.grammar-heading{margin:28px 0 18px}.grammar-heading h2{font-size:30px}.grammar-heading p{max-width:65ch;line-height:1.7}.grammar-metrics{grid-template-columns:repeat(4,minmax(0,1fr));margin:28px 0}.grammar-due,.grammar-sync-note{padding:22px;border:1px solid var(--study-line);border-radius:6px;background:#eaf0e5;margin:24px 0}.grammar-sync-note{line-height:1.7;background:#f2ecd9}.grammar-filters{display:grid;grid-template-columns:2fr 1fr 1.1fr 1.4fr;gap:16px;margin:32px 0 16px}.grammar-grid{margin:20px 0}.grammar-card h3{font-size:21px;line-height:1.4}.grammar-pattern{font-size:19px;line-height:1.7;color:var(--study-green);overflow-wrap:anywhere}.grammar-card .grammar-pattern{font-size:16px}.grammar-lesson{max-width:850px;margin:26px auto}.grammar-lesson>h2{font-size:clamp(28px,4vw,38px);line-height:1.3}.grammar-lesson>.grammar-pattern{font-size:clamp(22px,3vw,28px);border-left:4px solid var(--study-green);padding:10px 20px;background:#ebece1}.grammar-explanation{font-size:18px;line-height:1.85;white-space:pre-line;margin:30px 0}.grammar-example{border-bottom:1px solid var(--study-line);padding:18px 0}.grammar-example p{margin:6px 0;line-height:1.8}.grammar-chinese{font-size:27px;letter-spacing:.02em}.grammar-chinese a{text-decoration:none;color:inherit}.grammar-chinese a:hover,.grammar-chinese a:focus-visible{background:#f5e2a5}.grammar-pinyin{color:#5e6258}.grammar-vocabulary{margin:32px 0;padding:24px;border:1px solid var(--study-line);border-radius:6px}.grammar-vocabulary p{line-height:1.7}.grammar-full-article{margin:32px 0;border-block:1px solid var(--study-line);padding:20px 0;font-size:17px;line-height:1.85}.grammar-full-article summary{cursor:pointer;font-size:20px;font-weight:600;min-height:44px}.grammar-full-article h2{font-size:25px;margin:28px 0 12px}.grammar-full-article h3{font-size:22px}.grammar-full-article .pinyin,.grammar-full-article .trans,.grammar-full-article .expl{display:block}.grammar-full-article .pinyin{color:#53634e;font-size:.92em}.grammar-full-article .trans{color:#5e6258;margin-bottom:12px}.grammar-full-article .jiegou{font-size:21px;padding:18px;border-left:3px solid var(--study-green);background:#ebeee4}.grammar-full-article .liju{padding:16px 20px;background:#faf8f1;margin:18px 0;white-space:pre-line}.grammar-full-article .x{border-left:3px solid #94452f;padding-left:14px}.grammar-full-article .o{border-left:3px solid var(--study-green);padding-left:14px}.grammar-full-article table{display:block;overflow-x:auto;border-collapse:collapse;max-width:100%}.grammar-full-article td,.grammar-full-article th{padding:10px;border:1px solid var(--study-line)}.grammar-hide-pinyin .pinyin{display:none!important}.grammar-session{max-width:850px;margin:24px auto}.grammar-session .study-session-top span{display:block;color:var(--study-muted);margin-top:5px}.grammar-session .grammar-question h2{font-size:clamp(23px,3.2vw,32px);line-height:1.6;white-space:pre-line;overflow-wrap:anywhere}.grammar-choices{margin-bottom:22px}[data-study-app] .grammar-choices button[aria-pressed=true]{background:#e7ecd9;border:2px solid var(--study-green);color:#193d2d}.grammar-question form>button{margin-top:22px}.grammar-question input{max-width:100%}.grammar-hint{padding:18px 22px;background:#f4e8b6;border-left:4px solid #88722c;margin:22px 0;line-height:1.7}.grammar-feedback{margin:24px 0;line-height:1.8}.grammar-feedback strong{font-size:19px}.grammar-feedback:empty{display:none}.grammar-session .study-card-actions{margin-top:20px}.grammar-in-session [data-grammar-session]{display:block}.grammar-in-session [data-panel]{display:none!important}@media(max-width:760px){.grammar-filters{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-filters>label:first-child{grid-column:1/-1}.grammar-lesson{margin-top:22px}.grammar-session{padding:20px}.grammar-session .grammar-choices{grid-template-columns:1fr}.grammar-metrics{gap:16px}.grammar-metrics strong{font-size:28px}}@media(max-width:440px){.grammar-chinese{font-size:25px}.grammar-full-article{font-size:16px}.grammar-full-article .liju{padding:14px}.grammar-filters{gap:12px}.grammar-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-session .study-session-top{display:block}.grammar-session .study-session-controls{margin-top:12px}}

.grammar-word-help{margin:24px 0;padding:16px 20px;background:#eeeede;border:1px solid var(--study-line);line-height:1.7}.grammar-word-help summary{cursor:pointer;min-height:34px;font-weight:600}.grammar-word-help dl{margin:12px 0 0}.grammar-word-help dt{font-weight:600;margin-top:12px}.grammar-word-help dd{margin:2px 0 12px;color:var(--study-muted)}

.grammar-session .grammar-question form{display:block}.grammar-session form label{display:block;margin:24px 0 12px}.grammar-session form input{display:block;width:100%;margin-top:10px}.grammar-session .study-session-controls{display:flex;flex-wrap:wrap;max-width:none;gap:8px}.grammar-session .study-session-top{align-items:flex-start}.grammar-session [data-grammar-question]>.eyebrow{font-size:10px;margin:0 0 10px}.grammar-session .study-secondary{margin:14px 0 24px;line-height:1.7}

.grammar-metrics.study-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding-block:8px 20px}.grammar-heading p{margin:10px 0}.grammar-filters{margin-top:24px}@media(max-width:760px){.grammar-metrics.study-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}}