@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;800&display=swap');

:root {
  --lightCyan: hsl(193, 38%, 86%);
  --neonGreen: hsl(150, 100%, 66%);
  --grayishBlue: hsl(217, 19%, 38%);
  --darkGrayishBlue: hsl(217, 19%, 24%);
  --darkBlue: hsl(218, 23%, 16%);
  --font-size: 28px;
}

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

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

html {
  font-size: var(--font-size);
}

body {
  --fs-xs: 0.4rem;
  --fs-s: 0.8rem;
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  min-height: 100vh;
  display: grid;
  place-content: center;
  background: var(--darkBlue);
  color: var(--lightCyan);
  text-align: center;
  line-height: 1.5;
  font-size: var(--fs-s);
}

main {
  width: min(95vw, 17.85rem);
  background: var(--darkGrayishBlue);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.25rem 2.375rem;
  border-radius: 0.5rem;
  position: relative;
}

h1 {
  text-transform: uppercase;
  color: var(--neonGreen);
  font-size: var(--fs-xs);
  letter-spacing: 0.15rem;
  margin-bottom: 1rem;
}

/* Reference https://css-tricks.com/almanac/properties/q/quotes/ */
blockquote {
  quotes: '“' '”';
}

blockquote::before {
  content: open-quote;
  margin-right: 0.05rem;
}
blockquote::after {
  content: close-quote;
  margin-left: 0.05rem;
}

.button-wrapper {
  position: absolute;
  bottom: 0;
  align-self: center;
  transform: translateY(50%);
  border-radius: 50%;
}

button {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: inherit;
  border: none;
  background: var(--neonGreen);
  outline: none;
  position: relative;
  cursor: pointer;
  font: inherit;
  isolation: isolate;
}

/* I decided to create an after pseudo-element to create the glow on hover
instead of animating box shadow. As I recently read and had some experiments
animating box shadow isn't much performance friendly */
button::after {
  position: absolute;
  inset: 0;
  content: '';
  background: var(--neonGreen);
  z-index: -1;
  border-radius: inherit;
  filter: blur(0.5rem);
  opacity: 0;
  transition: opacity 0.125s linear;
}

button:focus::after {
  opacity: 0.75;
}

@media (min-width: 375px) {
  body {
    --fs-xs: 0.5rem;
    --fs-s: 1rem;
  }
}

@media (hover) {
  button:hover::after {
    opacity: 0.75;
  }
}