@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--navy:#142f44;--navy2:#1c3d55;--blue:#2259de;--bg:#f5f5f0;--ink:#142f44;--muted:#61717b;--line:#dfe4e4;--green:#21704c;--red:#ae3e3e;--soft:#eaf0ff;font-family:'DM Sans',Arial,sans-serif;color:var(--ink);font-size:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button,a,input,select,textarea{outline-offset:4px}button:focus-visible,a:focus-visible{outline:3px solid #6894f5}button{transition:background .15s,transform .15s}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button:hover:not(:disabled){filter:brightness(.96)}.skip-link{position:fixed;top:-80px;left:20px;z-index:30;background:#fff;padding:15px}.skip-link:focus{top:10px}.sidebar{width:250px;position:fixed;inset:0 auto 0 0;background:var(--navy);color:white;padding:32px 24px;display:flex;flex-direction:column}.brand{color:#fff;display:flex;align-items:center;gap:12px;text-decoration:none}.brand:hover{text-decoration:none}.brand-mark{font:800 34px 'Manrope',sans-serif;background:#fff;color:var(--navy);width:44px;height:44px;border-radius:10px;display:grid;place-items:center}.brand>span:last-child{font-size:24px;font-weight:700;letter-spacing:-1px}.brand small{font-size:8px;letter-spacing:1.8px;display:block;margin-top:4px}.year-lockup{font:800 74px/1 'Manrope',sans-serif;letter-spacing:-6px;margin:50px 0 34px}.year-lockup>span{color:#a4b8df}.year-lockup>div{font:400 15px/1.65 'DM Sans',sans-serif;letter-spacing:0;color:#c4d0d8;margin-top:15px}nav{display:grid;gap:8px}.nav{border:0;border-radius:8px;background:transparent;color:#bfcdd7;display:flex;align-items:center;gap:13px;width:100%;padding:14px 12px;font-size:15px;text-align:left;white-space:nowrap}.nav>span{font-size:22px;width:22px;line-height:1}.nav.active{color:white;background:var(--navy2);box-shadow:inset 3px 0 0 #81a6ff}.nav i{font-style:normal;font-size:12px;margin-left:auto;background:#314f63;padding:3px 6px;border-radius:4px}.sidebar-bottom{margin-top:auto;padding-top:35px;font-size:10px;font-weight:700;letter-spacing:1.2px;color:#c4d0d8}.status-dot{display:inline-block;width:6px;height:6px;background:#91c9a3;border-radius:100%;margin-right:5px}.sidebar-bottom p{font-size:13px;font-weight:400;letter-spacing:0;line-height:1.6;color:#9eb0be}main{margin-left:250px;padding:0 44px;min-height:100vh}.topbar{height:83px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:10px;font-weight:700;letter-spacing:1.6px;color:var(--muted)}.edition{font-size:10px}.edition>span{padding:0 8px;color:#bdc6c9}#app{max-width:1180px;margin:0 auto;min-height:calc(100vh - 156px)}.page-head{padding:38px 0 25px;display:flex;justify-content:space-between;align-items:center;gap:25px}.eyebrow{font-size:11px;letter-spacing:1.8px;font-weight:700;color:var(--blue);margin:0 0 12px}h1,h2,h3{font-family:'Manrope',Arial,sans-serif;letter-spacing:-1px}h1{font-size:34px;line-height:1.25;font-weight:800;margin:0 0 10px}h2{font-size:22px;line-height:1.45;margin:0 0 12px;font-weight:800}h3{font-size:17px;margin:0 0 15px}p{line-height:1.6}.subtitle{margin:0;color:var(--muted);font-size:15px}.head-date{font-size:12px;border:1px solid var(--line);padding:10px 13px;border-radius:6px;background:white;white-space:nowrap}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin:0 0 28px}.stat{padding:19px 22px;background:#fff;border:1px solid var(--line);border-radius:10px}.stat b{font:800 28px 'Manrope',sans-serif;letter-spacing:-1px;display:block;margin-bottom:3px}.stat small{color:var(--muted);font-size:12px}.stat b.blue{color:var(--blue)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;padding-bottom:30px}.panel{background:white;border:1px solid var(--line);border-radius:12px;padding:27px}.panel-top{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:20px}.panel-top h2{margin:0;font-size:19px}.step{background:var(--soft);color:var(--blue);font-size:10px;border-radius:4px;padding:5px 8px;font-weight:700;letter-spacing:1px}.mode-switch{display:flex;gap:10px;margin-bottom:24px}.mode{border:1px solid var(--line);background:white;border-radius:8px;padding:15px;text-align:left;width:50%;color:var(--ink);position:relative}.mode.selected{background:#f4f7ff;border-color:var(--blue);box-shadow:0 0 0 1px var(--blue)}.mode strong{display:block;font-size:15px;margin-bottom:4px}.mode small{font-size:12px;color:var(--muted);display:block;line-height:1.5}.mode.selected:after{content:'✓';position:absolute;right:10px;top:12px;color:var(--blue)}.control-row{display:grid;grid-template-columns:1fr 145px;gap:15px}label{display:block;font-size:13px;font-weight:600;line-height:1.5;margin-bottom:16px}input,select,textarea{width:100%;border:1px solid #cad3d8;background:white;color:var(--ink);border-radius:6px;padding:12px;margin-top:6px;font-size:15px}textarea{resize:vertical;min-height:78px}.checkbox{display:flex;align-items:center;gap:9px;color:var(--muted);font-weight:400;font-size:14px;margin:4px 0 24px}.checkbox input{width:17px;height:17px;margin:0;accent-color:var(--blue)}.primary,.secondary,.danger,.text-button{display:inline-flex;justify-content:center;align-items:center;gap:10px;font-weight:600;font-size:14px;border-radius:7px;padding:12px 18px;min-height:44px}.primary{background:var(--blue);border:1px solid var(--blue);color:white}.secondary{background:white;border:1px solid #cdd5da;color:var(--ink)}.danger{background:#fff5f4;border:1px solid #dfb9b9;color:var(--red)}.text-button{background:transparent;border:0;color:var(--blue);padding:10px 0}.wide{width:100%}.start-button{justify-content:space-between}.micro{font-size:12px;line-height:1.5;color:var(--muted);margin:15px 0 0}.topic-panel{padding:23px}.topic-panel h3{font-size:14px;letter-spacing:0;margin-bottom:19px}.topic-list{display:grid;gap:14px}.topic-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;gap:10px}.topic-row span{max-width:205px}.topic-row b{font-size:11px;background:#f0f2f3;padding:4px 7px;border-radius:4px;font-weight:500}.topic-rule{height:3px;margin-top:7px;border-radius:5px;background:#eef1f4;overflow:hidden}.topic-rule>i{height:100%;display:block;background:#7f9be0}.pending-mini{margin-top:16px;background:#e9eddf;border-color:#dfe5d1}.pending-mini .eyebrow{font-size:10px;color:#687849;letter-spacing:1.2px}.pending-mini h3{font-size:15px;line-height:1.5;margin-bottom:8px;letter-spacing:-.3px}.pending-mini p{font-size:12px;margin:0;color:#5e6e4f}.pending-mini button{font-size:12px;color:#4f622e;padding-bottom:0}.resume{background:#eaf0ff;border:1px solid #cfdbfc;border-radius:8px;padding:15px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.resume p{margin:0;font-size:14px}.resume small{display:block;color:var(--muted);font-size:12px}.editorial{display:flex;gap:18px;padding:24px 0 5px;border-top:1px solid var(--line);margin-top:24px;align-items:start}.editorial>span{font:800 23px 'Manrope',sans-serif;color:#afbdc5}.editorial p{margin:0;font-size:13px;color:var(--muted);line-height:1.6}.editorial b{color:var(--ink)}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{font-size:11px;font-weight:600;background:var(--soft);color:var(--blue);border-radius:4px;padding:6px 9px;letter-spacing:.3px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:12px}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:24px;padding-bottom:30px}.quiz-card{padding:32px}.progress-track{height:4px;background:#edf0f3;border-radius:10px;overflow:hidden;margin-bottom:26px}.progress-track span{height:100%;display:block;background:var(--blue)}.question-meta{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:20px;font-size:12px;color:var(--muted)}.question-text{font-size:25px;line-height:1.5;letter-spacing:-.7px;margin-bottom:27px}.options{display:grid;gap:12px}.answer-option{display:flex;align-items:center;gap:15px;border:1px solid #d7dfe3;border-radius:8px;padding:17px;text-align:left;background:white;color:var(--ink);font-size:16px;line-height:1.5}.letter{width:30px;height:30px;flex:none;display:grid;place-items:center;border-radius:5px;background:#f1f3f4;font-size:13px;font-weight:700}.answer-option.selected{border:2px solid var(--blue);padding:16px;background:#f3f6ff}.answer-option.correct{background:#eef8f0;border:1px solid #8bbba0;color:#195c3d}.answer-option.correct .letter{background:#d5eadc}.answer-option.incorrect{background:#fff1ef;border:1px solid #dda49d;color:#9a3535}.answer-option.incorrect .letter{background:#f5d9d4}.answer-option:disabled{opacity:1}.feedback{border-radius:8px;background:#f0f7f2;border-left:3px solid #639b75;padding:18px 20px;margin-top:24px;font-size:14px}.feedback.bad{background:#fff6f3;border-left-color:#ba7a64}.feedback strong{display:block}.feedback p{margin:7px 0}.source-link{display:inline-flex;font-size:12px;line-height:1.5;gap:6px}.quiz-actions{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:26px;padding-top:21px;gap:10px}.numbers{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.number{height:35px;background:#f4f6f7;border:1px solid transparent;border-radius:5px;color:var(--muted);font-size:12px}.number.answered{background:#dce7ff;color:var(--blue)}.number.active{border:1px solid var(--blue);font-weight:700;color:var(--blue)}.number.ok{background:#dceede;color:#266343}.number.wrong{background:#f6dfdb;color:var(--red)}.session-summary{font-size:13px;color:var(--muted);line-height:1.7;margin:20px 0}.quiz-aside .primary{margin-top:16px}.result-layout{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:center}.score-ring{--pct:0; width:180px;height:180px;border-radius:50%;background:conic-gradient(var(--blue) calc(var(--pct)*1%),#e8ecf2 0);padding:12px;margin:0 auto}.score-inner{background:white;width:100%;height:100%;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-direction:column}.score-inner b{font:800 43px 'Manrope',sans-serif;letter-spacing:-2px}.score-inner span{font-size:13px;color:var(--muted)}.result-facts{display:flex;gap:26px;margin:20px 0 25px;flex-wrap:wrap}.result-facts b{font-size:23px;display:block}.result-facts small{font-size:12px;color:var(--muted)}.action-group{display:flex;gap:10px;flex-wrap:wrap}.list-tools{display:flex;gap:14px;align-items:center;margin:0 0 22px;flex-wrap:wrap}.list-tools input{margin:0;flex:1;min-width:200px}.list-tools select{width:245px;margin:0}.list-tools .checkbox{margin:0;white-space:nowrap}.review-list{display:grid;gap:12px;padding-bottom:30px}.review-card{background:white;border:1px solid var(--line);border-radius:9px;padding:20px 23px}.review-card summary{cursor:pointer;line-height:1.6;font-size:16px;font-weight:500;list-style:none;display:flex;gap:15px;justify-content:space-between;align-items:center}.review-card summary::-webkit-details-marker{display:none}.review-card summary:after{content:'+';color:var(--muted);font-size:22px;font-weight:400}.review-card[open] summary:after{content:'−'}.review-card .chips{margin-bottom:9px}.review-card .explanation{border-top:1px solid var(--line);padding-top:15px;margin-top:18px;font-size:14px;line-height:1.6}.correct-answer{color:var(--green);font-weight:700}.small{font-size:13px;color:var(--muted);line-height:1.6}.bank-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px}.bank-row .prompt{font-weight:500;line-height:1.6;margin:10px 0}.bank-row .action-group{flex-wrap:nowrap}.bank-row.disabled{opacity:.6}.count-caption{font-size:13px;color:var(--muted);margin-bottom:15px}.empty{padding:40px;text-align:center;background:white;border:1px dashed #bdc8cf;border-radius:9px}.empty p{color:var(--muted)}.pending-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.pending-card{border-top:4px solid #9aa875}.pending-date{font-size:12px;display:inline-block;background:#eef1e6;color:#657346;padding:7px 10px;border-radius:4px;margin-bottom:19px}.method{margin:24px 0 35px;border-top:1px solid var(--line);padding:25px 0}.method p{font-size:14px;color:var(--muted);max-width:850px}.method h3{font-size:17px}.error{color:var(--red);font-size:14px}.notice{background:#eef2ff;border:1px solid #d7e0fa;border-radius:7px;padding:14px 18px;margin-bottom:20px;font-size:13px;line-height:1.6}.history{margin-top:24px}.history-row{padding:11px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;font-size:13px;color:var(--muted)}footer{border-top:1px solid var(--line);max-width:1180px;margin:0 auto;display:flex;justify-content:space-between;gap:15px;padding:25px 0;font-size:11px;color:#7b8991}.loading{padding:80px 20px;text-align:center;color:var(--muted)}dialog{border:0;border-radius:12px;padding:28px;max-width:740px;width:calc(100% - 32px);max-height:90vh;color:var(--ink);box-shadow:0 24px 100px #142f4440}dialog::backdrop{background:#142f4480}.dialog-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.dialog-head button{border:0;background:none;font-size:28px;color:var(--muted)}.editor-grid,.editor-options{display:grid;grid-template-columns:1fr 1fr;gap:16px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px}.editor-options label{margin-bottom:5px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--navy);color:white;border-radius:8px;box-shadow:0 5px 25px #142f4440;padding:14px 22px;font-size:14px;z-index:40;display:none;max-width:calc(100% - 32px)}#toast.visible{display:block}.hidden{display:none}
@media(min-width:1600px){main{padding:0 65px}.page-head{padding-top:48px}}
@media(max-width:1150px){.sidebar{width:220px;padding:28px 20px}main{margin-left:220px;padding:0 28px}.workspace{grid-template-columns:minmax(0,1fr) 250px;gap:18px}.panel{padding:23px}.quiz-layout{grid-template-columns:minmax(0,1fr) 210px}.question-text{font-size:23px}.stats{gap:10px}.stat{padding:17px}.page-head h1{font-size:30px}.nav{font-size:14px;padding:13px 10px}}
@media(max-width:960px){.workspace{grid-template-columns:1fr}.home-aside{display:grid;grid-template-columns:1fr 1fr;gap:18px}.pending-mini{margin-top:0}.quiz-layout{grid-template-columns:1fr}.quiz-aside .numbers{grid-template-columns:repeat(10,1fr)}.quiz-aside .session-summary{margin:12px 0}.head-date{display:none}.edition{display:none}.bank-row{grid-template-columns:1fr}.bank-row .action-group{justify-content:flex-end}.question-text{font-size:22px}.result-layout{grid-template-columns:200px 1fr}}
@media(max-width:700px){.sidebar{position:static;width:100%;padding:17px 18px 0}.brand-mark{width:35px;height:35px;font-size:27px}.brand>span:last-child{font-size:21px}.brand small{font-size:7px}.year-lockup,.sidebar-bottom{display:none}nav{display:flex;gap:3px;margin-top:17px;padding-bottom:13px;overflow:auto}.nav{padding:10px 9px;border-radius:6px;font-size:12px;gap:6px;width:auto;flex:none}.nav>span{font-size:17px;width:17px}.nav.active{box-shadow:none;background:#2b4c63}.nav i{display:none}main{margin:0;padding:0 18px}.topbar{height:48px;font-size:9px}.page-head{padding:26px 0 20px}.page-head h1{font-size:27px}.subtitle{font-size:14px}.eyebrow{font-size:10px;margin-bottom:10px}.stats{grid-template-columns:repeat(2,1fr);margin-bottom:20px;gap:10px}.stat{padding:14px 16px}.stat b{font-size:25px}.workspace{gap:16px}.panel{padding:21px}.panel-top h2{font-size:18px}.mode-switch{gap:10px;margin-bottom:20px}.mode{padding:13px 10px}.mode strong{font-size:14px}.mode small{font-size:11px}.mode.selected:after{right:7px;top:8px;font-size:11px}.control-row{grid-template-columns:1fr 125px;gap:12px}select{font-size:14px;padding:12px 8px}.home-aside{grid-template-columns:1fr}.topic-list{gap:10px}.topic-row{font-size:13px}.topic-row span{max-width:none}.topic-rule{display:none}.editorial{margin-top:20px;padding-top:18px}.quiz-card{padding:22px 18px}.quiz-header{align-items:flex-start}.quiz-header h1{font-size:24px}.quiz-header .secondary{font-size:12px;padding:9px 12px}.question-meta{flex-wrap:wrap;gap:9px}.question-text{font-size:21px;line-height:1.45}.answer-option{padding:14px 12px;font-size:15px;gap:12px}.answer-option.selected{padding:13px 11px}.quiz-actions{gap:8px}.quiz-actions button{font-size:12px;padding:11px 12px}.quiz-aside .numbers{grid-template-columns:repeat(8,1fr)}.result-layout{grid-template-columns:1fr;text-align:center;gap:25px}.score-ring{width:155px;height:155px}.result-facts{justify-content:center;gap:23px}.action-group{justify-content:center}.list-tools{gap:10px}.list-tools input,.list-tools select{width:100%;flex:1;min-width:100%}.list-tools .checkbox{margin-top:5px}.review-card{padding:17px}.review-card summary{font-size:15px}.bank-row .action-group{justify-content:flex-start}.pending-grid{grid-template-columns:1fr}.resume{align-items:start;flex-wrap:wrap}.editor-grid,.editor-options{grid-template-columns:1fr;gap:0}dialog{padding:22px}footer{font-size:10px;flex-direction:column;gap:6px;padding:20px 0}.head-date{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* iPhone: readable form controls and comfortable touch targets. */
button,summary{touch-action:manipulation}
.brand-official{background:#fff;border-radius:10px;padding:6px 8px;width:100%;max-width:210px;box-shadow:0 2px 10px #00000012}
.brand-official img{display:block;width:100%;height:auto;object-fit:contain}
.brand-caption{font-size:9px;letter-spacing:1.8px;font-weight:700;color:#c4d0d8;margin:12px 0 0;text-align:center;max-width:210px}
.footer-brand{display:flex;align-items:center;gap:9px}
.footer-brand img{object-fit:contain;flex:none}
@media(max-width:700px){
 .brand-official{max-width:205px;padding:4px 7px}
 .brand-caption{display:none}
 .sidebar{padding-top:max(17px,env(safe-area-inset-top));padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right))}
 main{padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right));padding-bottom:env(safe-area-inset-bottom)}
 input,select,textarea{font-size:16px;min-height:48px}
 .control-row{grid-template-columns:minmax(0,1fr) 105px}
 .nav,.checkbox,.dialog-head button{min-height:44px}
 .checkbox input{min-height:0;flex:none}
 .answer-option{font-size:16px;min-height:56px}
 .quiz-actions{flex-wrap:wrap}
 .quiz-actions button{min-height:48px;flex:1;min-width:100px;font-size:14px}
 .quiz-aside .numbers{grid-template-columns:repeat(5,minmax(0,1fr))}
 .number{min-height:44px;height:auto;font-size:14px}
 .feedback{font-size:16px;padding:17px 16px}
 .source-link{font-size:14px;overflow-wrap:anywhere}
 dialog{max-height:85dvh}
}
/* Keep navigation within reach on a vertical phone, including after feedback. */
@media(max-width:700px){
 .quiz-active .sidebar{padding-bottom:12px}
 .quiz-active .brand-official{max-width:150px}
 .quiz-active .sidebar nav,.quiz-active .topbar,.quiz-active .page-head{display:none}
 .quiz-active main{padding-top:16px;padding-bottom:calc(96px + env(safe-area-inset-bottom))}
 .quiz-active .quiz-card{scroll-margin-top:12px}
 .quiz-active .quiz-actions{position:fixed;inset:auto 0 0;z-index:20;display:grid;grid-template-columns:1fr 1fr 1.2fr;gap:8px;margin:0;padding:12px max(12px,env(safe-area-inset-right)) calc(12px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 22px #142f4414}
 .quiz-active .quiz-actions button{min-width:0;min-height:48px;padding:10px 8px;font-size:14px;line-height:1.3}
 .quiz-active #toast{bottom:calc(90px + env(safe-area-inset-bottom))}
}