.highlight-box {
  background-color: #E0FAFF; /* 水色の背景色 */
  padding: 10px;
  border-radius: 5px;
}

body {
    font-family: 'Noto Sans JP', 'Roboto', sans-serif;
    background-color: #f5f5f5; /* 薄いグレー */
    color: #000; /* 黒色の文字 */
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff; /* 背景色は白 */
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
    text-align: center;
    margin-bottom: 10px;
}

h3 {
    color: #800080; /* 強調色は紫 */
    font-size: 2em;
}

h4 {
    margin-top: 20px;
    color: #800080;
}


.schedule-day {
  margin-top: 10px;
  padding: 10px;
  border-left: 5px solid #800080;
  border-radius: 5px;
  background-color: #f9f9f9;
}

.schedule-day h5 {
  font-size: 1.5em;
  color: #800080;
  text-align: left;
  font-weight: bold;
  margin-bottom: 10px;
  margin-top: 0;
}

.schedule-card {
  background-color: #E0FAFF;
  padding: 8px;
  margin: 6px 0;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: relative;
}

.schedule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
}

.schedule-title {
  margin: 5px 0;
  color: #800080;
  font-size: 1em;
}

.schedule-speaker {
  color: #007BFF;
  font-weight: bold;
  margin-top: 3px;
}

.schedule-summary {
  font-size: 0.85em;
  color: #333;
  margin-top: 5px;
  overflow: hidden;
  position: relative;
  max-height: 1.5em; /* Approx. 2 lines */
  line-height: 1.5em;
  opacity: 0.8;
}

.schedule-summary::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1.5em;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, #f9f9f9 100%);
}

.schedule-card.expanded .schedule-summary {
  max-height: none;
  opacity: 1;
}

.schedule-card.expanded .schedule-summary::after {
  display: none;
}

.expand-button {
  border: none;
  position: center;
  padding: 5px 10px;
  margin-top: 10px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.85em;
}

.expand-button:hover {
}
    .break {
      background-color: #FFF5E0;
      border-left: 5px solid #FFA500;
      padding: 8px;
      margin: 6px 0;
      border-radius: 5px;
      text-align: left;
    }

    .poster-session {
      background-color: #E8F5E9;
      border-left: 5px solid #388E3C;
      padding: 8px;
      margin: 6px 0;
      border-radius: 5px;
      text-align: left;
    }

    .reception-card {
      background-color: #FFE6E6;
      border-left: 5px solid #FF6666;
      padding: 8px;
      margin: 6px 0;
      border-radius: 5px;
    }

    .tour-card {
      background-color: #E6E6FF;
      border-left: 5px solid #6666FF;
      padding: 8px;
      margin: 6px 0;
      border-radius: 5px;
      text-align: center;
      font-weight: bold;
    }

    .poster-list {
      padding: 0px;
    }

    .poster-list-item {
      display: flex;
      align-items: center;
      margin-bottom: 5px;
    }

    .poster-number {
      width: 50px;
      text-align: left;
      font-weight: bold;
      color: #FF69B4;
    }

    .poster-name {
      flex: 1;
      text-align: left;
      color: #333;
    }
    .poster-title {
      flex: 2;
      text-align: left;
      color: #555;
    }



    @media screen and (max-width: 600px) {
      .schedule-header {
        flex-direction: column;
        align-items: flex-start;
      }
    }


html {
  scroll-behavior: smooth;
}