:root {
  --primary: #1c6dd0;
  --primary-dark: #12508f;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #dfe4ea;
  --text: #1f2937;
  --muted: #6b7280;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

header.topbar {
  background: var(--primary);
  color: #fff;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

header.topbar .brand {
  font-weight: 700;
  font-size: 18px;
  white-space: nowrap;
}

nav.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

nav.tabs a {
  color: #eaf1fc;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
}

nav.tabs a:hover, nav.tabs a.active {
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-weight: 600;
}

.role-badge {
  background: rgba(255,255,255,0.18);
  color: #fff;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

header.topbar button.secondary {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.5);
}
header.topbar button.secondary:hover { background: rgba(255,255,255,0.15); }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}

h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 0 0 10px; }
h3 { font-size: 15px; margin: 0 0 8px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.stat {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}
.stat .num { font-size: 22px; font-weight: 700; color: var(--primary-dark); }
.stat .label { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

form .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 5px;
  color: #374151;
}

input, select, textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
  font-family: inherit;
}
textarea { resize: vertical; min-height: 60px; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(28,109,208,0.15);
}

button, .btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 8px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button.secondary, .btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
button.danger, .btn.danger { background: var(--danger); }
button.success, .btn.success { background: var(--success); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
th, td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.02em; }
tr:hover td { background: #f9fafb; }
.table-wrap { overflow-x: auto; }

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
}
.badge.available { background: #dcfce7; color: #166534; }
.badge.rented { background: #fef3c7; color: #92400e; }
.badge.active { background: #dbeafe; color: #1e40af; }
.badge.closed, .badge.returned { background: #e5e7eb; color: #374151; }

.muted { color: var(--muted); }
.mono { font-family: "SF Mono", Consolas, monospace; }
.right { text-align: right; }
.center { text-align: center; }
.flex { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.flex.between { justify-content: space-between; }
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 999;
  max-width: 90vw;
}
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }

.qr-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

#reader { width: 100%; max-width: 420px; margin: 0 auto; }

.scan-input {
  width: 100%;
  font-size: 22px;
  padding: 16px 14px;
  border: 2px solid var(--primary);
  border-radius: 10px;
  text-align: center;
  font-family: "SF Mono", Consolas, monospace;
}

.scan-flash {
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  font-size: 17px;
  font-weight: 700;
  min-height: 24px;
  transition: background 0.15s ease;
  background: #eef2f7;
  color: var(--muted);
}
.scan-flash.ok { background: #dcfce7; color: #166534; }
.scan-flash.err { background: #fee2e2; color: #991b1b; }

.scan-count {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1;
}

.scan-list {
  max-height: 46vh;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.scan-list-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.scan-list-row:first-child { background: #f0f7ff; }
.scan-list-row:last-child { border-bottom: none; }

.empty-state { text-align: center; padding: 30px; color: var(--muted); }

a { color: var(--primary); }

@media print {
  header.topbar, nav.tabs, .no-print { display: none !important; }
  body { background: #fff; }
  main { max-width: none; padding: 0; margin: 0; }
}