@import url(https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap);:root{color-scheme:light dark;--cbse-c:hsl(354, 85%, 58%);--cbse-b:hsl(38, 95%, 52%);--cbse-s:hsl(150, 75%, 40%);--cbse-e:hsl(215, 85%, 52%);--logo-c:#dc2626;--logo-b:#d97706;--logo-s:#059669;--logo-e:#2563eb;--logo-line:#cbd5e1;--logo-text:#1e3a8a;--logo-desc:#475569;--bg-header:#ffffff;--primary:hsl(225, 60%, 35%);--primary-light:hsl(225, 55%, 45%);--primary-transparent:hsla(225, 60%, 35%, 0.08);--accent:var(--cbse-s);--accent-light:hsl(150, 75%, 55%);--bg:hsl(220, 20%, 97%);--bg-card:hsl(0, 0%, 100%);--bg-card-hover:hsl(220, 20%, 94%);--border:hsl(220, 15%, 88%);--text-main:hsl(225, 40%, 12%);--text-muted:hsl(220, 12%, 46%);--shadow:0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 8px -1px rgba(0, 0, 0, 0.03);--shadow-hover:0 20px 40px -10px rgba(0, 0, 0, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.05);--font-heading:'Outfit', sans-serif;--font-body:'Plus Jakarta Sans', sans-serif;--radius:16px;--radius-sm:8px;--transition:all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);--transition-fast:all 0.15s ease-out}@media (prefers-color-scheme:dark){:root{--primary:hsl(225, 75%, 72%);--primary-light:hsl(225, 75%, 80%);--primary-transparent:hsla(225, 75%, 72%, 0.15);--accent:hsl(150, 75%, 60%);--accent-light:hsl(150, 75%, 72%);--bg:hsl(232, 25%, 10%);--logo-c:#e43f5a;--logo-b:#f59e0b;--logo-s:#10b981;--logo-e:#60a5fa;--logo-line:#2d3a55;--logo-text:#a5b4fc;--logo-desc:#475569;--bg-header:rgba(18, 19, 28, 0.8);--bg-card:hsl(232, 22%, 14%);--bg-card-hover:hsl(232, 22%, 18%);--border:hsl(232, 18%, 22%);--text-main:hsl(210, 20%, 98%);--text-muted:hsl(220, 12%, 70%);--shadow:0 4px 25px -4px rgba(0, 0, 0, 0.3), 0 2px 10px -2px rgba(0, 0, 0, 0.2);--shadow-hover:0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 8px 20px -4px rgba(0, 0, 0, 0.35)}}html[data-theme="dark"]{--primary:hsl(225, 75%, 72%);--primary-light:hsl(225, 75%, 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97%);--logo-c:#dc2626;--logo-b:#d97706;--logo-s:#059669;--logo-e:#2563eb;--logo-line:#cbd5e1;--logo-text:#1e3a8a;--logo-desc:#475569;--bg-header:#ffffff;--bg-card:hsl(0, 0%, 100%);--bg-card-hover:hsl(220, 20%, 94%);--border:hsl(220, 15%, 88%);--text-main:hsl(225, 40%, 12%);--text-muted:hsl(220, 12%, 46%);--shadow:0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 8px -1px rgba(0, 0, 0, 0.03);--shadow-hover:0 20px 40px -10px rgba(0, 0, 0, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.05)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text-main);font-family:var(--font-body);font-size:16px;line-height:1.6;overflow-x:hidden;transition:background-color 0.3s ease,color 0.3s ease}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.25;margin-bottom:.5em;color:var(--text-main)}a{color:var(--primary);text-decoration:none;transition:var(--transition-fast)}a:hover{color:var(--primary-light)}img{max-width:100%;height:auto;border-radius:var(--radius-sm)}.container{width:90%;max-width:1200px;margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;background:var(--bg-header);backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);border-bottom:1px solid var(--border);z-index:1000;padding:15px 0;transition:var(--transition)}.site-header .container{display:flex;justify-content:space-between;align-items:center;position:relative}.site-logo a{display:flex;align-items:center;gap:12px;text-decoration:none}.logo-icon-wrap{display:flex;align-items:center;flex-shrink:0}.site-logo-icon{height:38px;width:87px;display:block;flex-shrink:0}.site-logo-icon .logo-c{fill:var(--logo-c)!important}.site-logo-icon .logo-b{fill:var(--logo-b)!important}.site-logo-icon .logo-s{fill:var(--logo-s)!important}.site-logo-icon .logo-e{fill:var(--logo-e)!important}.site-logo-icon text,.site-logo-icon rect{transition:fill 0.3s ease}.logo-divider-line{width:1.5px;height:34px;background-color:var(--logo-line)!important;display:block;flex-shrink:0;transition:background-color 0.3s ease}.logo-text-wrap{display:flex;flex-direction:column;justify-content:center;flex-shrink:0}.logo-title{font-family:'Georgia',serif;font-size:1.2rem;font-weight:700;color:var(--logo-text)!important;line-height:1.25;transition:color 0.3s ease;white-space:nowrap}.logo-tagline{font-family:var(--font-body);font-size:.65rem;color:var(--logo-desc)!important;line-height:1.3;margin-top:2px;transition:color 0.3s ease;white-space:nowrap}.main-navigation{display:flex;align-items:center;gap:20px}.main-navigation ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:20px}.main-navigation li{position:relative}.main-navigation a{font-weight:600;font-size:.95rem;color:var(--text-main);display:inline-flex;align-items:center;padding:10px 0;transition:var(--transition-fast)}.main-navigation a:hover,.main-navigation .current-menu-item>a{color:var(--primary)}.main-navigation ul.sub-menu{display:flex;position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(15px);background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);min-width:260px;box-shadow:var(--shadow-hover);padding:10px 0;z-index:1000;margin:0;flex-direction:column;align-items:flex-start;gap:0;opacity:0;visibility:hidden;pointer-events:none;transition:opacity 0.25s cubic-bezier(.16,1,.3,1),transform 0.25s cubic-bezier(.16,1,.3,1),visibility 0.25s cubic-bezier(.16,1,.3,1)}.main-navigation ul.sub-menu li{width:100%}.main-navigation ul.sub-menu a{display:block;width:100%;padding:10px 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0;text-align:center;position:relative}.hero-title{font-size:3.5rem;font-weight:800;letter-spacing:-1.5px;margin-bottom:20px;color:var(--text-main)!important;background:linear-gradient(135deg,var(--text-main),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:#fff0}.hero-subtitle{font-size:1.2rem;color:var(--text-muted)!important;max-width:600px;margin:0 auto 40px auto}.search-wrapper{max-width:600px;margin:0 auto;position:relative;box-shadow:var(--shadow-hover);border-radius:var(--radius);overflow:hidden}.search-wrapper input{width:100%;padding:20px 25px;border:1px solid var(--border);background-color:var(--bg-card);color:var(--text-main);font-family:var(--font-body);font-size:1.1rem;outline:none;border-radius:var(--radius);transition:var(--transition)}.search-wrapper input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-transparent)}.search-wrapper button{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:var(--primary);border:none;color:#fff;padding:10px 20px;border-radius:calc(var(--radius) - 6px);font-family:var(--font-body);font-weight:600;cursor:pointer;transition:var(--transition)}.search-wrapper button:hover{background:var(--primary-light)}.directory-section{padding:50px 0}.directory-controls{display:flex;justify-content:center;gap:15px;margin-bottom:40px}.medium-btn{background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);padding:12px 30px;border-radius:30px;font-weight:700;cursor:pointer;transition:var(--transition);font-family:var(--font-heading);box-shadow:var(--shadow)}.medium-btn.active,.medium-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-hover)}.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}.class-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:35px 30px;transition:var(--transition);position:relative;overflow:hidden;box-shadow:var(--shadow)}.class-card::before{content:'';position:absolute;top:0;left:0;width:6px;height:100%;background:var(--primary)}.class-card:nth-child(4n+1)::before{background:var(--cbse-c)}.class-card:nth-child(4n+2)::before{background:var(--cbse-b)}.class-card:nth-child(4n+3)::before{background:var(--cbse-s)}.class-card:nth-child(4n+4)::before{background:var(--cbse-e)}.class-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.class-card:nth-child(4n+1):hover{border-color:var(--cbse-c)}.class-card:nth-child(4n+2):hover{border-color:var(--cbse-b)}.class-card:nth-child(4n+3):hover{border-color:var(--cbse-s)}.class-card:nth-child(4n+4):hover{border-color:var(--cbse-e)}.class-badge{padding:6px 12px;border-radius:20px;font-size:.75rem;font-weight:700;text-transform:uppercase;display:inline-block;margin-bottom:15px}.class-card:nth-child(4n+1) .class-badge{background:rgb(230 57 70 / .1);color:var(--cbse-c)}.class-card:nth-child(4n+2) .class-badge{background:rgb(255 170 0 / .15);color:var(--cbse-b)}.class-card:nth-child(4n+3) .class-badge{background:rgb(16 185 129 / .1);color:var(--cbse-s)}.class-card:nth-child(4n+4) .class-badge{background:rgb(42 117 211 / .1);color:var(--cbse-e)}html[data-theme="dark"] .class-card:nth-child(4n+1) .class-badge{background:rgb(230 57 70 / .2)}html[data-theme="dark"] .class-card:nth-child(4n+2) .class-badge{background:rgb(255 170 0 / .25)}html[data-theme="dark"] .class-card:nth-child(4n+3) .class-badge{background:rgb(16 185 129 / .2)}html[data-theme="dark"] .class-card:nth-child(4n+4) .class-badge{background:rgb(42 117 211 / .2)}.class-card-title{font-size:1.6rem;font-weight:800;margin-bottom:10px;color:var(--text-main)!important}.class-card-description{font-size:.9rem;color:var(--text-muted)!important;margin-bottom:25px}.subjects-list-links{display:flex;flex-direction:column;gap:12px}.subject-link-item{display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text-main)!important;border-bottom:1px solid var(--border);padding-bottom:8px;font-size:.95rem}.subject-link-item:hover{color:var(--primary)!important;padding-left:5px}.subject-link-item span{font-size:.75rem;color:var(--text-muted)!important;background:var(--bg)!important;padding:2px 8px;border-radius:4px}.notes-layout-wrapper{display:grid;grid-template-columns:280px 1fr;gap:40px;padding:40px 0;min-width:0}.notes-content-area,.notes-sidebar{min-width:0}.notes-sidebar{position:sticky;top:100px;align-self:start}.notes-nav-card{background:var(--bg-card);border:1px solid 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ul,.rich-text-content ol{padding-left:24px;margin-left:0;margin-bottom:1.5em}.rich-text-content ul{list-style-type:disc}.rich-text-content ol{list-style-type:decimal}.rich-text-content li{margin-bottom:8px;padding-left:4px;overflow-wrap:break-word;word-wrap:break-word;word-break:break-word}.rich-text-content ul ul,.rich-text-content ol ol,.rich-text-content ul ol,.rich-text-content ol ul{padding-left:20px;margin-left:0;margin-top:6px;margin-bottom:6px}.rich-text-content a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;font-weight:600;overflow-wrap:break-word;word-wrap:break-word;word-break:break-word}.rich-text-content a:hover{color:var(--primary-light);text-decoration-color:var(--primary-light)}.pdf-download-box{border:2px dashed var(--border);border-radius:var(--radius);padding:40px;text-align:center;background:var(--bg);margin:30px 0;transition:var(--transition)}.pdf-download-box:hover{border-color:var(--primary)}.pdf-icon{font-size:3rem;color:hsl(0 84% 60%);margin-bottom:15px}.pdf-title{font-weight:700;font-size:1.25rem;margin-bottom:10px}.pdf-btn{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#fff;padding:15px 35px;border-radius:30px;font-weight:700;cursor:pointer;box-shadow:var(--shadow);transition:var(--transition);border:none;font-family:var(--font-body)}.pdf-btn:hover{background:var(--accent-light);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}.quiz-widget-container{max-width:700px;margin:20px auto}.quiz-progress-bar-wrapper{height:6px;background:var(--border);border-radius:3px;overflow:hidden;margin-bottom:30px}.quiz-progress-bar-fill{height:100%;width:0%;background:linear-gradient(to right,var(--primary),var(--accent));transition:width 0.3s ease}.quiz-card{border:1px solid 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var(--cbse-s);color:var(--cbse-s)}.quiz-option-btn.incorrect{border-color:var(--cbse-c);background:rgb(230 57 70 / .1);box-shadow:0 0 0 2px var(--cbse-c);color:var(--cbse-c)}.quiz-control-bar{display:flex;justify-content:flex-end}.quiz-next-btn{background:var(--primary);color:#fff;border:none;padding:12px 30px;border-radius:var(--radius-sm);font-weight:600;cursor:pointer;font-family:var(--font-body);transition:var(--transition)}.quiz-next-btn:hover{background:var(--primary-light)}.quiz-score-screen{text-align:center;padding:40px 20px}.quiz-score-circle{width:150px;height:150px;border-radius:50%;border:8px solid var(--accent);display:flex;align-items:center;justify-content:center;font-size:2.5rem;font-weight:800;margin:0 auto 30px auto;font-family:var(--font-heading)}.site-footer{background:var(--bg-card);border-top:1px solid var(--border);padding:60px 0 30px 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.faq-answer{max-height:200px;padding-bottom:25px}.cbse-related-content-box{background:var(--bg-card);border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:var(--radius-sm);padding:18px 22px;margin:30px 0;box-shadow:var(--shadow);transition:var(--transition-fast)}.cbse-related-content-box:hover{box-shadow:var(--shadow-hover);border-left-color:var(--accent);transform:translateY(-1px)}.cbse-related-label{display:inline-flex;align-items:center;gap:6px;font-size:.75rem;font-weight:805;text-transform:uppercase;color:var(--accent);margin-bottom:8px;letter-spacing:.8px}.cbse-related-title{font-family:var(--font-heading);font-size:1.1rem;margin:0;line-height:1.4;font-weight:700}.cbse-related-title a{color:var(--text-main)!important;text-decoration:none!important;transition:var(--transition-fast)}.cbse-related-title a:hover{color:var(--primary)!important}@media (max-width:480px){.cbse-related-content-box{padding:14px 16px;margin:20px 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