:root {
  --bg: #0f1420;
  --panel: #182034;
  --panel-2: #1f2942;
  --line: #2a3550;
  --text: #e7ecf5;
  --muted: #93a0bd;
  --accent: #5b8cff;
  --accent-2: #7c5bff;
  --green: #35c68a;
  --red: #ff6b6b;
  --amber: #ffb547;
  --radius: 14px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #1b2e4a 0, transparent 60%), var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  background: rgba(15,20,32,.7); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 1.05rem; }
.topbar nav { display: flex; gap: 14px; align-items: center; }

.container { max-width: 900px; margin: 0 auto; padding: 26px 20px 60px; }
.narrow { max-width: 440px; margin: 40px auto; }

h1 { font-size: 1.7rem; margin: 0 0 6px; }
h2 { font-size: 1.2rem; }
h2.section { margin: 30px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }

.muted { color: var(--muted); font-size: .92rem; }
.row-between { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }

/* Buttons */
.btn {
  display: inline-block; padding: 9px 16px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text);
  font-size: .92rem; cursor: pointer; font-weight: 600;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: linear-gradient(120deg, var(--accent), var(--accent-2)); border: none; color: white; }
.btn.small { padding: 5px 10px; font-size: .8rem; border-radius: 8px; }
.btn.ok { border-color: var(--green); color: var(--green); }
.btn.danger { border-color: var(--red); color: var(--red); }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; font-size: .92rem; }
.inline { display: inline; }

/* Forms */
form.stack { display: flex; flex-direction: column; gap: 12px; }
label { display: flex; flex-direction: column; gap: 5px; font-size: .85rem; color: var(--muted); font-weight: 600; }
input, select {
  padding: 10px 12px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: .95rem; font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* Cards */
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin: 18px 0;
}
.card.create { margin-top: 26px; }
.card.pending { border-color: var(--amber); }

/* Flash */
.flash { padding: 12px 16px; border-radius: 10px; margin: 14px 0; font-size: .92rem; }
.flash.notice { background: rgba(53,198,138,.12); border: 1px solid var(--green); }
.flash.error { background: rgba(255,107,107,.12); border: 1px solid var(--red); }

/* Hero / landing */
.hero { text-align: center; padding: 40px 0 20px; }
.hero .lead { max-width: 520px; margin: 0 auto 22px; color: var(--muted); }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
.features .card { margin: 0; }
.features h3 { margin-top: 0; }

/* Summary stats */
.summary {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px;
  margin: 18px 0;
}
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.stat.big { grid-column: span 5; background: linear-gradient(120deg, var(--panel-2), var(--panel)); }
.stat-label { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 1.3rem; font-weight: 700; margin-top: 4px; }
.stat.big .stat-value { font-size: 2.4rem; }
.stat-value.positive { color: var(--amber); }
.stat-value.zero { color: var(--green); }
.stat-value .unit { font-size: .8rem; color: var(--muted); font-weight: 500; }

@media (max-width: 720px) {
  .summary { grid-template-columns: repeat(2, 1fr); }
  .stat.big { grid-column: span 2; }
  .features { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
}

/* Share bar */
.share { display: flex; align-items: center; gap: 10px; margin: 6px 0 4px; flex-wrap: wrap; }
.share-url { flex: 1; min-width: 200px; font-size: .85rem; color: var(--muted); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.date { color: var(--muted); white-space: nowrap; }
.num.up { color: var(--red); }
.num.down { color: var(--green); }
.actions { display: flex; gap: 6px; }
.row-interest { background: rgba(124,91,255,.05); }

/* Tags & pills */
.tag { display: inline-block; font-size: .7rem; font-weight: 700; padding: 2px 7px; border-radius: 6px; margin-right: 6px; text-transform: uppercase; }
.tag.debt_added { background: rgba(255,107,107,.15); color: var(--red); }
.tag.payment { background: rgba(53,198,138,.15); color: var(--green); }
.tag.interest { background: rgba(124,91,255,.18); color: #b7a5ff; }
.pill { display: inline-block; font-size: .72rem; font-weight: 700; padding: 2px 9px; border-radius: 999px; text-transform: capitalize; }
.pill.owner { background: rgba(91,140,255,.18); color: var(--accent); }
.pill.viewer { background: rgba(147,160,189,.18); color: var(--muted); }
.pill.debtor { background: rgba(255,181,71,.18); color: var(--amber); }
.pill.pending { background: rgba(255,181,71,.18); color: var(--amber); }

.tracker-list { list-style: none; padding: 0; }
.tracker-list li { padding: 12px 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center; }

.foot { text-align: center; padding: 20px; font-size: .8rem; border-top: 1px solid var(--line); }