:root{color-scheme:light;--ink:#183a35;--muted:#6b7e77;--green:#08745d;--line:#dce5dc}*{box-sizing:border-box}body{margin:0;background:#f5f7f1;color:var(--ink);font:15px/1.65 -apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",sans-serif}header,main,footer{max-width:1120px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:24px 28px;border-bottom:1px solid var(--line)}a{color:var(--green)}.brand{display:flex;align-items:center;gap:16px;color:var(--ink);text-decoration:none;min-width:0}.brand-logo{display:block;flex:none;width:160px;aspect-ratio:259.5/53.75;background:currentColor;-webkit-mask:url("/static/ibuki-logo.svg") center/contain no-repeat;mask:url("/static/ibuki-logo.svg") center/contain no-repeat}.brand-name{font-size:14px;font-weight:500;white-space:nowrap}.eyebrow{font-size:10px;letter-spacing:.15em;color:var(--green)}main{padding:32px 28px}.heading{display:flex;justify-content:space-between;align-items:end;gap:15px;margin-bottom:24px}h1{font-size:clamp(25px,4vw,34px);margin:0 0 7px;line-height:1.4}.heading p{color:var(--muted);margin:0;font-size:14px}#summary{font-size:12px;color:var(--muted);white-space:nowrap}nav{display:grid;grid-template-columns:repeat(8,1fr);gap:8px;margin-bottom:22px}button,.button{font:inherit;font-size:13px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);padding:10px 14px;cursor:pointer;text-decoration:none;min-height:44px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #d3a64e;outline-offset:3px}nav button{display:flex;align-items:center;justify-content:center;gap:8px;font-weight:650;padding:12px 8px}nav button:before{content:'';width:7px;height:7px;border-radius:50%;background:#b6c2ba}nav button[data-state=receiving]:before{background:#20ba7d}nav button[data-state=unknown]:before{background:#d6a754}nav button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white;box-shadow:0 2px 7px #103e2b18}.viewer{background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden}.viewer-top,.viewer-bottom{display:flex;align-items:center;justify-content:space-between;padding:15px 20px;gap:15px}.viewer-top strong{font-size:20px}#status{font-size:13px;color:var(--muted)}#status[data-state=receiving]{color:var(--green)}.picture{position:relative;background:#17352f;aspect-ratio:16/9}video{display:block;width:100%;height:100%;object-fit:contain}#empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#e0ebe3;text-align:center;padding:20px}#empty .symbol{font-size:50px;color:#9dbaa7;font-weight:200}#empty strong{font-size:19px;font-weight:600}#empty p{font-size:13px;color:#a9bfb0;max-width:420px}#play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}#playback-note{font-size:12px;color:var(--muted)}#sound{white-space:nowrap}#sound[aria-pressed=true]{color:var(--green);background:#eaf4e9;border-color:#b9d9c1}.hint,.footnote{font-size:12px;color:var(--muted);margin:16px 0 24px}.setup{padding:18px 20px;border:1px solid var(--line);border-radius:12px;background:#eef2e9;margin-top:26px}.setup summary{cursor:pointer;font-size:14px;font-weight:600}.setup p{font-size:13px;max-width:800px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.setup label{font-size:12px;display:block}input{display:block;width:100%;padding:12px;margin:7px 0;font:12px monospace;border:1px solid var(--line);border-radius:8px;background:#fafcf8;color:var(--ink)}footer{border-top:1px solid var(--line);padding:20px 28px;font-size:11px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:650px){header{padding:18px}.brand{gap:12px}.brand-logo{width:132px}.brand-name{font-size:13px}.eyebrow{display:none}main{padding:24px 16px}.heading{display:block}.heading p{font-size:12px}#summary{display:block;margin-top:12px}nav{grid-template-columns:repeat(4,1fr);gap:7px}nav button{font-size:12px;padding:10px 7px}.viewer-top,.viewer-bottom{padding:12px}.viewer-top strong{font-size:17px}#empty strong{font-size:16px}#empty p{font-size:11px;margin:5px 0}#empty .symbol{font-size:32px}.viewer-bottom{align-items:center}#playback-note{font-size:10px}#sound{font-size:12px;padding:8px 12px}.setup{padding:15px}.hint{font-size:11px}}