:root {
  --bg-dark: #090d16;
  --card-bg: rgba(17, 24, 39, 0.85);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-border: rgba(99, 102, 241, 0.35);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.25);
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-green-hover: #059669;
  --accent-red: #ef4444;
  
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

.app-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.25rem 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-text h1 span {
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-badges {
  display: flex;
  gap: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.03);
}

.badge-accent {
  color: #a78bfa;
  border-color: rgba(167, 139, 250, 0.25);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: #a78bfa;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.badge-cpu {
  color: var(--accent-green);
  border-color: rgba(16, 185, 129, 0.25);
}

/* Layout */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.5rem;
  flex: 1;
}

@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
}

/* Left: Video Stage */
.video-stage-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  min-height: 520px;
}

.dropzone {
  flex: 1;
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
  background: rgba(255, 255, 255, 0.015);
  transition: var(--transition);
  cursor: pointer;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

.upload-icon-wrapper {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.25rem;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.dropzone-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.dropzone-content p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

/* Video Player Container */
.video-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.canvas-viewport {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 440px;
  max-height: 640px;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Wrapper holds exactly the video and matching canvas */
.video-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  max-height: 100%;
}

#videoPlayer {
  max-width: 100%;
  max-height: 600px;
  display: block;
  object-fit: contain;
}

#overlayCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  user-select: none;
}

.selection-hint {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
  transition: opacity 0.3s;
}

.selection-hint.fade-out {
  opacity: 0;
}

/* Video Controls */
.video-controls {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 0.5rem 0;
}

.ctrl-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.ctrl-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.ctrl-btn.secondary {
  font-size: 0.75rem;
  padding: 0.45rem 0.75rem;
  gap: 0.4rem;
}

.time-display {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.timeline-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.timeline-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  cursor: pointer;
  transition: transform 0.1s;
}

.timeline-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* Right Sidebar */
.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.section-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
}

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

.status-indicator {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.status-indicator.ready {
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Specs Grid */
.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.spec-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.spec-val {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Coords Inputs */
.coords-inputs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.coord-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.coord-field label {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.coord-field input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.5rem;
  color: var(--text-main);
  font-family: monospace;
  font-size: 0.85rem;
  width: 100%;
}

.coord-field input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Methods List */
.methods-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.method-option {
  cursor: pointer;
}

.method-option input {
  display: none;
}

.method-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  transition: var(--transition);
}

.method-option:hover .method-card {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
}

.method-option input:checked + .method-card {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
}

.method-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
}

.method-name {
  font-size: 0.85rem;
  font-weight: 600;
}

.tag-pill {
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  font-weight: 700;
  text-transform: uppercase;
}

.tag-fast {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-smooth {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.tag-simple {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.method-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.35;
}

/* Time Range Mode Toggle */
.range-mode-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.2rem;
  gap: 0.2rem;
}

.toggle-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.4rem;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.custom-range-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.range-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.range-col label {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.range-col input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.5rem;
  color: var(--text-main);
  font-size: 0.85rem;
}

/* Action Buttons */
.actions-group {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: var(--transition);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.35);
}

.full-width {
  width: 100%;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
}

.modal-card {
  background: #111827;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.modal-card.modal-compact {
  max-width: 480px;
  text-align: center;
  padding: 2.5rem 2rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.modal-title h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.comp-col h4 {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.image-preview-wrapper {
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--card-border);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
}

/* Progress State Modal */
.progress-state {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.spinner-ring {
  width: 56px;
  height: 56px;
  border: 4px solid rgba(99, 102, 241, 0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1.25rem;
}

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

.progress-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  margin-bottom: 1.5rem;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-stats {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.stat-highlight {
  font-weight: 700;
  color: #fff;
}

.progress-frames {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Complete State */
.complete-state {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.success-icon-wrap {
  width: 64px;
  height: 64px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-green);
  margin-bottom: 1.25rem;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  margin-top: 1.5rem;
}

/* Utility */
.hidden {
  display: none !important;
}