:root{font-family:system-ui,sans-serif;color:#172033;background:#f4f6fb}
*{box-sizing:border-box}
body{margin:0}
.sticky{position:sticky;top:0;z-index:10;background:#172033;color:white;display:flex;justify-content:space-between;align-items:center;padding:12px max(16px,calc((100% - 900px)/2));box-shadow:0 3px 14px #0004}
.sticky h1{margin:0;font-size:1.4rem}
#timer{font-size:2rem;font-weight:800;color:#62e6a7}
.overtime{color:#ff6262!important}
#qrcode{background:white;padding:5px}
#qrcode img{display:block}
main{max-width:1200px;margin:26px auto;padding:0 16px}
.card,.puzzle{background:white;border-radius:14px;padding:20px;margin-bottom:16px;box-shadow:0 4px 16px #17203316}
.puzzle{border-left:6px solid #6c7a96}
.puzzle.ok{border-color:#13a86b}
.locked{opacity:.45;pointer-events:none}
.hidden{display:none!important}
label{display:grid;gap:7px;font-weight:700;margin:12px 0}
input,select,textarea{font:inherit;padding:12px;border:1px solid #bbc3d0;border-radius:8px}
textarea{min-height:90px}
button{font:inherit;font-weight:800;border:0;border-radius:9px;padding:12px 18px;background:#5b45d6;color:white;cursor:pointer}
button:disabled{background:#9aa3b3}
.message{font-weight:700}
.bravo{padding:30px;text-align:center;border-radius:14px;background:#13a86b;color:white;font-size:2rem;font-weight:900}@media(max-width:600px){#qrcode{transform:scale(.75);transform-origin:right center}.sticky{height:120px}#timer{font-size:1.6rem}}