:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --ink: #1c2333;
  --muted: #6b7488;
  --brand: #2f6df6;
  --brand-ink: #ffffff;
  --border: #e4e8f0;
  --danger: #c0392b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 30, 60, 0.08), 0 4px 16px rgba(20, 30, 60, 0.06);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
a { color: var(--brand); text-decoration: none; }

/* Top bar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 60px; position: sticky; top: 0; z-index: 10;
}
.topbar .brand { font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.topbar .brand .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--brand); }
.topbar .user { display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 14px; }
.btn {
  border: 1px solid var(--border); background: var(--card); color: var(--ink);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn-primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn-primary:hover { opacity: 0.92; color: var(--brand-ink); }

.container { max-width: 1200px; margin: 0 auto; padding: 28px 24px; }
.page-title { font-size: 22px; font-weight: 700; margin: 0 0 4px; }
.page-sub { color: var(--muted); margin: 0 0 24px; }

/* Portal tiles */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.tile {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.tile:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(20, 30, 60, 0.12); }
.tile .icon { font-size: 28px; }
.tile h3 { margin: 10px 0 6px; font-size: 17px; }
.tile p { margin: 0; color: var(--muted); font-size: 14px; }
.empty { color: var(--muted); background: var(--card); border: 1px dashed var(--border);
  border-radius: var(--radius); padding: 40px; text-align: center; }

/* Dashboard layout */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin-bottom: 20px; }
.kpi { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.kpi .label { color: var(--muted); font-size: 13px; }
.kpi .value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.cards { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; }
.card h3 { margin: 0 0 10px; font-size: 15px; }
.card .chart { width: 100%; height: 320px; }
.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
@media (max-width: 900px) { .col-8, .col-6, .col-4 { grid-column: span 12; } }

.banner { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; }
.banner-warn { background: #fff7e6; border: 1px solid #ffe1a8; color: #8a5b00; }
.banner-error { background: #fdecea; border: 1px solid #f5c6c2; color: var(--danger); }
.chart-error { color: var(--danger); }
.muted { color: var(--muted); }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 18px; }
select, input { font: inherit; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 32px; width: 100%; max-width: 380px; }
.login-card h1 { font-size: 20px; margin: 0 0 4px; display: flex; align-items: center; gap: 10px; }
.login-card .sub { color: var(--muted); margin: 0 0 22px; font-size: 14px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input { width: 100%; }
.login-card .btn-primary { width: 100%; padding: 11px; font-size: 15px; }
.form-error { color: var(--danger); font-size: 14px; min-height: 18px; margin-bottom: 10px; }
.spinner { display: inline-block; width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--brand); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.center { display: flex; justify-content: center; padding: 40px; }