@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{--paper:#f7f8f4;--card:#fff;--ink:#213735;--muted:#6a7875;--dark:#172d2b;--green:#d8ecc8;--accent:#336b55;--line:#e2e8df;--red:#a33d3d;--redbg:#fff2ee;--radius:18px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',system-ui,sans-serif;font-size:15px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,main:focus-visible{outline:3px solid #759b37;outline-offset:4px}a{color:inherit}.skip-link{position:fixed;left:20px;top:-100px;z-index:20;background:white;padding:10px}.skip-link:focus{top:15px}.sidebar{position:fixed;inset:0 auto 0 0;width:248px;background:var(--dark);color:#ecf3e9;display:flex;flex-direction:column;padding:32px 23px;z-index:5}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:700;font-size:20px;letter-spacing:-.7px}.brand-mark{height:41px;width:41px;border:1px solid #678273;border-radius:11px;background:#29453d;display:flex;align-items:center;justify-content:center;font-family:Manrope,system-ui,sans-serif;font-size:26px;color:#e3f5b9}.brand-mark span{font-size:19px;margin-top:10px;margin-left:-2px}.brand-caption{display:block;font-size:6.8px;font-weight:500;letter-spacing:1px;color:#9cafa6;margin-top:2px}.course-tag{border-bottom:1px solid #324844;padding:35px 6px 18px;font-size:10px;color:#aabdb3;letter-spacing:1.6px;display:flex;justify-content:space-between}.course-tag span{color:#ecf3e9;letter-spacing:1px}.sidebar nav{padding:24px 0;display:grid;gap:8px}.nav-item{border:0;background:none;color:#bbcdc2;text-align:left;display:flex;align-items:center;gap:13px;padding:13px 14px;border-radius:9px;font-size:13px;font-weight:500}.nav-item.active{background:#dceccf;color:#213a30}.nav-item:hover:not(.active){background:#29423c;color:white}.nav-icon{font-size:21px;line-height:1}.nav-count{margin-left:auto;font-size:10px;border-radius:5px;background:#435c4b;padding:1px 6px;color:white}.nav-item.active .nav-count{background:#638067}.side-note{margin-top:auto;background:#233c35;border:1px solid #3b5244;border-radius:14px;padding:19px}.small-label{font-size:9px;letter-spacing:1.5px;font-weight:600;color:#b6d7a1}.side-note h3{font-size:18px;font-family:Manrope,sans-serif;font-weight:600;margin:13px 0 9px;letter-spacing:-.5px}.side-note p{color:#b3c4b8;font-size:12px;line-height:1.8;margin:0}.note-line{height:1px;background:#3a5346;margin:17px 0}.side-meta{font-size:9px;letter-spacing:1px;line-height:2;color:#a9b9ab}.sidebar-bottom{margin-top:23px;color:#97ad9f;font-size:10px;display:flex;align-items:center;gap:7px}.status-dot{width:6px;height:6px;border-radius:50%;background:#9aba70;display:inline-block;flex-shrink:0}.workspace{margin-left:248px;min-height:100vh}.topbar{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 44px}.breadcrumb{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:12px}.breadcrumb span{color:#b4beb6}.breadcrumb strong{font-weight:500;color:var(--ink)}.subject-pill{font-size:10px;border:1px solid var(--line);border-radius:30px;padding:7px 13px;display:flex;align-items:center;gap:7px;background:white}main{max-width:1270px;padding:38px 44px 40px;margin:auto}.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:700;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:8px}.eyebrow:before{content:'';height:1px;width:24px;background:var(--accent)}h1,h2,h3{font-family:Manrope,system-ui,sans-serif;letter-spacing:-1px}h1{font-size:36px;line-height:1.25;font-weight:700;margin:0 0 10px}h2{font-size:22px;margin:0;font-weight:700}h3{font-size:17px;margin:0;letter-spacing:-.5px}.lead{font-size:13px;color:var(--muted);margin:0}.welcome-row{display:flex;align-items:flex-start;justify-content:space-between;gap:22px;margin-bottom:28px}.date-note{padding-top:13px;display:flex;align-items:center;gap:8px;color:var(--muted);font-size:11px;white-space:nowrap}.date-note span{display:inline-block;height:24px;width:24px;background:#e6ecd9;border-radius:50%;text-align:center;line-height:24px;color:var(--accent)}.hero{display:grid;grid-template-columns:1fr 210px;gap:20px;background:#e7eddd;border:1px solid #d7e0ca;padding:26px 30px;border-radius:var(--radius);position:relative;overflow:hidden;margin-bottom:20px}.hero h2{font-size:25px;line-height:1.35;margin:9px 0}.hero p{max-width:435px;font-size:12px;color:#5c705c;margin:0 0 18px}.hero .eyebrow{font-size:9px;color:#637856}.hero .eyebrow:before{background:#637856}.button{background:var(--dark);border:1px solid var(--dark);border-radius:9px;color:white;padding:11px 18px;font-size:12px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:44px;text-decoration:none}.button:hover:not(:disabled){background:#2e5145}.button.secondary{background:white;color:var(--ink);border-color:var(--line)}.button.secondary:hover{background:#eef3e9}.button.ghost{background:transparent;color:var(--ink);border-color:#bacdb0}.hero-aside{display:flex;flex-direction:column;align-items:center;justify-content:center;border-left:1px solid #cbd6bc}.progress-ring{height:122px;width:122px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--progress)*1%),#cedac1 0);padding:9px;position:relative}.ring-inner{height:100%;width:100%;border-radius:50%;background:#e7eddd;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring-inner strong{font-size:29px;font-family:Manrope,sans-serif;font-weight:700;line-height:1.3}.ring-inner span{font-size:9px;color:#64745f}.hero-aside p{font-size:10px;text-align:center;margin:9px 0 0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin-bottom:34px}.stat{border:1px solid var(--line);background:white;border-radius:12px;padding:17px 20px;display:flex;align-items:center;gap:13px}.stat-icon{width:35px;height:35px;border-radius:9px;display:flex;align-items:center;justify-content:center;background:#eff2e9;color:#64845d;font-size:19px}.stat:nth-child(2) .stat-icon{background:#f4efe4;color:#ab8b53}.stat:nth-child(3) .stat-icon{background:#e9edf3;color:#64799c}.stat small{display:block;color:var(--muted);font-size:10px}.stat strong{font-size:21px;font-family:Manrope,sans-serif;line-height:1.3}.stat strong span{font-size:11px;font-weight:400;color:#98a298}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 18px}.section-heading p{margin:5px 0 0;font-size:12px;color:var(--muted)}.section-heading .text-button{font-size:11px}.filters{display:flex;gap:11px;margin-bottom:22px;align-items:center;flex-wrap:wrap}.segmented{display:flex;align-items:center;border:1px solid var(--line);background:#edf0e8;border-radius:8px;padding:3px}.segmented button{border:0;background:transparent;padding:7px 13px;border-radius:5px;font-size:11px;color:var(--muted);white-space:nowrap}.segmented button.active{background:white;box-shadow:0 1px 4px #203a2510;color:var(--ink);font-weight:600}.search-box{margin-left:auto;position:relative;flex:1;max-width:240px;min-width:140px}.search-box input{border:1px solid var(--line);background:white;border-radius:8px;padding:10px 12px 10px 32px;font-size:11px;width:100%;min-height:40px}.search-box:before{content:'⌕';position:absolute;left:12px;top:3px;color:var(--muted);font-size:23px}select{background:white;border:1px solid var(--line);border-radius:8px;padding:9px 9px;font-size:11px;min-height:40px;color:var(--ink)}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.topic-card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:14px;padding:20px;position:relative;transition:border-color .15s,transform .15s}.topic-card:hover{border-color:#9eb78f;transform:translateY(-2px)}.topic-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.topic-icon{height:34px;width:34px;border-radius:9px;background:#eef3e8;display:flex;align-items:center;justify-content:center;color:#5c8250;font-weight:600;font-size:15px;font-family:monospace}.topic-card:nth-child(4n+2) .topic-icon{background:#f5efe2;color:#a18345}.topic-card:nth-child(4n+3) .topic-icon{background:#e9edf4;color:#69809e}.topic-card:nth-child(4n) .topic-icon{background:#f4eae6;color:#a57c6b}.paper-badge{font-size:8px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:3px 6px}.topic-card h3{font-size:15px;font-weight:700;margin-bottom:6px}.topic-card p{font-size:11px;color:var(--muted);margin:0 0 15px;min-height:36px;line-height:1.65}.topic-meta{font-size:9px;color:var(--muted);display:flex;align-items:center;gap:8px;margin-top:auto;margin-bottom:15px}.meta-dot{height:3px;width:3px;background:#a9b5a2;border-radius:50%}.tiny-progress{height:3px;background:#edf0e9;border-radius:6px;overflow:hidden}.tiny-progress div{height:100%;background:#91b478}.topic-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:10px}.topic-bottom small{font-size:9px;color:var(--muted)}.start-topic{background:none;border:0;color:var(--accent);font-size:10px;font-weight:700;min-height:36px;padding:4px 0 4px 12px}.start-topic:hover{text-decoration:underline}.resume-banner{background:#fff7e5;border:1px solid #e5d4a8;border-radius:12px;padding:14px 18px;margin-bottom:22px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px}.resume-banner strong{display:block;color:#715b31}.resume-banner span{font-size:11px;color:#8b7650}.text-button{border:0;background:transparent;color:var(--accent);text-decoration:underline;text-underline-offset:3px;font-size:12px;padding:5px}.footer{max-width:1270px;margin:auto;padding:16px 44px 27px;border-top:1px solid var(--line);font-size:9px;color:#8c978b;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.footer span{margin-left:auto}.footer button{font-size:9px;color:#8c978b}.quiz-container{max-width:820px;margin:auto}.back-button{display:inline-flex;gap:8px;align-items:center;background:none;border:0;color:var(--muted);font-size:11px;padding:0 0 22px;min-height:38px}.quiz-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px}.quiz-header h2{font-size:21px}.quiz-header span{font-size:11px;color:var(--muted)}.quiz-progress{height:5px;border-radius:5px;background:#e1e8db;margin-bottom:25px;overflow:hidden}.quiz-progress div{background:var(--accent);height:100%;transition:width .2s}.question-card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:30px}.question-labels{display:flex;align-items:center;gap:8px;margin-bottom:16px}.difficulty-badge{font-size:9px;background:#edf5e6;color:#538343;border:1px solid #d9e9cb;border-radius:5px;padding:3px 7px}.difficulty-badge.medium{background:#fcf3dd;border-color:#eddfb5;color:#957641}.difficulty-badge.hard{background:#f8ebe6;border-color:#ecd6ce;color:#9e655a}.question-title{font-size:22px;line-height:1.5;letter-spacing:-.5px;margin:0 0 8px}.question-hint{font-size:11px;color:var(--muted);margin:0 0 22px}.answers{border:0;margin:0;padding:0;display:grid;gap:10px}.answer-option{border:1px solid var(--line);border-radius:11px;padding:14px 16px;display:flex;gap:13px;align-items:flex-start;cursor:pointer;background:#fff;position:relative;line-height:1.7}.answer-option:hover{background:#f7faf3;border-color:#b6c7aa}.answer-option:has(input:checked){border-color:var(--accent);background:#f0f6e9}.answer-option:has(input:focus-visible){outline:3px solid #759b37;outline-offset:3px}.answer-option input{margin:6px 0 0;accent-color:var(--accent);width:17px;height:17px;flex-shrink:0}.option-letter{font-size:10px;font-weight:600;border:1px solid var(--line);border-radius:5px;padding:1px 6px;line-height:1.7;background:#f7f8f4;margin-right:9px}.answer-option .option-text{font-size:13px}.answer-option.correct{border-color:#8db478;background:#f0f8e9}.answer-option.incorrect-selected{border-color:#d6a191;background:var(--redbg)}.option-explanation{margin-top:10px;padding-top:9px;border-top:1px solid #dce3d8;font-size:11px;color:#5d7160;line-height:1.8}.option-explanation strong{display:block;color:#426435;font-size:10px;margin-bottom:3px}.incorrect-selected .option-explanation{color:#91534a;border-color:#e7cec4}.incorrect-selected .option-explanation strong{color:var(--red)}.answer-option.wrong .option-explanation strong{color:#8c6c48}.option-explanation .chosen{display:inline;font-weight:400;color:var(--muted);margin-left:6px}.question-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:24px}.question-actions span{font-size:10px;color:var(--muted)}.feedback{padding:17px 19px;border-radius:11px;background:#edf6e5;border:1px solid #d5e7c8;margin-top:20px;line-height:1.7}.feedback.incorrect{background:#fff2e8;border-color:#ead2bb}.feedback strong{font-size:15px;display:block;letter-spacing:-.2px}.feedback p{margin:4px 0 0;font-size:12px;color:var(--muted)}.quiz-tips{font-size:11px;text-align:center;color:var(--muted);margin-top:19px}.result-card{background:white;border:1px solid var(--line);border-radius:20px;padding:40px;text-align:center}.result-symbol{width:65px;height:65px;display:flex;align-items:center;justify-content:center;background:#e8f3da;border-radius:50%;font-size:30px;margin:0 auto 19px;color:var(--accent)}.result-card h1{font-size:30px}.result-score{font-family:Manrope,sans-serif;font-size:63px;font-weight:700;letter-spacing:-3px;margin:16px 0}.result-score span{font-size:25px;color:#9aa697;font-weight:400;letter-spacing:-1px}.result-card .lead{max-width:420px;margin:0 auto 22px}.actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.result-summary{border-top:1px solid var(--line);margin:25px 0 0;padding-top:20px;text-align:left}.review-row{display:flex;align-items:flex-start;gap:11px;padding:13px 0;border-bottom:1px solid #edf0e8;font-size:12px}.review-row span:first-child{width:20px;flex-shrink:0;color:var(--accent);font-weight:700}.review-row span:first-child.missed{color:var(--red)}.review-row small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.empty-state{border:1px dashed #c4d3b7;border-radius:18px;background:#f0f5e9;padding:40px;text-align:center;grid-column:1/-1}.empty-state h2{margin-bottom:8px}.empty-state p{color:var(--muted);font-size:13px;margin:0 0 20px}.mistake-row{background:white;border:1px solid var(--line);padding:18px 21px;border-radius:12px;margin-bottom:10px;display:flex;align-items:center;justify-content:space-between;gap:18px}.mistake-row h3{font-size:13px;line-height:1.7;letter-spacing:0}.mistake-row small{color:var(--muted);font-size:10px}.mistake-row button{white-space:nowrap}.page-actions{display:flex;align-items:center;gap:12px;margin:22px 0}.sr-only{position:absolute;height:1px;width:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}dialog{border:1px solid var(--line);border-radius:18px;max-width:430px;padding:28px;color:var(--ink);box-shadow:0 20px 80px #10251d40}dialog::backdrop{background:#152c2470}dialog h2{font-size:22px}dialog p{font-size:13px;color:var(--muted);margin:12px 0 22px}.noscript{padding:30px;position:fixed;inset:100px 30px auto auto;background:white;border:2px solid var(--red)}
@media(min-width:1450px){.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:1100px){.sidebar{width:220px;padding:27px 17px}.workspace{margin-left:220px}main{padding:30px 28px}.topbar{padding:0 28px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1fr 150px;padding:23px}.date-note{display:none}.footer{padding-left:28px;padding-right:28px}.stat{padding:13px}.stats{gap:9px}}
@media(max-width:760px){.sidebar{position:static;width:100%;padding:17px 20px;display:block}.brand{font-size:20px}.brand-caption{font-size:7px}.course-tag,.side-note,.sidebar-bottom{display:none}.sidebar nav{padding:17px 0 0;display:flex;gap:7px}.nav-item{padding:9px 10px;font-size:11px;flex:1;justify-content:center;gap:6px;white-space:nowrap}.nav-icon{font-size:17px}.nav-count{margin-left:2px}.workspace{margin-left:0}.topbar{height:52px;padding:0 20px}.subject-pill{font-size:8px;padding:4px 8px}.breadcrumb{font-size:10px;gap:8px}main{padding:25px 20px}h1{font-size:29px}.welcome-row{margin-bottom:20px}.hero{grid-template-columns:1fr 110px;gap:12px;padding:20px}.hero h2{font-size:20px}.hero p{font-size:11px}.hero .button{font-size:11px;padding:10px 12px}.hero-aside{padding-left:13px}.progress-ring{height:92px;width:92px;padding:7px}.ring-inner strong{font-size:23px}.ring-inner span{font-size:8px}.stats{gap:8px;margin-bottom:27px}.stat{padding:12px 8px;justify-content:center;gap:0}.stat-icon{display:none}.stat strong{font-size:20px}.stat small{font-size:9px}.topic-grid{gap:12px}.topic-card{padding:16px}.topic-card h3{font-size:13px}.topic-card p{font-size:10px}.topic-icon{height:30px;width:30px}.section-heading h2{font-size:19px}.section-heading p{font-size:11px}.filters{gap:8px}.search-box{max-width:none;margin-left:0;flex-basis:100%}.segmented{flex:1}.segmented button{flex:1;padding:7px 9px}.footer{padding:15px 20px;line-height:1.7}.footer span{margin-left:0}.question-card{padding:22px 18px}.question-title{font-size:19px}.quiz-header h2{font-size:17px}.answer-option{padding:13px 11px;gap:9px}.answer-option .option-text{font-size:12px}.option-letter{margin-right:5px}.result-card{padding:29px 20px}.result-card h1{font-size:25px}.question-actions>span{max-width:120px}.resume-banner{align-items:flex-start}.mistake-row{padding:15px;gap:12px}.mistake-row .button{padding:8px 11px;font-size:10px}}
@media(max-width:410px){.topic-grid{grid-template-columns:1fr}.hero{grid-template-columns:1fr 92px;padding:17px}.progress-ring{height:78px;width:78px}.hero-aside{padding-left:8px}.hero-aside p{font-size:8px}.ring-inner strong{font-size:20px}.hero h2{font-size:18px}.question-actions{align-items:flex-start}.brand-caption{font-size:6.5px}}
.answer-option.incorrect-selected:has(input:checked){border-color:#d6a191;background:var(--redbg)}
.syllabus-banner{padding:18px 20px;background:white;border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:28px}.syllabus-banner strong{display:block;font-size:13px}.syllabus-banner span{font-size:10px;color:var(--muted)}.syllabus-banner .actions{gap:8px}.syllabus-banner .button{font-size:10px;padding:9px 12px}.coverage-note{background:#eaf1e0;border:1px solid #d5e2c7;border-radius:15px;padding:23px;margin:25px 0}.coverage-note strong{font-size:14px}.coverage-note p{font-size:12px;line-height:1.9;color:#5b6f59;margin:8px 0 18px}.coverage-note .actions{justify-content:flex-start}.coverage-list{display:grid;gap:12px}.coverage-section{border:1px solid var(--line);border-radius:12px;background:white;overflow:hidden}.coverage-section summary{list-style:none;display:flex;gap:15px;align-items:center;cursor:pointer;padding:19px 21px}.coverage-section summary::-webkit-details-marker{display:none}.coverage-code{padding:5px;background:#eef3e8;color:#53714c;border-radius:7px;font-size:12px;min-width:45px;text-align:center}.coverage-section summary strong{font-size:14px;display:block}.coverage-section summary small{font-size:10px;color:var(--muted);display:block;margin-top:4px}.expand-marker{margin-left:auto;font-size:23px;color:var(--muted)}.coverage-section[open] .expand-marker{transform:rotate(45deg)}.coverage-body{padding:0 21px 21px}.coverage-skills{border-top:1px solid var(--line);padding-top:8px}.coverage-skill{display:flex;gap:10px;align-items:center;font-size:12px;padding:9px 0;border-bottom:1px solid #eff2eb}.coverage-skill .text-button{font-size:10px;margin-left:auto;white-space:nowrap}.skill-done{color:#4a793b;font-weight:700}.skill-pending{color:#879281}.written-target{background:#f5f7f0;padding:16px;border-radius:10px;margin:16px 0}.written-target strong{font-size:9px;color:var(--accent);letter-spacing:1px}.written-target p{font-size:12px;color:var(--muted);margin:7px 0 13px}.written-target label{font-size:11px;display:flex;align-items:flex-start;gap:8px}.written-target input{margin-top:3px;accent-color:var(--accent)}.question-code{font-size:12px;padding:20px;background:#f1f4eb;border:1px solid var(--line);border-radius:10px;overflow:auto;line-height:1.9;white-space:pre-wrap;margin:0 0 22px;overflow-wrap:anywhere}.question-visual{background:#f7f9f3;padding:16px;border:1px solid var(--line);border-radius:12px;margin:0 0 22px}.question-visual svg{display:block;width:100%;max-height:220px}.gate-single svg{height:120px}.gate-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.gate-gallery svg{max-height:135px}
@media(max-width:760px){.sidebar nav{flex-wrap:wrap}.nav-item{flex-basis:40%}.syllabus-banner{align-items:flex-start;flex-direction:column}.syllabus-banner .actions{justify-content:flex-start}.coverage-section summary{padding:15px;gap:11px}.coverage-section summary strong{font-size:12px}.coverage-section summary small{font-size:9px}.coverage-body{padding:0 15px 15px}.coverage-skill{font-size:11px}.coverage-note{padding:18px}.coverage-note strong{font-size:13px}.coverage-note .actions{gap:10px}.gate-gallery{grid-template-columns:repeat(2,1fr)}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}