/* ==========================================================================
   Apple-Style Light Design System for VINA Dewarping & OCR Studio
   ========================================================================== */

:root {
  --apple-bg: #F5F5F7;
  --apple-card-bg: #FFFFFF;
  --apple-text-primary: #1D1D1F;
  --apple-text-secondary: #86868B;
  --apple-text-tertiary: #A1A1A6;
  --apple-blue: #0071E3;
  --apple-blue-hover: #0077ED;
  --apple-blue-light: #EBF4FF;
  --apple-green: #34C759;
  --apple-green-light: #EAF8EE;
  --apple-orange: #FF9500;
  --apple-card-border: rgba(0, 0, 0, 0.06);
  --apple-divider: rgba(0, 0, 0, 0.05);
  
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.03);
  --shadow-float: 0 20px 48px rgba(0, 0, 0, 0.12);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", sans-serif;
  --font-mono: "JetBrains Mono", Menlo, Consolas, monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--apple-bg);
  color: var(--apple-text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  padding-bottom: 60px;
}

/* ==========================================================================
   Header (Apple Glassmorphism)
   ========================================================================== */
.apple-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--apple-card-border);
  padding: 12px 0;
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--apple-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 113, 227, 0.25);
}

.brand-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--apple-text-primary);
  display: block;
  letter-spacing: -0.2px;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--apple-text-secondary);
  display: block;
}

.header-badges {
  display: flex;
  gap: 10px;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
}

.gpu-badge {
  background: var(--apple-green-light);
  color: #1a7431;
  border: 1px solid rgba(52, 199, 89, 0.2);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: var(--apple-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(52, 199, 89, 0.7);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(52, 199, 89, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0); }
}

.model-badge {
  background: var(--apple-blue-light);
  color: var(--apple-blue);
  border: 1px solid rgba(0, 113, 227, 0.15);
}

/* ==========================================================================
   Layout & Cards
   ========================================================================== */
.app-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-section {
  text-align: center;
  padding: 20px 0 8px;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.6px;
  color: var(--apple-text-primary);
  margin-bottom: 8px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--apple-text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

.apple-card {
  background: var(--apple-card-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--apple-card-border);
  box-shadow: var(--shadow-subtle);
  padding: 24px;
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-card:hover {
  box-shadow: var(--shadow-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.card-header h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.section-desc {
  font-size: 13px;
  color: var(--apple-text-secondary);
  margin-top: 2px;
}

/* ==========================================================================
   Segment Controls & Buttons
   ========================================================================== */
.segment-control {
  display: inline-flex;
  background: #EAEAEA;
  padding: 4px;
  border-radius: 100px;
}

.segment-btn {
  border: none;
  background: transparent;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--apple-text-secondary);
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.segment-btn.active {
  background: #FFFFFF;
  color: var(--apple-text-primary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-apple-primary {
  background: var(--apple-blue);
  color: #fff;
  border: none;
  border-radius: 100px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.btn-apple-primary:hover {
  background: var(--apple-blue-hover);
  transform: scale(1.01);
}

.btn-apple-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #F0F0F2;
  color: var(--apple-text-primary);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 100px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-apple-secondary:hover {
  background: #E5E5EA;
}

/* ==========================================================================
   Dataset Samples Grid
   ========================================================================== */
.hub-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-restore-samples {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F0F0F2;
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--apple-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-restore-samples:hover {
  background: #E5E5EA;
  color: var(--apple-text-primary);
}

.samples-carousel-wrapper {
  overflow-x: auto;
  padding-bottom: 8px;
}

.samples-grid {
  display: flex;
  gap: 14px;
  min-width: 100%;
}

.sample-item-card {
  position: relative;
  flex: 0 0 160px;
  background: #FAFAFC;
  border: 1px solid var(--apple-card-border);
  border-radius: var(--radius-md);
  padding: 10px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.btn-remove-sample {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #888;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s ease;
  z-index: 5;
}

.sample-item-card:hover .btn-remove-sample {
  opacity: 1;
}

.btn-remove-sample:hover {
  background: #FF3B30;
  color: #fff;
  border-color: #FF3B30;
  transform: scale(1.1);
}

.sample-item-card:hover {
  background: #FFFFFF;
  border-color: var(--apple-blue);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0, 113, 227, 0.12);
}

.sample-item-card.active {
  border-color: var(--apple-blue);
  background: var(--apple-blue-light);
}

.sample-thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  background: #eee;
  margin-bottom: 8px;
}

.sample-item-card .sample-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--apple-text-primary);
  line-height: 1.3;
  max-height: 2.6em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sample-item-card .sample-tag {
  font-size: 10px;
  color: var(--apple-text-secondary);
  margin-top: 4px;
}

/* ==========================================================================
   Upload Dropzone
   ========================================================================== */
.drop-zone {
  border: 2px dashed rgba(0, 113, 227, 0.3);
  background: #FBFBFE;
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--apple-blue);
  background: var(--apple-blue-light);
}

.file-input-hidden {
  display: none;
}

.upload-icon-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--apple-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.drop-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.drop-content p {
  font-size: 13px;
  color: var(--apple-text-secondary);
  margin-bottom: 18px;
}

/* ==========================================================================
   Stepper Indicator
   ========================================================================== */
.stepper-section {
  padding: 6px 0;
}

.stepper-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--apple-card-bg);
  border: 1px solid var(--apple-card-border);
  border-radius: var(--radius-xl);
  padding: 16px 28px;
  box-shadow: var(--shadow-subtle);
}

.step-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #E5E5EA;
  color: var(--apple-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.step-item.active .step-circle {
  background: var(--apple-blue);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 113, 227, 0.3);
}

.step-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--apple-text-secondary);
}

.step-item.active .step-label {
  color: var(--apple-text-primary);
  font-weight: 600;
}

.step-connector {
  flex: 1;
  height: 2px;
  background: #E5E5EA;
  margin: 0 16px;
}

/* ==========================================================================
   Status Banner
   ========================================================================== */
.status-banner {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--apple-card-bg);
  border-radius: var(--radius-lg);
  padding: 18px 24px;
  border: 1px solid rgba(0, 113, 227, 0.2);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.08);
}

.spinner-apple {
  width: 28px;
  height: 28px;
  border: 3px solid var(--apple-blue-light);
  border-top-color: var(--apple-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.status-banner-text h4 {
  font-size: 15px;
  font-weight: 600;
}

.status-banner-text p {
  font-size: 13px;
  color: var(--apple-text-secondary);
}

/* ==========================================================================
   Workbench Grid (Image Comparison & Text)
   ========================================================================== */
.workbench-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
}

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

.card-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge-accent {
  background: #F0F0F2;
  color: var(--apple-text-secondary);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 100px;
  font-family: var(--font-mono);
}

.view-toggle-pills {
  display: flex;
  gap: 6px;
}

.pill-btn {
  border: none;
  background: #F0F0F2;
  color: var(--apple-text-secondary);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill-btn.active {
  background: var(--apple-blue);
  color: #fff;
}

/* Split Slider */
.split-slider-container {
  position: relative;
  width: 100%;
  height: 480px;
  background: #111;
  border-radius: var(--radius-lg);
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

.image-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.dewarped-wrapper {
  width: 50%;
  border-right: 2px solid #FFFFFF;
}

.image-tag {
  position: absolute;
  top: 14px;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  pointer-events: none;
  font-weight: 500;
}

.tag-left { left: 14px; }
.tag-right { right: 14px; }

.split-handle {
  position: absolute;
  top: 0;
  left: 50%;
  bottom: 0;
  width: 40px;
  margin-left: -20px;
  cursor: ew-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.handle-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
}

.side-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  height: 480px;
}

.side-pane {
  background: #111;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 10px;
}

.side-pane h4 {
  color: #aaa;
  font-size: 12px;
  margin-bottom: 6px;
  text-align: center;
}

.side-pane img {
  width: 100%;
  height: calc(100% - 24px);
  object-fit: contain;
}

.annotated-container {
  height: 480px;
  background: #111;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 10px;
}

.annotated-container h4 {
  color: #aaa;
  font-size: 12px;
  margin-bottom: 6px;
}

.annotated-container img {
  width: 100%;
  height: calc(100% - 24px);
  object-fit: contain;
}

.card-footer-actions {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

/* ==========================================================================
   Text & OCR Data Card
   ========================================================================== */
.ocr-text-box {
  background: #FAFAFC;
  border: 1px solid var(--apple-card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  max-height: 160px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: var(--apple-text-primary);
  margin-bottom: 16px;
}

.btn-copy-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F0F0F2;
  border: none;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  color: var(--apple-text-primary);
}

.btn-copy-text:hover {
  background: #E5E5EA;
}

.mini-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--apple-text-secondary);
  margin-bottom: 8px;
}

.tokens-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 120px;
  overflow-y: auto;
  margin-bottom: 18px;
}

.token-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F0F4FA;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  color: #1D3557;
  border: 1px solid rgba(0, 113, 227, 0.1);
}

.token-conf {
  font-size: 10px;
  font-weight: 600;
  color: var(--apple-blue);
}

/* Codes Box */
.codes-box {
  background: var(--apple-green-light);
  border: 1px solid rgba(52, 199, 89, 0.3);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 16px;
}

.code-badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: #1a7431;
}

/* Catalog Benchmark */
.catalog-benchmark-box {
  background: #FBFBFE;
  border: 1px solid var(--apple-card-border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
}

.bench-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.badge-success {
  font-size: 11px;
  background: var(--apple-green-light);
  color: #1a7431;
  padding: 2px 8px;
  border-radius: 100px;
  font-weight: 500;
}

.bench-content {
  display: flex;
  gap: 16px;
  align-items: center;
}

.bench-thumbs {
  display: flex;
  gap: 8px;
}

.thumb-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 10px;
  color: var(--apple-text-secondary);
}

.thumb-col img {
  width: 50px;
  height: 65px;
  object-fit: cover;
  border-radius: 4px;
  margin-top: 4px;
  border: 1px solid #ddd;
}

.metrics-grid {
  display: flex;
  gap: 16px;
  flex: 1;
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.m-val {
  font-size: 20px;
  font-weight: 700;
  color: var(--apple-blue);
  letter-spacing: -0.5px;
}

.m-lbl {
  font-size: 11px;
  color: var(--apple-text-secondary);
}

/* Latency Bars */
.latency-stats-box {
  background: #FAFAFC;
  border-radius: var(--radius-md);
  padding: 14px;
}

.badge-perf {
  font-size: 12px;
  font-weight: 600;
  color: var(--apple-text-primary);
  background: #EAEAEA;
  padding: 2px 8px;
  border-radius: 100px;
}

.latency-bars {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.latency-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
}

.latency-name {
  width: 110px;
  color: var(--apple-text-secondary);
}

.latency-track {
  flex: 1;
  height: 6px;
  background: #E5E5EA;
  border-radius: 100px;
  overflow: hidden;
}

.latency-fill {
  height: 100%;
  background: var(--apple-blue);
  border-radius: 100px;
}

.latency-ms {
  width: 55px;
  text-align: right;
  font-family: var(--font-mono);
  color: var(--apple-text-primary);
}

/* ==========================================================================
   Diagnostics & 5-Stage Deep Dive
   ========================================================================== */
.stage-tabs-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.stage-tab-btn {
  border: none;
  background: #F0F0F2;
  color: var(--apple-text-secondary);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.stage-tab-btn.active {
  background: var(--apple-blue);
  color: #fff;
}

.stage-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.stage-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

@media (max-width: 1100px) {
  .stage-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

@media (max-width: 860px) {
  .stage-grid-3, .stage-grid-2 {
    grid-template-columns: 1fr;
  }
}

.stage-subcard {
  background: #FBFBFE;
  border: 1px solid var(--apple-card-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.stage-subcard h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.stage-subcard p {
  font-size: 12px;
  color: var(--apple-text-secondary);
  margin-bottom: 12px;
}

.stage-img-frame {
  width: 100%;
  height: 480px;
  background: #111;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.stage-img-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.math-params-card {
  display: flex;
  flex-direction: column;
}

.params-table {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.param-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: #FFFFFF;
  border-radius: 8px;
  border: 1px solid var(--apple-card-border);
  font-size: 13px;
}

.param-key {
  color: var(--apple-text-secondary);
}

.param-val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--apple-text-primary);
}

.apple-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.apple-list li {
  font-size: 13px;
  line-height: 1.5;
  color: var(--apple-text-primary);
  background: #FFFFFF;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--apple-card-border);
}

/* ==========================================================================
   Toast Notification & Utilities
   ========================================================================== */
.toast-notification {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(29, 29, 31, 0.9);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 10px 22px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-float);
  z-index: 1000;
  transition: all 0.3s ease;
}

.hidden {
  display: none !important;
}