/* Typography and Reset */
body {
  font-family: "EB Garamond", serif;
  font-size: 18px;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #222;
  margin: 0;
  padding: 0;
  word-wrap: break-word;
  overflow-x: hidden;
}

/* Layout Container */
main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Header and Nav */
header {
  background-color: #003366;
  color: white;
  padding: 1.5rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
}

nav {
  margin-top: 0.5rem;
  text-align: center;
  flex-wrap: wrap;
}

nav a {
  color: white;
  margin: 0 0.5em;
  text-decoration: none;
  font-weight: 500;
  display: inline-block;
  padding: 0.25em 0;
}

/* Footer */
footer {
  background-color: #eee;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  margin-top: 3rem;
}

/* Headings */
h1 {
  text-align: center;
}

h2,
h3 {
  color: #003366;
  margin-top: 2rem;
  font-size: 1.4rem;
}

/* Lists */
ul {
  padding-left: 1.25rem;
  margin: 1rem 0;
}

ul li {
  margin-bottom: 0.5rem;
}

/* Table Styling */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  overflow-x: auto;
  display: block;
}

table th,
table td {
  border: 1px solid #aaa;
  padding: 0.6rem;
  text-align: center;
  font-size: 1rem;
  background-color: #fff;
}

table th {
  background-color: #dde8f0;
  font-weight: bold;
}

/* Flashcards */
.flashcard {
  margin: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: left;
}

.card {
  width: 140px;
  height: 80px;
  perspective: 1000px;
  position: relative;
  cursor: pointer;
  flex: 0 1 auto;
}

.card .front,
.card .back {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  border: 1px solid #ccc;
  box-shadow: 1px 1px 6px rgba(0, 0, 0, 0.1);
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  backface-visibility: hidden;
  transition: transform 0.4s ease;
  border-radius: 6px;
  text-align: center;
}

.card .back {
  transform: rotateY(180deg);
}

.card.flipped .front {
  transform: rotateY(180deg);
}

.card.flipped .back {
  transform: rotateY(360deg);
}

/* Image Grid */
.image-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: flex-start;
  padding-left: 0;
  margin-left: 0;
}

.image-row img {
  width: 100%;
  max-width: 180px;
  height: auto;
  flex: 1 1 calc(33.333% - 1rem);
  box-sizing: border-box;
  border-radius: 6px;
}

@media (max-width: 768px) {
  body {
    font-size: 18px; /* Slight increase */
    padding: 0;
    margin: 0;
  }

  main {
    padding: 0 0.5rem; /* Tighter padding */
    width: 100%;
  }

  header h1 {
    font-size: 1.8rem;
  }

  h2,
  h3 {
    font-size: 1.4rem;
  }

  .card {
    width: 100%;
    height: auto;
    min-height: 100px;
  }

  .card .front,
  .card .back {
    font-size: 1rem;
  }

  table th,
  table td {
    font-size: 1rem;
    padding: 0.6rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 17px;
  }

  main {
    padding: 0 0.5rem;
    width: 100%;
  }

  nav a {
    display: block;
    margin: 0.3em 0;
    font-size: 1rem;
  }

  header h1 {
    font-size: 1.6rem;
  }

  h2,
  h3 {
    font-size: 1.3rem;
  }

  .card {
    width: 100%;
    height: auto;
    min-height: 110px;
  }

  .card .front,
  .card .back {
    font-size: 1rem;
    padding: 0.75rem;
  }

  table th,
  table td {
    font-size: 1rem;
    padding: 0.6rem;
  }

  .image-row img {
    flex: 1 1 100%;
    max-width: 100%;
  }
}