@import"https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Outfit:wght@400;500;600;700&display=swap";:root{font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--bg-primary: #0d0e12;--bg-secondary: #14151a;--bg-tertiary: #1a1b22;--bg-card: rgba(255, 255, 255, .04);--bg-card-hover: rgba(255, 255, 255, .08);--border-subtle: rgba(255, 255, 255, .06);--border-muted: rgba(255, 255, 255, .1);--text-primary: #f2f2f7;--text-secondary: #a8a8b8;--text-muted: #6e6e80;--accent: #d4563d;--accent-hover: #e86b52;--accent-muted: rgba(212, 86, 61, .18);--accent-glow: rgba(212, 86, 61, .12);--success: #3daa6e;--success-muted: rgba(61, 170, 110, .18);--info: #5a8fd4;--info-muted: rgba(90, 143, 212, .18);--radius-sm: 10px;--radius-md: 14px;--radius-lg: 18px;--shadow-sm: 0 2px 12px rgba(0, 0, 0, .25);--shadow-md: 0 8px 24px rgba(0, 0, 0, .3);--font-sans: "Outfit", "DM Sans", system-ui, sans-serif;--font-display: "Outfit", system-ui, sans-serif;--transition: .22s ease}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:var(--font-sans);font-size:16px;line-height:1.55;color:var(--text-primary);background:var(--bg-primary);background-image:radial-gradient(ellipse 120% 80% at 50% -20%,rgba(212,86,61,.06),transparent 50%)}a{color:var(--accent);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--accent-hover)}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:1rem}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.5rem}@media(max-width:640px){.container{padding:0 1rem}}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:1.25rem 1.5rem;transition:background var(--transition),border-color var(--transition)}.card:hover{background:var(--bg-card-hover);border-color:var(--border-muted);box-shadow:var(--shadow-sm)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.65rem 1.25rem;font-weight:600;font-size:.95rem;border:none;border-radius:var(--radius-sm);transition:background var(--transition),transform .1s ease}.btn:active{transform:scale(.98)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-danger{background:var(--danger, #c53030);color:#fff}.btn-danger:hover{background:var(--danger-hover, #9b2c2c)}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-muted)}.btn-ghost:hover{background:var(--bg-card);color:var(--text-primary)}.section-title{font-family:var(--font-display);font-size:1.5rem;font-weight:700;margin:0 0 1rem;letter-spacing:-.02em}.skeleton{background:linear-gradient(90deg,var(--bg-card) 25%,var(--bg-card-hover) 50%,var(--bg-card) 75%);background-size:200% 100%;animation:skeleton 1.2s ease-in-out infinite;border-radius:var(--radius-sm)}@keyframes skeleton{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes placeholderIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.footer{margin-top:auto;padding:2.5rem 0 1.5rem;border-top:1px solid var(--border-subtle);background:var(--bg-secondary)}@media(max-width:640px){.footer{padding:1.5rem 0 1rem}.footer-links{gap:.75rem}.footer-links a{font-size:.9rem}}.footer-inner{display:flex;flex-direction:column;gap:1.5rem}.footer-brand{max-width:320px}.footer-logo{font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--text-primary)}.footer-logo:hover{color:var(--accent)}.footer-tagline{margin:.5rem 0 0;font-size:.9rem;color:var(--text-muted);line-height:1.5}.footer-links{display:flex;flex-wrap:wrap;gap:1.25rem}.footer-links a{color:var(--text-secondary);font-size:.95rem}.footer-links a:hover{color:var(--text-primary)}.footer-bottom{padding-top:1rem;font-size:.85rem;color:var(--text-muted)}@media(min-width:640px){.footer-inner{flex-direction:row;flex-wrap:wrap;justify-content:space-between;align-items:flex-start}.footer-bottom{width:100%}}.layout{min-height:100vh;display:flex;flex-direction:column;background:var(--bg-primary)}.layout-header{position:sticky;top:0;z-index:1000;background:#0d0e12eb;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-subtle);overflow:visible}.layout-header .container{overflow:visible}.layout-inner{display:flex;align-items:center;gap:0;padding:.6rem 1.5rem;min-height:52px;max-width:100%}.layout-logo-wrap{flex:0 0 auto;width:6.5rem;margin-right:.5rem}.layout-logo{display:inline-block;font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--text-primary);letter-spacing:-.02em;text-decoration:none;white-space:nowrap}.layout-logo:hover{color:var(--accent)}.layout-nav{display:flex;align-items:center;gap:.2rem;flex:1 1 auto;min-width:0;overflow-x:auto;overflow-y:hidden;padding:.25rem 0;-webkit-overflow-scrolling:touch;scrollbar-width:thin}.layout-nav>*{flex-shrink:0}.layout-nav::-webkit-scrollbar{height:6px}.layout-nav::-webkit-scrollbar-track{background:var(--border-subtle);border-radius:3px}.layout-nav::-webkit-scrollbar-thumb{background:var(--border-muted);border-radius:3px}.layout-nav-link{padding:.5rem .6rem;color:var(--text-secondary);font-size:.9rem;border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition);white-space:nowrap}.layout-nav-link:hover{color:var(--text-primary);background:var(--bg-card)}.layout-nav-link--accent{color:var(--accent);font-weight:500}.layout-nav-link--accent:hover{color:var(--accent-hover);background:var(--accent-muted)}.layout-nav-divider{width:1px;height:1.25rem;background:var(--border-subtle);margin:0 .25rem;flex-shrink:0}.layout-user-wrap{position:relative;flex-shrink:0;margin-left:.25rem;z-index:1000;overflow:visible}.layout-user-btn{display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .7rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;transition:border-color var(--transition),background var(--transition);line-height:1.3}.layout-user-btn:hover{background:var(--bg-card-hover);border-color:var(--border-muted)}.layout-user-name{font-weight:500}.layout-user-chevron{font-size:.55rem;opacity:.75;transition:transform var(--transition)}.layout-user-btn[aria-expanded=true] .layout-user-chevron{transform:rotate(180deg)}.layout-dropdown{position:absolute;top:calc(100% + 6px);right:0;min-width:176px;background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:.4rem;z-index:10001;isolation:isolate}.layout-dropdown-head{padding:.5rem .75rem;border-bottom:1px solid var(--border-subtle);margin-bottom:.35rem}.layout-dropdown-role{font-size:.8rem;color:var(--text-muted);text-transform:capitalize}.layout-dropdown-item{display:block;width:100%;padding:.6rem .75rem;text-align:left;background:none;border:none;border-radius:6px;color:var(--text-secondary);font-size:.95rem;transition:background var(--transition),color var(--transition)}.layout-dropdown-item:hover{background:var(--bg-card);color:var(--accent)}.layout-auth{display:flex;align-items:center;gap:.4rem}.layout-register{padding:.45rem .9rem;font-size:.9rem}.layout-main{flex:1;padding-bottom:0}.layout-hamburger{display:none;flex-shrink:0;width:44px;height:44px;padding:10px;margin:0 -4px 0 .5rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;transition:background var(--transition),border-color var(--transition)}.layout-hamburger:hover{background:var(--bg-card-hover);border-color:var(--border-muted)}.layout-hamburger-bar{display:block;width:20px;height:2px;background:var(--text-primary);border-radius:1px;transition:transform var(--transition),opacity var(--transition)}.layout-hamburger[aria-expanded=true] .layout-hamburger-bar:nth-child(1){transform:translateY(3.5px) rotate(45deg)}.layout-hamburger[aria-expanded=true] .layout-hamburger-bar:nth-child(2){opacity:0}.layout-hamburger[aria-expanded=true] .layout-hamburger-bar:nth-child(3){transform:translateY(-3.5px) rotate(-45deg)}.layout-nav-mobile{display:none;position:fixed;inset:0;z-index:999;pointer-events:none}.layout-nav-mobile--open{pointer-events:auto}.layout-nav-mobile-backdrop{position:absolute;inset:0;background:#0009;opacity:0;transition:opacity var(--transition)}.layout-nav-mobile--open .layout-nav-mobile-backdrop{opacity:1}.layout-nav-mobile-inner{position:absolute;top:52px;left:0;right:0;max-height:calc(100vh - 52px);overflow-y:auto;background:var(--bg-secondary);border-bottom:1px solid var(--border-subtle);padding:1rem;box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:.25rem;transform:translateY(-10px);opacity:0;transition:transform var(--transition),opacity var(--transition)}.layout-nav-mobile--open .layout-nav-mobile-inner{transform:translateY(0);opacity:1}.layout-nav-mobile-inner .layout-nav-link{display:block;padding:.75rem 1rem;font-size:1rem;border-radius:var(--radius-sm)}.layout-nav-mobile-inner .layout-nav-link:hover{background:var(--bg-card)}.layout-nav-divider--block{width:100%;height:1px;margin:.5rem 0}.layout-nav-mobile-user{margin-top:.5rem;padding-top:.75rem;border-top:1px solid var(--border-subtle)}.layout-nav-mobile-user .layout-auth{flex-direction:column;align-items:stretch}.layout-nav-mobile-user .layout-register{text-align:center}.layout-nav-mobile-user .layout-user-wrap{position:static}.layout-nav-mobile-inner{padding-bottom:calc(1rem + env(safe-area-inset-bottom,0px))}.layout-nav-mobile .layout-dropdown{position:absolute;right:0;left:auto;min-width:160px}@media(max-width:900px){.layout-hamburger{display:flex}.layout-nav--desktop{display:none}.layout-nav-mobile{display:block}}@media(max-width:640px){.layout-inner{padding:.5rem 1rem;min-height:48px}.layout-logo-wrap{width:auto}.layout-nav-link{padding:.4rem .5rem;font-size:.9rem}.layout-register{padding:.5rem 1rem;font-size:.9rem}}.homepage{padding-bottom:0}.hero{padding:4rem 0 5rem;text-align:center}.hero-inner{max-width:640px;margin:0 auto}.hero-title{font-family:var(--font-display);font-size:clamp(2rem,5vw,3rem);font-weight:700;line-height:1.15;margin:0 0 1rem;letter-spacing:-.03em}.hero-accent{color:var(--accent)}.hero-subtitle{font-size:1.15rem;color:var(--text-secondary);margin:0 0 2rem;line-height:1.6}.hero-actions{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.hero-btn{min-width:140px}.features{padding:3rem 0 4rem;border-top:1px solid var(--border-subtle)}.features-title{text-align:center;margin-bottom:2rem}.features-grid{display:grid;grid-template-columns:1fr;gap:1.25rem;max-width:900px;margin:0 auto}.feature-card{padding:1.5rem}.feature-card h3{font-family:var(--font-display);font-size:1.15rem;font-weight:600;margin:0 0 .5rem}.feature-card p{margin:0;font-size:.95rem;color:var(--text-secondary);line-height:1.5}.feature-icon{font-size:2rem;margin-bottom:.75rem}.cta{padding:3rem 0 4rem;border-top:1px solid var(--border-subtle)}.cta-inner{text-align:center;max-width:480px;margin:0 auto}.cta-title{font-family:var(--font-display);font-size:1.5rem;font-weight:700;margin:0 0 .5rem}.cta-text{margin:0 0 1.5rem;color:var(--text-secondary)}.btn-lg{padding:.85rem 1.75rem;font-size:1rem}@media(min-width:640px){.features-grid{grid-template-columns:repeat(3,1fr)}}.dashboard{padding:1.5rem 0 3rem}.dashboard-header{margin-bottom:2rem}.dashboard-greeting{font-family:var(--font-display);font-size:1.75rem;font-weight:700;margin:0 0 .25rem;letter-spacing:-.02em}.dashboard-name{color:var(--accent)}.dashboard-sub{margin:0;color:var(--text-secondary);font-size:1rem}.dashboard-today-wrap,.dashboard-recent-wrap{margin-bottom:2rem;position:relative}.dashboard-today-wrap .section-title,.dashboard-recent-wrap .section-title{margin-bottom:.5rem}.dashboard-today-link,.dashboard-recent-link{display:inline-block;font-size:.9rem;margin-bottom:.75rem;color:var(--text-muted)}.dashboard-today-link:hover,.dashboard-recent-link:hover{color:var(--accent)}.dashboard-today{padding:1.5rem;max-width:420px}.dashboard-today--video{background:var(--success-muted);border-color:#3d9d6b59}.dashboard-today--live{background:var(--info-muted);border-color:#4a7dc759}.dashboard-today-badge{display:inline-block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;margin-bottom:.5rem;color:var(--text-secondary)}.dashboard-today-date{margin:0 0 .25rem;font-size:.95rem;color:var(--text-secondary)}.dashboard-today-time{margin:0 0 1rem;font-size:1.1rem;font-weight:600}.dashboard-today-btn{margin-top:.25rem}.dashboard-lessons{display:grid;grid-template-columns:1fr;gap:.75rem}.dashboard-lesson-card{display:block;padding:1rem 1.25rem;color:inherit}.dashboard-lesson-card:hover{color:inherit}.dashboard-lesson-date{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:.25rem}.dashboard-lesson-title{font-weight:500}.dashboard-empty{color:var(--text-muted);margin:0;padding:1rem 0}@media(min-width:640px){.dashboard-lessons{grid-template-columns:repeat(2,1fr)}}@media(min-width:900px){.dashboard-lessons{grid-template-columns:repeat(4,1fr)}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);padding:1.5rem}.auth-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:2rem;width:100%;max-width:380px;box-shadow:var(--shadow-md)}.auth-card h1{font-family:var(--font-display);margin:0 0 .25rem;font-size:1.75rem;font-weight:700;color:var(--text-primary)}.auth-subtitle{margin:0 0 1.5rem;color:var(--text-muted);font-size:.95rem}.auth-card form{display:flex;flex-direction:column;gap:.85rem}.auth-card input{padding:.7rem 1rem;border:1px solid var(--border-muted);border-radius:var(--radius-sm);background:var(--bg-secondary);color:var(--text-primary);font-size:1rem}.auth-card input::placeholder{color:var(--text-muted)}.auth-card button{padding:.75rem;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:1rem;font-weight:600;cursor:pointer;margin-top:.25rem;transition:background var(--transition)}.auth-card button:hover{background:var(--accent-hover)}.auth-error{background:var(--accent-muted);color:var(--accent-hover);padding:.55rem .85rem;border-radius:var(--radius-sm);font-size:.9rem}.auth-footer{margin:1.5rem 0 0;text-align:center;color:var(--text-muted);font-size:.9rem}.auth-footer a{color:var(--accent)}.auth-footer a:hover{color:var(--accent-hover)}.schedule-page{padding:1.5rem 0 3rem}.schedule-page .section-title{margin-bottom:.5rem}.schedule-intro{margin:0 0 2rem;color:var(--text-secondary);font-size:1rem}.schedule-subtitle{font-size:1.1rem;font-weight:600;margin:0 0 .75rem;color:var(--text-primary)}.schedule-today-section{margin-bottom:2.5rem}.schedule-today-skeleton{height:140px;border-radius:var(--radius-md);margin-bottom:.5rem}.schedule-today-card{max-width:400px;padding:1.5rem}.schedule-today-card--video{background:var(--success-muted);border-color:#3d9d6b59}.schedule-today-card--live{background:var(--info-muted);border-color:#4a7dc759}.schedule-today-badge{display:inline-block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary);margin-bottom:.5rem}.schedule-today-date{margin:0 0 .25rem;font-size:.95rem;color:var(--text-secondary)}.schedule-today-time{margin:0 0 1rem;font-size:1.15rem;font-weight:600}.schedule-today-btn{margin-top:.25rem}.schedule-week-section{margin-bottom:0}.schedule-week-skeleton,.schedule-week-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem}.schedule-day-card{padding:1rem;text-align:center}.schedule-day-card--video{border-left:3px solid var(--success)}.schedule-day-card--live{border-left:3px solid var(--info)}.schedule-day-card--today{box-shadow:0 0 0 2px var(--accent)}.schedule-day-name{display:block;font-size:.9rem;font-weight:600;margin-bottom:.25rem}.schedule-day-date{display:block;font-size:.8rem;color:var(--text-muted);margin-bottom:.35rem}.schedule-day-kind{display:inline-block;font-size:.75rem;padding:.2rem .5rem;border-radius:4px;background:var(--bg-card-hover);color:var(--text-secondary)}.schedule-error{color:#e05a40;margin:0}.lessons-layout{display:flex;min-height:calc(100vh - 120px);padding:0}.lessons-sidebar{width:280px;min-width:280px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border-subtle);padding:1rem 0;overflow-y:auto;box-shadow:2px 0 12px #00000026}.lessons-sidebar-title{font-family:var(--font-display);font-size:1rem;font-weight:700;margin:0 1rem .75rem;color:var(--text-primary)}.lessons-sidebar-list{list-style:none;padding:0 .5rem;margin:0}.lessons-sidebar-list .skeleton{margin-bottom:.5rem;border-radius:var(--radius-sm)}.lessons-sidebar-link{display:block;padding:.6rem .75rem;margin-bottom:.2rem;border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none;transition:background var(--transition),color var(--transition),box-shadow var(--transition)}.lessons-sidebar-link:hover{background:var(--bg-card);color:var(--text-primary);box-shadow:var(--shadow-sm)}.lessons-sidebar-link--active{background:var(--accent-muted);color:var(--accent);font-weight:500;border-left:3px solid var(--accent);padding-left:calc(.75rem - 3px)}.lessons-sidebar-link-date{display:block;font-size:.75rem;color:var(--text-muted);margin-bottom:.2rem}.lessons-sidebar-link-title{font-size:.9rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lessons-sidebar-empty{margin:1rem;padding:1rem .85rem;font-size:.9rem;color:var(--text-muted);background:var(--bg-card);border:1px dashed var(--border-muted);border-radius:var(--radius-sm);text-align:center}.lessons-main{flex:1;min-width:0;overflow-y:auto;padding:1.25rem 1.5rem}@media(max-width:768px){.lessons-layout{flex-direction:column}.lessons-sidebar{width:100%;min-width:0;border-right:none;border-bottom:1px solid var(--border-subtle);max-height:200px}.lessons-sidebar-list{display:flex;flex-wrap:nowrap;overflow-x:auto;padding-bottom:.5rem;gap:.5rem}.lessons-sidebar-list li{flex-shrink:0}.lessons-sidebar-link{min-width:160px}}.lessons-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:360px;text-align:center;padding:2.5rem 2rem;animation:placeholderIn .4s ease}.lessons-placeholder-card{max-width:320px;padding:2.5rem 2rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition)}.lessons-placeholder-card:hover{box-shadow:var(--shadow-md)}.lessons-placeholder-icon-wrap{width:72px;height:72px;margin:0 auto 1.25rem;display:flex;align-items:center;justify-content:center;background:var(--accent-muted);border-radius:50%;font-size:2.25rem}.lessons-placeholder p{margin:0;font-size:1.05rem;color:var(--text-secondary);line-height:1.5}.lesson-detail{padding:1.5rem 0 3rem}.lesson-detail--panel{padding:0 0 1.5rem;min-height:0}.lesson-toolbar{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:nowrap;margin-bottom:.6rem;padding-bottom:.6rem;border-bottom:1px solid var(--border-subtle);min-height:0}.lesson-toolbar-info{min-width:0;flex:1}.lesson-toolbar-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.lesson-detail-title{font-family:var(--font-display);font-size:1.1rem;font-weight:700;margin:0;color:var(--text-primary);line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-detail-meta{display:block;font-size:.8rem;color:var(--text-muted);margin-top:.1rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-detail-external{flex-shrink:0;padding:.45rem .85rem;font-size:.9rem}.lesson-detail-video-wrap{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:var(--radius-md);background:var(--bg-secondary);border:1px solid var(--border-subtle);box-shadow:var(--shadow-sm)}.lesson-detail-video-wrap iframe,.lesson-detail-video-wrap video{position:absolute;top:0;left:0;width:100%;height:100%}.lesson-detail-no-media{color:var(--text-muted);margin:1rem 0 0;font-size:.95rem}.lesson-detail-error{color:var(--accent-hover);margin:0}.lesson-materials{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border-subtle)}.lesson-materials-title{font-size:.95rem;font-weight:600;color:var(--text-primary);margin:0 0 .5rem}.lesson-materials-list{list-style:none;padding:0;margin:0 0 .75rem}.lesson-materials-list li{margin-bottom:.35rem}.lesson-materials-list a{color:var(--accent);font-size:.9rem}.lesson-materials-list a:hover{color:var(--accent-hover)}.lesson-materials-hint{font-size:.85rem;color:var(--text-muted);font-style:italic}.lesson-materials-upload-label{cursor:pointer}.lesson-materials-upload-err{margin:.5rem 0 0;color:var(--accent-hover);font-size:.9rem}.lesson-materials-btn-inline{background:none;border:none;padding:0;font-size:inherit;font-family:inherit;color:var(--accent);cursor:pointer;text-decoration:underline}.lesson-materials-btn-inline:hover{color:var(--accent-hover)}.lesson-materials-viewer{margin-top:1rem;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-secondary);border:1px solid var(--border-subtle)}.lesson-materials-viewer-header{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.5rem .75rem;background:var(--bg-card);border-bottom:1px solid var(--border-subtle)}.lesson-materials-viewer-title{font-size:.9rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-materials-viewer-close{flex-shrink:0;padding:.35rem .65rem;font-size:.85rem}.lesson-materials-pdf-wrap{min-height:50vh}.lesson-materials-pdf-iframe{display:block;width:100%;height:70vh;min-height:450px;border:none}.lesson-materials-tabs-wrap{margin-top:.5rem;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-secondary);border:1px solid var(--border-subtle)}.lesson-materials-tabs{display:flex;flex-wrap:wrap;gap:0;padding:.25rem .25rem 0;background:var(--bg-card);border-bottom:1px solid var(--border-subtle);overflow-x:auto;-webkit-overflow-scrolling:touch}.lesson-materials-tab{padding:.5rem .85rem;font-size:.9rem;font-family:inherit;color:var(--text-secondary);background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;transition:background var(--transition),color var(--transition)}.lesson-materials-tab:hover{color:var(--text-primary);background:var(--bg-secondary)}.lesson-materials-tab--active{color:var(--accent);font-weight:600;background:var(--bg-secondary);border-bottom:2px solid var(--accent);margin-bottom:-1px}.lesson-materials-tabpanels{min-height:200px}.lesson-materials-tabpanel{padding:0}.lesson-materials-tabpanel .lesson-materials-viewer-header{display:flex;align-items:center;justify-content:space-between;gap:.5rem;flex-wrap:wrap;padding:.5rem .75rem}.lesson-materials-viewer-actions{display:flex;gap:.75rem;flex-shrink:0}.lesson-materials-tab-link{font-size:.9rem;color:var(--accent);text-decoration:none}.lesson-materials-tab-link:hover{color:var(--accent-hover);text-decoration:underline}.lesson-materials-tab-download-only{padding:2rem .75rem;text-align:center}.lesson-materials-tab-download-only .lesson-materials-hint{margin-top:.75rem;display:block}.presentations-layout{display:flex;min-height:calc(100vh - 120px);padding:0}.presentations-sidebar{width:280px;min-width:280px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border-subtle);padding:1rem 0;overflow-y:auto;box-shadow:2px 0 12px #00000026}.presentations-sidebar-title{font-family:var(--font-display);font-size:1rem;font-weight:700;margin:0 1rem .75rem;color:var(--text-primary)}.presentations-sidebar-list{list-style:none;padding:0 .5rem;margin:0}.presentations-sidebar-list .skeleton{margin-bottom:.5rem;border-radius:var(--radius-sm)}.presentations-sidebar-link{display:block;padding:.65rem .75rem;margin-bottom:.25rem;border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none;transition:background var(--transition),color var(--transition)}.presentations-sidebar-link:hover{background:var(--bg-card);color:var(--text-primary)}.presentations-sidebar-link--active{background:var(--accent-muted);color:var(--accent);font-weight:500;border-left:3px solid var(--accent);padding-left:calc(.75rem - 3px)}.presentations-sidebar-link-date{display:block;font-size:.75rem;color:var(--text-muted);margin-bottom:.2rem}.presentations-sidebar-link-title{font-size:.9rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.presentations-sidebar-empty{margin:1rem;padding:1rem .85rem;font-size:.9rem;color:var(--text-muted);background:var(--bg-card);border:1px dashed var(--border-muted);border-radius:var(--radius-sm);text-align:center}.presentations-main{flex:1;min-width:0;overflow-y:auto;padding:1.25rem 1.5rem}@media(max-width:768px){.presentations-layout{flex-direction:column}.presentations-sidebar{width:100%;min-width:0;border-right:none;border-bottom:1px solid var(--border-subtle);max-height:200px}.presentations-sidebar-list{display:flex;flex-wrap:nowrap;overflow-x:auto;padding-bottom:.5rem;gap:.5rem}.presentations-sidebar-list li{flex-shrink:0}.presentations-sidebar-link{min-width:160px}}.presentations-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:360px;text-align:center;padding:2.5rem 2rem;animation:placeholderIn .4s ease}.presentations-placeholder-card{max-width:320px;padding:2.5rem 2rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.presentations-placeholder-icon-wrap{width:72px;height:72px;margin:0 auto 1.25rem;display:flex;align-items:center;justify-content:center;background:var(--accent-muted);border-radius:50%;font-size:2.25rem}.presentations-placeholder p{margin:0;font-size:1.05rem;color:var(--text-secondary);line-height:1.5}.presentation-view{padding:1.5rem 0 3rem;min-height:70vh}.presentation-view--panel{padding:0 0 1.5rem;min-height:0}.presentation-toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:.75rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-subtle);min-height:0}.presentation-toolbar-info{min-width:0;flex:1}.presentation-toolbar-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.presentation-view-title{font-family:var(--font-display);font-size:1.15rem;font-weight:700;margin:0;color:var(--text-primary);line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.presentation-view-meta{display:block;font-size:.8rem;color:var(--text-muted);margin-top:.15rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.presentation-view-download{display:inline-flex;flex-shrink:0;padding:.45rem .9rem;font-size:.9rem}.presentation-viewer-wrap{position:relative;background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);overflow:hidden;min-height:480px;box-shadow:var(--shadow-sm)}.presentation-view-notice{margin:0;padding:1rem 1.25rem;background:var(--info-muted);border-bottom:1px solid var(--border-subtle);font-size:.9rem;color:var(--text-secondary)}.presentation-viewer-iframe{display:block;width:100%;height:75vh;min-height:520px;border:none}.presentation-viewer-inline{width:100%;min-height:400px;background:var(--bg-secondary)}.presentation-viewer-inline canvas{max-width:100%;height:auto}.presentation-view-error{color:var(--accent-hover);margin:0 0 .75rem}@media(min-width:768px){.presentation-viewer-wrap{min-height:560px}}.homework-layout{display:flex;min-height:calc(100vh - 120px);padding:0}.homework-sidebar{width:280px;min-width:280px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border-subtle);padding:1rem 0;overflow-y:auto;box-shadow:2px 0 12px #00000026}.homework-sidebar-title{font-family:var(--font-display);font-size:1rem;font-weight:700;margin:0 1rem .75rem;color:var(--text-primary)}.homework-sidebar-list{list-style:none;padding:0 .5rem;margin:0}.homework-sidebar-list .skeleton{margin-bottom:.5rem;border-radius:var(--radius-sm)}.homework-sidebar-link{display:block;padding:.65rem .75rem;margin-bottom:.25rem;border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none;transition:background var(--transition),color var(--transition)}.homework-sidebar-link:hover{background:var(--bg-card);color:var(--text-primary)}.homework-sidebar-link--active{background:var(--accent-muted);color:var(--accent);font-weight:500;border-left:3px solid var(--accent);padding-left:calc(.75rem - 3px)}.homework-sidebar-link-date{display:block;font-size:.72rem;color:var(--text-muted);margin-bottom:.25rem;letter-spacing:.02em}.homework-sidebar-link-title{font-size:.9rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.homework-sidebar-empty{margin:1rem;padding:1rem .85rem;font-size:.9rem;color:var(--text-muted);background:var(--bg-card);border:1px dashed var(--border-muted);border-radius:var(--radius-sm);text-align:center}.homework-main{flex:1;min-width:0;overflow-y:auto;padding:1.5rem 1.75rem}@media(max-width:768px){.homework-layout{flex-direction:column}.homework-sidebar{width:100%;min-width:0;border-right:none;border-bottom:1px solid var(--border-subtle);max-height:200px}.homework-sidebar-list{display:flex;flex-wrap:nowrap;overflow-x:auto;padding-bottom:.5rem;gap:.5rem}.homework-sidebar-list li{flex-shrink:0}.homework-sidebar-link{min-width:160px}}.homework-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:360px;text-align:center;padding:2.5rem 2rem;animation:placeholderIn .4s ease}.homework-placeholder-card{max-width:320px;padding:2.5rem 2rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.homework-placeholder-icon-wrap{width:72px;height:72px;margin:0 auto 1.25rem;display:flex;align-items:center;justify-content:center;background:var(--accent-muted);border-radius:50%;font-size:2.25rem}.homework-placeholder p{margin:0;font-size:1.05rem;color:var(--text-secondary);line-height:1.5}.homework-detail{padding:1.5rem 0 3rem}.homework-detail--panel{padding:0 0 1.5rem;min-height:0}.homework-toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:.75rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-subtle)}.homework-toolbar-info{min-width:0;flex:1}.homework-toolbar-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.homework-detail-title{font-family:var(--font-display);font-size:1.15rem;font-weight:700;margin:0;color:var(--text-primary);line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.homework-detail-meta{display:block;font-size:.8rem;color:var(--text-muted);margin-top:.15rem}.homework-detail-body{margin-top:1rem}.homework-detail-desc{font-size:1rem;color:var(--text-secondary);line-height:1.65;white-space:pre-wrap;padding:.75rem 0}.homework-detail-no-desc{color:var(--text-muted);margin:0}.homework-detail-error{color:var(--accent-hover);margin:0}.homework-materials{margin-top:1.5rem;padding:1.25rem;background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-subtle);box-shadow:var(--shadow-sm)}.homework-materials-title{font-size:1rem;font-weight:600;color:var(--text-primary);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-subtle)}.homework-materials-viewer-actions{display:flex;align-items:center;gap:.75rem;flex-shrink:0}.homework-materials-tab-link{font-size:.9rem;color:var(--accent);text-decoration:none}.homework-materials-tab-link:hover{color:var(--accent-hover);text-decoration:underline}.homework-materials-tab-download-only{padding:2rem .75rem;text-align:center}.homework-materials-tab-download-only .homework-materials-hint{margin-top:.75rem;display:block}.homework-materials-tabs-wrap{margin-top:.25rem;border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-secondary);border:1px solid var(--border-subtle)}.homework-materials-tabs{display:flex;flex-wrap:wrap;gap:0;padding:.25rem .25rem 0;background:var(--bg-secondary);border-bottom:1px solid var(--border-subtle);overflow-x:auto;-webkit-overflow-scrolling:touch}.homework-materials-tab{padding:.5rem .85rem;font-size:.9rem;font-family:inherit;color:var(--text-secondary);background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;transition:background var(--transition),color var(--transition)}.homework-materials-tab:hover{color:var(--text-primary);background:var(--bg-card)}.homework-materials-tab--active{color:var(--accent);font-weight:600;background:var(--bg-card);border-bottom:2px solid var(--accent);margin-bottom:-1px}.homework-materials-tabpanels{min-height:200px}.homework-materials-tabpanel{padding:0}.homework-materials-tabpanel .homework-materials-viewer-header{display:flex;align-items:center;justify-content:space-between;gap:.5rem;flex-wrap:wrap;padding:.5rem .75rem}.homework-materials-list{list-style:none;padding:0;margin:0 0 .75rem}.homework-materials-list li{margin-bottom:.5rem;padding:.25rem 0}.homework-materials-list a{color:var(--accent);font-size:.9rem}.homework-materials-list a:hover{color:var(--accent-hover)}.homework-materials-hint{font-size:.85rem;color:var(--text-muted);font-style:italic}.homework-materials-upload{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border-subtle)}.homework-materials-upload-label{cursor:pointer}.homework-materials-upload-err{margin:.5rem 0 0;color:var(--accent-hover);font-size:.9rem}.homework-materials-btn-inline{background:none;border:none;padding:0;font-size:inherit;font-family:inherit;color:var(--accent);cursor:pointer;text-decoration:underline}.homework-materials-btn-inline:hover{color:var(--accent-hover)}.homework-materials-viewer{margin-top:1rem;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-secondary);border:1px solid var(--border-subtle)}.homework-materials-viewer-header{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.6rem .85rem;background:var(--bg-card);border-bottom:1px solid var(--border-subtle)}.homework-materials-viewer-title{font-size:.9rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.homework-materials-viewer-close{flex-shrink:0;padding:.35rem .65rem;font-size:.85rem}.homework-materials-pdf-wrap{min-height:50vh}.homework-materials-pdf-iframe{display:block;width:100%;height:70vh;min-height:450px;border:none}.darsliklar-layout{display:flex;min-height:calc(100vh - 120px);padding:0}.darsliklar-sidebar{width:280px;min-width:280px;flex-shrink:0;background:var(--bg-secondary);border-right:1px solid var(--border-subtle);padding:1rem 0;overflow-y:auto;box-shadow:2px 0 12px #00000026}.darsliklar-sidebar-title{font-family:var(--font-display);font-size:1rem;font-weight:700;margin:0 1rem .75rem;color:var(--text-primary)}.darsliklar-sidebar-list{list-style:none;padding:0 .5rem;margin:0}.darsliklar-sidebar-list .skeleton{margin-bottom:.5rem;border-radius:var(--radius-sm)}.darsliklar-sidebar-link{display:block;padding:.65rem .75rem;margin-bottom:.25rem;border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none;transition:background var(--transition),color var(--transition)}.darsliklar-sidebar-link:hover{background:var(--bg-card);color:var(--text-primary)}.darsliklar-sidebar-link--active{background:var(--accent-muted);color:var(--accent);font-weight:500;border-left:3px solid var(--accent);padding-left:calc(.75rem - 3px)}.darsliklar-sidebar-link-title{font-size:.9rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.darsliklar-sidebar-empty{margin:1rem;padding:1rem .85rem;font-size:.9rem;color:var(--text-muted);background:var(--bg-card);border:1px dashed var(--border-muted);border-radius:var(--radius-sm);text-align:center}.darsliklar-main{flex:1;min-width:0;overflow-y:auto;padding:1.25rem 1.5rem}@media(max-width:768px){.darsliklar-layout{flex-direction:column}.darsliklar-sidebar{width:100%;min-width:0;border-right:none;border-bottom:1px solid var(--border-subtle);max-height:200px}.darsliklar-sidebar-list{display:flex;flex-wrap:nowrap;overflow-x:auto;padding-bottom:.5rem;gap:.5rem}.darsliklar-sidebar-list li{flex-shrink:0}.darsliklar-sidebar-link{min-width:160px}}.darsliklar-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:360px;text-align:center;padding:2.5rem 2rem;animation:placeholderIn .4s ease}.darsliklar-placeholder-card{max-width:320px;padding:2.5rem 2rem;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition)}.darsliklar-placeholder-card:hover{box-shadow:var(--shadow-md)}.darsliklar-placeholder-icon-wrap{width:72px;height:72px;margin:0 auto 1.25rem;display:flex;align-items:center;justify-content:center;background:var(--accent-muted);border-radius:50%;font-size:2.25rem}.darsliklar-placeholder p{margin:0;font-size:1.05rem;color:var(--text-secondary);line-height:1.5}.darslik-detail{padding:1.5rem 0 3rem}.darslik-detail--panel{padding:0 0 1.5rem;min-height:0}.darslik-toolbar{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:nowrap;margin-bottom:.75rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-subtle)}.darslik-detail-title{font-family:var(--font-display);font-size:1.1rem;font-weight:700;margin:0;color:var(--text-primary);line-height:1.3;min-width:0;flex:1}.darslik-toolbar-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.darslik-detail-open{padding:.45rem .85rem;font-size:.9rem;background:var(--bg-card);border:1px solid var(--border-muted);border-radius:var(--radius-sm);color:var(--text-primary);text-decoration:none;transition:background var(--transition),border-color var(--transition)}.darslik-detail-open:hover{background:var(--bg-card-hover);border-color:var(--border-muted)}.darslik-detail-download{padding:.45rem .85rem;font-size:.9rem}.darslik-pdf-wrap{margin-top:1rem;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-secondary);border:1px solid var(--border-subtle);min-height:60vh}.darslik-pdf-iframe{display:block;width:100%;height:75vh;min-height:500px;border:none}.darslik-detail-open-hint{margin-top:1rem;font-size:.95rem;color:var(--text-muted)}.darslik-detail-open-hint a{color:var(--accent)}.darslik-detail-body{font-size:1rem;color:var(--text-secondary);line-height:1.6;white-space:pre-wrap}.darslik-detail-no-desc,.darslik-detail-no-file{color:var(--text-muted);margin:0 0 .5rem}.darslik-detail-error{color:var(--accent-hover);margin:0}.add-lesson-page{padding:1.5rem 0 3rem}.add-lesson-page .container{max-width:480px;margin:0 auto;padding:0 1.5rem}.add-lesson-page h1{margin:0 0 1.25rem;font-size:1.5rem;color:#e8e8e8}.add-lesson-form{display:flex;flex-direction:column;gap:1rem}.add-lesson-form label{display:flex;flex-direction:column;gap:.35rem;color:#bbb;font-size:.9rem}.add-lesson-form input,.add-lesson-form select,.add-lesson-form textarea{padding:.65rem .9rem;border:1px solid var(--border-muted);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:1rem;resize:vertical}.add-lesson-form textarea{min-height:80px}.add-lesson-form input[type=file]{padding:.5rem}.add-lesson-hint{display:block;margin-top:.4rem;font-size:.85rem;color:var(--text-muted);line-height:1.4}.add-lesson-form button{padding:.75rem;border:none;border-radius:8px;background:#e94560;color:#fff;font-size:1rem;font-weight:600;cursor:pointer;margin-top:.25rem}.add-lesson-form button:hover:not(:disabled){background:#ff6b6b}.add-lesson-form button:disabled{opacity:.7;cursor:not-allowed}.add-lesson-error{background:#e9456033;color:#ff6b6b;padding:.5rem .75rem;border-radius:6px;font-size:.9rem}.add-homework-page{padding:1.5rem 0 3rem}.add-homework-page .container{max-width:520px;margin:0 auto;padding:0 1.5rem}.add-homework-form{display:flex;flex-direction:column;gap:1rem}.add-homework-form label{display:flex;flex-direction:column;gap:.35rem;color:var(--text-muted);font-size:.9rem}.add-homework-form input,.add-homework-form textarea{padding:.65rem .9rem;border:1px solid var(--border-muted);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:1rem;resize:vertical}.add-homework-form textarea{min-height:120px}.add-homework-form button{padding:.75rem;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:1rem;font-weight:600;cursor:pointer;margin-top:.25rem}.add-homework-form button:hover:not(:disabled){background:var(--accent-hover)}.add-homework-form button:disabled{opacity:.7;cursor:not-allowed}.add-homework-hint{font-size:.85rem;color:var(--text-muted);margin-top:.25rem}.add-homework-files-preview{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.25rem}.add-homework-file-tag{font-size:.8rem;color:var(--text-secondary);background:var(--bg-card);padding:.25rem .5rem;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}.add-homework-error{background:var(--accent-muted);color:var(--accent-hover);padding:.55rem .85rem;border-radius:var(--radius-sm);font-size:.9rem}.add-darslik-page{padding:1.5rem 0 3rem}.add-darslik-page .container{max-width:520px;margin:0 auto;padding:0 1.5rem}.add-darslik-form{display:flex;flex-direction:column;gap:1rem}.add-darslik-form label{display:flex;flex-direction:column;gap:.35rem;color:var(--text-muted);font-size:.9rem}.add-darslik-form input,.add-darslik-form textarea{padding:.65rem .9rem;border:1px solid var(--border-muted);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:1rem;resize:vertical}.add-darslik-form textarea{min-height:100px}.add-darslik-form button{padding:.75rem;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:1rem;font-weight:600;cursor:pointer;margin-top:.25rem}.add-darslik-form button:hover:not(:disabled){background:var(--accent-hover)}.add-darslik-form button:disabled{opacity:.7;cursor:not-allowed}.add-darslik-hint{font-size:.85rem;color:var(--text-muted);margin-top:.25rem}.add-darslik-error{background:var(--accent-muted);color:var(--accent-hover);padding:.55rem .85rem;border-radius:var(--radius-sm);font-size:.9rem}.not-found{min-height:60vh;display:flex;align-items:center;justify-content:center;padding:2rem}.not-found-content{text-align:center;max-width:400px}.not-found-code{font-family:var(--font-display);font-size:4rem;font-weight:700;margin:0;color:var(--text-muted);letter-spacing:-.03em}.not-found-text{margin:.5rem 0 1.5rem;font-size:1.1rem;color:var(--text-secondary)}
