/* LedgerBridge — ledger-register design system */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Serif:wght@600&display=swap');

:root {
  --ink: #1c2733;          /* deep ledger ink */
  --paper: #f7f6f2;        /* off-white register paper */
  --card: #ffffff;
  --rule: #e3e0d8;         /* ruled line */
  --rule-strong: #c9c4b6;
  --dr: #a8432c;           /* debit rust */
  --cr: #1f6f54;           /* credit register green */
  --accent: #1f4f6f;       /* header band blue-ink */
  --muted: #6d7682;
  --chip: #eef3ee;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  background: var(--paper); color: var(--ink); font-size: 15px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* layout */
.shell { display: flex; min-height: 100vh; }
.side {
  width: 210px; flex-shrink: 0; background: var(--ink); color: #d9dde3;
  padding: 18px 0; position: sticky; top: 0; height: 100vh;
}
.brand {
  font-family: 'IBM Plex Serif', serif; font-weight: 600; font-size: 20px;
  color: #fff; padding: 4px 20px 16px; letter-spacing: .3px;
  border-bottom: 1px solid #303c4a; margin-bottom: 10px;
}
.brand span { color: #8fb7d1; }
.side a.nav {
  display: block; padding: 9px 20px; color: #c2c9d2; font-size: 14px;
}
.side a.nav:hover { background: #28384a; color: #fff; text-decoration: none; }
.side a.nav.on { background: var(--accent); color: #fff;
  border-left: 3px solid #8fb7d1; padding-left: 17px; }
.side .foot { position: absolute; bottom: 14px; left: 20px;
  font-size: 12px; color: #74808e; }

.main { flex: 1; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 26px; background: var(--card);
  border-bottom: 2px solid var(--rule-strong);
}
.topbar h1 { font-size: 17px; margin: 0; font-weight: 600; flex: 1; }
.co { font-size: 13px; color: var(--muted); }
.chip {
  background: var(--chip); color: var(--cr); border: 1px solid #cfe0d5;
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  font-family: 'IBM Plex Mono', monospace;
}
.content { padding: 22px 26px; }

/* cards & KPIs */
.cards { display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--rule);
  border-top: 3px solid var(--accent); padding: 14px 16px;
}
.card .lbl { font-size: 12px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .6px; }
.card .val { font-family: 'IBM Plex Mono', monospace; font-size: 21px;
  font-weight: 500; margin-top: 5px; }
.card.dr { border-top-color: var(--dr); }
.card.cr { border-top-color: var(--cr); }

/* ledger-ruled tables — the signature */
table.ledger {
  width: 100%; border-collapse: collapse; background: var(--card);
  border: 1px solid var(--rule-strong); margin-top: 14px;
}
table.ledger th {
  text-align: left; font-size: 12px; text-transform: uppercase;
  letter-spacing: .5px; color: #f2f4f6; background: var(--accent);
  padding: 8px 10px; font-weight: 500;
}
table.ledger td {
  padding: 7px 10px; border-bottom: 1px solid var(--rule); font-size: 14px;
  vertical-align: top;
}
table.ledger tr:nth-child(even) td { background: #fbfaf7; }
table.ledger tr:hover td { background: #f1efe7; }
td.amt, th.amt { text-align: right;
  font-family: 'IBM Plex Mono', monospace; font-variant-numeric: tabular-nums;
  white-space: nowrap; }
.dr-amt { color: var(--dr); }
.cr-amt { color: var(--cr); }
.sub { color: var(--muted); font-size: 12.5px; }
td.total, tr.total td { border-top: 2px solid var(--rule-strong);
  font-weight: 600; background: #f4f2ea !important; }

/* bars */
.bars { display: flex; align-items: flex-end; gap: 10px; height: 150px;
  padding: 14px 6px 4px; }
.bargrp { flex: 1; display: flex; gap: 3px; align-items: flex-end;
  height: 100%; position: relative; }
.bar { flex: 1; min-width: 8px; border-radius: 2px 2px 0 0; }
.bar.inc { background: var(--cr); }
.bar.exp { background: var(--dr); opacity: .85; }
.bartag { position: absolute; bottom: -20px; left: 0; right: 0;
  text-align: center; font-size: 11px; color: var(--muted);
  font-family: 'IBM Plex Mono', monospace; }
.legend { font-size: 12px; color: var(--muted); margin-top: 28px; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 2px;
  margin: 0 4px 0 12px; }

/* forms */
form.filters { display: flex; gap: 10px; flex-wrap: wrap;
  align-items: end; margin-top: 4px; }
form.filters label { font-size: 12px; color: var(--muted);
  display: block; margin-bottom: 3px; }
input, select {
  font: inherit; padding: 7px 9px; border: 1px solid var(--rule-strong);
  background: #fff; color: var(--ink);
}
button {
  font: inherit; background: var(--accent); color: #fff; border: 0;
  padding: 8px 16px; cursor: pointer; font-weight: 500;
}
button:hover { background: #173d57; }

/* login */
.loginwrap { min-height: 100vh; display: grid; place-items: center;
  background: var(--ink); }
.loginbox { background: var(--card); padding: 34px 36px; width: 340px;
  border-top: 4px solid var(--accent); }
.loginbox h1 { font-family: 'IBM Plex Serif', serif; margin: 0 0 4px; }
.loginbox .sub { margin-bottom: 18px; }
.loginbox input { width: 100%; margin-bottom: 12px; }
.loginbox button { width: 100%; }
.err { background: #f7e8e4; color: var(--dr); padding: 8px 10px;
  font-size: 13px; margin-bottom: 12px; border: 1px solid #e4c4ba; }

@media (max-width: 760px) {
  .shell { flex-direction: column; }
  .side { width: 100%; height: auto; position: static; display: flex;
    flex-wrap: wrap; align-items: center; padding: 8px; }
  .brand { border: 0; padding: 6px 12px; margin: 0; }
  .side a.nav { padding: 8px 12px; }
  .side .foot { display: none; }
  .content { padding: 14px; }
}