/* =========================
   Thước Lỗ Ban - giống trenghe.vn
   ========================= */
#thuocloban {
  max-width: 100%;
  margin: 20px auto;
  padding: 15px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  font-family: Arial, sans-serif;
}

/* Tabs chọn loại thước */
#thuocloban .nav-tabs {
  display: flex;
  justify-content: center;
  border-bottom: 2px solid #eee;
  margin-bottom: 15px;
}
#thuocloban .nav-tabs li {
  list-style: none;
}
#thuocloban .nav-tabs li a {
  display: block;
  padding: 10px 20px;
  margin-right: 5px;
  background: #f5f5f5;
  color: #333;
  font-weight: bold;
  text-decoration: none;
  border-radius: 4px 4px 0 0;
  transition: all 0.3s;
}
#thuocloban .nav-tabs li a.active,
#thuocloban .nav-tabs li a:hover {
  background: #0073aa;
  color: #fff;
}

/* Thanh thước */
#thuocloban .thuocloban-ruler {
  position: relative;
  width: 100%;
  overflow-x: auto;
  white-space: nowrap;
  border: 1px solid #ddd;
  background: #fafafa;
  margin: 10px 0 15px 0;
  padding: 10px;
  cursor: grab;
}

/* Mốc mm */
#thuocloban .thuocloban-ruler .mark {
  display: inline-block;
  height: 60px;
  border-left: 1px solid #ccc;
  position: relative;
}
#thuocloban .thuocloban-ruler .mark span {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #555;
}

/* Highlight cung */
#thuocloban .highlight {
  position: absolute;
  top: 0;
  bottom: 0;
  opacity: 0.25;
}
#thuocloban .highlight.good { background: #4caf50; }
#thuocloban .highlight.bad { background: #f44336; }

/* Output hiển thị số đo */
#thuocloban .thuocloban-output {
  text-align: center;
  font-weight: bold;
  font-size: 14px;
  margin-top: 10px;
}