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12px;font-size:12px;font-weight:800;display:inline-block}.exam-level-badge--beginner{color:#059669;background:#10b98126}.exam-level-badge--intermediate{color:#d97706;background:#f59e0b26}.exam-level-badge--advanced{color:#dc2626;background:#ef444426}@media (width<=768px){.filter-search-header__main{flex-direction:column;align-items:stretch}.results-indicator{border-top:1px solid var(--color-border);margin-left:0;padding-top:12px}}.empty-state{text-align:center;background:var(--color-bg-secondary);border-radius:var(--radius-xl);border:2px dashed var(--color-border);margin:32px 0;padding:64px 32px}.empty-state__icon{margin-bottom:16px;font-size:48px;display:block}.empty-state p{color:var(--color-text-secondary);margin-bottom:24px;font-size:16px}.group-badge{background:var(--color-bg-tertiary);color:var(--color-text-secondary);border-radius:50px;padding:2px 10px;font-size:12px;font-weight:600}.material-group-header{border-bottom:1px solid var(--color-border-light);align-items:center;gap:12px;margin-bottom:24px;padding-bottom:12px;display:flex}.material-group-header h2{color:var(--color-text-primary);margin:0;font-size:20px;font-weight:700}.material-card{border-radius:var(--radius-lg);height:100%;box-shadow:var(--shadow-sm);transition:all var(--transition-base);border:1px solid var(--color-border-light);background:#fff;flex-direction:column;display:flex;overflow:hidden}.material-card:hover{box-shadow:var(--shadow-md);border-color:var(--color-primary-light);transform:translateY(-4px)}.material-card__preview{background:var(--color-bg-tertiary);justify-content:center;align-items:center;height:140px;font-size:48px;display:flex;position:relative}.file-type-label{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);color:#fff;letter-spacing:.5px;background:#00000080;border-radius:4px;padding:2px 6px;font-size:10px;font-weight:800;position:absolute;top:12px;right:12px}.material-card__content{flex-direction:column;flex:1;padding:20px;display:flex}.material-card__title{color:var(--color-text-primary);margin-bottom:8px;font-size:16px;font-weight:700;line-height:1.4}.material-card__description{color:var(--color-text-secondary);flex:1;margin-bottom:20px;font-size:14px;line-height:1.6}.material-card__footer{border-top:1px solid var(--color-border-light);justify-content:space-between;align-items:center;padding-top:16px;display:flex}.material-date{color:var(--color-text-muted);font-size:12px}.loading-spinner-container{color:var(--color-text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:80px 0;display:flex}