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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        padding: 20px;
    }

    .demo-content {
        text-align: center;
        color: #fff;
        max-width: 600px;
        margin: auto;
    }

    .chat-avatar-big {
        width: 200px;
        height: 200px;
        border-radius: 50%;
        border: 3px solid #fff;
        object-fit: cover;
    }

    .demo-content h1 {
        font-size: 48px;
        margin-bottom: 20px;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .demo-content p {
        font-size: 20px;
        opacity: 0.9;
        line-height: 1.6;
    }

    /* ===== Carrossel "Nossos clientes" ===== */
    .clients {
        width: 100%;
        max-width: 900px;
        margin: 0 auto;
        padding: 10px 0 0;
        color: #fff;
        text-align: center;
    }

    .clients h2 {
        font-size: 18px;
        font-weight: 600;
        letter-spacing: 0.3px;
        margin-bottom: 10px;
        opacity: 0.95;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    }

    .carousel {
        position: relative;
        overflow: hidden;
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.10);
        border: 1px solid rgba(255, 255, 255, 0.18);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }

    .track {
        display: flex;
        transition: transform 450ms ease;
        will-change: transform;
    }

    .slide {
        flex: 0 0 100%;
        padding: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .client-card {
        width: 100%;
        max-width: 520px;
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 14px 16px;
        border-radius: 14px;
        text-decoration: none;
        color: #fff;
        background: rgba(0, 0, 0, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.18);
        transition: transform 160ms ease, background 160ms ease;
    }

    .client-card:hover {
        transform: translateY(-2px);
        background: rgba(0, 0, 0, 0.18);
    }

    .client-logo {
        width: 52px;
        height: 52px;
        border-radius: 12px;
        background: #fff;
        object-fit: cover;
        flex: 0 0 auto;
    }

    .client-info {
        text-align: left;
        line-height: 1.2;
    }

    .client-name {
        font-weight: 700;
        font-size: 16px;
        margin-bottom: 4px;
    }

    .client-desc {
        font-size: 13px;
        opacity: 0.9;
    }

    .dots {
        display: flex;
        justify-content: center;
        gap: 8px;
        padding: 10px 0 12px;
    }

    .dot {
        width: 8px;
        height: 8px;
        border-radius: 99px;
        background: rgba(255, 255, 255, 0.35);
        border: 1px solid rgba(255, 255, 255, 0.35);
        cursor: pointer;
    }

    .dot.active {
        background: #fff;
        border-color: #fff;
    }

    @media (max-width: 520px) {
        .demo-content h1 {
            font-size: 38px;
        }

        .client-card {
            max-width: 100%;
        }
    }