body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background: #f6f5fb;
  color: #000;

  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  overflow: auto;
}

header {
  background: #f6f5fb;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  font-weight: bold;
  font-size: 1.5rem;
  color: #000;
}

nav a {
  margin-left: 1rem;
  color: #000;
  text-decoration: none;
  font-weight: bold;
 }
 .coffee-link {
    position: absolute;
    top: 10px;
    left: 15px;
    display: inline-block;
    text-decoration: none;
    font-weight: bold;
  }
  .coffee-link:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
  }
  
.hero {
  background: #ff6f00;
  text-align: center;
  padding: 3rem 2rem;
  color: #fff;
}

.categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  background: #f6f5fb;
  padding: 2rem;
}

.card {
  margin: 1rem;
  padding: 1.5rem;
  border-radius: 8px;
  width: 250px;
  background: #fff;
  color: #000;
  text-align: center;
  border: 3px solid #512da8;
}

.card .icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.card button {
  display: block;
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.5rem;
  background: #512da8;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
 .book-section {
      background-color: #f6f5fb;
      padding: 2rem;
      text-align: center;
    }
    .book-section h2 {
      margin-bottom: 1.5rem;
    }
    .book-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1.5rem;
    }
    .book {
      flex: 1 1 240px;
      max-width: 300px;
      transition: transform 0.2s ease-in-out;
    }
    .book:hover {
      transform: scale(1.05);
    }
    .book img {
      max-width: 200px;
      height: auto;
      border-radius: 4px;
      display: block;
      margin: 0 auto;
    }
    .book-title {
      margin-top: 0.5rem;
      font-weight: bold;
      text-align: center;
    }

     .video-section {
      background-color: #f6f5fb;
      padding: 2rem;
      text-align: center;
    }
    .video-section h2 {
      margin-bottom: 1.5rem;
    }
    .note {
      font-size: 0.85rem;
    }
    .video-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 2rem;
    }
    .video {
      flex: 1 1 320px;
      max-width: 480px;
    }
    .video-title {
      font-size: 1rem;
      margin-bottom: 0.5rem;
      color: #000;
    }
    .video iframe {
      width: 100%;
      aspect-ratio: 16 / 9;
      border: none;
    }


#pdfContainer {
  position: relative;
  width: 100%;
  height: 600px;
  border: 1px solid #ccc;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

#pdfContainer.fullscreen {
  position: fixed !important;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  background: #000;
  z-index: 9999;
  overflow: auto !important;
}

#pdfFrame {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
  pointer-events: auto;
  user-select: none;
}

#overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  z-index: 10;
  cursor: default;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

section p {
  font-size: 18px;
  line-height: 1.8;
}

.info-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  padding: 2rem;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.info-blocks > div {
  background: #fff;
  border: 1px solid #512da8;
  padding: 1rem;
  box-sizing: border-box;
  border-radius: 8px;
  margin: 0;
}

@media (max-width: 768px) {
  .info-blocks {
    flex-direction: column;
    align-items: center;
    padding: none;
  }

  .info-blocks > div {
    max-width: 95%;
  }
}
.useful-links a {
  color: #000; /* ή άλλο χρώμα, π.χ. #512da8 για μοβ */
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.useful-links a:hover {
  color: #e65100; /* πορτοκαλί στο hover, όπως και αλλού */
}
    
.bmac-img {
    height: 50px;
    border-radius: 8px;
    transition: transform 0.3s ease;
  }


  .tooltip-text {
    visibility: hidden;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 4px;
    padding: 6px 8px;
    position: absolute;
    z-index: 10;
    top: 120%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    white-space: nowrap;
    font-size: 0.9rem;
  }

   @media (max-width: 768px) {
    .bmac-img {
      height: 33px;
    }
    }
  footer {
  background:#f6f5fb;
  text-align: center;
  padding: 1rem;
  margin-top: 1rem;
  color: #000;
}