body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: #f5f5f7;
  color: #333;
}

/* HERO BLOCK */
.hero {
  display: flex;
  gap: 40px;
  padding: 60px 7%;
  align-items: center;
  background: linear-gradient(135deg, #fff, #f0f3ff);
}

.book-3d {
  width: 340px;
  filter: drop-shadow(0 25px 25px rgba(0,0,0,0.2));
  transform: perspective(900px) rotateY(-18deg) rotateX(4deg);
  transition: 0.5s ease;
}

.book-3d:hover {
  transform: perspective(900px) rotateY(-10deg) rotateX(0deg) scale(1.03);
}

.hero-right h1 {
  font-size: 42px;
  line-height: 1.2;
}

.hero-right span {
  color: #6776fd;
}

.author {
  margin-top: 15px;
  font-size: 20px;
  opacity: 0.8;
}

.intro {
  margin-top: 20px;
  font-size: 18px;
  max-width: 500px;
}

/* BLOCKS */
.block {
  padding: 70px 7%;
  background: #fff;
  margin-top: 20px;
  border-radius: 20px;
}

.block.colored {
  background: #eef0ff;
}

.block h2 {
  font-size: 32px;
  margin-bottom: 20px;
  color: #434bc5;
}

.block ul {
  line-height: 1.8;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 15px;
  margin-top: 20px;
}

.features div {
  background: #eef0ff;
  padding: 15px;
  border-radius: 12px;
  text-align: center;
  font-size: 18px;
}

/* FORM */
.form-section {
  padding: 70px 7%;
  text-align: center;
}

form {
  max-width: 500px;
  margin: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input, textarea {
  padding: 15px;
  border: 2px solid #dcdcff;
  border-radius: 12px;
  font-size: 16px;
}

.send-btn {
  padding: 15px;
  background: #4a55ff;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 18px;
  transition: 0.3s;
}

.send-btn:hover {
  background: #343dcc;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 30px;
  opacity: 0.7;
  font-size: 14px;
}