:root{--green:#153e34;--ink:#18332c;--gold:#a28d58;--line:#ccd9d1;--paper:#f5f7f3}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}header{max-width:1140px;margin:auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}a{color:var(--green);text-underline-offset:4px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:750}.brand img{width:54px;height:54px;object-fit:cover}.brand small{display:block;font-size:12px;font-weight:400;letter-spacing:1px}main{max-width:1140px;margin:auto;padding:0 24px}.hero{padding:65px 0 48px;max-width:850px}.eyebrow{font-size:12px;letter-spacing:1.6px;color:#5f705a;font-weight:750}h1{font-size:clamp(38px,6vw,68px);line-height:1.12;letter-spacing:-2px;margin:20px 0}h2{font-size:28px;line-height:1.25;margin:10px 0 22px}h3{font-size:21px;line-height:1.5}button,.button{font:inherit;font-weight:650;min-height:44px;padding:10px 20px;border:1px solid var(--green);border-radius:0;background:var(--green);color:white;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.button{margin:8px 8px 0 0}.secondary{background:transparent;color:var(--green)}button:disabled{opacity:.5;cursor:not-allowed}:focus-visible{outline:3px solid var(--gold);outline-offset:4px}.notice{border-left:4px solid var(--gold);background:#e8eee6;padding:20px 24px;font-size:14px}.notice strong{display:block;margin-bottom:5px}section:not(.hero){padding:42px 0;border-bottom:1px solid var(--line);scroll-margin-top:20px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:20px}.settings{display:flex;align-items:end;gap:16px;flex-wrap:wrap}.settings label{flex:1;min-width:220px;font-size:14px;font-weight:650}select{display:block;width:100%;font:inherit;padding:13px 10px;margin-top:6px;background:white;border:1px solid #8ba093;color:var(--ink);border-radius:0}.muted,#stats{color:#566c60;font-size:13px}#quiz{margin-top:25px;padding:28px;background:white;border:1px solid var(--line)}.quiz-meta{display:flex;justify-content:space-between;gap:12px;font-size:14px}progress{width:100%;height:6px;accent-color:var(--green)}fieldset{border:0;padding:0;margin:20px 0}legend{font-size:13px;color:#566c60;margin-bottom:10px}.answer{display:flex;align-items:start;gap:12px;padding:14px;border:1px solid var(--line);margin:8px 0;cursor:pointer}.answer:has(input:checked){background:#edf3ec;border-color:var(--green)}.answer input{margin-top:6px;accent-color:var(--green)}#feedback:not(:empty),#result:not(:empty){padding:18px;background:#e8eee6;margin:18px 0;border-left:3px solid var(--gold)}.actions{display:flex;gap:10px}.sources{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.sources article{background:white;padding:24px;border:1px solid var(--line)}.sources p{font-size:14px}.tag{font-size:10px;letter-spacing:1px;color:#637556}.text-button{color:var(--green);background:transparent;border:0;font-size:12px;padding-left:0;margin-top:12px}footer{max-width:1140px;margin:auto;padding:32px 24px;font-size:13px;color:#566c60}details{margin:12px 0}summary{cursor:pointer}#result li{margin:18px 0}[hidden]{display:none!important}@media(max-width:700px){header{padding:14px 16px}header>a:last-child{font-size:12px}.brand{font-size:12px;gap:8px}.brand img{width:42px;height:42px}.brand small{font-size:10px}main{padding:0 16px}.hero{padding:35px 0}.hero h1{letter-spacing:-1px}.sources{grid-template-columns:1fr}.section-title{display:block}.settings{gap:12px}.settings label{min-width:100%}.settings button{width:100%}#quiz{padding:18px}.notice{padding:16px}h3{font-size:18px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Reviewed study-bank extension */
.study-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0}.study-overview>div{border:1px solid var(--line);background:#fff;padding:20px}.study-overview strong{display:block;font-size:34px;line-height:1.2;color:var(--green)}.study-overview span{font-size:14px}.question-source{display:block;margin:12px 0;color:#52675c;font-size:13px}.actions{flex-wrap:wrap}#study-guide details{padding:16px 20px;border:1px solid var(--line);background:white}#study-guide summary{font-weight:650}#study-guide p,#study-guide li{font-size:14px}#study-guide li{margin:8px 0}@media(max-width:600px){.study-overview{gap:8px}.study-overview>div{padding:12px}.study-overview strong{font-size:28px}.study-overview span{font-size:12px}.actions button{flex:1;min-width:120px}}
/* Compact, high-contrast study countdown. No timing logic changes. */
.quiz-meta{align-items:center;flex-wrap:wrap}
#timer{display:inline-flex;align-items:center;gap:10px;min-height:42px;padding:8px 14px;background:#153e34;color:#fff;border:1px solid #153e34;font-size:16px;font-weight:650;line-height:1.4;font-variant-numeric:tabular-nums;white-space:nowrap}
#timer:empty{display:none}
#timer::before{content:"";display:block;flex:0 0 18px;width:18px;height:18px;border:1.5px solid #d6c389;border-radius:50%;background:linear-gradient(#d6c389,#d6c389) 50% 4px/1.5px 6px no-repeat,linear-gradient(#d6c389,#d6c389) 9px 9px/5px 1.5px no-repeat}
#quiz progress{display:block;margin-top:16px}
@media(max-width:480px){#timer{font-size:14px;min-height:38px;padding:7px 10px;gap:8px}.quiz-meta{font-size:13px}}