SignatureCardFrontend/stylesheet.css

:root {
  --blue: #007bff;
  --indigo: #6610f2;
  --purple: #6f42c1;
  --pink: #e83e8c;
  --red: #dc3545;
  --orange: #fd7e14;
  --yellow: #ffc107;
  --green: #28a745;
  --teal: #20c997;
  --cyan: #17a2b8;
  --white: #fff;
  --gray: #6c757d;
  --gray-dark: #343a40;
  --secondary: #6c757d;
  --success: #28a745;
  --info: #17a2b8;
  --warning: #ffc107;
  --danger: #dc3545;
  --light: #f8f9fa;
  --dark: #343a40;

  --theme-blue: #007bff;
  --theme-blue-hover: #0064d9;
  --theme-dark-blue: hsl(198,90%,15%);
  --theme-active: #002872;

  --breakpoint-xs: 0;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --font-family-sans-serif: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
  --font-family-monospace: SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;
  --text-color: #212529;
  --text-color-neg: #ffffff;
  --background-color: #ffffff;
  --secondary-color: #f8f9fa !important;
  --secondary-accent: #495057;
  --trans-dur: 0.3s;
}

*, ::after, ::before {
  box-sizing: inherit;
}

html {
  font-family: sans-serif;
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  text-align: left;
  color: var(--text-color);
  background-color: var(--background-color);
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--secondary-color);
}

footer {
  text-align: center;
  font-size: 12px;
}

button {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  overflow: visible;
  text-transform: none;
}

input {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  overflow: visible;
  background-color: var(--secondary-color);
}

textarea {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  background-color: var(--secondary-color);
}

select {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  text-transform: none;
}

label {
  display: inline-block;
  margin-bottom: .5rem;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: .5rem;
}
.h1, .h2, .h3, .h4, .h5, .h6, h1, h2, h3, h4, h5, h6 {
  margin-bottom: .5rem;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.2;
  color: inherit;
}
.h1, h1 {
  font-size: 2.5rem;
}
.h2, h2 {
  font-size: 2rem;
}

.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  border: 1px solid transparent;
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: .25rem;
  transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
.btn-primary {
  color: #fff;
  background-color: var(--theme-blue);
  border-color: var(--theme-blue);
}
.btn:not(:disabled):not(.disabled) {
  cursor: pointer;
}

select.form-control:not([size]):not([multiple]) {
  height: calc(2.25rem + 2px);
}

input[type="checkbox"], input[type="radio"] {
  box-sizing: border-box;
  padding: 0;
}

[type="reset"], [type="submit"], button, html [type="button"] {
  -webkit-appearance: button;
}

/*--------------------------------------*/

.dark-theme {
  --text-color: #ffffff;
  --text-color-neg: #212529;
  --background-color: #28272d;
  --secondary-color: #1f1e23 !important;
  --secondary-accent: #181818;
}

.text-center {
  text-align: center !important;
}

.mt {
  margin-top: 1rem !important;
}

.mb {
  margin-bottom: 1rem !important;
}

.form-group {
  margin-bottom: 1rem;
}
.form-control {
  display: block;
  width: 100%;
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--secondary-color);
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: .25rem;
  transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.logo {
  display: inline-block;
  padding-top: 0.25em;
  padding-bottom: 0.25em;
  padding-left: 0.5em;
}

.navbar {
  margin-top: -5px;
}
.navbar ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: var(--theme-blue);
}
.navbar li {
  float: left;
}
.navbar li:first-child {
  margin-left: 10em;
}
.navbar li:last-child {
  margin-right: 10em;
}
.navbar li a {
  display: block;
  color: var(--white);
  text-align: center;
  padding: 1.5em;
  text-decoration: none;
}
.navbar li a:hover:not(.active) {
  background-color: var(--theme-blue-hover);
}
.active {
  background-color: var(--theme-active);
}
.float-left {
  float:left !important;
}
.float-right {
  float: right !important;
}

.navbar-brand{
  padding-top:.3125rem;
  padding-bottom:.3125rem;
  margin-right:1rem;
  font-size:1.25rem;
  line-height:inherit;
  white-space:nowrap
}

.navbar-brand:focus, .navbar-brand:hover {
  text-decoration:none;
}

.card {
  margin: auto;
  width: 24em;
}

.fade {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: white;
  opacity: 50%;
}

.upload {
  opacity: 100% !important;
  border-radius: .5rem;
  padding: 1em;
  border: solid 2px var(--theme-dark-blue);
  background-color: var(--background-color);
  position: absolute;
  width: 16em;
  height: 9em;
  left: 50%;
  top: 14em;
  margin-left: -9em;
}

.hidden {
  display: none;
}

.dotted {
  display: flex;
  border: dotted 2px var(--theme-dark-blue);
  width: 100%;
  height: 100%;
  text-align: center;
  align-items: center;
}

/*--------------------------------------*/

.container {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}
@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}
@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}
@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}
@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}