body {
  background-color: #f6f6f6;
  color: #333;
  font-family: Georgia, serif;
  margin: 0;
}

container {
  max-width: 1000px;
  margin: auto;
  background-color: #fff;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

header {
  display: flex;
  align-items: center;
  padding: 1rem;
  background-color: #d8e2dc;
}

.navigation {
  text-align: center;
  margin-top: 1rem;
}

.navigation a {
  margin: 0 10px;
  text-decoration: none;
  color: #0057a0;
  font-weight: bold;
}

.navigation a:hover {
  text-decoration: underline;
}

header {
  display: flex;
  align-items: center;
  padding: 1rem;
  background-color: #d8e2dc;
}
header img {
  margin-right: 1rem;
}
header h1 {
  font-size: 1.5rem;
  margin: 0;
}

h2 {
  text-align: center;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0.5rem;
  background-color: #b5c0ba;
}

nav li {
  margin-right: 1rem;
}

nav a {
  text-decoration: none;
  color: #000;
}

main {
  padding: 1rem;
}

footer {
  padding: 1rem;
  background-color: #d8e2dc;
  font-size: 0.9rem;
  text-align: center;
}

.thumb-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 1rem;
  gap: 10px;
}

.thumb-grid img {
  width: 160px;
  height: auto;
  border: 1px solid #ccc;
  transition: transform 0.2s ease-in-out;
}

.thumb-grid img:hover {
  transform: scale(1.05);
  border-color: #666;
}

.page-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

.page-display img {
  max-width: 100%;
  border: 1px solid #ccc;
  margin-bottom: 1rem;
}

.navigation {
  text-align: center;
  margin-top: 1rem;
}

.navigation a {
  margin: 0 10px;
  text-decoration: none;
  color: #0057a0;
  font-weight: bold;
}

.navigation a:hover {
  text-decoration: underline;
}

.page-display img {
  max-width: 100%;
  margin: 1rem 0;
  padding: 8px;
  background-color: #fff;
  border: 1px solid #ccc;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

table.frame-index {
  width: 100%;
  margin: 1rem 0;
  border-collapse: collapse;
  text-align: center;
}

table.frame-index td {
  padding: 0.5rem;
  font-weight: bold;
}

.thumb-table {
  margin: 0 auto;
  border-collapse: collapse;
  max-width: 960px; /* Adjust to fit your grid */
  width: 100%;
}

.thumb-table td {
  padding: 0px;
  text-align: center;
  vertical-align: top;
}

.nav-table {
  width: 100%;
  max-width: 960px;
  table-layout: fixed;
  margin: 1rem auto;
  font-weight: bold;
}

.nav-table td {
  width: 33.33%;
  text-align: center;
  padding: 0.5rem;
}

.index-title {
  text-align: center;
  margin-top: 1rem;
  font-size: 1.5rem;
}

table.frame-index {
  width: 100%;
  max-width: 960px;
  margin: 1rem auto;
  border-collapse: collapse;
  text-align: center;
  table-layout: fixed;
}

table.frame-index td {
  padding: 0.5rem;
  font-weight: bold;
  width: 25%; /* 4 columns */
}

.frame-index a:hover {
  text-decoration: underline;
  color: #3366cc;
}

.full-page-image {
  text-align: center;
  margin: 1rem 0;
}

.full-page-image img {
  max-width: 100%;
  height: auto;
  padding: 8px;
  background-color: #fff;
  border: 1px solid #ccc;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.stamp-overlay {
  position: absolute;
  cursor: pointer;
}

.stamp-overlay .preview {
  display: none !important;
  position: absolute;
  top: 100%;
  left: 0;
  max-width: 250px;
  border: 1px solid #ccc;
  background: #fff;
  z-index: 100;
  box-shadow: 0 0 6px rgba(0,0,0,0.25);
}

.stamp-overlay:hover .preview {
  display: block;
}