body {
  text-align: center;
  font-family: "Helvetica", sans-serif;
  margin: 0;
  padding: 0;
}

p {
  display: block;
  margin-top: 0;
  margin-bottom: 0;
  margin-left: 0;
  margin-right: 0;
}

h1 {
  font-size: 2em;
  font-weight: bold;
}

button {
  color: black;
  background-color: transparent;
  border-radius: 15px;
  padding: 10px;
  border: solid 2px #4791d0;
  transition: all 0.1s ease-in-out;
  margin: 5px;
}

button:hover {
  padding-left: 15px;
  padding-right: 15px;
  background-color: #4791d0;
  color: white;
  cursor: pointer;
}

#drives {
  font-family: "Helvetica", sans-serif;
  border-collapse: collapse;
  width: 100%;
  margin: 0px;
}

#drives td,
#drives th {
  border: 1px solid #0F5897;
  padding: 8px;
}

#drives tr:nth-child(even) {
  background-color: #f2f2f2;
}

#drives tr:hover {
  background-color: #ddd;
}

#drives th {
  padding-top: 12px;
  padding-bottom: 12px;
  background-color: #4791d0;
  color: white;
}

#bill {
  font-family: "Helvetica", sans-serif;
  border-collapse: collapse;
  width: 100%;
  margin: 0px;
}

#bill td,
#bill th {
  border: 1px solid #0F5897;
  padding: 8px;
}

#bill tr:nth-child(even) {
  background-color: #f2f2f2;
}

#bill tr:hover {
  background-color: #ddd;
}

#bill th {
  padding-top: 12px;
  padding-bottom: 12px;
  background-color: #4791d0;
  color: white;
}

#add_drive_table {
  font-family: "Helvetica", sans-serif;
  border-collapse: collapse;
  width: 100%;
  margin: 0px;
}

#add_drive_table td,
#add_drive_table th {
  border: 1px solid #0F5897;
  padding: 8px;
}

#add_drive_table th {
  padding-top: 12px;
  padding-bottom: 12px;
  background-color: #4791d0;
  color: white;
}

.container {
  font-size: large;
  font-family: "Helvetica", sans-serif;
}

.tab-bar {
  margin: 0px;
  float: left;
  width: 20%;
  display: block;
  outline: 0;
  font-size: large;
  font-family: "Helvetica", sans-serif;
}

.tablink {
  color: white;
  background-color: #4791d0;
  border-radius: 7px 7px 0px 0px;
  border-width: 1px 1px 0px 1px;
  border-color: #0F5897;
  padding: 8px;
}

.tablink:hover {
  background-color: #0F5897;
  border-radius: 7px 7px 0px 0px;
}

.tabsel {
  color: #0F5897;
  background-color: white;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type=number] {
  -moz-appearance: textfield;
}

.btn {
  color: black;
  background-color: transparent;
  border-radius: 15px;
  padding: 10px 20px;
  border: solid 2px #4791d0;
  transition: all 0.1s ease-in-out;
}

.btn:hover {
  padding: 10px 25px;
  background-color: #4791d0;
  color: white;
  cursor: pointer;
}

input, select {
  padding: 10px;
  border-radius: 4px;
  border: solid 1px #ddd;
  margin: 5px;
}

input::placeholder {
  color: #c0bfbf;
}

.has-error  {
  background: #fee2e2;
  border: solid 1px #ef4444;
}

.has-error::placeholder {
  color: #fecaca;
}

.no-transition {
  padding-left: 15px;
  padding-right: 15px;
}