:root {
            /* Tvoja PRO Paleta */
            --bg-body: #05080C;
            --bg-header: #080D14;
            --bg-card: #111822;
            --bg-input: #0b1016;
            --bg-highlight: #151F2B;
            
            --text-main: #F3F6FB;
            --text-sec: #A6B3C5;
            --text-muted: #7A8898;
            
            --brand-green: #00C853;
            --brand-green-hover: #009624;
            --soft-green: #1A3A2A;
            --text-on-soft: #58E09C;
            
            --color-danger: #EF4444;
            --color-warning: #F59E0B;
            --color-info: #3B82F6;
            --color-cmd: #F3F6FB;
            --color-arg: #00C853;
            --color-param: #FF9100;
            
            --border: 1px solid #1E293B;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0,0,0,0.5);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }

        body {
            background-color: var(--bg-body);
            color: var(--text-main);
            font-family: 'Inter', sans-serif;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Header */
        header {
            background: var(--bg-header);
            border-bottom: 1px solid #151F2B;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .brand { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.5px; color: var(--text-main); text-decoration: none; }
        .brand span { color: var(--brand-green); }

        /* Main Layout */
        main {
            flex: 1; padding: 2rem; max-width: 1400px; margin: 0 auto; width: 100%;
            display: grid; grid-template-columns: 280px 1fr; gap: 1.5rem;
        }
        @media (max-width: 900px) { main { grid-template-columns: 1fr; } }

        /* Sidebar (Command List) */
        .sidebar { display: flex; flex-direction: column; gap: 0.5rem; }
        
        .cat-title {
            color: var(--text-muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px;
            margin: 1.5rem 0 0.5rem 0; font-weight: 700; border-bottom: 1px solid #1E293B; padding-bottom: 5px;
        }
        .cat-title:first-child { margin-top: 0; }

        .cmd-btn {
            background: var(--bg-card); border: 1px solid transparent; color: var(--text-sec);
            padding: 10px 14px; border-radius: 8px; cursor: pointer; text-align: left;
            font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 0.9rem;
            transition: 0.2s; display: flex; justify-content: space-between; align-items: center;
        }
        .cmd-btn:hover { background: var(--bg-highlight); color: var(--text-main); }
        .cmd-btn.active { 
            background: var(--soft-green); color: var(--text-on-soft); border-color: var(--brand-green); 
        }
        .cmd-btn i { font-size: 0.8rem; opacity: 0.5; }

        /* Content Area */
        .builder-area { display: flex; flex-direction: column; gap: 1.5rem; }

        .card {
            background: var(--bg-card); border: var(--border); border-radius: var(--radius);
            padding: 1.5rem; box-shadow: var(--shadow);
        }

        h2 { font-size: 1.2rem; color: var(--text-main); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 10px; }
        .desc { color: var(--text-sec); font-size: 0.9rem; margin-bottom: 1.5rem; }

        /* Form Elements */
        .options-grid {
            display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem;
        }
        
        .opt-group {
            background: var(--bg-input); padding: 12px 15px; border-radius: 8px; border: 1px solid #1E293B;
            transition: 0.2s;
        }
        .opt-group:hover { border-color: #2A3B4C; }
        
        .opt-group label {
            display: flex; align-items: center; gap: 10px; cursor: pointer; color: var(--text-main); font-size: 0.9rem;
        }
        .opt-group input[type="checkbox"] {
            width: 18px; height: 18px; accent-color: var(--brand-green); cursor: pointer;
        }
        .opt-desc {
            display: block; font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; margin-left: 28px;
        }

        .input-group { margin-bottom: 1rem; }
        .input-label { display: block; color: var(--text-sec); font-size: 0.85rem; margin-bottom: 0.5rem; }
        input[type="text"], input[type="number"] {
            width: 100%; background: var(--bg-input); border: 1px solid #1E293B;
            color: var(--text-main); padding: 10px; border-radius: 8px; outline: none;
            font-family: 'JetBrains Mono', monospace; font-size: 0.9rem;
        }
        input:focus { border-color: var(--brand-green); }

        /* Terminal Preview */
        .terminal {
            background: #000; border: 1px solid #333; border-radius: 8px; padding: 1.5rem;
            font-family: 'JetBrains Mono', monospace; position: relative;
            margin-top: auto;
        }
        .terminal-header {
            position: absolute; top: 0; left: 0; right: 0; height: 24px; background: #1a1a1a;
            border-bottom: 1px solid #333; border-radius: 8px 8px 0 0; display: flex; align-items: center; padding-left: 10px; gap: 6px;
        }
        .dot { width: 10px; height: 10px; border-radius: 50%; }
        .dot.red { background: #FF5F56; } .dot.yellow { background: #FFBD2E; } .dot.green { background: #27C93F; }

        .cmd-display { margin-top: 15px; font-size: 1.1rem; line-height: 1.5; color: var(--color-cmd); word-break: break-all; }
        .prompt { color: var(--brand-green); margin-right: 8px; user-select: none; }
        .cursor { display: inline-block; width: 8px; height: 1.2rem; background: var(--brand-green); animation: blink 1s infinite; vertical-align: middle; }

        @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

        .explanation {
            margin-top: 1rem; padding: 1rem; background: rgba(59, 130, 246, 0.1); 
            border-left: 3px solid var(--color-info); border-radius: 4px; color: var(--text-sec); font-size: 0.9rem;
        }

        .action-row { display: flex; justify-content: flex-end; margin-top: 1rem; gap: 10px; }
        
        .copy-btn {
            background: var(--brand-green); color: #000; border: none; padding: 8px 16px; 
            border-radius: 6px; font-weight: 600; cursor: pointer; display: flex; align-items: center; gap: 8px;
            transition: 0.2s;
        }
        .copy-btn:hover { background: var(--brand-green-hover); }

        /* Syntax Colors */
        .c-cmd { color: var(--brand-green); font-weight: bold; }
        .c-flag { color: var(--color-info); }
        .c-arg { color: var(--color-param); }