:root {
  --bg-main: #0b0f19;
  --bg-card: #131a2a;
  --bg-card-hover: #182238;
  --bg-subtle: #1e293b;
  --border-color: #23304a;
  --border-glow: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --cyan: #06b6d4;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-wrapper {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background-color: #0f172a;
  border-bottom: 1px solid var(--border-color);
  z-index: 10;
}

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

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #1d4ed8, #06b6d4);
  color: #fff;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #f8fafc, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--warning);
}

.status-dot.online {
  background-color: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.status-dot.pulsing {
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.15); }
}

/* Main Layout */
.main-container {
  display: grid;
  grid-template-columns: 1fr 420px;
  flex: 1;
  overflow: hidden;
}

@media (max-width: 960px) {
  .main-container {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
    overflow-y: auto;
  }
  .app-wrapper {
    height: auto;
    overflow: auto;
  }
}

/* Viewer Section */
.viewer-section {
  display: flex;
  flex-direction: column;
  padding: 16px;
  background-color: #080c14;
  position: relative;
  overflow: hidden;
}

.dropzone {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  background-color: rgba(19, 26, 42, 0.4);
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  padding: 32px;
  text-align: center;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background-color: rgba(59, 130, 246, 0.08);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.15) inset;
}

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

.dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  max-width: 480px;
}

.drop-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  margin-bottom: 4px;
}

.drop-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-hint {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

kbd {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
}

.drop-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: 8px;
}

.tag {
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 9999px;
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Canvas Wrapper */
.canvas-wrapper {
  display: flex;
  flex-direction: column;
  flex: 1;
  height: 100%;
  border-radius: var(--radius-lg);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: #111827;
  border-bottom: 1px solid var(--border-color);
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Crop Action Bar */
.crop-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: rgba(59, 130, 246, 0.12);
  border-bottom: 1px solid rgba(59, 130, 246, 0.25);
  color: #93c5fd;
  font-size: 0.82rem;
  gap: 12px;
  flex-wrap: wrap;
  animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
  from { transform: translateY(-8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.crop-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.crop-hint svg {
  color: #38bdf8;
  flex-shrink: 0;
}

.crop-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.canvas-scroll-box {
  flex: 1;
  position: relative;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #030712;
  background-image: 
    radial-gradient(#1e293b 1px, transparent 1px);
  background-size: 20px 20px;
  padding: 16px;
}

canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-radius: var(--radius-sm);
  user-select: none;
}

canvas.crop-mode {
  cursor: crosshair !important;
}

/* Scanner Animation */
.scan-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.scanner-laser {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #06b6d4, #3b82f6, transparent);
  box-shadow: 0 0 15px #06b6d4, 0 0 30px #3b82f6;
  animation: laserScan 1.6s ease-in-out infinite alternate;
}

@keyframes laserScan {
  0% { top: 10%; opacity: 0.3; }
  50% { opacity: 1; }
  100% { top: 90%; opacity: 0.3; }
}

/* Results Section */
.results-section {
  background-color: var(--bg-card);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow-y: auto;
  gap: 16px;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  gap: 8px;
}

.results-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toggle-xs {
  font-size: 0.72rem;
}

.toggle-xs .toggle-slider {
  width: 26px;
  height: 14px;
}

.toggle-xs .toggle-slider::before {
  width: 10px;
  height: 10px;
  left: 2px;
  top: 2px;
}

.toggle-xs input:checked + .toggle-slider::before {
  transform: translateX(12px);
}

.toggle-xs .toggle-label {
  font-size: 0.72rem;
  color: #38bdf8;
  font-weight: 500;
}

.gpon-tag {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 3px;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
  text-transform: uppercase;
  margin-right: 6px;
  letter-spacing: 0.04em;
}

.gpon-secondary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(16, 185, 129, 0.08);
  border: 1px dashed rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  gap: 8px;
  margin-top: 4px;
}

.gpon-secondary-row .barcode-text {
  color: #34d399;
  font-size: 0.88rem;
}

.btn-toggle-format {
  background: transparent;
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38bdf8;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-toggle-format:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: #38bdf8;
}

.results-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  border-radius: 9999px;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0 6px;
}

.meta-time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
}

/* Results List & Cards */
.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.barcode-card {
  background-color: #0f172a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.barcode-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary);
  opacity: 0.8;
}

.barcode-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.format-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stage-badge {
  font-size: 0.65rem;
  color: var(--text-muted);
}

.barcode-value-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  gap: 8px;
}

.barcode-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: #38bdf8;
  word-break: break-all;
  user-select: all;
}

.btn-copy {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.btn-copy:hover {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-copy.copied {
  color: var(--success);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  gap: 12px;
}

.empty-icon {
  color: var(--text-muted);
  opacity: 0.5;
}

.empty-state h4 {
  color: var(--text-secondary);
  font-size: 1rem;
}

.empty-state p {
  font-size: 0.8rem;
  line-height: 1.5;
  max-width: 320px;
}

.troubleshoot-box {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  text-align: left;
  margin-top: 6px;
  max-width: 360px;
}

.troubleshoot-title {
  font-weight: 600;
  color: #38bdf8 !important;
  font-size: 0.8rem !important;
  margin-bottom: 8px;
}

.troubleshoot-list {
  padding-left: 18px;
  font-size: 0.76rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
  line-height: 1.4;
}

.troubleshoot-list li strong {
  color: var(--text-primary);
}

/* Alert Box */
.alert-box {
  padding: 12px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  background-color: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

/* API Card Footer */
.api-card {
  margin-top: auto;
  background-color: #0b101c;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: 0.8rem;
}

.api-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.api-method {
  background: var(--success);
  color: #000;
  font-weight: 700;
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 3px;
}

.api-url {
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.api-desc {
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-size: 0.75rem;
}

.api-snippet {
  background-color: #060911;
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #93c5fd;
  overflow-x: auto;
  white-space: pre-wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.btn-secondary {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--primary);
}

.btn-secondary.active {
  background-color: rgba(59, 130, 246, 0.2);
  border-color: var(--primary);
  color: #60a5fa;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

/* Toggle switch */
.toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.toggle-control input {
  display: none;
}

.toggle-slider {
  width: 34px;
  height: 18px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  position: relative;
  transition: background-color 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  left: 2px;
  top: 2px;
  border-radius: 50%;
  background-color: var(--text-secondary);
  transition: transform 0.2s;
}

.toggle-control input:checked + .toggle-slider {
  background-color: var(--primary);
  border-color: var(--primary);
}

.toggle-control input:checked + .toggle-slider::before {
  transform: translateX(16px);
  background-color: #fff;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}

.toast {
  background-color: #1e293b;
  border: 1px solid var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.hidden {
  display: none !important;
}