/* AI Image Upscaler & Super-Resolution Enhancer CSS (Prefix: aiiu-) */

.aiiu-body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1e293b;
  background-color: #f8fafc;
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

.aiiu-header {
  background-color: #0f172a;
  border-bottom: 1px solid #1e293b;
  padding: 0.75rem 1.5rem;
}

.aiiu-nav-container {
  max-width: 1150px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.aiiu-logo-link {
  font-size: 1.25rem;
  font-weight: 700;
  color: #38bdf8;
  text-decoration: none;
}

.aiiu-logo-link:hover {
  color: #7dd3fc;
}

.aiiu-nav-badge {
  background-color: #1e293b;
  color: #38bdf8;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.aiiu-main {
  max-width: 1150px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.aiiu-breadcrumbs {
  margin-bottom: 1rem;
}

.aiiu-bc-list {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.875rem;
  color: #64748b;
}

.aiiu-bc-item {
  display: inline;
}

.aiiu-bc-link {
  color: #0284c7;
  text-decoration: none;
}

.aiiu-bc-link:hover {
  text-decoration: underline;
}

.aiiu-bc-separator {
  margin: 0 0.5rem;
  color: #94a3b8;
}

.aiiu-bc-current {
  color: #334155;
  font-weight: 500;
}

/* Privacy Alert */
.aiiu-privacy-banner {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-left: 4px solid #16a34a;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
}

.aiiu-privacy-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.aiiu-privacy-text {
  font-size: 0.85rem;
  color: #15803d;
  line-height: 1.4;
}

/* Hero */
.aiiu-hero {
  margin-bottom: 1.5rem;
}

.aiiu-title {
  font-size: 2rem;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 0.5rem 0;
  letter-spacing: -0.02em;
}

.aiiu-subtitle {
  font-size: 1.05rem;
  color: #475569;
  margin: 0;
  max-width: 800px;
}

/* Samples Bar */
.aiiu-samples-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  background-color: #e2e8f0;
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.aiiu-samples-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
}

.aiiu-samples-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.aiiu-sample-btn {
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  color: #1e293b;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.aiiu-sample-btn:hover {
  background-color: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

.aiiu-sample-active {
  background-color: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

/* Workspace Grid */
.aiiu-workspace {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (max-width: 960px) {
  .aiiu-workspace {
    grid-template-columns: 1fr;
  }
}

.aiiu-viewer-column {
  display: flex;
  flex-direction: column;
}

/* Cards */
.aiiu-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.aiiu-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #f1f5f9;
}

.aiiu-canvas-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
}

.aiiu-viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.aiiu-tag-group {
  display: flex;
  gap: 0.5rem;
}

.aiiu-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.aiiu-tag-orig {
  background-color: #f1f5f9;
  color: #475569;
}

.aiiu-tag-upscaled {
  background-color: #dcfce7;
  color: #15803d;
}

.aiiu-slider-hint {
  font-size: 0.8rem;
  color: #64748b;
}

/* Comparison Box */
.aiiu-comparison-box {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #0f172a;
  border-radius: 6px;
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
  border: 1px solid #cbd5e1;
}

.aiiu-canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.aiiu-canvas-upscaled {
  position: absolute;
  top: 0;
  left: 0;
}

.aiiu-clipped-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  overflow: hidden;
  z-index: 2;
  background-color: #0f172a;
}

.aiiu-canvas-orig {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  max-width: none;
}

/* Divider Handle */
.aiiu-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 4px;
  transform: translateX(-50%);
  z-index: 5;
  pointer-events: none;
}

.aiiu-divider-line {
  width: 2px;
  height: 100%;
  background-color: #ffffff;
  box-shadow: 0 0 6px rgba(0,0,0,0.6);
  margin: 0 auto;
}

.aiiu-divider-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 32px;
  height: 32px;
  background-color: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #0f172a;
}

/* Status Bar */
.aiiu-status-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
}

.aiiu-status-metric {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
}

.aiiu-status-label {
  color: #64748b;
  font-weight: 600;
}

.aiiu-status-val {
  color: #0f172a;
  font-weight: 700;
  font-family: ui-monospace, monospace;
}

.aiiu-text-green {
  color: #16a34a;
}

/* Controls Column */
.aiiu-controls-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Dropzone */
.aiiu-dropzone {
  border: 2px dashed #cbd5e1;
  border-radius: 6px;
  padding: 1.25rem;
  text-align: center;
  background-color: #f8fafc;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}

.aiiu-dropzone:hover {
  border-color: #0284c7;
  background-color: #f0f9ff;
}

.aiiu-drop-icon {
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
}

.aiiu-drop-text {
  margin: 0 0 0.35rem 0;
  font-size: 0.85rem;
  color: #475569;
}

.aiiu-browse-link {
  color: #0284c7;
  font-weight: 600;
  text-decoration: underline;
}

.aiiu-file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.aiiu-file-status {
  font-size: 0.75rem;
  color: #64748b;
  font-weight: 600;
}

/* Form Groups & Sliders */
.aiiu-form-group {
  margin-bottom: 1rem;
}

.aiiu-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 0.35rem;
}

.aiiu-scale-buttons {
  display: flex;
  gap: 0.5rem;
}

.aiiu-scale-btn {
  flex: 1;
  background-color: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #334155;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.45rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.aiiu-scale-btn:hover {
  background-color: #e2e8f0;
}

.aiiu-scale-active {
  background-color: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

.aiiu-select {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #0f172a;
  background-color: #fff;
  box-sizing: border-box;
}

.aiiu-algo-desc {
  display: block;
  font-size: 0.75rem;
  color: #64748b;
  margin-top: 0.35rem;
  line-height: 1.4;
}

.aiiu-slider-group {
  margin-bottom: 0.85rem;
}

.aiiu-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.aiiu-slider-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: #0284c7;
}

.aiiu-range {
  width: 100%;
  accent-color: #0284c7;
  cursor: pointer;
}

/* Actions */
.aiiu-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.aiiu-btn-primary {
  background-color: #0284c7;
  color: #ffffff;
  border: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.65rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease;
  text-align: center;
}

.aiiu-btn-primary:hover {
  background-color: #0369a1;
}

.aiiu-btn-outline {
  background-color: transparent;
  border: 1px solid #cbd5e1;
  color: #475569;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.aiiu-btn-outline:hover {
  background-color: #f1f5f9;
  color: #0f172a;
}

/* Ads */
.aiiu-ad-wrapper {
  margin: 2rem 0;
  min-height: 280px;
  background-color: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Guide Section */
.aiiu-guide-section {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.aiiu-guide-article {
  margin-bottom: 2rem;
}

.aiiu-guide-article:last-child {
  margin-bottom: 0;
}

.aiiu-guide-article h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 0.75rem 0;
}

.aiiu-guide-article p {
  color: #334155;
  margin: 0 0 1rem 0;
  line-height: 1.6;
}

.aiiu-table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
}

.aiiu-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.aiiu-table th, .aiiu-table td {
  padding: 0.65rem 0.75rem;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.aiiu-table th {
  background-color: #f1f5f9;
  font-weight: 600;
  color: #1e293b;
}

.aiiu-guide-list {
  padding-left: 1.25rem;
  color: #334155;
  line-height: 1.7;
}

.aiiu-faq-list {
  margin: 0;
}

.aiiu-faq-q {
  font-weight: 700;
  color: #0f172a;
  margin-top: 1rem;
  font-size: 1rem;
}

.aiiu-faq-a {
  margin: 0.35rem 0 0.75rem 0;
  color: #475569;
  line-height: 1.5;
}

/* Related Tools */
.aiiu-related-tools {
  margin-bottom: 2rem;
}

.aiiu-related-heading {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 1rem;
}

.aiiu-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.aiiu-related-card {
  display: block;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1.25rem;
  text-decoration: none;
  transition: all 0.15s ease;
}

.aiiu-related-card:hover {
  border-color: #0284c7;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.aiiu-related-title {
  display: block;
  font-weight: 700;
  color: #0284c7;
  margin-bottom: 0.35rem;
}

.aiiu-related-desc {
  font-size: 0.85rem;
  color: #64748b;
  line-height: 1.4;
}

.aiiu-footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 2rem 1.5rem;
  font-size: 0.875rem;
  text-align: center;
}

.aiiu-footer-inner {
  max-width: 1150px;
  margin: 0 auto;
}

.aiiu-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background-color: #0f172a;
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 1000;
}