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clamp(1rem, 1vw + .4rem, 1.125rem);--font-size-secondary-text: clamp(.875rem, .6vw + .3rem, .95rem);--font-size-label: clamp(.75rem, .5vw + .3rem, .875rem);--font-size-table: clamp(.85rem, .6vw + .35rem, .95rem);--font-size-button: clamp(.875rem, .6vw + .35rem, 1rem);--font-size-caption: clamp(.75rem, .5vw + .3rem, .85rem);--font-size-tiny: clamp(.65rem, .4vw + .25rem, .75rem);--line-height-tight: 1.2;--line-height-normal: 1.5;--line-height-loose: 1.8;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--shadow-card: 0 2px 6px rgba(0, 0, 0, .05)}body{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text-primary);margin:0;padding:0}:root{--login-primary: #0a2e5d;--login-accent: #e0591e;--login-text: #1e293b;--login-text-muted: #64748b;--login-bg-start: #0f172a;--login-bg-end: #1e293b;--glass-bg: rgba(255, 255, 255, .75);--glass-border: rgba(255, 255, 255, .5);--glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 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Toastify__bounceInUp{0%,60%,75%,90%,to{animation-timing-function:cubic-bezier(.215,.61,.355,1)}0%{opacity:0;transform:translate3d(0,3000px,0)}60%{opacity:1;transform:translate3d(0,-20px,0)}75%{transform:translate3d(0,10px,0)}90%{transform:translate3d(0,-5px,0)}to{transform:translateZ(0)}}@keyframes Toastify__bounceOutUp{20%{transform:translate3d(0,calc(var(--y) - 10px),0)}40%,45%{opacity:1;transform:translate3d(0,calc(var(--y) + 20px),0)}to{opacity:0;transform:translate3d(0,-2000px,0)}}@keyframes Toastify__bounceInDown{0%,60%,75%,90%,to{animation-timing-function:cubic-bezier(.215,.61,.355,1)}0%{opacity:0;transform:translate3d(0,-3000px,0)}60%{opacity:1;transform:translate3d(0,25px,0)}75%{transform:translate3d(0,-10px,0)}90%{transform:translate3d(0,5px,0)}to{transform:none}}@keyframes Toastify__bounceOutDown{20%{transform:translate3d(0,calc(var(--y) - 10px),0)}40%,45%{opacity:1;transform:translate3d(0,calc(var(--y) + 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Toastify__slideInLeft{0%{transform:translate3d(-110%,0,0);visibility:visible}to{transform:translate3d(0,var(--y),0)}}@keyframes Toastify__slideInUp{0%{transform:translate3d(0,110%,0);visibility:visible}to{transform:translate3d(0,var(--y),0)}}@keyframes Toastify__slideInDown{0%{transform:translate3d(0,-110%,0);visibility:visible}to{transform:translate3d(0,var(--y),0)}}@keyframes Toastify__slideOutRight{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(110%,var(--y),0)}}@keyframes Toastify__slideOutLeft{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(-110%,var(--y),0)}}@keyframes Toastify__slideOutDown{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(0,500px,0)}}@keyframes Toastify__slideOutUp{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(0,-500px,0)}}.Toastify__slide-enter--top-left,.Toastify__slide-enter--bottom-left{animation-name:Toastify__slideInLeft}.Toastify__slide-enter--top-right,.Toastify__slide-enter--bottom-right{animation-name:Toastify__slideInRight}.Toastify__slide-enter--top-center{animation-name:Toastify__slideInDown}.Toastify__slide-enter--bottom-center{animation-name:Toastify__slideInUp}.Toastify__slide-exit--top-left,.Toastify__slide-exit--bottom-left{animation-name:Toastify__slideOutLeft;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-right,.Toastify__slide-exit--bottom-right{animation-name:Toastify__slideOutRight;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-center{animation-name:Toastify__slideOutUp;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--bottom-center{animation-name:Toastify__slideOutDown;animation-timing-function:ease-in;animation-duration:.3s}@keyframes 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cubic-bezier(.4,0,.2,1);flex:1;opacity:1;visibility:visible}.sb-menu-badge{background:var(--color-accent);color:#fff;font-size:.7rem;padding:.15rem .5rem;border-radius:10px;font-weight:700;box-shadow:0 2px 5px #e0591e4d;transition:all .4s cubic-bezier(.4,0,.2,1);opacity:1;visibility:visible}.sb-footer{padding:1.5rem 1.25rem;border-top:1px solid rgba(10,46,93,.08)}.sb-user-profile{display:flex;align-items:center;gap:.85rem;cursor:pointer;padding:.5rem;border-radius:12px;transition:all .2s ease}.sb-user-profile:hover{background:#0a2e5d0a}.sb-user-avatar{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--color-primary),#1a4d8c);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;box-shadow:0 4px 10px #0a2e5d26}.sb-user-info{flex:1;min-width:0;transition:all .4s cubic-bezier(.4,0,.2,1);opacity:1;visibility:visible}.sb-user-name{font-size:.9rem;font-weight:700;color:var(--color-primary);margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sb-user-role{font-size:.75rem;color:var(--color-text-secondary)}.sb-main--desktop.sb-main--collapsed .sb-logo-text,.sb-main--desktop.sb-main--collapsed .sb-menu-label,.sb-main--desktop.sb-main--collapsed .sb-menu-badge,.sb-main--desktop.sb-main--collapsed .sb-user-info,.sb-main--desktop.sb-main--collapsed .sb-group-header{opacity:0!important;visibility:hidden!important;max-width:0!important;margin:0!important;padding:0!important;pointer-events:none!important}.sb-main--desktop.sb-main--collapsed .sb-group-header{height:0!important;margin-bottom:0!important}.sb-main--desktop.sb-main--collapsed .sb-menu-item{transform:translate(-5px)}.sb-main--desktop.sb-main--collapsed .sb-group{margin-bottom:0}.sb-main--desktop.sb-main--collapsed .sb-header{justify-content:center;padding:0 .75rem 1.5rem}.sb-main--desktop.sb-main--collapsed .sb-menu-link{justify-content:center;padding:.75rem}.sb-main--desktop.sb-main--collapsed .sb-menu-icon{margin-right:0}.sb-main--desktop.sb-main--collapsed .sb-footer{display:flex;justify-content:center;padding:1.5rem .5rem}.sb-main--desktop.sb-main--collapsed .sb-user-profile{justify-content:center}.sb-tooltip-global{position:fixed;background:var(--color-primary);color:#fff;padding:.6rem 1rem;border-radius:8px;font-size:.8rem;font-weight:600;z-index:2000;box-shadow:0 4px 20px #00000026;pointer-events:none;animation:tooltipIn .2s ease-out}.sb-tooltip-global:after{content:"";position:absolute;left:-6px;top:50%;transform:translateY(-50%);border:6px solid transparent;border-right-color:var(--color-primary)}@keyframes tooltipIn{0%{opacity:0;transform:translateY(-50%) translate(-10px)}to{opacity:1;transform:translateY(-50%) 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.notif-icon-circle.reminder{background:linear-gradient(135deg,#fef2f2,#fee2e2);box-shadow:0 2px 8px #ef44441f}.notif-card:not(.notif-card-unread) .notif-icon-circle.announcement{background:linear-gradient(135deg,#eef2ff,#e0e7ff);box-shadow:0 2px 8px #6366f11f}.notif-card:not(.notif-card-unread) .notif-icon-circle.default{background:linear-gradient(135deg,#eff6ff,#dbeafe);box-shadow:0 2px 8px #3b82f61f}.notif-icon{filter:drop-shadow(0 1px 2px rgba(0,0,0,.1))}.notif-card-unread .notif-icon.homework{color:#d97706}.notif-card-unread .notif-icon.grade{color:#059669}.notif-card-unread .notif-icon.reminder{color:#dc2626}.notif-card-unread .notif-icon.announcement{color:#6366f1}.notif-card-unread .notif-icon.default{color:#2563eb}.notif-card:not(.notif-card-unread) .notif-icon.homework{color:#ca8a04;opacity:.65}.notif-card:not(.notif-card-unread) .notif-icon.grade{color:#10b981;opacity:.65}.notif-card:not(.notif-card-unread) 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p{font-size:var(--font-size-primary-text);color:var(--color-text-secondary)}.course-details-error{text-align:center;padding:5rem 2rem;font-size:var(--font-size-primary-text);color:var(--color-text-secondary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.course-details-container{padding:1rem}.course-details-header-section{padding:1.25rem 1.5rem;border-radius:16px}.course-details-header-content{flex-direction:column;gap:1.5rem}.course-details-page-title{font-size:22px}.course-details-meta-section{width:100%}.meta-badge{flex:1;justify-content:center;min-width:120px}.course-tabs{padding:1rem 1.5rem}.course-tab-content{padding:1.5rem}.groups-grid,.teacher-grid{grid-template-columns:1fr}.group-stats{grid-template-columns:repeat(3,1fr)}.homework-header{flex-direction:column;align-items:flex-start}}@media(max-width:640px){.course-details-breadcrumb{display:none}.course-details-page-title{font-size:20px}.course-details-header-section{padding:1rem}.meta-badge{font-size:13px;padding:.625rem 1rem}}@media(max-width:480px){.course-back-button{padding:.5rem .75rem;font-size:13px}.meta-badge{min-width:100px;font-size:12px}}.about-overview-section{margin-bottom:2.5rem}.about-section-title{font-size:1.5rem;font-weight:800;color:var(--color-primary);margin:0 0 1.5rem;letter-spacing:-.02em}.about-info-cards-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.25rem;margin-bottom:2rem;margin-top:20px}.about-info-card{background:#fff;border:2px solid #f1f5f9;border-radius:16px;padding:1.25rem;display:flex;align-items:center;gap:1rem;transition:all .3s 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#0a2e5d40}.info-card-content{display:flex;flex-direction:column;gap:.25rem}.info-card-label{font-size:.8125rem;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:.05em}.info-card-value{font-size:1.25rem;font-weight:800;color:var(--color-primary);letter-spacing:-.01em}.about-description-card{background:#f8fafc;border:2px solid #f1f5f9;border-radius:16px;padding:1.75rem}.description-title{font-size:1.125rem;font-weight:700;color:var(--color-primary);margin:0 0 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.8rem;border-radius:100px}.db-session-type.online{background:#ecfdf5;color:#059669}.db-session-type.offline{background:#fef2f2;color:#dc2626}.db-subject-title{font-size:1.4rem;font-weight:900;color:var(--color-primary);margin-bottom:1rem;line-height:1.2}.db-session-meta{display:flex;flex-direction:column;gap:.6rem;margin-bottom:2rem}.db-meta-item{display:flex;align-items:center;gap:.6rem;font-size:.9rem;color:var(--color-text-secondary);font-weight:500}.db-card-actions{display:flex;gap:1rem}.db-action-btn{flex:1;border:none;padding:1rem;border-radius:18px;font-size:.9rem;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.6rem;transition:all .2s ease;text-decoration:none}.db-action-btn.primary-btn{background:var(--color-primary);color:#fff;margin:10px 0;width:100%}.dashboard-attendance-btn:hover,.dashboard-session-a:hover{background-image:linear-gradient(to right,#01011e 10%,#6e1111 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