*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;background:#f4f7f0;color:#222}
header{background:#2e6b30;color:#fff;padding:8px 12px;position:sticky;top:0;z-index:5}h1{margin:0 0 6px;font-size:1.3em}
nav{display:flex;gap:4px}nav button{flex:1;padding:10px 4px;border:0;border-radius:6px;background:#ffffff22;color:#fff;font-size:1em}nav button.on{background:#fff;color:#2e6b30;font-weight:bold}
main{padding:12px;max-width:760px;margin:auto}section{display:none}section.on{display:block}
label{display:block;margin:8px 0}input,select{font-size:1em;padding:8px;border:1px solid #bbb;border-radius:6px;width:100%;max-width:340px}
button,.btn{font-size:1em;padding:10px 14px;border:1px solid #2e6b30;border-radius:8px;background:#fff;color:#2e6b30;cursor:pointer;display:inline-block;margin:4px 4px 4px 0}
.primary{background:#2e6b30;color:#fff}.row{display:flex;flex-wrap:wrap;gap:4px}
.preview svg{width:100%;height:auto;border:1px solid #ccc;background:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:4px;margin:8px 0}
.q{display:flex;align-items:center;gap:2px;background:#fff;padding:3px;border-radius:6px;font-size:.9em}.q b{width:24px;text-align:right;margin-right:3px}
.q span{width:22px;height:22px;border:1px solid #999;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:.75em;cursor:pointer}
.q span.sel{background:#222;color:#fff}.q.wrong{background:#fdd}.q.blank{background:#ffe9b0}.q.key span.k{outline:2px solid #2a2}
.score{font-size:2em;font-weight:bold;color:#2e6b30}canvas.res{width:100%;border:1px solid #ccc}
ul{padding:0;list-style:none}li{background:#fff;padding:8px;margin:4px 0;border-radius:6px;display:flex;justify-content:space-between;align-items:center}
table{width:100%;border-collapse:collapse;background:#fff}td,th{border:1px solid #ddd;padding:6px;text-align:left}
#camWrap{position:fixed;inset:0;background:#000;z-index:10}#camWrap video,#camWrap canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.camBar{position:absolute;bottom:0;left:0;right:0;padding:10px;display:flex;gap:6px;align-items:center;background:#000a;color:#fff}.camBar span{flex:1}
.err{color:#b00;font-weight:bold}#printArea{display:none}
@media print{body>*:not(#printArea){display:none!important}#printArea{display:block}#printArea svg{width:100%;height:auto;page-break-after:always}@page{size:letter;margin:0.3in}}
fieldset{border:1px solid #ccc;border-radius:8px;margin:10px 0;background:#fff}.row label{flex:1;min-width:110px}
.note{background:#fff8e1;border-left:4px solid #e0a800;padding:8px;font-size:.9em}