/* Breathe: night. One deep blue page in light and dark alike (it is used at bedtime), a pale moon-coloured circle
   that fills as you breathe in, and nothing else that moves. */
:root { --night: #0f1b2d; --deep: #16263f; --ink: #eef3fb; --soft: #a9b8d0; --line: #2a3d5c; --moon: #f3e9c9; --on-moon: #1a2233; --stop: #ffb4a8; color-scheme: dark; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--night); color: var(--ink); font: 400 17px/1.5 "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif; font-variant-numeric: tabular-nums; }
main { max-width: 560px; margin: 0 auto; padding: max(20px, env(safe-area-inset-top)) 16px max(32px, env(safe-area-inset-bottom)); display: grid; gap: 34px; grid-template-columns: minmax(0, 1fr); }
section { display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--moon); outline-offset: 2px; }
h1 { font-size: 30px; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: 22px; margin: 0; }
p { margin: 0; }
.top p, .soft, .about { color: var(--soft); }
.top p { margin-top: 6px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }

.stage { position: relative; width: min(100%, 300px); aspect-ratio: 1; justify-self: center; display: grid; place-items: center; }
.ring { position: absolute; inset: 0; border-radius: 50%; border: 2px solid var(--line); display: grid; place-items: center; }
.lung { width: 100%; height: 100%; border-radius: 50%; background: radial-gradient(circle at 38% 34%, #fff8de, var(--moon) 60%, #d8cba2); transform: scale(0.42); will-change: transform; }
.cue { position: relative; text-align: center; color: var(--on-moon); display: grid; gap: 2px; padding: 0 12px; }
.word { font-size: 21px; font-weight: 700; line-height: 1.15; }
.count { font-size: 40px; font-weight: 800; line-height: 1; min-height: 40px; }
.about { text-align: center; min-height: 3em; max-width: 40ch; justify-self: center; }
fieldset { border: 0; padding: 0; margin: 0; }
legend { font-weight: 600; font-size: 15px; padding: 0; margin: 0 0 8px; color: var(--soft); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { min-height: 44px; padding: 0 14px; border-radius: 999px; border: 1.5px solid var(--line); background: transparent; font-weight: 600; font-size: 15px; }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--night); }
.chip:disabled { opacity: .5; cursor: default; }
#go { justify-self: center; min-width: 200px; min-height: 54px; border: 0; border-radius: 999px; background: var(--moon); color: var(--on-moon); font-weight: 700; font-size: 18px; }
#go.stop { background: transparent; color: var(--stop); border: 2px solid var(--stop); }

.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.tile { text-align: left; display: grid; gap: 4px; align-content: start; padding: 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--deep); min-height: 120px; }
.tile b { font-size: 18px; }
.tile span { color: var(--soft); font-size: 14px; }
.tile i { font-style: normal; font-size: 13px; font-weight: 600; margin-top: 4px; }
.tile[aria-pressed="true"] { border-color: var(--moon); box-shadow: inset 0 0 0 1px var(--moon); }
.tile[aria-pressed="true"] i { color: var(--moon); }
audio { display: none; }
footer { font-size: 14px; color: var(--soft); display: grid; gap: 8px; }
footer a { display: inline-block; padding: 4px 0; }
.noscript { padding: 16px; }
.doc { max-width: 68ch; display: block; } .doc h1 { margin: 16px 0; } .doc h2 { font-size: 20px; margin: 24px 0 8px; } .doc p, .doc ul { margin: 0 0 12px; }
@media (max-width: 360px) { .tiles { grid-template-columns: minmax(0, 1fr); } .tile { min-height: 0; } }