.demo-video {
    position: relative;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    border-radius: 14px;
    overflow: hidden;
    background: #0b2a3c;
    box-shadow: 0 24px 60px rgba(7, 27, 40, 0.28);
}

.demo-video iframe,
.demo-video-poster,
.demo-video-poster img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.demo-video-poster {
    padding: 0;
    cursor: pointer;
    background: none;
}

.demo-video-poster img {
    object-fit: cover;
    transition: transform 0.3s ease;
}

.demo-video-poster:hover img,
.demo-video-poster:focus-visible img {
    transform: scale(1.02);
}

.demo-video-play {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.45));
    transition: transform 0.2s ease;
}

.demo-video-poster:hover .demo-video-play {
    transform: translate(-50%, -50%) scale(1.1);
}

.demo-video-label {
    position: absolute;
    left: 50%;
    bottom: 1.25rem;
    transform: translateX(-50%);
    padding: 0.45rem 1rem;
    border-radius: 999px;
    background: rgba(7, 27, 40, 0.8);
    color: #fff;
    font: 600 0.95rem/1.2 Inter, -apple-system, sans-serif;
    white-space: nowrap;
}

.demo-video-chapters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin: 1.5rem auto 0;
    max-width: 960px;
}

.demo-video-chapters button {
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(15, 118, 110, 0.35);
    background: #fff;
    color: #0f766e;
    font: 600 0.9rem/1.2 Inter, -apple-system, sans-serif;
    cursor: pointer;
}

.demo-video-chapters button:hover {
    background: #f0fdfa;
}

.hero-watch-demo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.1rem;
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    opacity: 0.92;
}

.hero-watch-demo:hover {
    opacity: 1;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .demo-video { border-radius: 10px; }
    .demo-video-label { display: none; }
}