:root {
    --dark-primary-color: #6f42c1;
    --default-primary-color: #007bff;
    --light-primary-color: #D7CCC8;
    --text-color: #FFFFFF;
    --accent-color: chartreuse;
    --primary-text-color: #212121;
    --secondary-text-color: cornflowerblue;
    --divider-color: #ffffff;
}

*, *:before, *:after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

h2 {
  font-size: 25px;
  font-weight: bold;
}

body {
  background-color: var(--divider-color);
  height: 100vh;
  font-family: Arial, sans-serif;
  font-size: 10px;
}

body > * {
  flex-shrink: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

body > header {
  background-color: var(--dark-primary-color);
  color: var(--text-color);
  padding: .5rem 1rem;
  text-align: center;
}

body > main {
  background-color: var(--divider-color);
  flex: 1 0 auto;
  flex-wrap: wrap;
  width: 100%;
  padding: 0 15px;
}

body > footer {
  background-color: var(--dark-primary-color);
  color: var(--text-color);
  padding: .5rem 1rem;
  text-align: center;
  position: fixed;
  bottom: 0;
}

article {
  background-color: var(--text-color);
  box-shadow: 2px 6px 25px rgba(0, 0, 0, 0.1);
}

article > header {

}

article > main {

}

article > footer {
  padding: 10px;
  margin: 0 30px;
  text-align: center;
  border-top: 1px solid #efefef;
}

#btnInstall, #btnInvoice, #btnLogout, #btnPrint, #btnBack {
  background-color: var(--dark-primary-color);
  color: #fff;
  display: inline-block;
  visibility: hidden;
  text-decoration: none;
  font-weight: 600;
  padding: .5rem 1rem;
  margin: 0 auto;
  display: inline-block;
  border-radius: 2px;
  width: 100%;
}

.combo-list {
  height: 60px;
}

.newline {
  width: 100%;
  min-width: 100%;
  height: 10px;
}


article h2 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.2;
}

article span {
  margin: 0 0 15px;
  font-size: 1rem;
  font-weight: 700;
}

article p {
  padding: 20px 0;
  line-height: 1.6;
  text-align: justify;
}

article > main {
  padding: 30px 30px;
}

a {
    text-decoration: none;
    color: inherit;
    min-width: 100%;
}

img {
  display: block;
  width: 100%;
  height: 200px;
  margin: auto;
}

hr {
  width: 75%;
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
}

footer a:active,
a:focus,
a:hover {
  color: var(--secondary-text-color);
}

.invoice {
  width: 100%;
}

table {
  padding: 1px;
  margin:  5px 1px;
  width: 100%;
}

tr {
  width: 100%;
}

#btnInvoice, #btnLogout, #btnPrint, #btnBack {
  height: 50px;
  font-size: 15px;
  margin: 10px 15px;
  width: 92%;
  visibility: visible;
  background-color: #002d5b;
  vertical-align: middle;

}

#btnInvoice {
  background: url('https://hotelapp.effica.io/images/icons/credit_sale.png');
  background-size: 75px;
  background-color: var(--default-primary-color);
  background-position: right center;
  background-repeat: no-repeat;
  min-width: 150px;
  text-align: left;
}

#btnLogout {
  background: url('https://hotelapp.effica.io/images/icons/exit.png');
  background-size: 75px;
  background-color: var(--default-primary-color);
  background-position: right center;
  background-repeat: no-repeat;
  min-width: 150px;
  text-align: left;
}

#btnPrint {
  background-color: #00aa00; 
}
form {
  width: 95%;
}

input {
  margin: 4px;
  padding: 5px;
  width: 100%;
}

.login {
  font-size: 18px;
  font-weight: bold;
}

.link {
  font-size: 15px;
  color: #fff;
}

#submit {
  margin: 10px 0;
  padding: 10px;
  font-size: 15px;
  width: 100%;
  background-color: #00aa00;
  color:  #fff;
  font-weight: bold;
}

#nit, #amount, #name, #gas, #pump, #payment_method {
  font-size: 25px;
  width: 90%;
}

#gas, #pump, #payment_method {
  margin: 10px;
  padding: 10px;
}

.control-label {
  display: block;
  width: 100%;
}

.main_header {
  padding-top: 120px;
  background: url('https://hotelapp.effica.io/images/icons/icon-512x512.png');
  background-size: 100px;
  background-color: var(--dark-primary-color);
  background-repeat: no-repeat;
  background-position: center 10px;
}

p {
  margin-bottom: 0;
}

.spinner-border {
  display: none;
}

#spinner-element {
  display: none;
  width: 350px; 
  height: 350px;
  margin: 0 auto;
}

.form {
  margin: 0 auto;
}

/* RESPONSIVE AREA  */

@media screen and (min-width: 800px) {
  main {
    max-width: 800px;
    margin: 20px auto;
    border-radius: 10px;
  }
  img {
    max-width: 100%;
    height: 200px;
  }
}