/* ============ Design tokens ============ */
:root {
  --navy-900: #101A2E;
  --navy-700: #1B2A47;
  --navy-500: #33456B;
  --canvas: #F5F6F8;
  --surface: #FFFFFF;
  --border: #E3E6EB;
  --text-primary: #131B2C;
  --text-secondary: #5C6579;
  --text-muted: #93980;
  --accent: #1F6F5C;
  --accent-soft: #E4F0EC;
  --danger: #B3261E;
  --danger-soft: #FAEAE9;
  --amber: #9A6A0C;
  --amber-soft: #FBF1DE;

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--canvas);
  color: var(--text-primary);
  font-size: 14px;
}

/* ============ Shell layout ============ */
.shell {
  display: flex;
  min-height: 100vh;
}

/* ============ Sidebar: icon rail, expands on hover ============ */
.sidebar {
  width: 64px;
  background: var(--navy-900);
  color: #C9CEDB;
  flex-shrink: 0;
  overflow: hidden;
  transition: width 160ms ease;
  position: relative;
  z-index: 10;
}
.sidebar:hover { width: 216px; }

.sidebar__brand {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  color: #fff;
  white-space: nowrap;
  border-bottom: 1px solid var(--navy-700);
}

.sidebar__nav { padding: 12px 0; }

.sidebar__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 11px 20px;
  color: #AEB5C8;
  text-decoration: none;
  white-space: nowrap;
  font-size: 13.5px;
  border-left: 3px solid transparent;
}
.sidebar__item:hover {
  background: var(--navy-700);
  color: #fff;
}
.sidebar__item--active {
  background: var(--navy-700);
  color: #fff;
  border-left-color: var(--accent);
}
.sidebar__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.sidebar__icon svg { width: 100%; height: 100%; }

.sidebar__footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  border-top: 1px solid var(--navy-700);
}

/* ============ Main content ============ */
.main {
  flex: 1;
  min-width: 0;
}

.topbar {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
}
.topbar__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
}
.topbar__meta {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.content { padding: 28px; }

/* ============ KPI cards ============ */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
}
.kpi-card__label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.kpi-card__value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}
.kpi-card__value--accent { color: var(--accent); }

/* ============ Panels ============ */
.panel-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.panel__header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
}
.panel__body { padding: 4px 0; }
.panel__empty {
  padding: 24px 20px;
  color: var(--text-secondary);
  font-size: 13px;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.data-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: 8px 20px;
  border-bottom: 1px solid var(--border);
}
table.data-table td {
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
}
table.data-table tr:last-child td { border-bottom: none; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}
.badge--danger { background: var(--danger-soft); color: var(--danger); }
.badge--amber { background: var(--amber-soft); color: var(--amber); }
.badge--accent { background: var(--accent-soft); color: var(--accent); }