F6v2 GRAMMAR — Controls+Lesson Cards .grammar-controls{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}.reading-controls{margin-bottom:14px}.grammar-levels,.reading-levels{display:inline-flex;flex-wrap:wrap;gap:2px;background:var(--surface);border-radius:10px;border:1.5px solid var(--border);padding:3px}.gram-level-btn,.read-level-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 16px;border-radius:8px;border:none;background:none;color:var(--text2);font-size:13px;font-weight:600;cursor:pointer;transition:all .18s}.gram-level-btn.active,.read-level-btn.active{background:var(--primary);color:var(--on-accent)}.gram-level-btn:not(.active):hover,.read-level-btn:not(.active):hover{color:var(--text)}.lvl-lock{font-size:10px;opacity:.5;line-height:1}.gram-level-btn.active .lvl-lock,.read-level-btn.active .lvl-lock{opacity:.9}.is-pro .lvl-lock{display:none}.grammar-search{position:relative}#grammarSearch{width:100%;box-sizing:border-box;padding:9px 14px 9px 36px;border-radius:10px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;transition:border-color .15s}#grammarSearch:focus{outline:none;border-color:var(--primary)}.grammar-search:before{content:"🔍";position:absolute;left:12px;top:50%;transform:translateY(-50%);font-size:13px;pointer-events:none}.grammar-list{display:flex;flex-direction:column;gap:16px;padding-bottom:80px}.gram-lesson-header{margin-bottom:8px;padding:10px 14px;background:var(--surface);border-radius:10px;border:1px solid var(--border)}.gram-header-text{font-size:13px;font-weight:600;color:var(--text2);margin-bottom:8px}.gram-progress-bar{height:6px;border-radius:3px;background:var(--border)}.gram-progress-fill{height:100%;border-radius:3px;background:var(--primary);transition:width .4s}.grammar-card{background:var(--surface);border:1.5px solid var(--border);border-radius:14px;padding:18px;position:relative}.grammar-card.gram-done{border-color:var(--thuy-luc);opacity:.88}.gram-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}.gram-card-meta{display:flex;align-items:center;gap:8px}.gram-lesson-num{font-size:12px;color:var(--text2)}.gram-hsk-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;background:#e539351f;color:var(--primary)}.gram-done-badge{font-size:11px;font-weight:700;color:var(--thuy-luc);background:#22c55e1f;padding:2px 8px;border-radius:10px}.gram-pattern{font-size:22px;font-weight:700;color:var(--primary);margin-bottom:2px;display:block}.gram-name{font-size:14px;font-weight:600;margin-bottom:6px;display:block}.gram-explanation{font-size:13px;color:var(--text2);margin-bottom:12px}.gram-examples{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}.gram-example{background:#0000000a;border-radius:8px;padding:10px 12px}[data-theme=dark] .gram-example{background:#ffffff0a}.gram-zh{font-size:18px;margin-bottom:3px}.gram-py{font-size:12px;color:var(--primary);margin-bottom:2px}.gram-meaning{font-size:12px;color:var(--text2)}.gram-quiz-section{border-top:1px solid var(--border);margin-top:14px;padding-top:14px}.gram-quiz-label{font-size:12px;font-weight:600;color:var(--text2);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.gram-quiz-blank{font-size:15px;margin-bottom:4px}.gram-quiz-sub{font-size:11px;color:var(--text2);margin-bottom:10px}.gram-quiz-opts{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.gram-quiz-opt{padding:6px 14px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:15px;cursor:pointer;transition:all .15s}.gram-quiz-opt:hover:not([disabled]){border-color:var(--primary);color:var(--primary)}.gram-quiz-opt.correct{background:#22c55e26;border-color:var(--thuy-luc);color:var(--thuy-luc)}.gram-quiz-opt.wrong{background:#ef44441f;border-color:var(--chau-hong-3);color:var(--chau-hong-3)}.gram-quiz-opt[disabled]{cursor:default}.gram-drill-count{font-size:12px;color:var(--text2);margin-bottom:6px;font-weight:600}.gram-drill-fb{font-size:13px;line-height:1.5;margin-bottom:10px}.gram-drill-fb.ok{color:var(--thuy-luc)}.gram-drill-fb.no{color:var(--chau-hong-3)}.gram-drill-next,.gram-drill-retry{padding:7px 16px;border-radius:8px;border:1.5px solid var(--primary);background:var(--surface);color:var(--primary);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.gram-drill-next:hover,.gram-drill-retry:hover{background:var(--primary);color:var(--on-accent, #fff)}.gram-drill-result{text-align:center;padding:6px 0}.gram-drill-score{font-size:15px;font-weight:700;margin-bottom:10px;color:var(--text)}.gram-mark-btn{width:100%;padding:10px;border-radius:10px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;font-weight:600;cursor:pointer;margin-top:12px;transition:all .15s}.gram-mark-btn:hover:not([disabled]){border-color:var(--thuy-luc);color:var(--thuy-luc);background:#22c55e0f}.gram-mark-btn[disabled]{opacity:.6;cursor:default}.reading-list{display:flex;flex-direction:column;gap:12px;padding-bottom:80px}.reading-card{background:var(--surface);border:1.5px solid var(--border);border-radius:14px;padding:16px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:border-color .15s}.reading-card:hover{border-color:var(--primary)}.read-card-num{width:32px;height:32px;border-radius:50%;background:#e539351f;color:var(--primary);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.read-card-body{flex:1;min-width:0}.read-card-title{font-size:15px;font-weight:600;margin-bottom:4px}.read-card-meta{display:flex;gap:8px;align-items:center;margin-bottom:4px}.read-level-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;background:#e539351f;color:var(--primary)}.read-time{font-size:12px;color:var(--text2)}.read-card-preview{font-size:13px;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.read-card-arrow{color:var(--text2);flex-shrink:0}.reading-view{padding-bottom:80px}.read-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}.read-header h2{font-size:18px;font-weight:700}.read-listen-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px;padding:10px 14px;background:var(--surface);border-radius:12px;border:1px solid var(--border)}.read-listen-btn{padding:6px 14px;border-radius:8px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-size:13px;cursor:pointer;transition:border-color .15s,color .15s}.read-listen-btn:hover{border-color:var(--primary);color:var(--primary)}.read-speed-group{display:flex;align-items:center;gap:6px;margin-left:auto}.read-speed-label{font-size:12px;color:var(--text2)}.read-speed-btn{padding:4px 10px;border-radius:6px;border:1px solid var(--border);background:none;color:var(--text2);font-size:12px;cursor:pointer;transition:all .15s}.read-speed-btn.active{border-color:var(--primary);color:var(--primary);background:#e5393514}.read-passage{margin-bottom:20px}.read-sentence-row{display:flex;align-items:flex-start;gap:8px;padding:6px 0}.read-sentence-row.read-active{background:#ffeb3b14;border-radius:8px;padding:6px 8px;margin:0 -8px}.read-sent-play{background:none;border:none;color:var(--text2);cursor:pointer;font-size:12px;padding:4px 6px;border-radius:6px;flex-shrink:0;margin-top:6px;transition:background .15s,color .15s}.read-sent-play:hover{background:#e539351a;color:var(--primary)}.read-line{font-size:20px;line-height:1.9;flex:1}.read-pinyin-toggle{margin-top:8px}ruby{ruby-align:center;display:inline-ruby}rt{font-size:11px;color:var(--primary);line-height:1}.read-passage:not(.show-pinyin) rt{display:none}.read-questions{padding-top:16px;border-top:1px solid var(--border)}.read-questions h3{font-size:15px;font-weight:700;margin-bottom:12px}.read-question{margin-bottom:16px}.read-q-text{font-size:14px;font-weight:600;margin-bottom:8px}.read-options{display:flex;flex-wrap:wrap;gap:8px}.read-option{padding:7px 14px;border-radius:8px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;cursor:pointer;transition:all .15s}.read-option:hover:not([disabled]){border-color:var(--primary);color:var(--primary)}.read-option.correct{background:#22c55e26;border-color:var(--thuy-luc);color:var(--thuy-luc)}.read-option.wrong{background:#ef44441f;border-color:var(--chau-hong-3);color:var(--chau-hong-3)}.read-option[disabled]{cursor:default}.read-mode-tabs{display:flex;gap:8px;margin-bottom:14px}.read-mode-tab{padding:7px 18px;border-radius:20px;border:1.5px solid var(--border);background:var(--surface);color:var(--text2);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.read-mode-tab.active{border-color:var(--primary);color:var(--primary);background:#e5393514}.read-passage.read-hidden{display:none}.read-reveal-btn{display:block;width:100%;padding:10px;border-radius:10px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;font-weight:600;cursor:pointer;margin-top:16px;text-align:center;transition:all .15s}.read-reveal-btn:hover{border-color:var(--primary);color:var(--primary)}.gram-cautions{background:color-mix(in srgb,var(--warning) 9%,var(--surface));border:1px solid color-mix(in srgb,var(--warning) 32%,var(--border));border-left:3px solid var(--warning);border-radius:10px;padding:11px 14px;margin-bottom:14px}.gram-cautions-label{font-size:12px;font-weight:700;color:var(--warning-2, var(--warning));margin-bottom:8px;letter-spacing:.3px}.gram-caution{margin-bottom:10px}.gram-caution:last-child{margin-bottom:0}.gram-caution-note{font-size:13px;color:var(--text);line-height:1.5;margin-bottom:4px}.gram-caution-bad,.gram-caution-good{font-size:14px;line-height:1.5;display:flex;gap:6px;align-items:baseline}.gram-caution-bad{color:var(--text2);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--danger) 55%,transparent)}.gram-caution-good{color:var(--text)}.gram-caution .gc-mark{font-weight:700;flex-shrink:0;text-decoration:none;display:inline-block}.gram-caution-bad .gc-mark{color:var(--danger)}.gram-caution-good .gc-mark{color:var(--thuy-luc)}