/* Reset and basic styling */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
  line-height: 1.6;
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
              url('assets/imgs/background.jpg') no-repeat center center/cover;
  color: #fff;
  text-align: center;
  padding: 120px 20px;
  margin-bottom: 0;
}

.hero h1 {
  font-size: 65px;
  font-weight: 500; /* More appropriate weight */
  margin-bottom: 0.3em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

.hero .subtitle {
  font-size: 50px;
  font-weight: 50;
  margin-bottom: 0.8em;
}

.hero .details {
  font-size: 1.3rem;
  opacity: 0.8;
  margin-bottom: 5px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.hero .details i {
  margin-right: 10px;
}


/* Main Content Container */
.container {
  /* max-width: 1200px; */
  /* margin: 30px auto; */
  background-color: #fff;
  padding: 30px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
}

/* Sections */
section {
  margin-bottom: 50px;
}
section h2 {
  border-bottom: 2px solid #007BFF;
  padding-bottom: 10px;
  margin-bottom: 20px;
  color: #007BFF;
}
section h3, section h4 {
  margin-top: 20px;
  color: #333;
}
p {
  margin: 15px 0;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}
table, th, td {
  border: 1px solid #ddd;
}
th, td {
  padding: 12px;
  text-align: left;
}
th {
  background-color: #f0f0f0;
}

/* Note in schedule */
.note {
  font-style: italic;
  color: #555;
}

/* Speakers Grid */
.speaker-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: stretch; /* Ensure all speakers are shown */
}
.speaker {
  flex: 1 1 200px;
  text-align: center;
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.speaker:hover {
  transform: scale(1.05);
}
/* .speaker img {
  border-radius: 50%;
  width: 150px;
  height: 150px;
  object-fit: cover;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s ease;
} */
 .speaker img {
  border-radius: 50%;
  width: 150px;
  height: 150px;
  object-fit: contain;  /* 不裁切头像 */
  background-color: #fff; /* 补充圆形背景 */
  padding: 5px; /* 让头像缩小一点，防止贴边 */
}
.speaker img:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Carousel Wrapper */
.carousel-wrapper {
  overflow: hidden;
  white-space: nowrap;
  font-size: 0;  /* Remove any extra whitespace between inline elements */
  animation: scroll 20s linear infinite;
  width: 100%; /* Ensure the carousel does not overflow */
  box-sizing: border-box; /* Include padding and border in the element's total width and height */
  display: flex; /* Ensure the carousel items are contained within the wrapper */
}

/* Organizers Carousel */
.organizers-carousel {
  display: flex;
  gap: 20px;
  font-size: 16px; /* Reset font size for the children */
  width: 100%; /* Ensure the carousel does not overflow */
  box-sizing: border-box; /* Include padding and border in the element's total width and height */
  overflow-x: auto; /* Allow horizontal scrolling */
  scroll-snap-type: x mandatory; /* Enable snap scrolling */
  padding-bottom: 20px; /* Add padding to avoid scrollbar overlap */
  justify-content: center; /* Center the carousel */
}

/* Organizer Card Styling */
.organizer {
  flex: 0 0 auto;
  width: 150px;
  text-align: center;
  transition: transform 0.3s ease;
  scroll-snap-align: center;
}

.organizer:hover {
  transform: scale(1.05);
}

/* .organizer img {
  border-radius: 50%;
  width: 125px;
  height: 125px;
  object-fit: cover;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s ease;
} */

.organizer img {
  border-radius: 50%;
  width: 125px;
  height: 125px;
  object-fit: contain; /* 保留完整头像，不裁剪 */
  background-color: #fff; /* 背景色填充空白区域 */
  padding: 5px; /* 给头像留点边距 */
}

.organizer img:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Keyframes for continuous scrolling */
/* 
  Adjust the -50% if you know the exact width of one set of organizers. 
  For a perfectly seamless loop, the translateX value should be equal to the total width 
  of one duplicate set of items.
*/
@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}


/* Responsive Design */
@media (max-width: 768px) {
  .speaker-grid {
    flex-direction: column;
    align-items: center;
  }
  .organizers-carousel {
    justify-content: flex-start; /* Align items to the start on mobile */
  }
}