:root {
  --bg: #101410;
  --surface: #1a211c;
  --fg: #f3efe4;
  --muted: #9aa396;
  --cyan: #00b6f5;
  --orange: #ff7b00;
  --violet: #9426d5;
  --line: #2c362f;
  --display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --sans: "Outfit", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; }
h1, h2, h3 { font-family: var(--display); text-wrap: balance; margin: 0; }
p { text-wrap: pretty; }
::selection { background: var(--cyan); color: var(--bg); }

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 50;
  background: var(--cyan);
  color: var(--bg);
  padding: 0.75rem 1rem;
}

.wrap { width: min(72rem, calc(100% - 2.5rem)); margin-inline: auto; }
.kicker {
  margin: 0;
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.muted { color: var(--muted); }
.lead { font-size: 1.125rem; line-height: 1.6; max-width: 28rem; }
.copy { font-size: 1rem; line-height: 1.6; max-width: 28rem; }

header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 95%, transparent);
  backdrop-filter: blur(6px);
}
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}
.logo {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}
nav { display: none; gap: 1.5rem; }
nav a { color: var(--muted); text-decoration: none; font-size: 0.875rem; }
nav a:hover { color: var(--fg); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 1.25rem;
  background: var(--cyan);
  color: var(--bg);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}
.btn.ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}
.row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.short { display: inline; }
.long { display: none; }

.hero {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  padding: 3rem 0;
}
h1 {
  margin-top: 1rem;
  font-size: clamp(3.5rem, 12vw, 6rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
h2 {
  margin-top: 0.75rem;
  font-size: clamp(2.75rem, 8vw, 3.75rem);
  font-weight: 800;
  line-height: 0.9;
  text-transform: uppercase;
}

.bottle {
  border: 1px solid var(--line);
  background: var(--surface);
}
.bottle.live { border-color: var(--cyan); }
.bottle button { position: relative; display: block; width: 100%; text-align: left; cursor: pointer; }
.bottle img, .bottle video { width: 100%; height: auto; }
.bottle video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 200ms;
}
.bottle.live img { opacity: 0; }
.bottle.live video { opacity: 1; }
.capline {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--line);
  padding: 0.75rem 1rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.5rem;
  background: var(--line);
  vertical-align: middle;
}
.bottle.live .dot { background: var(--cyan); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }

.band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 3rem 0; }
.facts { display: grid; gap: 1px; margin-top: 2.5rem; background: var(--line); }
.facts article { background: var(--bg); padding: 2rem 0.25rem; }
.num {
  margin: 0;
  color: var(--cyan);
  font-family: var(--display);
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1;
}
.facts h3, .lesson h3, .chambers h3 {
  margin-top: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
}
.note { margin-top: 2rem; max-width: 40rem; font-size: 0.875rem; line-height: 1.6; }

section { padding: 4rem 0; }
.split { display: grid; gap: 2.5rem; align-items: start; }
.panel { border: 1px solid var(--line); background: var(--surface); }
.steps { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0.75rem; border-bottom: 1px solid var(--line); }
.steps button {
  min-height: 2.75rem;
  min-width: 2.75rem;
  border: 1px solid var(--line);
  cursor: pointer;
}
.steps button.on { background: var(--cyan); color: var(--bg); border-color: var(--cyan); font-weight: 600; }
.lesson { padding: 1.5rem; }
.frame { border: 1px solid var(--line); background: var(--surface); }
.frame figcaption, .capline { }
.swatch { width: 2rem; height: 2rem; margin-top: 0.25rem; }
.cyan { background: var(--cyan); }
.orange { background: var(--orange); }
.violet { background: var(--violet); }
.chambers { list-style: none; margin: 2rem 0 0; padding: 0; border-top: 1px solid var(--line); }
.chambers li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.valley { position: relative; border-top: 1px solid var(--line); }
.valley img { width: 100%; min-height: 24rem; object-fit: cover; }
.veil { position: absolute; inset: 0; background: color-mix(in srgb, var(--bg) 75%, transparent); }
.valley .copyblock {
  position: absolute;
  inset: auto 0 0 0;
  padding: 2.5rem 0 3rem;
}
.ten {
  color: var(--cyan);
  font-family: var(--display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}

.cta { display: grid; gap: 2rem; border: 1px solid var(--line); background: var(--surface); padding: 1.5rem; }
footer { border-top: 1px solid var(--line); }
.foot {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.875rem;
}
.foot strong {
  color: var(--fg);
  font-family: var(--display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

@media (min-width: 640px) {
  .short { display: none; }
  .long { display: inline; }
  .facts article { padding: 2rem 1.5rem; }
  .facts { grid-template-columns: repeat(3, 1fr); }
  .foot { flex-direction: row; align-items: center; justify-content: space-between; }
}
@media (min-width: 768px) {
  nav { display: flex; }
  .hero, .split { grid-template-columns: 1fr 1fr; align-items: center; }
  .hero { padding: 5rem 0; }
  .lesson { padding: 2rem; }
  .cta { grid-template-columns: 1.4fr 1fr; padding: 2.5rem; align-items: end; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bottle.live .dot { animation: none; }
}