:root {
  --ink: #16323b;
  --ink-soft: #2c4a54;
  --paper: #faf7f0;
  --paper-panel: #ffffff;
  --line: #e4ddc9;
  --gold: #b8863a;
  --green: #2f7d4f;
  --amber: #b8863a;
  --red: #b3422e;
  --text: #22302f;
  --text-soft: #6b7570;
  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--text);
}

.app-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--ink);
  color: #eee8d8;
  display: flex;
  flex-direction: column;
  padding: 28px 20px;
}
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 40px; }
.brand-mark {
  font-family: var(--font-display);
  font-size: 22px;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gold);
  color: var(--ink);
  border-radius: 8px;
}
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: 16px; letter-spacing: 0.02em; }

.nav-links { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-links a {
  color: #cdd9d6;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-links a.active { background: rgba(184,134,58,0.18); color: #f2d9a8; }

.logout-link {
  color: #97a6a2;
  text-decoration: none;
  font-size: 13px;
  padding: 10px 12px;
}
.logout-link:hover { color: #eee; }

/* Content */
.content { flex: 1; padding: 36px 44px; max-width: 1180px; }

.page-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 28px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-soft);
  margin: 0 0 4px;
}
h1 { font-family: var(--font-display); font-size: 30px; margin: 0; font-weight: 600; }
h2 { font-family: var(--font-display); font-size: 18px; margin: 0 0 14px; font-weight: 600; }

/* KPI cards */
.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 32px; }
.kpi-card {
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 8px;
}
.kpi-balance { border-color: var(--gold); border-width: 1.5px; }
.kpi-label { font-size: 12px; color: var(--text-soft); font-weight: 500; }
.kpi-value { font-family: var(--font-mono); font-size: 22px; font-weight: 500; }
.kpi-in { color: var(--green); }
.kpi-out { color: var(--red); }
.unit-pill-row { display: flex; gap: 6px; flex-wrap: wrap; }
.pill { font-size: 11px; font-family: var(--font-mono); padding: 3px 8px; border-radius: 20px; }
.pill-paid { background: #e3f0e6; color: var(--green); }
.pill-partial { background: #f5ead2; color: var(--amber); }
.pill-unpaid { background: #f4dfda; color: var(--red); }

/* Panels + tables */
.panel {
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 24px;
}
.panel-sub { font-size: 13px; color: var(--text-soft); margin: -8px 0 16px; }

.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.data-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  font-weight: 600;
  padding: 8px 10px;
  border-bottom: 1.5px solid var(--line);
}
.data-table td { padding: 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.num { text-align: right; font-family: var(--font-mono); }
.amt-in { color: var(--green); }
.amt-out { color: var(--red); }
.ref-cell { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.empty-state { text-align: center; color: var(--text-soft); padding: 24px; }

.unit-code { font-family: var(--font-mono); font-weight: 600; background: #f1ede0; padding: 2px 7px; border-radius: 5px; }
.unit-note { margin-left: 4px; color: var(--gold); cursor: help; }

.status-badge { font-size: 11.5px; font-weight: 600; padding: 3px 10px; border-radius: 20px; }
.status-paid { background: #e3f0e6; color: var(--green); }
.status-partial { background: #f5ead2; color: var(--amber); }
.status-unpaid { background: #f4dfda; color: var(--red); }

/* Settings */
.kv-list { display: flex; flex-direction: column; gap: 8px; }
.kv-row { display: flex; gap: 12px; align-items: center; font-size: 13.5px; }
.kv-key { color: var(--text-soft); width: 130px; flex-shrink: 0; }
.kv-row code {
  font-family: var(--font-mono);
  background: #f1ede0;
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 12.5px;
  word-break: break-all;
}

.inline-form { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.inline-form label, .data-table label { display: flex; flex-direction: column; font-size: 12px; color: var(--text-soft); gap: 4px; }
.inline-form input, .data-table input[type=text], .data-table input[type=number] {
  font-family: var(--font-body);
  font-size: 13.5px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  min-width: 130px;
}
.data-table input[type=text], .data-table input[type=number] { min-width: 90px; width: 100%; }

button {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13.5px;
  padding: 9px 16px;
  border-radius: 8px;
  border: none;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  transition: background 0.15s;
}
button:hover { background: var(--ink-soft); }
.btn-small { padding: 6px 12px; font-size: 12.5px; }
.btn-danger { background: transparent; color: var(--red); border: 1px solid var(--red); }
.btn-danger:hover { background: #fbecea; }
.row-actions { display: flex; gap: 6px; }

/* Flash messages */
.flash-stack { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.flash { padding: 10px 14px; border-radius: 8px; font-size: 13.5px; }
.flash-success { background: #e3f0e6; color: var(--green); }
.flash-error { background: #f4dfda; color: var(--red); }

/* Login */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: var(--ink);
}
.login-card {
  background: var(--paper-panel);
  border-radius: 14px;
  padding: 36px 32px;
  width: 320px;
  display: flex; flex-direction: column; gap: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-brand { margin-bottom: 8px; color: var(--ink); }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-soft); }
.login-card input {
  font-family: var(--font-body); font-size: 14px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px;
}
.login-card button { margin-top: 6px; }

@media (max-width: 900px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; padding: 16px 20px; }
  .nav-links { flex-direction: row; }
  .content { padding: 20px; }
}