:root {
  --ink: #1d2733;
  --ink-soft: #52606c;
  --rule: #d6dde2;
  --page: #f4f6f8;
  --card: #ffffff;
  --court-1: #0d1c33;
  --court-2: #070f1f;
  --court-3: #0d1425;
  --you: #3ee6ff;
  --them: #ff7ad1;
  --ball: #fff3c4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e2e8ec;
    --ink-soft: #9aa8b3;
    --rule: #26324a;
    --page: #070d1a;
    --card: #101a2c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
/* The court: their paddle, the ball, your paddle. */
.band {
  position: relative;
  height: 132px;
  overflow: hidden;
  background:
    radial-gradient(circle at 61% 52%, var(--ball) 0, var(--ball) 8px, rgba(255, 226, 122, .45) 10px, rgba(255, 226, 122, 0) 30px),
    linear-gradient(180deg, var(--court-1) 0%, var(--court-2) 50%, var(--court-3) 100%);
}
.band::before,
.band::after {
  content: "";
  position: absolute;
  height: 9px;
  width: 92px;
  border-radius: 5px;
}
.band::before {
  top: 20px; left: 34%;
  background: var(--them);
  box-shadow: 0 0 16px var(--them);
}
.band::after {
  bottom: 20px; left: 50%;
  background: var(--you);
  box-shadow: 0 0 16px var(--you);
}
main { max-width: 40rem; margin: 0 auto; padding: 2.4rem 1.4rem 4rem; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .3rem; font-weight: 600; letter-spacing: -0.01em; }
.tagline { color: var(--ink-soft); margin: 0 0 2.4rem; }
h2 { font-size: 1.15rem; margin: 2.6rem 0 .8rem; font-weight: 600; }
h3 { font-size: 1rem; margin: 1.7rem 0 .3rem; font-weight: 600; }
p { margin: 0 0 1rem; }
a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 1.1rem 1.2rem; margin: 0 0 1rem; }
.card p:last-child { margin-bottom: 0; }
ul { margin: 0 0 1rem; padding-left: 1.2rem; }
li { margin-bottom: .35rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0 0; }
footer { color: var(--ink-soft); font-size: .9rem; padding-top: 1.2rem; }