css/orlygenerator.css
:root {
  /* Global spacing */
  --margin: 2rem;
  --padding: 1rem;
  /* Preview dimensions */
  --size: 700px;
  --ratio: 1.41421356237; /* sqrt(2) */
  /* Container dimensions */
  --title-container: 8rem;
  /* Text- dimensions */
  --title: 3rem;
  --title-line-height: 3.5rem;
  --subtitle: 1.4rem;
  --text: 1rem;
  /* Accent color*/
  --color: #55135D;
  /* Transition duraction */
  --transition: .6s;
}

* {
  box-sizing: border-box;
  margin: 0;
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  align-items: center;
  background-color: black;
  background-image: radial-gradient(ellipse at left, var(--color) -50%, transparent), radial-gradient(ellipse at right, var(--color) -50%, transparent);
  display: flex;
  flex-direction: column;
  font-family: sans-serif;
  justify-content: center;
}

.lang-select {
  position: absolute;
  right: var(--margin);
  text-align: left;
  top: var(--margin);
  width: 8rem;
}

h1 {
  color: white;
  margin: calc(var(--text) / 6);
}

p i {
  color: white;
  font-size: .9rem;
}

.content-wrapper {
  align-items: center;
  display: flex;
  height: 80%;
  justify-content: center;
  margin: 0 var(--margin);
  width: 100%;
}

/* Preview container and content rules */

.preview-container {
  align-items: center;
  display: flex;
  height: 100%;
  justify-content: center;
  text-align: center;
  width: calc((var(--size) / var(--ratio)) + 10%);
}

.preview {
  background-color: rgb(255, 255, 255);
  box-shadow: 0 0 .4rem rgba(225, 225, 225, .6);
  font-family: serif;
  height: var(--size);
  position: relative;
  width: calc(var(--size) / var(--ratio));
}

.preview-top-border {
  background-color: var(--color);
  height: calc(var(--text) / 3);
  margin: 0 auto;
  width: calc(100% - (2 * var(--margin)));
  transition: background-color var(--transition);
}

.preview-header-text {
  font-style: italic;
  font-size: var(--text);
  height: var(--text); /* Mandatory to keep layout consistent with empty text */
}

.preview-image-container {
  align-items: center;
  display: flex;
  height: calc(100% - var(--title-container) - (var(--text) - var(--text) / 3) - (2 * var(--margin)) + var(--subtitle) - (var(--text) + (2 * var(--margin))));
  justify-content: center;
  padding: var(--margin);
  width: 100%;
}

.preview-image-container img {
  max-height: 100%;
  max-width: 100%;
}

.preview-title-container {
  align-items: center;
  background-color: var(--color);
  bottom: calc(var(--text) + (2 * var(--margin)) + var(--subtitle));
  display: flex;
  height: var(--title-container);
  justify-content: left;
  left: var(--margin);
  margin-bottom: calc(var(--margin) / 4);
  padding: var(--padding) var(--margin);
  position: absolute;
  text-align: left;
  width: calc(100% - (2 * var(--margin)));
  transition: background-color var(--transition);
}

.preview-title-container p {
  color: white;
  font-size: var(--title);
  line-height: var(--title-line-height);
}

.preview-subtitle-text {
  bottom: calc(var(--text) + (2 * var(--margin)));
  font-size: var(--subtitle);
  font-style: italic;
  position: absolute;
  right: var(--padding);
  text-align: right;
}

.preview-orly {
  bottom: var(--margin);
  font-family: sans-serif;
  font-size: var(--text);
  font-weight: bold;
  left: var(--margin);
  position: absolute;
}

sup {
  color: var(--color);
  transition: color var(--transition);
}

.preview-signature-text {
  bottom: var(--margin);
  font-size: .9rem;
  font-style: italic;
  position: absolute;
  right: var(--margin);
}

/* Personalization rules */

.parameters {
  align-items: center;
  background-color: rgb(250, 250, 250);
  border-radius: 5px;
  display: flex;
  justify-content: center;
  margin: var(--margin) 0;
  min-width: 345px;
  max-width: 445px;
  padding: calc(var(--margin) / 1.3);
  width: 30%;
}

.param-predefined-colors {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.param-predefined-colors div {
  align-items: center;
  border: solid 1px grey;
  display: flex;
  cursor: pointer;
  height: 1.5rem;
  justify-content: center;
  margin: calc(var(--padding) * .2);
  padding: 2px;
  width: 1.5rem;
}

.param-predefined-colors div svg {
  height: 100%;
}

.param-predefined-colors div.selected, .params-input-color.selected {
  border-color: var(--color);
  box-shadow: 0 0 3px var(--color);
}

label, input, select {
  display: block;
}

label {
  color: #3C405D;
  display: flex;
  font-size: .9rem;
  font-style: italic;
  margin-bottom: .3rem;
  position: relative;
}

input, select {
  font-weight: bold;
  margin-bottom: var(--text);
  width: 100%;
}

input {
  background: none;
  border: none;
  border-bottom: solid 1px rgb(142, 142, 142);
  padding: .2rem 0;
  transition: border-color var(--transition);
  text-overflow: ellipsis;
}

input:active,
input:focus,
input:hover {
  border-color: var(--color);
}

input[type="color"] {
  border: solid 1px rgb(142, 142, 142);
  padding: 2px;
}

label[for="flip-image"],
label[for="v-flip-image"] {
  display: inline-block;
  width: initial;
}

label + svg {
  cursor: pointer;
  float: right;
  height: var(--text);
  vertical-align: bottom;
}

label[data-maxlength]:before {
  content: attr(data-before);
  color: red;
  left: -1.1rem;
  font-size: .6rem;
  position: absolute;
  top: 1.4rem;
}

.title-centering,
.subtitle-centering {
  display: flex;
  justify-content: space-between;
  margin-left: auto;
}

.title-centering svg,
.subtitle-centering svg {
  cursor: pointer;
  height: .9rem;
  margin-left: 1rem;
  transition: fill var(--transition);
}

label + svg.selected,
.title-centering svg.selected,
.subtitle-centering svg.selected {
  fill: var(--color);
}

button {
  background-color: transparent;
  border: solid 2px rgb(142, 142, 142);
  border-radius: .3rem;
  color: #3C405D;
  cursor: pointer;
  margin-top: calc(var(--padding) / 2);
  padding: calc(var(--padding) / 2);
  transition: background-color var(--transition) ease, color var(--transition) ease;
  width: 100%;
}

button#download {
  background-color: var(--color);
  color: white;
}

button:active,
button:focus,
button:hover {
  background-color: rgb(240, 240, 240);
  color: #21252B;
}

/* Reponsive rules */

@media screen and (max-width: 1000px) {
  :root {
    /* Global spacing */
    --margin: 1.42857142858rem;
    --padding: .71428571429rem;
    /* Preview dimensions */
    --size: 500px; /* -200px = -28.571428571429% */
    --ratio: 1.41421356237; /* sqrt(2) */
    /* Container dimensions */
    --title-container: 8.57142857143rem;
    /* Text dimensions */
    --title: 2.14285714286rem;
    --title-line-height: 2.5rem;
    --subtitle: 1rem;
    --text: .71428571429rem;
  }

  body {
    display: block;
    padding: var(--padding) 0;
    text-align: center;
  }

  h1 {
    padding: 0 var(--padding);
    margin-top: 3rem; /* So it don't overlap with select lang */
  }

  .content-wrapper {
    align-items: center;
    flex-direction: column;
    height: auto;
    margin: var(--margin) auto 0 auto;
  }

  .preview-container, .parameters {
    width: 100%;
  }

  .parameters {
    border-radius: 0;
    max-width: inherit;
  }

  input, select {
    text-align: center;
  }

  label[for="flip-image"],
  label[for="v-flip-image"] {
    float: left;
  }

  .credits {
    margin-bottom: var(--margin);
  }
}
