.grammar-page{padding-top:var(--page-pad-top,120px);background:#f5eede;min-height:calc(100vh - 64px)}.grammar-layout{display:grid;grid-template-columns:280px 1fr;gap:0;min-height:calc(100vh - 64px)}.grammar-sidebar{border-right:1px solid rgba(61,87,100,.13);background:#faf4e6;padding:28px 0;overflow-y:auto;position:sticky;top:64px;height:calc(100vh - 64px)}.grammar-sidebar-header{padding:0 20px 20px;border-bottom:1px solid rgba(61,87,100,.13);margin-bottom:12px}.grammar-sidebar-title{font-family:var(--font-newsreader),serif;font-weight:500;font-size:20px;color:#2c424d;margin:0 0 4px}.grammar-sidebar-progress{font-size:12px;color:#6b7d87}.grammar-prog-bar{height:4px;background:#ecdfc1;border-radius:999px;margin-top:8px;overflow:hidden}.grammar-prog-fill{height:100%;background:#b48a3c;border-radius:999px;transition:width .3s}.grammar-level-section{margin-bottom:4px}.grammar-level-header{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;cursor:pointer;background:none;border:none;width:100%;text-align:left;font-family:inherit;transition:background .1s}.grammar-level-header:hover{background:#f5eede}.grammar-level-name{font-size:12px;font-weight:700;color:#3d5764;letter-spacing:.07em;text-transform:uppercase}.grammar-level-meta{display:flex;align-items:center;gap:7px}.grammar-level-count{font-size:11px;color:#6b7d87}.grammar-level-lessons{border-top:1px solid rgba(61,87,100,.13)}.grammar-lesson-btn{display:flex;align-items:center;gap:10px;padding:10px 20px 10px 28px;cursor:pointer;background:none;width:100%;text-align:left;font-family:inherit;border:none;border-bottom:1px solid rgba(61,87,100,.13);transition:background .1s;position:relative}.grammar-lesson-btn:last-child{border-bottom:none}.grammar-lesson-btn:hover:not(:disabled){background:#f5eede}.grammar-lesson-btn.active{background:rgba(180,138,60,.07)}.grammar-lesson-btn.active:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:#b48a3c;border-radius:0 2px 2px 0}.grammar-lesson-btn:disabled{opacity:.5;cursor:not-allowed}.grammar-lesson-icon{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:10px}.grammar-lesson-icon.done{background:#7aab7a;color:#fff}.grammar-lesson-icon.locked{background:#ece2cc;color:#9aa3aa}.grammar-lesson-icon.open{border:1.5px solid rgba(61,87,100,.22)}.grammar-lesson-title{font-size:12px;font-weight:600;color:#2c424d;line-height:1.3}.grammar-lesson-dur{font-size:10px;color:#6b7d87;margin-top:1px}.grammar-content{padding:40px 48px;background:#f5eede;overflow-y:auto}.grammar-content-inner{max-width:700px}.grammar-lesson-eyebrow{font-size:10px;letter-spacing:.27em;text-transform:uppercase;color:#8a6824;font-weight:700;margin-bottom:10px}.grammar-lesson-heading{font-family:var(--font-newsreader),serif;font-weight:500;font-size:32px;color:#3d5764;margin:0 0 6px;line-height:1.1}.grammar-lesson-header{margin-bottom:26px}.grammar-completed-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;background:#c5dcc5;color:#3d6b3d;font-size:11px;font-weight:700}.lesson-intro{font-size:15px;line-height:1.75;color:#6b7d87;margin-bottom:28px}.rule-block{background:#faf4e6;border:1px solid rgba(61,87,100,.13);border-radius:16px;padding:22px;margin-bottom:18px;box-shadow:0 8px 0 #ecdfc1}.rule-title{font-family:var(--font-newsreader),serif;font-weight:500;font-size:18px;color:#2c424d;margin:0 0 5px}.rule-text{font-size:13px;color:#6b7d87;margin:0 0 14px;line-height:1.6}.example-row{display:flex;align-items:center;gap:14px;background:#f5eede;border-radius:10px;padding:10px 14px;margin-bottom:7px}.example-heb{font-family:var(--font-frank-ruhl),serif;font-size:22px;color:#2c424d;min-width:100px}.example-tl{font-family:var(--font-newsreader),serif;font-style:italic;font-size:14px;color:#6b7d87;min-width:100px}.example-en{font-size:13px;color:#6b7d87}.tip-block{background:#fdf5db;border:1px solid #d9b974;border-radius:12px;padding:14px 18px;margin-bottom:24px;display:flex;gap:10px;align-items:flex-start}.tip-icon{font-size:16px;flex-shrink:0;margin-top:1px}.tip-text{font-size:13px;color:#2c424d;line-height:1.6}.tip-text strong{color:#8a6824}.exercise{background:#faf4e6;border:1px solid rgba(61,87,100,.13);border-radius:16px;padding:22px;margin-top:24px;box-shadow:0 8px 0 #ecdfc1}.exercise-label{font-size:11px;font-weight:700;color:#8a6824;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}.ex-q{font-size:14px;font-weight:600;color:#2c424d;margin-bottom:14px}.ex-opts{display:flex;flex-direction:column;gap:7px}.ex-opt{padding:10px 14px;border-radius:10px;border:1.5px solid rgba(61,87,100,.22);background:#faf4e6;cursor:pointer;font-size:13px;color:#2c424d;text-align:left;transition:all .12s;font-family:inherit}.ex-opt:hover{border-color:#d9b974;background:#fdf5db}.ex-opt.correct{border-color:#7aab7a;background:#c5dcc5;color:#3d6b3d;font-weight:600;cursor:default}.ex-opt.wrong{border-color:#bb8478;background:#ecd2cc;color:#bb8478;cursor:default}.ex-opt-letter{font-size:10px;opacity:.4;margin-right:7px}.ex-result{font-size:13px;margin-top:12px;padding:10px 14px;border-radius:10px;font-weight:600}.ex-result.correct{background:#c5dcc5;color:#3d6b3d;border:1px solid #7aab7a}.ex-result.wrong{background:#ecd2cc;color:#bb8478;border:1px solid #ddb9b0}.lesson-foot{display:flex;justify-content:space-between;align-items:center;margin-top:32px;padding-top:22px;border-top:1px solid rgba(61,87,100,.13)}.lesson-foot-note{font-size:13px;color:#6b7d87}.grammar-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;text-align:center}.grammar-empty-icon{font-size:48px;margin-bottom:16px}.grammar-empty-title{font-family:var(--font-newsreader),serif;font-weight:500;font-size:24px;color:#2c424d;margin:0 0 8px}.grammar-empty-copy{font-size:14px;color:#6b7d87;max-width:320px;line-height:1.6;margin:0}@media (max-width:900px){.grammar-layout{grid-template-columns:1fr}.grammar-sidebar{position:static;height:auto;border-right:none;border-bottom:1px solid rgba(61,87,100,.13)}.grammar-content{padding:28px 22px}}@media (max-width:600px){.grammar-content{padding:22px 14px}}