* {
    box-sizing: border-box;
    scroll-behavior: smooth;
  }
  
  html, body {
    height: 100%;
    margin: 0;
    font-family: "Merriweather", "Georgia", serif;
    color: #1c2e2d;
    background: #ffffff;
    line-height: 1.8;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
  }
  
  /* ====== Header ====== */
  /* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 80px;
  background: #000; /* solid black */
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  z-index: 1000;
}

/* overlay behind header content */
.site-header::after {
  content: '';
  position: absolute;
  top:0; left:0;
  width:100%; height:100%;
  background: rgba(9,9,9,0.274);
  pointer-events: none; /* important: clicks pass through */
  z-index: 0;
}

/* header content container */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: relative;
  z-index: 10; /* ensure it's above overlay */
}

/* Logo */
.logo {
  font-family: "Playfair Display", serif;
  font-size: 2rem;
  color: #fff;
  margin: 0;
  letter-spacing: 0.5px;
}

/* Nav */
.nav {
  display: flex;
  gap: 1.5rem;
  z-index: 10; /* above overlay */
}

.nav a {
  text-decoration: none;
  font-weight: 600;
  color: #e4f2ec;
  position: relative;
  transition: all 0.3s ease;
}

.nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  left: 0;
  bottom: -4px;
  background: #b6d226;
  transition: width 0.3s;
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

.nav a:hover,
.nav a.active {
  color: #fbbc0e;
  text-shadow: 0 0 6px #4ec292,0 0 12px #028e8c;
}

/* Hamburger button */
.menu-toggle {
  display: none; /* hidden on desktop */
  background: none;
  border: none;
  font-size: 2.5rem;
  color: #e4f2ec;
  cursor: pointer;
  position: relative;
  z-index: 20; /* above overlay & nav */
}

/* ===== RESPONSIVE MOBILE ===== */
@media (max-width: 768px) {
  /* show hamburger */
  .menu-toggle {
    display: block;
  }

  /* hide nav by default */
  .nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    background: #303332;
    padding: 1rem 0;
    z-index: 15; /* below hamburger but above overlay */
  }

  /* show nav when toggled */
  .nav.show {
    display: flex;
  }

  .nav a {
    margin: 1rem 0;
    text-align: center;
  }
}


/* ====================== REVIEWS SECTION ====================== */
.reviews-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f0f8ff, #e6f2ff);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  
  /* Container centers everything and limits width */
  .reviews-section .container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  /* ====================== SECTION TITLE ====================== */
  .reviews-section h2 {
    text-align: center;
    font-size: 2.6rem;
    font-weight: 800;
    color: #013149;
    margin-top: 1rem;
    margin-bottom: 4rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    line-height: 1.2;
    background: linear-gradient(90deg, #008cff, #00bfa6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  /* ====================== REVIEWS GRID ====================== */
  .reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    width: 100%;
    justify-items: center; /* Centers cards inside grid */
    margin-bottom: 3rem;
  }
  
  /* ====================== REVIEW CARD ====================== */
  .review-card {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    transition: 0.3s ease;
    position: relative;     
    max-width: 350px;
    
    display: flex;
    flex-direction: column;
    /* Remove justify-content: space-between */
    justify-content: flex-start; /* aligns content to the top */
  }
  
  /* Corner star accent */
  .review-card::before {
    content: "⭐";
    font-size: 1.4rem;
    color: #0aa1b8;
    position: absolute;
    top: -10px;
    left: -6px;
  }
  
  /* Hover effect */
  .review-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 18px 36px rgba(0,0,0,0.15);
  }
  
  /* Author */
  .review-author {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #014f66;
    letter-spacing: 0.5px;
  }
  
  /* Text */
  .review-text {
    font-size: 1rem;
    color: #2b3c44;
    line-height: 1.65;
    letter-spacing: 0.25px;
    margin-bottom: 1rem;
  }
  
  /* ====================== HIGHLIGHT REVIEWS ====================== */
  .highlight-reviews {
    margin-top: 2rem;
    width: 100%;
    max-width: 800px;
    background: #ffffff;
    border-left: 5px solid #0aa1b8;
    padding: 2rem 2.2rem;
    border-radius: 14px;
    box-shadow: 0 14px 32px rgba(0,0,0,0.1);
    animation: fadeIn 0.8s ease forwards;
  }
  
  /* Highlight title */
  .highlight-reviews h3 {
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: #014f66;
    letter-spacing: 0.5px;
  }
  
  /* Pin marker */
  .highlight-reviews h3::before {
    content: "📌 ";
    font-size: 1.1rem;
  }
  
  /* Highlight text */
  .highlight-reviews p {
    margin-bottom: 1rem;
    color: #243338;
    line-height: 1.65;
    font-size: 1.02rem;
    letter-spacing: 0.25px;
  }
  
  .highlight-reviews p:last-child { margin-bottom: 0; }
  
  /* ====================== FADE ANIMATION ====================== */
  @keyframes fadeIn {
    from {opacity:0; transform: translateY(15px);}
    to {opacity:1; transform: translateY(0);}
  }
  
  /* ====================== RESPONSIVE ====================== */
  @media(max-width:1024px){
    .reviews-grid {
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    }
  }
  
  @media(max-width:768px){
    .highlight-reviews {
      padding: 1.6rem 1.8rem;
    }
  
    .reviews-section h2 {
      font-size: 2.2rem;
    }
  
    .review-card {
      padding: 1.8rem 1.6rem;
    }
  }
  /* ===== FOOTER ===== */
footer {
    background: #0b2f23;
    color: #ccc;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
  }
  footer p {
    margin: 0;
    font-size: 0.95rem;
  }
  
  /* ===== RESPONSIVE ===== */
  @media (max-width: 768px) {
    .book-card {
      flex-direction: column;
      text-align: center;
    }
    .book-card img {
      width: 80%;
      max-width: 280px;
    }
  }