:root {
  --bg: #f4f5f7; --panel: #fff; --text: #1d2129; --muted: #6b7280; --border: #e3e5e8;
  --primary: #2f4bd8; --in: #15803d; --in-bg: #e8f6ee; --out: #b45309;
  --err: #b91c1c; --err-bg: #fdecec; --warn: #92400e; --warn-bg: #fff7e0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); }

.topbar { display: flex; align-items: center; gap: 12px; padding: 14px 20px; background: var(--text); color: #fff; }
.topbar h1 { font-size: 18px; margin: 0; }
.event-tag { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: rgba(255, 255, 255, .15); }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; max-width: 1100px; margin: 20px auto; padding: 0 16px; }
@media (max-width: 800px) { .layout { grid-template-columns: 1fr; } }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.panel > h2 { margin: 0 0 12px; font-size: 16px; }

.reader { width: 100%; min-height: 240px; background: #111; border-radius: 8px; overflow: hidden; }
.cam-controls { display: flex; gap: 8px; margin: 12px 0; }
.hint { font-size: 13px; color: var(--muted); }
.hint-error { color: var(--err); }

.field-label { display: block; font-size: 13px; color: var(--muted); margin: 16px 0 6px; }
.handheld { width: 100%; font: 16px ui-monospace, Consolas, monospace; padding: 12px; border: 2px solid var(--border); border-radius: 8px; }
.handheld:focus { outline: none; border-color: var(--primary); }
.handheld.input-warn { border-color: var(--warn); }
.kb-warning { margin-top: 10px; padding: 12px; border-radius: 8px; background: var(--warn-bg); color: var(--warn); font-size: 14px; }

.btn { font: inherit; font-size: 14px; padding: 10px 16px; border-radius: 8px; border: 1px solid transparent; background: var(--primary); color: #fff; cursor: pointer; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-big { font-size: 18px; padding: 14px 28px; font-weight: 600; }
.btn-in { background: var(--in); }
.btn-out { background: var(--out); }

.banner { padding: 14px 16px; border-radius: 8px; margin-bottom: 16px; font-weight: 600; }
.banner-success { background: var(--in-bg); color: var(--in); }
.banner-error { background: var(--err-bg); color: var(--err); }
.banner-warn { background: var(--warn-bg); color: var(--warn); }

.idle { color: var(--muted); text-align: center; padding: 48px 0; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.card-head h2 { font-size: 22px; margin: 0; }
.pill { font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; white-space: nowrap; background: #eef0f3; color: var(--muted); }
.pill-in { background: var(--in-bg); color: var(--in); }
.card-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.card-meta dt { font-size: 12px; color: var(--muted); }
.card-meta dd { margin: 2px 0 0; font-size: 16px; font-weight: 600; }
.card-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.countdown { font-size: 13px; color: var(--muted); margin: 12px 0 0; }