.tablet-timer,.tablet-bottom-bar,.tablet-filter-bar{display:none}.tablet-timer{margin-bottom:4px}.tablet-timer .qb-timer-container{padding:12px 16px;margin-bottom:12px;flex-direction:row;align-items:center;justify-content:space-between;text-align:left;border-radius:12px}.tablet-timer .qb-timer-display{font-size:1.35rem}.tablet-timer .qb-timer-label{font-size:.75rem}.tablet-bottom-bar{position:fixed;left:0;right:0;bottom:0;z-index:90;align-items:stretch;justify-content:center;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom)) 16px;background:#fff;border-top:1px solid var(--color-line)}.tablet-bar-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:var(--radius-lg);border:1px solid var(--color-line);background:#fff;color:var(--color-body);font-size:15px;font-weight:600;cursor:pointer;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.tablet-bar-btn:hover{background:var(--color-surface);border-color:var(--color-subtle);color:var(--color-ink)}.tablet-bar-btn.active{background:var(--color-ink);border-color:var(--color-ink);color:#fff}.tablet-popup{position:fixed;left:16px;right:16px;bottom:calc(78px + env(safe-area-inset-bottom));z-index:100;width:auto;max-width:720px;max-height:calc(100dvh - 180px - env(safe-area-inset-bottom));margin:0 auto;background:#fff;border:1px solid var(--color-line);border-radius:var(--radius-card);box-shadow:0 8px 24px #0f172a1a;display:flex;flex-direction:column;overflow:hidden}.tablet-popup-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid #f1f5f9;background:#fff;flex-shrink:0}.tablet-popup-title{font-size:15px;font-weight:700;color:#0f172a;display:flex;align-items:center;gap:8px}.tablet-popup-close{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-md);border:none;background:#f1f5f9;color:var(--color-subtle);cursor:pointer;transition:background-color .15s ease,color .15s ease}.tablet-popup-close:hover{background:#e2e8f0;color:var(--color-ink)}.tablet-popup-body{flex:1;min-height:0;overflow:hidden;display:flex;flex-direction:column}.tablet-popup-footer{padding:14px 18px;border-top:1px solid #f1f5f9;background:#fff;flex-shrink:0}.tablet-popup .ai-chat-section{border:none!important;border-radius:0!important;margin:0!important;max-height:none!important;height:100%}.tablet-popup .qb-grid{max-height:none!important;padding:16px;justify-content:flex-start}.tablet-popup .qb-grid-btn{width:42px;height:42px;font-size:14px}.tablet-grid-filter-bar{margin-bottom:12px}.tablet-grid-filter-bar .filter-controls{margin:0}@media(min-width:768px)and (max-width:1024px){.qb-tablet-layout .qb-grid-wrap{display:flex!important;flex-direction:column!important;align-items:stretch!important;gap:16px!important;grid-template-columns:none!important;padding:16px 16px calc(96px + env(safe-area-inset-bottom)) 16px!important;background:#fff}.qb-tablet-layout .qb-column-main{width:100%;max-width:100%}.qb-tablet-layout .qb-column-side,.qb-tablet-layout .desktop-ai-chat{display:none!important}.qb-tablet-layout~.siteFooter--sticky{display:none!important}.qb-tablet-layout .mobile-topic-header{display:none!important}.qb-tablet-layout .qb-header-card .topic{display:block!important}.tablet-timer{display:block}.tablet-bottom-bar{display:flex}.tablet-filter-bar{display:block}.tablet-filter-bar .filter-controls{margin:0 0 16px}}@media(max-width:767px){.qb-compact .qb-grid-wrap{padding-bottom:calc(88px + env(safe-area-inset-bottom))!important}.qb-compact~.siteFooter--sticky{padding-bottom:calc(80px + env(safe-area-inset-bottom))}.qb-compact .qb-column-side,.qb-compact .qb-mobile-ai-bar{display:none!important}.qb-compact .tablet-timer{display:block}.qb-compact .tablet-timer .qb-timer-container{padding:10px 14px;margin-bottom:8px}.qb-compact .tablet-timer .qb-timer-display{font-size:1.15rem}.qb-compact .tablet-bottom-bar{display:flex;gap:8px;padding:8px 12px calc(8px + env(safe-area-inset-bottom)) 12px}.qb-compact .tablet-bar-btn{gap:8px;padding:10px 12px;font-size:14px}.qb-compact .tablet-popup{left:12px;right:12px;bottom:calc(70px + env(safe-area-inset-bottom));max-height:calc(100dvh - 150px - env(safe-area-inset-bottom))}}