding: 0.3rem 0.7rem;
            border-radius: 4px;
            font-size: 0.75rem;
            cursor: pointer;
            font-weight: 700;
            transition: transform 0.2s, background 0.2s;
        }

        .btn-copy:hover {
            background: #00fff2;
            transform: translateY(-1px);
        }

        .btn-copy:active {
            transform: translateY(0);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: var(--font-sans);
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: flex-start;
            padding: 3rem 1rem;
            background-image: radial-gradient(circle at 15% 50%, rgba(157, 0, 255, 0.08), transparent 30%),
                radial-gradient(circle at 85% 30%, rgba(0, 229, 255, 0.08), transparent 30%);
            overflow-x: hidden;
            transition: background-color 0.4s ease, color 0.4s ease;
        }

        .preview-box.full-width {
            max-width: 100% !important;
            width: 100% !important;
        }

        .btn-secondary {
            border: 1px solid var(--glass-border);
            color: var(--text-main);
            padding: 0.8rem 1.5rem;
            border-radius: 12px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--primary);
        }

        .container {
            width: 100%;
            max-width: 1000px;
            position: relative;
            z-index: 10;
        }

        header {
            text-align: center;
            margin-bottom: 2.5rem;
            position: relative;
        }

        .header-actions {
            position: absolute;
            top: 0;
            right: 0;
            display: flex;
            gap: 0.8rem;
        }

        .theme-toggle {
            background: var(--card-bg);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            cursor: pointer;
            backdrop-filter: blur(10px);
            font-size: 0.9rem;
            transition: all 0.3s;
        }

        .theme-toggle:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        h1 {
            font-weight: 800;
            font-size: 3rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -1px;
            margin-bottom: 0.5rem;
        }

        .subtitle {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* Tabs */
        .tabs {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
            background: rgba(0, 0, 0, 0.4);
            padding: 0.5rem;
            border-radius: 100px;
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(10px);
        }

        .tab-btn {
            background: transparent;
            color: var(--text-muted);
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 100px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }

        .tab-btn:hover {
            color: var(--text-main);
        }

        .tab-btn.active {
            background: rgba(255, 255, 255, 0.1);
            color: var(--primary);
            box-shadow: inset 0 0 10px rgba(0, 229, 255, 0.1);
        }

        .tab-pane {
            display: none;
            animation: fadeIn 0.4s ease forwards;
        }

        .tab-pane.active {
            display: block;
        }

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

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Card Layout */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(24px);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            padding: 2.5rem;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
        }

        .section-title {
            font-size: 1.3rem;
            color: white;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--glass-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .input-group {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .full-width {
            grid-column: span 2;
        }

        label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }

        input[type="text"],
        input[type="number"],
        input[type="password"],
        select,
        textarea {
            background: var(--input-bg);
            border: 1px solid var(--input-border);
            border-radius: 12px;
            padding: 0.9rem 1rem;
            color: var(--text-main);
            font-size: 1rem;
            transition: all 0.2s ease;
            width: 100%;
        }

        textarea {
            resize: vertical;
            min-height: 100px;
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }

        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
        }

        .hint {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: -0.3rem;
        }

        /* Checkboxes */
        .checkbox-group {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            background: var(--checkbox-bg);
            padding: 1.5rem;
            border-radius: 12px;
            border: 1px dashed var(--glass-border);
        }

        .checkbox-label {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            cursor: pointer;
            font-size: 0.9rem;
            color: var(--text-main);
            text-transform: none;
            letter-spacing: 0;
            font-weight: 400;
        }

        .checkbox-label input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: var(--primary);
        }

        /* Generate Button */
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #0077ff);
            color: #000;
            border: none;
            padding: 1.2rem 3rem;
            font-size: 1.1rem;
            font-weight: 800;
            border-radius: 16px;
            cursor: pointer;
            width: 100%;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1rem;
            box-shadow: 0 10px 30px rgba(0, 229, 255, 0.2);
        }

        .btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 229, 255, 0.4);
            color: white;
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .btn-small {
            background: var(--input-bg);
            border: 1px solid var(--glass-border);
            color: var(--text-main);
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            font-size: 0.75rem;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .btn-small:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        /* Loader */
        .loader {
            display: none;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(0, 0, 0, 0.1);
            border-top-color: #000;
            border-radius: 50%;
            animation: spin 1s infinite linear;
        }

        .btn-primary:hover .loader {
            border-top-color: #fff;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        /* Preview Area */
        .preview-box {
            margin-top: 2rem;
            background: var(--preview-bg);
            border: 1px solid var(--preview-border);
            border-radius: 12px;
            padding: 1.5rem;
            display: none;
        }

        .preview-header {
            color: var(--accent-success);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }

        .code-block {
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--code-color);
            white-space: pre-wrap;
            background: var(--code-bg);
            padding: 1rem;
            border-radius: 8px;
            max-height: 250px;
            overflow-y: auto;
            border: 1px solid var(--code-border);
        }

        .status-msg {
            margin-top: 1rem;
            text-align: center;
            color: var(--accent-warning);
            min-height: 1.5rem;
            font-size: 0.9rem;
        }