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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 30px 0;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
}

main {
    margin-bottom: 30px;
}

section {
    background-color: #fff;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h2 {
    color: #3498db;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

h3 {
    color: #3498db;
    margin: 10px 0;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.grade-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.grade-btn {
    padding: 10px 15px;
    background-color: #ecf0f1;
    border: 1px solid #bdc3c7;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
}

.grade-btn:hover {
    background-color: #bdc3c7;
}

.grade-btn.selected {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
}

.upload-area {
    border: 2px dashed #3498db;
    border-radius: 5px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.upload-area:hover {
    background-color: #e3f2fd;
}

.upload-area input[type="file"] {
    display: none;
}

.upload-controls {
    text-align: center;
    margin: 20px 0;
}

.upload-controls button {
    padding: 10px 20px;
    margin: 0 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

#uploadBtn {
    background-color: #3498db;
    color: white;
}

#uploadBtn:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

#pauseBtn, #resumeBtn {
    background-color: #f39c12;
    color: white;
}

#clearBtn {
    background-color: #e74c3c;
    color: white;
}

.progress-container {
    width: 100%;
    height: 20px;
    background-color: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
    margin: 20px 0;
    position: relative;
}

.progress-bar {
    height: 100%;
    background-color: #3498db;
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

/* From Uiverse.io by Galahhad */
/* checkbox settings 👇 */

.ui-checkbox {
  --primary-color: #1677ff;
  --secondary-color: #fff;
  --primary-hover-color: #4096ff;
  /* checkbox */
  --checkbox-diameter: 20px;
  --checkbox-border-radius: 5px;
  --checkbox-border-color: #d9d9d9;
  --checkbox-border-width: 1px;
  --checkbox-border-style: solid;
  /* checkmark */
  --checkmark-size: 1.2;
}

.ui-checkbox, 
.ui-checkbox *, 
.ui-checkbox *::before, 
.ui-checkbox *::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

.ui-checkbox {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: var(--checkbox-diameter);
  height: var(--checkbox-diameter);
  border-radius: var(--checkbox-border-radius);
  background: var(--secondary-color);
  border: var(--checkbox-border-width) var(--checkbox-border-style) var(--checkbox-border-color);
  -webkit-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
  cursor: pointer;
  position: relative;
}

.ui-checkbox::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  -webkit-box-shadow: 0 0 0 calc(var(--checkbox-diameter) / 2.5) var(--primary-color);
  box-shadow: 0 0 0 calc(var(--checkbox-diameter) / 2.5) var(--primary-color);
  border-radius: inherit;
  opacity: 0;
  -webkit-transition: all 0.5s cubic-bezier(0.12, 0.4, 0.29, 1.46);
  -o-transition: all 0.5s cubic-bezier(0.12, 0.4, 0.29, 1.46);
  transition: all 0.5s cubic-bezier(0.12, 0.4, 0.29, 1.46);
}

.ui-checkbox::before {
  top: 40%;
  left: 50%;
  content: "";
  position: absolute;
  width: 4px;
  height: 7px;
  border-right: 2px solid var(--secondary-color);
  border-bottom: 2px solid var(--secondary-color);
  -webkit-transform: translate(-50%, -50%) rotate(45deg) scale(0);
  -ms-transform: translate(-50%, -50%) rotate(45deg) scale(0);
  transform: translate(-50%, -50%) rotate(45deg) scale(0);
  opacity: 0;
  -webkit-transition: all 0.1s cubic-bezier(0.71, -0.46, 0.88, 0.6),opacity 0.1s;
  -o-transition: all 0.1s cubic-bezier(0.71, -0.46, 0.88, 0.6),opacity 0.1s;
  transition: all 0.1s cubic-bezier(0.71, -0.46, 0.88, 0.6),opacity 0.1s;
}

/* actions */

.ui-checkbox:hover {
  border-color: var(--primary-color);
}

.ui-checkbox:checked {
  background: var(--primary-color);
  border-color: transparent;
}

.ui-checkbox:checked::before {
  opacity: 1;
  -webkit-transform: translate(-50%, -50%) rotate(45deg) scale(var(--checkmark-size));
  -ms-transform: translate(-50%, -50%) rotate(45deg) scale(var(--checkmark-size));
  transform: translate(-50%, -50%) rotate(45deg) scale(var(--checkmark-size));
  -webkit-transition: all 0.2s cubic-bezier(0.12, 0.4, 0.29, 1.46) 0.1s;
  -o-transition: all 0.2s cubic-bezier(0.12, 0.4, 0.29, 1.46) 0.1s;
  transition: all 0.2s cubic-bezier(0.12, 0.4, 0.29, 1.46) 0.1s;
}

.ui-checkbox:active:not(:checked)::after {
  -webkit-transition: none;
  -o-transition: none;
  -webkit-box-shadow: none;
  box-shadow: none;
  transition: none;
  opacity: 1;
}

/* 照片网格布局 */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  padding: 20px;
}

.photo-grid-content {
  display: contents;
}

/* 照片项目 */
.photo-item {
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  background: white;
  display: flex;
  flex-direction: column;
}

.photo-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.photo-item video,
.photo-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.photo-info {
  padding: 15px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.photo-name {
  font-weight: bold;
  margin: 0 0 10px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.photo-author {
  color: #666;
  margin: 5px 0;
  font-size: 0.9em;
}

.photo-size, .photo-date {
  color: #888;
  font-size: 0.8em;
  margin: 3px 0;
}

/* 照片操作按钮 */
.photo-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  flex-grow: 1;
  align-items: flex-end;
}

.download-btn, .rename-btn {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9em;
  transition: background-color 0.3s ease;
}

.download-btn {
  background-color: #28a745;
  color: white;
}

.download-btn:hover {
  background-color: #218838;
}

.rename-btn {
  background-color: #ffc107;
  color: #212529;
}

.rename-btn:hover {
  background-color: #e0a800;
}

/* 照片选择框 */
.photo-select {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 4px;
  padding: 2px;
}

/* 批量操作区域 */
.batch-operations {
  grid-column: 1 / -1;
  background: #f8f9fa;
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.batch-operations button {
  padding: 8px 16px;
  border: 1px solid #ddd;
  background: white;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.batch-operations button:hover:not(:disabled) {
  background: #007bff;
  color: white;
  border-color: #007bff;
}

.batch-operations button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.batch-operations::after {
  content: "";
  flex: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    padding: 15px;
  }
  
  .batch-operations {
    flex-direction: column;
    align-items: stretch;
  }
  
  .batch-operations button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }
}

.thumbnail-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.thumbnail-item {
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow: hidden;
    background-color: #f8f9fa;
}

.thumbnail-img {
    width: 100%;
    height: 100px;
    object-fit: cover;
}

.video-thumbnail, .file-thumbnail {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    background-color: #e9ecef;
}

.video-icon, .file-icon {
    font-size: 24px;
}

.thumbnail-info {
    padding: 8px;
}

.file-name {
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 5px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    font-size: 11px;
    color: #666;
}

.file-info {
    padding: 10px;
    background-color: #e3f2fd;
    border-radius: 5px;
    margin: 10px 0;
    text-align: center;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}