/* Reset & base */
    * { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Helvetica Neue', sans-serif; }
    body { line-height: 1.6; color: #333; background: #fafafa; }

    /* Sections */
    section { padding: 120px 20px; text-align: center; }
    h1, h2 { line-height: 1.2; }

    /* Hero */
    .hero {
        background: linear-gradient(135deg,#6C63FF,#00C6FF);
        color: #fff;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: 160px 20px;
    }
    .hero h1 { font-size: 3rem; margin-bottom: 20px; }
    .hero p { font-size: 1.3rem; max-width: 700px; margin: 0 auto 40px; }
    .btn {
        padding: 15px 35px;
        font-size: 1.1rem;
        border: none;
        border-radius: 40px;
        cursor: pointer;
        background: #fff;
        color: #6C63FF;
        font-weight: bold;
        transition: 0.3s;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }
    .btn:hover { background: #f0f0ff; transform: translateY(-2px); }

    /* Use Cases */
    .use-cases {
        background: #fff;
    }
    .use-cases h2 { font-size: 2.2rem; margin-bottom: 20px; }
    .use-cases p { margin-bottom: 50px; font-size: 1.1rem; color: #555; }
    .checkbox-group {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 30px;
        max-width: 1000px;
        margin: 0 auto 40px;
    }
    .checkbox-group label {
        background: #f9f9ff;
        padding: 30px 20px;
        border-radius: 16px;
        cursor: pointer;
        flex: 1 1 220px;
        transition: 0.3s;
        box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .checkbox-group label:hover { transform: translateY(-3px); }
    .checkbox-group input { display: none; }
    .checkbox-group span {
        display: block;
        margin-top: 15px;
        font-weight: 600;
    }
    .checkbox-group input:checked ~ span {
        background: #6C63FF;
        color: #fff;
        padding: 12px 20px;
        border-radius: 12px;
    }
    .use-case-img {
        width: 80px; height: 80px;
        background: #e0e0ff;
        border-radius: 50%;
        margin-bottom: 15px;
    }

    /* Email Section */
    .email-section { background: #f0f4ff; }
    .email-section h2 { margin-bottom: 15px; font-size: 2rem; }
    .email-section p { margin-bottom: 30px; font-size: 1.1rem; color: #444; }
    .email-section input[type="email"] {
        padding: 18px;
        width: 340px;
        max-width: 90%;
        border-radius: 10px;
        border: 1px solid #ccc;
        margin-bottom: 20px;
        font-size: 1rem;
    }
    .success-message { margin-top: 20px; color: green; font-weight: bold; }

    /* Growth Ladder */
    .growth-ladder { background: #fff; }
    .growth-ladder h2 { margin-bottom: 20px; font-size: 2.2rem; }
    .growth-ladder p { margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
    .growth-placeholder {
        width: 100%;
        max-width: 900px;
        height: 400px;
        margin: 0 auto;
        background: #e8e8ff;
        border-radius: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #777;
        font-size: 1.2rem;
        font-weight: bold;
    }

    /* Footer */
    .footer {
        background: #333;
        color: #fff;
        padding: 60px 20px;
    }
    .footer a { color: #fff; margin: 0 10px; text-decoration: none; }
    .footer p { margin: 10px 0; }

    @media(max-width:768px){
        .checkbox-group { flex-direction: column; }
        .hero h1 { font-size: 2.2rem; }
    }