* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
 
        body {
            font-family: Arial, Helvetica, sans-serif;
            background-color: #e8f0fe;
            color: #333;
            line-height: 1.6;
        }
 
        header {
            background-color: #1e3c72;
            color: white;
            text-align: center;
            padding: 40px 20px;
        }
 
        header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
 
        header h4 {
            font-size: 1rem;
            font-weight: normal;
            opacity: 0.85;
        }
 
        .container {
            width: 90%;
            max-width: 1100px;
            margin: 30px auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
 
        .card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
 
        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
        }
 
        .card h2 {
            margin-bottom: 15px;
            color: #1e3c72;
        }
 
        .card p {
            margin-bottom: 10px;
        }
 
        .card ul {
            padding-left: 20px;
        }
 
        .card ul li {
            margin-bottom: 8px;
        }
 
        .card.full-width {
            grid-column: 1 / -1;
        }
 
        /* Selektori grid */
        .selektori-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 12px;
            margin-top: 10px;
        }
 
        .sel-box {
            background: #f0f4ff;
            border-left: 4px solid #1e3c72;
            border-radius: 6px;
            padding: 12px 14px;
        }
 
        .sel-box code {
            display: block;
            font-family: "Courier New", monospace;
            font-size: 0.9rem;
            color: #c0392b;
            margin-bottom: 5px;
        }
 
        .sel-box p {
            font-size: 0.88rem;
            color: #555;
            margin: 0;
        }
 
        /* Gumbi */
        .kontrole {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 12px;
        }
 
        button {
            background: #1e3c72;
            color: white;
            border: none;
            padding: 10px 18px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.95rem;
            transition: background 0.3s ease, transform 0.2s ease;
        }
 
        button:hover {
            background: #16325c;
            transform: scale(1.05);
        }
 
        /* Demo element */
        #demo-element {
            margin-top: 16px;
            background: #eaf4ea;
            border: 2px solid #27ae60;
            border-radius: 8px;
            padding: 16px;
            text-align: center;
        }
 
        #demo-element p {
            color: #1e7e34;
            font-size: 1rem;
            margin: 0;
        }
 
        @media (max-width: 600px) {
            header h1 {
                font-size: 1.8rem;
            }
 
            .card.full-width {
                grid-column: 1;
            }
        }