body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #1f2c3a, #3e8dab);
  color: #fff;
  text-align: center;
}

header {
  padding: 25px;
  background: rgba(0, 0, 0, 0.2);
}

#toggleBtn {
  padding: 10px 20px;
  border: none;
  background: #fff;
  color: #333;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}
#toggleBtn:hover {
  background: #eee;
}

.slider-container {
  max-width: 800px;
  margin: 30px auto;
  background: #111;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  display: none;
}

.slider {
  position: relative;
  height: 400px;
}

.slide {
  display: none;
  width: 100%;
  height: 400px;
  object-fit: cover;
}
.slide.active {
  display: block;
}

.nav {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 10px;
  pointer-events: none; /* Allow buttons to go outside without breaking */
}

.nav button {
  pointer-events: auto; /* So buttons still work */
  z-index: 2;
}

.nav button:hover {
  background: #fff;
}

.dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 15px 0;
}
.dots span {
  width: 12px;
  height: 12px;
  background: #999;
  border-radius: 50%;
  display: inline-block;
  cursor: pointer;
  transition: 0.3s;
}
.dots span.active {
  background: #fff;
}

@media (max-width: 768px) {
  .slider-container {
    max-width: 95%;
  }
}