button {
  background: linear-gradient(135deg, #0F2BC9 0%, #667eea 100%);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}
button:hover {
  transform: translateY(1px);
}


#download-all {
  display: block;
  margin: 1rem auto;
}


.converted-table-container {
  display: none;
  margin-top: 1.5rem;
}


.preview-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.preview-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 0.75rem;
  font-family: "Roboto Slab", serif;
  color: #374151;
}
.preview-item img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid #d1d5db;
  margin-bottom: 0.25rem;
}


.format-selection {
  margin: 1rem 0;
  font-size: 1rem;
  font-family: "Roboto Slab", serif;
  color: #111827;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.format-selection label {
  font-weight: 500;
  font-family: "Roboto Slab", serif;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.format-selection select {
  appearance: none; 
  -webkit-appearance: none;
  -moz-appearance: none;
  padding: 0.5rem 1.3rem;
  border: 2px dashed #000000;
  border-radius: 6px;
  background-color: #ffffff;
  font-size: 1rem;
  cursor: pointer;
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  min-width: 80px;
}

.format-selection select:focus {
  outline: none;
  border-color: #4f46e5;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.format-selection select::after {
  content: "▾";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: #4b5563;
}

.format-selection select option {
  padding: 0.35rem 0.5rem;
  font-size: 0.95rem;
  color: #111827;
}

.format-selection select option:first-child {
  color: #9ca3af; 
}




/***** Media Query *****/
/***** Standard tablets & landscape phones (≤768px) ******/
@media (max-width: 768px) {
 .upload-area {
  padding: 1.5rem;
  margin: 2rem auto;
  max-width: 650px;
  width: 100%;
}

.upload-icon {
  font-size: 3.5rem;
}

.upload-area .upload-text {
  font-size: 1.3rem;
}

.format-selection {
  margin: 1rem 0;
  font-size: 0.9rem;
  gap: 0.5rem;
}

.format-selection label {
  font-size: 1.5rem;
  gap: 0.5rem;
}
}

/***** Large smartphones & phablets (≤617px) ******/
@media (max-width: 617px) {
 .upload-area {
  padding: 1.3rem;
  margin: 2rem auto;
  max-width: 550px;
  width: 100%;
}

.upload-icon {
  font-size: 3rem;
}

.upload-area .upload-text {
  font-size: 1.3rem;
}

th, td {
  padding: 0.8rem 1rem;
  font-size: 0.9rem;
}

#download-all {
  margin: 1rem auto 0 auto; 
  padding: 0.9rem 1.5rem;
  font-size: 0.9rem;
}

.format-selection label {
  font-size: 1.5rem;
  gap: 0.5rem;
}

.format-selection select {
  padding: 0.5rem 1.3rem;
  font-size: 0.9rem;
  min-width: 80px;
}
}

/***** Small smartphones (≤450px) ******/
@media (max-width: 450px) {
 .upload-area {
  padding: 1rem;
  margin: 2rem auto;
  max-width: 450px;
  width: 100%;
}

.upload-icon {
  font-size: 2.5rem;
}

.upload-area .upload-text {
  font-size: 1rem;
}

.upload-area .upload-info {
  font-size: 0.8rem;
}

th, td {
  padding: 0.7rem 1rem;
  font-size: 0.8rem;
}

#download-all {
  margin: 1rem auto 0 auto; 
  padding: 0.8rem 1.5rem;
  font-size: 0.8rem;
}

.converted-table-container table,
.converted-table-container thead,
.converted-table-container tbody,
.converted-table-container th,
.converted-table-container td,
.converted-table-container tr,
.converted-table-container{
  display: block;
  width: 100%;
  max-width: 410px;
}

.converted-table-container thead {
  display: none; /* hide header */
}

.converted-table-container tr {
  margin-bottom: 1.2rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  padding: 0.5rem;
  background: #f9f9f9;
}

.converted-table-container td {
  display: flex;
  flex-direction: column;
  align-items: stretch;  
  text-align: center;
  padding: 0.5rem 0;
  border: none;
}

.converted-table-container td:last-child {
  border-bottom: none;
}

.converted-table-container td::before {
  content: attr(data-label);
  display: block;
  width: 100%;            
  font-weight: 600;
  color: #fff;
  background-color: #0F2BC9;
  padding: 0.5rem;         
  margin-bottom: 0.3rem;
  box-sizing: border-box;
}
}

/***** Extra small phones & older devices (≤365px) ******/
@media (max-width: 365px) {
 .upload-area {
  padding: 0.8rem;
  margin: 0.7rem auto;
  max-width: 320px;
  width: 100%;
}

.upload-icon {
  font-size: 1.8rem;
}

.upload-area .upload-text {
  font-size: 0.8rem;
}

.upload-area .upload-info {
  font-size: 0.6rem;
}

th, td {
  padding: 0.5rem 1rem;
  font-size: 0.7rem;
}

.format-selection label {
  font-size: 1.2rem;
  gap: 0.5rem;
}

.format-selection select {
  padding: 0.3rem 1.3rem;
  font-size: 0.7rem;
  min-width: 80px;
}

#download-all {
  margin: 1rem auto 0 auto; 
  padding: 0.8rem 1.5rem;
  font-size: 0.8rem;
}

.converted-table-container table,
.converted-table-container thead,
.converted-table-container tbody,
.converted-table-container th,
.converted-table-container td,
.converted-table-container tr,
.converted-table-container{
  display: block;
  width: 100%;
  max-width: 370px;
}

.converted-table-container thead {
  display: none; /* hide header */
}

.converted-table-container tr {
  margin-bottom: 1.2rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  padding: 0.5rem;
  background: #f9f9f9;
}

.converted-table-container td {
  display: flex;
  flex-direction: column;
  align-items: stretch;  
  text-align: center;
  padding: 0.5rem 0;
  border: none;
}

.converted-table-container td:last-child {
  border-bottom: none;
}

.converted-table-container td::before {
  content: attr(data-label);
  display: block;
  width: 100%;            
  font-weight: 600;
  color: #fff;
  background-color: #0F2BC9;
  padding: 0.5rem;         
  margin-bottom: 0.3rem;
  box-sizing: border-box;
}
}