body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #fff8f0;
  overflow-x: hidden;
}

/* Sticker */
.sticker {
  position: fixed;
  top: -50px;
  width: 40px;
  height: 40px;
  background-size: cover;
  animation: fall linear forwards;
}
@keyframes fall {
  from { transform: translateY(-50px); opacity: 1; }
  to { transform: translateY(100vh); opacity: 0.8; }
}

/* Header + Nav */
header {
  background-color: #b30000;
  color: white;
  padding: 15px;
  text-align: center;
}
nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
}
nav ul li { margin: 0 10px; }
nav ul li a {
  display: block;
  padding: 10px 15px;
  background-color: #b30000;
  color: white;
  text-decoration: none;
  font-weight: bold;
  border-radius: 10px;
  border: 2px solid #006600;
  transition: background-color 0.3s, transform 0.2s;
}
nav ul li a:hover {
  background-color: #006600;
  transform: scale(1.05);
}

/* Banner */
.banner { position: relative; width: 100%; }
.banner img { width: 100%; height: auto; display: block; }
.overlay {
  position: absolute;
  top: 20%; left: 50%;
  transform: translateX(-50%);
  background-color: rgba(255, 255, 255, 0.8);
  padding: 20px;
  border-radius: 15px;
  text-align: center;
  max-width: 70%;
}
.overlay h2 { color: #b30000; }

/* Cards */
.cards {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 10px;
}
.card img { width: 100%; border-radius: 5px; }
.card a {
  display: block;
  padding: 10px 15px;
  background-color: #b30000;
  color: white;
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
  border: 2px solid #006600;
}
.card a:hover { background-color: #006600; }

/* Footer */
footer {
  background-color: #b30000;
  color: white;
  text-align: center;
  padding: 15px;
  border-radius: 10px;
  font-size: 14px;
  margin-top: 30px;
}

/* Giới thiệu */
.gioithieu {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 20px;
}


/* Info Card (dùng chung) */
.info-card {
  background: #fff;
  border: 2px solid #b30000;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  transition: transform 0.3s, background-color 0.3s;
}
.info-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 10px;
}
.info-card h2 { color: #b30000; margin-bottom: 10px; }
.info-card p { color: #333; line-height: 1.5; }
.info-card:hover { transform: translateY(-5px); background-color: #fff0f0; }

/* Modifier cho info-card */
.info-card.wide {
  width: 95%;
  background-color: #fff8e1;
  text-align: justify;
  font-size: 17px;
  line-height: 1.6;
}
.info-card.center { margin: 0 auto; width: 50%; }
.info-card.list ul {
  text-align: left;
  margin: 20px auto;
  max-width: 90%;
  padding-left: 20px;
}
.info-card.list li {
  margin-bottom: 10px;
  line-height: 1.6;
}

/* Video Section */
.video-section { margin-top: 40px; text-align: center; }
.video-section h2 { color: #b30000; margin-bottom: 20px; }
.video-box {
  display: flex;
  justify-content: center;
}
.video-box video, .video-box iframe {
  width: 80%;
  max-width: 800px;
  border: 3px solid #006600;
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

/* Phong tục */
.phongtuc {
  display: flex;
  flex-direction: column;
  gap: 30px;
  padding: 20px;
}
.big-box {
  background-color: #fff;
  border: 3px solid #b30000;
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.big-box h2 { color: #b30000; margin-bottom: 15px; text-align: center; }
.small-items {
  display: flex;
  justify-content: space-between;
  gap: 15px;
}
.small-item { flex: 1; text-align: center; }
.small-item img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-radius: 10px;
  border: 2px solid #006600;
  margin-bottom: 8px;
}
.small-item p { margin: 0; font-size: 15px; font-weight: bold; color: #333; }

/* Content Box (dùng chung) */
.content-box {
  background-color: rgba(255,255,255,0.9);
  border: 3px solid #b30000;
  border-radius: 15px;
  padding: 30px;
  margin: 40px auto;
  max-width: 1200px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.content-box.kyuc { max-width: 1000px; padding: 40px; background-color: rgba(255,255,255,0.95); }

/* Row (dùng chung) */
.row {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
}

/* Media & Image Box */
.media-box, .image-box {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}
.media-box img, .media-box video,
.image-box img {
  flex: 1;
  min-width: 250px;
  max-width: 100%;
  border-radius: 10px;
  border: 2px solid #006600;
  object-fit: cover;
}
.image-box img { width: 30%; }