:root {
  --bg: #f6f7f9;
  --surface: #fff;
  --text: #1c2430;
  --muted: #667085;
  --border: #e3e6eb;
  --accent: #2f5bea;
  --accent-dark: #2448bd;
  --danger: #c4321c;
  --ok: #16794a;
  --warn: #a15c07;
  --radius: 8px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; margin: 0; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.pre { white-space: pre-line; }

/* Layout */
.topbar { background: #151b26; color: #fff; }
.topbar .inner { max-width: 1180px; margin: 0 auto; padding: .7rem 1rem; display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
.brand { color: #fff; font-weight: 700; font-size: 1.1rem; }
.topbar nav { display: flex; gap: 1rem; flex: 1; flex-wrap: wrap; }
.topbar nav a, .topbar .user a, .topbar .user button { color: #c9d1de; }
.topbar nav a.active, .topbar nav a:hover { color: #fff; text-decoration: none; }
.topbar .user { display: flex; gap: .75rem; align-items: center; color: #8b95a5; font-size: .9rem; }
.topbar .user button { background: none; border: 0; cursor: pointer; font: inherit; padding: 0; }
main { max-width: 1180px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.actions form { margin: 0; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.25rem; }
.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid .card { margin-bottom: 0; }
.two-col { display: grid; gap: 1.25rem; grid-template-columns: 2fr 1fr; align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

.stat .label { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 1.6rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.stat .value.danger { color: var(--danger); }

/* Buttons */
.btn { display: inline-block; padding: .5rem .9rem; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-size: .92rem; cursor: pointer; line-height: 1.2; }
.btn:hover { text-decoration: none; border-color: #c5cad3; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.danger { color: var(--danger); }
.btn.link { border: 0; background: none; color: var(--danger); padding: 0; font-size: .85rem; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .55rem .6rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
tfoot td { font-weight: 600; }
.empty { color: var(--muted); padding: 1.5rem; text-align: center; }

/* Status badges */
.badge { display: inline-block; padding: .1rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 600; background: #eef0f3; color: #475467; }
.badge.sent { background: #e6edff; color: #2448bd; }
.badge.partial { background: #fff4e0; color: var(--warn); }
.badge.paid { background: #e3f6ec; color: var(--ok); }
.badge.overdue { background: #fde8e4; color: var(--danger); }

/* Forms */
.form-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.field { display: flex; flex-direction: column; gap: .3rem; }
.field.wide { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .88rem; }
.field .help { color: var(--muted); font-size: .8rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=search], select, textarea {
  width: 100%; padding: .5rem .6rem; border: 1px solid #cfd4dc; border-radius: 6px; font: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid #b8c8fb; border-color: var(--accent); }
.errorlist { color: var(--danger); margin: 0; padding: 0; list-style: none; font-size: .85rem; }
.form-errors { background: #fde8e4; color: var(--danger); padding: .7rem 1rem; border-radius: 6px; margin-bottom: 1rem; }
.filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.filters input, .filters select { width: auto; min-width: 150px; }

.lines td { padding: .35rem; }
.lines input { min-width: 70px; }
.lines td.desc input { min-width: 220px; }
.lines .line-total { padding-top: .8rem; }
.lines tr.removed { opacity: .4; }

/* Messages */
.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li { padding: .65rem 1rem; border-radius: 6px; margin-bottom: .5rem; background: #e6edff; }
.messages li.success { background: #e3f6ec; color: var(--ok); }
.messages li.error { background: #fde8e4; color: var(--danger); }

/* Revenue bars */
.bars { display: grid; grid-template-columns: repeat(12, 1fr); gap: .35rem; align-items: end; height: 150px; margin-top: .5rem; }
.bar { display: flex; flex-direction: column; justify-content: flex-end; height: 100%; }
.bar span { display: block; background: var(--accent); border-radius: 3px 3px 0 0; min-height: 2px; }
.bar-labels { display: grid; grid-template-columns: repeat(12, 1fr); gap: .35rem; font-size: .72rem; color: var(--muted); text-align: center; margin-top: .3rem; }

.auth { max-width: 380px; margin: 3rem auto; }
dl.meta { display: grid; grid-template-columns: auto 1fr; gap: .3rem 1rem; margin: 0; }
dl.meta dt { color: var(--muted); }
dl.meta dd { margin: 0; }
.logo-preview { max-height: 60px; display: block; margin-bottom: .5rem; }