:root {
  --sidebar: #1c2640;
  --sidebar-soft: #253352;
  --sidebar-text: #c8d2ea;
  --accent: #4f6bff;
  --bg: #f4f6fa;
  --card: #ffffff;
  --line: #e4e8ef;
  --text: #1a2332;
  --muted: #5c6b80;
  --ok: #067647;
  --warn: #b54708;
  --bad: #b42318;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", system-ui, sans-serif; }
.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 248px; background: var(--sidebar); color: var(--sidebar-text); flex-shrink: 0; }
.brand { display: flex; gap: 10px; align-items: center; padding: 18px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand-mark { width: 34px; height: 34px; border-radius: 8px; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; }
.brand strong { display: block; color: #fff; font-size: 14px; }
.brand small { color: var(--sidebar-text); }
.sidebar nav { padding: 10px; display: flex; flex-direction: column; gap: 2px; }
.sidebar .nav-link { color: var(--sidebar-text); text-decoration: none; border-radius: 8px; padding: 8px 10px; display: flex; gap: 8px; align-items: center; font-size: 14px; }
.sidebar .nav-link.active, .sidebar .nav-link:hover { background: var(--sidebar-soft); color: #fff; }
.main { flex: 1; min-width: 0; }
.topbar { height: 58px; background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; padding: 0 18px; }
.content { padding: 22px; }
.page-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 16px; }
.page-head h1 { font-size: 22px; margin: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.metric { padding: 14px 16px; }
.metric span { display: block; color: var(--muted); font-size: 12px; }
.metric strong { font-size: 20px; }
.table thead th { font-size: 12px; color: var(--muted); font-weight: 600; white-space: nowrap; }
.badge-status { border-radius: 999px; padding: 2px 8px; font-size: 12px; background: #eef2ff; color: #24356b; }
.badge-status.paid, .badge-status.active, .tone-done { background: #e7f6ee; color: var(--ok); }
.badge-status.partial, .tone-soon { background: #fff6e8; color: var(--warn); }
.badge-status.voided, .badge-status.passive, .tone-late { background: #fdecec; color: var(--bad); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.empty { padding: 36px 16px; text-align: center; color: var(--muted); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.tabs a { text-decoration: none; color: var(--muted); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; font-size: 13px; }
.tabs a.active { background: var(--sidebar); color: #fff; border-color: var(--sidebar); }
.auth-body { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(160deg, #1c2640, #31456f); }
.auth-wrap { width: min(460px, calc(100% - 24px)); }
.auth-card { background: #fff; border-radius: 16px; padding: 28px; }
.help { color: var(--muted); font-size: 12px; }
.chart-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px; margin-top: 12px; }
.formula { font-size: 13px; color: var(--muted); }
@media (max-width: 1100px) {
  .metric-grid, .chart-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 20; transform: translateX(-105%); transition: .2s; }
  .sidebar.open { transform: none; }
  .metric-grid, .chart-grid { grid-template-columns: 1fr; }
  .content { padding: 14px; }
}