:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --ok: #059669;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  color: var(--primary);
  font-size: 18px;
}

.brand h1 {
  margin: 0;
  font-size: 20px;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ok);
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: calc(100vh - 120px);
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--surface);
  padding: 16px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.nav-item {
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--text);
}

.nav-item:hover {
  background: #eef2ff;
}

.nav-item.is-active {
  border-color: #c7d2fe;
  background: #eef2ff;
  color: var(--primary-dark);
  font-weight: 600;
}

.content {
  padding: 20px;
}

.panel {
  display: none;
}

.panel.is-visible {
  display: block;
}

.panel h2 {
  margin-top: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.card p {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--muted);
}

.list {
  display: grid;
  gap: 8px;
}

.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  cursor: pointer;
}

.btn-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.pill {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #f9fafb;
  font-size: 12px;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 10px 24px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }
}