body {
  /* your base colour */
  background-color: #2a2a2a;

  /* embed an SVG that paints 100% of the element with fractal noise */

  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.3" numOctaves="1" stitchTiles="stitch"/><feColorMatrix type="saturate" values="0"/><feComponentTransfer><feFuncA type="linear" slope="0.05"/></feComponentTransfer></filter><rect width="100%" height="100%" filter="url(%23noise)"/></svg>');

  /* make sure it tiles to cover the whole screen */
  background-repeat: repeat;
  min-height: 100vh;
  width: 100vw;
  margin: 0;
  padding: 0;

  font-family: 'Montserrat', sans-serif;
  color: white;
}
header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background-color: #1a1a1a;
  color: white;
  width: 100vw;
  padding: 0;
  margin: 0;
  background: none;
}
#logo {
  width: 183px;
  height: 107px;
}

nav {
  max-width: 713px;
  display: flex;
  flex-grow: 1;
  justify-content: space-between;
  margin: 0 20px;
}

nav a {
  color: white;
  text-decoration: none;
  font-size: 21.2px;
  padding: 10px;
  font-weight: 700;
}

#order-online {
  border: 1px solid #b70101;
  width: 190px;
  height: 66px;
  border-radius: 33px;
  color: white;
  text-decoration: none;
  text-align: center;
  font-size: 21.2px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
}

#portada {
  width: 100vw;
  height: 80vw;
  background: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 1) 20%,
      rgba(0, 0, 0, 0.3) 50%,
      rgba(0, 0, 0, 1) 75%,
      rgba(0, 0, 0, 0) 100%
    ),
    url('portada-sushi.png') center/cover no-repeat;
}

#whatsapp-link {
  position: fixed;
  bottom: 40px;
  right: 80px;
  z-index: 1000;
  height: 112px;
}