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

body {
  font-family: "Barlow Condensed", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--th-bg);
  min-height: 100vh;
  color: var(--th-text);
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--th-text);
}

.subtitle {
  color: var(--th-text);
  margin-bottom: 30px;
  opacity: 0.85;
}

.upload-section {
  margin-bottom: 30px;
}

.drop-zone {
  border: 3px dashed var(--th-border-hi);
  border-radius: 12px;
  padding: 60px 20px;
  background: var(--th-panel);
  transition: all 0.3s ease;
  cursor: pointer;
}

.drop-zone:hover,
.drop-zone.dragover {
  background: var(--th-accent-dim);
  border-color: var(--th-accent);
  transform: scale(1.02);
}

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.drop-content svg {
  color: var(--th-text);
  opacity: 0.8;
}

.drop-content p {
  font-size: 1.2rem;
  color: var(--th-text);
}

.drop-content span {
  color: var(--th-text);
  opacity: 0.7;
}

.upload-btn {
  background: var(--th-accent);
  color: var(--th-accent-ink);
  padding: 12px 30px;
  border-radius: 8px;
  cursor: pointer;
  font: 800 16px 'Barlow Condensed', sans-serif;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--th-accent-dim);
  background: var(--th-accent-hover);
}

.preview-section,
.download-section {
  background: var(--th-panel);
  border: 1px solid var(--th-border);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 20px;
}

.preview-section h2,
.download-section h2 {
  margin-bottom: 20px;
  color: var(--th-text);
}

.image-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
  max-height: 300px;
  overflow-y: auto;
  padding: 10px;
}

.image-item {
  position: relative;
  aspect-ratio: 1;
  background: var(--th-mid);
  border: 1px solid var(--th-border);
  border-radius: 10px;
  overflow: hidden;
}

.image-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 5px;
}

.image-item .number {
  position: absolute;
  top: 5px;
  left: 5px;
  background: var(--th-accent);
  color: var(--th-accent-ink);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
}

.process-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 25px;
  border: none;
  border-radius: 8px;
  font: 800 16px 'Barlow Condensed', sans-serif;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--th-accent);
  color: var(--th-accent-ink);
}
.btn-primary:hover:not(:disabled) {
  background: var(--th-accent-hover);
}

.btn-secondary {
  background: var(--th-mid);
  border: 1px solid var(--th-border-hi);
  color: var(--th-text);
}

.btn-success {
  background: var(--th-ok);
  color: var(--th-accent-ink);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--th-border-hi);
  color: var(--th-text);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.progress-area {
  margin-top: 20px;
}

.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--th-mid);
  border: 1px solid var(--th-border);
  border-radius: 5px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--th-accent);
  width: 0%;
  transition: width 0.3s ease;
}

#progressText {
  margin-top: 10px;
  color: var(--th-text);
}

.download-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.image-item .new-name {
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: var(--th-text);
  font-size: 9px;
  padding: 2px 5px;
  border-radius: 3px;
  white-space: nowrap;
  max-width: 90%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-list::-webkit-scrollbar {
  width: 8px;
}

.image-list::-webkit-scrollbar-track {
  background: var(--th-bg);
  border-radius: 4px;
}

.image-list::-webkit-scrollbar-thumb {
  background: var(--th-border-hi);
  border-radius: 4px;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.8rem;
  }

  .process-buttons,
  .download-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}