:root{
 --navy:#0a2d49;--blue:#1768d2;--teal:#08a58e;--green:#16845f;--gold:#f4c34b;
 --orange:#ef8c3c;--red:#ce4f4a;--pink:#d95a95;--ink:#17324d;--muted:#60768b;
 --line:#cbdbe6;--bg:#f2f8fb;--soft:#e9f5f9;--mint:#e8f8f3;--cream:#fff7df;--white:#fff;
}
*{box-sizing:border-box}html,body{margin:0;font-family:Inter,Arial,"Noto Sans Thai",sans-serif;background:var(--bg);color:var(--ink)}
button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit}.hidden{display:none!important}
.top{position:sticky;top:0;z-index:50;background:linear-gradient(90deg,#071f33,#0d4267);color:#fff;padding:11px 14px;box-shadow:0 3px 16px rgba(5,26,45,.16)}
.topin{max-width:1180px;margin:auto;display:flex;gap:12px;align-items:center;justify-content:space-between}
.brand{font-weight:950;font-size:18px}.meta{font-size:12px;color:#d4e7f2;margin-top:2px}.wrap{max-width:1180px;margin:14px auto;padding:0 12px 60px}
.panel,.card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 7px 24px rgba(16,56,83,.06)}
.panel{padding:18px;margin-bottom:13px}.card{padding:14px}.h1{font-size:clamp(28px,4vw,42px);line-height:1.08;color:var(--navy);font-weight:950;margin:0 0 8px}.h2{font-size:clamp(22px,3vw,30px);line-height:1.15;color:var(--navy);font-weight:950;margin:0 0 8px}.h3{font-size:18px;font-weight:900;color:var(--navy);margin:0 0 5px}
.lead{font-size:18px;line-height:1.55;color:var(--muted)}.eyebrow{font-size:12px;font-weight:950;text-transform:uppercase;letter-spacing:.08em;color:var(--blue)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
label{font-weight:850;font-size:13px}input,select,textarea{width:100%;margin-top:5px;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fff;color:var(--ink)}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.btn{border:0;border-radius:11px;padding:10px 14px;font-weight:900}.btn.big{font-size:17px;padding:12px 17px}.btn:disabled{opacity:.42;cursor:not-allowed}.teal{background:var(--teal);color:#fff}.blue{background:var(--blue);color:#fff}.navy{background:var(--navy);color:#fff}.gold{background:var(--gold);color:#31290d}.orange{background:var(--orange);color:#fff}.red{background:var(--red);color:#fff}.light{background:#eef5f8;color:var(--navy);border:1px solid var(--line)}
.status{margin-top:9px;padding:10px 12px;border-radius:10px;background:#eef5f8;font-weight:750;line-height:1.45}.status.ok{background:#e3f6ed;color:#086247}.status.err{background:#fdeaea;color:#89312d}.status.warn{background:#fff4d8;color:#765713}
.classnotes{background:var(--cream);border:1px solid #ead171;border-left:5px solid var(--gold);border-radius:13px;padding:12px 14px;line-height:1.55}.classnotes b{color:#7d5d00}
.th{background:var(--mint);border-left:4px solid var(--teal);padding:8px 10px;border-radius:9px;line-height:1.5;margin-top:6px}.en{font-size:18px;line-height:1.55}.small{font-size:12px;color:var(--muted)}
.progress{height:10px;background:#d9e7ed;border-radius:99px;overflow:hidden}.bar{height:100%;background:linear-gradient(90deg,var(--teal),var(--blue));width:0}
.pill{display:inline-block;padding:6px 10px;border-radius:999px;background:#eaf3f7;font-weight:900;color:var(--navy);font-size:12px}.pill.active{background:var(--teal);color:#fff}
.metric{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.metric .v{font-size:23px;font-weight:950;color:var(--teal)}
.notice{background:#fff7de;border:1px solid #ebd179;border-radius:12px;padding:11px 13px;line-height:1.5}
footer.dev{text-align:center;color:var(--muted);font-size:12px;margin-top:18px}
.aocrwrap{position:relative;isolation:isolate;overflow:hidden}.aocr{position:absolute;inset:0;z-index:0;pointer-events:none;background-image:repeating-linear-gradient(28deg,transparent 0 43px,rgba(12,44,71,.026) 43px 45px),radial-gradient(circle at 2px 2px,rgba(8,165,142,.045) 1px,transparent 1.2px);background-size:auto,18px 18px}.wm{position:absolute;inset:-80px;z-index:0;pointer-events:none;display:grid;grid-template-columns:repeat(3,1fr);gap:52px;transform:rotate(-24deg);opacity:.052;font-size:10px;font-weight:950;color:#17324d}.trace{position:absolute;right:7px;bottom:5px;z-index:3;color:#668098;font-size:9px}.inner{position:relative;z-index:2}.aocr.reduced{opacity:.35}.wm.reduced{opacity:.018}
@media(max-width:800px){.grid2,.grid3,.grid4,.metric{grid-template-columns:1fr}.topin{align-items:flex-start}.wrap{padding-bottom:80px}}
@media(prefers-contrast:more){.aocr{opacity:.25}.wm{opacity:.016}}
@media print{body{display:none!important}}

.bigN{font-size:38px;font-weight:950;color:var(--teal);margin:4px 0}.ack{display:flex;gap:8px;align-items:flex-start;margin:13px 0;font-size:15px}.ack input{width:auto;margin-top:2px}
.work{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);gap:12px}.passagePane,.qPane{min-height:520px}.passage{font-size:17px;line-height:1.78}.passage p{margin:0 0 15px}.passage .ptitle{font-size:24px;font-weight:950;color:var(--navy);margin-bottom:14px}.passage .pnum{font-weight:950;color:var(--blue);margin-right:5px}
.qPrompt{font-size:20px;font-weight:900;line-height:1.45;margin:8px 0 12px}.opts{display:grid;gap:8px}.opt{border:1px solid var(--line);background:#fbfdfe;border-radius:11px;padding:11px 12px;text-align:left;font-weight:800;line-height:1.4}.opt.selected{border-color:var(--blue);background:#eaf3ff;outline:3px solid rgba(23,104,210,.12)}
.techTip{border-left:5px solid var(--gold);background:#fff8df;border-radius:12px;padding:10px 12px;line-height:1.45}.qtime{font-size:13px;color:var(--muted)}
.drawer{position:fixed;z-index:80;inset:4vh 4vw;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 50px rgba(6,28,47,.3);overflow:auto;padding:18px}.drawerHead{position:sticky;top:-18px;background:#fff;padding:10px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.score{font-size:72px;font-weight:950;text-align:center;color:var(--teal);margin:10px}.evidence{margin-top:12px;border:2px solid #e6ba3f;background:#fff8dc;border-radius:15px;padding:14px}
@media(max-width:900px){.work{grid-template-columns:1fr}.passagePane{display:none}.qPane{min-height:0}}