/* ── BOOK PROMO ───────────────────────── */

.book-promo{
  margin-top:40px;
  border:1px solid #1a2235;
  background:linear-gradient(135deg,#0f1520,#141a28);
  border-radius:10px;
  padding:24px;
  display:flex;
  gap:22px;
  align-items:center;
  position:relative;
  overflow:hidden;
  box-shadow:
    0 10px 40px rgba(0,0,0,.6),
    0 0 0 1px rgba(88,166,255,.08),
    0 0 25px rgba(0,120,212,.12);
  transition:all .25s ease;
}

.book-promo:hover{
  transform:translateY(-2px);
  box-shadow:
    0 15px 50px rgba(0,0,0,.8),
    0 0 0 1px rgba(88,166,255,.12),
    0 0 35px rgba(0,120,212,.2);
}

.book-promo::before{
  content:"";
  position:absolute;
  top:-60px;
  right:80px;
  width:220px;
  height:220px;
  background:radial-gradient(circle, rgba(88,166,255,.15) 0%, transparent 70%);
  pointer-events:none;
}

.book-promo img{
  width:105px;
  max-width:100%;
  height:auto;
  display:block;
  border-radius:6px;
  box-shadow:0 6px 28px rgba(0,0,0,.7);
}

.book-body{
  flex:1;
  min-width:0;
}

.book-body h3{
  font-family:'DM Serif Display',serif;
  font-size:1.35rem;
  line-height:1.3;
  color:#ffffff;
  margin-bottom:8px;
}

.book-body p{
  font-size:0.95rem;
  color:#b8c4d8;
  line-height:1.75;
  margin:0 0 10px 0;
}

.book-body ul{
  margin:10px 0 0 18px;
  padding:0;
  color:#b8c4d8;
}

.book-body li{
  margin-bottom:6px;
  line-height:1.6;
}

.book-btn{
  display:inline-block;
  margin-top:10px;
  margin-right:8px;
  background:linear-gradient(135deg,#0078d4,#00b4d8);
  color:#fff;
  padding:8px 18px;
  border-radius:4px;
  font-size:0.78rem;
  text-decoration:none;
  font-weight:600;
  transition:all .2s ease;
}

.book-btn:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(0,180,216,.35);
}

/* ── MOBILE FIX ───────────────────────── */

@media (max-width: 700px){
  .book-promo{
    flex-direction:column;
    align-items:flex-start;
    padding:20px;
    gap:16px;
  }

  .book-promo::before{
    right:20px;
    top:-70px;
    width:160px;
    height:160px;
  }

  .book-promo img{
    width:120px;
  }

  .book-body{
    width:100%;
  }

  .book-body h3{
    font-size:1.9rem;
    line-height:1.25;
  }

  .book-body p,
  .book-body ul,
  .book-body li{
    font-size:0.98rem;
  }

  .book-btn{
    display:inline-block;
    margin-right:8px;
    margin-bottom:8px;
  }
}

@media (max-width: 480px){
  .book-promo{
    padding:18px;
    border-radius:8px;
  }

  .book-promo img{
    width:110px;
  }

  .book-body h3{
    font-size:1.65rem;
  }

  .book-body p,
  .book-body ul,
  .book-body li{
    font-size:0.92rem;
    line-height:1.7;
  }

  .book-btn{
    width:auto;
    font-size:0.76rem;
    padding:8px 14px;
  }
}