body {
        background-color: #000;
        color: #fff;
        font-family: 'Segoe UI', sans-serif;
    }

    .checker-container {
        min-height: 80vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 40px 20px;
    }

    form {
        background-color: #111;
        padding: 30px;
        border-radius: 12px;
        box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
        max-width: 400px;
        width: 100%;
        text-align: center;
    }

    input[type="text"] {
        width: 100%;
        padding: 10px 12px;
        border: none;
        border-radius: 8px;
        margin-bottom: 15px;
        font-size: 16px;
    }

    button {
        background: linear-gradient(45deg, #0ff, #09f);
        color: #000;
        padding: 10px 20px;
        font-weight: bold;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        transition: 0.3s ease;
    }

    button:hover {
        background: linear-gradient(45deg, #09f, #0ff);
        transform: scale(1.05);
    }

    table {
        margin-top: 20px;
        background-color: #111;
        border-collapse: collapse;
        width: 100%;
        max-width: 500px;
    }

    th, td {
        padding: 10px;
        border: 1px solid #333;
    }

    th {
        background-color: #222;
        color: #0ff;
    }

    .home-btn {
        position: absolute;
        top: 30px;
        left: 30px;
        background: none;
        border: 2px solid #0ff;
        color: #0ff;
        padding: 10px 20px;
        border-radius: 10px;
        font-weight: bold;
        text-decoration: none;
        transition: 0.3s ease;
        animation: pulse 2s infinite;
    }

    .home-btn:hover {
        background-color: #0ff;
        color: #000;
    }

    @keyframes pulse {
        0% { box-shadow: 0 0 0 0 rgba(0, 255, 255, 0.4); }
        70% { box-shadow: 0 0 0 15px rgba(0, 255, 255, 0); }
        100% { box-shadow: 0 0 0 0 rgba(0, 255, 255, 0); }
    }