body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f5f6f8;
  color: #111;
  margin: 0;
}

header {
  background: #111;
  color: #fff;
  padding: 20px;
}

header h1 { margin: 0; }
header p { margin: 6px 0 0; color: #ddd; }

nav {
  display: flex;
  gap: 8px;
  padding: 10px;
  background: white;
  position: sticky;
  top: 0;
  z-index: 2;
  overflow-x: auto;
  border-bottom: 1px solid #ddd;
}

nav button {
  border: 0;
  background: #eee;
  color: #111;
  border-radius: 999px;
  padding: 10px 14px;
  white-space: nowrap;
}

nav button.active { background: #111; color: white; }

main {
  max-width: 1100px;
  margin: auto;
  padding: 16px;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}

.metric {
  background: white;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.metric strong { display: block; font-size: 34px; }
.metric span { color: #555; }

input, select, button {
  font-size: 15px;
  border-radius: 10px;
  border: 1px solid #ccc;
  padding: 10px;
}

button {
  background: #111;
  color: white;
  border: 0;
  cursor: pointer;
}

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

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

th { background: #f0f0f0; }

.badge {
  border-radius: 999px;
  padding: 4px 8px;
  font-weight: bold;
  font-size: 12px;
}

.stock { background: #d9f7df; }
.good { background: #fff0b3; }
.meh { background: #eee; }

pre {
  background: #111;
  color: #0f0;
  padding: 12px;
  border-radius: 12px;
  white-space: pre-wrap;
  min-height: 60px;
}