:root {
  --bg: #0f0f11;
  --surface: #18181b;
  --surface-2: #232329;
  --border: #2a2a2e;
  --text: #e4e4e7;
  --text-dim: #a1a1aa;
  --accent: #39ff14;
  --accent-dim: #2cd60e;
  --danger: #ff4d4f;
  --radius: 0;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px 32px;
}

.header {
  text-align: center;
  margin-bottom: 40px;
}

.title {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 52px);
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 12px;
  line-height: 1.15;
  color: var(--text);
  position: relative;
  display: inline-block;
}

.title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 6px;
  background-color: var(--accent);
  opacity: 0.85;
  z-index: -1;
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main {
  width: 100%;
  max-width: 960px;
}

.result-panel {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 24px;
  display: none;
  position: relative;
}

.result-panel.visible {
  display: block;
  animation: slideDown 0.25s ease-out;
}

.result-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.result-text {
  margin: 0 0 16px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 24px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 24px;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-desc {
  margin: 0 0 20px;
  color: var(--text-dim);
  font-size: 14px;
}

.dropzone {
  border: 2px dashed var(--border);
  background-color: var(--surface-2);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-dim);
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragover {
  border-color: var(--accent);
  box-shadow: 0 0 18px rgba(57, 255, 20, 0.12);
  background-color: #1c1c20;
  color: var(--text);
  outline: none;
}

.dropzone svg {
  color: var(--accent);
  opacity: 0.8;
}

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

.dropzone-text {
  font-size: 15px;
  font-weight: 500;
}

.dropzone-hint {
  font-size: 12px;
  opacity: 0.7;
}

.camera-controls {
  margin-bottom: 16px;
}

.select-label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.camera-select {
  width: 100%;
  padding: 10px 12px;
  background-color: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 14px;
  margin-bottom: 12px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
}

.camera-select:focus-visible {
  outline: none;
  border-color: var(--accent);
}

.camera-buttons {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border);
  background-color: transparent;
  color: var(--text);
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  min-height: 44px;
}

.btn:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.14);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  flex: 1;
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
  background-color: rgba(57, 255, 20, 0.08);
}

.btn-secondary {
  flex: 1;
}

.btn-copy {
  width: 100%;
  border-color: var(--accent);
  color: var(--accent);
}

.btn-copy:hover {
  background-color: rgba(57, 255, 20, 0.08);
}

.video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: #000;
  border: 1px solid var(--border);
  overflow: hidden;
  display: none;
}

.video-wrap.active {
  display: block;
}

.video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background-color: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  opacity: 0;
  pointer-events: none;
}

.video-wrap.active .scan-line {
  opacity: 1;
  animation: scan 2s ease-in-out infinite;
}

.footer {
  margin-top: 40px;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.8;
}

.footer p {
  margin: 0;
}

.status {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
}

.status.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.status.error {
  border-color: var(--danger);
  color: var(--danger);
}

.offscreen-canvas {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

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

@keyframes scan {
  0% {
    top: 0;
  }
  50% {
    top: 100%;
  }
  100% {
    top: 0;
  }
}

@media (max-width: 768px) {
  .page {
    padding: 32px 16px 24px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 20px;
  }

  .dropzone {
    padding: 28px 20px;
  }

  .camera-buttons {
    flex-direction: column;
  }
}