:root{--brand:#1c7a4d;--brand2:#14613c;--ink:#1f2937;--muted:#6b7280;--bg:#f4f7f5;--card:#fff;--line:#e3e9e5;--danger:#c0392b;--ok:#1c7a4d}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:760px;margin:0 auto;padding:18px}
.wide{max-width:1100px}
.brandbar{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;padding:16px 0}
.brandbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:10px}
.brandbar h1{font-size:18px;margin:0}
.brandbar .logo{height:32px;width:auto;display:block;background:#fff;padding:5px 11px;border-radius:8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:0 1px 3px rgba(0,0,0,.04);margin-bottom:18px}
h2{margin:0 0 6px;font-size:22px}
.sub{color:var(--muted);margin:0 0 16px}
label{display:block;font-size:13px;font-weight:600;margin:12px 0 5px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #cdd6d0;border-radius:8px;font-size:15px;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(28,122,77,.12)}
.btn{display:inline-block;background:var(--brand);color:#fff;border:none;border-radius:8px;padding:12px 22px;font-size:15px;font-weight:600;cursor:pointer}
.btn:hover{background:var(--brand2)}
.btn.sec{background:#eef2ef;color:var(--ink)}
.btn.gray{background:#6b7280}.btn.red{background:var(--danger)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:12px;flex-wrap:wrap}.row>*{flex:1;min-width:160px}
.err{background:#fdecea;border:1px solid #f5c6cb;color:#a32a23;padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px}
.ok{background:#e8f5ee;border:1px solid #bfe6cf;color:#1c7a4d;padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px}
.muted{color:var(--muted)}.center{text-align:center}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left}
th{background:#f0f4f1;font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:#4b5563}
.pill{display:inline-block;padding:2px 9px;border-radius:11px;font-size:11px;font-weight:600}
.pill.easy{background:#e8f5ee;color:#1c7a4d}.pill.medium{background:#fff4e0;color:#b06a00}.pill.hard{background:#fdecea;color:#c0392b}
/* quiz */
.qtimer{position:sticky;top:0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;z-index:5}
.qtimer .t{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}
.qtimer .t.warn{color:var(--danger)}
.prog{height:7px;background:#e7ede9;border-radius:6px;overflow:hidden;margin-top:8px}
.prog>i{display:block;height:100%;background:var(--brand);transition:width .3s}
.opt{display:block;border:1px solid #cdd6d0;border-radius:9px;padding:13px 15px;margin:9px 0;cursor:pointer;font-size:15px}
.opt:hover{border-color:var(--brand)}
.opt.sel{border-color:var(--brand);background:#eaf6ef;box-shadow:0 0 0 2px rgba(28,122,77,.18)}
.opt input{display:none}
.navbtns{display:flex;justify-content:space-between;gap:10px;margin-top:18px}
.dots{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.dots b{width:30px;height:30px;border-radius:6px;display:grid;place-items:center;background:#eef2ef;font-size:12px;font-weight:600;cursor:pointer;border:1px solid var(--line)}
.dots b.done{background:var(--brand);color:#fff}.dots b.cur{outline:2px solid var(--brand2)}
.scorebig{font-size:54px;font-weight:800;color:var(--brand)}
/* admin */
.adminnav{background:#13302a;color:#cfe3d8}
.adminnav .wrap{display:flex;gap:6px;flex-wrap:wrap;align-items:center;padding:10px 18px}
.adminnav a{color:#cfe3d8;padding:7px 12px;border-radius:7px;font-size:14px}
.adminnav a:hover,.adminnav a.on{background:#1c7a4d;color:#fff}
.adminnav .sp{flex:1}
.cards{display:flex;flex-wrap:wrap;gap:14px}
.stat{flex:1;min-width:160px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.stat .n{font-size:30px;font-weight:800;color:var(--brand)}
.stat .l{font-size:13px;color:var(--muted)}
@media(max-width:600px){.wrap{padding:12px}.card{padding:16px}}