@font-face{font-family:Tamil;src:url(fonts/tamil-regular.woff2) format('woff2');font-weight:400 500;font-display:swap}@font-face{font-family:Tamil;src:url(fonts/tamil-bold.woff2) format('woff2');font-weight:600 900;font-display:swap}@font-face{font-family:UI;src:url(fonts/ui.woff2) format('woff2');font-weight:100 900;font-display:swap}@font-face{font-family:Editorial;src:url(fonts/editorial.woff2) format('woff2');font-weight:400 700;font-display:swap}
:root{--ink:#0B1A3A;--blue:#0B1A3A;--paper:#f7f8fa;--line:#e2e5ec;--muted:#5c687b;--teal:#0B1A3A;--amber:#765300;--indigo:#0B1A3A;--coral:#765300}*{box-sizing:border-box}html{scroll-padding-top:25px}body{margin:0;background:#fff;color:var(--ink);font-family:UI,Tamil,sans-serif;font-size:14px;line-height:1.7}html[data-mode=ta] body{font-family:Tamil,UI,sans-serif}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #846317;outline-offset:4px}a,button,input{ -webkit-tap-highlight-color:transparent}button{border:1px solid var(--line);border-radius:6px;background:white}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin:0}h1{font-family:Editorial,Tamil,serif;font-weight:400;font-size:40px;line-height:1.35;letter-spacing:-1.1px}h2{font-family:Editorial,Tamil,serif;font-weight:400;font-size:27px;line-height:1.45;letter-spacing:-.5px}h3{font-size:16px;line-height:1.6}[lang=ta]{font-family:Tamil,UI,sans-serif;line-height:1.85;letter-spacing:0}h1>[lang=ta]{font-size:.78em;font-weight:700}h2>[lang=ta]{font-size:.85em;font-weight:600}.secondary{display:block;color:var(--muted);font-family:UI,Tamil,sans-serif;font-size:.67em;font-weight:400;letter-spacing:0;margin-top:3px;line-height:1.65}.hero h1 .secondary{font-family:Editorial,serif;font-size:.61em;color:var(--ink);line-height:1.45;margin-top:12px}.wrap{max-width:1192px;width:calc(100% - 80px);margin:auto}.muted{color:var(--muted)}.small{font-size:12px}.tiny{font-size:10px}.eyebrow{text-transform:uppercase;letter-spacing:1.5px;font-size:10px;font-weight:700;color:var(--teal);margin-bottom:10px}.eyebrow [lang=ta]{letter-spacing:.3px}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--teal);margin-right:7px}.skip{position:absolute;top:-80px;left:20px;background:white;padding:10px;z-index:20}.skip:focus{top:10px}.site-header{border-bottom:1px solid var(--line);background:white}.nav{max-width:1392px;min-height:91px;margin:auto;padding:15px 24px;display:flex;align-items:center;gap:24px}.brand{display:flex;gap:10px;align-items:center;color:var(--ink);flex-shrink:0}.brand img{width:43px;height:43px;border-radius:10px}.brand strong{font-family:UI,sans-serif;display:block;font-size:18px;line-height:1.3;letter-spacing:-.5px;white-space:nowrap}.brand small{font-size:9px;color:var(--muted)}.navlinks{display:flex;align-items:center;gap:21px;font-size:11px;font-weight:600;flex-shrink:0}.navlinks a{color:var(--ink)}.navlinks a.active{color:var(--blue)}.search-box{flex:1;min-width:135px;position:relative}.search-box input{width:100%;border:1px solid var(--line);border-radius:6px;background:var(--paper);padding:10px 10px 10px 31px;font-size:11px;line-height:1.7;color:var(--ink)}.search-icon{position:absolute;top:6px;left:10px;font-size:21px;color:var(--muted)}.language{padding:3px;display:flex;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:7px;flex-shrink:0;gap:2px}.language button{border:none;background:transparent;font-size:10px;line-height:1.7;padding:6px 8px;min-height:29px;white-space:nowrap}.language button.active{background:white;box-shadow:0 1px 3px #0B1A3A1a;color:var(--blue);font-weight:700}.youtube-nav{font-size:11px;font-weight:700;line-height:1.5;white-space:nowrap}.youtube-nav small{font-size:9px;color:var(--muted);font-weight:400}.search-results{max-width:1192px;width:calc(100% - 80px);margin:18px auto;border:1px solid var(--line);border-radius:8px;padding:20px;background:var(--paper)}.search-results h2{font-size:18px;margin-bottom:12px}.search-results a{display:block;padding:8px 0;border-top:1px solid var(--line);font-size:12px}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:85px;align-items:center;padding:54px 0 42px}.hero-desc{max-width:510px;margin-top:19px;font-size:13px;line-height:1.9;color:var(--muted)}.hero-actions{display:flex;gap:20px;align-items:center;margin-top:24px;flex-wrap:wrap}.btn{display:inline-flex;justify-content:center;align-items:center;gap:12px;border:1px solid var(--line);border-radius:6px;background:white;color:var(--ink);padding:11px 17px;font-size:12px;font-weight:600;line-height:1.75;min-height:42px;text-align:center}.btn:hover{border-color:#846317;text-decoration:none}.btn.primary{color:white;background:var(--blue);border-color:var(--blue)}.btn.primary:hover{background:#152C58}.textlink{font-size:12px;font-weight:600}.pills{display:flex;flex-wrap:wrap;gap:7px;margin-top:22px}.pill{font-size:10px;border:1px solid var(--line);border-radius:22px;padding:4px 10px;color:var(--muted)}.goal-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 4px 0 var(--paper)}.goal-head{padding:20px 23px 15px;border-bottom:1px solid var(--line)}.goal-head .eyebrow{color:var(--muted);font-size:9px;margin-bottom:4px}.goal-head h3{font-size:16px}.track{display:flex;gap:12px;align-items:center;padding:12px 22px;border-bottom:1px solid var(--line);color:var(--ink);min-height:61px}.track:last-child{border-bottom:0}.track:hover{background:#FFF9E8;text-decoration:none}.track-icon{width:32px;height:32px;border-radius:6px;color:var(--blue);background:#FFF4D5;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}.track-text{flex:1;min-width:0}.track strong{display:block;font-size:11px;font-weight:600}.track small{display:block;font-size:10px;color:var(--muted);line-height:1.5;margin-top:2px}.arrow{font-size:19px;color:#8692a4}.principles{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;display:flex;gap:20px;justify-content:space-between;font-size:11px}.principles b{color:var(--teal);margin-right:7px}.section{padding:39px 0}.section-head{display:flex;justify-content:space-between;gap:25px;align-items:flex-end;margin-bottom:22px}.section-head>div:first-child{flex:1}.section-head p{font-size:12px;color:var(--muted);margin-top:6px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 24px}.subject{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:white}.subject-head{display:flex;gap:13px;align-items:center;padding:18px 20px 14px}.subject-icon{width:39px;height:39px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--accent);background:var(--tint,#f2f6f7);font-size:23px;flex-shrink:0}.subject-head h3{font-size:14px}.subject-head p{font-size:10px;color:var(--muted);margin-top:2px}.unit-list{padding:0 20px 4px}.unit-link{border-top:1px solid #edf0f4;display:flex;align-items:center;gap:12px;padding:12px 0;color:var(--ink);font-size:11px;min-height:47px}.unit-link:hover{color:var(--blue)}.unit-link .num{color:#8a96a8;font-size:9px;flex-shrink:0}.unit-link .unit-name{flex:1}.unit-link .count{font-size:9px;color:var(--muted);white-space:nowrap}.subject-foot{background:var(--paper);padding:10px 20px;font-size:10px;display:flex;align-items:center;justify-content:space-between;gap:15px}.subject-foot .progress{flex:1;max-width:100px}.progress{height:4px;background:#e7ebf1;border-radius:5px;overflow:hidden}.progress span{display:block;background:var(--teal);height:100%}.paper-band{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:36px 0}.video-row{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}.lesson-card,.note-card{border:1px solid var(--line);border-radius:8px;padding:22px;background:white}.lesson-card{display:flex;gap:20px;align-items:center}.lesson-mark{width:84px;height:84px;border-radius:15px;background:var(--ink);display:flex;align-items:center;justify-content:center;flex-shrink:0}.lesson-mark img{width:70px;height:70px;border-radius:12px}.lesson-card h3,.note-card h3{font-size:15px;margin-bottom:8px}.lesson-card p,.note-card p{font-size:11px;color:var(--muted);margin-bottom:15px}.lesson-links{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.lesson-links .btn{font-size:10px;padding:8px 12px}.closing{display:flex;justify-content:space-between;align-items:center;padding:34px 0;gap:25px}.closing h2{font-size:24px}.closing p{font-size:11px;color:var(--muted);margin-top:5px}.site-footer{border-top:1px solid var(--line);font-size:10px;color:var(--muted);padding:25px 0}.footer-inner{display:flex;justify-content:space-between;gap:30px}.footer-links{display:flex;gap:17px;flex-wrap:wrap}.footer-note{margin-top:13px;font-size:10px;max-width:900px}.breadcrumb{font-size:10px;color:var(--muted);padding-top:24px;display:flex;flex-wrap:wrap;gap:8px}.page-heading{padding:25px 0 28px;max-width:900px}.page-heading h1{font-size:37px}.page-heading p{margin-top:13px;color:var(--muted);font-size:13px;line-height:1.95;max-width:800px}.content-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,.8fr);gap:34px;align-items:start;padding-bottom:45px}.panel{border:1px solid var(--line);border-radius:8px;background:white;padding:25px}.panel+.panel{margin-top:20px}.panel h2{font-size:23px;margin-bottom:18px}.panel p,.panel li{font-size:12px;line-height:1.95}.panel ul{padding-left:21px;margin:0}.panel li+li{margin-top:12px}.notice{padding:15px 18px;background:var(--paper);border:1px solid var(--line);border-radius:6px;font-size:11px;color:var(--muted);margin:20px 0}.source-link{font-size:11px;display:inline-block;margin-top:17px}.exam-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding-bottom:40px}.exam-card{border:1px solid var(--line);border-radius:8px;padding:24px;display:block;color:var(--ink)}.exam-card:hover{background:var(--paper);text-decoration:none;border-color:#bbcce9}.exam-card h2{font-family:UI,Tamil,sans-serif;font-size:17px;font-weight:600}.exam-card p{margin:12px 0 19px;font-size:12px;color:var(--muted)}.mapped-link{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding:11px 0;font-size:11px}.mapped-link .subject-icon{width:28px;height:28px;font-size:17px}.ref-filters{display:flex;gap:8px;margin:0 0 20px;flex-wrap:wrap}.ref-filters button{font-size:11px;padding:7px 14px}.ref-filters button.active{background:var(--ink);color:white;border-color:var(--ink)}.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:8px;margin-bottom:24px}table{width:100%;border-collapse:collapse;text-align:left;font-size:11px}th,td{padding:15px 20px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--paper);font-size:10px;color:var(--muted);font-weight:600}tr:last-child td{border-bottom:none}.badge{display:inline-block;border-radius:4px;background:#edf8f5;color:#087667;padding:2px 6px;font-size:9px}.badge.tentative{background:#fff7ed;color:#a65608}.reference-title{font-size:12px;font-weight:600}.quiz-layout{max-width:940px;margin:0 auto;padding:25px 0 45px}.quiz-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:11px;color:var(--muted);margin-bottom:12px}.quiz-progress{height:5px;background:#e7ebf1;border-radius:6px;overflow:hidden;margin-bottom:24px}.quiz-progress span{display:block;background:var(--blue);height:100%}.question-card{border:1px solid var(--line);border-radius:10px;padding:32px}.question-card h2{font-family:UI,Tamil,sans-serif;font-size:19px;font-weight:600;line-height:1.9;margin:12px 0 23px;letter-spacing:0}.question-card h2 .secondary{font-size:14px}.question-meta{font-size:10px;color:var(--muted);display:flex;gap:15px;flex-wrap:wrap}.options{display:grid;gap:10px}.option{display:flex;gap:13px;align-items:center;min-height:54px;padding:13px 16px;width:100%;text-align:left;font-size:13px;line-height:1.8}.option:hover:not(:disabled){border-color:#846317;background:#FFF9E8}.option .letter{border:1px solid var(--line);width:27px;height:27px;border-radius:5px;display:flex;align-items:center;justify-content:center;font-family:UI,sans-serif;font-size:11px;flex-shrink:0}.option.correct{border-color:var(--teal);background:#effaf6}.option.wrong{border-color:var(--coral);background:#FFF4D5}.option:disabled{cursor:default;color:var(--ink);opacity:1}.feedback{margin-top:20px;border:1px solid #b8dfd3;border-radius:7px;background:#f0faf6;padding:19px}.feedback.incorrect{background:#fff9f2;border-color:#f3d6ae}.feedback h3{font-size:14px;margin-bottom:7px}.feedback p{font-size:12px;line-height:2}.feedback .explanation-label{font-size:10px;color:var(--muted);margin-top:9px}.quiz-actions{display:flex;justify-content:space-between;gap:15px;margin-top:22px;flex-wrap:wrap;align-items:center}.quiz-sources{font-size:10px;color:var(--muted);margin-top:18px;display:flex;gap:15px;flex-wrap:wrap}.quiz-sources a{font-size:10px}.quiz-aside{font-size:11px;color:var(--muted);margin-top:16px}.result{text-align:center;padding:38px 28px}.result-score{font-family:Editorial,serif;font-size:58px;line-height:1.3;margin:20px 0;color:var(--teal)}.result .btn{margin:15px 5px 0}.stats{display:flex;gap:20px;flex-wrap:wrap;margin-top:18px}.stat{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:10px 15px;font-size:11px}.stat strong{font-family:UI,sans-serif;margin-right:6px}.unit-intro{border-left:3px solid var(--blue);background:var(--paper);padding:16px 20px;margin-bottom:23px;font-size:12px;line-height:1.95}.practice-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.privacy-copy{max-width:850px;padding-bottom:50px}.privacy-copy h2{font-size:23px;margin:23px 0 10px}.privacy-copy p{font-size:13px;line-height:2}.empty{padding:25px;font-size:12px;color:var(--muted)}[hidden]{display:none!important}summary{cursor:pointer}details summary{font-size:12px;color:var(--blue)}details p{margin-top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1200px){.nav{gap:16px}.youtube-nav{display:none}.navlinks{gap:15px}.hero{gap:45px}.wrap{width:calc(100% - 64px)}h1{font-size:36px}.brand strong{font-size:17px}.brand img{width:39px;height:39px}}
@media(max-width:850px){.nav{flex-wrap:wrap;gap:13px 20px}.search-box{order:3;flex-basis:100%}.navlinks{margin-left:auto}.language{margin-left:auto}.hero{gap:30px;grid-template-columns:1fr 1fr}.hero h1{font-size:32px}.hero-desc{font-size:12px}.track{padding:11px 16px}.track strong{font-size:10px}.principles{flex-wrap:wrap;justify-content:flex-start;gap:8px 22px}.content-layout{grid-template-columns:1fr}.lesson-card{display:block}.lesson-mark{margin-bottom:15px}.footer-inner{display:block}.footer-links{margin-top:13px}}
@media(max-width:600px){.wrap{width:calc(100% - 36px)}.nav{padding:15px 18px 12px;gap:12px;justify-content:space-between;min-height:0}.brand{gap:7px}.brand img{width:34px;height:34px;border-radius:8px}.brand strong{font-size:15px}.brand small{font-size:8px}.navlinks{order:4;width:100%;justify-content:space-between;margin:0;border-top:1px solid var(--line);padding-top:10px;font-size:10px}.language{margin:0;padding:2px;gap:0}.language button{font-size:9px;padding:5px 6px;min-height:27px}.search-box{flex-basis:100%;order:3}.search-box input{padding:8px 11px 8px 32px;font-size:10px}.search-icon{top:4px}.search-results{width:calc(100% - 36px);padding:16px}.hero{display:block;padding:29px 0 26px}.hero h1{font-size:34px;line-height:1.5}.hero h1>[lang=ta]{font-size:25px;line-height:1.75}.hero h1 .secondary{font-size:21px;line-height:1.5}.eyebrow{font-size:9px;letter-spacing:1.1px}.hero-desc{font-size:12px;margin-top:15px;line-height:1.95}.hero-actions{gap:13px;margin-top:19px}.hero-actions .btn{font-size:11px;padding:10px 13px}.textlink{font-size:11px}.pills{margin-top:18px;gap:6px}.pill{font-size:9px;padding:3px 8px}.goal-card{margin-top:28px}.goal-head{padding:17px 18px 13px}.goal-head h3{font-size:15px}.track{padding:12px 18px;min-height:66px}.track strong{font-size:11px}.track small{font-size:9px}.principles{font-size:10px;padding:14px 0;gap:9px 17px}.principles>span:last-child{display:none}.section{padding:29px 0}.section-head{gap:12px;align-items:flex-start}.section-head h2{font-size:25px}.section-head p{font-size:11px}.section-head>.textlink{display:none}.grid,.video-row,.exam-grid{grid-template-columns:1fr;gap:16px}.subject-head{padding:17px 16px 14px}.subject-head h3{font-size:13px}.subject-head p{font-size:10px}.subject-icon{width:34px;height:34px;font-size:21px}.unit-list{padding:0 16px 4px}.unit-link{font-size:11px;padding:12px 0;gap:8px}.subject-foot{padding:10px 16px;font-size:9px}.lesson-card{display:flex;padding:20px;gap:14px;align-items:flex-start}.lesson-mark{width:52px;height:52px;margin:0;flex-shrink:0}.lesson-mark img{width:44px;height:44px}.lesson-card h3{font-size:13px}.lesson-card p{font-size:10px}.lesson-links{gap:11px}.lesson-links .btn{font-size:10px;min-height:38px}.note-card{padding:20px}.paper-band{padding:27px 0}.closing{display:block;padding:28px 0}.closing h2{font-size:24px}.closing .btn{margin-top:16px}.site-footer{padding:22px 0}.footer-note{font-size:9px}.breadcrumb{padding-top:20px;font-size:9px}.page-heading{padding:22px 0 24px}.page-heading h1{font-size:31px}.page-heading p{font-size:12px;line-height:2}.content-layout{gap:20px;padding-bottom:30px}.panel{padding:20px}.panel h2{font-size:23px}.panel p,.panel li{font-size:11px}.notice{padding:13px;font-size:10px}.exam-card{padding:20px}.exam-card h2{font-size:16px}.exam-card p{font-size:11px}.table-scroll{margin-bottom:20px}th,td{padding:13px 12px}table{min-width:530px}.ref-filters button{font-size:10px;padding:6px 10px}.quiz-layout{padding:22px 0 30px}.quiz-toolbar{font-size:10px}.question-card{padding:21px 17px}.question-card h2{font-size:16px;line-height:2;margin:13px 0 20px}.question-card h2 .secondary{font-size:12px}.question-meta{font-size:9px;gap:9px}.option{font-size:12px;gap:10px;padding:12px;line-height:1.95}.option .letter{width:25px;height:25px}.feedback{padding:15px}.feedback p{font-size:11px}.quiz-actions .btn{font-size:10px;padding:10px 12px}.quiz-sources{gap:10px}.quiz-aside{font-size:10px}.unit-intro{font-size:11px;padding:14px 16px}.result-score{font-size:47px}.stats{gap:10px}.stat{font-size:10px;padding:8px 10px}.privacy-copy p{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.site-header,.site-footer,.search-results,.quiz-actions{display:none}.wrap{width:100%}.hero{padding-top:20px}.option{break-inside:avoid}.panel,.subject{break-inside:avoid}a{color:var(--ink)}}

/* Expanded questions and Tamil-first video library */
.subscribe-band{display:flex;align-items:center;justify-content:space-between;gap:24px;background:#edf3fa;padding:26px;border-radius:18px;margin-top:32px;margin-bottom:32px}.subscribe-band h2{font-size:1.2rem}.subscribe-band p{margin-top:8px}.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr));gap:18px;margin:20px 0}.video-card{overflow:hidden;padding:18px;min-width:0}.video-card img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:10px}.video-card h3{font-size:1rem;margin:14px 0;overflow-wrap:anywhere}.video-filters{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.video-filters select{font:inherit;max-width:100%;padding:12px;border:1px solid #bdc8d7;border-radius:8px;background:#fff;color:#142643}.practice-badge{background:#fff1d6;color:#704600}.related-videos{margin-top:28px;margin-bottom:28px}.stat .secondary{font-size:.75rem}.video-empty{margin-top:18px}.navlinks{flex-wrap:wrap}@media(max-width:700px){.subscribe-band{flex-direction:column;align-items:flex-start;margin:20px 14px}.video-filters{align-items:flex-start;flex-direction:column}.question-meta{flex-wrap:wrap;gap:10px}.video-card h3{line-height:1.7}}

/* 2026-11: persistent YouTube rail inside content, never over the header. */
.site-content-shell{display:grid;grid-template-columns:minmax(0,1fr) 306px;column-gap:24px;align-items:start;max-width:1592px;width:calc(100% - 48px);margin:0 auto;padding-top:24px}.page-content{grid-column:1;grid-row:1;min-width:0}.page-content>.wrap{width:calc(100% - 32px)}.page-content .hero{gap:30px;padding-top:26px}.page-content .hero h1{font-size:34px}.page-content .hero-desc{font-size:12px}.page-content .hero .track{padding:11px 14px}.yt-top-card.subscribe-band{grid-column:2;grid-row:1;position:sticky;top:20px;z-index:1;display:block;align-self:start;width:100%;margin:0 0 24px;padding:18px;background:#fff;border:1px solid #846317;border-top:4px solid #FFC531;border-radius:14px;box-shadow:0 6px 22px #152a4510}.yt-card-heading{display:flex;gap:12px;align-items:center}.youtube-play-logo{flex:0 0 64px;width:64px;height:46px;display:block}.yt-channel{font-family:UI,Tamil,sans-serif;font-size:10px;font-weight:700;letter-spacing:.1px;color:#0B1A3A}.yt-top-card h2{font-family:UI,Tamil,sans-serif;font-size:14px;font-weight:700;line-height:1.6;letter-spacing:0;margin-top:3px}.yt-top-card h2>[lang=ta]{font-size:1em}.yt-top-card p{font-size:11px;color:var(--muted);line-height:1.9;margin:13px 0}.yt-card-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.yt-card-actions .btn{font-size:10px;padding:9px 12px;background:#0B1A3A;border-color:#0B1A3A}.yt-card-actions .btn:hover{background:#152C58;border-color:#152C58}.yt-card-actions .textlink{font-size:11px}.yt-card-foot{border-top:1px solid #E8D7AA;margin-top:15px;padding-top:12px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}.yt-card-foot .yt-subscribe{font-size:10px;padding:6px 9px;min-height:32px;border-color:#846317;color:#0B1A3A}.yt-card-foot>.textlink{font-size:10px}.yt-top-card .secondary{font-size:.83em}.page-content .video-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr))}
@media(max-width:1100px){.site-content-shell{display:flex;flex-direction:column;gap:0;width:100%;padding-top:16px}.yt-top-card.subscribe-band{position:static;width:calc(100% - 48px);margin:0 auto 12px;padding:14px 18px;border-top-width:3px}.page-content{width:100%}.page-content>.wrap{width:calc(100% - 64px)}.yt-card-heading{gap:12px}.yt-top-card h2{font-size:15px}.yt-top-card p{margin:8px 0;font-size:11px}.yt-card-foot{margin-top:10px;padding-top:8px}.page-content .hero h1{font-size:36px}}
@media(max-width:600px){.site-content-shell{padding-top:12px}.yt-top-card.subscribe-band{width:calc(100% - 28px);margin:0 auto 8px;padding:12px;border-radius:10px}.youtube-play-logo{flex-basis:54px;width:54px;height:39px}.yt-top-card h2{font-size:13px;line-height:1.65}.yt-channel{font-size:9px}.yt-card-heading{gap:10px}.yt-top-card p{font-size:10px;line-height:1.8;margin:8px 0 10px}.yt-card-actions{gap:14px}.yt-card-actions .btn{font-size:10px;padding:8px 10px;min-height:36px}.yt-card-foot{display:flex;gap:14px;padding-top:8px;margin-top:9px}.yt-card-foot .yt-subscribe{font-size:9px;min-height:28px;padding:4px 7px}.yt-card-foot>.textlink{font-size:9px}.page-content>.wrap{width:calc(100% - 36px)}.page-content .hero{padding-top:20px}.page-content .hero h1{font-size:34px}.page-content .hero .track{padding:12px 18px}}

.video-year-shortcuts{margin:0 0 18px}.video-year-group{margin-top:28px}.video-year-group>h2{font-size:23px}.video-filters>div>label{display:block;margin-bottom:6px;font-size:11px;font-weight:600}.video-filters{align-items:flex-end;margin-bottom:18px}.video-filters .ref-filters{margin-bottom:0}.video-filters select{min-height:44px}@media(max-width:600px){.video-filters>div,.video-filters select{width:100%}.video-filters{width:100%;gap:12px}.video-year-group>h2{font-size:21px}}

/* Visible format/exam/year/type pills; no catalogue dropdowns. */
.video-pill-filters{display:block;padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}.video-filter-group{border:0;padding:0;margin:0 0 15px;min-width:0}.video-filter-group:last-child{margin-bottom:0}.video-filter-group legend{padding:0;margin:0 0 8px;font-size:11px;font-weight:700;color:var(--ink)}.video-filter-group .ref-filters{margin:0;gap:8px}.video-filter-group button{background:#fff;border-radius:999px;min-height:36px;max-width:100%;white-space:normal;line-height:1.65}.video-filter-group button.active{background:var(--ink);color:#fff}.video-grid{align-items:start}.video-card-short img{aspect-ratio:9/16;object-fit:cover}.format-badge{background:#edf1fa;color:#31446d}.video-card p .badge{margin-top:5px}@media(max-width:600px){.video-pill-filters{padding:13px}.video-filter-group .ref-filters{gap:7px}.video-filter-group button{font-size:10px;padding:7px 11px;min-height:36px}.video-filter-group legend{font-size:10px}.video-card-short img{aspect-ratio:9/16}}

/* Logo-sampled brand: navy #0B1A3A and gold #FFC531. Gold text only on navy. */
:root{--navy:#0B1A3A;--gold:#FFC531;--gold-dark:#765300;--ink:var(--navy);--blue:var(--navy);--muted:#4B5567;--paper:#FAF8F2;--line:#D9DDE5;--teal:var(--navy)}
a{text-underline-offset:3px}.textlink,.source-link,.quiz-sources a,.category-coverage a,.privacy-copy a{text-decoration:underline}
h1,h2,h3{color:var(--navy)}.site-header{background:var(--navy);border-bottom:3px solid var(--gold)}
.brand,.brand strong,.navlinks a{color:#FFF}.brand small,.youtube-nav,.youtube-nav small{color:var(--gold)}
.navlinks a.active,.navlinks a:hover{color:var(--gold);text-decoration:underline;text-underline-offset:5px}
.language{background:#152C58;border-color:#846317}.language button{color:#FFF}.language button.active{background:var(--gold);color:var(--navy);box-shadow:none}
.search-box input{background:#FFF;border-color:#FFF;color:var(--navy)}.search-box input::placeholder{color:var(--muted)}.search-icon{color:var(--muted)}
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--navy);outline-offset:4px}
.site-header a:focus-visible,.site-header button:focus-visible,.site-header input:focus-visible{outline-color:var(--gold)}
.btn,.pill,.ref-filters button{border-color:#846317;color:var(--navy)}.btn:hover{border-color:var(--navy);background:#FFF4D5}
.btn.primary,.yt-card-actions .btn{background:var(--navy);border-color:var(--navy);color:var(--gold)}
.btn.primary:hover,.yt-card-actions .btn:hover{background:#152C58;border-color:#152C58;color:var(--gold)}
.ref-filters button.active,.video-filter-group button.active{background:var(--navy);border-color:var(--navy);color:var(--gold)}
.track-icon,.subject-icon{background:#FFF4D5;color:var(--navy)}.subject-icon{--tint:#FFF4D5}.unit-link .num{color:#5D6675}.arrow{color:#5D6675}
.progress span,.quiz-progress span{background:var(--navy)}.goal-head,.subject-head{border-top:3px solid var(--gold)}
.yt-top-card.subscribe-band{border-color:#846317;border-top-color:var(--gold);background:#FFFDF7}.yt-channel{color:var(--navy)}
.yt-card-foot{border-top-color:#E8D7AA}.yt-card-foot .yt-subscribe{background:var(--gold);color:var(--navy);border-color:#846317}
.badge,.format-badge{background:#FFF4D5;color:var(--navy)}.practice-badge,.badge.tentative{background:#FFF4D5;color:#765300}
.option{border-color:#7C8697}.option .letter{border-color:#7C8697}.option.correct{background:#F0FAF6;border-color:#12624D}.option.wrong{background:#FFF4D5;border-color:#765300}
.feedback{border-color:#12624D}.feedback.incorrect{background:#FFF4D5;border-color:#765300}
.site-footer{background:var(--navy);color:#DFE5EF;border-top:3px solid var(--gold)}.site-footer a{color:var(--gold)}
.category-coverage{margin-top:0}.unit-list{max-height:none}.unit-link .unit-name{overflow-wrap:anywhere}
@media(max-width:600px){.navlinks{border-top-color:#596579}.navlinks{gap:9px}.navlinks a{font-size:10px}.unit-link .count{font-size:9px}.category-coverage{line-height:1.9}}

/* Bilingual secondary labels inherit accessible contrast on dark brand surfaces. */
.site-header .navlinks .secondary,.site-footer .secondary{color:#DFE5EF}.btn.primary .secondary,.yt-card-actions .btn .secondary,.ref-filters button.active .secondary{color:#FFF}.yt-card-foot .yt-subscribe .secondary{color:var(--navy)}

/* Enlarged header mark: native256px source, never upscaled. */
.nav{min-height:108px;gap:20px}.brand{gap:12px;min-width:0}.brand img{width:72px;height:72px;max-width:none;flex:0 0 72px;border-radius:15px;object-fit:contain}.brand strong{font-size:28px;line-height:1.25;letter-spacing:-.6px}.brand small{display:block;font-size:14px;line-height:1.6;margin-top:3px}.navlinks{flex-wrap:nowrap;gap:19px}.navlinks>a{white-space:nowrap}
@media(max-width:1250px){.nav{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"brand search language" "brand links links";gap:9px 20px;padding:15px 24px;min-height:104px}.brand{grid-area:brand}.brand img{width:64px;height:64px;flex-basis:64px;border-radius:13px}.brand strong{font-size:26px}.brand small{font-size:13px}.search-box{grid-area:search;min-width:0;order:initial}.language{grid-area:language;margin:0;order:initial}.navlinks{grid-area:links;width:auto;margin:0;padding:0;border:0;order:initial;justify-content:flex-start;gap:20px}.youtube-nav{display:none}}
@media(max-width:700px){.nav{grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand brand" "search language" "links links";gap:12px;padding:14px 18px;min-height:0}.brand{gap:10px;justify-self:start}.brand img{width:52px;height:52px;flex-basis:52px;border-radius:11px}.brand strong{font-size:23px;letter-spacing:-.4px}.brand small{font-size:12px;margin-top:2px}.language{justify-self:end}.language button{font-size:9px;padding:5px 6px}.search-box input{padding:8px 9px 8px 28px;font-size:10px}.search-icon{left:8px;top:4px}.navlinks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:100%;border-top:1px solid #596579;padding-top:10px;align-items:start}.navlinks>a{white-space:normal;text-align:center;overflow-wrap:anywhere;font-size:10px}}

/* Shared sticky desktop rail: YouTube first, private feedback directly below. */
.site-rail{grid-column:2;grid-row:1;position:sticky;top:20px;align-self:start;display:flex;flex-direction:column;gap:16px;min-width:0;max-height:calc(100vh - 40px);overflow:auto;padding-bottom:4px;scrollbar-width:thin}.site-rail .yt-top-card.subscribe-band{position:static;margin:0;width:100%;flex-shrink:0}.feedback-card.panel{margin:0;padding:18px;border:1px solid #846317;border-top:4px solid var(--gold);border-radius:14px;background:#FFFDF7;flex-shrink:0;position:relative}.feedback-card h2{font-family:UI,Tamil,sans-serif;font-size:15px;font-weight:700;letter-spacing:0;margin-bottom:12px}.feedback-card label{display:block;font-size:12px;font-weight:600;margin:10px 0 5px}.feedback-card textarea,.feedback-card input[type=email]{display:block;width:100%;max-width:100%;font:inherit;font-size:13px;padding:8px 9px;border:1px solid #7C8697;border-radius:6px;background:#FFF;color:var(--navy)}.feedback-card textarea{resize:vertical;min-height:76px}.feedback-type{gap:6px;margin:0}.feedback-type button{font-size:10px;padding:5px 8px;line-height:1.7;border-radius:999px}.feedback-card .feedback-privacy{font-size:10px;line-height:1.9;color:var(--muted);margin:9px 0}.feedback-submit{width:100%;font-size:11px}.feedback-honeypot{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.feedback-card #feedback-status{font-size:10px;margin-top:8px}.feedback-card .feedback-thanks p{font-size:12px;margin:10px 0}.exam-subject-group>.subject{margin-top:12px}.official-distribution{margin-top:6px;color:var(--muted)}.exam-profile-note p+p{margin-top:8px}.subjects-exam-filters{margin-bottom:18px}.subjects-exam-filters .video-filter-group{margin:0}
@media(max-width:1100px){.site-rail{position:static;max-height:none;overflow:visible;width:calc(100% - 48px);margin:0 auto 12px;padding:0;gap:12px}.site-rail .yt-top-card.subscribe-band{width:100%;margin:0}.feedback-card.panel{padding:14px 18px}}
@media(max-width:600px){.site-rail{width:calc(100% - 28px);margin-bottom:8px;gap:10px}.feedback-card.panel{padding:12px;border-radius:10px}.feedback-type button{font-size:10px}.feedback-card h2{font-size:14px}.feedback-card .feedback-privacy{font-size:10px}}

@media(max-width:600px){.feedback-card textarea,.feedback-card input[type=email]{font-size:16px}}

/* Compact latest-video YouTube card */
.yt-top-card.subscribe-band{padding:12px;border-top-color:var(--gold);margin-bottom:0}.yt-latest-thumbnail{display:block;position:relative;width:100%;height:130px;overflow:hidden;border-radius:8px;background:var(--navy);margin-bottom:9px}.yt-latest-thumbnail img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}.yt-thumbnail-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#0B1A3A16}.yt-thumbnail-play svg{filter:drop-shadow(0 2px 6px #0007)}.yt-latest-thumbnail:hover .yt-thumbnail-play{background:#0B1A3A05}.yt-latest-label{position:absolute;left:6px;top:6px;color:var(--gold);background:var(--navy);font-size:9px;font-weight:700;padding:3px 6px;border-radius:4px}.yt-card-heading{gap:9px}.yt-card-heading .youtube-play-logo{width:40px;height:29px;flex-basis:40px}.yt-top-card h2{font-size:12px;line-height:1.6;margin-top:1px}.yt-channel{font-size:9px}.yt-top-card p.yt-card-tagline{font-size:10px;line-height:1.5;margin:8px 0;white-space:nowrap;letter-spacing:-.12px}.yt-card-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;align-items:stretch}.yt-card-actions .btn{font-size:10px;padding:7px 6px;min-height:38px;line-height:1.65;text-align:center;justify-content:center}.yt-card-actions .yt-subscribe{background:var(--gold);border-color:var(--navy);color:var(--navy)}.yt-card-actions .yt-subscribe:hover{background:var(--navy);color:var(--gold)}.yt-card-foot{margin-top:8px;padding-top:7px;gap:13px}.yt-card-foot>.textlink{font-size:9px}.yt-top-card .secondary{font-size:.85em}@media(max-width:1100px){.site-rail .yt-top-card.subscribe-band{padding:12px}.yt-latest-thumbnail{height:140px}}@media(max-width:600px){.yt-latest-thumbnail{height:124px}.yt-top-card h2{font-size:12px}.yt-top-card p.yt-card-tagline{font-size:11px}.yt-card-actions .btn{font-size:11px;min-height:38px}.yt-card-foot>.textlink{font-size:10px}}

/* Official exam dates */
.exam-date-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.exam-date-card{margin:0;min-width:0}.exam-date-card h3{font-size:16px;line-height:1.6}.exam-date-card p{overflow-wrap:anywhere;font-size:13px;line-height:1.8;margin:9px 0}.exam-date-card strong{font-weight:700;color:var(--navy)}.date-status{padding:5px 8px;background:#FFF4CF;border-radius:5px}.goal-card{max-height:620px;overflow:auto}.exam-findings h3{font-size:15px;margin-top:18px}@media(max-width:700px){.exam-date-grid{grid-template-columns:1fr}.goal-card{max-height:none;overflow:visible}}