:root{color-scheme:dark;font-family:system-ui,-apple-system,sans-serif;background:#0c1322;color:#e7edf7}*{box-sizing:border-box}body{margin:0}header{padding:24px max(6vw,20px);display:flex;justify-content:space-between;border-bottom:1px solid #28344b}a{color:#81dfcf;text-decoration:none}header a{font-size:22px;font-weight:750}header span{color:#a5b2c9}main{max-width:1150px;margin:45px auto;padding:0 22px;min-height:65vh}h1{font-size:clamp(28px,4vw,45px);letter-spacing:-1px}h2{font-size:22px}p{line-height:1.7;color:#b3c1d6}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr));gap:24px}section,.row{background:#151f32;border:1px solid #2b3952;border-radius:18px;padding:26px;margin:20px 0}label{display:block;margin:15px 0;color:#cbd6e6}input:not([type=checkbox]){display:block;width:100%;padding:13px;background:#0b1424;border:1px solid #42516b;border-radius:8px;color:white;margin-top:7px}input[type=checkbox]{accent-color:#71d6c5}button,.button{background:#80e2cd;color:#07251e;border:0;border-radius:9px;padding:12px 18px;font-size:14px;font-weight:700;cursor:pointer;display:inline-block}button:hover,.button:hover{background:#b5f9eb}form{margin:18px 0}nav{display:flex;gap:22px;flex-wrap:wrap}.error{color:#ffcf92}small{color:#82decd;letter-spacing:2px}.muted,footer{font-size:13px;color:#9aabc4}footer{text-align:center;padding:35px}#stage{position:relative;background:black;width:100%;aspect-ratio:16/9;overflow:hidden}#stage video{width:100%;height:100%;object-fit:contain}#watermark{position:absolute;z-index:3;pointer-events:none;background:#0009;color:#fff;padding:8px 12px;font-size:clamp(11px,1.5vw,16px);text-shadow:0 1px 3px black;border-radius:5px;max-width:85%;overflow-wrap:anywhere}#stage:fullscreen{width:100vw;height:100vh;aspect-ratio:auto}#fullscreen{margin-top:15px}@media(max-width:600px){header span{display:none}main{margin:28px auto}section{padding:20px}}