*{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#f3f4f6;--color-surface:#fff;--color-primary:#6366f1;--color-primary-soft:#e0e7ff;--color-accent:#14b8a6;--color-text-main:#111827;--color-text-muted:#6b7280;--color-border:#e5e7eb;--color-danger:#ef4444;--space-xs:.25rem;--space-sm:.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--space-3xl:4rem;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--font-size-4xl:2.25rem;--transition-fast:.15s cubic-bezier(.4,0,.2,1);--transition-base:.3s cubic-bezier(.4,0,.2,1);--transition-slow:.5s cubic-bezier(.4,0,.2,1)}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text-main);line-height:1.6;overflow-x:hidden}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes floatHover{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}.page-container{width:100%;max-width:100%}.navbar{z-index:40;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--color-border);padding:var(--space-md)var(--space-xl);justify-content:space-between;align-items:center;gap:var(--space-lg);background:#ffffffd9;animation:.4s ease-out fadeInDown;display:flex;position:sticky;top:0}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.navbar-left,.navbar-right{align-items:center;gap:var(--space-md);display:flex}.navbar-left{gap:var(--space-sm)}.navbar-logo{background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:#fff;width:2.5rem;height:2.5rem;font-weight:700;font-size:var(--font-size-lg);cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast);border-radius:.5rem;justify-content:center;align-items:center;display:flex;box-shadow:0 2px 8px #6366f126}.navbar-logo:hover{transform:scale(1.05);box-shadow:0 4px 12px #6366f140}.navbar-title{font-weight:600;font-size:var(--font-size-lg);color:var(--color-text-main)}a{color:inherit;text-decoration:none}.btn{padding:var(--space-sm)var(--space-lg);font-size:var(--font-size-base);cursor:pointer;transition:all var(--transition-base);white-space:nowrap;justify-content:center;align-items:center;gap:var(--space-sm);border:none;border-radius:.5rem;font-weight:500;display:inline-flex}.btn-primary{background-color:var(--color-primary);color:#fff;box-shadow:0 4px 12px #6366f140}.btn-primary:hover{background-color:#4f46e5;transform:translateY(-2px);box-shadow:0 6px 16px #6366f159}.btn-primary:active{transform:translateY(0)}.btn-secondary{background-color:var(--color-surface);color:var(--color-primary);border:1.5px solid var(--color-primary-soft);box-shadow:0 2px 8px #6366f114}.btn-secondary:hover{background-color:var(--color-primary-soft);border-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 4px 12px #6366f126}.btn-secondary:active{transform:translateY(0)}.btn-ghost{color:var(--color-text-main);background-color:#0000;border:none}.btn-ghost:hover{color:var(--color-primary);transform:translateY(-1px)}.hero{gap:var(--space-3xl);padding:var(--space-3xl)var(--space-xl);flex-direction:row;grid-template-columns:1fr 1fr;justify-content:space-between;align-items:center;max-width:1400px;min-height:100vh;margin:0 auto;display:flex}@media (max-width:768px){.hero{padding:var(--space-2xl)var(--space-lg);gap:var(--space-2xl);grid-template-columns:1fr;min-height:auto}}.hero-text{animation:.6s ease-out fadeInUp}.hero-kicker{align-items:center;gap:var(--space-sm);background-color:var(--color-primary-soft);color:var(--color-primary);padding:var(--space-sm)var(--space-lg);font-size:var(--font-size-sm);margin-bottom:var(--space-lg);border-radius:9999px;font-weight:600;animation:.5s ease-out .1s both scaleIn;display:inline-flex}h1{font-size:var(--font-size-4xl);color:var(--color-text-main);margin-bottom:var(--space-lg);font-weight:700;line-height:1.2;animation:.6s ease-out .15s both fadeInUp}@media (max-width:768px){h1{font-size:var(--font-size-3xl)}}.hero-text>p:first-of-type{font-size:var(--font-size-lg);color:var(--color-text-muted);margin-bottom:var(--space-2xl);max-width:500px;line-height:1.7;animation:.6s ease-out .2s both fadeInUp}.hero-actions{gap:var(--space-md);margin-bottom:var(--space-lg);flex-wrap:wrap;animation:.6s ease-out .25s both fadeInUp;display:flex}@media (max-width:640px){.hero-actions{flex-direction:column}.hero-actions .btn{width:100%}}.text-muted{color:var(--color-text-muted);animation:.6s ease-out .3s both fadeInUp}.hero-preview{gap:var(--space-lg);flex-direction:column;animation:.7s ease-out .2s both slideInRight;display:flex}.preview-card{background:var(--color-surface);border:1px solid var(--color-border);padding:var(--space-xl);font-size:var(--font-size-base);color:var(--color-text-muted);transition:all var(--transition-base);border-radius:.75rem;line-height:1.7;position:relative;overflow:hidden;box-shadow:0 2px 8px #0000000a}.preview-card:before{content:"";background:linear-gradient(180deg,var(--color-primary),var(--color-accent));opacity:0;width:3px;height:100%;transition:opacity var(--transition-base);position:absolute;top:0;left:0}.preview-card:hover{border-color:var(--color-primary-soft);background:linear-gradient(135deg,var(--color-surface),var(--color-primary-soft));transform:translateY(-4px);box-shadow:0 8px 20px #6366f11f}.preview-card:hover:before{opacity:1}.preview-card-strong{color:var(--color-primary);font-weight:600}.preview-card:first-child{animation:.6s ease-out .3s both fadeInUp}.preview-card:nth-child(2){animation:.6s ease-out .35s both fadeInUp}.preview-card:nth-child(3){animation:.6s ease-out .4s both fadeInUp}@media (max-width:768px){.hero-preview{animation:slideInRight}.preview-card{animation:.6s ease-out fadeInUp!important}}.section-animate{animation:.6s ease-out fadeIn}.bg-light{background-color:var(--color-bg)}.bg-white{background-color:var(--color-surface)}.bg-primary-soft{background-color:var(--color-primary-soft)}.card-hover{transform:translateY(0)}.card-hover:hover{transform:translateY(-4px)}.feature-card-0{animation:.6s ease-out both fadeInUp}.feature-card-1{animation:.6s ease-out .1s both fadeInUp}.feature-card-2{animation:.6s ease-out .2s both fadeInUp}.feature-card-3{animation:.6s ease-out .3s both fadeInUp}.feature-card-4{animation:.6s ease-out .4s both fadeInUp}.feature-card-5{animation:.6s ease-out .5s both fadeInUp}.testimonial-card-0{animation:.6s ease-out both fadeInUp}.testimonial-card-1{animation:.6s ease-out .1s both fadeInUp}.testimonial-card-2{animation:.6s ease-out .2s both fadeInUp}.steps-card-0{animation:.6s ease-out both fadeInUp}.steps-card-1{animation:.6s ease-out .1s both fadeInUp}.steps-card-2{animation:.6s ease-out .2s both fadeInUp}.steps-card-3{animation:.6s ease-out .3s both fadeInUp}.heading-animate{animation:.6s ease-out .1s both fadeInUp}.subtitle-animate{animation:.6s ease-out .15s both fadeInUp}.kicker-animate{animation:.5s ease-out 50ms both scaleIn}.cta-section-animate,.faq-item{animation:.6s ease-out fadeInUp}.animation-open{animation:.3s ease-out forwards slideDown}@keyframes slideDown{0%{opacity:0;max-height:0;transform:translateY(-10px)}to{opacity:1;max-height:500px;transform:translateY(0)}}.icon-animate{animation:3s ease-in-out infinite floatHover}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}
.page-container{max-width:1100px;margin:0 auto;padding:2rem 1.5rem 3rem}.navbar{background-color:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:50;justify-content:space-between;align-items:center;padding:1rem 1.5rem;display:flex;position:sticky;top:0}.navbar-left{align-items:center;gap:.5rem;display:flex}.navbar-logo{background:radial-gradient(circle at 30% 30%,var(--color-primary),#4f46e5);color:#fff;border-radius:999px;justify-content:center;align-items:center;width:32px;height:32px;font-size:.9rem;font-weight:700;display:flex}.navbar-title{font-size:1.1rem;font-weight:600}.navbar-right{align-items:center;gap:.75rem;display:flex}.btn{border:none;border-radius:999px;justify-content:center;align-items:center;gap:.35rem;padding:.6rem 1.4rem;font-size:.95rem;font-weight:500;text-decoration:none;transition:background-color .15s,box-shadow .15s,transform .1s;display:inline-flex}.btn-primary{background-color:var(--color-primary);color:#fff;box-shadow:0 10px 25px #6366f14d}.btn-primary:hover{background-color:#4f46e5;transform:translateY(-1px);box-shadow:0 12px 28px #4f46e566}.btn-secondary{background-color:var(--color-primary-soft);color:var(--color-primary)}.btn-secondary:hover{background-color:#c7d2fe}.btn-ghost{color:var(--color-text-muted);background-color:#0000}.btn-ghost:hover{background-color:#94a3b81f}.card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:1rem;padding:1.25rem 1.4rem;box-shadow:0 10px 30px #0f172a0a}.card-header{justify-content:space-between;align-items:flex-start;gap:.5rem;margin-bottom:.5rem;display:flex}.card-title{font-size:1rem;font-weight:600}.card-subtitle{color:var(--color-text-muted);font-size:.85rem}.card-body{color:var(--color-text-main);font-size:.9rem}.progress{flex-direction:column;gap:.2rem;display:flex}.progress-label{color:var(--color-text-muted);font-size:.75rem}.progress-track{background-color:var(--color-border);border-radius:999px;width:100%;height:7px;overflow:hidden}.progress-fill{background:linear-gradient(90deg,var(--color-accent),var(--color-primary));border-radius:999px;height:100%}.grid{gap:1.25rem;display:grid}@media (min-width:768px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@keyframes lm-spin{to{transform:rotate(360deg)}}
.hero{gap:2rem;margin-top:2rem;display:grid}.hero-text h1{margin-bottom:.75rem;font-size:2.2rem;line-height:1.15}.hero-text p{color:var(--color-text-muted);max-width:32rem;margin-bottom:1.5rem;font-size:1rem}.hero-actions{flex-wrap:wrap;gap:.75rem;margin-bottom:1.5rem;display:flex}.hero-kicker{background-color:var(--color-primary-soft);color:var(--color-primary);border-radius:999px;align-items:center;gap:.4rem;margin-bottom:.75rem;padding:.25rem .6rem;font-size:.8rem;font-weight:500;display:inline-flex}.hero-preview{gap:.8rem;display:grid}.preview-card{background-color:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-muted);border-radius:1rem;padding:.8rem 1rem;font-size:.9rem;box-shadow:0 8px 20px #0f172a08}.preview-card-strong{color:var(--color-primary);font-weight:600}@media (min-width:900px){.hero{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:center}}
.upload-page h1{margin-bottom:.5rem;font-size:1.6rem}.upload-page p{color:var(--color-text-muted);max-width:32rem;margin-bottom:1.5rem}.upload-form{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:1rem;flex-direction:column;gap:1rem;max-width:720px;padding:1.5rem;display:flex;box-shadow:0 10px 30px #0f172a0a}.upload-form label{color:var(--color-text-main);flex-direction:column;gap:.35rem;font-size:.9rem;display:flex}.upload-form input,.upload-form select,.upload-form textarea{border:1px solid var(--color-border);background-color:#f9fafb;border-radius:.75rem;outline:none;padding:.55rem .7rem;font-size:.9rem}.upload-form textarea{resize:vertical}.upload-form input:focus,.upload-form select:focus,.upload-form textarea:focus{border-color:var(--color-primary);background-color:#fff;box-shadow:0 0 0 1px #6366f140}.upload-form .hint{color:var(--color-text-muted);font-size:.8rem}.upload-actions{justify-content:flex-end;display:flex}
.section{margin-top:2rem}.section h2{margin-bottom:.4rem;font-size:1.3rem}.section>p{color:var(--color-text-muted);margin-bottom:1rem;font-size:.9rem}.section .grid-cards{gap:1.2rem;display:grid}@media (min-width:768px){.section .grid-cards{grid-template-columns:repeat(3,minmax(0,1fr))}}
.section .list{flex-direction:column;gap:.6rem;margin-top:.5rem;display:flex}.topic-item{text-align:left;border:1px solid var(--color-border);background-color:var(--color-surface);border-radius:.75rem;justify-content:space-between;align-items:center;width:100%;padding:.6rem .8rem;font-size:.9rem;transition:background-color .15s,box-shadow .15s,transform .1s;display:flex}.topic-item:after{content:"→";color:var(--color-text-muted);font-size:.85rem}.topic-item:hover{background-color:#f9fafb;transform:translateY(-1px);box-shadow:0 10px 20px #0f172a0a}.custom-topic-form{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:1rem;flex-direction:column;gap:.9rem;max-width:520px;padding:1.25rem;display:flex;box-shadow:0 10px 30px #0f172a0a}.custom-topic-form label{flex-direction:column;gap:.3rem;font-size:.9rem;display:flex}.custom-topic-form input,.custom-topic-form select{border:1px solid var(--color-border);background-color:#f9fafb;border-radius:.75rem;padding:.5rem .7rem}.custom-topic-form input:focus,.custom-topic-form select:focus{border-color:var(--color-primary);background-color:#fff;outline:none;box-shadow:0 0 0 1px #6366f140}
.course-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.5rem;margin-top:1.5rem;margin-bottom:1.25rem;display:flex}.course-header h1{margin:0;font-size:1.6rem}.course-category{margin-top:.2rem;font-size:.9rem}.course-progress{flex-direction:column;gap:.35rem;min-width:220px;display:flex}.course-progress-label{color:var(--color-text-muted);font-size:.85rem}.course-tabs{margin-top:1rem}.tabs{border-bottom:1px solid var(--color-border);gap:.75rem;margin-bottom:1rem;display:flex;overflow-x:auto}.tab-button{color:var(--color-text-muted);white-space:nowrap;background:0 0;border:none;padding:.6rem .2rem;font-size:.9rem;position:relative}.tab-button-active{color:var(--color-primary);font-weight:500}.tab-button-active:after{content:"";background:linear-gradient(90deg,var(--color-accent),var(--color-primary));border-radius:999px;width:100%;height:2px;position:absolute;bottom:-1px;left:0}.course-content{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:1rem;padding:1.2rem 1.3rem;box-shadow:0 10px 30px #0f172a0a}.module-list{gap:.9rem;display:grid}.module-card{border:1px solid var(--color-border);background-color:#f9fafb;border-radius:.9rem;padding:.9rem 1rem}.module-card-header{justify-content:space-between;gap:.5rem;margin-bottom:.4rem;display:flex}.module-title{font-size:.98rem;font-weight:600}.module-pill{background-color:var(--color-primary-soft);color:var(--color-primary);border-radius:999px;padding:.1rem .5rem;font-size:.75rem}.module-summary{color:var(--color-text-muted);margin-bottom:.3rem;font-size:.85rem}.module-outcomes{color:var(--color-text-muted);margin:0;padding-left:1.1rem;font-size:.8rem}.lesson-layout{gap:1rem;display:grid}@media (min-width:900px){.lesson-layout{grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr)}}.lesson-sidebar{border-right:1px solid var(--color-border);padding-right:1rem}.lesson-module-item{text-align:left;background-color:#0000;border:1px solid #0000;border-radius:.7rem;justify-content:space-between;gap:.5rem;width:100%;padding:.5rem .7rem;font-size:.9rem;display:flex}.lesson-module-item-active{background-color:var(--color-primary-soft);border-color:var(--color-primary);color:var(--color-primary)}.lesson-module-title{font-size:.9rem}.lesson-main-title{margin-bottom:.3rem;font-size:1.1rem}.lesson-content{white-space:pre-wrap;font-size:.9rem;line-height:1.6}.lesson-meta{flex-direction:column;gap:.5rem;margin-top:.8rem;display:flex}.lesson-meta h4{margin:0;font-size:.9rem}.lesson-actions{flex-wrap:wrap;gap:.5rem;margin-top:.9rem;display:flex}.flashcard-shell{flex-direction:column;gap:.9rem;display:flex}.flashcard-box{border:1px solid var(--color-border);background-color:#f9fafb;border-radius:1rem;flex-direction:column;justify-content:center;min-height:130px;padding:1rem 1.2rem;display:flex}.flashcard-label{color:var(--color-text-muted);margin-bottom:.4rem;font-size:.8rem}.flashcard-front,.flashcard-back{font-size:.95rem}.flashcard-back{margin-top:.5rem}.flashcard-controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;display:flex}.flashcard-index{color:var(--color-text-muted);font-size:.85rem}.quiz-shell{flex-direction:column;gap:1rem;display:flex}.quiz-question{border:1px solid var(--color-border);background-color:#f9fafb;border-radius:.9rem;padding:.9rem 1rem}.quiz-question-title{margin-bottom:.5rem;font-size:.95rem}.quiz-options{flex-direction:column;gap:.35rem;display:flex}.quiz-option{align-items:center;gap:.45rem;font-size:.9rem;display:flex}.quiz-result-message{margin-top:.5rem;font-size:.9rem}.quiz-result-ok{color:var(--color-accent)}.quiz-result-bad{color:var(--color-danger)}
