:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: light-dark(#f5f6f8, #111418);
  --surface: light-dark(#ffffff, #1a1f25);
  --surface-2: light-dark(#eef1f5, #242b33);
  --text: light-dark(#17202a, #f2f5f7);
  --muted: light-dark(#5d6875, #aab4bf);
  --border: light-dark(#d9dee5, #37404a);
  --accent: light-dark(#2459d3, #7da2ff);
  --danger: light-dark(#b42318, #ff8a80);
  --warning: light-dark(#7a4d00, #ffd27d);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; }
button, input { font: inherit; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.topbar {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; text-decoration: none; margin-right: 12px; }
.mode-label, .state-label {
  display: inline-block;
  padding: 4px 8px;
  margin-right: 6px;
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.78rem;
  font-weight: 700;
}
.mode-label { color: var(--accent); }

.shell { display: grid; grid-template-columns: 210px minmax(0, 1fr); min-height: calc(100vh - 64px); }
.sidebar { padding: 24px 14px; border-right: 1px solid var(--border); background: var(--surface); }
.sidebar a { display: block; padding: 10px 12px; margin-bottom: 4px; border-radius: 8px; text-decoration: none; }
.sidebar a:hover { background: var(--surface-2); }
.content { width: 100%; max-width: 1180px; padding: 32px; }

h1 { margin: 0 0 20px; font-size: clamp(1.8rem, 4vw, 2.5rem); }
h2 { margin-top: 0; font-size: 1.15rem; }
.eyebrow { margin: 0 0 6px; color: var(--accent); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.muted, small { color: var(--muted); }
.page-heading { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.control-row { display: flex; gap: 10px; flex-wrap: wrap; }

.metric-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 20px 0; }
.metric, .panel, .login-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; }
.metric { padding: 18px; }
.metric span, .metric small { display: block; }
.metric strong { display: block; margin: 8px 0; font-size: 1.25rem; }
.panel { padding: 22px; margin: 18px 0; }
.empty-state { max-width: 720px; }

.alert { padding: 13px 16px; margin: 14px 0; border-left: 4px solid var(--accent); background: var(--surface); }
.alert-warning { border-left-color: var(--warning); }
.alert-danger { border-left-color: var(--danger); }
.alert-info { border-left-color: var(--accent); }

.primary-button, .quiet-button, .danger-button {
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
}
.primary-button { color: #fff; background: #2459d3; border-color: #2459d3; }
.quiet-button { color: var(--text); background: var(--surface); }
.danger-button { color: #fff; background: #b42318; border-color: #b42318; }
button:disabled { cursor: not-allowed; opacity: 0.45; }

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-panel { width: min(100%, 430px); padding: 32px; }
.form-stack { display: grid; gap: 10px; margin-top: 24px; }
.form-stack input { width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); }
.form-stack button { margin-top: 8px; }
.security-note { margin: 20px 0 0; color: var(--muted); font-size: 0.88rem; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 0.82rem; }

@media (max-width: 760px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: flex; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--border); padding: 8px; }
  .sidebar a { white-space: nowrap; margin: 0 2px; }
  .content { padding: 22px 16px; }
  .metric-grid { grid-template-columns: 1fr; }
  .page-heading, .topbar { align-items: stretch; flex-direction: column; }
}