/* ===== VÙNG NGOÀI SLIDER ===== */
.slide-video-hoatdong {
  width: 100%;
  margin: 0 auto;
  padding: 16px 0 48px;
  position: relative;
}

/* ===== SLICK SLIDER: GAP & CHỐNG TRÀN ===== */
.video-slider .slick-list {
  overflow: hidden;
  margin: 0 -12px; /* bù khoảng cách ngoài */
}
.video-slider .slick-slide {
  padding: 0 12px; /* tạo khoảng cách giữa các slide */
  box-sizing: border-box;
  outline: none;
}

/* ===== KHUNG VIDEO ===== */
.video-slider .video-item {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: #000;
  aspect-ratio: 16 / 9;
  width: 100%;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  transition: all 0.3s ease;
  margin: 0 1rem;
  transition: transform 0.4s ease, opacity 0.4s ease, filter 0.4s ease;

}
.video-slider .video-item iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 12px;
  display: block;
}

/* ===== HIỆU ỨNG MỜ: SLIDE KHÔNG Ở GIỮA ===== */
.video-slider .slick-slide .video-item {
  opacity: 0.2;
  transform: scale(0.92);
  filter: grayscale(20%) brightness(0.9);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

/* ===== HIỆU ỨNG RÕ NÉT: SLIDE Ở GIỮA ===== */
.video-slider .slick-center .video-item {
  opacity: 1;
  transform: scale(1.5);
  filter: none;
  z-index: 2;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
  transition: transform 0.4s ease, opacity 0.4s ease, filter 0.4s ease;

}

/* ===== DOTS (nếu cần) ===== */
.slick-dots {
  bottom: -24px;
}
.slick-dots li {
  margin: 0 4px;
}
.slick-dots li button:before {
  font-size: 10px;
  opacity: 0.35;
  color: #1F2251;
}
.slick-dots li.slick-active button:before {
  opacity: 1;
  color: #1F2251;
}

/* ===== NÚT ĐIỀU HƯỚNG DƯỚI ===== */
.btn-nav-video-bottom {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}
.btn-nav-video-bottom button {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: #1F2251;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}
.btn-nav-video-bottom button:hover {
  background: #D41616;
  transform: translateY(-2px);
}
.btn-nav-video-bottom img {
  width: 22px;
  height: 22px;
  filter: invert(1);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .video-slider .slick-list {
    margin: 0 -8px;
  }
  .video-slider .slick-slide {
    padding: 0 8px;
  }
  .btn-nav-video-bottom {
    gap: 12px;
    margin-top: 24px;
  }
  .btn-nav-video-bottom button {
    width: 40px;
    height: 40px;
  }
  .btn-nav-video-bottom img {
    width: 18px;
    height: 18px;
  }
}