* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  background: #000; color: #fff;
  font-family: "Courier New", monospace;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  background-image: radial-gradient(#1a1a1a 1px, transparent 1px);
  background-size: 24px 24px;
}
main { padding: 2rem; }
header { padding: 2rem 2rem 0; }
.tabs { display: flex; gap: .5rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2rem; }
.tab {
  background: none; color: #777; border: none; border-bottom: 1px solid transparent;
  font: inherit; text-transform: uppercase; letter-spacing: .2em;
  padding: .6rem 1.2rem; cursor: pointer; transition: color .2s, border-color .2s;
}
.tab:hover, .tab.active { color: #fff; border-bottom-color: #fff; }
.panel { display: none; min-height: 140px; }
.panel.active { display: block; animation: fade .3s; }
.panel h2 { text-transform: uppercase; letter-spacing: .3em; margin-bottom: 1rem; }
.panel p { max-width: 520px; margin: 0 auto .6rem; line-height: 1.6; }
.muted { color: #777; }
.product { border: 1px solid #fff; max-width: 420px; margin: 0 auto 1.5rem; padding: 1.5rem; text-align: left; }
.product h3 { text-transform: uppercase; letter-spacing: .2em; margin-bottom: .4rem; }
.product ul { list-style: none; margin: 1rem 0; }
.product li { padding: .25rem 0; color: #ccc; }
.product li::before { content: "+ "; color: #777; }
.price { color: #777; margin: 0 0 1rem !important; }
.buy {
  display: inline-block; color: #fff; text-decoration: none; border: 1px solid #fff;
  padding: .7rem 1.5rem; text-transform: uppercase; letter-spacing: .2em; transition: background .2s, color .2s;
}
.buy:hover { background: #fff; color: #000; }
.soon { color: #777; letter-spacing: .4em; text-transform: uppercase; border: 1px dashed #444; display: inline-block; padding: 1rem 2rem; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
h1 { font-size: clamp(3rem, 12vw, 8rem); letter-spacing: .15em; font-weight: 700; position: relative; }
.sub { color: #777; margin: .5rem 0 1.5rem; letter-spacing: .3em; }
nav { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
nav a {
  color: #fff; text-decoration: none; border: 1px solid #fff;
  padding: .8rem 2rem; text-transform: uppercase; letter-spacing: .2em;
  transition: background .2s, color .2s;
}
nav a:hover { background: #fff; color: #000; }
footer { position: absolute; bottom: 1rem; color: #444; font-size: .8rem; }
.glitch:hover { animation: shake .3s infinite; text-shadow: 3px 0 #888, -3px 0 #444; }
@keyframes shake {
  0% { transform: translate(0); } 25% { transform: translate(-2px, 1px); }
  50% { transform: translate(2px, -1px); } 75% { transform: translate(-1px, -2px); }
  100% { transform: translate(0); }
}