:root {
  --bg: #f6f7f9; --card: #fff; --text: #1d2229; --muted: #6b7280; --line: #e3e6ea;
  --accent: #1f5fbf; --accent-2: #174a95; --ok: #1a7f4b; --warn: #b45309; --bad: #b3261e;
  --over: #fde8e6; --under: #e6f0fb; --radius: 8px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--accent); }
h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 16px; margin: 20px 0 8px; }
.muted { color: var(--muted); }
.error { color: var(--bad); }
.top { display: flex; align-items: center; gap: 18px; padding: 10px 20px; background: var(--card);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top .brand { font-weight: 700; text-decoration: none; color: var(--text); }
.top nav { display: flex; gap: 4px; flex: 1; }
.top nav a { padding: 6px 10px; border-radius: 6px; text-decoration: none; color: var(--text); }
.top nav a.active { background: var(--accent); color: #fff; }
main#app { padding: 20px; max-width: 1400px; margin: 0 auto; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; }
.toolbar .spacer { flex: 1; }
.btn { border: 1px solid var(--line); background: #fff; color: var(--text); padding: 6px 12px; border-radius: 6px;
  cursor: pointer; font: inherit; line-height: 1.2; }
.btn:hover { border-color: #b8bec6; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); }
.btn.danger { color: var(--bad); }
.btn.ghost { background: transparent; }
.btn.small { padding: 3px 8px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: default; }
input, select, textarea { font: inherit; padding: 6px 8px; border: 1px solid #c9ced6; border-radius: 6px; background: #fff; color: var(--text); }
input:focus, select:focus, textarea:focus { outline: 2px solid #9dbdf0; outline-offset: 0; border-color: var(--accent); }
input.num { width: 110px; text-align: right; }
input[type=month] { width: 150px; }
textarea { width: 100%; min-height: 120px; }
label { display: block; font-size: 12px; color: var(--muted); margin: 8px 0 3px; }
label.inline { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); margin: 0; }
table { width: 100%; border-collapse: collapse; background: var(--card); }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; white-space: nowrap; }
th { font-size: 12px; color: var(--muted); font-weight: 600; background: #fafbfc; }
td.r, th.r { text-align: right; font-variant-numeric: tabular-nums; }
td.over { background: var(--over); }
td.under { background: var(--under); }
tr.inactive td { color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; background: #eef0f3; }
.badge.draft { background: #fff3cd; color: #7a4b00; }
.badge.final { background: #dbeafe; color: #1e3a8a; }
.badge.sent { background: #dcfce7; color: #14532d; }
.actions { display: flex; gap: 4px; flex-wrap: wrap; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1d2229; color: #fff;
  padding: 10px 16px; border-radius: 8px; z-index: 50; max-width: 90vw; }
.toast.err { background: var(--bad); }
dialog { border: 1px solid var(--line); border-radius: 10px; padding: 0; max-width: 720px; width: 95vw; }
dialog::backdrop { background: rgba(0,0,0,.35); }
#modal-body { padding: 18px 20px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.note { font-size: 12px; color: var(--muted); }
.kbd { font-family: ui-monospace, Menlo, monospace; font-size: 12px; background: #eef0f3; padding: 2px 5px; border-radius: 4px; }
pre.code { background: #1d2229; color: #e5e7eb; padding: 12px; border-radius: 8px; overflow-x: auto; font-size: 12px; }
.warn-box { background: #fff7e6; border: 1px solid #f5d38a; padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; }
.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-box { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 28px; width: 320px; }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box .btn { width: 100%; }
.small-text { font-size: 12px; }
.tag { font-size: 11px; color: var(--muted); }
@media (max-width: 700px) {
  .top { flex-wrap: wrap; }
  .grid2 { grid-template-columns: 1fr; }
}