@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap";:root{--color-primary:#6c63ff;--color-primary-light:#8b85ff;--color-primary-dark:#4a43cc;--color-primary-glow:#6c63ff33;--color-accent:#00d4aa;--color-accent-light:#00f0c0;--color-bg:#0f0f1a;--color-bg-secondary:#1a1a2e;--color-bg-elevated:#242438;--color-bg-card:#1e1e32;--color-text:#e8e8f0;--color-text-secondary:#9090b0;--color-text-muted:#5a5a7a;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--color-border:#ffffff14;--color-border-strong:#ffffff26;--color-navbar-bg:#0f0f1ae6;--font-primary:"Plus Jakarta Sans", sans-serif;--font-mono:"JetBrains Mono", monospace;--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--text-5xl:3rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 4px 20px #0006;--shadow-lg:0 8px 40px #00000080;--shadow-glow:0 0 30px var(--color-primary-glow);--transition:all .2s ease;--sidebar-width:260px}[data-theme=light]{--color-primary:#5a52d5;--color-primary-light:#7a72fa;--color-primary-dark:#3a32b5;--color-primary-glow:#5a52d526;--color-accent:#00b894;--color-accent-light:#00d6ab;--color-bg:#f4f4f9;--color-bg-secondary:#fff;--color-bg-elevated:#f9f9fc;--color-bg-card:#fff;--color-text:#1e1e2d;--color-text-secondary:#5a5a7a;--color-text-muted:#9090b0;--color-border:#00000014;--color-border-strong:#00000026;--color-navbar-bg:#ffffffe6;--shadow-sm:0 2px 8px #0000000d;--shadow-md:0 4px 20px #0000001a;--shadow-lg:0 8px 40px #00000026}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-primary);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}ul{list-style:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-bg-elevated);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}h1{font-size:var(--text-5xl)}h2{font-size:var(--text-4xl)}h3{font-size:var(--text-2xl)}p{color:var(--color-text-secondary);line-height:1.7}.gradient-text{background:linear-gradient(135deg, var(--color-primary-light), var(--color-accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.container{max-width:1200px;padding:0 var(--space-6);margin:0 auto}.section{padding:var(--space-20) 0}.section-title{text-align:center;margin-bottom:var(--space-4)}.section-subtitle{text-align:center;color:var(--color-text-secondary);max-width:600px;margin:0 auto var(--space-12)}.btn{align-items:center;gap:var(--space-2);border-radius:var(--radius-md);font-weight:600;font-size:var(--text-sm);transition:var(--transition);white-space:nowrap;border:none;padding:.75rem 1.5rem;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn--primary{background:var(--color-primary);color:#fff;box-shadow:0 4px 15px var(--color-primary-glow)}.btn--primary:hover:not(:disabled){background:var(--color-primary-light);box-shadow:0 6px 25px var(--color-primary-glow);transform:translateY(-2px)}.btn--secondary{background:var(--color-bg-elevated);color:var(--color-text);border:1px solid var(--color-border-strong)}.btn--secondary:hover:not(:disabled){background:var(--color-bg-card);transform:translateY(-1px)}.btn--ghost{color:var(--color-text-secondary);border:1px solid var(--color-border);background:0 0}.btn--ghost:hover:not(:disabled){color:var(--color-text);border-color:var(--color-border-strong)}.btn--danger{background:var(--color-error);color:#fff}.btn--danger:hover:not(:disabled){background:#dc2626;transform:translateY(-1px)}.btn--accent{background:var(--color-accent);color:#0f0f1a;font-weight:700}.btn--accent:hover:not(:disabled){background:var(--color-accent-light);transform:translateY(-2px)}.btn--sm{font-size:var(--text-xs);padding:.5rem 1rem}.btn--lg{font-size:var(--text-base);padding:1rem 2rem}.btn--full{justify-content:center;width:100%}.theme-toggle{border:1px solid var(--color-border);background:var(--color-bg-elevated);width:40px;height:40px;color:var(--color-text-secondary);transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;display:flex}.theme-toggle:hover{color:var(--color-text);border-color:var(--color-primary);background:var(--color-bg-card);box-shadow:0 4px 12px var(--color-primary-glow);transform:translateY(-2px)}.card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);transition:var(--transition)}.card--hover:hover{border-color:var(--color-primary);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.card--glass{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff08;border:1px solid #ffffff14}.input-group{gap:var(--space-2);flex-direction:column;display:flex}.input-label{font-size:var(--text-sm);color:var(--color-text);font-weight:600}.input-field{background:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);font-size:var(--text-base);transition:var(--transition);width:100%;padding:.75rem 1rem}.input-field:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-glow);outline:none}.input-field::placeholder{color:var(--color-text-muted)}.input-field--error{border-color:var(--color-error)}.input-error-msg{font-size:var(--text-xs);color:var(--color-error)}.badge{border-radius:var(--radius-full);font-size:var(--text-xs);align-items:center;gap:4px;padding:.25rem .75rem;font-weight:600;display:inline-flex}.badge--primary{background:var(--color-primary-glow);color:var(--color-primary-light)}.badge--success{color:#10b981;background:#10b98126}.badge--warning{color:#f59e0b;background:#f59e0b26}.badge--error{color:#ef4444;background:#ef444426}.badge--info{color:#3b82f6;background:#3b82f626}.badge--accent{color:var(--color-accent);background:#00d4aa26}.badge--neutral{background:var(--color-bg-elevated);color:var(--color-text-secondary)}.progress-bar-wrap{background:var(--color-bg-elevated);border-radius:var(--radius-full);overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg, var(--color-primary), var(--color-accent));border-radius:var(--radius-full);height:100%;transition:width .8s}.spinner{border:3px solid var(--color-bg-elevated);border-top-color:var(--color-primary);border-radius:50%;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg, var(--color-bg-elevated) 25%, var(--color-bg-card) 50%, var(--color-bg-elevated) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes fadeSlideUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}.animate-fade-up{animation:.5s forwards fadeSlideUp}.animate-fade-in{animation:.4s forwards fadeIn}.grid-2{gap:var(--space-6);grid-template-columns:repeat(2,1fr);display:grid}.grid-3{gap:var(--space-6);grid-template-columns:repeat(3,1fr);display:grid}.grid-4{gap:var(--space-6);grid-template-columns:repeat(4,1fr);display:grid}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;padding:var(--space-4);background:#000000b3;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal-box{background:var(--color-bg-secondary);border:1px solid var(--color-border-strong);border-radius:var(--radius-xl);padding:var(--space-8);width:100%;max-width:520px;animation:.3s fadeSlideUp}.modal-header{margin-bottom:var(--space-6);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:var(--text-xl);font-weight:700}.modal-close{color:var(--color-text-secondary);transition:var(--transition);background:0 0;border:none;font-size:1.5rem}.modal-close:hover{color:var(--color-text)}.dashboard-layout{min-height:100vh;display:flex}.dashboard-main{margin-left:var(--sidebar-width);padding:var(--space-8);flex:1;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--color-bg-secondary);border-right:1px solid var(--color-border);height:100vh;padding:var(--space-6);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;left:0;overflow-y:auto}.sidebar__logo{align-items:center;gap:var(--space-3);margin-bottom:var(--space-8);font-size:var(--text-xl);font-weight:800;display:flex}.sidebar__logo-icon{color:var(--color-primary);font-size:1.5rem}.sidebar__nav{gap:var(--space-1);flex-direction:column;flex:1;display:flex}.sidebar__link{align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);color:var(--color-text-secondary);font-size:var(--text-sm);transition:var(--transition);font-weight:500;display:flex}.sidebar__link:hover{background:var(--color-bg-elevated);color:var(--color-text)}.sidebar__link.active{background:var(--color-primary-glow);color:var(--color-primary-light)}.sidebar__link svg{flex-shrink:0;font-size:1.1rem}.sidebar__section-label{font-size:var(--text-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.1em;padding:var(--space-3) var(--space-4) var(--space-1);margin-top:var(--space-4);font-weight:700}.sidebar__footer{padding-top:var(--space-4);border-top:1px solid var(--color-border);margin-top:auto}.sidebar__user{align-items:center;gap:var(--space-3);padding:var(--space-3);border-radius:var(--radius-md);display:flex}.sidebar__user-name{font-size:var(--text-sm);font-weight:600}.sidebar__user-role{font-size:var(--text-xs);color:var(--color-text-secondary)}.navbar{z-index:100;padding:var(--space-4) var(--space-8);background:var(--color-navbar-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.navbar__logo{align-items:center;gap:var(--space-2);font-size:var(--text-xl);font-weight:800;display:flex}.navbar__logo-icon{color:var(--color-primary)}.navbar__links{align-items:center;gap:var(--space-8);display:flex}.navbar__link{font-size:var(--text-sm);color:var(--color-text-secondary);transition:var(--transition);font-weight:500}.navbar__link:hover,.navbar__link.active{color:var(--color-text)}.navbar__actions{align-items:center;gap:var(--space-3);display:flex}.auth-page{background:var(--color-bg);min-height:100vh;padding:var(--space-6);justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.auth-page:before{content:"";background:radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);pointer-events:none;width:500px;height:500px;position:absolute;top:-200px;right:-200px}.auth-card{background:var(--color-bg-secondary);border:1px solid var(--color-border-strong);border-radius:var(--radius-xl);padding:var(--space-10);z-index:1;width:100%;max-width:480px;position:relative}.auth-card__header{text-align:center;margin-bottom:var(--space-8)}.auth-card__logo{justify-content:center;align-items:center;gap:var(--space-2);font-size:var(--text-xl);margin-bottom:var(--space-4);font-weight:800;display:flex}.auth-card__logo svg{color:var(--color-primary)}.auth-card__title{font-size:var(--text-2xl);margin-bottom:var(--space-2)}.auth-card__subtitle{color:var(--color-text-secondary);font-size:var(--text-sm)}.auth-form{gap:var(--space-5);flex-direction:column;display:flex}.auth-form__divider{text-align:center;color:var(--color-text-muted);font-size:var(--text-sm);position:relative}.auth-form__divider:before,.auth-form__divider:after{content:"";background:var(--color-border);width:40%;height:1px;position:absolute;top:50%}.auth-form__divider:before{left:0}.auth-form__divider:after{right:0}.auth-footer{text-align:center;margin-top:var(--space-6);font-size:var(--text-sm);color:var(--color-text-secondary)}.auth-footer a{color:var(--color-primary-light);font-weight:600}.page-header{margin-bottom:var(--space-8)}.page-header__title{font-size:var(--text-3xl);margin-bottom:var(--space-2);font-weight:800}.page-header__subtitle{color:var(--color-text-secondary)}.empty-state{text-align:center;padding:var(--space-16) var(--space-8)}.empty-state__icon{margin-bottom:var(--space-4);color:var(--color-text-muted);font-size:3rem}.empty-state__title{font-size:var(--text-xl);margin-bottom:var(--space-3)}.empty-state__text{color:var(--color-text-secondary);margin-bottom:var(--space-6)}.table-wrap{border-radius:var(--radius-lg);border:1px solid var(--color-border);overflow-x:auto}.table{border-collapse:collapse;width:100%}.table th{padding:var(--space-4) var(--space-5);background:var(--color-bg-elevated);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-secondary);text-align:left;font-weight:700}.table td{padding:var(--space-4) var(--space-5);border-top:1px solid var(--color-border);font-size:var(--text-sm);vertical-align:middle}.table tr:hover td{background:#ffffff05}.chat-page{gap:0;height:calc(100vh - 64px);display:flex}.chat-sidebar{border-right:1px solid var(--color-border);background:var(--color-bg-secondary);flex-direction:column;width:280px;display:flex}.chat-main{flex-direction:column;flex:1;display:flex}.chat-window{padding:var(--space-6);gap:var(--space-4);flex-direction:column;flex:1;display:flex;overflow-y:auto}.chat-bubble{gap:var(--space-3);max-width:80%;display:flex}.chat-bubble--user{flex-direction:row-reverse;align-self:flex-end}.chat-bubble__avatar{width:36px;height:36px;font-size:var(--text-sm);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex}.chat-bubble__avatar--ai{background:var(--color-primary-glow);color:var(--color-primary-light)}.chat-bubble__avatar--user{background:var(--color-accent);color:#0f0f1a}.chat-bubble__content{padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);font-size:var(--text-sm);line-height:1.6}.chat-bubble--ai .chat-bubble__content{background:var(--color-bg-elevated);border:1px solid var(--color-border);border-bottom-left-radius:4px}.chat-bubble--user .chat-bubble__content{background:var(--color-primary);color:#fff;border-bottom-right-radius:4px}.chat-input-area{padding:var(--space-4) var(--space-6);border-top:1px solid var(--color-border);gap:var(--space-3);align-items:flex-end;display:flex}.chat-input{padding:var(--space-3) var(--space-4);background:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);color:var(--color-text);resize:none;font-family:inherit;font-size:var(--text-sm);max-height:120px;transition:var(--transition);flex:1}.chat-input:focus{border-color:var(--color-primary);outline:none}.roadmap-timeline{gap:var(--space-4);flex-direction:column;display:flex}.roadmap-step{gap:var(--space-5);padding:var(--space-6);background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);transition:var(--transition);display:flex}.roadmap-step:hover{border-color:var(--color-primary-glow)}.roadmap-step--completed{background:#10b98108;border-color:#10b9814d}.roadmap-step__number{background:var(--color-bg-elevated);border:2px solid var(--color-border);width:44px;height:44px;font-weight:700;font-size:var(--text-sm);color:var(--color-text-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.roadmap-step--completed .roadmap-step__number{color:#10b981;background:#10b98126;border-color:#10b981}.roadmap-step__body{flex:1}.roadmap-step__title{font-size:var(--text-base);margin-bottom:var(--space-1);font-weight:700}.roadmap-step__desc{font-size:var(--text-sm);color:var(--color-text-secondary);margin-bottom:var(--space-3)}.roadmap-step__meta{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.roadmap-step__checkbox{align-items:center;gap:var(--space-2);cursor:pointer;font-size:var(--text-sm);color:var(--color-text-secondary);margin-left:auto;display:flex}.roadmap-step__checkbox input{width:18px;height:18px;accent-color:var(--color-success);cursor:pointer}.stat-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);align-items:flex-start;gap:var(--space-4);display:flex}.stat-card__icon{border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.4rem;display:flex}.stat-card__value{font-size:var(--text-3xl);margin-bottom:var(--space-1);font-weight:800;line-height:1}.stat-card__label{font-size:var(--text-sm);color:var(--color-text-secondary)}@media (width<=1024px){.dashboard-main{padding:var(--space-4);margin-left:0}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}}@media (width<=768px){h1{font-size:var(--text-4xl)}h2{font-size:var(--text-3xl)}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.navbar{padding:var(--space-4)}.navbar__links,.chat-sidebar{display:none}}@media (width<=480px){.auth-card{padding:var(--space-6)}}.lesson-content{color:var(--color-text);line-height:1.8}.lesson-content h2,.lesson-content h3{margin-top:var(--space-6);margin-bottom:var(--space-3)}.lesson-content p{margin-bottom:var(--space-4)}.lesson-content pre{background:var(--color-bg-elevated);padding:var(--space-4);border-radius:var(--radius-md);margin:var(--space-4) 0;border:1px solid var(--color-border);overflow-x:auto}.lesson-content code{font-family:var(--font-mono);color:var(--color-accent-light);font-size:.9em}.quiz-option{text-align:left;width:100%;padding:var(--space-4);margin-bottom:var(--space-3);border:2px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-elevated);color:var(--color-text);font-size:var(--text-base);transition:var(--transition)}.quiz-option:hover:not(:disabled){border-color:var(--color-primary);background:var(--color-bg-card)}.quiz-option--selected{border-color:var(--color-primary);background:var(--color-primary-glow)}.quiz-option--correct{border-color:var(--color-success);background:#10b9811a}.quiz-option--wrong{border-color:var(--color-error);background:#ef44441a}.quiz-feedback{padding:var(--space-4);border-radius:var(--radius-md);margin-top:var(--space-4);font-size:var(--text-sm);animation:.3s fadeIn}.quiz-feedback--success{color:var(--color-success);background:#10b9811a;border:1px solid #10b98133}.quiz-feedback--error{color:var(--color-error);background:#ef44441a;border:1px solid #ef444433}