:root {
  color-scheme: dark;
  --bg: #0a0014;
  --panel: #150522;
  --ink: #f7efff;
  --muted: #c8b9d5;
  --pink: #ff006e;
  --cyan: #00ffff;
  --line: rgba(0, 255, 255, 0.28);
  --font: "Space Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 85% 8%, rgba(255, 0, 110, 0.16), transparent 32rem),
    radial-gradient(circle at 12% 32%, rgba(0, 255, 255, 0.11), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(0, 0, 0, 0.16) 4px);
}
a { color: var(--cyan); text-underline-offset: 0.22em; }
a:hover { color: #fff; }
.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 20;
  transform: translateY(-180%);
  background: var(--cyan);
  color: var(--bg);
  padding: 0.6rem 0.9rem;
}
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }
.shell { width: min(72rem, calc(100% - 2rem)); margin-inline: auto; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
}
.brand {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.brand span { color: var(--pink); }
nav { display: flex; flex-wrap: wrap; gap: 0.8rem; font-size: 0.85rem; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  min-height: 78vh;
  padding-block: 3rem 5rem;
}
.eyebrow {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.15; }
h1 { margin: 0.8rem 0 1.2rem; font-size: clamp(2.35rem, 7vw, 5.6rem); letter-spacing: -0.06em; }
h1 em { color: var(--pink); font-style: normal; text-shadow: 3px 3px 0 var(--cyan); }
h2 { margin-top: 0; font-size: clamp(1.75rem, 4vw, 3rem); }
.lede { max-width: 44rem; color: var(--muted); font-size: clamp(1rem, 2vw, 1.2rem); }
.notice {
  border-left: 4px solid var(--pink);
  margin-top: 1.5rem;
  padding: 0.7rem 1rem;
  background: rgba(255, 0, 110, 0.08);
  font-size: 0.86rem;
}
.game-card {
  position: relative;
  border: 2px solid var(--cyan);
  padding: clamp(1rem, 4vw, 2rem);
  background: rgba(10, 0, 20, 0.88);
  box-shadow: 12px 12px 0 var(--pink);
}
.game-card::before {
  content: "LIVE INPUT";
  position: absolute;
  top: -0.8rem;
  left: 1rem;
  padding: 0.15rem 0.55rem;
  background: var(--bg);
  color: var(--cyan);
  font-size: 0.72rem;
}
.prompt {
  min-height: 4.5rem;
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 3vw, 1.55rem);
  font-weight: 700;
}
.wave-wrap {
  display: grid;
  place-items: center;
  min-height: 10rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #06000d;
}
canvas { display: block; width: 100%; height: 160px; }
.status { min-height: 1.8em; margin: 0.8rem 0; color: var(--cyan); font-size: 0.86rem; }
.status.error { color: #ff80b7; }
.controls { display: flex; flex-wrap: wrap; gap: 0.7rem; }
button, .button {
  appearance: none;
  border: 2px solid var(--cyan);
  min-height: 2.85rem;
  padding: 0.6rem 0.9rem;
  background: transparent;
  color: var(--ink);
  font: 700 0.78rem/1 var(--font);
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
}
button.primary { border-color: var(--pink); background: var(--pink); color: var(--bg); }
button:hover:not(:disabled), .button:hover { background: var(--cyan); color: var(--bg); }
button:disabled { cursor: not-allowed; opacity: 0.42; }
audio { width: 100%; margin-top: 1rem; accent-color: var(--pink); }
.hidden { display: none; }
section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.panel {
  border: 1px solid var(--line);
  padding: 1.4rem;
  background: rgba(21, 5, 34, 0.66);
}
.panel strong { display: block; margin-bottom: 0.5rem; color: var(--pink); font-size: 1.15rem; }
.steps { counter-reset: steps; list-style: none; padding: 0; }
.steps li { counter-increment: steps; display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; margin-block: 1.6rem; }
.steps li::before { content: "0" counter(steps); color: var(--cyan); font-weight: 800; font-size: 1.3rem; }
.faq details { border-top: 1px solid var(--line); padding-block: 1rem; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 700; }
footer { border-top: 1px solid var(--line); padding-block: 2rem; color: var(--muted); font-size: 0.8rem; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 2rem; }
  .grid { grid-template-columns: 1fr; }
  header { align-items: flex-start; flex-direction: column; }
  h1 { font-size: clamp(2.25rem, 14vw, 4.5rem); }
  .game-card { box-shadow: 7px 7px 0 var(--pink); }
}
@media (max-width: 380px) {
  .shell { width: min(100% - 1rem, 72rem); }
  .controls > * { width: 100%; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  body::after { display: none; }
}