/* NoiseEngine site. Same palette as the app: dark surfaces, one green for "on". */
:root {
  --bg: #0c0d0f;
  --bg-1: #121317;
  --bg-2: #1a1b20;
  --bg-3: #22232a;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.12);
  --text: #e8eaed;
  --text-2: rgba(232, 234, 237, 0.72);
  --text-3: rgba(232, 234, 237, 0.48);
  --accent: #3dcc6e;
  --accent-rgb: 61, 204, 110;
  --accent-ink: #06210e;
  --warn: #d4a017;
  --radius: 14px;
  --display: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --body: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img { display: block; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
.muted { color: var(--text-3); }
.accent { color: var(--accent); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.25); }
.btn:active { transform: translateY(0); }
.btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.btn.is-soon { background: var(--bg-3); color: var(--text-2); cursor: default; box-shadow: none; transform: none; }
.btn-sm { padding: 7px 14px; font-size: 14px; }
.btn-lg { padding: 15px 26px; font-size: 17px; border-radius: 12px; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px max(16px, calc((100vw - 1120px) / 2));
  background: rgba(12, 13, 15, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); letter-spacing: 0.06em; font-size: 15px; }
.brand b { color: var(--accent); font-weight: 700; }
.brand img { border-radius: 7px; }
.nav nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav nav a:not(.btn) { color: var(--text-2); text-decoration: none; }
.nav nav a:not(.btn):hover { color: var(--text); }

/* Sections */
main { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.section { padding: 88px 0 0; }
.section > h2 { font-size: clamp(28px, 4vw, 40px); text-align: center; }
.sub { margin: 10px auto 40px; max-width: 560px; text-align: center; color: var(--text-2); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  gap: 56px;
  padding: 72px 0 40px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.18); }
.hero h1 { margin: 20px 0 18px; font-size: clamp(40px, 6vw, 68px); line-height: 1.02; }
.lede { max-width: 520px; font-size: 18px; color: var(--text-2); }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 32px; }
.cta-meta { font-size: 14px; color: var(--text-3); }

/* Hero art: a mini NoiseEngine */
.hero-art { position: relative; }
.hero-art::before {
  content: '';
  position: absolute;
  inset: -40px;
  background: radial-gradient(closest-side, rgba(var(--accent-rgb), 0.16), transparent 70%);
  z-index: -1;
}
.deck {
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background: linear-gradient(180deg, var(--bg-1), var(--bg));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  transform: perspective(1400px) rotateY(-8deg) rotateX(4deg);
}
.deck-top { display: flex; gap: 6px; overflow: hidden; margin-bottom: 14px; }
.chip { flex: none; padding: 5px 11px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; color: var(--text-2); background: var(--bg-2); }
.chip.is-on { border-color: var(--accent); color: var(--accent); background: rgba(var(--accent-rgb), 0.1); }
.pads { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.pad {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  animation: press 3.6s ease-in-out infinite;
  animation-delay: var(--d);
}
.pad i { position: absolute; top: 8px; left: 10px; font-style: normal; font-size: 11px; font-weight: 600; }
.pad em { position: absolute; top: 8px; right: 10px; font-style: normal; font-size: 10px; color: var(--text-3); font-family: ui-monospace, monospace; }
.pad b { font-size: clamp(26px, 3.4vw, 38px); line-height: 1; }
.pad span { font-size: 12px; color: var(--text-2); }
@keyframes press {
  0%, 12%, 100% { border-color: var(--line); background: linear-gradient(180deg, var(--bg-3), var(--bg-2)); transform: scale(1); }
  4% { border-color: var(--accent); background: rgba(var(--accent-rgb), 0.14); transform: scale(0.96); }
}
.deck-dock { display: flex; gap: 8px; margin-top: 14px; font-size: 12px; }
.deck-dock span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg-2); }
.deck-dock em { font-style: normal; margin-left: 6px; padding: 1px 7px; border-radius: 8px; color: var(--accent); background: rgba(var(--accent-rgb), 0.12); }

/* Works with */
.works { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px 22px; padding: 22px 0; border-block: 1px solid var(--line); margin-top: 40px; }
.works p { color: var(--text-3); font-size: 14px; }
.works ul { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 0; padding: 0; list-style: none; font-family: var(--display); font-weight: 500; color: var(--text-2); }

/* Feature cards */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-1); transition: border-color .2s ease, transform .2s ease; }
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.card .icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 16px; border-radius: 12px; background: var(--bg-3); font-size: 24px; }
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 15px; }

/* Live sounds */
.sounds { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.sounds > .muted { grid-column: 1 / -1; text-align: center; }
.sound {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-1);
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}
.sound:hover { border-color: var(--line-strong); background: var(--bg-2); }
.sound.is-playing { border-color: var(--accent); background: rgba(var(--accent-rgb), 0.08); }
.sound .e { flex: none; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--bg-3); font-size: 22px; }
.sound .e img { width: 28px; height: 28px; object-fit: contain; }
.sound .t { min-width: 0; }
.sound .t b { display: block; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sound .t small { color: var(--text-3); font-size: 12px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 40px 0 0; padding: 0; list-style: none; }
.steps li { position: relative; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-1); }
.steps .n { display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 14px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-family: var(--display); font-weight: 700; }
.steps h3 { font-size: 18px; margin-bottom: 6px; }
.steps p { color: var(--text-2); font-size: 15px; }

/* Download */
.dl-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 32px;
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  border-radius: 20px;
  background: radial-gradient(120% 140% at 0% 0%, rgba(var(--accent-rgb), 0.12), transparent 55%), var(--bg-1);
}
.dl-card img { border-radius: 18px; }
.dl-info h2 { font-size: 28px; text-align: left; }
.dl-version { color: var(--accent); font-weight: 600; margin-top: 2px; }
.dl-reqs { margin: 10px 0 0; padding-left: 18px; color: var(--text-2); font-size: 14px; }
.dl-actions { text-align: center; }
.dl-size { margin-top: 8px; font-size: 13px; color: var(--text-3); }
.dl-verify { margin-top: 14px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 12px; color: var(--text-2); font-size: 14px; }
.dl-verify summary { cursor: pointer; color: var(--text); }
.dl-verify p { margin-top: 8px; }
.dl-verify code, .faq code { font-family: ui-monospace, 'Cascadia Mono', monospace; font-size: 12.5px; word-break: break-all; color: var(--text); }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq h2 { margin-bottom: 28px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 4px; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--accent); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: '–'; }
.faq details p { margin-top: 10px; color: var(--text-2); }
.faq a { color: var(--accent); }

/* Footer */
.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1120px;
  margin: 96px auto 0;
  padding: 28px 16px 40px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.foot nav { display: flex; gap: 20px; }
.foot nav a { color: var(--text-2); text-decoration: none; }
.foot nav a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 48px; }
  .deck { transform: none; }
  .grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .sounds { grid-template-columns: repeat(2, 1fr); }
  .dl-card { grid-template-columns: auto 1fr; }
  .dl-actions { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .nav nav a:not(.btn) { display: none; }
  .grid, .steps, .sounds { grid-template-columns: 1fr; }
  .dl-card { grid-template-columns: 1fr; text-align: center; padding: 24px; }
  .dl-card img { margin: 0 auto; }
  .dl-info h2 { text-align: center; }
  .dl-reqs { text-align: left; }
  .section { padding-top: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pad { animation: none; }
  .btn, .card { transition: none; }
}