@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&display=swap";.dropdown-menu{position:absolute;top:100%;left:0;min-width:200px;background:var(--color-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:.5rem 0;z-index:1000;border:1px solid var(--color-border-light);animation:dropdownFade .15s ease-out}@keyframes dropdownFade{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.dropdown-list{list-style:none;padding:0;margin:0}.dropdown-list li{margin:0}.dropdown-link{display:block;padding:.75rem 1.25rem;color:var(--color-text);text-decoration:none;font-size:.95rem;font-weight:600;transition:all var(--transition-fast)}.dropdown-link:hover{background:var(--color-primary-bg);color:var(--color-primary)}.dropdown-footer{border-top:1px solid var(--color-border-light);margin-top:.5rem;padding-top:.5rem}.dropdown-view-all{display:block;padding:.75rem 1.25rem;color:var(--color-primary);text-decoration:none;font-size:.9rem;font-weight:700;transition:all var(--transition-fast)}.dropdown-view-all:hover{background:var(--color-primary-bg)}@media(max-width:1024px){.dropdown-menu{display:none}}.mobile-menu-overlay{position:fixed;inset:0;background:#00000080;z-index:9999;animation:fadeIn .2s ease-out}.mobile-menu{position:fixed;top:0;right:0;width:85%;max-width:360px;height:100vh;background:var(--color-card);box-shadow:var(--shadow-xl);display:flex;flex-direction:column;animation:slideInRight .3s ease-out;overflow:hidden}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}.mobile-menu-header{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;border-bottom:1px solid var(--color-border-light);background:var(--color-bg-secondary)}.mobile-menu-logo{font-size:1.25rem;font-weight:800;color:var(--color-text);text-decoration:none}.mobile-menu-close{width:40px;height:40px;border:none;background:var(--color-card);border-radius:var(--radius-full);font-size:1.25rem;cursor:pointer;color:var(--color-text-light);transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center}.mobile-menu-close:hover{background:var(--color-error);color:#fff}.mobile-menu-nav{flex:1;overflow-y:auto;padding:1rem 0}.mobile-menu-section{border-bottom:1px solid var(--color-border-light)}.mobile-menu-section-btn{width:100%;display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;border:none;background:transparent;font-family:Nunito,sans-serif;font-size:1.1rem;font-weight:700;color:var(--color-text);cursor:pointer;transition:all var(--transition-fast)}.mobile-menu-section-btn:hover{background:var(--color-bg-secondary)}.mobile-menu-section-btn.expanded{background:var(--color-primary-bg);color:var(--color-primary)}.mobile-menu-section-btn .chevron{font-size:.75rem;color:var(--color-text-light);transition:transform var(--transition-fast)}.mobile-menu-levels{background:var(--color-bg-secondary);padding:.5rem 0}.mobile-menu-level-btn{width:100%;display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.5rem .75rem 2.5rem;border:none;background:transparent;font-family:Nunito,sans-serif;font-size:1rem;font-weight:600;color:var(--color-text);cursor:pointer;transition:all var(--transition-fast)}.mobile-menu-level-btn:hover{background:var(--color-card)}.mobile-menu-level-btn.expanded{color:var(--color-primary);background:var(--color-card)}.mobile-menu-level-btn .chevron{font-size:.65rem;color:var(--color-text-light)}.mobile-menu-subjects{list-style:none;padding:.25rem 0;margin:0;background:var(--color-card)}.mobile-menu-subjects li a{display:block;padding:.625rem 1.5rem .625rem 3.5rem;color:var(--color-text-light);text-decoration:none;font-size:.95rem;font-weight:500;transition:all var(--transition-fast)}.mobile-menu-subjects li a:hover{background:var(--color-primary-bg);color:var(--color-primary);padding-left:4rem}.mobile-menu-link{display:flex;align-items:center;gap:.75rem;padding:1rem 1.5rem;color:var(--color-text);text-decoration:none;font-size:1.1rem;font-weight:700;border-bottom:1px solid var(--color-border-light);transition:all var(--transition-fast)}.mobile-menu-link:hover,.mobile-menu-link.active{background:var(--color-primary-bg);color:var(--color-primary)}.mobile-menu-footer{padding:1.5rem;background:var(--color-bg-secondary);text-align:center;border-top:1px solid var(--color-border-light)}.mobile-menu-footer p{margin:0;font-size:.9rem;color:var(--color-text-light);font-weight:600}.navbar{background:var(--color-card);border-bottom:1px solid var(--color-border-light);padding:0;position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--navbar-height);box-shadow:var(--shadow-sm)}.navbar-content{display:flex;align-items:center;justify-content:flex-start;height:100%;gap:2rem;max-width:100%;margin:0;padding:0 1.5rem}.navbar-brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;transition:transform var(--transition-fast);flex-shrink:0}.navbar-brand:hover{transform:scale(1.02)}.brand-logo{height:40px;width:auto}.brand-text{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-links{display:flex;align-items:center;gap:.5rem;height:100%;margin-left:auto}.nav-link{display:flex;align-items:center;gap:.35rem;padding:.75rem 1.25rem;color:var(--color-text);text-decoration:none;font-weight:600;font-size:1rem;border-radius:var(--radius-lg);transition:all var(--transition-fast);border:none;background:transparent;cursor:pointer;font-family:Nunito,sans-serif}.nav-link:hover,.nav-link.active{color:var(--color-primary);background:var(--color-primary-bg)}.nav-dropdown-trigger{position:relative}.dropdown-arrow{font-size:.6rem;opacity:.6;transition:transform var(--transition-fast)}.nav-dropdown-trigger.active .dropdown-arrow{transform:rotate(180deg)}.nav-dropdown{position:relative;height:100%;display:flex;align-items:center}.mobile-menu-btn{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;border:none;background:var(--color-bg-secondary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);margin-left:auto}.mobile-menu-btn:hover{background:var(--color-primary-bg)}.hamburger-line{width:22px;height:2.5px;background:var(--color-text);border-radius:var(--radius-full);transition:all var(--transition-fast)}.mobile-menu-btn:hover .hamburger-line{background:var(--color-primary)}@media(max-width:1024px){.hide-mobile{display:none!important}.navbar-content{padding:0 1rem;justify-content:flex-start}.brand-text{font-size:1.25rem}.brand-logo{height:32px}}@media(min-width:1025px){.hide-desktop{display:none!important}}.footer{background:linear-gradient(180deg,var(--color-bg-secondary) 0%,#E2E8F0 100%);padding:0 0 1.5rem;margin-top:auto;position:relative}.footer-wave{height:100px;margin-bottom:-1px}.footer-wave svg{width:100%;height:100%;display:block}.footer-content{display:flex;flex-direction:column;gap:2rem}.footer-main{display:flex;justify-content:space-between;gap:2rem}.footer-brand{max-width:300px}.footer-logo{display:flex;align-items:center;gap:.75rem;margin-bottom:.75rem}.footer-brand h3{color:var(--color-primary);margin:0;font-size:1.35rem}.footer-brand p{color:var(--color-text-light);font-size:.95rem;margin-bottom:.25rem}.footer-tagline{color:var(--color-success);font-weight:700;font-size:.9rem!important}.footer-nav{display:flex;gap:3rem}.footer-nav-group h4{color:var(--color-text);font-size:.9rem;font-weight:700;margin-bottom:.75rem;text-transform:uppercase;letter-spacing:.05em}.footer-nav-group a{display:block;color:var(--color-text-light);font-size:.9rem;margin-bottom:.5rem;transition:all var(--transition-fast)}.footer-nav-group a:hover{color:var(--color-primary);transform:translate(4px)}.footer-error{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:1rem 1.5rem;background:var(--color-card);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);font-size:.9rem;color:var(--color-text-light)}.error-icon{font-size:1.1rem}.footer-error a{color:var(--color-primary);font-weight:700}.footer-error a:hover{text-decoration:underline}.footer-disclaimer{display:flex;align-items:flex-start;gap:.75rem;padding:1.25rem 1.5rem;background:#fef3c7;border:1px solid var(--color-accent);border-radius:var(--radius-lg);font-size:.85rem;color:#78350f}.disclaimer-icon{font-size:1.25rem;flex-shrink:0}.footer-disclaimer strong{color:#92400e}.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:1.5rem;border-top:1px solid var(--color-border-light)}.footer-copyright{font-size:.85rem;color:var(--color-text-light);margin:0}.footer-free{font-size:.85rem;font-weight:700;color:var(--color-success);margin:0}@media(max-width:1024px){.footer-main{flex-direction:column}.footer-brand{max-width:100%;text-align:center}.footer-logo{justify-content:center}.footer-nav{justify-content:center;flex-wrap:wrap;gap:2rem}.footer-nav-group{text-align:center}.footer-nav-group a:hover{transform:none}}@media(max-width:768px){.footer{padding:2rem 0 1rem}.footer-content,.footer-nav{gap:1.5rem}.footer-error{flex-direction:column;text-align:center;gap:.25rem;padding:1rem}.footer-disclaimer{flex-direction:column;text-align:center;padding:1rem}.footer-bottom{flex-direction:column;gap:.5rem;text-align:center}}.audio-player{position:fixed;bottom:0;left:0;right:0;background:var(--color-card);border-top:1px solid var(--color-border-light);box-shadow:0 -4px 20px #0000001a;z-index:1000;transition:transform var(--transition-normal)}.audio-player.minimized{transform:translateY(calc(100% - 56px))}.player-content{max-width:var(--max-width);margin:0 auto;padding:1rem 1.5rem;display:flex;align-items:center;gap:1.25rem}.player-toggle{background:var(--color-bg-secondary);border:2px solid var(--color-border);border-radius:var(--radius-full);width:36px;height:36px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);flex-shrink:0}.player-toggle:hover{background:var(--color-primary-bg);border-color:var(--color-primary)}.toggle-icon{font-size:.75rem;color:var(--color-text-light)}.player-toggle:hover .toggle-icon{color:var(--color-primary)}.player-info{min-width:180px;max-width:220px}.track-title{display:block;font-weight:700;font-size:.95rem;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:.15rem}.track-subject{display:block;font-size:.8rem;color:var(--color-text-light);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-controls{flex:1;display:flex;align-items:center;gap:1.25rem}.play-btn{width:52px;height:52px;border-radius:var(--radius-full);border:none;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal);flex-shrink:0;box-shadow:0 4px 12px #3b82f64d}.play-btn:hover:not(:disabled){transform:scale(1.05);box-shadow:0 6px 20px #3b82f666}.play-btn:active:not(:disabled){transform:scale(.98)}.play-btn:disabled{background:var(--color-border);box-shadow:none;cursor:not-allowed}.play-icon{font-size:1.25rem}.progress-container{flex:1;display:flex;align-items:center;gap:.75rem}.time{font-size:.8rem;font-weight:600;color:var(--color-text-light);min-width:42px;font-variant-numeric:tabular-nums}.current-time{text-align:right}.duration-time{text-align:left}.progress-track{flex:1;position:relative;height:8px;background:var(--color-border);border-radius:var(--radius-full);overflow:hidden}.progress-bar{position:absolute;top:0;left:0;width:100%;height:100%;-webkit-appearance:none;appearance:none;background:transparent;cursor:pointer;z-index:2}.progress-bar::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:var(--radius-full);background:var(--color-primary);cursor:pointer;box-shadow:0 2px 6px #3b82f666;transition:transform var(--transition-fast)}.progress-bar::-webkit-slider-thumb:hover{transform:scale(1.2)}.progress-bar::-moz-range-thumb{width:16px;height:16px;border-radius:var(--radius-full);background:var(--color-primary);cursor:pointer;border:none;box-shadow:0 2px 6px #3b82f666}.progress-bar:disabled{cursor:not-allowed}.progress-bar:disabled::-webkit-slider-thumb{background:var(--color-text-lighter);box-shadow:none}.progress-bar:disabled::-moz-range-thumb{background:var(--color-text-lighter);box-shadow:none}.progress-fill{position:absolute;top:0;left:0;height:100%;background:linear-gradient(90deg,var(--color-primary) 0%,var(--color-primary-light) 100%);border-radius:var(--radius-full);pointer-events:none;z-index:1}.speed-control{display:flex;align-items:center;gap:.5rem}.speed-label{font-size:.75rem;font-weight:600;color:var(--color-text-lighter);text-transform:uppercase;letter-spacing:.03em}.speed-select{padding:.5rem .75rem;border:2px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);font-family:Nunito,sans-serif;font-size:.85rem;font-weight:600;color:var(--color-text);cursor:pointer;transition:all var(--transition-fast)}.speed-select:hover{border-color:var(--color-primary)}.speed-select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f626}@media(max-width:1024px){.player-info{min-width:140px;max-width:180px}.speed-label{display:none}}@media(max-width:768px){.audio-player.minimized{transform:translateY(calc(100% - 50px))}.player-content{flex-wrap:wrap;padding:.75rem 1rem;gap:.75rem}.player-toggle{width:32px;height:32px}.player-info{flex:1;min-width:auto;max-width:none}.player-controls{width:100%;order:3;gap:1rem}.play-btn{width:44px;height:44px}.play-icon{font-size:1rem}.progress-container{flex:1}.progress-track{height:6px}.progress-bar::-webkit-slider-thumb{width:14px;height:14px}.progress-bar::-moz-range-thumb{width:14px;height:14px}.speed-select{padding:.4rem .6rem;font-size:.8rem}}@media(max-width:480px){.time{min-width:36px;font-size:.75rem}.speed-control{display:none}}:root{--color-primary: #3B82F6;--color-primary-light: #60A5FA;--color-primary-dark: #2563EB;--color-primary-bg: #EFF6FF;--color-secondary: #F97316;--color-secondary-light: #FB923C;--color-secondary-dark: #EA580C;--color-accent: #FACC15;--color-accent-light: #FDE047;--color-success: #22C55E;--color-success-light: #4ADE80;--color-error: #EF4444;--color-fun-purple: #A855F7;--color-fun-pink: #EC4899;--color-fun-cyan: #06B6D4;--color-fun-lime: #84CC16;--color-bg: #F8FAFC;--color-bg-secondary: #F1F5F9;--color-bg-warm: #FFFBF5;--color-bg-gradient: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 50%, #F0FDF4 100%);--color-bg-hero: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 50%, #FEF3C7 100%);--color-card: #FFFFFF;--color-text: #1E293B;--color-text-light: #64748B;--color-text-lighter: #94A3B8;--color-english: #3B82F6;--color-english-bg: #EFF6FF;--color-math: #F97316;--color-math-bg: #FFF7ED;--color-science: #22C55E;--color-science-bg: #F0FDF4;--color-chinese: #EF4444;--color-chinese-bg: #FEF2F2;--color-malay: #A855F7;--color-malay-bg: #FAF5FF;--color-tamil: #14B8A6;--color-tamil-bg: #F0FDFA;--color-history: #F59E0B;--color-history-bg: #FFFBEB;--color-geography: #10B981;--color-geography-bg: #ECFDF5;--color-physics: #6366F1;--color-physics-bg: #EEF2FF;--color-chemistry: #EC4899;--color-chemistry-bg: #FDF2F8;--color-biology: #84CC16;--color-biology-bg: #F7FEE7;--color-border: #E2E8F0;--color-border-light: #F1F5F9;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-2xl: 32px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12);--shadow-xl: 0 16px 48px rgba(0, 0, 0, .16);--shadow-color: 0 4px 16px rgba(59, 130, 246, .25);--shadow-color-lg: 0 8px 32px rgba(59, 130, 246, .3);--shadow-playful: 0 10px 40px rgba(59, 130, 246, .2), 0 0 0 4px rgba(59, 130, 246, .1);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--transition-bounce: .4s cubic-bezier(.68, -.55, .265, 1.55);--transition-spring: .5s cubic-bezier(.175, .885, .32, 1.275);--transition-jelly: .4s cubic-bezier(.25, .46, .45, .94);--max-width: 1200px;--navbar-height: 72px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{font-family:Nunito,-apple-system,BlinkMacSystemFont,Segoe 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1.75rem;border-radius:var(--radius-lg);font-family:Nunito,sans-serif;font-weight:700;font-size:1rem;cursor:pointer;transition:all var(--transition-normal);border:none;text-decoration:none}.btn:hover{transform:translateY(-2px);text-decoration:none}.btn:active{transform:translateY(0)}.btn-primary{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:#fff;box-shadow:var(--shadow-color)}.btn-primary:hover{box-shadow:0 6px 24px #3b82f659;color:#fff}.btn-secondary{background:var(--color-card);color:var(--color-text);border:2px solid var(--color-border)}.btn-secondary:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-bg)}.btn-accent{background:linear-gradient(135deg,var(--color-secondary) 0%,var(--color-secondary-dark) 100%);color:#fff;box-shadow:0 4px 16px #f973164d}.btn-accent:hover{box-shadow:0 6px 24px #f9731666;color:#fff}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.card{background:var(--color-card);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.level-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:2rem 1.5rem;cursor:pointer;text-decoration:none;border:2px solid transparent}.level-card:hover{border-color:var(--color-primary);background:var(--color-primary-bg)}.level-card h3{color:var(--color-primary);margin-bottom:.5rem;font-size:1.25rem}.level-card p{color:var(--color-text-light);font-size:.9rem;margin:0}.subject-card{display:flex;align-items:center;gap:1rem;padding:1.25rem 1.5rem;border-left:4px solid var(--subject-color, var(--color-primary));text-decoration:none;background:var(--color-card)}.subject-card:hover{background:var(--subject-bg, var(--color-primary-bg));border-color:var(--subject-color, var(--color-primary))}.subject-icon{font-size:2rem;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--subject-bg, var(--color-primary-bg));border-radius:var(--radius-md)}.subject-info h4{margin-bottom:.25rem;color:var(--color-text)}.subject-info p{color:var(--color-text-light);font-size:.85rem;margin:0}.tabs{display:flex;gap:.5rem;padding:.5rem;background:var(--color-bg-secondary);border-radius:var(--radius-lg);margin-bottom:2rem;overflow-x:auto}.tab{padding:.75rem 1.25rem;border:none;background:transparent;cursor:pointer;font-family:Nunito,sans-serif;font-size:.95rem;font-weight:600;color:var(--color-text-light);border-radius:var(--radius-md);transition:all 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