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.grid,html.mobile-preview .grid.two{grid-template-columns:1fr}html.mobile-preview .stats{grid-template-columns:repeat(2,1fr)}html.mobile-preview .attempt-layout{grid-template-columns:1fr}html.mobile-preview .record-card-h{grid-template-columns:1fr auto;grid-template-rows:auto auto;gap:12px}html.mobile-preview .record-card-h>.badge{grid-column:1;grid-row:1}html.mobile-preview .record-card-h>.record-info{grid-column:1/-1;grid-row:2}html.mobile-preview .record-card-h>.record-right{grid-column:2;grid-row:1;flex-direction:row;align-items:center;min-width:auto}html.mobile-preview .record-score{width:70px;height:36px;font-size:16px}html.mobile-preview .filters{grid-template-columns:1fr}html.mobile-preview .section{margin-top:20px}html.mobile-preview .section-header h1,html.mobile-preview .section-header h2{font-size:19px}html.mobile-preview .card{padding:14px}html.mobile-preview .button,html.mobile-preview .icon-button{min-height:46px}html.mobile-preview .question-title{font-size:17px;margin:12px 0}html.mobile-preview .auth-page{padding:24px 0 60px}html.mobile-preview .wrong-notes-filters .select{max-width:100%}html.mobile-preview .wrong-notes-count{margin-left:0}html.mobile-preview .auth-card{padding:24px 18px}.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;z-index:30;background:rgba(255,255,255,.97);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid rgba(229,231,235,.9);padding:0 0 env(safe-area-inset-bottom,0)}.bottom-nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;flex:1 1;height:56px;padding:0;border:none;background:none;cursor:pointer;color:#9ca3af;font-size:10px;font-weight:700;letter-spacing:.01em;-webkit-tap-highlight-color:transparent;transition:color .15s}.bottom-nav-item.active{color:var(--primary)}.bottom-nav-item span{line-height:1}.hero-cta{min-height:48px;padding:0 22px;font-size:15px}.hero-features{display:flex;flex-wrap:wrap;gap:16px;margin-top:20px;color:var(--muted);font-size:13px;font-weight:600}.hero-features span{display:flex;align-items:center;gap:5px;color:var(--muted)}.mock-exam-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.mock-choices{display:flex;flex-direction:column;gap:7px;margin-top:12px}.mock-choice{display:flex;align-items:center;gap:8px;padding:8px 10px;border:1.5px solid var(--line);border-radius:8px;background:white}.mock-choice.selected{border-color:var(--primary);background:var(--primary-light)}.mock-choice-num{display:grid;width:22px;height:22px;flex-shrink:0;place-items:center;border-radius:999px;background:var(--line-2);font-size:11px;font-weight:800;color:var(--muted)}.mock-choice.selected .mock-choice-num{background:var(--primary);color:white}@media (max-width:900px){.topbar{padding:0 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13px}.answer-grid{grid-template-columns:repeat(5,1fr);gap:6px}.answer-grid button{height:36px;font-size:12px}.section{margin-top:20px}.section-header h1,.section-header h2{font-size:19px}.card{padding:14px 16px}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}.filters{grid-template-columns:1fr}.tabs{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}.auth-page{padding:24px 0 60px}.auth-card{padding:24px 18px}.modal{padding:20px}.button,.icon-button{min-height:46px}}