* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', sans-serif; background: #0f172a; color: #f1f5f9; }
.screen { display: none; padding: 2rem; min-height: 100vh; }
.screen.active { display: block; }
#screen-login { display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 1rem; }
.pin-input { padding: 0.75rem 1.5rem; font-size: 1.5rem; text-align: center;
  border-radius: 10px; border: none; background: #1e293b; color: #f1f5f9; width: 200px; }
.btn-primary { padding: 0.75rem 2rem; background: #2563eb; color: #f1f5f9;
  border: none; border-radius: 10px; cursor: pointer; font-size: 1rem; }
.back-link { color: #94a3b8; text-decoration: none; margin-top: 1rem; }
.error-msg { color: #f87171; }
.hidden { display: none; }
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
h1 { font-size: 1.5rem; }
.btn-secondary { padding: 0.5rem 1.5rem; background: #334155; color: #f1f5f9;
  border: none; border-radius: 8px; cursor: pointer; text-decoration: none; font-size: 0.9rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: #1e293b; border-radius: 12px; padding: 1.5rem; text-align: center; }
.stat-card span { font-size: 2.5rem; font-weight: bold; display: block; color: #3b82f6; }
.stat-card label { color: #94a3b8; font-size: 0.85rem; }
.controls { background: #1e293b; border-radius: 12px; padding: 1.5rem;
  margin-bottom: 2rem; display: flex; flex-direction: column; gap: 1rem; }
.control-group { display: flex; align-items: center; gap: 1rem; }
.control-group label { color: #94a3b8; min-width: 200px; }
select { padding: 0.5rem; background: #334155; color: #f1f5f9;
  border: none; border-radius: 8px; font-size: 1rem; }
.token-input { flex: 1; padding: 0.5rem 1rem; background: #334155; color: #f1f5f9;
  border: none; border-radius: 8px; font-size: 0.9rem; }
.btn-action { padding: 0.75rem 2rem; background: #059669; color: white;
  border: none; border-radius: 10px; cursor: pointer; font-size: 1rem; width: fit-content; }
.sync-status { color: #94a3b8; font-size: 0.9rem; }
.log-section { background: #1e293b; border-radius: 12px; padding: 1.5rem; }
h3 { margin-bottom: 1rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { text-align: left; padding: 0.5rem; color: #94a3b8; border-bottom: 1px solid #334155; }
td { padding: 0.5rem; border-bottom: 1px solid #1e293b; }
tr.success td:nth-child(3) { color: #34d399; }
tr.rejected td:nth-child(3) { color: #f87171; }
tr.not_found td:nth-child(3) { color: #fbbf24; }