:root{--ink:#1d2520;--muted:#72796f;--paper:#f4f2ea;--card:#fffef9;--line:#dedfd4;--accent:#bb8650;--green:#3e614c;--dark:#171d19;--radius:18px;font-family:Inter,'Segoe UI',Arial,sans-serif;color:var(--ink);background:var(--paper);font-size:15px}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:inherit}button{border:0;border-radius:10px;padding:12px 18px;background:var(--green);color:white;font-weight:600}button:hover{filter:brightness(1.1)}button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}button.danger{background:#a04336}button.small{padding:8px 12px;font-size:13px}.shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}.sidebar{background:var(--dark);color:#f3f0e5;padding:32px 22px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{font-size:26px;font-weight:950;letter-spacing:-1.7px;line-height:1}.brand span{color:#d7ac77}.brand small{display:block;font-size:10px;letter-spacing:4px;font-weight:500;margin-top:12px;color:#abb7a9}.sidebar nav{display:grid;gap:8px;margin:48px 0 25px}.sidebar nav button{text-align:left;color:#b9c3b7;background:transparent;display:flex;gap:13px}.sidebar nav button.active{color:#fff8e5;background:#2f3b31}.navicon{width:22px;font-size:19px}.sidebar .bottom{margin-top:auto}.profile{border-top:1px solid #384137;padding-top:22px;font-size:13px;line-height:1.7}.avatar{width:38px;height:38px;background:#d7ac77;color:#222;border-radius:50%;display:grid;place-items:center;font-weight:800;float:left;margin-right:10px}.sidebar select{width:100%;margin-top:15px;color:#ddd;background:#29332c;border:1px solid #465143;padding:10px;border-radius:8px}.sidebar .ghost{color:#ccd3c9;border-color:#445040;width:100%;margin-top:14px}.main{padding:30px 4.5vw 60px;max-width:1660px;width:100%;margin:auto}.topline{display:flex;justify-content:space-between;gap:15px;align-items:center;color:var(--muted);font-size:12px;margin-bottom:32px}.pill{display:inline-flex;gap:6px;align-items:center;border:1px solid var(--line);padding:6px 10px;border-radius:30px;font-size:11px;font-weight:650;letter-spacing:.3px}.pill.green{color:var(--green);background:#e9eee6;border:0}.pill.gold{color:#e7c89e;border-color:#5a6147;background:#354234}.eyebrow{text-transform:uppercase;letter-spacing:2.5px;font-size:11px;font-weight:700;color:var(--muted);margin:0 0 12px}h1{font-size:clamp(29px,3vw,44px);letter-spacing:-1.3px;line-height:1.1;margin:0 0 14px}h2{font-size:23px;letter-spacing:-.5px;margin:0}h3{font-size:18px;line-height:1.35;margin:13px 0}p{line-height:1.6}p.muted,.muted{color:var(--muted)}.intro{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.intro p{margin-bottom:0}.stamp{width:86px;height:86px;border:1px solid #b3baa7;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font-size:29px;font-weight:900;transform:rotate(-10deg);color:#5e715d}.hero{background:var(--dark);color:#f5f2e9;padding:30px;border-radius:var(--radius);position:relative;overflow:hidden;margin-bottom:26px}.hero:after{content:'H';position:absolute;right:5%;top:-60px;color:#29372b;font-size:340px;font-weight:950;transform:rotate(12deg);pointer-events:none}.hero>*{position:relative;z-index:1}.hero h2{font-size:30px;max-width:660px;margin:18px 0;line-height:1.2}.hero p{color:#b4c2b0;max-width:630px}.hero button{background:#d7ac77;color:#1c231c;margin-right:12px}.hero .ghost{border-color:#596753;color:#e0e6d9;background:transparent}.hero .meta{color:#c8d2c2}.meta{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:16px 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:17px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;min-width:0}.card p{margin:0 0 18px;color:var(--muted);font-size:13px}.card .actions{margin-top:auto;display:flex;gap:8px;flex-wrap:wrap}.card .actions button{flex:1;white-space:nowrap}.number{font-size:12px;color:var(--accent);font-weight:800;letter-spacing:1px}.sectionhead{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:30px 0 18px}.sectionhead p{margin:0;font-size:12px;color:var(--muted)}.statrow{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:26px}.stat{border:1px solid var(--line);border-radius:14px;padding:17px 22px;background:var(--card)}.stat strong{font-size:27px;display:block;margin-bottom:4px}.stat span{font-size:12px;color:var(--muted)}.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}.filters input{flex:1;min-width:200px}input,select,textarea{background:#fffef9;color:var(--ink);border:1px solid #ced2c4;border-radius:9px;padding:12px;max-width:100%}textarea{width:100%;resize:vertical;min-height:100px}label.field{display:grid;gap:7px;font-size:13px;margin:14px 0}.login{min-height:100vh;display:grid;grid-template-columns:1.05fr 1fr}.loginart{background:var(--dark);color:var(--paper);padding:60px;display:flex;flex-direction:column;justify-content:space-between}.loginart h1{font-size:clamp(40px,5vw,70px);max-width:600px}.loginform{padding:45px;align-self:center;width:100%;max-width:560px;margin:auto}.loginform button{width:100%;margin:8px 0}.previewbox{padding:18px;border:1px dashed #b49a76;border-radius:12px;margin-top:25px;font-size:13px}.previewbox p{margin:0 0 10px}.quiz{max-width:880px;margin:auto}.quizhead{position:sticky;top:0;background:var(--paper);padding:12px 0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:15px}.progress{height:5px;background:#d9dfd2;border-radius:5px;margin:16px 0}.progress progress{width:100%;height:5px;display:block;accent-color:var(--green)}.question{padding:28px;margin:20px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}.question h3{font-size:20px;margin:14px 0 22px}.option{display:flex;align-items:start;gap:12px;padding:15px;margin:9px 0;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-size:14px;line-height:1.6}.option:has(input:checked){border-color:var(--green);background:#edf1e8}.option input{accent-color:var(--green);margin-top:5px;flex-shrink:0}.option.correct{background:#e7efdf;border-color:#8ea782}.option.wrong{background:#faeee9;border-color:#d7ada2}.quizfooter{display:flex;gap:12px;justify-content:space-between;margin-top:24px;align-items:center}.questionnav{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0}.questionnav button{padding:7px;min-width:32px;font-size:12px;background:transparent;border:1px solid var(--line);color:var(--ink)}.questionnav button.done{background:#dce7d6}.questionnav button.current{background:var(--green);color:white}.resultscore{font-size:80px;font-weight:850;letter-spacing:-5px;line-height:1.1;margin:20px 0}.resultscore small{font-size:28px;letter-spacing:0}details{border-top:1px solid var(--line);padding:15px 0}summary{cursor:pointer;font-weight:600;line-height:1.6}details p{font-size:14px}table{border-collapse:collapse;width:100%;font-size:13px}td,th{text-align:left;padding:13px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:500}.tablewrap{overflow:auto}.tabbar{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}.tabbar button{background:transparent;color:var(--ink);border:1px solid var(--line)}.tabbar button.active{background:var(--green);color:white}.notice{padding:14px 18px;background:#eee9dc;border-left:3px solid var(--accent);font-size:13px;line-height:1.6;margin:20px 0;border-radius:0 10px 10px 0}.empty{padding:45px;text-align:center;border:1px dashed var(--line);border-radius:16px;color:var(--muted)}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:20;background:#18231a;color:#fff;padding:14px 24px;border-radius:12px;display:none;max-width:90vw;box-shadow:0 5px 25px #0003}dialog{max-width:650px;width:calc(100% - 32px);max-height:85vh;border:0;border-radius:20px;padding:28px;background:var(--paper);color:var(--ink)}dialog::backdrop{background:#07120999;backdrop-filter:blur(4px)}dialog h2{margin-bottom:20px}.dialogactions{display:flex;justify-content:end;gap:10px;margin-top:22px}.source{font-size:11px;color:var(--muted);word-break:break-word}#celebration{position:fixed;inset:0;pointer-events:none;z-index:25;overflow:hidden}#celebration i{position:absolute;top:-30px;width:10px;height:18px;background:#d7ac77;animation:fall 2.8s ease-in forwards}#celebration i:nth-child(3n){background:#628365}#celebration i:nth-child(3n+1){background:#ece7d3}@keyframes fall{to{transform:translateY(110vh) rotate(680deg)}}.mobilebrand{display:none}.settingscols{display:grid;grid-template-columns:1fr 1fr;gap:24px}.full{width:100%}.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.spacer{flex:1}.quiet{font-size:12px;color:var(--muted)}.alert{color:#a04336}.material{max-width:950px}.material details{padding:20px 0}
@media(max-width:900px){.shell{grid-template-columns:180px 1fr}.sidebar{padding:25px 12px}.main{padding:25px}.brand{font-size:22px}.hero{padding:24px}.hero h2{font-size:25px}.settingscols{grid-template-columns:1fr}.loginart{padding:35px}}
@media(max-width:650px){.shell{display:block}.sidebar{height:auto;position:static;padding:18px 20px;display:block}.sidebar>.brand,.profile,.sidebar .bottom>.ghost{display:none}.mobilebrand{display:block}.sidebar nav{display:flex;margin:12px 0 0;overflow:auto;gap:4px}.sidebar nav button{padding:10px;font-size:12px;white-space:nowrap;gap:6px}.sidebar select{margin-top:8px;padding:6px;font-size:12px}.main{padding:22px 18px 40px}.topline{margin-bottom:23px}.intro{gap:10px}.stamp{width:55px;height:55px;font-size:21px}.hero h2{font-size:25px}.hero:after{font-size:270px;right:-40px;top:0}.hero button{margin-bottom:7px}.statrow{gap:8px}.stat{padding:13px 10px}.stat strong{font-size:23px}.stat span{font-size:10px}.sectionhead{align-items:start}.sectionhead h2{font-size:21px}.grid{grid-template-columns:1fr}.question{padding:20px}.question h3{font-size:18px}.quizhead{font-size:12px}.quizfooter{flex-wrap:wrap}.login{display:block}.loginart{padding:25px}.loginart h1{font-size:35px;margin:25px 0 0}.loginart p,.loginart .eyebrow{display:none}.loginform{padding:25px}.resultscore{font-size:66px}.option{padding:12px}.topline .quiet{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;scroll-behavior:auto!important}}
.logocrop{display:block;width:180px;height:96px;overflow:hidden}.logocrop img{display:block;margin-top:-36px;width:180px;height:180px}.brand small{letter-spacing:2.5px}.sidebar nav{margin-top:28px}.loginart{background:linear-gradient(180deg,#121b16dd,#121b1677 45%,#121b16dd),url('/assets/team.jpg') center 63%/cover}.loginart h1{text-shadow:0 2px 25px #0009}.loginart .brand{width:fit-content;padding:10px 15px 18px;background:#151e18d9;border-radius:12px}.hero{background:linear-gradient(90deg,#172019 30%,#172019eb 62%,#17201955),url('/assets/practice.jpg') right 42%/auto 150% no-repeat,#172019}.hero:after{display:none}.card{transition:transform .16s,box-shadow .16s}.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px #2435230a}.question{animation:questionIn .18s ease-out}@keyframes questionIn{from{opacity:.65;transform:translateX(8px)}to{opacity:1;transform:translateX(0)}}
@media(max-width:650px){.mobilebrand .brand{display:flex;align-items:center;gap:15px}.mobilebrand .logocrop{width:100px;height:46px}.mobilebrand .logocrop img{width:100px;height:100px;margin-top:-24px}.mobilebrand .brand small{font-size:10px;letter-spacing:1.3px;margin:0}.hero{background:linear-gradient(90deg,#172019f5,#172019d9),url('/assets/practice.jpg') center/cover}.loginart .brand{padding:0;background:transparent}.loginart .brand .logocrop{height:75px}.loginart .brand small{font-size:10px}.loginart{background-position:center 65%}}
.logocrop{position:relative;height:108px}.logocrop img{position:absolute;top:-32px;left:0;margin:0}.brand small{line-height:1.5;margin-top:12px}.loginart .eyebrow{color:#f0d7ac;text-shadow:0 2px 5px #000;background:#111b15cf;border:1px solid #dfc59666;border-radius:7px;padding:10px 13px;width:fit-content;line-height:1.6}.loginart>div>p:not(.eyebrow){color:#f4f3ec;text-shadow:0 2px 6px #000;max-width:540px}.loginart>.quiet{color:#e2e7dc}
@media(max-width:650px){.mobilebrand .logocrop{height:56px}.mobilebrand .logocrop img{top:-23px;margin:0}.loginart .brand .logocrop{height:108px}.loginart .eyebrow{display:block;font-size:9px;letter-spacing:1.5px}.loginart>div>p:not(.eyebrow){display:block;font-size:13px}.loginart h1{margin-top:12px}}
.folderlink{display:inline-block;padding:12px 17px;background:var(--green);color:white;text-decoration:none;border-radius:10px;margin-top:auto;width:fit-content;font-weight:600}.sidebar nav button{line-height:1.45}
.libraryrole{margin:18px 0}.folderrow{padding:0 0 18px;margin-bottom:18px;border-bottom:1px solid var(--line)}
/* Owner-only, read-only role demonstration. No alternate login is created. */
.role-preview-banner{display:flex;gap:20px;align-items:center;justify-content:space-between;padding:18px 22px;margin:16px 0 26px;border:1px solid #a98c53;border-radius:14px;background:#28291f;color:#fff}
.role-preview-banner p{margin:6px 0 0;color:#e4decf;font-size:14px;max-width:640px}
.role-preview-banner button.ghost{color:#fff9e9;border-color:#c8ba96;background:#363a2e}.role-preview-banner button.ghost:hover{background:#45523f}
@media(max-width:700px){.role-preview-banner{align-items:flex-start;flex-direction:column}.role-preview-banner button{width:100%}}
/* Navigation remains reachable on short screens; phones use a wrapping menu. */
.shell,.main{min-width:0}
.mobilebar{display:none}
.sidebar{height:100vh;height:100dvh;overflow-y:auto;overscroll-behavior-y:contain}
.sidebar>*,.sidebar nav button{flex-shrink:0}
.sidebar .logocrop{max-width:100%}
@media(max-width:900px),(max-width:1100px) and (max-height:560px){
  .shell{display:block}
  .sidebar{position:static;height:auto;overflow:visible;display:block;padding:14px 18px}
  .sidebar>.brand{display:none}
  .mobilebar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
  .mobilebrand{display:block}
  .mobilebrand .brand{display:flex;align-items:center;gap:12px}
  .mobilebrand .logocrop{width:100px;height:56px}
  .mobilebrand .logocrop img{width:100px;height:100px;top:-23px;margin:0}
  .mobilebrand .brand small{font-size:9px;letter-spacing:1px;margin:0;max-width:85px;line-height:1.5}
  .mobileactions{display:flex;gap:8px;align-items:center}
  .sidebar .mobileactions button{display:block;width:auto;min-height:44px;padding:10px 12px;margin:0;color:#fff9e9;border-color:#69745f;white-space:nowrap}
  .sidebar .mobileactions [data-logout]{background:#344838}
  .sidebar nav{display:none;margin:16px 0 0;overflow:visible;gap:8px}
  .sidebar.menu-open nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .sidebar nav button{min-width:0;min-height:48px;white-space:normal;overflow-wrap:anywhere;align-items:center;padding:12px;font-size:13px;gap:8px;line-height:1.4;border:1px solid #394639}
  .navicon{flex:0 0 20px}
  .sidebar .bottom{display:none;margin:14px 0 0}
  .sidebar.menu-open .bottom{display:block}
  .sidebar .profile{display:block;min-height:48px;padding-top:12px}
  .sidebar .bottom>#account{display:block;min-height:44px}
  .sidebar .bottom>.desktop-logout{display:none}
  .main{padding:24px 18px 40px}
  .grid{grid-template-columns:repeat(auto-fit,minmax(min(270px,100%),1fr))}
  .settingscols{grid-template-columns:1fr}
  .role-preview-banner{align-items:flex-start;flex-direction:column}
  .role-preview-banner button{width:100%;min-height:44px}
}
@media(max-width:480px){
  .mobilebar{gap:8px}
  .mobilebrand .brand small{display:none}
  .mobileactions{margin-left:auto}
  .sectionhead{flex-wrap:wrap}
  .intro>div:first-child{min-width:0}
  .intro .stamp{display:none}
  .hero>button{width:100%;margin-right:0;min-height:44px}
  .card .actions button{white-space:normal;min-height:44px}
  input,select,textarea{font-size:16px}
}

/* Review 20261014 */
.answer-explanation{margin:1rem 0;padding:0 0 0 1rem;border-left:3px solid #b49557}.answer-explanation h4,.open-study h4,.open-result h4{margin:.8rem 0 .35rem}.answer-explanation p,.free-answer{white-space:pre-line;overflow-wrap:anywhere}.source{overflow-wrap:anywhere}.source a{display:inline-block;margin-top:.4rem}.open-study{margin-top:2rem}.open-study details,.open-result{margin:.7rem 0}.open-result textarea{min-height:90px}.firework{position:absolute;width:1px;height:1px}.firework b{position:absolute;display:block;width:5px;height:5px;background:var(--spark-color);border-radius:50%;box-shadow:0 0 8px var(--spark-color);opacity:0;animation:hs-firework 1.4s ease-out var(--delay) both;transform:rotate(var(--angle)) translateX(0)}@keyframes hs-firework{5%{opacity:1}65%{opacity:1}100%{opacity:0;transform:rotate(var(--angle)) translateX(var(--distance)) scale(.2)}}@media(prefers-reduced-motion:reduce){.firework{display:none}}