Concept A - High-Energy Game Launch

Code

:root {
  --bg: #08060f;
  --text: #f6f4ff;
  --muted: #d0cbe3;
  --line: #40355e;
  --hot: #ff7058;
  --cyan: #6de8ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Impact", "Haettenschweiler", "Arial Narrow Bold", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 100, 88, 0.28), transparent 42%),
    radial-gradient(circle at 80% 70%, rgba(109, 232, 255, 0.25), transparent 45%),
    var(--bg);
}

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  background: rgba(8, 6, 15, 0.55);
  backdrop-filter: blur(8px);
}

.topbar a {
  color: var(--cyan);
  text-decoration: none;
  letter-spacing: 0.06em;
}

.toggle {
  border: 1px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  color: var(--text);
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

main { padding-top: 3.4rem; }

.hero {
  min-height: 100vh;
  width: min(1120px, 94%);
  margin: 0 auto;
  display: grid;
  align-content: center;
  gap: 0.8rem;
  position: relative;
  overflow: hidden;
}

.kicker {
  margin: 0;
  color: var(--cyan);
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 14vw, 11rem);
  line-height: 0.85;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  color: var(--muted);
  max-width: 52ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.cta,
.ghost {
  border: 0;
  border-radius: 999px;
  padding: 0.62rem 1rem;
  font-weight: 700;
  cursor: pointer;
}

.cta {
  background: linear-gradient(130deg, var(--hot), #ffb170);
  color: #28100f;
}

.ghost {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.3);
}

.stats {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.stats li {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.7rem;
  display: grid;
  gap: 0.2rem;
  background: rgba(255,255,255,0.02);
}

.stats strong {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.stats span {
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  font-size: 0.86rem;
  color: var(--muted);
}

.feature-row {
  width: min(1120px, 94%);
  margin: 0 auto 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.feature {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.8rem;
  background: rgba(255,255,255,0.03);
}

.feature h2 { margin: 0; font-size: clamp(1.25rem, 2.4vw, 1.8rem); }
.feature p {
  margin: 0.35rem 0 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--muted);
}

.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  margin-bottom: 2rem;
}

.track {
  white-space: nowrap;
  padding: 0.7rem 0;
  font-size: 1rem;
  letter-spacing: 0.1em;
  animation: marquee 13s linear infinite;
}

.noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background-image: radial-gradient(circle at 20% 30%, #fff 1px, transparent 1px);
  background-size: 8px 8px;
}

.beam {
  position: absolute;
  width: 260px;
  height: 260px;
  filter: blur(24px);
  opacity: 0.38;
  pointer-events: none;
  animation: pulse 5s ease-in-out infinite;
}

.beam-a {
  background: var(--hot);
  top: 12%;
  right: 4%;
}

.beam-b {
  background: var(--cyan);
  bottom: 8%;
  left: 12%;
  animation-delay: 1.5s;
}

body.no-motion .track,
body.no-motion .beam {
  animation: none;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes pulse {
  0%, 100% { transform: scale(0.9); }
  50% { transform: scale(1.2); }
}

@media (max-width: 920px) {
  .stats { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; }
}

if (!window.MotionPreference) {
  const __mql = window.matchMedia("(prefers-reduced-motion: reduce)");
  const __listeners = new Set();

  const MotionPreference = {
    prefersReducedMotion() {
      return __mql.matches;
    },
    setOverride(value) {
      const reduced = Boolean(value);
      document.documentElement.classList.toggle("reduced-motion", reduced);
      window.dispatchEvent(new CustomEvent("motion-preference", { detail: { reduced } }));
      for (const listener of __listeners) {
        try {
          listener({ reduced, override: reduced, systemReduced: __mql.matches });
        } catch {}
      }
    },
    onChange(listener) {
      __listeners.add(listener);
      try {
        listener({
          reduced: __mql.matches,
          override: null,
          systemReduced: __mql.matches,
        });
      } catch {}
      return () => __listeners.delete(listener);
    },
    getState() {
      return { reduced: __mql.matches, override: null, systemReduced: __mql.matches };
    },
  };

  window.MotionPreference = MotionPreference;
}

const toggle = document.getElementById("motionToggle");
const reducedPref = window.MotionPreference.prefersReducedMotion();
let noMotion = reducedPref;

function applyMode() {
  document.body.classList.toggle("no-motion", noMotion);
  toggle.textContent = noMotion ? "Enable motion" : "Disable motion";
}

toggle.addEventListener("click", () => {
  noMotion = !noMotion;
  applyMode();
});

applyMode();

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Concept A - High-Energy Game Launch</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <header class="topbar">
      <a href="../">Back to demos</a>
      <button id="motionToggle" class="toggle"></button>
    </header>

    <main>
      <section class="hero">
        <div class="noise" aria-hidden="true"></div>
        <div class="beam beam-a" aria-hidden="true"></div>
        <div class="beam beam-b" aria-hidden="true"></div>
        <p class="kicker">Concept A</p>
        <h1>NOVA STRIKE</h1>
        <p class="subtitle">Drop into a neon arena where every frame matters.</p>
        <div class="actions">
          <button class="cta">Pre-Order</button>
          <button class="ghost">Watch Trailer</button>
        </div>
        <ul class="stats">
          <li><strong>120 FPS</strong><span>Performance Mode</span></li>
          <li><strong>4v4</strong><span>Ranked Arena</span></li>
          <li><strong>Q4 2026</strong><span>Global Launch</span></li>
        </ul>
      </section>

      <section class="feature-row" id="features">
        <article class="feature">
          <h2>Combat Rhythm</h2>
          <p>Skill chains are built around timing windows and mobility lanes.</p>
        </article>
        <article class="feature">
          <h2>Faction Identity</h2>
          <p>Each squad has unique ability economies and tactical counters.</p>
        </article>
        <article class="feature">
          <h2>Replay Engine</h2>
          <p>Instant rewind timeline for content creators and analysts.</p>
        </article>
      </section>

      <section class="marquee" aria-label="Highlights">
        <div class="track">RANKED SEASON ONE  .  CROSSPLAY READY  .  GLOBAL TOURNAMENTS  .  PERFORMANCE-FIRST ENGINE  .</div>
      </section>
    </main>

    <script src="script.js"></script>
      </body>
</html>

Concept A - High-Energy Game Launch

Original high-energy launch concept with arena-style motion and feature blocks.

Source

Repository: libs-gen
Original demo id: 21-concept-game-launch

Notes

Original high-energy launch concept with arena-style motion and feature blocks.