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rgba(255,255,255,.08);z-index:200}.bottom-nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--sidebar-text);background:none;border:none;cursor:pointer;font-size:10px;font-weight:600;padding:8px 0;transition:color .15s;line-height:1}.bottom-nav-item.active{color:#fff}.bottom-nav-icon{font-size:22px;line-height:1}.show-mobile{display:flex!important}.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:18px}.year-tabs{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.year-tab{flex:1;justify-content:center;padding:8px 6px}.tab-label-full{display:none}.tab-label-short{display:inline}.grades-card{overflow-x:auto}.modal-overlay{align-items:flex-end;padding:0}.modal{border-radius:16px 16px 0 0;max-width:100%;padding:24px 20px 36px}}@media (max-width: 480px){.main-content{padding:12px 12px 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