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4px;letter-spacing:.06em;text-transform:uppercase}.side-menu{display:flex;flex-direction:column;gap:4px;padding:0 4px}.side-menu-compact{padding-bottom:0}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;font-family:var(--font-school);font-size:15.5px;line-height:1.35;color:var(--nav-text);text-decoration:none;cursor:pointer;transition:background-color .15s ease,color .15s ease}.nav-item:hover{background:var(--nav-hover-bg);color:var(--nav-hover-text)}.nav-item.active{background:var(--nav-active-bg);color:var(--nav-active-text);font-weight:500}.nav-item-accent{margin:2px 4px 10px;padding:10px;background:#2f8f65;box-shadow:0 6px 16px #2f8f6533;color:#fff;font-weight:700}.nav-item-accent:hover,.nav-item-accent.active{background:#277a57;color:#fff}.nav-item-accent:focus-visible{outline:2px solid rgba(47,143,101,.38);outline-offset:3px}.nav-icon{display:block;width:19px;height:19px;overflow:visible}.nav-icon-frame{display:grid;place-items:center;width:30px;height:30px;flex:0 0 30px;color:var(--nav-text-muted);background:color-mix(in srgb,currentColor 5%,transparent);border:1px solid color-mix(in srgb,currentColor 8%,transparent);border-radius:8px;transition:color .15s ease,background-color .15s ease,border-color .15s ease,transform .15s ease}.nav-item:hover .nav-icon-frame{color:var(--nav-hover-text);background:color-mix(in srgb,var(--nav-hover-text) 7%,transparent);border-color:color-mix(in srgb,var(--nav-hover-text) 10%,transparent)}.nav-item.active .nav-icon-frame{color:var(--nav-active-text);background:color-mix(in srgb,var(--nav-active-text) 9%,transparent);border-color:color-mix(in srgb,var(--nav-active-text) 13%,transparent)}.nav-item-accent .nav-icon-frame{color:#fff;background:#ffffff24;border-color:#fff3}.nav-item-accent:hover .nav-icon-frame,.nav-item-accent.active .nav-icon-frame{color:#fff;background:#fff3;border-color:#ffffff47}.nav-item:hover .nav-icon-frame{transform:translateY(-1px)}button.nav-item{border:none;background:transparent;width:100%;text-align:left;font-family:inherit;font-size:inherit;color:inherit}.nav-item__label{flex-shrink:0;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--nav-text-muted);min-width:2.75rem}.nav-item.active .nav-item__label{color:var(--nav-text-muted)}.nav-item .nav-item__label--lesson,.nav-item.active .nav-item__label--lesson{min-width:3.5rem;padding:3px 7px;color:#535dbd;text-align:center;background:#f0f1ff;border:1px solid #d7dbf4;border-radius:999px}.nav-item .nav-item__label--exam,.nav-item.active .nav-item__label--exam{min-width:3.5rem;padding:3px 7px;color:#9a4d19;text-align:center;background:#fff2df;border:1px solid #f3d4aa;border-radius:999px}.nav-item__title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-item--locked{opacity:.45;cursor:not-allowed}.nav-item--locked:hover{background:transparent;color:var(--nav-text-muted)}.nav-item--locked.active{background:var(--nav-hover-bg);color:var(--nav-text-muted);opacity:.5}.course-content-sidebar{padding-inline:8px;overflow:hidden}.course-content-sidebar .logo-section{justify-content:center;padding-inline:0}.course-content-sidebar__brand{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;color:#24305e;text-decoration:none;transition:background-color .15s ease,transform .15s ease}.course-content-sidebar__brand:hover{background:var(--nav-hover-bg);transform:translateY(-1px)}.course-content-sidebar__brand:focus-visible{outline:2px solid color-mix(in srgb,#24305e 38%,transparent);outline-offset:2px}.course-content-sidebar__pencil{width:40px;height:40px;transform:rotate(3deg)}.course-content-sidebar__pencil-body{fill:#f4c96f;stroke:#24305e;stroke-width:2.2;stroke-linejoin:round}.course-content-sidebar__pencil-detail,.course-content-sidebar__pencil-tip{stroke:#24305e;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}.course-content-sidebar__pencil-tip{fill:#f3e6d2}.course-content-sidebar>.nav-label,.course-content-sidebar .sidebar-foot .nav-label{display:none}.course-content-sidebar__lesson-nav{position:relative;width:100%;flex-shrink:0}.course-content-sidebar__loading{display:flex;flex-direction:column;align-items:center;gap:8px;width:100%;padding:12px 0}.course-content-sidebar__loading-item{width:80px;height:52px;border-radius:10px}.course-content-sidebar__lesson-viewport{max-height:312px;overflow:hidden;scroll-behavior:smooth}.course-content-sidebar__lesson-nav:not(.course-content-sidebar__lesson-nav--expanded):after{content:"";position:absolute;right:0;bottom:32px;left:0;height:54px;pointer-events:none;background:linear-gradient(to bottom,transparent,var(--blended-sidebar-bg, #f4f1ec))}.course-content-sidebar__lesson-nav--expanded{display:flex;flex:1;flex-direction:column;min-height:0}.course-content-sidebar__lesson-nav--expanded .course-content-sidebar__lesson-viewport{flex:1;min-height:0;max-height:none;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:color-mix(in srgb,var(--nav-text-muted) 35%,transparent) transparent}.course-content-sidebar__lesson-viewport>.side-menu{align-items:center;gap:8px;width:100%;padding:12px 0}.course-content-sidebar__lesson-viewport>.side-menu .nav-item{position:relative;display:grid;place-items:center;gap:0;width:80px;min-height:52px;margin:0 auto;padding:6px;box-sizing:border-box;text-align:center}.course-content-sidebar__lesson-viewport>.side-menu .nav-item__label{display:grid;place-items:center;min-width:0;width:100%;min-height:34px;padding:8px 4px;font-size:12px;line-height:1;box-sizing:border-box}.course-content-sidebar__lesson-viewport>.side-menu .nav-item__title{display:none}.course-content-sidebar__lesson-viewport>.side-menu .nav-item>.nav-icon{position:absolute;top:2px;right:2px;width:14px;height:14px}.course-content-sidebar__expand{position:relative;z-index:1;display:grid;place-items:center;width:28px;height:28px;margin:2px auto 0;padding:0;border:1px solid color-mix(in srgb,var(--nav-text-muted) 20%,transparent);border-radius:50%;background:var(--blended-sidebar-bg, #f4f1ec);color:var(--nav-text-muted);cursor:pointer;transition:color .15s ease,background-color .15s ease,transform .2s ease}.course-content-sidebar__expand:hover{color:var(--nav-text);background:var(--nav-hover-bg)}.course-content-sidebar__expand:focus-visible{outline:2px solid color-mix(in srgb,#24305e 38%,transparent);outline-offset:2px}.course-content-sidebar__expand svg{width:18px;height:18px;transition:transform .2s ease}.course-content-sidebar__lesson-nav--expanded .course-content-sidebar__expand svg{transform:rotate(180deg)}.course-content-sidebar .sidebar-foot{padding-bottom:4px}.course-content-sidebar .sidebar-foot .side-menu{align-items:center;gap:6px;width:100%;padding-inline:0}.course-content-sidebar .sidebar-foot .nav-item{display:grid;place-items:center;gap:0;width:48px;height:48px;min-height:48px;margin:0 auto;padding:9px;font-size:0;box-sizing:border-box;text-align:center}.course-content-sidebar .sidebar-foot .nav-icon-frame{width:34px;height:34px;flex-basis:34px;margin:0}.course-content-sidebar .sidebar-foot .nav-icon{width:22px;height:22px}.course-content-sidebar .sidebar-foot .nav-item__title{display:none}.sidebar-foot{margin-top:auto;padding-bottom:12px;flex-shrink:0}.sidebar-foot .nav-label{padding-top:16px}.nav-item--profile{cursor:default}.nav-item--profile:hover{background:var(--nav-hover-bg);color:var(--nav-hover-text)}.nav-item--logout{color:#c65f5f}.nav-item--logout .nav-icon-frame{color:#c65f5f;background:#fff2f0;border-color:#f2d4d0}.nav-item--logout:hover{color:#a94747;background:#fff2f0}.nav-item--logout:hover .nav-icon-frame{color:#a94747;background:#fde7e4;border-color:#ecc3be}