:root {
  --ink: #172033;
  --muted: #667085;
  --line: #d8dee8;
  --page: #f5f7fa;
  --surface: #ffffff;
  --accent: #176b87;
  --accent-dark: #0f5066;
  --warn: #9b5c00;
  --bad: #b42318;
  --good: #147a4d;
  --shadow: 0 14px 34px rgba(18, 32, 55, 0.08);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
a { color: var(--accent); text-decoration: none; }
button, input, select, textarea { font: inherit; }
.app-shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: 100vh; }
.sidebar { background: #101828; color: #fff; padding: 22px 18px; }
.brand { display: grid; gap: 5px; margin-bottom: 28px; }
.brand span { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 8px; background: #f2b84b; color: #101828; font-weight: 800; }
.brand small { color: #cbd5e1; }
nav { display: grid; gap: 7px; }
nav a { color: #dbe3f0; padding: 11px 12px; border-radius: 8px; }
nav a:hover { background: #1f2a44; color: #fff; }
.workspace { padding: 28px; display: grid; gap: 20px; align-content: start; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.eyebrow { margin: 0 0 5px; color: var(--accent); font-size: 12px; font-weight: 700; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 30px; }
h2 { font-size: 20px; margin-bottom: 12px; }
.user-pill { display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; }
.user-pill small { color: var(--muted); }
.panel, .metric { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
.panel { padding: 20px; }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(160px, 1fr)); gap: 14px; }
.metric { padding: 17px; }
.metric span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.metric strong { font-size: 28px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.wide { grid-column: 1 / -1; }
label span { display: block; margin-bottom: 6px; color: #344054; font-size: 13px; font-weight: 700; }
input, select, textarea { width: 100%; min-height: 40px; border: 1px solid #c9d2df; border-radius: 8px; padding: 9px 10px; background: #fff; color: var(--ink); }
textarea { resize: vertical; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn, button { border: 0; border-radius: 8px; min-height: 40px; padding: 0 14px; background: var(--accent); color: #fff; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; }
.btn.secondary, button.secondary { background: #eef2f7; color: var(--ink); }
.btn.danger { background: var(--bad); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 980px; }
th, td { text-align: left; padding: 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f8fafc; color: #344054; font-size: 13px; }
.muted { color: var(--muted); font-size: 13px; line-height: 1.45; }
.status { display: inline-flex; padding: 5px 9px; border-radius: 999px; background: #eef2f7; font-size: 12px; font-weight: 700; }
.status.good { background: #e7f6ee; color: var(--good); }
.status.warn { background: #fff2d6; color: var(--warn); }
.flash { background: #e7f6ee; color: var(--good); border: 1px solid #b9e4cf; border-radius: 8px; padding: 12px 14px; }
.toolbar { display: flex; justify-content: space-between; align-items: end; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.search { max-width: 420px; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(420px, 100%); background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); padding: 26px; }
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .metrics, .grid { grid-template-columns: 1fr 1fr; }
  .sidebar nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .workspace { padding: 18px; }
  .topbar { align-items: stretch; flex-direction: column; }
  .metrics, .grid, .sidebar nav { grid-template-columns: 1fr; }
}