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

:root {
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #999999;
  --gray-600: #666666;
  --gray-900: #1a1a1a;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "Fira Code", monospace;
}

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--gray-900);
  -webkit-font-smoothing: antialiased;
}

.header {
  padding: 32px 0 28px;
  border-bottom: 1px solid var(--gray-200);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand h1 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 3px;
}

.brand p {
  font-size: 13px;
  color: var(--gray-400);
  margin-top: 4px;
}

.search {
  margin-top: 20px;
}

.search input {
  width: 100%;
  max-width: 400px;
  padding: 10px 0;
  font-size: 14px;
  font-family: var(--font);
  border: none;
  border-bottom: 1px solid var(--gray-200);
  background: transparent;
  outline: none;
  transition: border-color 0.2s;
}

.search input:focus {
  border-color: var(--gray-900);
}

.search input::placeholder {
  color: var(--gray-400);
}

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.browse {
  display: flex;
  gap: 56px;
  padding: 40px 0;
  border-bottom: 1px solid var(--gray-200);
}

.browse-group h2 {
  font-size: 11px;
  font-weight: 500;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 5px 12px;
  font-size: 12px;
  color: var(--gray-600);
  background: var(--gray-100);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tag-count {
  font-size: 10px;
  color: var(--gray-400);
  font-family: var(--mono);
}

.tag.active .tag-count {
  color: rgba(255,255,255,0.6);
}

.tag:hover {
  color: var(--gray-900);
}

.tag.active {
  color: var(--white);
  background: var(--gray-900);
}

.gallery {
  padding: 40px 0 80px;
}

.gallery-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}

.gallery-header h2 {
  font-size: 13px;
  font-weight: 500;
}

.gallery-header span {
  font-size: 12px;
  color: var(--gray-400);
  font-family: var(--mono);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  cursor: pointer;
}

.card-thumb {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 66.67%;
  background: var(--gray-100);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 12px;
}

.card-thumb img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-thumb-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
}

.card-thumb-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  font-size: 11px;
  color: var(--gray-400);
  letter-spacing: 0.5px;
}

.card-info {
  padding: 0 2px;
}

.card-title {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  font-size: 12px;
  color: var(--gray-400);
  margin-bottom: 4px;
}

.card-id {
  font-size: 11px;
  color: var(--gray-400);
  font-family: var(--mono);
  margin-bottom: 8px;
}

.card-version {
  font-size: 11px;
  color: var(--gray-400);
  margin-bottom: 12px;
}

.card-actions {
  display: flex;
  gap: 8px;
  opacity: 0;
  transition: opacity 0.15s;
}

.card:hover .card-actions {
  opacity: 1;
}

.btn {
  flex: 1;
  padding: 8px 12px;
  font-size: 12px;
  font-family: var(--font);
  text-align: center;
  text-decoration: none;
  border-radius: 2px;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--gray-900);
  color: var(--white);
}

.btn-primary:hover {
  background: #333;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-600);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

.btn-secondary.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.empty {
  display: none;
  text-align: center;
  padding: 80px 0;
  color: var(--gray-400);
  font-size: 13px;
}

@media (max-width: 1024px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .header {
    padding: 24px 0 20px;
  }
  
  .browse {
    flex-direction: column;
    gap: 24px;
  }
  
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .card-actions {
    opacity: 1;
  }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .card-title {
    font-size: 13px;
  }
  
  .card-meta,
  .card-id,
  .card-version {
    font-size: 11px;
  }
  
  .btn {
    padding: 6px 8px;
    font-size: 11px;
  }
}