:root {
  --bg: #f5f6f8; --panel: #fff; --text: #1d2229; --muted: #6b7380; --line: #dde1e6;
  --accent: #1f5fbf; --accent-bg: #e8f0fc; --ok: #1a7f37; --ok-bg: #e6f4ea; --err: #b42318; --err-bg: #fdecea;
  --neg: #b42318; --warn-bg: #fff4e5;
}
* { box-sizing: border-box; }
html { font-size: 15px; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; line-height: 1.4; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header.top { background: #1d2229; color: #fff; padding: .4rem 1rem; display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.25rem; min-height: 48px; }
header.top nav { display: flex; flex-wrap: wrap; gap: .25rem; }
header.top .brand { font-weight: 700; letter-spacing: .02em; color: #fff; }
header.top nav a { color: #cfd6e0; padding: .35rem .5rem; border-radius: 4px; }
header.top nav a.active, header.top nav a:hover { color: #fff; background: #2f3640; text-decoration: none; }
header.top .right { margin-left: auto; display: flex; align-items: center; gap: .6rem; }
header.top .who { color: #cfd6e0; padding: .35rem .5rem; border-radius: 4px; }
header.top .who.active, header.top .who:hover { color: #fff; background: #2f3640; text-decoration: none; }
header.top button { background: none; border: 1px solid #555; color: #cfd6e0; border-radius: 4px; padding: .25rem .6rem; cursor: pointer; }
main { max-width: 1280px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.4rem; margin: .25rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.25rem 0 .5rem; }
.flash { padding: .6rem .9rem; border-radius: 6px; margin-bottom: 1rem; }
.flash.ok { background: var(--ok-bg); color: var(--ok); }
.flash.err { background: var(--err-bg); color: var(--err); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 1rem; margin-bottom: 1rem; }
.grid { display: grid; gap: 1rem; }
.grid.cols-2 { grid-template-columns: 2fr 1fr; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; } }
table { width: 100%; border-collapse: collapse; background: var(--panel); }
th, td { padding: .4rem .55rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #eef0f3; font-weight: 600; white-space: nowrap; position: sticky; top: 0; z-index: 1; }
td.r, th.r { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.c, th.c { text-align: center; }
tr.total td { font-weight: 700; background: #f3f5f8; }
tr.hl td { background: #fff8d6; }
tr.settled td.charge { color: var(--muted); }
.neg { color: var(--neg); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.nowrap { white-space: nowrap; }
.badge { display: inline-block; font-size: .72rem; padding: .05rem .4rem; border-radius: 10px; background: #e5e8ec; color: #444; vertical-align: middle; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.credit { background: var(--warn-bg); color: #8a4b00; }
.badge.payment { background: var(--accent-bg); color: var(--accent); }
form.inline { display: inline; }
label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .15rem; }
input[type=text], input[type=date], input[type=number], input[type=password], input[type=email], select, textarea {
  width: 100%; padding: .4rem .5rem; border: 1px solid #b9c0c9; border-radius: 5px; font: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-bg); border-color: var(--accent); }
input.money { text-align: right; font-variant-numeric: tabular-nums; }
textarea { min-height: 4rem; }
.field { margin-bottom: .75rem; }
.row { display: flex; gap: .75rem; flex-wrap: wrap; align-items: flex-end; }
.row > .field { flex: 1 1 120px; margin-bottom: .75rem; }
.row > .field.w-2 { flex: 2 1 260px; }
.row > .field.w-s { flex: 0 1 110px; }
.check { display: flex; align-items: center; gap: .4rem; font-size: .95rem; color: var(--text); }
.check input { width: auto; }
.btn { display: inline-block; padding: .45rem .9rem; border-radius: 5px; border: 1px solid #b9c0c9; background: #fff; color: var(--text); font: inherit; cursor: pointer; white-space: nowrap; }
.btn:hover { background: #f0f2f5; text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: #184c99; }
.btn.danger { color: var(--err); border-color: #e0a9a3; }
.btn.sm { padding: .2rem .5rem; font-size: .82rem; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin: .75rem 0; }
.letters { display: flex; flex-wrap: wrap; gap: .2rem; margin: .5rem 0; }
.letters a { padding: .15rem .45rem; border: 1px solid var(--line); border-radius: 4px; background: #fff; font-size: .85rem; }
.letters a.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.kpi { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi.neg { color: var(--neg); }
.head { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: baseline; }
.head .meta { color: var(--muted); }
.login { max-width: 360px; margin: 10vh auto; }
.errors { background: var(--err-bg); color: var(--err); padding: .6rem .9rem; border-radius: 6px; margin-bottom: 1rem; }
.errors ul { margin: 0; padding-left: 1.2rem; }
.scroll { overflow-x: auto; }
dl.props { display: grid; grid-template-columns: max-content 1fr; gap: .2rem .8rem; margin: 0; }
dl.props dt { color: var(--muted); }
dl.props dd { margin: 0; }
.z-box { background: var(--accent-bg); border-radius: 6px; padding: .6rem .8rem; }
footer { color: var(--muted); font-size: .8rem; text-align: center; padding: 1rem; }
@media print { header.top, .actions, .letters, .no-print { display: none !important; } main { max-width: none; } }