:root{--blue:#2456dd;--ink:#17213c;--muted:#626c82;--line:#dce3ef;--paper:#fff;--back:#f3f6fb;--yellow:#ffdc67;font-family:system-ui,-apple-system,"Noto Sans Devanagari","Mangal",sans-serif;color:var(--ink);background:var(--back);font-size:16px}*{box-sizing:border-box}body{margin:0;line-height:1.65}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #e6a619;outline-offset:4px}a{color:var(--blue);text-underline-offset:4px}.skip{position:fixed;left:20px;top:-80px;background:#fff;padding:12px;z-index:9}.skip:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:236px;background:#fff;border-right:1px solid var(--line);padding:28px 18px;display:flex;flex-direction:column;overflow:auto}.brand{display:flex;align-items:center;gap:11px;padding:0 9px}.brand-icon{background:var(--blue);color:var(--yellow);height:45px;width:45px;border-radius:13px;display:grid;place-items:center;font-size:30px;line-height:1}.brand strong{font-size:25px;display:block}.brand small{font-size:12px;color:var(--muted)}.side-label{font-size:14px;font-weight:650;color:var(--muted);margin:38px 14px 12px}#subjects{display:flex;flex-direction:column;gap:7px}.subject{border:0;background:transparent;display:flex;align-items:center;text-align:left;gap:13px;padding:12px 14px;border-radius:10px;color:var(--muted);width:100%;font-weight:600}.subject span{width:31px;display:grid;place-items:center;font-size:21px}.subject:hover{background:#f0f4ff}.subject.active{color:var(--blue);background:#edf2ff;box-shadow:inset 3px 0 var(--blue)}.sidebar-foot{margin-top:auto;padding:34px 14px 0}.badge{background:#edf2ff;color:var(--blue);padding:5px 10px;border-radius:6px;font-size:14px}.sidebar-foot p{font-size:22px;line-height:1.7}.sidebar-foot 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var(--line);gap:22px;margin-bottom:26px}.modes button{background:none;border:0;color:var(--muted);padding:12px 2px;white-space:nowrap;font-weight:600;border-bottom:3px solid transparent}.modes button.active{color:var(--blue);border-bottom-color:var(--blue)}.study-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:23px;align-items:start}.card{background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden}.card-pad{padding:25px}.lesson-top{display:flex;justify-content:space-between;gap:15px;align-items:flex-start;padding:21px 25px;border-bottom:1px solid var(--line)}.field{flex:1}.field label{display:block;font-size:14px;font-weight:600;color:var(--muted);margin-bottom:7px}.field select{width:100%;max-width:400px;min-width:0;padding:9px 12px;border:1px solid #cbd5e5;background:#fff;border-radius:8px;color:var(--ink)}.counter{font-size:14px;color:var(--muted);padding-top:30px;white-space:nowrap}.concept{border-left:3px solid 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12px}.start-test{max-width:720px;margin:auto;text-align:center;padding:38px}.start-test .test-icon{font-size:37px;color:var(--blue);background:#edf2ff;border-radius:14px;width:70px;height:70px;margin:0 auto 18px;display:grid;place-items:center}.start-test h2{font-size:26px;margin:10px}.start-test p{color:var(--muted)}.test-details{display:flex;justify-content:center;gap:25px;margin:28px 0}.test-details div{padding:0 15px}.test-details strong{display:block;font-size:23px}.test-details span{font-size:14px;color:var(--muted)}.test-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px}.review-item{padding:20px 0;border-bottom:1px solid var(--line)}.review-item h3{font-size:18px;margin:5px 0 10px}.review-item .badge{font-size:13px}.review-item details summary{color:var(--blue);cursor:pointer;margin-top:10px}.results-score{font-size:50px;color:var(--blue);font-weight:750}.sources-intro{border-left:4px solid #d49a15;background:#fff9e8;padding:18px 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small{font-size:13px;display:block;margin-top:14px;color:var(--muted)}footer{font-size:13px;color:var(--muted);margin-top:27px;max-width:900px}.loading,.load-error{padding:40px;text-align:center}.test-warning{font-size:14px;color:var(--muted);margin:10px 0}.print-button{margin-left:auto}@media(max-width:1150px){.sidebar{width:207px}.workspace{margin-left:207px}main{padding:27px}.topbar{padding:20px 27px}.study-layout{grid-template-columns:minmax(0,1fr) 240px}.card-pad{padding:22px}.options{grid-template-columns:1fr}}@media(max-width:900px){.sidebar{position:static;width:auto;display:block;padding:15px 20px;border-right:0;border-bottom:1px solid var(--line)}.brand{padding:0}.brand strong{font-size:23px}.brand small{font-size:13px}.brand-icon{height:39px;width:39px}.side-label,.sidebar-foot{display:none}#subjects{flex-direction:row;overflow:auto;margin-top:15px;padding-bottom:3px;gap:6px}.subject{width:auto;flex-shrink:0;padding:9px 12px;font-size:14px;gap:7px}.subject span{font-size:18px;width:24px}.subject.active{box-shadow:none}.workspace{margin-left:0}.topbar{padding:12px 20px}.study-layout{grid-template-columns:minmax(0,1fr) 235px}.heading{margin-bottom:17px}.modes{gap:20px;margin-bottom:20px}}@media(max-width:680px){main{padding:22px 16px}.topbar{font-size:13px}.topbar>span:first-child{display:none}.session{justify-content:space-between;width:100%}.heading{align-items:flex-start}.heading h1{font-size:26px}.heading p:last-child{font-size:14px}.chapter-count strong{font-size:28px}.chapter-count span{font-size:12px}.modes{gap:15px;overflow:auto}.modes button{font-size:14px;padding-top:10px}.study-layout{display:flex;flex-direction:column;gap:20px}.study-layout>.card{width:100%}.aside-stack{width:100%;grid-template-columns:1fr}.daily{display:none}.card-pad{padding:21px 18px}.lesson-top{padding:17px 18px}.lesson-footer{padding:16px 18px}.counter{font-size:13px}.question{font-size:20px}.options{grid-template-columns:1fr}.option{padding:12px}.option.selected{padding:11px}.actions>.primary{flex:1}.actions>.secondary{flex:1}.concept{padding:13px}.concept p{font-size:15px}.year-list{grid-template-columns:1fr}.start-test{padding:27px 18px}.test-details{gap:10px}.test-details div{padding:0 8px}.resources a{width:100%}.test-top{align-items:flex-start}.mini-card{display:none}footer{line-height:1.8}.test-top .secondary{font-size:14px;padding:7px 11px}}@media print{.sidebar,.topbar,.modes,.aside-stack,.actions,.lesson-footer,.notebook,.print-button{display:none!important}.workspace{margin:0}main{padding:0}.study-layout{display:block}.card{border:0}.steps li{break-inside:avoid}body{background:#fff}.heading{margin-bottom:10px}}

.option:disabled{opacity:1}

.brand strong{font-size:20px;line-height:1.35}.brand-icon{flex-shrink:0}

/* Focused classroom layout */
:root{--blue:#3155d9;--ink:#172648;--muted:#596981;--line:#e0e7f1;--back:#f2f5fb;--yellow:#ffd76b}
body{line-height:1.75}.sidebar{width:256px;padding:30px 18px;background:#12254b;border:0;color:#fff}.brand{gap:12px;padding:0 6px}.brand-icon{background:#ffd76b;color:#12254b;border-radius:14px;width:46px;height:46px}.brand strong{font-size:20px;letter-spacing:-.4px}.brand small{color:#bbc9e2;font-size:13px}.side-label{color:#aebfdf;font-size:14px;margin:35px 12px 12px}.subject{color:#dce5f6;padding:13px 14px;border-radius:12px;gap:12px;min-height:54px}.subject .subject-icon{width:34px;height:34px;border-radius:9px;background:#fff;font-size:21px;flex-shrink:0}.subject .subject-name{display:block;width:auto;font-size:16px;white-space:nowrap}.subject:hover{background:#243b64}.subject.active{background:#fff;color:#172648;box-shadow:none}.sidebar-foot{padding:30px 12px 0}.sidebar-foot .badge{background:#2b4169;color:#f4d984}.sidebar-foot p{font-size:22px;color:#fff}.sidebar-foot small{color:#b8c7df;font-size:14px}.workspace{margin-left:256px}.topbar{background:#fff;padding:18px 36px;font-size:14px}.session b{background:#eef2ff;color:#3155d9;padding:4px 12px;border-radius:7px}main{padding:30px 36px;max-width:1390px}.heading{margin-bottom:23px}h1{font-size:clamp(28px,3vw,38px);letter-spacing:0;line-height:1.55}.heading p:last-child{max-width:690px}.chapter-count{background:#e8edff;border:1px solid #dce3fc;border-radius:14px;padding:12px 19px;text-align:center}.chapter-count strong{font-size:30px}.chapter-count span{font-size:14px}.modes{background:#e7edf7;border:0;border-radius:12px;padding:5px;gap:5px;margin-bottom:24px;width:fit-content;max-width:100%}.modes button{padding:10px 20px;border:0;border-radius:9px;font-size:16px;min-height:46px}.modes button.active{background:#fff;color:var(--blue);box-shadow:0 2px 6px #243d6810}.study-layout{grid-template-columns:minmax(0,1fr) 270px;gap:24px}.card{border-radius:18px;box-shadow:0 4px 20px #17264804}.lesson-top{background:#fafbff;padding:22px 26px;align-items:center}.field label{color:var(--ink);font-size:14px}.field select{max-width:none;padding:11px 13px;min-height:48px;border-radius:10px}.counter{padding-top:24px;text-align:right;font-size:15px}.counter b{font-size:23px;color:var(--blue)}.counter span{display:block;font-size:12px;color:var(--muted)}.chapter-track{height:4px;background:#e9eef8}.chapter-track span{display:block;height:100%;background:var(--blue);transition:width .2s}.card-pad{padding:26px}.concept{background:#edf2ff;border-left:4px solid var(--blue);padding:17px 19px;border-radius:0 12px 12px 0}.concept h2{font-size:16px}.concept p{font-size:16px}.question-meta{font-size:14px}.question-number{border-radius:6px}.question{font-size:23px;line-height:1.8;margin:17px 0 22px}.options{gap:12px}.option{border-radius:12px;min-height:64px;padding:14px 16px;font-size:17px}.option.selected{padding:13px 15px}.option-letter{background:#edf1f8;border-radius:8px;min-width:32px;height:32px}.option.selected .option-letter{background:var(--blue);color:white}.primary,.secondary{border-radius:10px;padding:11px 18px;min-height:46px;font-size:16px}.actions{gap:10px;margin-top:25px}.notebook{padding-top:6px}.notebook summary{font-size:14px}.lesson-footer{background:#fafbff;padding:18px 26px}.daily{background:#3155d9;box-shadow:0 8px 20px #3155d91a}.daily h2{font-size:23px}.daily li{font-size:16px}.daily small{font-size:14px;line-height:1.75}.progress-card h2,.mini-card h2{font-size:18px}.mini-stats span{font-size:14px}.mini-card p{font-size:16px}progress{height:10px}.hint,.feedback,.answer-box{border-radius:12px}.steps li{line-height:1.85}.resources a{font-size:16px}.paper-links a{font-size:16px;padding:8px 13px}.paper-year h3 span{font-size:14px}.start-test{padding:42px;box-shadow:0 8px 30px #17264808}.start-test p{font-size:17px}footer{font-size:14px;line-height:1.8}.option:focus-visible{outline:3px solid #daa500;outline-offset:3px}
@media(min-width:1500px){main{padding-top:40px}.card-pad{padding:30px}.question{font-size:25px}}
@media(max-width:1180px) and (min-width:901px){.sidebar{width:222px}.workspace{margin-left:222px}main{padding:26px}.topbar{padding:18px 26px}.study-layout{grid-template-columns:minmax(0,1fr) 230px;gap:18px}.card-pad{padding:22px}.options{grid-template-columns:1fr}.modes button{padding:10px 15px}.brand strong{font-size:18px}}
@media(max-width:900px){.sidebar{position:static;width:auto;padding:18px 22px 16px;background:#12254b}.workspace{margin:0}.brand strong{font-size:22px}.brand small{font-size:14px}.brand-icon{width:43px;height:43px}#subjects{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));overflow:visible;gap:7px;margin-top:18px}.subject{flex-direction:column;padding:9px 5px;gap:5px;border:1px solid #34486d;min-height:77px;justify-content:center}.subject .subject-name{font-size:14px}.subject .subject-icon{width:29px;height:29px;font-size:18px}.subject.active{border-color:white}.subject:hover:not(.active){background:#243b64}.topbar{padding:13px 22px}main{padding:24px 22px}.study-layout{grid-template-columns:minmax(0,1fr) 225px;gap:18px}.card-pad{padding:22px}.options{grid-template-columns:1fr}.heading h1{font-size:30px}.modes button{font-size:16px}.chapter-count{padding:10px 14px}}
@media(max-width:680px){.sidebar{padding:16px}.brand strong{font-size:21px}.brand small{font-size:13px}#subjects{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:15px}.subject{flex-direction:row;justify-content:flex-start;padding:9px 10px;gap:8px;min-height:48px}.subject .subject-icon{width:27px;height:29px;font-size:17px}.subject .subject-name{font-size:14px}.topbar{padding:11px 16px}.session{font-size:14px}main{padding:21px 16px}.heading{gap:10px;margin-bottom:20px}.heading h1{font-size:27px;line-height:1.5}.eyebrow{font-size:14px}.heading p:last-child{font-size:16px}.chapter-count{padding:10px;min-width:72px}.chapter-count strong{font-size:26px}.chapter-count span{font-size:12px}.modes{display:grid;grid-template-columns:1.25fr 1fr 1fr;width:100%;padding:4px;gap:3px;overflow:visible}.modes button{font-size:14px;padding:10px 5px;white-space:normal;line-height:1.6}.study-layout{display:flex;gap:18px}.card{border-radius:15px}.lesson-top{padding:17px 16px;gap:12px}.counter{padding-top:23px}.counter b{font-size:20px}.counter span{font-size:12px;white-space:nowrap}.field select{font-size:16px;padding:9px;min-height:46px}.card-pad{padding:20px 16px}.question{font-size:21px;margin:15px 0 19px}.option{font-size:17px;min-height:60px;padding:13px}.option.selected{padding:12px}.concept{padding:14px 15px;margin-bottom:21px}.concept p{font-size:16px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.actions>.primary{grid-column:1/-1}.primary,.secondary{font-size:16px;padding:11px 13px}.lesson-footer{padding:15px 16px;gap:12px}.lesson-footer button{flex:1}.aside-stack{display:grid;grid-template-columns:1fr;width:100%}.progress-card{padding:21px}.progress-card h2{margin-bottom:13px}.mini-stats{gap:14px}.daily,.mini-card{display:none}.start-test{padding:28px 18px}.test-details{gap:8px}.test-details strong{font-size:21px}.test-details span{font-size:14px}.test-top .secondary{font-size:14px;padding:8px 10px}.test-top+.question{font-size:20px}footer{font-size:14px;margin-top:22px}.sources-intro{padding:17px}.paper-year{padding:20px}.paper-links{gap:8px}.paper-links a{font-size:15px}.resources a{width:100%;font-size:15px}.notebook textarea{font-size:16px}}
@media(max-width:360px){.subject{padding:8px 6px;gap:5px}.subject .subject-name{font-size:14px}.subject .subject-icon{width:23px}.heading h1{font-size:24px}.chapter-count{min-width:62px;padding:8px}.modes button{font-size:14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{.chapter-track{display:none}.card{box-shadow:none}.lesson-top{background:#fff}.chapter-count{background:#fff}}

/* Colourful student profile and clear answer states */
body{background:linear-gradient(135deg,#eef4ff 0%,#f6f2ff 55%,#f0fbf8 100%)}
.sidebar{background:linear-gradient(165deg,#142951,#263984 65%,#40388b)}
.subject{border:1px solid #ffffff18}.subject.active{box-shadow:0 4px 14px #080d3026}
.subject[data-subject="science"] .subject-icon{background:#d9f8ee}.subject[data-subject="social"] .subject-icon{background:#fff0cf}.subject[data-subject="hindi"] .subject-icon{background:#ffe3ec}.subject[data-subject="english"] .subject-icon{background:#eee5ff}.subject[data-subject="sanskrit"] .subject-icon{background:#ffedcf}
.student-profile{background:linear-gradient(115deg,#fff 15%,#eaf1ff 68%,#e4faf2);border:1px solid #d5e3f5;border-top:4px solid #5367dd;border-radius:18px;padding:20px 23px;margin-bottom:25px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;box-shadow:0 8px 24px #283f7710}
.profile-person{display:flex;align-items:center;gap:14px;flex:1;min-width:220px}.student-avatar{width:62px;height:62px;flex-shrink:0;display:grid;place-items:center;border-radius:20px;background:linear-gradient(140deg,#3155d9,#7c47cb);color:white;font-weight:750;font-size:30px;box-shadow:0 5px 13px #4f56c92b}.profile-kicker{color:#465781;font-size:14px;font-weight:600}.profile-person h2{font-size:23px;margin:0;color:#172648;overflow-wrap:anywhere}.profile-person small{color:#53617a;font-size:14px}.profile-stats{display:flex;gap:20px}.profile-stats div{text-align:center}.profile-stats strong{font-size:23px;display:block;line-height:1.5;color:#3155d9}.profile-stats div:nth-child(2) strong{color:#117842}.profile-stats div:nth-child(3) strong{color:#7541af}.profile-stats span{font-size:14px;color:#53617a;display:block}.profile-edit{border:1px solid #b8c9ed;background:#fff;color:#3155d9;padding:9px 12px;border-radius:10px;font-weight:600;font-size:14px;min-height:44px}.profile-form{width:100%;border-top:1px solid #d4dfed;padding-top:15px}.profile-form label{display:block;font-weight:600;font-size:14px;margin-bottom:6px}.profile-form>div{display:flex;gap:8px;flex-wrap:wrap}.profile-form input{min-width:0;flex:1;border:1px solid #b8c9ed;border-radius:10px;padding:10px 12px;font-size:16px;background:#fff;color:#172648}.profile-form small{display:block;color:#53617a;font-size:14px;margin-top:8px}.profile-form input:focus-visible{outline:3px solid #e6a619;outline-offset:3px}
.concept{background:linear-gradient(110deg,#eaf0ff,#f2ecff)}.chapter-count{background:linear-gradient(135deg,#e5edff,#eee3ff)}.daily{background:linear-gradient(135deg,#3155d9,#7541af)}.primary{background:linear-gradient(110deg,#3155d9,#6050d7)}.hint{background:#fff6cf;border-color:#e9ce6d}
.option.correct,.option.correct:disabled{background:#dcfce7;border:2px solid #15803d;color:#14532d;box-shadow:0 0 0 2px #16a34a12;padding:13px 15px}.option.wrong,.option.wrong:disabled{background:#fee2e2;border:2px solid #dc2626;color:#991b1b;box-shadow:0 0 0 2px #dc262612;padding:13px 15px}.option.correct .option-letter{background:#15803d;color:#fff}.option.wrong .option-letter{background:#dc2626;color:#fff}.option-text{flex:1;overflow-wrap:anywhere}.answer-mark{margin-left:auto;flex-shrink:0;font-size:22px;font-weight:bold}.feedback.good{background:#dcfce7;border:2px solid #16a34a;color:#14532d}.feedback.bad{background:#fee2e2;border:2px solid #dc2626;color:#991b1b}.feedback strong{font-size:18px}.feedback p{color:inherit}.review-item{border:1px solid var(--line);border-left-width:5px;border-radius:12px;padding:18px;margin-top:16px}.review-correct{background:#f0fdf4;border-color:#86d4a3;border-left-color:#15803d}.review-wrong{background:#fff1f2;border-color:#f6a9b0;border-left-color:#dc2626}.review-correct .badge{color:#14532d;background:#dcfce7}.review-wrong .badge{color:#991b1b;background:#fee2e2}
@media(max-width:680px){.student-profile{padding:16px;gap:14px;margin-bottom:20px}.profile-person{min-width:0;width:100%;flex:auto}.student-avatar{width:52px;height:52px;font-size:27px;border-radius:16px}.profile-person h2{font-size:21px}.profile-stats{order:3;width:100%;justify-content:space-between;border-top:1px solid #d4dfed;padding-top:12px;gap:8px}.profile-stats span{font-size:14px}.profile-edit{margin-left:66px}.profile-form{order:4}.profile-form input{flex-basis:100%;width:100%}.profile-form button{flex:1}.option.correct,.option.wrong{padding:12px}.student-profile small{line-height:1.6}}
@media print{.student-profile{display:none}body{background:#fff}.option.correct,.option.wrong{box-shadow:none}}