body, ul {
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Segoe UI', sans-serif;
  background: #f8f8f8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main, .container, .contact-section, .about-section, section {
  flex: 1 0 auto;
}

/* Header container */
.main-header {
  width: 100vw;
  max-width: 100vw;
  left: 0;
  right: 0;
  margin: 0;
  border-radius: 0 0 16px 16px;
  box-sizing: border-box;
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 40px;
  background: linear-gradient(135deg, #232526, #2c3e50, #fbbf24);
  background-size: 400% 400%;
  animation: gradientMove 10s ease infinite;
}

@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Logo */
.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  font-size: 2rem;
  background: #fbbf24;
  border-radius: 50%;
  padding: 6px 12px;
  color: #222;
  animation: bounce 1.5s infinite alternate;
}
@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-5px); }
}
.logo-text {
  font-size: 1.6rem;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
}
.logo-highlight {
  color: #fbbf24;
  font-weight: 800;
}

/* Nav styles */
nav ul {
  display: flex;
  list-style: none;
  gap: 24px;
}
nav ul li a {
  color: white;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: background 0.3s;
}
nav ul li a:hover {
  background: #fbbf24;
  color: #222;
}

/* Donate special button */
.donate-btn {
  background: #fbbf24;
  color: #222 !important;
  font-weight: bold;
  border-radius: 20px;
}
.donate-btn:hover {
  background: #fff;
  color: #fbbf24 !important;
  border: 1px solid #fbbf24;
}

/* Hamburger menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  width: 30px;
  height: 26px;
  justify-content: space-between;
  cursor: pointer;
}
.menu-toggle div {
  height: 4px;
  background: white;
  border-radius: 2px;
  transition: 0.4s;
}

/* Overlay for mobile nav */
.overlay {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.4);
  z-index: 900;
}
.overlay.active {
  display: block;
}

/* Responsive Styles */
@media (max-width: 900px) {
  .menu-toggle {
    display: flex;
  }

  nav ul {
    position: fixed;
    top: 0; right: -100%;
    flex-direction: column;
    background: rgb(0, 0, 0);
    width: 70%;
    height: 100vh;
    padding-top: 80px;
    padding-left: 24px;
    gap: 18px;
    transition: right 0.3s ease;
    z-index: 999;
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
  }
  nav ul {
    padding-top: 60px !important; /* Add margin at the top for hamburger menu */
  }

  nav ul.open {
    right: 0;
  }

  nav ul li a {
    color: #ffffff;
    font-size: 1.1rem;
    padding: 12px 0;
  }

  .donate-btn {
    background: #fbbf24;
    color: #222;
    padding: 10px 16px;
  }

  .main-header {
    padding: 20px 24px;
  }
}

@media (max-width: 1000px) {
  .main-header {
    padding: 16px 10px;
    width: 100vw;
    max-width: 100vw;
    border-radius: 0 0 16px 16px;
  }
}

/* Hamburger Animation */
.menu-toggle.open div:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.open div:nth-child(2) {
  opacity: 0;
}
.menu-toggle.open div:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}
    :root {
      --bg-color: #ffffff;
      --text-primary: #111827;
      --text-secondary: #6b7280;
      --accent-color: #fbbf24;
      --border-radius: 0.75rem;
      --shadow-light: 0 6px 18px rgba(0, 0, 0, 0.1);
      --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      --transition: 0.3s ease;
    }
    html, body {
      overflow-x: hidden !important;
      background: linear-gradient(180deg, #fbbf24 0%, #000000 100%);
    }
    body {
      margin: 0;
      background-color: #f8f5f0;
      font-family: var(--font-family);
      color: var(--text-primary);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 0;
      line-height: 1.5;
    }
    main.container {
      max-width: 900px;
      width: 100%;
      min-width: 320px;
      background: var(--bg-color);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-light);
      padding: 40px 32px;
      margin-top: 15px;
      display: flex;
      gap: 40px;
      align-items: flex-start;
      margin-bottom: 40px;
      position: relative;
      animation: fadeIn 0.7s;
      box-sizing: border-box;
      position: relative;
      padding-top: 60px;
    }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(30px);}
      to { opacity: 1; transform: none;}
    }
    .book-img {
      width: 220px;
      min-width: 220px;
      max-width: 220px;
      height: 330px;
      object-fit: cover;
      border-radius: var(--border-radius);
      box-shadow: 0 4px 16px rgba(0,0,0,0.10);
      background: #f3f1eb;
      align-self: flex-start;
      user-select: none;
      display: block;
      margin: 0;
      transition: box-shadow 0.3s;
    }
    .book-img:hover {
      box-shadow: 0 8px 32px rgba(251,191,36,0.18);
    }
    section.book-info {
      flex: 1 1 0;
      min-width: 0;
      max-width: 100%;
      display: flex;
      flex-direction: column;
      gap: 18px;
      box-sizing: border-box;
    }
    section.book-info h1 {
      margin: 0;
      font-size: 2.2rem;
      font-weight: 700;
      line-height: 1.15;
      user-select: text;
      color: black;
      /* color: var(--accent-color); */
      letter-spacing: 0.5px;
    }
    section.book-info .author {
      font-weight: 600;
      color: var(--text-secondary);
      font-size: 1.15rem;
      user-select: text;
      margin-bottom: 4px;
    }
    section.book-info .category {
      background: var(--accent-color);
      color: #222222;
      border-radius: 20px;
      padding: 5px 18px;
      font-size: 1.05rem;
      font-weight: 500;
      user-select: none;
      width: fit-content;
      margin: 0 0 8px 0;
      box-shadow: 0 2px 8px rgba(251,191,36,0.08);
    }
    section.book-info .description-label {
      font-weight: 600;
      font-size: 1.1rem;
      margin-top: 10px;
      user-select: none;
      color: var(--text-primary);
    }
    section.book-info .description-text {
      color: var(--text-secondary);
      font-size: 1.08rem;
      white-space: pre-wrap;
      user-select: text;
      margin-top: 0.25rem;
      background: #f9f7f3;
      border-radius: 10px;
      padding: 14px 16px;
      transition: background 0.2s;
      cursor: pointer;
    }
    section.book-info .description-text:hover {
      background: #fffbe8;
    }
    section.book-info .actions {
      margin-top: 18px;
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }
    section.book-info .actions a.button {
      display: inline-block;
      padding: 13px 32px;
      border-radius: var(--border-radius);
      text-decoration: none;
      font-weight: 600;
      font-size: 1.1rem;
      box-shadow: 0 2px 8px rgba(251,191,36,0.1);
      transition: background-color var(--transition), transform var(--transition);
      user-select: none;
      color: #222;
      cursor: pointer;
      background: var(--accent-color);
      border: none;
    }
    section.book-info .actions a.read-btn:hover,
    section.book-info .actions a.read-btn:focus {
      background: #ffe08a;
      outline: none;
      transform: scale(1.05);
      color: #222;
    }
    button.read-more-btn {
      background: none;
      border: none;
      color: var(--accent-color);
      cursor: pointer;
      font-weight: 600;
      padding-left: 8px;
      font-size: 1rem;
      user-select: none;
      transition: color var(--transition);
      align-self: start;
    }
    button.read-more-btn:hover,
    button.read-more-btn:focus {
      color: #f59e0b;
      outline: none;
      text-decoration: underline;
    }
    .loading-message, .error-message {
      font-size: 1.25rem;
      color: var(--text-secondary);
      text-align: center;
      padding: 2rem 0;
      user-select: none;
    }
    .error-message {
      color: #cc0000;
      font-weight: 600;
    }
    #readBtn {
      transition: all 0.3s ease;
    }
    /* Recommended books */
    section.recommended-section {
      margin-top: 0;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
      color: var(--text-primary);
      width: 100%;
      background: #fff;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-light);
      padding: 32px 24px 24px 24px;
      margin-bottom: 40px;
      animation: fadeIn 0.7s;
      box-sizing: border-box; /* Add this line to match the main container width */
    }
    section.recommended-section h2 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 24px;
      user-select: none;
      margin-left: 10px;
      color: var(--accent-color);
    }
    div.recommended-list {
      display: flex;
      gap: 20px;
      flex-wrap: nowrap;
      overflow-x: auto;
      padding-bottom: 10px;
      scrollbar-width: thin;
      scrollbar-color: #fbbf24 #eee;
    }
    a.recommended-item {
      background: #faf8f2;
      border-radius: 12px;
      box-shadow: 0 4px 16px rgba(251,191,36,0.15);
      padding: 14px 12px;
      width: 140px;
      text-align: center;
      color: var(--text-primary);
      text-decoration: none;
      font-weight: 600;
      font-size: 1rem;
      user-select: none;
      display: flex;
      flex-direction: column;
      align-items: center;
      transition: box-shadow 0.3s ease, background-color 0.3s ease;
      cursor: pointer;
      flex: 0 0 auto;
    }
    a.recommended-item:hover,
    a.recommended-item:focus {
      background-color: var(--accent-color);
      box-shadow: 0 8px 28px rgba(251,191,36,0.3);
      outline: none;
      color: #222;
    }
    a.recommended-item img {
      width: 80px;
      height: auto;
      border-radius: 9px;
      margin-bottom: 10px;
      background: #fff;
      user-select: none;
      pointer-events: none;
    }
    @media (max-width: 1200px) {
      main.container {
        max-width: 98vw;
      }
      section.recommended-section,
      main.container {
        max-width: 98vw;
      }
    }
    @media (max-width: 1000px) {
      main.container {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0 !important;
        margin-top: 15px !important;
        padding: 24px 8px !important;
        max-width: 100vw;
        position: relative;
        padding-top: 60px !important;
      }
      #bookDetailArea {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0 !important;
        width: 100% !important;
        min-width: 0 !important;
        margin: 0 !important;
        display: flex !important;
      }
      .book-img {
        margin: 0 auto 22px auto !important;
        display: block !important;
        align-self: center !important;
        width: 60vw !important;
        max-width: 240px !important;
        min-width: 120px !important;
        height: auto !important;
      }
      section.book-info {
        align-items: center !important;
        text-align: center !important;
        width: 100% !important;
        margin-top: 0 !important;
        padding: 0 !important;
        box-sizing: border-box;
      }
    }
    .go-back-btn {
  position: absolute;
  top: 10px; /* was 20px, now 10px to move it more upwards */
  left: 20px;
  background-color: #fbbf24;
  color: #111827;
  padding: 10px 18px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  cursor: pointer;
  z-index: 10;
  transition: background-color 0.3s, transform 0.2s;
}

.go-back-btn:hover {
  background-color: #ffe08a;
  transform: translateY(-1px);
}