:root { color-scheme: dark; --fg: rgba(255,255,255,.86); --dim: rgba(255,255,255,.5); --line: rgba(255,255,255,.16); }
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: #000; color: var(--fg); font: 13px/1.6 ui-monospace, 'SF Mono', Menlo, Consolas, monospace; padding: 72px 16px 56px; }
main { width: min(100%, 520px); margin: auto; }
.home { position: absolute; top: 14px; left: 14px; color: var(--dim); text-decoration: none; padding: 7px 11px; letter-spacing: .18em; font-size: 11px; }
h1 { font-size: 17px; font-weight: 400; letter-spacing: .06em; margin: 0 0 8px; }
.intro, .notes { color: var(--dim); font-size: 12px; }
.hero { margin: 32px 0; }
.frequency { display: flex; align-items: baseline; gap: 10px; }
.frequency input { width: 4.7em; font-size: 52px; font-weight: 300; border: 0; border-bottom: 1px solid var(--line); text-align: right; padding: 0; }
input, select, button { font: inherit; color: inherit; background: #080808; border: 1px solid var(--line); border-radius: 0; }
input[type=number] { min-width: 0; padding: 9px; }
input[type=range] { width: 100%; accent-color: #ddd; min-height: 40px; margin: 0; }
button, select { min-height: 44px; padding: 8px 12px; }
button { cursor: pointer; }
button:hover { background: #202020; }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 1px solid #fff; outline-offset: 3px; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.start { width: 100%; font-size: 16px; margin: 8px 0; }
fieldset { border: 1px solid var(--line); padding: 16px; margin: 20px 0; }
legend { color: var(--dim); padding: 0 8px; }
.row { display: grid; grid-template-columns: 110px minmax(0,1fr) 62px; align-items: center; gap: 12px; margin: 12px 0; }
.row output { text-align: right; color: var(--dim); }
.row select, .row input[type=number] { grid-column: 2 / -1; width: 100%; }
.status { min-height: 22px; color: var(--dim); }
.channels { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.bands { display: flex; gap: 4px; margin: 20px 0; }
.bands button { flex: 1; min-width: 0; padding: 8px 2px; font-size: 11px; }
.bands button[aria-pressed=true] { background: #ddd; color: #000; }
.band-detail { min-height: 136px; border-top: 1px solid var(--line); margin-top: 20px; }
h2 { font-size: 16px; font-weight: 400; }
.try-links { display: flex; flex-wrap: wrap; gap: 16px; margin: 24px 0; }
a { color: #ccc; }
dl { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; border: 1px solid var(--line); padding: 20px; }
dt { color: var(--dim); }
dd { margin: 0; text-align: right; }
.warning { color: #e0b354; border: 1px solid #735e34; padding: 16px; }
dialog { background: #090909; color: var(--fg); border: 1px solid #e0b354; width: min(440px, calc(100% - 32px)); padding: 24px; }
dialog::backdrop { background: rgba(0,0,0,.9); }
.actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 24px; }
#stage { position: fixed; inset: 0; z-index: 10; background: #000; touch-action: none; }
#light-layer { position: absolute; inset: 0; background: #fff; opacity: 0; }
#stage p { position: absolute; bottom: 24px; width: 100%; text-align: center; background: #000; padding: 12px; color: #fff; }
@media (max-width: 380px) { .row { grid-template-columns: 85px minmax(0,1fr) 48px; gap: 8px; } .frequency input { font-size: 44px; } }