:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--app-platform-bg:#fff;--app-platform-fg:#1d1d1f;--app-platform-muted:#1d1d1f8c;--app-platform-border:#1d1d1f1f;--app-platform-active-bg:#1d1d1f14}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--app-platform-bg:#1c1c21;--app-platform-fg:#f5f5f7;--app-platform-muted:#f5f5f78c;--app-platform-border:#f5f5f724;--app-platform-active-bg:#f5f5f724}.app-platform-header{z-index:10;padding-top:env(safe-area-inset-top,0px);background:var(--app-platform-bg);color:var(--app-platform-fg);border-bottom:1px solid var(--app-platform-border);position:sticky;top:0}.app-platform-header-inner{align-items:center;gap:10px;height:44px;padding:0 12px 0 16px;display:flex}.app-platform-brand{color:inherit;flex-shrink:0;font-weight:600;text-decoration:none}.app-platform-app-name{white-space:nowrap;text-overflow:ellipsis;min-width:0;color:var(--app-platform-muted);flex:1;overflow:hidden}.app-platform-theme{border:1px solid var(--app-platform-border);border-radius:8px;flex-shrink:0;gap:2px;margin-left:auto;padding:2px;display:flex}.app-platform-theme-btn{width:34px;height:26px;color:var(--app-platform-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;place-items:center;padding:0;display:grid}.app-platform-theme-btn[aria-pressed=true]{background:var(--app-platform-active-bg);color:var(--app-platform-fg)}.app-platform-theme-btn:focus-visible{outline:2px solid var(--app-platform-fg);outline-offset:1px}*{box-sizing:border-box}body{color:var(--ink);background:var(--page);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,sans-serif;line-height:1.5}button,input,select,textarea{font:inherit}button,select,input[type=range]{cursor:pointer}button,.file-button{border:1px solid var(--line);background:var(--panel);min-height:44px;color:var(--ink);border-radius:8px;padding:9px 14px;font-size:13px;font-weight:550;transition:background .15s,border-color .15s}button:hover,.file-button:hover{border-color:var(--accent)}button:disabled{opacity:.38;cursor:default}button.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}button[aria-pressed=true]{border-color:var(--accent);background:var(--tint)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}input[type=text],input[type=number],textarea,select{border:1px solid var(--line);background:var(--panel);min-height:44px;color:var(--ink);border-radius:7px;max-width:100%;padding:10px 12px}input[type=range]{width:100%;accent-color:var(--accent);min-height:32px;margin:0}textarea{resize:vertical;width:100%;line-height:1.7}h1,h2,h3,p{margin:0}.eyebrow{letter-spacing:.17em;text-transform:uppercase;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px}.muted{color:var(--muted);font-size:12px}.actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.panel{border:1px solid var(--line);background:var(--panel);border-radius:12px}.field{gap:6px;display:grid}.field>span,.field>label{color:var(--muted);justify-content:space-between;gap:8px;font-size:12px;display:flex}.section-label{justify-content:space-between;align-items:center;margin-bottom:12px;font-size:12px;font-weight:650;display:flex}#language-select{width:auto;min-width:70px;max-width:112px;height:30px;min-height:30px;color:var(--app-platform-fg);border-color:var(--app-platform-border);background:0 0;margin-inline-start:auto;padding:0 4px;font-size:11px}.app-platform-header .app-platform-theme{margin-inline-start:0}.app-platform-theme-btn{min-height:26px}.app-platform-header-inner{gap:8px}.app-platform-app-name{font-size:12px}#status{bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:50;border:1px solid var(--accent);background:var(--panel);width:max-content;max-width:min(90vw,540px);color:var(--ink);opacity:0;pointer-events:none;border-radius:10px;padding:12px 18px;font-size:13px;transition:opacity .2s,transform .2s;position:fixed;left:50%;transform:translate(-50%,14px);box-shadow:0 8px 35px #0002}#status.visible{opacity:1;transform:translate(-50%)}#status.error{border-color:#c85a4c}dialog{border:1px solid var(--line);background:var(--panel);width:min(90vw,480px);color:var(--ink);border-radius:14px;padding:24px}dialog::backdrop{background:#0007}dialog h2{margin-bottom:20px;font-size:17px}dialog textarea{min-height:140px;margin-bottom:14px}dialog .actions{justify-content:flex-end}.file-button{cursor:pointer;align-items:center;display:inline-flex}.file-button:focus-within{outline:2px solid var(--accent);outline-offset:3px}.file-button input{opacity:0;width:1px;height:1px;position:absolute}@media (width<=380px){.app-platform-app-name{display:none}.app-platform-theme-btn{width:29px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}canvas,input[type=number],input[type=range],progress,[role=progressbar]{direction:ltr}input[type=text],textarea{unicode-bidi:plaintext}.app-platform-app-name{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}#language-select{flex-shrink:1}.app-platform-theme{flex-shrink:0}#encoded,#challenge-code,.reference-grid code{text-align:left;direction:ltr;unicode-bidi:isolate}:root{--page:#f0f2eb;--panel:#fcfdf8;--ink:#29392f;--muted:#75816e;--line:#d6dfce;--accent:#49623d;--accent-ink:#f8faef;--tint:#e7eedc}:root[data-theme=dark]{--page:#17201a;--panel:#222d24;--ink:#e3eadb;--muted:#a3b19b;--line:#3d4b38;--accent:#c5df91;--accent-ink:#233017;--tint:#34452c}.radio-app{max-width:1180px;margin:auto;padding:28px 28px 32px}.intro{margin-bottom:20px}h1{letter-spacing:-.025em;font:500 clamp(26px,3.4vw,32px)/1.3 Georgia,Songti SC,serif}.intro p{color:var(--muted);margin-top:8px;font-size:12px}.converter-tabs{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.converter-tabs button{white-space:normal;overflow-wrap:anywhere;background:0 0;min-height:48px;padding:10px 20px;font-size:13px}.converter-tabs button span{opacity:.6;margin-inline:8px}.converter-tabs button[aria-pressed=true]{color:var(--accent-ink);background:var(--accent);border-color:var(--accent)}.converter{scroll-margin-top:65px;overflow:hidden}.converter-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:18px;padding:14px 24px;display:flex}.converter-heading h2{overflow-wrap:anywhere;font-size:15px;font-weight:600}.converter-heading h2 span{color:var(--muted);margin-inline:10px;font-weight:400;display:inline-block}.converter-heading p{color:var(--muted);font-size:11px}.conversion-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);display:grid}.text-panel{flex-direction:column;min-width:0;padding:16px 24px 20px;display:flex}.encoded-panel{border-left:1px solid var(--line);background:color-mix(in srgb, var(--tint) 28%, var(--panel))}.editor-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.editor-heading h3{font-size:13px;font-weight:600}.editor-tools{gap:4px;display:flex}.editor-tools button{min-height:44px;color:var(--muted);background:0 0;border-color:#0000;padding:8px 10px;font-size:11px}.editor-tools button:hover{border-color:var(--line);color:var(--ink)}.text-panel textarea{background:var(--panel);border:1px solid var(--line);height:200px;min-height:200px;padding:16px;font-size:16px;line-height:1.9}#encoded{letter-spacing:.07em;color:var(--accent);font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.text-panel textarea[aria-invalid=true]{border-color:#b45f50}.editor-meta{color:var(--muted);justify-content:flex-end;padding-block:6px;font:10px ui-monospace,monospace;display:flex}.field-error{color:#b45f50;margin:0 0 10px;font-size:11px}:root[data-theme=dark] .field-error{color:#e4a18c}.convert-button{justify-content:center;align-items:center;gap:10px;width:100%;min-height:46px;margin-top:6px;font-size:13px;display:flex}.converter-footer{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:8px;padding:13px 24px;font-size:10px;display:flex}.audio-panel{margin-top:16px;padding:18px 24px}.audio-title{align-items:center;gap:9px;margin-bottom:12px;display:flex}.audio-title h2{font-size:12px;font-weight:600}.audio-title .muted{margin-left:auto;font-size:11px}.signal-led{background:var(--muted);border-radius:50%;width:7px;height:7px}.signal-led.active{background:#abd264;box-shadow:0 0 8px #abd26488}.audio-controls{align-items:center;gap:24px;display:flex}.audio-controls>button{min-width:100px}.speed-control{flex:1;gap:2px;min-width:100px;max-width:260px;display:grid}.speed-control span{color:var(--muted);font-size:10px}.speed-control input{min-height:28px}progress{width:100%;max-width:300px;height:5px;accent-color:var(--accent);margin-left:auto}.auxiliary-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:16px;margin-top:18px;display:grid}.aux-panel{min-width:0;padding-inline:22px}.aux-panel summary{cursor:pointer;justify-content:space-between;align-items:center;min-height:56px;font-size:12px;list-style:none;display:flex}.aux-panel summary::-webkit-details-marker{display:none}.aux-panel summary>span{color:var(--muted);font-size:18px}.aux-panel[open] summary>span{transform:rotate(45deg)}.reference-grid{background:var(--line);border:1px solid var(--line);grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:1px;margin-bottom:22px;display:grid}.reference-grid>div{background:var(--panel);justify-content:space-between;align-items:center;gap:10px;padding:11px;display:flex}.reference-grid span{font-size:13px}.reference-grid code{color:var(--muted);overflow-wrap:anywhere;font-size:10px}.share-content{gap:14px;padding:0 0 22px;display:grid}.share-content input{width:100%}.share-content>button{justify-self:start;font-size:12px}.incoming-challenge{margin-top:18px;padding:22px 24px;scroll-margin-top:65px}.aux-heading{justify-content:space-between;align-items:center;gap:14px;margin-bottom:12px;display:flex}.aux-heading h2{font-size:15px;font-weight:550}.aux-heading button{background:0 0;font-size:11px}#received-hint{margin-bottom:14px}#challenge-code{letter-spacing:.08em;min-height:100px;font:14px/1.9 ui-monospace,monospace}#answer-form{align-items:end;gap:12px;max-width:600px;margin-top:16px;display:flex}#answer-form .field{flex:1;min-width:0}#answer-form input{width:100%}#answer-state{color:var(--accent);margin-top:10px;font-size:12px}#answer-state.answer-wrong{color:#c27861}#revealed-message{border:1px solid var(--line);background:var(--tint);white-space:pre-wrap;overflow-wrap:anywhere;margin-top:12px;padding:14px}.challenge-actions{justify-content:space-between;gap:12px;margin-top:12px;display:flex}.challenge-actions button{background:0 0;font-size:11px}@media (width<=700px){.radio-app{padding:26px 14px}.intro{margin-bottom:22px}.intro p{font-size:12px}.converter-tabs button{flex:120px;min-width:120px;padding-inline:10px;font-size:12px}.converter-tabs button span{margin-inline:4px}.converter-heading{flex-direction:column;align-items:start;gap:6px;padding:16px}.conversion-grid{grid-template-columns:minmax(0,1fr)}.text-panel{padding:14px 16px 20px}.text-panel textarea{height:170px;min-height:170px}.encoded-panel{border-left:0;border-top:1px solid var(--line)}.converter-footer{padding-inline:16px}.audio-panel{padding:18px 16px}.audio-controls{flex-wrap:wrap;gap:14px}.audio-controls progress{max-width:none;margin-left:0}.auxiliary-grid{grid-template-columns:minmax(0,1fr)}.aux-panel{padding-inline:16px}.incoming-challenge{padding:18px 16px}}