.scanner-core { margin: 38px 0 0; overflow: hidden; border: 1px solid var(--border); background: #0B1020; }
.core-heading, .core-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 22px; font-size: 0.72rem; letter-spacing: 0.08em; }
.core-heading { color: var(--muted); border-bottom: 1px solid var(--line); }
.core-heading i { display: inline-block; width: 6px; height: 6px; margin-right: 8px; background: var(--cyan); border-radius: 50%; }
.core-viewport { position: relative; height: clamp(320px, 48vw, 500px); background: radial-gradient(ellipse at 50% 48%, #20304780, transparent 65%), linear-gradient(#4DEEEA06 1px, transparent 1px), linear-gradient(90deg, #4DEEEA06 1px, transparent 1px); background-size: auto, 40px 40px, 40px 40px; }
.core-canvas { display: block; width: 100%; height: 100%; opacity: 0; }
.core-ready .core-canvas { opacity: 1; }
.core-fallback { position: absolute; inset: 0; margin: auto; width: 220px; height: 220px; }
.core-ready .core-fallback { display: none; }
.core-coordinate, .core-caption { position: absolute; pointer-events: none; font-size: 0.65rem; line-height: 1.8; letter-spacing: 0.08em; color: var(--muted); }
.core-coordinate { left: 22px; top: 22px; }
.core-caption { right: 22px; bottom: 20px; text-align: right; }
.core-footer { border-top: 1px solid var(--line); flex-wrap: wrap; }
.core-status { color: var(--cyan); min-width: 150px; }
.core-note { color: var(--muted); font-size: 0.6rem; }
.core-toggle { background: transparent; border: 1px solid var(--border); padding: 7px 10px; color: var(--text); font: inherit; cursor: pointer; }
.core-toggle:hover { border-color: var(--cyan); }
.core-toggle:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
@media (max-width: 680px) {
  .core-heading, .core-footer { padding: 13px 14px; gap: 10px; font-size: 0.62rem; }
  .core-coordinate { left: 14px; top: 14px; font-size: 0.55rem; }
  .core-caption { right: 14px; bottom: 12px; font-size: 0.55rem; }
  .core-note { display: none; }
}