:root {
  --bg: #07080c;
  --bg-2: #0e1018;
  --line: rgba(255, 255, 255, 0.09);
  --text: #e9ecf3;
  --muted: #9aa3b5;
  --dim: #6f788b;
  --gold: #f2dc5d;
  --gold-deep: #c9a92c;
  --cyan: #74e3ea;
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--cyan); }
code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 6px;
}
.eyebrow {
  display: block;
  font-family: Silkscreen, monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  font: 600 16px/1.2 Inter, sans-serif;
  text-decoration: none;
  padding: 16px 26px;
  border-radius: 10px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn svg { width: 22px; height: 22px; flex: none; }
.btn-primary {
  color: #1d1606;
  background: linear-gradient(180deg, #fbe978, var(--gold) 55%, var(--gold-deep));
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.6), 0 12px 32px -12px rgba(242, 220, 93, .6);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: inset 0 -3px 0 rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.6), 0 16px 38px -12px rgba(242, 220, 93, .8); }
.btn-block { width: 100%; justify-content: flex-start; padding: 18px 22px; font-size: 18px; }
.btn-block small { display: block; margin-top: 3px; font: 500 12px/1.2 ui-monospace, Consolas, monospace; color: rgba(29, 22, 6, .65); }

/* launch: download on the left, Io bleeding off the right edge */
.launch {
  position: relative;
  min-height: min(100vh, 980px);
  display: grid;
  grid-template-columns: minmax(420px, 520px) 1fr;
}
.launch-art { position: relative; grid-column: 2; overflow: hidden; }
.launch-art img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 40% center; }
.launch-art::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, var(--bg) 0%, rgba(7,8,12,.55) 18%, rgba(7,8,12,0) 45%),
    linear-gradient(0deg, rgba(7,8,12,.6), rgba(7,8,12,0) 30%);
}
.launch-panel {
  grid-column: 1; grid-row: 1;
  display: flex; flex-direction: column; justify-content: center;
  padding: 40px 48px 48px 56px;
  position: relative; z-index: 1;
}
.mini-nav { position: absolute; top: 28px; left: 56px; display: flex; gap: 24px; }
.mini-nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.mini-nav a:hover { color: var(--text); }
.logo { margin: 40px 0 22px; }
.logo img { width: 100%; height: auto; filter: drop-shadow(0 10px 24px rgba(0,0,0,.6)); }
.lede { margin: 0 0 32px; color: #c7cdd9; font-size: 17px; }

.release { border-top: 1px solid var(--line); padding-top: 20px; margin-bottom: 16px; }
.release-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.release-row strong { font-size: 22px; letter-spacing: -0.01em; }
.release-row span { color: var(--muted); font-size: 14px; }

.alt-link { display: inline-block; margin: 14px 0 28px; font-size: 14px; text-decoration: none; color: var(--muted); }
.alt-link:hover { color: var(--text); }

.server {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  border: 1px solid rgba(116, 227, 234, .25);
  background: rgba(116, 227, 234, .05);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.server code { display: block; margin-top: 2px; font-size: 17px; color: var(--text); background: none; border: 0; padding: 0; }
.btn-copy {
  font: 600 14px/1 Inter, sans-serif; cursor: pointer;
  padding: 11px 18px; border-radius: 8px;
  color: var(--cyan); background: rgba(116, 227, 234, .1); border: 1px solid rgba(116, 227, 234, .35);
}
.btn-copy:hover { background: rgba(116, 227, 234, .18); }
.btn-copy.copied { color: #0b1f20; background: var(--cyan); }

/* tour: single viewer with caption, filmstrip underneath */
.tour { max-width: 1280px; margin: 0 auto; padding: 120px 40px 80px; }
.tour-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 28px; }
.tour-head h2 { margin: 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.1; letter-spacing: -0.02em; }

.viewer { display: grid; grid-template-columns: 1fr 300px; gap: 36px; align-items: end; }
.stage {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: #000;
  aspect-ratio: 1536 / 803;
  box-shadow: 0 40px 90px -40px rgba(0,0,0,.9);
}
.stage img { width: 100%; height: 100%; object-fit: cover; transition: opacity .25s ease; }
.stage img.fading { opacity: 0; }
.nav-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2); background: rgba(7,8,12,.55); color: var(--text);
  font-size: 28px; line-height: 1; cursor: pointer;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; transition: opacity .2s ease, background .2s ease;
}
.stage:hover .nav-btn, .nav-btn:focus-visible { opacity: 1; }
.nav-btn:hover { background: rgba(7,8,12,.8); }
.prev { left: 16px; } .next { right: 16px; }
.counter {
  position: absolute; left: 16px; bottom: 14px;
  font-family: Silkscreen, monospace; font-size: 12px; letter-spacing: .08em;
  padding: 5px 10px; border-radius: 6px; background: rgba(7,8,12,.65);
}
.caption h3 { margin: 8px 0 12px; font-size: 32px; line-height: 1.1; letter-spacing: -0.02em; }
.caption p { margin: 0; color: var(--muted); font-size: 16px; }

.strip { list-style: none; margin: 22px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.strip button {
  width: 100%; padding: 0; cursor: pointer; text-align: left;
  background: none; border: 0; color: var(--muted);
  font: 500 13px/1.3 Inter, sans-serif;
}
.strip img {
  width: 100%; aspect-ratio: 16 / 9; object-fit: cover;
  border-radius: 8px; border: 2px solid transparent;
  opacity: .5; transition: opacity .2s ease, border-color .2s ease;
}
.strip span { display: block; margin-top: 8px; }
.strip button:hover img { opacity: .85; }
.strip button[aria-selected="true"] { color: var(--text); }
.strip button[aria-selected="true"] img { opacity: 1; border-color: var(--gold); }

/* install band */
.install {
  max-width: 1280px; margin: 0 auto 80px; padding: 36px 40px;
  display: grid; grid-template-columns: 200px 1fr auto; gap: 40px; align-items: center;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.install-title { margin: 0; font-size: 22px; line-height: 1.25; letter-spacing: -0.01em; }
.install-title .eyebrow { margin-bottom: 6px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.steps li { display: flex; gap: 14px; }
.steps b {
  flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 7px;
  font: 14px Silkscreen, monospace; color: #1d1606; background: var(--gold);
}
.steps h3 { margin: 2px 0 4px; font-size: 16px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

.footer { padding: 0 24px 48px; text-align: center; }
.footer p { margin: 0 auto; max-width: 560px; color: var(--dim); font-size: 13px; }

/* responsive */
@media (max-width: 1080px) {
  .viewer { grid-template-columns: 1fr; gap: 20px; }
  .install { grid-template-columns: 1fr; gap: 24px; }
  .install .btn { justify-self: start; }
}
@media (max-width: 860px) {
  .launch { grid-template-columns: 1fr; min-height: 0; }
  .launch-art { grid-column: 1; grid-row: 1; height: 42vh; min-height: 220px; }
  .launch-art::after { background: linear-gradient(0deg, var(--bg) 0%, rgba(7,8,12,0) 60%); }
  .launch-panel { grid-row: 2; padding: 0 16px 40px; margin-top: -70px; }
  .mini-nav { position: absolute; top: calc(-42vh + 70px + 16px); left: 16px; }
  .logo { margin: 0 0 18px; }
  .tour { padding: 72px 16px 56px; }
  .tour-head { flex-direction: column; gap: 6px; }
  .strip { grid-template-columns: repeat(5, 120px); overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
  .strip li { scroll-snap-align: start; }
  .nav-btn { opacity: 1; width: 38px; height: 38px; font-size: 24px; }
  .steps { grid-template-columns: 1fr; gap: 18px; }
  .install { padding: 32px 16px; margin-bottom: 56px; }
}
@media (max-width: 860px) and (max-height: 520px) {
  .mini-nav { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stage img { transition: none; }
}