:root{--color-primary: #1a365d;--color-secondary: #c0a080;--color-accent: #2c5282;--color-background: #ffffff;--color-surface: #f8fafc;--color-text-main: #2d3748;--color-text-muted: #718096;--color-white: #ffffff;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 2rem;--spacing-lg: 2rem;--spacing-xl: 4rem;--transition-smooth: all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--color-text-main);background-color:var(--color-background);line-height:1.6}h1,h2,h3,h4{color:var(--color-primary);font-weight:700;line-height:1.2}a{text-decoration:none;color:inherit;transition:var(--transition-smooth)}button{cursor:pointer;border:none;background:none;font-family:inherit;transition:var(--transition-smooth)}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-sm)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.8rem 1.5rem;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:var(--transition-smooth);border:1px solid transparent;text-decoration:none}.btn-primary{background-color:var(--color-primary);color:var(--color-white);box-shadow:0 4px 6px -1px #1a365d1a,0 2px 4px -1px #1a365d0f}.btn-primary:hover{background-color:var(--color-accent);transform:translateY(-1px);box-shadow:0 10px 15px -3px #1a365d1a,0 4px 6px -2px #1a365d0d;color:var(--color-white)}.btn-outline{background-color:transparent;color:var(--color-primary);border:1px solid var(--color-primary)}.btn-outline:hover{background-color:#1a365d0d;color:var(--color-primary)}.header{height:70px;display:flex;align-items:center;background-color:var(--color-white);box-shadow:0 2px 10px #00000012;position:sticky;top:0;z-index:1000}.header__container{display:flex;justify-content:space-between;align-items:center;width:100%;gap:1rem}.header__logo h1{font-size:1.825rem;letter-spacing:-.02em;white-space:nowrap}.korean-title{font-size:1.15rem;margin-left:8px;font-weight:500;color:var(--color-text-main);vertical-align:middle}.header__nav ul{display:flex;list-style:none;gap:.2rem;align-items:center;flex-wrap:nowrap;white-space:nowrap}.header__nav a{font-weight:500;font-size:1.195rem;color:var(--color-text-main);padding:.4rem .55rem;border-radius:6px;transition:background .15s,color .15s;display:block}.header__nav a:hover{color:var(--color-secondary);background:#6366f112}.user-profile-link{color:var(--color-primary)!important;font-weight:700!important}.nav-dropdown{position:relative}.nav-dropdown__trigger{display:flex;align-items:center;gap:.25rem;background:none;border:none;font-size:1.195rem;font-weight:500;color:var(--color-text-main);padding:.4rem .55rem;border-radius:6px;cursor:pointer;transition:background .15s,color .15s;white-space:nowrap}.nav-dropdown__trigger:hover,.nav-dropdown.open .nav-dropdown__trigger{color:var(--color-secondary);background:#6366f112}.dropdown-arrow{font-size:.85rem;opacity:.6;transition:transform .2s}.nav-dropdown.open .dropdown-arrow{transform:rotate(180deg)}.nav-dropdown__menu{position:absolute;top:calc(100% + 6px);left:50%;transform:translate(-50%);background:#fff;border:1px solid #e2e8f0;border-radius:12px;box-shadow:0 10px 40px #0000001f;padding:.5rem;list-style:none;min-width:160px;display:flex;flex-direction:column;gap:.2rem;animation:dropFade .15s ease;z-index:2000}@keyframes dropFade{0%{opacity:0;transform:translate(-50%) translateY(-6px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.nav-dropdown__menu li a{display:flex;align-items:center;gap:.5rem;padding:.55rem .9rem;border-radius:8px;font-size:1.195rem;font-weight:500;color:#334155;white-space:nowrap;transition:background .15s,color .15s}.nav-dropdown__menu li a:hover{background:#f1f5f9;color:#1e293b}.dropdown-admin-link{color:#7c3aed!important;font-weight:600!important}.dropdown-admin-link:hover{background:#f5f3ff!important;color:#6d28d9!important}.logout-btn{background:none;border:1.5px solid #e2e8f0;color:#64748b;padding:.38rem .75rem;border-radius:6px;font-size:1.12rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.logout-btn:hover{background:#fee2e2;border-color:#fca5a5;color:#dc2626}.admin-link{background-color:var(--color-secondary);color:#fff!important;padding:.4rem .8rem;border-radius:4px;font-size:1.15rem!important;font-weight:600}.admin-link:hover{background-color:var(--color-primary)}.language-selector{display:flex;align-items:center;margin-left:.5rem}.lang-select{background-color:#f8fafc;color:var(--color-text-main);border:1.5px solid #e2e8f0;padding:.4rem 2.2rem .4rem .8rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;outline:none;transition:all .2s ease;appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right .6rem center;background-size:1em}.lang-select:hover{background-color:#e2e8f0;border-color:#cbd5e1;color:var(--color-primary)}.lang-select:focus{border-color:#6366f1;box-shadow:0 0 0 2px #6366f133}.burger-menu{display:none;flex-direction:column;justify-content:space-around;width:1.8rem;height:1.5rem;background:transparent;border:none;cursor:pointer;padding:0;z-index:10;flex-shrink:0}.burger-menu:focus{outline:none}.burger-line{width:1.8rem;height:.2rem;background:var(--color-text-main, #333);border-radius:10px;transition:all .3s linear;position:relative;transform-origin:1px}.burger-menu.open .burger-line:first-child{transform:rotate(45deg)}.burger-menu.open .burger-line:nth-child(2){opacity:0;transform:translate(20px)}.burger-menu.open .burger-line:nth-child(3){transform:rotate(-45deg)}@media(max-width:900px){.burger-menu{display:flex}.header__logo h1{font-size:1.65rem;display:flex;align-items:center}.korean-title{font-size:1.17rem;margin-left:6px}.header__nav{position:absolute;top:70px;left:0;width:100%;background-color:var(--color-white, #fff);box-shadow:0 4px 6px #0000001a;padding:1.5rem 0;display:none;max-height:calc(100vh - 70px);overflow-y:auto}.header__nav.open{display:block;animation:slideDown .3s ease-out forwards}.header__nav ul{flex-direction:column;align-items:center;gap:.8rem;width:100%;padding:0;flex-wrap:wrap}.header__nav a{font-size:1.5rem;padding:.5rem 1rem;text-align:center}.nav-dropdown__trigger{font-size:1.5rem}.nav-dropdown__menu{position:static;transform:none;box-shadow:none;border:none;background:#f8fafc;border-radius:8px;animation:none;padding:.3rem .5rem}.nav-dropdown.open .nav-dropdown__menu{display:block}.logout-btn{font-size:1.5rem;padding:.5rem 1rem}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.hero{padding:var(--spacing-xl) 0;background:linear-gradient(#0009,#0009),url(https://images.unsplash.com/photo-1504052434569-70ad5836ab65?auto=format&fit=crop&q=80) 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2.5rem;border-radius:50px}.hero__btn.btn-outline:hover{background-color:var(--color-white);color:#333}@media(max-width:768px){.hero__title{font-size:2.2rem}.hero__description{font-size:1rem}.hero{min-height:60vh}}.section{padding:var(--spacing-xl) 0}.section__header{text-align:center;margin-bottom:var(--spacing-lg)}.section__subtitle{color:var(--color-secondary);font-weight:700;font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;display:block;margin-bottom:var(--spacing-xs)}.section__title{font-size:2.5rem}.about__grid{display:grid;grid-template-columns:1.2fr 1fr;gap:var(--spacing-lg);align-items:center}.about__text h3{font-size:1.8rem;margin-bottom:var(--spacing-sm)}.about__text p{color:var(--color-text-muted);margin-bottom:var(--spacing-md)}.about__list{list-style:none}.about__list li{position:relative;padding-left:1.5rem;margin-bottom:.5rem;font-weight:500}.about__list li:before{content:"✓";position:absolute;left:0;color:var(--color-secondary);font-weight:700}.about__image img{width:100%;border-radius:8px;box-shadow:20px 20px 0 var(--color-surface)}@media(max-width:768px){.about__grid{grid-template-columns:1fr;gap:var(--spacing-xl)}.about__image img{box-shadow:10px 10px 0 var(--color-surface)}}.services{background-color:var(--color-surface)}.services__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-md)}.service-card{background-color:var(--color-white);padding:var(--spacing-md);border-radius:12px;text-align:center;transition:var(--transition-smooth);border:1px solid rgba(0,0,0,.05)}.service-card:hover{transform:translateY(-10px);box-shadow:0 20px 40px #0000001a}.service-card__icon{font-size:3rem;margin-bottom:var(--spacing-sm)}.service-card__title{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.service-card__description{color:var(--color-text-muted)}.recent-albums{background-color:var(--color-surface);padding-top:1rem;padding-bottom:5rem}.album-grid-wrapper{margin-top:0}.recent-album-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;width:100%}.recent-album-card{position:relative;width:100%;aspect-ratio:1 / 1;overflow:hidden;border-radius:4px;display:block;background:#000}.recent-album-image{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;display:block}.recent-album-placeholder{width:100%;height:100%;background-color:#333;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem}.recent-album-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#0009;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s ease}.recent-album-card:hover .recent-album-overlay{opacity:1}.recent-album-card:hover .recent-album-image{transform:scale(1.05)}.recent-album-title{color:#fff;font-size:1.1rem;font-weight:600;text-align:center;padding:1rem;margin:0}@media(max-width:992px){.recent-album-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:768px){.recent-album-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:480px){.recent-album-grid{grid-template-columns:1fr}}.album-page{min-height:70vh}.album-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;margin-top:2rem}.album-card{background:var(--color-white);border-radius:12px;overflow:hidden;box-shadow:0 4px 6px #0000000d;transition:var(--transition-smooth);display:flex;flex-direction:column;border:1px solid #f1f5f9}.album-card:hover{transform:translateY(-5px);box-shadow:0 12px 20px #0000001a}.album-card__image{width:100%;height:220px;object-fit:cover;border-bottom:3px solid var(--color-primary)}.album-card__image-placeholder{width:100%;height:220px;background-color:var(--color-surface);display:flex;align-items:center;justify-content:center;color:var(--color-text-muted);font-size:.9rem;border-bottom:3px solid var(--color-primary)}.album-card__content{padding:1.5rem;flex-grow:1;display:flex;flex-direction:column}.album-card__title{font-size:1.1rem;font-weight:700;margin-bottom:.5rem;color:var(--color-text-main);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.album-card__info{display:flex;justify-content:space-between;font-size:.85rem;color:var(--color-text-muted);margin-top:auto;padding-top:1rem;border-top:1px solid #f1f5f9}.album-detail__header{border-bottom:2px solid var(--color-primary);padding-bottom:1rem;margin-bottom:2rem;text-align:center}.album-detail__header h2{font-size:2rem;margin-bottom:.5rem}.album-detail__info{display:flex;justify-content:center;gap:1.5rem;color:var(--color-text-muted);font-size:.9rem}.album-detail__gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(400px,1fr));gap:1.5rem;margin-bottom:2.5rem}.album-detail__image{width:100%;height:auto;border-radius:8px;box-shadow:0 4px 10px #0000001a;object-fit:contain;background:#f8fafc}.album-detail__text{font-size:1.05rem;line-height:1.8;color:var(--color-text-main);padding:2rem;background:var(--color-surface);border-radius:12px;margin-bottom:2rem}.album-detail__actions{display:flex;justify-content:space-between;align-items:center;padding-top:1.5rem;border-top:1px solid #eee}@media(max-width:768px){.album-grid,.album-detail__gallery{grid-template-columns:1fr}}.section__header-top{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:var(--spacing-xs)}.view-all{font-size:.9rem;color:var(--color-text-muted);font-weight:500}.view-all:hover{color:var(--color-secondary)}.recent-notices__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1rem}.notice-card{padding:1.2rem;background-color:var(--color-white);border:1px solid #eee;border-radius:8px;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}.notice-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000000d}.notice-card__date{font-size:.85rem;color:var(--color-secondary);font-weight:600;margin-bottom:.3rem}.notice-card__title{font-size:1.15rem;margin-bottom:.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.notice-card__title a{color:var(--color-text-main)}.notice-card__title a:hover{color:var(--color-primary)}.notice-card__summary{color:var(--color-text-muted);font-size:.95rem;margin-bottom:0;flex-grow:1}.recent-classrooms{background-color:#f8fafc}.recent-classrooms .section__description{color:var(--color-text-muted);margin-top:.5rem;font-size:1.1rem}.recent-classrooms__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;margin-top:3rem}.home-classroom-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 15px #0000000d;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;border:1px solid #e2e8f0}.home-classroom-card:hover{transform:translateY(-8px);box-shadow:0 12px 25px #0000001a;border-color:var(--color-primary)}.home-classroom-card__image-container{position:relative;height:180px;background:linear-gradient(135deg,#1e293b,#0f172a);overflow:hidden}.home-classroom-card__image{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}.home-classroom-card:hover .home-classroom-card__image{transform:scale(1.05)}.home-classroom-card__placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:3rem;color:#ffffff80}.home-classroom-card__play-overlay{position:absolute;inset:0;background:#0000004d;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s ease}.home-classroom-card:hover .home-classroom-card__play-overlay{opacity:1}.home-classroom-card__play-overlay .play-icon{width:50px;height:50px;background:#ffffffe6;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-primary);font-size:1.2rem;padding-left:4px;transform:scale(.8);transition:transform .3s cubic-bezier(.175,.885,.32,1.275)}.home-classroom-card:hover .home-classroom-card__play-overlay .play-icon{transform:scale(1)}.home-classroom-card__tag{position:absolute;top:1rem;left:1rem;background:#ffffffe6;padding:.3rem .6rem;border-radius:6px;font-size:.75rem;font-weight:700;color:var(--color-primary);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2}.home-classroom-card__duration{position:absolute;bottom:1rem;right:1rem;background:#000000b3;color:#fff;padding:.2rem .6rem;border-radius:4px;font-size:.75rem;font-weight:500;z-index:2}.home-classroom-card__content{padding:1.25rem;flex-grow:1;display:flex;flex-direction:column}.home-classroom-card__title{font-size:1.1rem;font-weight:700;color:var(--color-text);margin-bottom:.5rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;height:3rem}.home-classroom-card__instructor{font-size:.85rem;color:#475569;margin-bottom:.75rem;font-weight:500}.home-classroom-card__desc{font-size:.85rem;color:var(--color-text-muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:1rem;flex-grow:1}.home-classroom-card__footer{margin-top:auto;padding-top:1rem;border-top:1px solid #f1f5f9}.btn-join-home{display:block;width:100%;padding:.6rem;background-color:#f8fafc;color:var(--color-primary);border:1px solid #e2e8f0;border-radius:8px;text-align:center;font-weight:600;font-size:.9rem;transition:all .2s ease}.btn-join-home:hover{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}.recent-classrooms__empty{text-align:center;padding:4rem 2rem;background:#fff;border-radius:12px;color:var(--color-text-muted);margin-top:2rem;border:1px dashed #cbd5e1}@media(max-width:1200px){.recent-classrooms__grid{grid-template-columns:repeat(2,1fr);gap:2rem}}@media(max-width:640px){.recent-classrooms__grid{grid-template-columns:1fr}}.footer{background-color:#f5f5f5;color:#666;padding:40px 0;font-size:.85rem;border-top:1px solid #e5e5e5}.footer__inner{display:flex;flex-direction:column;gap:20px}.footer__top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.footer__logo h2{color:#333;font-size:1.5rem;font-weight:700;margin:0}.footer__nav{display:flex;list-style:none;gap:20px;margin:0;padding:0}.footer__nav a{color:#666;text-decoration:none;font-weight:500}.footer__nav a:hover{color:#333;text-decoration:underline}.footer__divider{height:1px;background-color:#e0e0e0;width:100%}.footer__middle{display:flex;flex-direction:column;gap:8px}.footer__info-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px;line-height:1.6}.info-item{color:#888}.info-separator{color:#ccc;font-size:.7rem}.footer__bottom{display:flex;flex-direction:column;gap:8px;margin-top:10px}.footer__disclaimer{color:#999;font-size:.8rem;line-height:1.5}.footer__copyright{color:#aaa;margin-top:10px}@media(max-width:768px){.footer__top{flex-direction:column;align-items:flex-start}.footer__nav{flex-wrap:wrap;gap:15px}.footer__info-group{flex-direction:column;align-items:flex-start;gap:4px}.info-separator{display:none}}.notice-page{min-height:60vh}.notice-table{width:100%;border-collapse:collapse;margin-top:var(--spacing-md)}.notice-table th,.notice-table td{padding:1.2rem;border-bottom:1px solid #eee;text-align:left}.notice-table th{background-color:var(--color-surface);font-weight:600}.notice-table__title a{font-weight:500}.notice-table__title a:hover{text-decoration:underline;color:var(--color-secondary)}.notice-detail__header{border-bottom:2px solid var(--color-primary);padding-bottom:var(--spacing-sm);margin-bottom:var(--spacing-md)}.notice-detail__info{display:flex;gap:var(--spacing-md);color:var(--color-text-muted);font-size:.9rem;margin-top:var(--spacing-xs)}.notice-detail__content{min-height:300px;line-height:1.8;margin-bottom:var(--spacing-lg)}.notice-detail__actions{text-align:center;border-top:1px solid #eee;padding-top:var(--spacing-md)}.notice-form{padding:var(--spacing-lg) 0;min-height:70vh}.form-container{background:var(--color-white);padding:var(--spacing-lg);border-radius:12px;box-shadow:0 10px 30px #0000000d;max-width:800px;margin:0 auto;border:1px solid #e2e8f0}.form-group{margin-bottom:1.5rem;display:flex;flex-direction:column}.form-group label{font-size:.95rem;font-weight:600;color:var(--color-primary);margin-bottom:.5rem;letter-spacing:-.01em}.form-input{width:100%;padding:.8rem 1rem;font-size:1rem;border:1px solid #cbd5e1;border-radius:8px;background-color:var(--color-surface);color:var(--color-text-main);transition:var(--transition-smooth);font-family:inherit}.form-input:focus{outline:none;border-color:var(--color-accent);background-color:var(--color-white);box-shadow:0 0 0 3px #2c52821a}.form-input::placeholder{color:#94a3b8}.text-area{resize:vertical;min-height:250px;line-height:1.6}input[type=file].form-input{padding:.6rem;background:transparent;border:1px dashed #cbd5e1;cursor:pointer}input[type=file].form-input:hover{border-color:var(--color-accent);background:var(--color-surface)}.form-actions{display:flex;gap:1rem;margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid #f1f5f9}.form-actions .btn{flex:1;padding:1rem;font-size:1.05rem;border-radius:8px;font-weight:600}.about-hero{position:relative;height:60vh;min-height:400px;background-image:url(/images/hero_hebrew.png);background-size:cover;background-position:center;background-attachment:fixed;display:flex;align-items:center;color:#fff;text-align:center}.about-hero__overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#0009}.about-hero__content{position:relative;z-index:1;max-width:1200px;width:100%;margin:0 auto;padding:0 15px}.about-hero__subtitle{display:block;font-size:1.4rem;font-weight:600;letter-spacing:2px;margin-bottom:2rem;color:gold}.about-hero__title{font-size:3.5rem;font-weight:800;margin-bottom:2rem;text-shadow:0 4px 8px rgba(0,0,0,.7);color:#fff}.about-hero__desc{font-size:1.7rem;line-height:1.6;color:#f0f0f0;text-shadow:0 2px 4px 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#0000001a}.seminar-card__image-container{position:relative;height:220px}.seminar-card__image{width:100%;height:100%;object-fit:cover}.seminar-card__tag{position:absolute;top:15px;right:15px;background-color:#ffffffe6;padding:.3rem 1rem;border-radius:20px;font-size:.8rem;font-weight:600;color:#4a5568;box-shadow:0 4px 6px #0000000d}.seminar-card__content{padding:2rem;flex-grow:1;display:flex;flex-direction:column}.seminar-card__title-v2{font-size:1.5rem;margin-bottom:1.5rem;color:var(--color-text-main);line-height:1.3}.seminar-card__info-item{display:flex;align-items:center;gap:.8rem;margin-bottom:.8rem;color:var(--color-text-muted)}.seminar-card__info-item .icon{font-size:1.2rem}.seminar-card__footer{margin-top:auto;padding-top:1.5rem;border-top:1px solid 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.seminar-card__image{transform:scale(1.1)}@media(max-width:480px){.seminar-grid{grid-template-columns:1fr}}.admin-tabs-container{display:flex;justify-content:center;margin-bottom:3rem}.admin-tabs{display:flex;background:#f1f5f9;padding:.5rem;border-radius:16px;gap:.5rem}.tab-btn{padding:1rem 2rem;font-size:1rem;font-weight:700;color:var(--color-text-muted);border-radius:12px;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;gap:.8rem}.tab-btn:hover{color:var(--color-primary);background-color:#ffffff80}.tab-btn.active{color:var(--color-primary);background-color:#fff;box-shadow:0 10px 15px -3px #0000001a}.admin-premium-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:3rem;align-items:start}.glass-morphism{background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid 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.3s ease}.btn-apply-full:hover{background:#2c5282;transform:translateY(-2px)}@media(max-width:1024px){.admin-premium-layout{grid-template-columns:1fr}.admin-preview-column{position:static}}.form-actions-premium{display:flex;gap:1rem;margin-top:2rem}.btn-cancel{padding:1rem 2rem;background-color:#edf2f7;color:#4a5568;border-radius:12px;font-weight:700;transition:all .3s ease;cursor:pointer}.btn-cancel:hover{background-color:#e2e8f0}.action-buttons{display:flex;gap:.5rem}.btn-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:1.1rem;transition:all .2s ease;border:1px solid #e2e8f0;background:#fff;cursor:pointer}.btn-icon:hover{transform:translateY(-2px);box-shadow:0 4px 6px #0000001a}.btn-icon.edit:hover{background-color:#ebf8ff;border-color:#4299e1}.btn-icon.delete:hover{background-color:#fff5f5;border-color:#f56565}.admin-tabs{display:flex;gap:1rem;margin-bottom:2rem;border-bottom:2px solid 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4rem;text-align:center;position:relative;overflow:hidden}.classroom-hero:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 60%);animation:pulse-glow 4s ease-in-out infinite}@keyframes pulse-glow{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.7}}.classroom-hero__badge{display:inline-flex;align-items:center;gap:.5rem;background:#6366f133;border:1px solid rgba(99,102,241,.4);color:#a5b4fc;padding:.4rem 1.2rem;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:1.5rem;position:relative;z-index:1}.classroom-hero__title{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;margin-bottom:1rem;position:relative;z-index:1;line-height:1.2}.classroom-hero__title span{background:linear-gradient(90deg,#818cf8,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.classroom-hero__subtitle{font-size:1.1rem;color:#ffffffbf;max-width:600px;margin:0 auto 2rem;line-height:1.6;position:relative;z-index:1}.classroom-hero__actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}.btn-propose{display:inline-flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border:none;padding:.9rem 1.8rem;border-radius:50px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 20px #6366f166}.btn-propose:hover{transform:translateY(-2px);box-shadow:0 8px 30px #6366f180}.classroom-filter{background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:70px;z-index:10;box-shadow:0 2px 10px #0000000d}.classroom-filter__inner{max-width:1200px;margin:0 auto;padding:0 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1.5rem}.classroom-section-title{font-size:1.4rem;font-weight:700;color:#1e293b;margin-bottom:1.5rem;display:flex;align-items:center;gap:.5rem}.classroom-section-title:after{content:"";flex:1;height:2px;background:linear-gradient(90deg,#e0e7ff,transparent);margin-left:1rem}.lecture-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.8rem;margin-bottom:3rem}.lecture-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 2px 12px #0000000f;transition:all .3s ease;border:1px solid #f1f5f9;display:flex;flex-direction:column}.lecture-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px #0000001f;border-color:#e0e7ff}.lecture-card__thumbnail{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:#1e293b}.lecture-card__thumbnail img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}.lecture-card:hover .lecture-card__thumbnail 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