:root {
  color-scheme: dark;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #f8fafc;
}

* {
  box-sizing: border-box;
}

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

body {
  display: grid;
  place-items: center;
  padding: 18px;
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.18), transparent 34%),
    linear-gradient(135deg, #111827 0%, #1e293b 48%, #0f172a 100%);
}

.scanner {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 16px;
}

.camera-panel,
.result-panel {
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.78);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

.camera-panel {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #020617;
}

.scan-frame {
  position: absolute;
  inset: 17%;
  border: 2px solid rgba(45, 212, 191, 0.92);
  border-radius: 8px;
  box-shadow: 0 0 0 999px rgba(2, 6, 23, 0.34);
  pointer-events: none;
}

.status {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.78);
  color: #e2e8f0;
  font-size: 14px;
  line-height: 1.45;
}

.result-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
}

label {
  color: #cbd5e1;
  font-size: 14px;
}

textarea {
  width: 100%;
  min-height: 220px;
  flex: 1;
  resize: vertical;
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 8px;
  padding: 12px;
  background: rgba(2, 6, 23, 0.72);
  color: #f8fafc;
  font: 16px/1.5 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  background: #14b8a6;
  color: #042f2e;
  font: 700 15px/1 system-ui, sans-serif;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

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

@media (max-width: 760px) {
  body {
    align-items: start;
    padding: 12px;
  }

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

  .camera-panel {
    min-height: 280px;
  }

  textarea {
    min-height: 160px;
  }
}