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

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    max-width: 820px;
    background: #fff;
    border-radius: 20px;
    padding: 56px 44px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
    text-align: center;
}

h1 {
    font-size: 44px;
    color: #111827;
    margin-bottom: 14px;
    font-weight: 800;
}

.subtitle {
    font-size: 19px;
    color: #6b7280;
    margin-bottom: 40px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-bottom: 36px;
    text-align: left;
}

.feature {
    padding: 22px;
    background: #f8f9fc;
    border-radius: 14px;
    border-left: 4px solid #4f46e5;
}

.feature-icon {
    font-size: 28px;
    margin-bottom: 10px;
}

.feature h3 {
    font-size: 16px;
    color: #111827;
    margin-bottom: 6px;
}

.feature p {
    font-size: 13.5px;
    color: #6b7280;
    line-height: 1.55;
}

.cta {
    margin-top: 32px;
    padding: 30px;
    background: linear-gradient(135deg, #4f46e5 0%, #1e1b4b 100%);
    border-radius: 14px;
    color: white;
}

.cta h2 {
    font-size: 22px;
    margin-bottom: 10px;
}

.cta p {
    font-size: 15px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.chat-button {
    background: #fff;
    color: #4f46e5;
    border: none;
    padding: 13px 30px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 10px;
    cursor: pointer;
    transition:
        transform 0.2s,
        box-shadow 0.2s;
}

.chat-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
}

.code-block {
    background: #0f172a;
    color: #e2e8f0;
    padding: 22px;
    border-radius: 12px;
    text-align: left;
    margin-top: 30px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 13px;
    overflow-x: auto;
}

.code-block code {
    display: block;
    white-space: pre;
}

@media (max-width: 768px) {
    .container {
        padding: 36px 22px;
    }

    h1 {
        font-size: 32px;
    }

    .features {
        grid-template-columns: 1fr;
    }
}