:root {
  --bg: #f5f7fa;
  --sidebar-bg: #10241f;
  --accent: #1f9d7c;
  --accent-dark: #157c62;
  --text: #1a2b28;
  --muted: #6b7b78;
  --card-bg: #ffffff;
  --border: #e4e9e8;
  --danger: #d9534f;
  --warning: #e0a640;
  --success: #1f9d7c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

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

.sidebar {
  width: 230px;
  background: var(--sidebar-bg);
  color: #fff;
  flex-shrink: 0;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 24px 24px;
  font-size: 20px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 12px;
}

.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
}

.nav-item {
  padding: 12px 24px;
  cursor: pointer;
  font-size: 14.5px;
  color: rgba(255,255,255,0.75);
  border-left: 3px solid transparent;
  transition: all .15s ease;
}

.nav-item:hover { background: rgba(255,255,255,0.05); color: #fff; }

.nav-item.active {
  color: #fff;
  background: rgba(31,157,124,0.15);
  border-left-color: var(--accent);
  font-weight: 600;
}

.main {
  flex: 1;
  padding: 28px 36px;
  max-width: 1200px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}

.page-header h1 { font-size: 22px; margin: 0; }
.page-header p { color: var(--muted); margin: 4px 0 0; font-size: 13.5px; }

.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent-dark); }
.btn.secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn.secondary:hover { background: #f0f2f1; }
.btn.small { padding: 6px 10px; font-size: 12.5px; }
.btn.danger { background: var(--danger); }

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.card .label {
  font-size: 12.5px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 6px;
}

.card .value {
  font-size: 24px;
  font-weight: 700;
}

.card .sub { font-size: 12px; color: var(--muted); margin-top: 4px; }

.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.panel-header h2 { font-size: 16px; margin: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; }

tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: capitalize;
}
.badge.paid { background: #e3f6ef; color: var(--success); }
.badge.pending { background: #fdf3e3; color: var(--warning); }
.badge.overdue { background: #fbe9e8; color: var(--danger); }
.badge.submitted { background: #e8eefb; color: #3b62c4; }
.badge.open { background: #fbe9e8; color: var(--danger); }
.badge.in_progress { background: #fdf3e3; color: var(--warning); }
.badge.resolved { background: #e3f6ef; color: var(--success); }

.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(10,20,18,0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal-overlay.open { display: flex; }

.modal {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  width: 420px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
}

.modal::-webkit-scrollbar {
  width: 10px;
}
.modal::-webkit-scrollbar-track {
  background: transparent;
}
.modal::-webkit-scrollbar-thumb {
  background-color: #c4cdcb;
  border-radius: 8px;
  border: 2px solid #fff;
}
.modal::-webkit-scrollbar-thumb:hover {
  background-color: #9fada9;
}
.modal {
  scrollbar-width: thin;
  scrollbar-color: #c4cdcb transparent;
}
.modal h3 { margin-top: 0; }

.field {
  margin-bottom: 12px;
}
.field label {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13.5px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
}
.filter-field {
  margin-bottom: 0;
  flex: 1 1 170px;
  max-width: 240px;
}
#rent-filter-clear { margin-bottom: 1px; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
  position: sticky;
  bottom: -24px;
  background: #fff;
  padding: 12px 0 4px;
}

.empty {
  color: var(--muted);
  font-size: 13.5px;
  padding: 20px 0;
  text-align: center;
}

.chart-wrap { height: 260px; }

.row-actions { display: flex; gap: 6px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.sidebar-footer {
  margin-top: auto;
  padding: 12px 24px 0;
}
.sidebar-footer .btn { width: 100%; }

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 340px;
  max-width: 90vw;
}
.login-card .brand {
  border-bottom: none;
  padding: 0 0 4px;
  margin-bottom: 4px;
  color: var(--text);
}
.login-sub {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 20px;
}
.login-card .btn { width: 100%; margin-top: 6px; }
.login-error {
  color: var(--danger);
  font-size: 13px;
  margin: -4px 0 12px;
}