:root {
  --bg: #f6f5f3; --surface: #ffffff; --ink: #1d1b1a; --muted: #6b6662; --line: #e5e1dc;
  --brand: #c2185b; --owed: #b4372a; --owed-bg: #fbebe8; --credit: #1f7a4d; --credit-bg: #e6f4ec; --even: #6b6662; --even-bg: #efedea;
  --s1: #c2185b; --s2: #7a5af5; --s3: #0f8b8d; --s4: #d07a12;
  --radius: 14px; --shadow: 0 1px 2px rgba(0,0,0,.05), 0 4px 16px rgba(0,0,0,.04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312; --surface: #1d1c1a; --ink: #f0ede9; --muted: #a39d97; --line: #2f2d2a;
    --brand: #f06292; --owed: #f08a7c; --owed-bg: #3a201c; --credit: #6fd3a0; --credit-bg: #183026; --even: #a39d97; --even-bg: #262422;
    --s1: #f06292; --s2: #a28bff; --s3: #3cc6c8; --s4: #f0a94a; --shadow: none;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-x: hidden; background: var(--bg); color: var(--ink); font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--line); background: var(--surface); }
.brand { display: flex; gap: 10px; align-items: center; font-weight: 650; }
.mark { width: 22px; height: 22px; border-radius: 6px; background: var(--brand); }
.top-right { display: flex; gap: 14px; align-items: center; font-size: 13px; }
.muted { color: var(--muted); } .small { font-size: 12.5px; }
button { font: inherit; cursor: pointer; }
.link { background: none; border: 0; color: var(--brand); padding: 0; }
.primary { background: var(--brand); color: #fff; border: 0; border-radius: 10px; padding: 11px 16px; font-weight: 600; width: 100%; margin-top: 12px; }
.primary:disabled { opacity: .6; cursor: default; }

.login { display: grid; place-items: center; min-height: calc(100vh - 60px); padding: 16px; }
.login-card { width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); }
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.login-card label { display: block; font-size: 13px; color: var(--muted); margin-top: 16px; }
.login-card input { width: 100%; font: inherit; font-size: 17px; padding: 11px 12px; margin-top: 6px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); }
#code { letter-spacing: .3em; font-variant-numeric: tabular-nums; }
#restart { margin-top: 12px; font-size: 13px; }
.msg { min-height: 1.4em; font-size: 13.5px; margin: 14px 0 0; }
.msg.err { color: var(--owed); }

.app { max-width: 1080px; margin: 0 auto; padding: 20px 16px 48px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.app > * { min-width: 0; }
.rollup { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.rollup > div { background: var(--surface); padding: 14px 16px; display: grid; gap: 2px; }
.label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.rollup strong { font-size: 20px; font-variant-numeric: tabular-nums; }

.cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.card { text-align: left; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); display: grid; gap: 6px; color: inherit; border-left: 5px solid var(--even); }
.card:hover { border-color: var(--muted); }
.card[aria-pressed="true"] { outline: 2px solid var(--brand); outline-offset: 1px; }
.card.owed { border-left-color: var(--owed); } .card.credit { border-left-color: var(--credit); }
.card .name { font-weight: 650; display: flex; justify-content: space-between; align-items: center; gap: 6px; }
.card .amount { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.card.owed .amount { color: var(--owed); } .card.credit .amount { color: var(--credit); }
.pill { font-size: 11.5px; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--even-bg); color: var(--even); }
.owed .pill.state { background: var(--owed-bg); color: var(--owed); } .credit .pill.state { background: var(--credit-bg); color: var(--credit); }
.card .who { font-size: 12.5px; color: var(--muted); }
.card .delta { font-size: 12.5px; color: var(--muted); }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.panel h2 { font-size: 16px; margin: 0; }
.chart svg { width: 100%; height: auto; display: block; }
.chart text { fill: var(--muted); font-size: 11px; }
.chart .grid { stroke: var(--line); }
.chart .zero { stroke: var(--muted); stroke-dasharray: 3 3; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.legend button { background: none; border: 0; color: inherit; display: inline-flex; gap: 6px; align-items: center; padding: 2px 0; }
.legend i { width: 12px; height: 3px; border-radius: 2px; display: inline-block; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 9px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; white-space: nowrap; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.num { text-align: right; }
td .sub { display: block; font-size: 11.5px; color: var(--muted); }
td.owed { color: var(--owed); font-weight: 600; } td.credit { color: var(--credit); font-weight: 600; }
.tag { font-size: 11px; padding: 1px 6px; border-radius: 99px; background: var(--even-bg); color: var(--muted); margin-left: 6px; }

@media (max-width: 820px) {
  .cards, .rollup { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .cards { grid-template-columns: minmax(0, 1fr); }
  .top { padding: 12px 16px; }
  #asof { display: none; }
  .rollup strong { font-size: 17px; }
  .panel { padding: 14px 12px; }
}

.chart .line { fill: none; stroke-width: 2.75; stroke-linejoin: round; stroke-linecap: round; }
.chart .line.dim { stroke-width: 1.5; stroke-opacity: .22; }
.s0 { stroke: var(--s1); fill: var(--s1); } .s1 { stroke: var(--s2); fill: var(--s2); } .s2 { stroke: var(--s3); fill: var(--s3); } .s3 { stroke: var(--s4); fill: var(--s4); }
.chart .line.s0, .chart .line.s1, .chart .line.s2, .chart .line.s3 { fill: none; }
.legend i.s0 { background: var(--s1); } .legend i.s1 { background: var(--s2); } .legend i.s2 { background: var(--s3); } .legend i.s3 { background: var(--s4); }

.pay { display: inline-block; margin-top: 6px; padding: 7px 12px; border-radius: 9px; background: var(--brand); color: #fff; font-weight: 600; font-size: 13.5px; text-decoration: none; justify-self: start; }
.pay.big { font-size: 15px; padding: 9px 16px; }
.pay.alt { background: none; color: var(--brand); border: 1px solid var(--brand); }
.paynow { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 4px 0 12px; }