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.card-checkbox{border-color:var(--brand-primary);background-color:var(--brand-primary)}.card-checkbox svg{color:#fff;width:12px;height:12px;stroke-width:3}.star-popup-card{background:#fff;border-radius:var(--border-radius-lg);max-width:450px;width:100%;box-shadow:0 24px 48px -12px rgba(0,0,0,.2);overflow:hidden;position:relative;display:flex;flex-direction:column;padding:32px 24px 24px;text-align:center;align-items:center;gap:16px;animation:modalSlideUp .3s cubic-bezier(.34,1.56,.64,1)}.star-popup-title{font-size:1.3rem;font-weight:600;color:var(--text-primary)}.star-popup-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.5}.star-popup-btn{background:linear-gradient(135deg,#24292e,#0b57d0);color:#fff;padding:12px 28px;border-radius:24px;font-weight:600;font-size:.95rem;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .25s ease;text-decoration:none;box-shadow:0 4px 15px rgba(11,87,208,.3);margin-top:8px}.star-popup-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(11,87,208,.4)}.ghost-close-btn{position:absolute;top:12px;right:12px;background:transparent;border:none;cursor:pointer;padding:6px;display:flex;align-items:center;justify-content:center;opacity:.18;transition:opacity var(--transition-fast)}.ghost-close-btn:hover{opacity:.45}.ghost-close-btn svg{width:14px;height:14px;color:var(--text-secondary)}@media (max-width:768px){.app-container{flex-direction:column}.sidebar{position:fixed;top:64px;left:0;bottom:0;width:256px;z-index:80;box-shadow:10px 0 20px rgba(0,0,0,.05);background-color:#fff;transform:translateX(-100%);transition:transform var(--transition-normal)}.sidebar.open{transform:translateX(0);width:256px;padding:16px;border-right:1px solid var(--border-light)}.sidebar.collapsed{transform:translateX(-100%);width:256px;padding:16px}.main-layout{max-height:calc(100vh - 64px);width:100%}.header{width:100%;padding:0 16px}.search-bar-container{max-width:180px}.content-body{padding:16px}.path-bar,.toolbar{flex-direction:column;align-items:flex-start;gap:12px}.toolbar-right{width:100%;justify-content:space-between}.media-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}.modal-card{max-height:calc(100vh - 32px);width:100%;margin:8px}.lightbox-video{height:250px!important}.guidelines-card,.star-popup-card{padding:20px 16px 16px;max-height:calc(100vh - 40px)}.github-banner{align-items:stretch;text-align:center;gap:12px}.github-banner,.github-banner-info{flex-direction:column}.upload-drawer{width:calc(100% - 32px);left:16px;bottom:16px;right:16px}}