:root{--font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--color-bg: #f4f7fb;--color-bg-strong: #e8eef5;--color-surface: #ffffff;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: rgba(15, 23, 42, .08);--color-border-strong: rgba(15, 23, 42, .12);--color-accent: #0ea5e9;--color-accent-hover: #0284c7;--color-accent-soft: rgba(14, 165, 233, .12);--color-accent-glow: rgba(14, 165, 233, .35);--color-success: #10b981;--color-danger: #ef4444;--color-warn: #f59e0b;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);--shadow-md: 0 4px 14px rgba(15, 23, 42, .07), 0 2px 4px rgba(15, 23, 42, .04);--shadow-lg: 0 20px 50px rgba(15, 23, 42, .1), 0 8px 16px rgba(15, 23, 42, .06);--header-h: 4rem}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font-sans);background:var(--color-bg);background-image:radial-gradient(ellipse 80% 55% at 50% -20%,rgba(14,165,233,.15),transparent),radial-gradient(ellipse 60% 40% at 100% 0%,rgba(99,102,241,.08),transparent),radial-gradient(at 12% 24%,rgba(14,165,233,.04) 0px,transparent 50%);background-attachment:fixed;min-height:100vh;color:var(--color-text);line-height:1.55;overflow-x:hidden}#root{min-height:100vh}.app-shell{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;width:100%}h1,h2{letter-spacing:-.02em;font-weight:700;color:var(--color-text)}.common-btn{font-family:var(--font-sans);display:inline-flex;align-items:center;justify-content:center;gap:.5rem;background:linear-gradient(135deg,var(--color-accent) 0%,#6366f1 100%);color:#fff;padding:.75rem 1.5rem;font-size:.95rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:transform .18s ease,box-shadow .22s ease,filter .18s ease;box-shadow:0 4px 14px var(--color-accent-glow),var(--shadow-sm);margin-top:10px;text-decoration:none}.common-btn:hover{transform:translateY(-2px);filter:brightness(1.05);box-shadow:0 8px 24px #6366f159,var(--shadow-md)}.common-btn:active{transform:translateY(0)}.common-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.common-btn.common-btn--danger{background:linear-gradient(135deg,#ef4444,#dc2626);box-shadow:0 4px 14px #ef44444d}.common-btn.common-btn--danger:hover{filter:brightness(1.06)}input:not([type=radio]):not([type=checkbox]),textarea,select{font-family:var(--font-sans)}input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{width:100%;max-width:100%;padding:.7rem .95rem;border-radius:var(--radius-sm);border:1px solid var(--color-border-strong);background:var(--color-surface);color:var(--color-text);font-size:1rem;margin:.5rem 0 1rem;transition:border-color .2s ease,box-shadow .2s ease}textarea{resize:vertical;min-height:6rem}input:focus-visible,textarea:focus-visible,select:focus-visible{border-color:var(--color-accent);outline:none;box-shadow:0 0 0 3px var(--color-accent-soft)}.quiz-container{max-width:min(900px,100% - 2rem);margin:clamp(1rem,4vw,2rem) auto;padding:clamp(1.25rem,4vw,2rem);background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-lg);animation:page-enter .45s cubic-bezier(.22,1,.36,1)}.quiz-container h1{text-align:center;margin-bottom:1rem;font-size:clamp(1.5rem,4vw,2rem)}@keyframes page-enter{0%{opacity:0;transform:translateY(12px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}.question-box{background:var(--color-bg-strong);border-radius:var(--radius-md);padding:clamp(1rem,3vw,1.35rem);margin:1.25rem 0;border:1px solid var(--color-border);border-left:4px solid var(--color-accent);transition:transform .22s ease,box-shadow .22s ease}.question-box:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.question-box h2{text-align:left;font-size:1.1rem;margin-bottom:1rem;color:var(--color-text)}.question-box ol{list-style:none}.question-box li{margin:10px 0;padding:.65rem .85rem;border-radius:var(--radius-sm);border:1px solid var(--color-border);background:var(--color-surface);cursor:pointer;transition:background .2s ease,border-color .2s ease}.question-box li:hover{border-color:var(--color-accent);background:var(--color-accent-soft)}.correct{color:var(--color-success);font-weight:600;margin-top:10px}.incorrect{color:var(--color-danger);font-weight:600;margin-top:10px}.score{text-align:center;font-size:clamp(1.25rem,3vw,1.65rem);font-weight:700;color:var(--color-text);margin-top:1.75rem;background:linear-gradient(135deg,var(--color-accent-soft),rgba(99,102,241,.08));padding:1rem 1.25rem;border-radius:var(--radius-md);border:1px solid var(--color-border)}@media (max-width: 640px){.quiz-container{padding:1rem}.quiz-container .common-btn{width:100%}.home-cta .common-btn{width:100%;max-width:20rem}}.home-root{width:100%}.hero{position:relative;isolation:isolate;padding:clamp(3rem,10vw,6rem) clamp(1rem,5vw,2rem) clamp(3.5rem,12vw,6.5rem);overflow:hidden}.hero__backdrop{position:absolute;inset:-20% -10% auto;height:140%;z-index:-1;pointer-events:none;opacity:.9;background:radial-gradient(ellipse 100% 80% at 50% -10%,rgba(14,165,233,.2),transparent 55%),radial-gradient(circle at 85% 20%,rgba(99,102,241,.12),transparent 40%),linear-gradient(180deg,rgba(248,250,252,.95),var(--color-bg));filter:saturate(105%)}.hero__backdrop:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;opacity:.45;background-image:radial-gradient(circle at 1px 1px,rgba(15,23,42,.08) 1px,transparent 0);background-size:28px 28px;-webkit-mask-image:linear-gradient(180deg,black 0%,transparent 90%);mask-image:linear-gradient(180deg,black 0%,transparent 90%)}.hero__content{max-width:720px;margin:0 auto;text-align:center}.hero__badge{display:inline-flex;align-items:center;justify-content:center;font-size:.8125rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:#8a4fff;background:#8a4fff1a;border:1px solid rgba(138,79,255,.3);border-radius:999px;padding:.35rem 1rem;margin-bottom:1.5rem;animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.hero__title{font-size:clamp(2.5rem,8vw,4.5rem);line-height:1.05;font-weight:900;letter-spacing:-.04em;color:#1e293b;margin-bottom:1.5rem}.hero__title span{background:linear-gradient(90deg,#8a4fff,#00d2ff,#8a4fff);background-size:200% auto;-webkit-background-clip:text;background-clip:text;color:transparent;animation:gradientText 3s linear infinite}@keyframes gradientText{to{background-position:200% center}}.hero__lead{font-size:clamp(1.1rem,2.5vw,1.25rem);color:#64748b;max-width:40rem;margin:0 auto 2.5rem;line-height:1.6}.hero__actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:1.25rem}.hero-cta{padding:1rem 2.5rem;font-size:1.1rem;font-weight:700;background:#8a4fff;color:#fff;border-radius:14px;transition:all .3s cubic-bezier(.175,.885,.32,1.275);box-shadow:0 10px 20px #8a4fff4d;margin-top:0}.hero-cta:hover{transform:scale(1.08) translateY(-3px);box-shadow:0 15px 30px #8a4fff80;background:#7135e6}.hero__secondary{font-family:inherit;font-size:1.1rem;font-weight:700;color:#1e293b;background:#fff;border:2px solid #e2e8f0;padding:1rem 2.5rem;border-radius:14px;cursor:pointer;transition:all .3s ease}.hero__secondary:hover{background:#f8fafc;border-color:#8a4fff;color:#8a4fff;transform:translateY(-2px);box-shadow:0 5px 15px #0000000d}@media (max-width: 640px){.hero__actions .common-btn,.hero__secondary{width:100%}}.testimonials-section{padding:100px 20px;background-color:#f8fafc;font-family:Inter,sans-serif}.testimonials-container{max-width:1200px;margin:0 auto}.testimonials-header{text-align:center;margin-bottom:60px}.testimonials-header .subtitle{color:#8a4fff;font-weight:700;text-transform:uppercase;letter-spacing:2px;font-size:14px;display:block;margin-bottom:10px}.testimonials-header h2{font-size:clamp(2rem,5vw,2.8rem);color:#1e293b;font-weight:800;margin-bottom:15px}.testimonials-header p{color:#64748b;font-size:18px;max-width:600px;margin:0 auto}.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}.testimonial-card{background:#fff;padding:40px 30px;border-radius:24px;box-shadow:0 10px 30px #00000008;border:1px solid #f1f5f9;position:relative;transition:all .3s ease;display:flex;flex-direction:column}.testimonial-card:hover{transform:translateY(-10px);box-shadow:0 20px 40px #8a4fff1a;border-color:#8a4fff44}.quote-icon{position:absolute;top:20px;right:30px;font-size:60px;color:#8a4fff15;font-family:serif;line-height:1}.rating-stars{margin-bottom:15px}.star{color:#e2e8f0;font-size:18px;margin-right:2px}.star.filled{color:#f59e0b}.testimonial-card .message{font-size:16px;line-height:1.7;color:#475569;margin-bottom:30px;flex:1}.user-profile{display:flex;align-items:center;gap:15px;border-top:1px solid #f1f5f9;padding-top:25px}.user-image img{width:50px;height:50px;border-radius:50%;object-fit:cover;border:2px solid #8a4fff33}.user-name{font-size:16px;font-weight:700;color:#1e293b;margin-bottom:2px}.user-position{font-size:13px;color:#94a3b8;font-weight:500}@media (max-width: 768px){.testimonials-section{padding:60px 20px}}.site-header{position:sticky;top:0;z-index:1000;height:80px;background:#0f172ae6;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border-bottom:1px solid rgba(255,255,255,.1);box-shadow:0 10px 30px #0003}.site-header__inner{max-width:1200px;margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;gap:30px}.site-header__brand{font-size:1.4rem;font-weight:800;color:#fff;cursor:pointer;letter-spacing:-.04em;display:inline-flex;align-items:center;gap:12px;margin-right:auto;transition:all .3s ease}.site-header__brand:hover{transform:scale(1.05);text-shadow:0 0 15px rgba(138,79,255,.5)}.site-header__logo-mark{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;font-size:1.2rem;font-weight:900;color:#fff;background:linear-gradient(135deg,#8a4fff,#00d2ff);box-shadow:0 8px 15px #8a4fff66;animation:glowPulse 2s infinite ease-in-out}@keyframes glowPulse{0%,to{box-shadow:0 8px 15px #8a4fff66}50%{box-shadow:0 12px 25px #8a4fffb3;transform:translateY(-1px)}}.site-header__nav{display:flex;align-items:center}.site-header__nav-links{display:flex;align-items:center;gap:25px}.header__link{position:relative;font-size:15px;font-weight:600;color:#94a3b8;text-decoration:none;padding:8px 0;transition:all .3s ease;white-space:nowrap}.header__link:hover{color:#fff;text-shadow:0 0 10px rgba(255,255,255,.3)}.header__link:after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:linear-gradient(90deg,#8a4fff,#00d2ff);transition:all .3s cubic-bezier(.175,.885,.32,1.275);transform:translate(-50%);border-radius:10px}.header__link:hover:after{width:100%}.header__link--accent{color:#00d2ff}.site-header__signup{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-size:14px;font-weight:700;color:#fff;text-decoration:none;border-radius:12px;background:linear-gradient(135deg,#8a4fff,#00d2ff);box-shadow:0 8px 20px #8a4fff4d;transition:all .3s cubic-bezier(.175,.885,.32,1.275);white-space:nowrap}.site-header__signup:hover{transform:scale(1.08) translateY(-2px);box-shadow:0 12px 25px #8a4fff80}.site-header__menu-btn{display:none}@media (max-width: 992px){.site-header__menu-btn{display:flex;order:-1;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}.site-header__inner{justify-content:space-between}.site-header__nav{position:absolute;top:80px;left:0;width:100%;background:#0f172a;flex-direction:column;max-height:0;overflow:hidden;transition:all .3s ease}.site-header__nav--open{max-height:500px;padding:20px 0;border-bottom:1px solid rgba(255,255,255,.1)}.site-header__nav-links{flex-direction:column;width:100%}.header__link{width:100%;text-align:center;padding:15px}.header__link:after{display:none}}.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - var(--header-h) - 4rem);padding:clamp(1.75rem,5vw,3rem) 1rem;animation:page-enter .45s cubic-bezier(.22,1,.36,1)}.auth-page .auth-form{width:100%;max-width:400px;background:var(--color-surface);padding:clamp(1.85rem,5vw,2.65rem);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-lg);text-align:center}.auth-page .auth-form h2{font-size:1.5rem;font-weight:800;letter-spacing:-.03em;margin-bottom:1.35rem;color:var(--color-text);background:linear-gradient(120deg,var(--color-accent) 0%,#6366f1 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.auth-page .auth-form form{text-align:left}.auth-page .auth-form label{font-size:.8275rem;font-weight:600;color:var(--color-text-muted);margin-bottom:.25rem;display:block}.auth-page .auth-form input{width:100%;padding:.7rem .92rem;margin-bottom:1rem;border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);font-size:.9425rem;background:var(--color-bg);color:var(--color-text);transition:border-color .2s ease,box-shadow .2s ease}.auth-page .auth-form input:focus{border-color:var(--color-accent);outline:none;box-shadow:0 0 0 3px var(--color-accent-soft)}.auth-page .auth-form button:not(.secondary-link){width:100%;padding:.75rem;margin-top:.35rem;border:none;border-radius:var(--radius-md);font-size:.95rem;font-weight:600;cursor:pointer;color:#fff;background:linear-gradient(135deg,var(--color-accent) 0%,#6366f1 100%);box-shadow:0 8px 24px var(--color-accent-glow);transition:transform .18s ease,filter .18s ease}.auth-page .auth-form button:not(.secondary-link):hover{transform:translateY(-2px);filter:brightness(1.04)}.auth-page .auth-form a.secondary-link{display:inline-block;margin-top:1.15rem;font-size:.8925rem;font-weight:600;color:var(--color-accent-strong);text-decoration:none}.auth-page .auth-form a.secondary-link:hover{text-decoration:underline}.auth-page .auth-form p{margin-top:1.25rem;text-align:center;font-size:.8925rem;color:var(--color-text-muted)}.auth-page .auth-form p a{color:var(--color-accent-strong);font-weight:600;margin-left:.35rem;text-decoration:none}.auth-page .auth-form p a:hover{text-decoration:underline}.auth-page .auth-form button:disabled{opacity:.72;cursor:not-allowed;transform:none}footer{background:#0f172a;color:#cbd5e1;padding:clamp(2.75rem,7vw,4rem) clamp(1.25rem,4vw,2rem);border-top:1px solid rgba(148,163,184,.12);margin-top:auto}.footer-content{max-width:980px;margin:0 auto}.footer-content p{font-size:.95rem;line-height:1.65;text-align:center;margin-bottom:1.35rem;color:#94a3b8}.footer-content>p a{color:#38bdf8;text-decoration:none;font-weight:600;margin-left:.25rem;transition:color .18s ease,text-decoration .18s ease}.footer-content>p a:hover{color:#7dd3fc;text-decoration:underline}.social-links{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:.75rem 1.35rem}.social-links a{display:inline-flex;align-items:center;justify-content:center;width:2.6rem;height:2.6rem;border-radius:50%;color:#e2e8f0;font-size:1.125rem;background:#f8fafc0f;border:1px solid rgba(248,250,252,.08);transition:transform .22s ease,background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease}.social-links a:hover{transform:translateY(-3px);color:#fff;background:#0ea5e933;border-color:#38bdf859;box-shadow:0 12px 28px #0003}@media (max-width: 480px){.footer-content p{font-size:.875rem}}.about.section-pad,.about{padding:clamp(1.75rem,5vw,3.5rem) clamp(1rem,4vw,1.5rem);min-height:50vh;width:100%}.about .about-content{max-width:720px;margin:0 auto;background:var(--color-surface);border-radius:var(--radius-lg);padding:clamp(1.85rem,5vw,3rem);border:1px solid var(--color-border);box-shadow:var(--shadow-lg)}.about .about-content h2{font-size:clamp(1.5rem,4vw,2rem);color:var(--color-text);margin-bottom:1.35rem;text-align:center;letter-spacing:-.03em}.about .about-content p{font-size:clamp(1rem,2.8vw,1.0875rem);color:var(--color-text-muted);line-height:1.75}.about .about-content:hover{border-color:#0ea5e940}.profile{background:var(--color-surface);padding:clamp(1.85rem,5vw,2.65rem);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-lg);width:min(100% - 2rem,26rem);margin:clamp(2rem,8vw,4rem) auto}.profile h2{font-size:1.375rem;font-weight:800;letter-spacing:-.03em;margin-bottom:1rem;text-align:center}.profile-info{text-align:left}.profile-info p{margin-bottom:1rem;color:var(--color-text-muted);font-size:.95rem}.profile-info strong{color:var(--color-text);font-weight:600;display:block;margin-top:.15rem}.profile-info .common-btn{width:100%;justify-content:center;margin-top:.85rem!important}.loading-page{display:flex;align-items:center;justify-content:center;height:80vh}.loader{border:5px solid white;border-top:5px solid rgb(210,246,3);border-radius:50%;width:50px;height:50px;animation:spin 2s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.course-card{display:flex;flex-direction:column;width:100%;height:100%;margin:0;padding:clamp(1rem,3vw,1.35rem);text-align:left;background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);box-shadow:var(--shadow-md);transition:transform .28s cubic-bezier(.22,1,.36,1),box-shadow .28s ease,border-color .28s ease}.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#0ea5e940}.course-card .course-image{width:100%;aspect-ratio:16 / 10;object-fit:cover;border-radius:var(--radius-md);margin-bottom:1rem;background:linear-gradient(145deg,var(--color-bg-strong),rgba(99,102,241,.08))}.course-card h3{font-size:1.075rem;font-weight:700;color:var(--color-text);margin-bottom:.65rem;letter-spacing:-.02em;line-height:1.3}.course-card__body{flex:1;margin-bottom:.85rem}.course-card .course-card__body p{font-size:.875rem;color:var(--color-text-muted);margin-bottom:.35rem;line-height:1.5}.course-card .course-card__body p:last-of-type{margin-bottom:0}.course-card .course-card__body strong{color:var(--color-text);font-weight:600}.course-card__price{font-weight:700!important;color:var(--color-text)!important;margin-top:.35rem!important;font-size:1rem!important}.course-card__actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:auto}.course-card__actions .common-btn{margin-top:0;font-size:.8425rem;padding:.58rem 1rem}@media (max-width: 480px){.course-card__actions .common-btn{flex:1 1 calc(50% - .25rem);min-width:8rem}}.admin-btns{display:flex;flex-wrap:wrap;gap:.5rem;width:100%}.admin-btns .common-btn{flex:1 1 calc(33.33% - .5rem);min-width:80px;font-size:.75rem;padding:.5rem .25rem}.edit-btn{background-color:#f39c12!important}.edit-btn:hover{background-color:#e67e22!important}.courses-page-wrapper{min-height:100vh;background-color:#fcfaff;font-family:Outfit,sans-serif;overflow-x:hidden}.courses-hero{background:linear-gradient(135deg,#6366f1,#a855f7,#ec4899);padding:100px 20px;text-align:center;color:#fff;position:relative;overflow:hidden}.courses-hero:before{content:"";position:absolute;top:-50%;left:-20%;width:140%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 60%);animation:rotate 20s linear infinite}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.hero-content{max-width:850px;margin:0 auto;position:relative;z-index:2}.hero-content h1{font-size:clamp(2.8rem,7vw,4.5rem);font-weight:900;margin-bottom:15px;line-height:1.1;text-shadow:0 10px 20px rgba(0,0,0,.1)}.hero-content p{font-size:1.3rem;opacity:.95;margin-bottom:45px;font-weight:500}.search-box-container{max-width:650px;margin:0 auto}.search-input-group{background:#ffffff26;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);padding:10px 25px;border-radius:99px;display:flex;align-items:center;gap:15px;border:1px solid rgba(255,255,255,.3);box-shadow:0 15px 35px #0000001a;transition:all .4s cubic-bezier(.175,.885,.32,1.275)}.search-input-group:focus-within{background:#ffffff40;transform:scale(1.05);box-shadow:0 20px 40px #0003}.search-icon{font-size:24px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.search-input-group input{flex:1;border:none;padding:12px 0;font-size:18px;outline:none;color:#fff;background:transparent;font-weight:500}.search-input-group input::placeholder{color:#ffffffb3}.courses-main-content{max-width:1300px;margin:0 auto;padding:80px 20px}.filter-section{display:flex;justify-content:center;flex-direction:column;align-items:center;margin-bottom:60px;gap:25px}.category-pills{display:flex;gap:15px;flex-wrap:wrap;justify-content:center}.category-pill{padding:12px 28px;background:#fff;border:2px solid #f0f0f0;border-radius:20px;font-size:15px;font-weight:700;color:#4b5563;cursor:pointer;transition:all .3s;box-shadow:0 4px 6px #00000005}.category-pill:hover{transform:translateY(-3px);box-shadow:0 10px 20px #0000000d;border-color:#8a4fff55}.category-pill.active{background:#8a4fff;border-color:#8a4fff;color:#fff;box-shadow:0 10px 25px #8a4fff4d}.course-count{font-size:16px;color:#a0aec0;font-weight:700;text-transform:uppercase;letter-spacing:1px}.courses-grid-layout{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:40px}.no-results-state{grid-column:1 / -1;text-align:center;padding:100px 20px;background:#fff;border-radius:40px;border:3px dashed #f0f0f0;animation:pulse 2s infinite}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.01)}to{transform:scale(1)}}.empty-icon{font-size:80px;margin-bottom:30px}.no-results-state h3{font-size:32px;color:#1a202c;margin-bottom:15px;font-weight:800}.no-results-state p{color:#718096;font-size:18px;margin-bottom:40px}.reset-btn{padding:15px 40px;background:#ff6b6b;border:none;border-radius:15px;font-weight:800;color:#fff;cursor:pointer;transition:all .3s;box-shadow:0 10px 20px #ff6b6b33}.reset-btn:hover{background:#fa5252;transform:translateY(-3px) scale(1.05)}@media (max-width: 600px){.courses-hero{padding:80px 15px}.category-pill{padding:10px 20px;font-size:14px}}.course-description{padding:60px 20px;text-align:center;min-height:60vh;background:linear-gradient(to right,#f9f9f9,#eef2f3);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.course-description .course-header{display:flex;align-items:flex-start;justify-content:center;flex-wrap:wrap;gap:40px;margin-bottom:50px}.course-description .course-header .course-image{width:250px;height:170px;object-fit:cover;border-radius:14px;box-shadow:0 8px 24px #00000026;transition:transform .4s ease}.course-description .course-header .course-image:hover{transform:scale(1.05)}.course-description .course-header .course-info{max-width:600px;text-align:left;background:#ffffffbf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);padding:20px 25px;border-radius:12px;box-shadow:0 4px 20px #0000001a;transition:box-shadow .3s ease}.course-description .course-header .course-info:hover{box-shadow:0 6px 30px #00000026}.course-description .course-header .course-info h2{font-size:30px;color:#1a1a1a;margin-bottom:15px;text-transform:uppercase;letter-spacing:1px}.course-description .course-header .course-info p{font-size:17px;color:#555;line-height:1.6;margin-bottom:10px}.course-description .course-description-text{font-size:18px;color:#333;max-width:850px;margin:0 auto;line-height:1.75;background:#fff;padding:20px 30px;border-radius:12px;box-shadow:0 6px 18px #00000012;border-left:5px solid #d4e157}.paymentSuccess-page{display:flex;justify-content:center;align-items:center;height:75vh;background-color:#f5f5f5}.paymentSuccess-page .success-message{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:300px}.paymentSuccess-page h2{font-size:24px;color:#d2f603;margin-bottom:15px}.paymentSuccess-page h2{font-style:18px;color:#d2f603;margin-bottom:20px}.paymentSuccess-page a{text-decoration:none}.student-dashboard{padding:clamp(1.75rem,6vw,3.25rem) clamp(1rem,4vw,1.5rem);text-align:center;min-height:42vh;max-width:1180px;margin:0 auto}.student-dashboard h2{font-size:clamp(1.5rem,4vw,2rem);letter-spacing:-.03em;margin-bottom:.35rem}.student-dashboard .dashboard-content{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(260px,100%),1fr));gap:clamp(1rem,2.8vw,1.65rem);margin-top:2rem;justify-items:stretch}.student-dashboard .dashboard-content>p:only-child{grid-column:1 / -1;text-align:center;padding:2.75rem 1rem;color:var(--color-text-muted);background:var(--color-surface);border:1px dashed var(--color-border-strong);border-radius:var(--radius-lg)}.study-container{min-height:calc(100vh - 100px);background-color:#f8fafc;padding:40px 20px;display:flex;justify-content:center;align-items:flex-start}.study-card{width:100%;max-width:1000px;background:#fff;border-radius:24px;box-shadow:0 20px 40px #0000000d;overflow:hidden;animation:slideUp .6s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.study-header{display:flex;gap:40px;padding:40px;border-bottom:1px solid #f1f5f9}.study-image-wrapper{flex-shrink:0;width:320px;height:200px;border-radius:16px;overflow:hidden;box-shadow:0 10px 25px #0000001a}.study-image-wrapper img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}.study-image-wrapper:hover img{transform:scale(1.05)}.study-info-content{flex:1}.study-badge{display:inline-block;background:#dcfce7;color:#166534;padding:4px 12px;border-radius:99px;font-size:12px;font-weight:700;margin-bottom:12px;text-transform:uppercase}.study-info-content h1{font-size:28px;color:#1e293b;margin-bottom:12px;font-weight:800}.study-desc{color:#64748b;font-size:16px;line-height:1.6;margin-bottom:24px}.study-meta{display:flex;gap:30px}.meta-item{display:flex;align-items:center;gap:12px}.meta-icon{font-size:20px;background:#f1f5f9;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px}.meta-text label{display:block;font-size:11px;text-transform:uppercase;color:#94a3b8;font-weight:700}.meta-text span{font-size:14px;color:#334155;font-weight:600}.study-actions{padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:20px;background-color:#fafafa}.action-card{display:flex;align-items:center;gap:20px;padding:24px;background:#fff;border-radius:16px;text-decoration:none;border:1px solid #f1f5f9;transition:all .3s ease}.action-icon{font-size:28px}.action-text h3{margin:0;font-size:18px;color:#1e293b}.action-text p{margin:4px 0 0;font-size:14px;color:#64748b}.action-arrow{margin-left:auto;font-size:20px;color:#94a3b8;transition:transform .3s ease}.action-card:hover{border-color:var(--color-accent, #38bdf8);box-shadow:0 10px 20px #0000000d;transform:translateY(-5px)}.action-card:hover .action-arrow{transform:translate(5px);color:var(--color-accent, #38bdf8)}.action-card.lectures:hover{background:linear-gradient(to right,#fff,#f0f9ff)}.action-card.quiz:hover{background:linear-gradient(to right,#fff,#fef2f2)}@media (max-width: 768px){.study-header{flex-direction:column;padding:25px}.study-image-wrapper{width:100%;height:200px}.study-actions{grid-template-columns:1fr;padding:25px}}.lecture-page-container{background-color:#0f172a;min-height:100vh;padding:20px;color:#f8fafc;font-family:Inter,sans-serif}.lecture-grid{display:grid;grid-template-columns:1fr 350px;gap:24px;max-width:1400px;margin:0 auto}.lecture-view-section{display:flex;flex-direction:column;gap:20px}.main-player-card{background:#1e293b;border-radius:20px;overflow:hidden;box-shadow:0 20px 40px #0000004d}.video-viewport{width:100%;aspect-ratio:16 / 9;background:#000;display:flex;align-items:center;justify-content:center}.video-viewport video{width:100%;height:100%;object-fit:contain}.lecture-info{padding:30px}.lecture-tag{display:inline-block;background:#38bdf822;color:#38bdf8;padding:4px 12px;border-radius:99px;font-size:12px;font-weight:700;margin-bottom:15px}.lecture-info h1{font-size:28px;margin:0 0 10px;color:#f8fafc}.lecture-info p{color:#94a3b8;line-height:1.6;font-size:16px;margin:0}.lecture-sidebar{background:#1e293b;border-radius:20px;height:calc(100vh - 140px);position:sticky;top:100px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 10px 25px #0003}.sidebar-header{padding:25px;background:#334155;display:flex;justify-content:space-between;align-items:center}.sidebar-header h2{margin:0;font-size:18px;font-weight:700}.lec-count{font-size:12px;background:#ffffff1a;padding:4px 10px;border-radius:6px}.playlist-area{flex:1;overflow-y:auto;padding:15px}.playlist-area::-webkit-scrollbar{width:4px}.playlist-area::-webkit-scrollbar-thumb{background:#475569;border-radius:10px}.playlist-item-wrapper{position:relative;margin-bottom:8px}.playlist-item{display:flex;gap:15px;padding:15px;background:#ffffff08;border-radius:12px;cursor:pointer;transition:all .2s;border:1px solid transparent}.playlist-item:hover{background:#ffffff14}.playlist-item.is-active{background:#38bdf811;border-color:#38bdf855}.lec-index{width:24px;height:24px;background:#334155;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#94a3b8;flex-shrink:0}.is-active .lec-index{background:#38bdf8;color:#fff}.lec-details{display:flex;flex-direction:column;gap:4px}.lec-title{font-size:14px;font-weight:600;color:#e2e8f0}.lec-status{font-size:11px;color:#64748b}.is-active .lec-status{color:#38bdf8}.delete-lec-icon{position:absolute;right:15px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;opacity:0;transition:opacity .2s}.playlist-item-wrapper:hover .delete-lec-icon{opacity:1}.admin-actions{padding:15px 25px}.add-lec-btn{width:100%;padding:12px;background:#38bdf8;color:#fff;border:none;border-radius:10px;font-weight:700;cursor:pointer;transition:.2s}.add-lec-btn:hover{background:#0ea5e9;transform:translateY(-2px)}.admin-form-overlay{padding:20px;background:#1e293b;border-bottom:1px solid #334155}.add-lecture-form h3{margin:0 0 15px;font-size:16px}.form-field{margin-bottom:12px}.form-field label{display:block;font-size:12px;color:#94a3b8;margin-bottom:4px}.form-field input,.form-field textarea{width:100%;padding:10px;background:#0f172a;border:1px solid #334155;border-radius:8px;color:#fff;font-size:14px}.file-input-label{display:block;padding:15px;border:2px dashed #334155;border-radius:10px;text-align:center;cursor:pointer}.file-input-label input{display:none}.submit-btn{width:100%;padding:12px;background:#10b981;color:#fff;border:none;border-radius:8px;font-weight:700;cursor:pointer}@media (max-width: 1024px){.lecture-grid{grid-template-columns:1fr}.lecture-sidebar{height:auto;position:static}}.sidebar{width:220px;height:100vh;background:linear-gradient(to bottom,#0f2027,#203a43,#2c5364);color:#e0f7fa;position:fixed;top:0;left:0;padding-top:60px;border-right:1px solid #0e3c5c;transition:width .3s ease,background .5s ease;box-shadow:2px 0 10px #0006}@media (max-width: 786px){.sidebar{width:60px}}.sidebar ul{list-style:none;padding:0;margin:0}.sidebar ul li{margin-top:8px;cursor:pointer;padding:15px 22px;transition:background .3s,transform .2s ease}@media (max-width: 786px){.sidebar ul li{padding:10px;text-align:center}}.sidebar ul li:hover{background-color:#ffffff14;transform:scale(1.02)}.sidebar ul li a{display:flex;align-items:center;color:#e0f7fa;text-decoration:none;font-size:15px;transition:color .3s ease}.sidebar ul li a i{font-size:18px;transition:transform .3s}.sidebar ul li a span{margin-left:15px}@media (max-width: 786px){.sidebar ul li a span{display:none}}.sidebar ul li a:hover{color:#ffe600}.sidebar ul li a:hover i{transform:rotate(-10deg) scale(1.2)}.dashboard-admin{display:flex;margin-left:220px;padding:30px;min-height:100vh;background:linear-gradient(to right,#e0f7fa,#fff);transition:margin-left .3s ease,padding .2s}@media (max-width: 786px){.dashboard-admin{margin-left:60px;padding:15px}}.sidebar ul li{background-color:#ffffff1a}.main-content{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:20px;padding:40px 20px;background:linear-gradient(135deg,#f9f9f9,#eef3da)}.main-content .box{background:linear-gradient(135deg,#d2f603,#b0cb00);padding:15px 25px;border-radius:12px;text-align:center;color:#1c1c1c;font-weight:600;font-size:16px;box-shadow:0 6px 15px #0000001a;transition:all .3s ease-in-out;cursor:pointer;min-width:120px}.main-content .box:hover{background:linear-gradient(135deg,#829805,#cddc39);transform:scale(1.05) rotate(-1deg);color:#fff;box-shadow:0 8px 20px #0003}.main-content .box:active{transform:scale(.97);box-shadow:0 4px 10px #0000001a}.admin-courses{display:flex;justify-content:center;flex-wrap:wrap;gap:1rem}.admin-courses .left .dashboard-content{display:flex;justify-content:space-around;gap:20px;flex-wrap:wrap;margin-top:40px;margin-left:5px}.admin-courses .right .course-form{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:100%;max-width:400px}.admin-courses .right .course-form h2{font-size:24px;color:#d5f603;margin-bottom:15px}.admin-courses .right .course-form form{text-align:left}.admin-courses .right .course-form form label{display:block;margin-bottom:5px;font-size:15px;color:#333}.admin-courses .right .course-form form input,.admin-courses .right .course-form form select{width:92%;padding:10px;margin-bottom:15px;border:1px solid #ccc;border-radius:5px;box-sizing:border-box}.users{padding:2rem;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.users h1{text-align:center;margin-bottom:1.5rem;color:#333}table{width:100%;border-collapse:collapse;box-shadow:0 0 10px #0000001a;background-color:#fff}thead{background-color:#4caf50;color:#fff}thead td{padding:12px;font-weight:700;text-transform:uppercase;font-size:.9rem}tbody td{padding:12px;text-align:center;border-top:1px solid #ddd}tbody tr:nth-child(2n){background-color:#f9f9f9}tbody tr:hover{background-color:#f1f1f1}.common-btn{background-color:#007bff;color:#fff;padding:8px 14px;border:none;border-radius:5px;cursor:pointer;transition:.3s ease;font-size:.85rem}.common-btn:hover{background-color:#0056b3}.chat-container{border:1px solid var(--color-border-strong);border-radius:var(--radius-lg);padding:clamp(1.25rem,4vw,1.85rem);width:100%;max-width:640px;margin:clamp(1.75rem,5vw,3rem) auto;background:var(--color-surface);box-shadow:var(--shadow-lg)}.chat-header{font-size:1.175rem;font-weight:800;margin-bottom:1rem;text-align:center;letter-spacing:-.03em;color:var(--color-text)}.chat-messages{max-height:min(340px,45vh);overflow-y:auto;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:.85rem;margin-bottom:1rem;background:var(--color-bg-strong)}.chat-message{margin-bottom:.72rem;font-size:.8925rem;color:var(--color-text-muted);line-height:1.5}.chat-message .username{font-weight:700;color:var(--color-text);margin-right:.35rem}.chat-input-group{display:flex;flex-wrap:wrap;gap:.65rem}.chat-input{flex:1 1 10rem;padding:.65rem .92rem!important;margin:0!important;border-radius:var(--radius-md)!important;border:1px solid var(--color-border-strong)!important}.chat-send-btn.common-btn{margin-top:0!important;flex-shrink:0}@media (max-width: 540px){.chat-input-group .common-btn{width:100%;justify-content:center}}:root{--ai-primary: #8a4fff;--ai-secondary: #00d2ff;--ai-bg: #f0f2f5;--user-bubble: #8a4fff;--ai-bubble: #ffffff;--text-dark: #1a1a1a;--text-muted: #666}.ai-page-wrapper{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 80px);background:var(--ai-bg);padding:20px;font-family:Inter,-apple-system,sans-serif}.ai-chat-card{width:100%;max-width:800px;height:600px;background:#fff;border-radius:20px;box-shadow:0 10px 30px #0000001a;display:flex;flex-direction:column;overflow:hidden;position:relative}.ai-header{padding:15px 25px;background:linear-gradient(135deg,var(--ai-primary),var(--ai-secondary));color:#fff;display:flex;align-items:center;gap:15px;z-index:10}.ai-status-icon{font-size:24px;background:#fff3;width:45px;height:45px;display:flex;align-items:center;justify-content:center;border-radius:12px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);flex-shrink:0}.ai-header-text h3{margin:0;font-size:18px;font-weight:600}.ai-header-text span{font-size:12px;opacity:.8}.ai-welcome{text-align:center;padding:40px 20px;color:var(--text-muted)}.welcome-icon{font-size:50px;margin-bottom:15px}.ai-welcome h2{color:var(--text-dark);font-size:24px;margin-bottom:10px}.qa-scroll-area{flex:1;overflow-y:auto;padding:25px;display:flex;flex-direction:column;gap:20px;background-image:radial-gradient(#8a4fff11 1px,transparent 1px);background-size:20px 20px}.qa-scroll-area::-webkit-scrollbar{width:6px}.qa-scroll-area::-webkit-scrollbar-thumb{background:#ddd;border-radius:10px}.message-pair{display:flex;flex-direction:column;gap:12px}.msg{max-width:80%;padding:12px 18px;font-size:15px;line-height:1.5;position:relative;word-wrap:break-word;word-break:break-word;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.user-bubble{align-self:flex-end;background:var(--user-bubble);color:#fff;border-radius:18px 18px 0;box-shadow:0 4px 15px #8a4fff33}.ai-bubble{align-self:flex-start;background:var(--ai-bubble);color:var(--text-dark);border-radius:18px 18px 18px 0;border:1px solid #eee;box-shadow:0 4px 15px #0000000d}.typing-indicator{display:flex;gap:4px;padding:5px 0}.typing-indicator span{width:8px;height:8px;background:#ccc;border-radius:50%;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.ai-input-wrapper{padding:20px 25px;background:#fff;border-top:1px solid #eee}.input-group{display:flex;gap:12px;align-items:center;background:var(--ai-bg);padding:8px 8px 8px 15px;border-radius:15px;transition:all .3s}.input-group:focus-within{background:#fff;box-shadow:0 0 0 2px var(--ai-primary)}.input-group input{flex:1;border:none;background:transparent;padding:10px 0;font-size:15px;outline:none;color:var(--text-dark)}.send-btn{background:var(--ai-primary);color:#fff;border:none;width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;flex-shrink:0}.send-btn:hover:not(:disabled){transform:scale(1.05);background:var(--ai-secondary)}.send-btn:disabled{opacity:.5;cursor:not-allowed}@media (max-width: 600px){.ai-page-wrapper{padding:0;min-height:calc(100vh - 60px)}.ai-chat-card{height:calc(100vh - 60px);border-radius:0}.msg{max-width:90%}}.quiz-welcome-wrapper,.quiz-result-wrapper,.quiz-active-wrapper{min-height:calc(100vh - 80px);padding:40px 20px;display:flex;flex-direction:column;align-items:center;background-color:#f8fafc;font-family:Inter,sans-serif}.quiz-intro-card{background:#fff;padding:50px;border-radius:24px;text-align:center;max-width:500px;box-shadow:0 20px 40px #0000000d;animation:fadeInScale .5s ease-out}@keyframes fadeInScale{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.quiz-icon{font-size:60px;margin-bottom:20px}.quiz-intro-card h1{font-size:28px;color:#1e293b;margin-bottom:15px}.quiz-intro-card p{color:#64748b;line-height:1.6;margin-bottom:30px}.quiz-rules{display:flex;justify-content:center;gap:15px;margin-bottom:40px;flex-wrap:wrap}.quiz-rules span{background:#f1f5f9;padding:8px 16px;border-radius:99px;font-size:13px;font-weight:600;color:#475569}.start-quiz-btn{width:100%;padding:16px;background:#8a4fff;color:#fff;border:none;border-radius:12px;font-size:18px;font-weight:700;cursor:pointer;transition:all .2s}.start-quiz-btn:hover{background:#7135e6;transform:translateY(-2px);box-shadow:0 10px 20px #8a4fff33}.quiz-progress-bar{width:100%;max-width:700px;height:8px;background:#e2e8f0;border-radius:4px;margin-bottom:40px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#8a4fff,#00d2ff);transition:width .4s cubic-bezier(.4,0,.2,1)}.question-card{width:100%;max-width:700px;background:#fff;padding:40px;border-radius:24px;box-shadow:0 10px 30px #0000000a}.q-count{font-size:12px;text-transform:uppercase;color:#94a3b8;font-weight:800;letter-spacing:1px}.question-text{font-size:24px;color:#1e293b;margin:20px 0 30px;line-height:1.4}.options-grid{display:flex;flex-direction:column;gap:12px}.option-item{display:flex;align-items:center;gap:15px;padding:16px 20px;background:#f8fafc;border:2px solid #f1f5f9;border-radius:16px;cursor:pointer;transition:all .2s}.option-item:hover{background:#fff;border-color:#cbd5e1}.option-item.selected{background:#f0f7ff;border-color:#38bdf8;box-shadow:0 4px 12px #38bdf81a}.option-letter{width:30px;height:30px;background:#e2e8f0;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#64748b;transition:all .2s}.selected .option-letter{background:#38bdf8;color:#fff}.option-content{font-size:16px;color:#334155;font-weight:500}.quiz-footer{margin-top:40px;display:flex;justify-content:flex-end}.next-btn{padding:14px 40px;background:#1e293b;color:#fff;border:none;border-radius:12px;font-weight:700;cursor:pointer;transition:all .2s}.next-btn:hover:not(:disabled){background:#0f172a;transform:translateY(-2px)}.next-btn:disabled{opacity:.3;cursor:not-allowed}.result-card{background:#fff;padding:50px;border-radius:32px;text-align:center;max-width:500px;box-shadow:0 25px 50px -12px #0000001a}.result-header{font-size:24px;font-weight:800;margin-bottom:30px;color:#1e293b}.score-circle{width:150px;height:150px;background:linear-gradient(135deg,#8a4fff,#00d2ff);border-radius:50%;margin:0 auto 30px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;box-shadow:0 15px 30px #8a4fff4d}.score-num{font-size:48px;font-weight:900;line-height:1}.score-total{font-size:18px;opacity:.8}.result-card h2{font-size:24px;margin-bottom:10px}.result-card p{color:#64748b;margin-bottom:40px}.result-actions{display:flex;gap:15px}.retry-btn{flex:1;padding:14px;background:#8a4fff;color:#fff;border:none;border-radius:12px;font-weight:700;cursor:pointer}.back-btn{flex:1;padding:14px;background:#f1f5f9;color:#475569;border:none;border-radius:12px;font-weight:700;cursor:pointer}@media (max-width: 600px){.quiz-intro-card,.question-card,.result-card{padding:30px 20px}.result-actions{flex-direction:column}}