/* Rain Sounds — the sound pages (/brown-noise/, /rain-on-tin-roof/ …) and the /sounds/ hub */
:root {
  color-scheme: dark;
  --bg: #04121b; --ink: #e6f0f2; --soft: rgba(230,240,242,.78); --faint: rgba(230,240,242,.56);
  --line: rgba(255,255,255,.14); --glass: rgba(9,28,38,.62); --accent: #8edee6; --accent-ink: #04121b;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--ink); font: 16px/1.6 Inter, system-ui, sans-serif; }
a { color: var(--accent); text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; inset-inline-start: 12px; top: -48px; z-index: 10; background: #fff; color: #000; padding: 8px 12px; border-radius: 8px; }
.skip:focus { top: 12px; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 1080px; margin: 0 auto; padding: 18px 20px; position: relative; z-index: 2; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.brand img { width: 28px; height: 28px; border-radius: 8px; }
.top nav { display: flex; gap: 18px; font-size: 15px; }
.top nav a { color: var(--soft); text-decoration: none; }
.top nav a:hover { color: var(--ink); }

.hero { position: relative; isolation: isolate; overflow: hidden; margin-top: -64px; padding-top: 64px; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(4,18,27,.55) 0%, rgba(4,18,27,.72) 55%, var(--bg) 100%); }
.hero-in { max-width: 1080px; margin: 0 auto; padding: 56px 20px 40px; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 40px; align-items: start; }
.crumbs { font-size: 14px; color: var(--faint); margin: 0 0 14px; }
.crumbs a { color: var(--soft); }
h1 { font-family: 'Inter Tight', Inter, sans-serif; font-size: clamp(2rem, 1.2rem + 3vw, 3.2rem); line-height: 1.08; letter-spacing: -.025em; margin: 0 0 18px; }
.answer { font-size: 1.12rem; color: var(--ink); max-width: 36em; margin: 0 0 14px; }
.answer + p { color: var(--soft); max-width: 36em; }

.player { background: var(--glass); border: 1px solid var(--line); border-radius: 22px; padding: 20px; backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.play { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; min-height: 58px; border: 0; border-radius: 999px; cursor: pointer;
  background: var(--accent); color: var(--accent-ink); font: 700 1.1rem Inter, sans-serif; }
.play svg { width: 22px; height: 22px; fill: currentColor; }
.player.is-playing .play { background: #fff; }
.layers { list-style: none; margin: 18px 0 6px; padding: 0; display: grid; gap: 12px; }
.layers label, .row label { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 10px; font-size: 14px; color: var(--soft); }
.layers label b { color: var(--ink); font-weight: 600; }
.layers output { font-variant-numeric: tabular-nums; color: var(--faint); }
input[type=range] { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); height: 24px; margin: 0; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--soft); }
.row .vol { flex: 1 1 160px; }
select, .ghost { font: 500 14px Inter, sans-serif; color: var(--ink); background: rgba(255,255,255,.08); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; min-height: 40px; }
.ghost { cursor: pointer; }
.full { display: block; margin-top: 14px; font-size: 14px; text-align: center; }
.free-note { margin: 10px 0 0; font-size: 13px; color: var(--accent); text-align: center; }
.state { min-height: 1.4em; margin: 8px 0 0; font-size: 13px; color: var(--faint); text-align: center; }

main.body { max-width: 760px; margin: 0 auto; padding: 8px 20px 72px; }
main.body h2 { font-family: 'Inter Tight', Inter, sans-serif; font-size: 1.45rem; letter-spacing: -.015em; margin: 44px 0 12px; }
main.body p, main.body li { color: var(--soft); }
main.body ul { padding-inline-start: 1.2em; }
.faq dt { color: var(--ink); font-weight: 600; margin-top: 18px; }
.faq dd { margin: 6px 0 0; color: var(--soft); }
.src { font-size: 13px; color: var(--faint); }
main.body .related, .related { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; padding: 0; list-style: none; }
.related a { display: block; height: 100%; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--ink); background: rgba(255,255,255,.04); }
.related a:hover { background: rgba(255,255,255,.08); }
.related small { display: block; color: var(--faint); margin-top: 2px; }

.hub { max-width: 1080px; margin: 0 auto; padding: 24px 20px 72px; }
.hub h1 { margin-top: 24px; }
.hub section { margin-top: 36px; }
.hub h2 { font-size: 1.2rem; margin: 0 0 12px; }

footer { border-top: 1px solid var(--line); }
footer div { max-width: 1080px; margin: 0 auto; padding: 24px 20px 40px; display: flex; flex-wrap: wrap; gap: 10px 22px; font-size: 14px; color: var(--faint); }
footer a { color: var(--soft); }

.black { position: fixed; inset: 0; z-index: 50; background: #000; cursor: none; }
.black p { position: absolute; bottom: 24px; width: 100%; text-align: center; color: #333; font-size: 13px; margin: 0; }

@media (max-width: 820px) {
  .hero-in { grid-template-columns: 1fr; gap: 24px; padding-top: 32px; }
  .top nav { gap: 14px; font-size: 14px; }
}
@media (max-width: 420px) {
  .top nav a.opt { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

/* text pages: credits, privacy, 404 */
.doc { max-width: 720px; margin: 0 auto; padding: 24px 20px 72px; }
.doc h1 { margin-top: 24px; }
.doc h2 { font-size: 1.2rem; margin: 36px 0 10px; }
.doc p, .doc li { color: var(--soft); }
.doc ul { padding-inline-start: 1.2em; margin: 0; }
.doc li { margin: 0 0 10px; overflow-wrap: anywhere; }

/* noise colour buttons (the noise colours article) */
.picks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 14px 0 0; }
.picks button { font: 600 14px Inter, sans-serif; color: var(--ink); background: rgba(255,255,255,.08); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; min-height: 40px; cursor: pointer; }
.picks button:hover { background: rgba(255,255,255,.14); }
.picks button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* the same page in other languages, in the footer */
.langs { max-width: 1080px; margin: -24px auto 0; padding: 0 20px 40px; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 14px; }
.langs a { color: var(--soft); }
.langs a[aria-current="page"] { color: var(--ink); font-weight: 600; text-decoration: none; }

/* Right-to-left, CJK and Indian scripts: no tight letter-spacing (it breaks joined Arabic letters), more room between lines */
[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] .brand, :is(:lang(ja), :lang(zh), :lang(ko), :lang(hi), :lang(bn), :lang(mr), :lang(te)) :is(h1, h2) { letter-spacing: 0; }
[dir="rtl"] h1, :is(:lang(ja), :lang(zh), :lang(ko), :lang(hi), :lang(bn), :lang(mr), :lang(te)) h1 { line-height: 1.3; }
[dir="rtl"] body { line-height: 1.8; }

/* Storm look, the homepage's default theme: the hubs, credits, privacy and 404 sit on the same monsoon storm
   picture the app opens on (rs-41), fading into the dark so long text stays easy to read. */
body:has(> main.hub)::before, body:has(> main.doc)::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(180deg, rgba(4,18,27,.58) 0%, rgba(4,18,27,.76) 40%, rgba(4,18,27,.94) 75%, var(--bg) 100%),
              url(/assets/pages/rs-41.webp) center top / cover no-repeat, var(--bg);
}
@media (max-width: 900px) {
  body:has(> main.hub)::before, body:has(> main.doc)::before {
    background: linear-gradient(180deg, rgba(4,18,27,.58) 0%, rgba(4,18,27,.76) 40%, rgba(4,18,27,.94) 75%, var(--bg) 100%),
                url(/assets/pages/rs-41-900.webp) center top / cover no-repeat, var(--bg);
  }
}
.hub .related a, .body .related a { background: var(--glass); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.hub .related a:hover, .body .related a:hover { background: rgba(14,40,52,.75); }
.hub h1, .doc h1 { text-shadow: 0 2px 18px rgba(0,0,0,.45); }

/* top bar on narrow screens: the name never breaks; longer menu words (other languages) wrap as whole links */
.brand { white-space: nowrap; flex-shrink: 0; }
.top nav { flex-wrap: wrap; justify-content: flex-end; row-gap: 4px; }
.top nav a { white-space: nowrap; }
@media (max-width: 520px) { .top nav { gap: 4px 14px; font-size: 14px; } }