:root{font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;color:#172338;background:#f5f8fd;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input,textarea{font:inherit}a{color:#265fd3;text-decoration:none}a:hover{text-decoration:underline}.shell{max-width:870px;margin:0 auto;padding:24px 18px 64px}.top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:12px 0 28px}.brand{font-size:16px;font-weight:750;color:#273b65}.chip{background:#e6efff;color:#2457bc;padding:6px 11px;border-radius:999px;font-size:12px}.hero{padding:32px 30px;background:linear-gradient(125deg,#1b4aa3,#4388e6);color:white;border-radius:22px;box-shadow:0 8px 30px #23468a25}.hero h1{font-size:27px;line-height:1.35;margin:0 0 10px}.hero p{color:#e8f1ff;line-height:1.8;margin:0}.card{padding:22px 25px;background:white;border-radius:18px;border:1px solid #e1e7f0;box-shadow:0 3px 12px #1d36620c;margin-top:16px}.card h2{font-size:19px;margin:0 0 15px}.card h3{font-size:16px;margin:0 0 10px}.muted{color:#697991;font-size:14px;line-height:1.8}.small{font-size:12px}.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:11px;padding:12px 19px;background:#2867db;color:white;font-weight:650;cursor:pointer;min-height:44px;text-decoration:none!important}.button:hover{background:#2057bd}.button:disabled{opacity:.5;cursor:wait}.button.secondary{background:#eaf0fa;color:#2b4f95}.button.danger{background:#fff2f2;color:#b93434}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:19px}.field{margin:13px 0}.field>label{display:block;font-weight:600;margin-bottom:8px;font-size:14px}.input,textarea{width:100%;border:1px solid #cad5e7;background:white;border-radius:10px;padding:11px 12px;color:#172338;outline:none}.input:focus,textarea:focus{border-color:#3277e0;box-shadow:0 0 0 3px #bcd7ff77}textarea{min-height:280px;font-family:ui-monospace,Consolas,monospace;font-size:13px}.question{margin:20px 0;padding-bottom:20px;border-bottom:1px solid #edf0f5}.question:last-child{border-bottom:0;padding-bottom:0}.qtext{font-weight:650;line-height:1.75}.required{color:#d5394f;margin-left:5px}.options{display:grid;gap:8px;margin-top:13px}.choice{display:flex;align-items:center;gap:9px;cursor:pointer;background:#f8faff;border:1px solid #e8ecf4;border-radius:9px;padding:11px}.choice:has(input:checked){border-color:#477ee2;background:#eff5ff}.choice input{accent-color:#2967dc}.meta{display:grid;grid-template-columns:1fr 1fr;gap:14px}.error{color:#b3263d;background:#fff0f2;border:1px solid #f2c9d2;padding:12px;border-radius:10px;white-space:pre-wrap;margin-top:14px}.success{color:#145a3d;background:#effdf6;border:1px solid #bef1d2;padding:12px;border-radius:10px;margin-top:14px}.hidden{display:none!important}.score{padding:16px;background:#f5f8ff;border-radius:11px;margin:14px 0}.scoreline{display:flex;justify-content:space-between;align-items:center;gap:12px}.big{font-size:27px;font-weight:800;color:#255bbd}.bar{height:9px;background:#dce7fb;overflow:hidden;border-radius:99px;margin-top:11px}.bar>div{height:100%;background:#4483e7;border-radius:99px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:#f2f6fd;border-radius:12px;padding:14px}.stat strong{font-size:22px;color:#215ec5;display:block;margin-top:5px}.tableWrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:13px}td,th{text-align:left;padding:10px;border-bottom:1px solid #e9edf5;white-space:nowrap}th{background:#f6f9ff}.info{background:#f7f9fd;border-left:3px solid #5a8fe2;padding:12px 14px;white-space:pre-wrap;line-height:1.8;font-size:14px}.footer{text-align:center;color:#98a4b7;margin:28px 0;font-size:12px}@media(max-width:590px){.shell{padding:16px 12px 45px}.card{padding:18px}.hero{padding:26px 20px}.hero h1{font-size:23px}.meta,.stats{grid-template-columns:1fr}.top{margin:6px 0 17px}}
/* Research scale matrix: aligned radio columns on wide screens, tap-friendly on mobile. */
.matrix{margin-top:18px;border:1px solid var(--border,#dce5f0);border-radius:12px;overflow:hidden}
.matrix-head,.matrix-row{display:grid;grid-template-columns:minmax(220px,2.7fr) repeat(var(--choice-count),minmax(66px,1fr));align-items:stretch}
.matrix-head{background:#ecf4ff;font-size:13px;color:#485f7d;font-weight:700}
.matrix-head > div{padding:13px 5px;text-align:center}
.matrix-head > div:first-child{text-align:left;padding-left:18px}
.matrix-row{border-top:1px solid #e9eef4}
.matrix-row:nth-child(odd){background:#f8fbfe}
.matrix-question{padding:14px 16px;line-height:1.55;font-size:14px}
.matrix-option{display:flex;justify-content:center;align-items:center;min-height:54px;cursor:pointer}
.matrix-option input{width:17px;height:17px;cursor:pointer;accent-color:#2563eb}
.matrix-option:has(input:checked){background:#deebff}
.matrix-option .choice-label{display:none}
.copyright-notice{padding:12px 14px;background:#fffbeb;color:#805c10;border-radius:8px;font-size:12px;line-height:1.7;margin-top:16px}
@media(max-width:680px){
 .matrix{border:0;overflow:visible}
 .matrix-head{display:none}
 .matrix-row{grid-template-columns:repeat(var(--choice-count),minmax(0,1fr));border:1px solid #e3e9f3;border-radius:11px;margin-bottom:13px;overflow:hidden}
 .matrix-question{grid-column:1/-1;padding:14px 12px;background:#f2f7fc;font-size:14px}
 .matrix-option{display:flex;flex-direction:column;gap:5px;padding:8px 1px;min-height:63px;border-right:1px solid #eef1f5}
 .matrix-option .choice-label{display:block;font-size:11px;color:#526078;text-align:center;line-height:1.3}
}

/* V3.3: compact survey-management controls, mobile wrapping. */
.archive-toggle{display:inline-flex;align-items:center;gap:7px;color:#41536f;font-size:13px;cursor:pointer;min-height:44px}
.archive-toggle input{width:17px;height:17px;accent-color:#2867db}
.row-actions{display:flex;align-items:center;gap:6px;flex-wrap:wrap;min-width:320px}
.row-actions .button{min-height:36px;padding:7px 10px;font-size:12px}
select.input{cursor:pointer}
select.input:disabled{background:#f5f6f8;color:#6b7280}