:root {
  --air: #e7f6f8;
  --cyan: #39b6c4;
  --cyan-2: #1d7f8a;
  --fire: #c1121f;
  --ink: #16333a;
  --mute: #5b7378;
  --display: "Manrope", "Noto Sans SC", sans-serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 70px; }
body {
  margin: 0;
  background: var(--air);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--cyan-2); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
label { display: block; font-size: 13px; color: var(--mute); margin: 8px 0; }
input[type="range"] { width: min(280px, 100%); accent-color: var(--cyan); }
.gauze-grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.18;
  background-image: url("images/texture.webp");
  background-size: 280px auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--cyan); color: #fff; padding: 8px; }
.o2-mast {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: #fff;
  border-bottom: 1px solid #c5e4e8;
}
.brand { font-family: var(--display); font-weight: 800; font-size: 20px; }
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mute);
  font-weight: 500;
}
.nav-toggle { display: none; background: var(--cyan); color: #fff; border: 0; border-radius: 999px; padding: 6px 14px; font-weight: 700; }
.cannula-links { display: flex; gap: 14px; font-size: 14px; flex-wrap: wrap; align-items: center; }
.cannula-links a { color: var(--mute); }
.cannula-links a.is-active, .cannula-links a:hover { color: var(--cyan-2); }
.cannula-links .live { background: var(--cyan); color: #fff; padding: 6px 14px; border-radius: 999px; font-weight: 700; }
.room {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: calc(100vh - 64px);
}
.room img { width: 100%; height: 100%; object-fit: cover; min-height: 100%; }
.copy { padding: 8vh 36px; background: #fff; }
.kicker { font-family: var(--mono); letter-spacing: 0.14em; font-size: 11px; color: var(--cyan-2); margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--display); margin: 0 0 12px; line-height: 1.15; letter-spacing: -0.03em; }
h1 { font-size: clamp(30px, 4.2vw, 46px); }
h2 { font-size: clamp(22px, 2.8vw, 34px); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; border-radius: 999px; font-size: 14px; font-weight: 700; }
.btn.cyan { background: var(--cyan); color: #fff; }
.btn.ghost { border: 1px solid var(--cyan-2); color: var(--cyan-2); }
.wrap { width: min(1000px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0; }
.pills { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin-top: 18px; }
.pills article { background: #fff; border-radius: 24px; padding: 16px; }
.pills ul { margin: 0; padding-left: 1.1em; }
.shot { margin: 20px 0 0; }
.shot img { width: 100%; height: 280px; object-fit: cover; border-radius: 20px; }
.shot figcaption { font-size: 13px; color: var(--mute); margin-top: 8px; }
.lamp {
  width: min(280px, 100%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 42%, #fff 0 36%, #fde8ea 36%);
  border: 10px solid var(--fire);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  margin: 16px 0;
}
.lamp.is-ok { border-color: var(--cyan); background: radial-gradient(circle at 50% 42%, #fff 0 36%, #dff6f8 36%); }
.n { font-family: var(--display); font-size: 52px; margin: 0; color: var(--fire); line-height: 1; }
.lamp.is-ok .n { color: var(--cyan-2); }
.n span { font-size: 16px; color: var(--mute); }
#pct-state { font-size: 13px; max-width: 18em; }
#rules ol { background: #fff; padding: 16px 16px 16px 36px; border-left: 6px solid var(--fire); max-width: 46em; }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.io > div { background: #fff; border-radius: 20px; padding: 16px; }
.url { margin-top: 18px; font-family: var(--mono); font-size: 13px; }
footer { padding: 16px 24px 40px; color: var(--mute); font-size: 13px; }
@media (max-width: 900px) {
  .room, .pills, .io { grid-template-columns: 1fr; }
  .room img { min-height: 42vh; height: 42vh; }
  .nav-toggle { display: inline-block; }
  .o2-mast { flex-wrap: wrap; }
  .cannula-links { display: none; width: 100%; flex-direction: column; padding: 8px 0; }
  .cannula-links.open { display: flex; }
}