/* VisionCortex vtracer Official Demo Style System */

:root {
  --bg-dark: #12141a;
  --bg-navbar: #181b22;
  --bg-panel: #1e222d;
  --bg-card: #262c3a;
  --bg-hover: #31384a;

  --border-color: #2b3142;
  --border-active: #4f46e5;

  --text-main: #f1f5f9;
  --text-sub: #94a3b8;
  --text-dim: #64748b;

  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --yellow-hover: #ffff00;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Navbar */
.navbar {
  height: 52px;
  background-color: var(--bg-navbar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.logo-svg {
  color: var(--accent);
}

.version-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background-color: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  padding: 2px 8px;
  border-radius: 12px;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s ease;
}
.nav-link:hover {
  color: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-download {
  background-color: var(--accent);
  color: #fff;
}
.btn-download:hover:not(:disabled) {
  background-color: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}
.btn-download:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* Main Layout Split */
.main-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Workspace Area (Left 3/4) */
.workspace-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.stage-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 20px;
  overflow: hidden;
  background-image: radial-gradient(#262c3a 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Dropzone Empty State */
.dropzone {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropzone-inner {
  max-width: 440px;
  text-align: center;
  padding: 40px;
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  background-color: var(--bg-panel);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--text-sub);
}
.dropzone-inner svg {
  color: var(--text-dim);
}
.dropzone-inner p {
  font-size: 0.9rem;
  line-height: 1.5;
}
.file-label {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
  font-weight: 500;
}
.dropzone.dragover .dropzone-inner {
  border-color: var(--accent);
  background-color: var(--bg-card);
}

/* Stage Content (Canvas + Overlaid SVG) */
.stage-content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  border-radius: 4px;
  overflow: hidden;
  background-color: #ffffff;
  transform-origin: center center;
  will-change: transform;
  transition: transform 0.05s ease-out;
}

#bitmap-canvas {
  display: block;
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
}

.svg-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  background-color: #ffffff;
  pointer-events: auto;
}
.svg-layer svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* B/W 黑白二值化模式视觉滤镜 */
.svg-layer.svg-layer-bw svg {
  filter: grayscale(100%) contrast(300%);
}

/* 官方 1:1 SVG 悬停黄色高亮特征 */
.svg-layer svg path:hover {
  stroke: var(--yellow-hover) !important;
  stroke-width: 2.5px !important;
  cursor: pointer;
  transition: stroke 0.1s ease;
}

/* Floating Zoom Controls Bar */
.zoom-controls-bar {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 50;
  background-color: rgba(24, 27, 34, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 4px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.zoom-btn {
  background: none;
  border: none;
  color: var(--text-sub);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}
.zoom-btn:hover {
  background-color: var(--bg-card);
  color: #fff;
}

.zoom-level-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-main);
  min-width: 44px;
  text-align: center;
  font-weight: 500;
}

.zoom-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-color);
}

.zoom-btn-reset {
  width: auto;
  padding: 0 10px;
  border-radius: 12px;
  gap: 4px;
  font-size: 0.75rem;
}
.zoom-btn-reset:hover {
  background-color: var(--bg-card);
  color: var(--accent);
}

.zoom-btn-compare {
  width: auto;
  padding: 0 10px;
  border-radius: 12px;
  gap: 6px;
  font-size: 0.75rem;
  color: #a5b4fc;
  background-color: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
}
.zoom-btn-compare:hover {
  background-color: rgba(99, 102, 241, 0.25);
  color: #fff;
  border-color: var(--accent);
}
.zoom-btn-compare.active {
  background-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
}

/* Processing Loader */
.processing-loader {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: rgba(24, 27, 34, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-sub);
}
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}



/* Options Panel (Right 1/4) */
.options-panel {
  width: 320px;
  background-color: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.option-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.control-label-wrap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.8rem;
  color: var(--text-sub);
}
.control-sublabel {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-style: italic;
}

/* Button Toggle Groups */
.btn-group {
  display: flex;
  background-color: var(--bg-navbar);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 2px;
}
.btn-toggle {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-sub);
  font-size: 0.78rem;
  padding: 6px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-toggle:hover {
  color: #fff;
}
.btn-toggle.active {
  background-color: var(--bg-card);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

/* Slider Controls */
.slider-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  height: 5px;
  background: var(--bg-navbar);
  border-radius: 3px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.1s ease;
}
input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.value-display {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-sub);
  min-width: 32px;
  text-align: right;
}