.student-materials{--mt-bg:#f5f7fa;--mt-surface:#fff;--mt-text:#202636;--mt-muted:#647184;--mt-border:#dfe5ed;--mt-accent:#0245ae;--mt-tint:#edf4ff;background:var(--mt-bg);color:var(--mt-text);min-height:100vh;margin-left:116px}[data-theme=dark] .student-materials{--mt-bg:var(--fxv-bg,#202020);--mt-surface:var(--fxv-surface,#262626);--mt-text:var(--fxv-text,#f1f3f6);--mt-muted:var(--fxv-text-muted,#aab2bd);--mt-border:var(--fxv-border,#3c3c3c);--mt-accent:#79b5ff;--mt-tint:#293646;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}.student-materials .materials-page{background:var(--mt-bg);min-height:100vh;padding:132px 32px 64px}.materials-container{width:100%;min-width:0;max-width:1200px;margin:auto}.materials-heading{align-items:center;gap:16px;margin-bottom:32px;display:flex}.materials-heading>div{min-width:0}.materials-heading-art{object-fit:contain;flex-shrink:0;width:64px;height:64px}.materials-eyebrow{color:var(--mt-muted);font-size:12px;font-weight:600;display:block}.materials-heading h1{color:var(--mt-text);letter-spacing:0;overflow-wrap:anywhere;margin:4px 0 0;font-size:28px;font-weight:800;line-height:1.35}.student-materials .materials-book-button{background:#0245ae;border:1px solid #0245ae;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;gap:8px;min-height:44px;margin-left:auto;padding:10px 16px;font-size:14px;font-weight:700;line-height:1.5;text-decoration:none;display:inline-flex;color:#fff!important}.student-materials .materials-book-button:hover{background:#003b96}.materials-toolbar{justify-content:space-between;align-items:center;gap:20px;display:flex}.materials-collections{border:1px solid var(--mt-border);background:var(--mt-surface);border-radius:8px;gap:4px;padding:4px;display:flex}.materials-collections button{min-height:38px;color:var(--mt-muted);cursor:pointer;letter-spacing:0;background:0 0;border:0;border-radius:5px;padding:8px 14px;font-size:13px;font-weight:600;line-height:1.5}.materials-collections button.active{background:var(--mt-tint);color:var(--mt-accent)}.materials-search-field{border:1px solid var(--mt-border);background:var(--mt-surface);width:340px;max-width:100%;min-height:46px;color:var(--mt-muted);border-radius:8px;align-items:center;gap:10px;padding:0 12px;display:flex}.materials-search-field input{width:100%;min-width:0;height:44px;color:var(--mt-text);box-shadow:none;background:0 0;border:0;border-radius:0;flex:1;padding:0;font-size:14px}.materials-search-field input:focus{outline:none}.materials-search-field:focus-within{outline:2px solid var(--mt-accent);outline-offset:2px}.materials-search-field input::placeholder{color:var(--mt-muted)}.materials-search-field input::-webkit-search-cancel-button{display:none}.materials-search-field button{width:28px;height:28px;color:var(--mt-muted);cursor:pointer;background:0 0;border:0;border-radius:4px;justify-content:center;align-items:center;padding:0;display:inline-flex}[data-theme=dark] .student-materials .materials-search-field input{color:var(--mt-text);background:0 0;border:0}.student-materials svg{flex-shrink:0}.materials-result-count{color:var(--mt-muted);margin:16px 0 24px;font-size:12px}.materials-course-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:24px;display:grid}.student-materials .materials-course{border:1px solid var(--mt-border);background:var(--mt-surface);min-width:0;color:var(--mt-text);border-radius:8px;flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.materials-course:hover{border-color:var(--mt-accent)}.materials-course-art{aspect-ratio:16/9;background:#dceeff;width:100%;overflow:hidden}.materials-course-art img{object-fit:cover;object-position:center;width:100%;height:100%;display:block}.materials-course-content{flex-direction:column;flex:1;min-width:0;padding:24px;display:flex}.materials-course-category{color:var(--mt-accent);margin-bottom:8px;font-size:12px;font-weight:600}.materials-course h2{color:var(--mt-text);letter-spacing:0;overflow-wrap:anywhere;margin:0 0 12px;font-size:20px;font-weight:700;line-height:1.4}.materials-course p{color:var(--mt-muted);margin:0 0 24px;font-size:14px;line-height:1.65}.materials-course-footer{border-top:1px solid var(--mt-border);color:var(--mt-accent);justify-content:space-between;align-items:center;gap:16px;margin-top:auto;padding-top:16px;font-size:13px;font-weight:600;display:flex}.student-materials .materials-course-footer>span{color:var(--mt-accent)!important}[data-theme=dark] .student-materials .materials-course-category,[data-theme=dark] .student-materials .materials-course-footer{color:var(--mt-accent)}.materials-empty{border:1px solid var(--mt-border);background:var(--mt-surface);text-align:center;border-radius:8px;padding:48px 24px}.materials-empty img{object-fit:contain;margin-bottom:20px}.materials-empty h2{color:var(--mt-text);letter-spacing:0;margin:0 0 8px;font-size:20px;font-weight:700;line-height:1.4}.materials-empty p{color:var(--mt-muted);overflow-wrap:anywhere;margin:0 0 24px;font-size:14px;line-height:1.6}.materials-reset-button{border:1px solid var(--mt-border);background:var(--mt-surface);min-height:44px;color:var(--mt-accent);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:600;display:inline-flex}.student-materials :is(a,button):focus-visible{outline:2px solid var(--mt-accent);outline-offset:3px}@media (width>=1200px){.materials-container{position:relative;left:-24px}}@media (width<=1500px){.student-materials{margin-left:95px}}@media (width<=1199px){.student-materials{margin-left:0}.student-materials .materials-page{padding-bottom:140px}}@media (width<=991px){.student-materials .materials-page{padding-top:148px;padding-bottom:64px}.materials-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.materials-toolbar{flex-wrap:wrap;gap:16px}.materials-search-field{width:100%}}@media (width<=768px){.student-materials .materials-page{padding-inline:20px}.materials-heading h1{font-size:24px}.materials-course-content{padding:20px}.materials-course h2{font-size:18px}.materials-course-grid{gap:20px}}@media (width<=600px){.student-materials .materials-page{padding:116px 16px 40px}.materials-heading{flex-wrap:wrap;gap:12px;margin-bottom:24px}.materials-heading-art{width:48px;height:48px}.materials-heading>div{flex:1}.materials-heading h1{font-size:22px}.student-materials .materials-book-button{width:100%;margin:8px 0 0}.materials-collections{width:100%}.materials-collections button{flex:1;padding:8px 6px;font-size:12px}.materials-course-grid{grid-template-columns:minmax(0,1fr)}.materials-result-count{margin-bottom:20px}.materials-empty{padding:32px 20px}}@media (width<=360px){.student-materials .menu-wrap.main-menu .brand-text{font-size:16px}}.lesson-fullpage{z-index:9999;background:#f8fafc;width:100vw;height:100vh;position:fixed;inset:0}.lesson-back-btn{z-index:10001;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#1e293b;cursor:pointer;background:#fffffff2;border:1px solid #0000001a;border-radius:10px;align-items:center;gap:8px;padding:10px 16px;font-size:14px;font-weight:600;transition:all .2s;display:flex;position:fixed;top:16px;left:16px;box-shadow:0 2px 8px #0000001a}.lesson-back-btn:hover{color:#0245ae;background:#fff;border-color:#0245ae;transform:translate(-2px);box-shadow:0 4px 12px #0245ae33}.lesson-back-btn i{font-size:14px}.lesson-fullpage-iframe{border:none;width:100%;height:100%;transition:opacity .3s;display:block;position:absolute;top:0;left:0}.lesson-fullpage-iframe.loading{opacity:0}.lesson-fullpage-iframe.loaded{opacity:1}.lesson-fullpage-loading{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:100%;display:flex;position:absolute;inset:0}.lesson-fullpage-loading .spinner{border:4px solid #e2e8f0;border-top-color:#0245ae;border-radius:50%;width:48px;height:48px;margin-bottom:16px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.lesson-fullpage-loading p{color:#64748b;font-size:14px}.lesson-content-wrapper{width:100%;height:100%;padding-top:60px;overflow-y:auto}.lesson-fullpage-error{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:100%;padding:20px;display:flex}.lesson-fullpage-error .error-icon{background:#fee2e2;border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;margin-bottom:16px;display:flex}.lesson-fullpage-error .error-icon i{color:#ef4444;font-size:28px}.lesson-fullpage-error h3{color:#1e293b;margin:0 0 8px;font-size:18px;font-weight:700}.lesson-fullpage-error p{color:#64748b;margin:0 0 20px;font-size:14px}.lesson-fullpage-error .btn-back{color:#fff;cursor:pointer;background:linear-gradient(135deg,#0245ae 0%,#4a9eff 100%);border:none;border-radius:10px;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.lesson-fullpage-error .btn-back:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0245ae4d}@media (width<=768px){.lesson-back-btn{padding:8px 12px;font-size:13px;top:12px;left:12px}.lesson-back-btn span{display:none}.lesson-content-wrapper{padding-top:50px}}[data-theme=dark] .lesson-fullpage,[data-theme=dark] .lesson-content-wrapper,[data-theme=dark] .lesson-fullpage-loading,[data-theme=dark] .lesson-fullpage-error{background:var(--fxv-bg);color:var(--fxv-text)}[data-theme=dark] .lesson-back-btn{color:var(--fxv-text);box-shadow:var(--fxv-shadow-sm);background:#1e1e1eeb;border-color:#ffffff14}[data-theme=dark] .lesson-back-btn:hover{background:var(--fxv-surface);color:var(--fxv-accent-strong);border-color:#7cb8ff3d}[data-theme=dark] .lesson-fullpage-loading p,[data-theme=dark] .lesson-fullpage-error p{color:var(--fxv-text-muted)}[data-theme=dark] .lesson-fullpage-error h3{color:var(--fxv-text)}