:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --panel2: #f0f2f5;
  --line: #dde1e7;
  --text: #1a1a2e;
  --muted: #6b7280;
  --accent: #2563eb;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-size: 18px; font-weight: 700; white-space: nowrap; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab {
  background: transparent; color: var(--muted);
  border: none; padding: 8px 14px; border-radius: 8px;
  cursor: pointer; font-size: 14px;
}
.tab:hover { background: var(--panel2); color: var(--text); }
.tab.active { background: var(--accent); color: #fff; }

.kpis {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px; padding: 16px 20px;
}
.kpi {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px;
}
.kpi .label { color: var(--muted); font-size: 12px; }
.kpi .value { font-size: 22px; font-weight: 700; margin-top: 4px; }
.kpi.net .value { color: var(--accent); }
.pos { color: var(--green); }
.neg { color: var(--red); }

main { padding: 0 20px 40px; }
.panel { display: none; }
.panel.active { display: block; }
.grid2 { display: grid; grid-template-columns: 1.3fr 1fr; gap: 16px; }
@media (max-width: 900px) { .grid2 { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px; margin-bottom: 16px;
}
.card h3 { margin: 0 0 12px; font-size: 15px; display: flex; align-items: center; gap: 10px; }
.inline { margin-left: auto; }

.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.form-grid label.wide { grid-column: 1 / -1; }
.form-actions { grid-column: 1 / -1; display: flex; align-items: center; gap: 12px; justify-content: flex-end; }
input, select {
  background: var(--panel2); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; width: 100%;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
button {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 9px 16px; cursor: pointer; font-size: 14px; font-weight: 600;
}
button:hover { filter: brightness(1.1); }
button.secondary { background: var(--panel2); border: 1px solid var(--line); color: var(--text); }
button.mini { padding: 4px 9px; font-size: 12px; font-weight: 500; }
button.danger { background: transparent; color: var(--red); border: 1px solid var(--red); }
.hint { color: var(--muted); font-size: 12px; }

.filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.filters label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.filters input, .filters select { width: auto; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: right; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child, .tl { text-align: left; }
th { color: var(--muted); font-weight: 600; font-size: 12px; }
tbody tr:hover { background: var(--panel2); }
tr.current-month { background: rgba(59,130,246,.13); font-weight: 600; }
tr.current-month:hover { background: rgba(59,130,246,.2); }
.num { font-variant-numeric: tabular-nums; }

.badge { padding: 2px 8px; border-radius: 999px; font-size: 11px; }
.badge.in { background: rgba(34,197,94,.15); color: var(--green); }
.badge.out { background: rgba(239,68,68,.15); color: var(--red); }
.badge.scheduled { background: rgba(245,158,11,.15); color: var(--amber); }
.badge.auto { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.settled { background: rgba(139,155,176,.15); color: var(--muted); }
.badge.active { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.repaid, .badge.closed { background: rgba(139,155,176,.15); color: var(--muted); }

.reminders { display: flex; flex-direction: column; gap: 8px; max-height: 320px; overflow-y: auto; }
.rem {
  display: flex; justify-content: space-between; gap: 8px; align-items: center;
  padding: 8px 10px; background: var(--panel2); border-radius: 8px; border-left: 3px solid var(--amber);
}
.rem.overdue { border-left-color: var(--red); }
.rem .r-main { display: flex; flex-direction: column; }
.rem .r-sub { color: var(--muted); font-size: 12px; }
.rem .r-amt { font-weight: 700; font-variant-numeric: tabular-nums; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--panel2); border: 1px solid var(--line); color: var(--text);
  padding: 10px 18px; border-radius: 10px; opacity: 0; pointer-events: none;
  transition: all .25s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.empty { color: var(--muted); padding: 16px; text-align: center; }

/* modal */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 50; padding: 24px; }
.modal.show { display: flex; align-items: flex-start; justify-content: center; }
.modal-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  width: min(920px, 100%); max-height: 90vh; overflow-y: auto; padding: 20px; margin-top: 4vh;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.modal-head h2 { margin: 0; font-size: 17px; }
.detail-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px 18px; padding: 12px 14px; background: var(--panel2); border-radius: 10px; margin-bottom: 12px; }
.detail-meta .dk { color: var(--muted); font-size: 12px; display: block; }
.detail-meta .dv { font-weight: 600; }
.detail-sum { padding: 10px 14px; background: rgba(59,130,246,.1); border-radius: 10px; margin-bottom: 14px; font-size: 13px; }
.detail-sum b { color: var(--accent); }
.modal input, .modal select { padding: 5px 7px; font-size: 13px; }

.login-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center; z-index: 9999;
}
.login-box {
  background: var(--panel); border-radius: 14px; padding: 36px 40px;
  width: min(360px, 90vw); box-shadow: 0 8px 32px rgba(0,0,0,.18);
  text-align: center;
}
.login-box h2 { margin: 0 0 24px; font-size: 20px; }
#loginForm { display: flex; gap: 10px; }
#loginPwd { flex: 1; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 15px; background: var(--bg); color: var(--text); }
#loginForm button { padding: 9px 18px; background: var(--accent); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; }
.login-err { color: var(--red); margin: 10px 0 0; font-size: 13px; min-height: 18px; }