body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #000;
  text-align: center;
  scroll-behavior: smooth;
  background-color: #d84315;
  overflow-x: hidden;
}

#backButton {
  position: fixed;
  top: 20px;
  left: 20px;
  background-color: rgba(255, 140, 0, 0.7);
  color: #000;
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 1em;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  z-index: 1000;
}
#backButton:hover {
  background-color: rgba(255, 140, 0, 0.95);
  transform: scale(1.05);
}

header {
  padding: 30px 15px;
  background-color: #000;
  box-shadow: 0 4px 10px rgba(0,0,0,0.7);
}
header h1 {
  margin: 0;
  font-size: 2.2em;
  letter-spacing: 1px;
  color: #ff8c42;
}
header p {
  font-size: 1em;
  margin-top: 6px;
  font-style: italic;
  opacity: 0.9;
  color: #ff8c42;
}

.video-section {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 30px 10px;
  gap: 15px;
}
.video-card {
  background-color: rgba(255, 140, 0, 0.25);
  border-radius: 12px;
  width: 90%;
  max-width: 320px;
  padding: 12px;
  box-shadow: 0 6px 16px rgba(255,140,0,0.25);
  transition: transform 0.4s, box-shadow 0.4s;
  opacity: 0;
  transform: translateY(20px);
}
.video-card:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 22px rgba(255,140,0,0.4);
}
.video-card iframe {
  width: 100%;
  border-radius: 8px;
  height: 180px;
}
.video-title {
  font-size: 1.1em;
  font-weight: bold;
  margin-top: 10px;
  color: #000;
}
.video-desc {
  font-size: 0.9em;
  margin-top: 4px;
  color: #000;
}

footer {
  padding: 15px;
  font-size: 0.85em;
  background: rgba(255, 140, 0, 0.3);
  margin-top: 30px;
  box-shadow: 0 -4px 8px rgba(255,140,0,0.25);
}

#backToTop {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #000;
  color: #ff8c42;
  padding: 10px 0;
  width: 50px;
  border-radius: 25px;
  font-size: 1.6em;
  cursor: pointer;
  text-align: center;
  transition: background 0.3s, transform 0.3s;
  z-index: 999;
}
#backToTop:hover {
  background-color: #222;
  transform: translateX(-50%) scale(1.1);
}

@media (min-width: 768px) {
  .video-section { gap: 20px; }
  .video-card { width: 45%; }
}
@media (min-width: 1024px) {
  .video-card { width: 30%; }
}