* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6)),
    url("https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2072&q=80");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      circle at 20% 80%,
      rgba(120, 119, 198, 0.3) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(255, 119, 198, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 40% 40%,
      rgba(120, 219, 255, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
  z-index: 1;
}

.book-container {
  perspective: 1000px;
  position: relative;
  z-index: 2;
}

.book-container {
  perspective: 1000px;
  position: relative;
}

.book {
  width: 300px;
  height: 400px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.book:hover {
  transform: rotateY(-25deg);
}

.book-cover {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.6)),
    url("https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80");
  background-size: cover;
  background-position: center;
  border-radius: 15px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5),
    inset 0 2px 10px rgba(255, 255, 255, 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  transform-origin: left;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
  padding: 30px;
  z-index: 2;
  backdrop-filter: blur(5px);
}

.book:hover .book-cover {
  transform: rotateY(-160deg);
}

.book-spine {
  position: absolute;
  left: -10px;
  width: 20px;
  height: 100%;
  background: linear-gradient(145deg, #1a252f, #2c3e50);
  transform: rotateY(-90deg);
  transform-origin: right;
  border-radius: 0 0 0 15px;
}

.book-pages {
  position: absolute;
  width: calc(100% - 20px);
  height: 100%;
  right: 0;
  background: linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.322),
      rgba(240, 188, 136, 0.897)
    ),
    url("https://images.unsplash.com/photo-1513475382585-d06e58bcb0e0?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80");
  background-size: cover;
  background-position: center;
  backdrop-filter: blur(10px);
  border-radius: 0 15px 15px 0;
  padding: 30px;
  overflow-y: auto;
  box-shadow: inset 5px 0 15px rgba(0, 0, 0, 0.1),
    inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.cover-title {
  font-size: 2.5em;
  font-weight: bold;
  margin-bottom: 20px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 215, 0, 0.5);
  background: linear-gradient(45deg, #ffd700, #ffed4e, #ffffff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.3));
}

.cover-subtitle {
  font-size: 1.2em;
  opacity: 0.9;
  margin-bottom: 30px;
}

.cover-decoration {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, #ffd700, transparent);
  margin: 20px auto;
  border-radius: 2px;
}

.project-card {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.9),
    rgba(255, 255, 255, 0.8)
  );
  backdrop-filter: blur(15px);
  border-radius: 15px;
  padding: 25px;
  margin-bottom: 25px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-left: 5px solid #3498db;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(52, 152, 219, 0.03),
    rgba(155, 89, 182, 0.03)
  );
  z-index: -1;
}

.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15), 0 10px 25px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95),
    rgba(255, 255, 255, 0.9)
  );
}

.project-number {
  background: linear-gradient(135deg, #3498db, #2980b9);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2em;
  margin-bottom: 15px;
  box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.project-name {
  font-size: 1.4em;
  font-weight: bold;
  color: #2c3e50;
  margin-bottom: 10px;
}

.project-date {
  color: #7f8c8d;
  font-size: 0.9em;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.project-date::before {
  content: "📅";
  margin-right: 8px;
}

.project-link {
  display: inline-block;
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  color: white;
  text-decoration: none;
  padding: 12px 25px;
  border-radius: 25px;
  transition: all 0.3s ease;
  font-weight: 500;
  box-shadow: 0 5px 15px rgba(231, 76, 60, 0.3);
}

.project-link:hover {
  background: linear-gradient(135deg, #c0392b, #a93226);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.floating-elements {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

.floating-icon {
  position: absolute;
  opacity: 0.1;
  animation: float 6s ease-in-out infinite;
}

.floating-icon:nth-child(1) {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}
.floating-icon:nth-child(2) {
  top: 60%;
  right: 15%;
  animation-delay: 2s;
}
.floating-icon:nth-child(3) {
  bottom: 30%;
  left: 20%;
  animation-delay: 4s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

.page-header {
  text-align: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px solid #ecf0f1;
}

.page-title {
  font-size: 2em;
  color: #2c3e50;
  margin-bottom: 10px;
  font-weight: bold;
}

.page-subtitle {
  color: #7f8c8d;
  font-size: 1.1em;
}

@media (max-width: 768px) {
  .book {
    width: 280px;
    height: 370px;
  }

  .cover-title {
    font-size: 2em;
  }

  .project-card {
    padding: 20px;
  }
}