body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #1f2937;
  display: flex;
}

aside {
  width: 260px;
  min-height: 100vh;
  background: #111827;
  color: white;
  padding: 24px;
}

.brand h1 {
  margin: 0;
  font-size: 28px;
}

.brand p {
  color: #cbd5e1;
  margin-bottom: 4px;
}

.brand small {
  color: #94a3b8;
}

nav {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

nav a {
  color: #e5e7eb;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
}

nav a:hover {
  background: #1f2937;
}

main {
  flex: 1;
  padding: 32px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 16px;
}

.card {
  background: white;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

.card strong {
  font-size: 32px;
}

.alert {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 18px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 10px 12px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  font-size: 14px;
}

footer {
  margin-top: 40px;
  color: #6b7280;
  font-size: 13px;
}

.filters {
  display: flex;
  gap: 10px;
  margin: 0 0 18px 0;
  flex-wrap: wrap;
}

.filters a {
  background: white;
  border: 1px solid #e5e7eb;
  padding: 9px 12px;
  border-radius: 10px;
  color: #111827;
  text-decoration: none;
  font-size: 14px;
}

.filters a:hover {
  background: #f3f4f6;
}