:root {
  --bg: #14161c;
  --bg-panel: #1c1f28;
  --bg-panel-alt: #232733;
  --border: #2c3040;
  --text: #e6e8ee;
  --text-dim: #9197a6;
  --accent: #5b8cff;
  --accent-dim: #3a4a7a;
  --green: #4fd17a;
  --red: #ff6868;
  --yellow: #f0c14b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 200px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 20px 0;
}

.brand {
  font-size: 16px;
  font-weight: bold;
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: block;
  padding: 12px 20px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  border-left: 3px solid transparent;
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-panel-alt);
}

.nav-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--bg-panel-alt);
}

.content {
  flex: 1;
  padding: 28px 32px;
  max-width: 1200px;
}

.view { display: none; }
.view.active { display: block; }

h1 { font-size: 20px; margin: 0 0 20px; }
h2 { font-size: 16px; margin: 0 0 12px; color: var(--text-dim); }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
}

.kpi-label { font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.kpi-value { font-size: 26px; font-weight: bold; }
.kpi-value.green { color: var(--green); }
.kpi-value.yellow { color: var(--yellow); }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th { color: var(--text-dim); font-weight: 500; }

tr.overdue td { color: var(--red); }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 12px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
}

select, input, button, textarea {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 13px;
  font-family: inherit;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 500;
}

button:hover { opacity: 0.9; }

button.secondary {
  background: var(--bg-panel-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  color: var(--text-dim);
  gap: 4px;
}

.charts-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.chart-box { position: relative; height: 280px; }

.muted { color: var(--text-dim); font-size: 13px; }

@media print {
  .sidebar, .no-print { display: none !important; }
  .content { padding: 0; max-width: none; }
  body { background: white; color: black; }
}