:root {
  --navy: #1b2a4a;
  --navy-deep: #14213a;
  --gold: #c9a648;
  --gold-soft: #f3ead2;
  --ink: #22304a;
  --muted: #6b7689;
  --line: #e3e7ee;
  --bg: #f6f7f9;
  --card: #ffffff;
  --green: #1e7d4f; --green-bg: #e4f3ea;
  --amber: #9a6b00; --amber-bg: #fdf2d4;
  --red: #b3261f; --red-bg: #fbe6e6;
  --gray: #5a6472; --gray-bg: #edf0f4;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(20, 33, 58, .08), 0 8px 24px rgba(20, 33, 58, .06);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink); background: var(--bg);
}
.hidden { display: none !important; }
a { color: var(--navy); }

/* ---------- login ---------- */
.login { min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(1200px 700px at 70% -10%, #2c3f66 0%, var(--navy-deep) 55%); }
.login-card { background: var(--card); border-radius: 16px; box-shadow: var(--shadow);
  padding: 48px 56px; text-align: center; max-width: 380px; }
.login-mark { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 16px; background: var(--navy);
  color: var(--gold); font: 700 34px/64px Georgia, serif; }
.login h1 { margin: 0 0 4px; font-size: 24px; color: var(--navy); }
.login-sub { margin: 0 0 28px; color: var(--muted); }
.login-note { margin-top: 24px; font-size: 12.5px; color: var(--muted); }
.login-error { margin-top: 18px; color: #b3261f; background: var(--red-bg); border-radius: 8px; padding: 10px 12px; font-size: 13.5px; }

/* ---------- layout ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 230px; flex: 0 0 230px; background: var(--navy-deep); color: #cfd6e4;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 10px; padding: 20px 18px 14px; color: #fff;
  font-weight: 650; font-size: 16.5px; letter-spacing: .2px; }
.brand-mark { width: 30px; height: 30px; border-radius: 8px; background: var(--navy); color: var(--gold);
  font: 700 17px/30px Georgia, serif; text-align: center; }
#nav { flex: 1; padding: 8px 10px; }
.nav-admin { padding: 6px 10px 4px; margin-top: 4px; border-top: 1px solid rgba(255,255,255,.12); }
#nav a, .nav-admin a { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 9px 12px;
  margin: 2px 0; border-radius: 8px; color: #cfd6e4; text-decoration: none; font-size: 14.5px; }
#nav a:hover, .nav-admin a:hover { background: rgba(255,255,255,.07); color: #fff; }
#nav a.active, .nav-admin a.active { background: var(--gold); color: var(--navy-deep); font-weight: 600; }
#nav .badge { background: #b3261f; color: #fff; border-radius: 99px; font-size: 11.5px; padding: 1px 7px; }
#nav a.active .badge { background: var(--navy-deep); color: #fff; }
.sidebar-foot { padding: 14px 18px; border-top: 1px solid rgba(255,255,255,.12); font-size: 13px; }
.whoami { color: #fff; margin-bottom: 2px; }
.whoami small { display: block; color: #8d99b3; }
.link-quiet { color: #8d99b3; text-decoration: none; }
.link-quiet:hover { color: #fff; }

.main { flex: 1; padding: 28px 34px 60px; max-width: 1200px; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.page-head h2 { margin: 0; font-size: 21px; color: var(--navy); }
.page-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- cards & stats ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.stat .label { font-size: 12.5px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); }
.stat .value { font-size: 26px; font-weight: 700; color: var(--navy); margin-top: 2px; }
.stat .sub { font-size: 12.5px; color: var(--muted); }
.stat.alert .value { color: #b3261f; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 22px; overflow: hidden; }
.card-head { padding: 14px 18px; border-bottom: 1px solid var(--line); font-weight: 650; color: var(--navy);
  display: flex; justify-content: space-between; align-items: center; }
.card-body { padding: 16px 18px; }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted);
  padding: 10px 14px; border-bottom: 1px solid var(--line); background: #fafbfc; white-space: nowrap; }
td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr.clickable { cursor: pointer; }
tr.clickable:hover { background: #f6f8fb; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tsub { color: var(--muted); font-size: 12.5px; }

/* ---------- pills & flags ---------- */
.pill { display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: 12px; font-weight: 600; }
.pill.paid { background: var(--green-bg); color: var(--green); }
.pill.partial { background: var(--amber-bg); color: var(--amber); }
.pill.unpaid { background: var(--gray-bg); color: var(--gray); }
.pill.late { background: var(--red-bg); color: #b3261f; }
.pill.active { background: var(--green-bg); color: var(--green); }
.pill.pending { background: var(--amber-bg); color: var(--amber); }
.pill.former { background: var(--gray-bg); color: var(--gray); }
.flag { display: inline-block; margin-left: 6px; color: #b3261f; font-size: 12px; font-weight: 700; cursor: help; }

/* ---------- buttons & forms ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink); padding: 8px 14px; font-size: 14px; font-weight: 550; cursor: pointer;
  text-decoration: none; }
.btn:hover { border-color: #c6cdd8; background: #fafbfc; }
.btn-primary { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-deep); border-color: var(--navy-deep); }
.btn-gold { background: var(--gold); border-color: var(--gold); color: var(--navy-deep); }
.btn-gold:hover { filter: brightness(.96); }
.btn-danger { color: #b3261f; }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-lg { padding: 12px 22px; font-size: 15.5px; }
.btn[disabled] { opacity: .5; cursor: default; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin: 12px 0 4px; }
input, select, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; color: var(--ink); background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(27,42,74,.25); border-color: var(--navy); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0 16px; }

.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.filters select, .filters input { width: auto; min-width: 140px; }

/* ---------- modal ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(16, 24, 40, .5); display: flex;
  align-items: flex-start; justify-content: center; padding: 6vh 16px; z-index: 50; overflow-y: auto; }
.modal { background: #fff; border-radius: 14px; box-shadow: var(--shadow); width: 100%; max-width: 560px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px;
  border-bottom: 1px solid var(--line); font-weight: 650; color: var(--navy); font-size: 16px; }
.modal-close { border: none; background: none; font-size: 22px; color: var(--muted); cursor: pointer; }
.modal-body { padding: 6px 20px 20px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px; border-top: 1px solid var(--line); }

/* ---------- misc ---------- */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--navy-deep);
  color: #fff; padding: 10px 20px; border-radius: 10px; box-shadow: var(--shadow); z-index: 99; font-size: 14px; }
.toast.error { background: #b3261f; }
.empty { padding: 36px; text-align: center; color: var(--muted); }
.review-note { background: var(--gold-soft); border-left: 3px solid var(--gold); border-radius: 6px;
  padding: 8px 12px; margin-top: 6px; font-size: 13px; }
.mono { font-variant-numeric: tabular-nums; }
@media (max-width: 860px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; flex: none; height: auto; position: static; }
  #nav { display: flex; flex-wrap: wrap; }
  .main { padding: 18px; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
}