:root {
  --bg: #f3f5f7;
  --panel: #ffffff;
  --line: #dde3e8;
  --text: #1f2a37;
  --muted: #617082;
  --accent: #004f99;
  --danger: #9f1239;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", Tahoma, sans-serif; background: var(--bg); color: var(--text); }
.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: #0f172a; color: #e2e8f0; padding: 16px; display: flex; flex-direction: column; gap: 16px; }
.sidebar .brand { font-weight: 700; font-size: 18px; margin-bottom: 8px; }
.sidebar nav { display: grid; gap: 6px; }
.sidebar nav a { color: #cbd5e1; text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.sidebar nav a.active, .sidebar nav a:hover { background: #1e293b; color: #fff; }
.sidebar .meta { margin-top: auto; font-size: 13px; color: #94a3b8; }
.sidebar button { margin-top: 8px; width: 100%; background: #1e293b; color: #fff; border: 1px solid #334155; border-radius: 8px; padding: 8px; }
.content { padding: 18px; display: grid; gap: 12px; }
.topline { display: flex; justify-content: space-between; align-items: center; }
h1 { margin: 0; font-size: 24px; }
h2, h3 { margin-top: 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.grid { display: grid; gap: 12px; }
.kpi-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.two-col { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.k { color: var(--muted); font-size: 12px; }
.v { font-size: 26px; font-weight: 700; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
input, select, button { font: inherit; }
input, select { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: #fff; }
button, .btn { border: 1px solid #1d4f91; background: var(--accent); color: #fff; border-radius: 8px; padding: 8px 10px; cursor: pointer; text-decoration: none; display: inline-block; }
.checkbox { display: inline-flex; gap: 6px; align-items: center; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 8px; vertical-align: top; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.alert { border-radius: 8px; padding: 8px 10px; margin-bottom: 10px; }
.alert.error { background: #ffe4e6; color: var(--danger); border: 1px solid #fecdd3; }
.alert.warn { background: #ffedd5; color: #9a3412; border: 1px solid #fed7aa; }
.auth-wrap { max-width: 460px; margin: 8vh auto; padding: 16px; }
.auth-card form { display: grid; gap: 8px; }
@media (max-width: 980px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { border-bottom: 1px solid #334155; }
}