:root {
  --color-black:   #000000;
  --color-orange:  #e8520a;
  --color-orange-dark: #c0300a;
  --color-white:   #ffffff;
  --color-active-gradient: linear-gradient(to right, #e8520a, #c0300a);
  --color-muted:   rgba(255, 255, 255, 0.55);

  --header-height: 48px;
  --footer-height: 160px;
  --app-height:    100vh; /* overridden by JS on iOS */
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--color-black);
  color: var(--color-white);
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

body {
  display: flex;
  flex-direction: column;
  height: var(--app-height);
  font-family: Arial, Helvetica, sans-serif;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
  padding: 0;
}

img {
  display: block;
  max-width: 100%;
}