style.css

body {
  overflow: hidden;
}
.excel-container {
  height: calc(100vh - 88px);
  overflow: auto;
}

#viewer {
  position: relative;
  min-height: 100vh;
}

#fileInput {
  position: absolute;
  top: 0;
  right: 0;
  opacity: 0;
}
th, td {
  border: 1px solid black !important;
}
.excelButtons {
  display: flex;
  width: 100%;
  background: gray;
}
.excelButtons button {
  background: lightgray;
  color: gray;
  font-size: 12px;
  padding: 5px;
}
.excelButtons button:first-child {
  border-top-left-radius: 5px;
}
.excelButtons button:last-child {
  border-top-right-radius: 5px;
}
.excelButtons button.active {
  background: white;
  color: green;
  font-weight: 600;
}
.excelButtons button:focus {
  outline: none;
}
.excel-table {
  font-size: 12px;
}
.excel-table td {
  padding: 5px !important;
}
.excel-table {
  background: white;
  height: calc(100% - 70px);
  min-height: 100%;
}
.excel-table tr:nth-child(1) {
  background: green;
  color: white;
  font-weight: 600;
}

.button {
  background: green;
  color: white;
  position: relative;
  overflow: hidden;
}

.button:hover {
  color: white;
}

.navbar {
  color: green;
  font-weight: 500;
  border-bottom: 1px solid green;
  border-top: 1px solid green;
}

.navbar p {
  margin: 0;
  width: 100%;
  text-align: center;
  font-size: 20px;
}

.flex {
  display: flex;
  align-items: center;
}

.full-width {
  width: 100%;
}
  
.no-sheet {
  font-size: 20px;
  color: gray;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}