:root {
  --color-bg: #FFFFFF;
  --color-primary: #332c28; /* rich brown */
  --color-accent: rgb(167, 212, 250);  /* soft fall orange */
  --color-text: #3E2F28;
}

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

.container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 0 1rem; /* for small screen side breathing room */
}

body {
  font-family: Arial, sans-serif;
  background-color: #778079;
  background-image: url(images/bg.jpg);
  color: var(--color-text);
  line-height: 1.6;
  padding: 20px;
  margin: 0;
}

header {
  background: var(--color-primary);
  color: white;
  padding: 1rem;
  text-align: center;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  justify-content: center; /* centers the links horizontally */
  color: white;
  text-transform: uppercase;
}

header nav a {
  color: white;
  text-decoration: none;
  margin-right: 1rem;
}

header nav a:hover {
  background-color: var(--color-accent);
  color: rgb(20, 20, 20);
  padding: 0.25rem 0.5rem;
  border-radius: 2px;
  transition: background-color 0.2s ease;
}

.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 50vh; /* or 100vh for full screen */
  text-align: left;
  background: rgb(205, 234, 247);
  color: rgb(31, 30, 30);
  padding: 2rem;
}

main {
  padding: 1rem 2rem;
  background-color: var(--color-bg);
}

.book {
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg);
  margin-bottom: 1.5rem;
  padding: 20px;
  text-align: left;
}

.book-cover {
  width: 180px;
  max-width: 100%;
  height: auto;
  margin: 0.5rem 0;
  border: 2px solid var(--color-accent);
  border-radius: 4px;
}

.book-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.book-buttons .btn {
  padding: 0.6rem 1.2rem;
  text-decoration: none;
  color: white;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.3s ease;
  text-align: center;
  min-width: 120px;
}

/* Button Brand Colors */
.btn.amazon {
  background-color: #290cca;
}

.btn.amazon:hover {
  background-color: #e68a00;
}

.btn.bn {
  background-color: #0b8024;
}

.btn.bn:hover {
  background-color: #1e4026;
}

.btn.apple {
  background-color: #07775b;
}

.btn.apple:hover {
  background-color: #000000;
}

footer {
  text-align: center;
  color: whitesmoke;
  padding: 1rem;
  background: #141210;
  margin-top: 2rem;
}

/* --- Responsive Breakpoints --- */
@media (max-width: 768px) {
  header,
  main,
  footer {
    padding: 1rem;
  }

  nav {
    flex-direction: column;
    align-items: center;
  }

   .book-buttons  {
    flex-direction: column;
    align-items: center;
  }

  header h1 {
    font-size: 1.5rem;
  }

  .hero h2 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 1.25rem;
  }

  .hero h2 {
    font-size: 1rem;
  }

  nav a {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }

  main {
    padding: 1rem;
  }

  .book-cover {
    width: 100%;
  }
}