:root{color-scheme:light;--bg: #ffffff;--fg: #171717;--muted: #6b6b6b;--line: #dedede;--subtle: #f5f5f5;--hover: #f0f0f0;--danger: #bd2828;--radius: .25rem;--shell: 44rem}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;display:flex;flex-direction:column;min-height:100svh}h1{margin:0;font-size:24px;font-weight:600}h2{margin:0;font-size:17px;font-weight:600}p{margin:0}a{color:inherit}[hidden]{display:none!important}:focus-visible{outline:2px solid var(--fg);outline-offset:2px}button{font:inherit;color:var(--bg);background:var(--fg);border:1px solid var(--fg);border-radius:var(--radius);padding:10px 20px;font-weight:500;cursor:pointer}button:hover{opacity:.85}.secondary-button{color:var(--fg);background:transparent;border-color:var(--line);padding:8px 16px}.secondary-button:hover{background:var(--hover);opacity:1}.text-button{color:var(--muted);background:none;border:0;padding:0;font-size:14px;text-decoration:underline;text-underline-offset:3px}.text-button:hover{color:var(--fg);opacity:1}.hint{color:var(--muted);font-size:14px}.hint:empty{display:none}.site-header{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-top:max(16px,env(safe-area-inset-top));padding-bottom:16px;padding-left:max(20px,env(safe-area-inset-left),calc((100% - var(--shell)) / 2 + 20px));padding-right:max(20px,env(safe-area-inset-right),calc((100% - var(--shell)) / 2 + 20px));border-bottom:1px solid var(--line)}.brand{font-weight:600;text-decoration:none}.mode-nav{display:flex;gap:16px}.mode-nav a,.mode-badge{color:var(--muted);font-size:14px;text-decoration:none}.mode-nav a[aria-current=page]{color:var(--fg)}.home-shell,.send-shell,.receiver-shell{flex:1 0 auto;width:100%;max-width:var(--shell);margin:0 auto;display:flex;flex-direction:column;align-items:flex-start;gap:20px;padding:40px max(20px,env(safe-area-inset-right)) 40px max(20px,env(safe-area-inset-left))}.home-shell p{color:var(--muted);max-width:32rem}.home-links{display:flex;gap:20px}.home-links a{text-underline-offset:4px}.site-footer{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding-top:20px;padding-bottom:max(20px,env(safe-area-inset-bottom));padding-left:max(20px,env(safe-area-inset-left),calc((100% - var(--shell)) / 2 + 20px));padding-right:max(20px,env(safe-area-inset-right),calc((100% - var(--shell)) / 2 + 20px));border-top:1px solid var(--line);color:var(--muted);font-size:13px}.lang-select{font:inherit;color:var(--muted);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:2px 4px}.mode-picker{display:flex;gap:8px}.mode-picker input{position:absolute;opacity:0;pointer-events:none}.mode-picker span{display:block;border:1px solid var(--line);border-radius:var(--radius);padding:6px 14px;font-size:14px;color:var(--muted);cursor:pointer}.mode-picker input:checked+span{color:var(--bg);background:var(--fg);border-color:var(--fg)}.mode-picker input:focus-visible+span{outline:2px solid var(--fg);outline-offset:2px}.file-picker{position:relative;width:100%;display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;cursor:pointer}.file-picker-button{flex:none;color:var(--bg);background:var(--fg);border:1px solid var(--fg);border-radius:var(--radius);padding:8px 14px;font-size:14px}.file-picker.has-file .file-picker-button{color:var(--danger);background:transparent;border-color:var(--danger)}.file-picker-text{min-width:0;overflow-wrap:anywhere;color:var(--muted);font-size:14px}.file-picker input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.file-picker:has(input:focus-visible) .file-picker-button{outline:2px solid var(--fg);outline-offset:2px}.note-composer{width:100%;display:flex;flex-direction:column;gap:10px;font-size:14px}.note-composer textarea{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:12px;resize:vertical}.note-composer textarea:focus{outline:none;border-color:var(--fg)}.note-composer button{align-self:flex-start}.status-line.error{color:var(--danger)}.stage{align-self:stretch;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;justify-content:center;cursor:zoom-in}.stage canvas{max-width:100%;height:auto;image-rendering:pixelated}body.qr-full :is(.site-header,.site-footer),body.qr-full .send-shell>:not(#stage){display:none}body.qr-full .send-shell{max-width:none;padding:0;gap:0}body.qr-full #stage{width:100%;min-height:100dvh;align-items:center;margin:0;padding:0;border:0;border-radius:0;cursor:zoom-out}body.qr-full #stage[hidden]{display:none}details.settings{width:100%;font-size:14px}details.settings summary{color:var(--muted);cursor:pointer}details.settings .row{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}details.settings label{display:flex;flex-direction:column;gap:4px;color:var(--muted)}details.settings select,details.settings input[type=range]{font:inherit;font-size:16px;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:6px 8px;accent-color:var(--fg)}details.settings input[type=range]{padding:0;border:0}details.settings label.check{flex-direction:row;align-items:center;gap:8px;margin-top:12px}details.settings input[type=checkbox]{width:16px;height:16px;accent-color:var(--fg)}.settings-actual{margin-top:12px}.stream-specs,.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));gap:10px 16px;margin:14px 0 0;color:var(--muted)}.stream-specs dt,.metric .k{font-size:12px}.stream-specs dd,.metric 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12px;font-size:14px}#result{width:100%;display:flex;flex-direction:column;align-items:flex-start;gap:12px}#result:empty{display:none}.done,.failed{font-weight:600}.failed{color:var(--danger)}a.download{display:inline-block;color:var(--bg);background:var(--fg);border-radius:var(--radius);padding:10px 20px;font-weight:500;text-decoration:none}.received-note{width:100%;border:1px solid var(--line);border-radius:var(--radius);padding:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere}.received{max-width:100%;border-radius:var(--radius)}.note-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.help-dialog{color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:20px;max-width:min(30rem,90vw)}.help-dialog::backdrop{background:#0006}.help-dialog h2:focus{outline:none}.help-dialog ul{margin:12px 0 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