:root{--primary: #2563eb;--primary-light: #3b82f6;--primary-dark: #1d4ed8;--primary-bg: #eff6ff;--secondary: #7c3aed;--bg: #ffffff;--bg-alt: #f8fafc;--bg-card: #ffffff;--text: #1e293b;--text-light: #64748b;--text-lighter: #94a3b8;--border: #e2e8f0;--border-light: #f1f5f9;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--radius: 8px;--radius-lg: 12px;--radius-xl: 16px;--font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-display: "Orbitron", var(--font-main);--max-width: 1200px;--transition: all .2s ease}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font-main);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{text-decoration:none;color:inherit}ul{list-style:none}img{max-width:100%;display:block}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-alt)}::-webkit-scrollbar-thumb{background:var(--text-lighter);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-light)}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.navbar{position:sticky;top:0;z-index:100;background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:var(--transition)}.navbar--scrolled{border-bottom-color:var(--border);box-shadow:var(--shadow-sm)}.navbar__inner{display:flex;align-items:center;justify-content:space-between;height:64px}.navbar__logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text)}.navbar__logo-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--primary);color:#fff;border-radius:var(--radius);font-family:var(--font-display);font-size:16px;font-weight:700}.navbar__menu{display:flex;align-items:center;gap:8px}.navbar__link{padding:8px 16px;border-radius:var(--radius);font-size:14px;font-weight:500;color:var(--text-light);transition:var(--transition)}.navbar__link:hover{color:var(--text);background:var(--bg-alt)}.navbar__link--active{color:var(--primary);background:var(--primary-bg)}.navbar__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}.navbar__toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}.navbar__toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.navbar__toggle.active span:nth-child(2){opacity:0}.navbar__toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:auto}.footer__inner{display:flex;flex-direction:column;gap:24px;align-items:center;text-align:center}.footer__logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;color:var(--text)}.footer__logo-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--primary);color:#fff;border-radius:var(--radius);font-family:var(--font-display);font-size:14px;font-weight:700}.footer__tagline{color:var(--text-light);font-size:14px;margin-top:4px}.footer__links{display:flex;gap:24px}.footer__links a{color:var(--text-light);font-size:14px;transition:var(--transition)}.footer__links a:hover{color:var(--primary)}.footer__bottom{padding-top:24px;border-top:1px solid var(--border);width:100%}.footer__bottom p{color:var(--text-lighter);font-size:13px}.main-content{min-height:calc(100vh - 244px)}.app-layout{display:flex;flex-direction:column;min-height:100vh}.hero{padding:80px 0 60px;text-align:center;background:linear-gradient(180deg,var(--primary-bg) 0%,var(--bg) 100%)}.hero__title{font-size:clamp(32px,5vw,48px);font-weight:800;color:var(--text);line-height:1.2;margin-bottom:16px}.hero__title span{color:var(--primary)}.hero__subtitle{font-size:clamp(16px,2.5vw,20px);color:var(--text-light);max-width:600px;margin:0 auto 32px;line-height:1.6}.hero__actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);border:1px solid transparent;font-family:var(--font-main)}.btn--primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn--primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);box-shadow:var(--shadow-md)}.btn--secondary{background:#fff;color:var(--text);border-color:var(--border)}.btn--secondary:hover{background:var(--bg-alt);border-color:var(--text-lighter)}.btn--danger{background:#fff;color:#dc2626;border-color:#fecaca}.btn--danger:hover{background:#fef2f2;border-color:#dc2626}.btn--small{padding:6px 12px;font-size:13px}.btn--icon{padding:8px;min-width:36px;justify-content:center}.section{padding:64px 0}.section__header{margin-bottom:40px}.section__title{font-size:28px;font-weight:700;color:var(--text);margin-bottom:8px}.section__subtitle{font-size:16px;color:var(--text-light)}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}.course-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition);display:flex;flex-direction:column}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);border-color:var(--primary-light)}.course-card__image{width:100%;height:180px;object-fit:cover;background:var(--bg-alt)}.course-card__body{padding:20px;flex:1;display:flex;flex-direction:column}.course-card__title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px;line-height:1.3}.course-card__description{font-size:14px;color:var(--text-light);line-height:1.5;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.course-card__meta{display:flex;align-items:center;gap:12px;margin-top:16px;padding-top:16px;border-top:1px solid var(--border-light);font-size:13px;color:var(--text-lighter)}.course-card__badge{display:inline-flex;align-items:center;padding:2px 8px;background:var(--primary-bg);color:var(--primary);border-radius:4px;font-size:12px;font-weight:600}.course-header{padding:48px 0 32px;background:var(--bg-alt);border-bottom:1px solid var(--border)}.course-header__title{font-size:clamp(24px,4vw,36px);font-weight:700;color:var(--text);margin-bottom:12px}.course-header__description{font-size:16px;color:var(--text-light);max-width:700px;line-height:1.6}.course-header__stats{display:flex;gap:24px;margin-top:20px;font-size:14px;color:var(--text-light)}.module-list{display:flex;flex-direction:column;gap:16px}.module-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.module-item__header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;transition:var(--transition)}.module-item__header:hover{background:var(--bg-alt)}.module-item__title{font-size:16px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:12px}.module-item__number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--primary-bg);color:var(--primary);border-radius:50%;font-size:13px;font-weight:700;flex-shrink:0}.module-item__count{font-size:13px;color:var(--text-lighter)}.module-item__arrow{transition:transform .2s ease;color:var(--text-lighter)}.module-item__arrow--open{transform:rotate(180deg)}.module-item__lessons{border-top:1px solid var(--border-light)}.lesson-link{display:flex;align-items:center;gap:12px;padding:14px 24px 14px 60px;font-size:14px;color:var(--text-light);transition:var(--transition);border-bottom:1px solid var(--border-light)}.lesson-link:last-child{border-bottom:none}.lesson-link:hover{background:var(--primary-bg);color:var(--primary)}.lesson-link__icon{width:20px;height:20px;flex-shrink:0}.lesson-layout{display:grid;grid-template-columns:280px 1fr;min-height:calc(100vh - 64px)}.lesson-sidebar{background:var(--bg-alt);border-right:1px solid var(--border);padding:24px 0;overflow-y:auto;position:sticky;top:64px;height:calc(100vh - 64px)}.lesson-sidebar__title{font-size:13px;font-weight:600;color:var(--text-lighter);text-transform:uppercase;letter-spacing:.5px;padding:0 20px;margin-bottom:16px}.lesson-sidebar__module{margin-bottom:8px}.lesson-sidebar__module-title{font-size:13px;font-weight:600;color:var(--text);padding:8px 20px}.lesson-sidebar__link{display:block;padding:8px 20px 8px 36px;font-size:13px;color:var(--text-light);transition:var(--transition);border-left:2px solid transparent}.lesson-sidebar__link:hover{color:var(--primary);background:#2563eb0a}.lesson-sidebar__link--active{color:var(--primary);background:var(--primary-bg);border-left-color:var(--primary);font-weight:500}.lesson-content{padding:40px 48px;max-width:800px}.lesson-content__breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lighter);margin-bottom:24px}.lesson-content__breadcrumb a{color:var(--text-light);transition:var(--transition)}.lesson-content__breadcrumb a:hover{color:var(--primary)}.lesson-content__title{font-size:28px;font-weight:700;color:var(--text);margin-bottom:32px;line-height:1.3}.lesson-nav{display:flex;justify-content:space-between;margin-top:48px;padding-top:24px;border-top:1px solid var(--border)}.lesson-nav__btn{display:flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;color:var(--text-light);transition:var(--transition);background:#fff}.lesson-nav__btn:hover{border-color:var(--primary);color:var(--primary)}.content-block{margin-bottom:24px}.content-block--text{font-size:16px;line-height:1.8;color:var(--text)}.content-block--text h1,.content-block--text h2,.content-block--text h3{font-family:var(--font-main);text-transform:none;letter-spacing:normal;margin:24px 0 12px;font-weight:600}.content-block--text h1{font-size:24px}.content-block--text h2{font-size:20px}.content-block--text h3{font-size:17px}.content-block--text p{margin-bottom:16px}.content-block--text ul,.content-block--text ol{margin-bottom:16px;padding-left:24px}.content-block--text ul{list-style:disc}.content-block--text ol{list-style:decimal}.content-block--text li{margin-bottom:4px}.content-block--text a{color:var(--primary);text-decoration:underline}.content-block--text code{background:var(--bg-alt);padding:2px 6px;border-radius:4px;font-size:14px;font-family:SF Mono,Fira Code,monospace}.content-block--text blockquote{border-left:3px solid var(--primary);padding-left:16px;margin:16px 0;color:var(--text-light);font-style:italic}.content-block--text table{width:100%;border-collapse:collapse;margin-bottom:16px}.content-block--text th,.content-block--text td{padding:8px 12px;border:1px solid var(--border);text-align:left}.content-block--text th{background:var(--bg-alt);font-weight:600}.content-block--video{border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:16/9;background:#000}.content-block--video iframe,.content-block--video>div{width:100%;height:100%}.content-block--code{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border)}.content-block--code__header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--bg-alt);border-bottom:1px solid var(--border);font-size:13px;color:var(--text-light)}.content-block--code pre{margin:0!important;border-radius:0!important}.content-block--image img{border-radius:var(--radius-lg);width:100%;box-shadow:var(--shadow)}.content-block--image figcaption{text-align:center;font-size:13px;color:var(--text-lighter);margin-top:8px}.content-block--download{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition)}.content-block--download:hover{border-color:var(--primary);background:var(--primary-bg)}.content-block--download__icon{width:40px;height:40px;background:var(--primary-bg);color:var(--primary);display:flex;align-items:center;justify-content:center;border-radius:var(--radius);flex-shrink:0}.content-block--download__info{flex:1}.content-block--download__label{font-size:14px;font-weight:600;color:var(--text)}.content-block--download__filename{font-size:12px;color:var(--text-lighter)}.admin-layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.admin-sidebar{background:var(--bg-alt);border-right:1px solid var(--border);padding:24px 0}.admin-sidebar__logo{display:flex;align-items:center;gap:10px;padding:0 20px;margin-bottom:32px;font-weight:700;font-size:16px;color:var(--text)}.admin-sidebar__nav{display:flex;flex-direction:column;gap:2px}.admin-sidebar__link{display:flex;align-items:center;gap:10px;padding:10px 20px;font-size:14px;color:var(--text-light);transition:var(--transition)}.admin-sidebar__link:hover{color:var(--text);background:#0000000a}.admin-sidebar__link--active{color:var(--primary);background:var(--primary-bg);font-weight:500}.admin-main{padding:32px 40px;background:var(--bg)}.admin-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}.admin-header__title{font-size:24px;font-weight:700;color:var(--text);font-family:var(--font-main);text-transform:none;letter-spacing:normal}.admin-header__breadcrumb{font-size:13px;color:var(--text-lighter);margin-top:4px}.admin-header__breadcrumb a{color:var(--text-light)}.admin-header__breadcrumb a:hover{color:var(--primary)}.admin-login{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg-alt)}.admin-login__card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.admin-login__title{font-size:24px;font-weight:700;text-align:center;margin-bottom:8px;font-family:var(--font-main);text-transform:none;letter-spacing:normal}.admin-login__subtitle{text-align:center;color:var(--text-light);font-size:14px;margin-bottom:32px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:500;color:var(--text);margin-bottom:6px}.form-input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:var(--font-main);color:var(--text);transition:var(--transition);background:#fff}.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.form-input--textarea{resize:vertical;min-height:100px}.form-input--code{font-family:SF Mono,Fira Code,monospace;font-size:13px;min-height:200px;background:#1e1e1e;color:#d4d4d4;border-color:#333}.form-input--code:focus{border-color:var(--primary)}select.form-input{cursor:pointer}.admin-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.admin-table th,.admin-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border-light)}.admin-table th{background:var(--bg-alt);font-size:13px;font-weight:600;color:var(--text-light);text-transform:uppercase;letter-spacing:.5px}.admin-table td{font-size:14px}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:var(--bg-alt)}.admin-table__actions{display:flex;gap:8px}.block-editor{display:flex;flex-direction:column;gap:16px}.block-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition)}.block-item:hover{border-color:var(--text-lighter)}.block-item__header{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-alt);border-bottom:1px solid var(--border-light)}.block-item__drag{cursor:grab;color:var(--text-lighter);display:flex;align-items:center}.block-item__type{font-size:12px;font-weight:600;text-transform:uppercase;color:var(--text-lighter);letter-spacing:.5px}.block-item__actions{margin-left:auto;display:flex;gap:4px}.block-item__body{padding:16px}.add-block-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:16px;border:2px dashed var(--border);border-radius:var(--radius-lg);color:var(--text-lighter);font-size:14px;cursor:pointer;transition:var(--transition);background:transparent;width:100%;font-family:var(--font-main)}.add-block-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-bg)}.add-block-menu{display:flex;gap:8px;flex-wrap:wrap;padding:16px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg)}.add-block-menu__item{padding:8px 16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;cursor:pointer;transition:var(--transition);font-family:var(--font-main);color:var(--text)}.add-block-menu__item:hover{border-color:var(--primary);color:var(--primary)}.status-badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:500}.status-badge--published{background:#dcfce7;color:#16a34a}.status-badge--draft{background:#fef3c7;color:#d97706}.sortable-item{display:flex;align-items:center;gap:12px;padding:14px 16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:8px;transition:var(--transition)}.sortable-item:hover{border-color:var(--text-lighter)}.sortable-item__drag{cursor:grab;color:var(--text-lighter);display:flex}.sortable-item__content{flex:1}.sortable-item__title{font-size:14px;font-weight:500;color:var(--text)}.sortable-item__meta{font-size:12px;color:var(--text-lighter);margin-top:2px}.sortable-item__actions{display:flex;gap:4px}.empty-state{text-align:center;padding:60px 20px;color:var(--text-lighter)}.empty-state__icon{font-size:48px;margin-bottom:16px}.empty-state__title{font-size:18px;font-weight:600;color:var(--text-light);margin-bottom:8px;font-family:var(--font-main);text-transform:none;letter-spacing:normal}.empty-state__text{font-size:14px;margin-bottom:24px}.loading{display:flex;align-items:center;justify-content:center;padding:60px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.navbar__toggle{display:flex}.navbar__menu{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:12px;box-shadow:var(--shadow-lg)}.navbar__menu--open{display:flex}.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{display:none}.lesson-content{padding:24px}.admin-layout{grid-template-columns:1fr}.admin-sidebar{display:none}.admin-main{padding:20px}.courses-grid{grid-template-columns:1fr}}