* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "PingFang HK", "Microsoft JhengHei", "Segoe UI", Roboto, sans-serif;
  background: #f4f6fa;
  color: #1f2937;
  -webkit-font-smoothing: antialiased;
}

/* top bar */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  height: 56px;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
}
.brand { font-weight: 700; font-size: 17px; }
.topbar nav { display: flex; gap: 4px; }
.topbar nav a {
  text-decoration: none;
  color: #4b5563;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
}
.topbar nav a:hover { background: #f3f4f6; }
.topbar nav a.active { background: #eef2ff; color: #2563eb; font-weight: 600; }
.logout { margin-left: auto; text-decoration: none; color: #6b7280; font-size: 14px; }
.logout:hover { color: #dc2626; }

.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }
.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 18px;
}
.card-label { font-size: 13px; color: #6b7280; margin-bottom: 6px; }
.card-value { font-size: 26px; font-weight: 700; }
.card-value.pos { color: #16a34a; }
.card-value.neg { color: #dc2626; }
.card-sub { font-size: 13px; color: #6b7280; margin-top: 4px; }

/* panels */
.panel {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.panel h3 { margin: 0 0 14px; font-size: 16px; }

/* table */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #f3f4f6; }
th { color: #6b7280; font-weight: 600; font-size: 13px; }
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; }
td.right { text-align: right; }
tbody tr:hover { background: #f9fafb; }
.cat {
  font-size: 11px;
  color: #6b7280;
  background: #f3f4f6;
  border-radius: 4px;
  padding: 2px 6px;
  margin-left: 6px;
}
.sub { color: #9ca3af; font-size: 12px; }
.empty { text-align: center; color: #9ca3af; padding: 24px; }

/* forms */
input[type="text"], input[type="password"], input[type="date"] {
  padding: 8px 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}
input:focus { outline: 2px solid #bfdbfe; border-color: #2563eb; }
.field-label { display: inline-block; margin-right: 8px; font-size: 14px; color: #374151; }
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; }
.inline-form input[type="text"] { flex: 1; min-width: 140px; }

/* buttons */
.btn {
  border: 1px solid #d1d5db;
  background: #fff;
  color: #374151;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
}
.btn:hover { background: #f3f4f6; }
.btn.primary { background: #2563eb; border-color: #2563eb; color: #fff; }
.btn.primary:hover { background: #1d4ed8; }
.btn.danger { color: #dc2626; }
.btn.danger:hover { background: #fef2f2; border-color: #fca5a5; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.block { width: 100%; }
.inline { display: inline-block; margin-left: 6px; }

/* tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs a {
  text-decoration: none;
  padding: 8px 20px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid #e5e7eb;
  color: #4b5563;
  font-size: 14px;
}
.tabs a.active { background: #2563eb; border-color: #2563eb; color: #fff; font-weight: 600; }

/* pills */
.pill { font-size: 12px; padding: 3px 9px; border-radius: 999px; }
.pill.on { background: #dcfce7; color: #16a34a; }
.pill.off { background: #f3f4f6; color: #6b7280; }

/* flash */
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: #dcfce7; color: #166534; }
.flash.err { background: #fee2e2; color: #991b1b; }

/* login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 32px;
  width: 320px;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}
.login-card h1 { margin: 0 0 20px; font-size: 22px; text-align: center; }
.login-card label { display: block; font-size: 13px; color: #6b7280; margin-bottom: 6px; }
.login-card input { width: 100%; margin-bottom: 16px; }
.login-card .btn { width: 100%; }

@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; height: auto; padding: 10px 12px; gap: 8px; }
  .logout { margin-left: auto; }
}