:root[data-theme=dark]{--bg: #0b1020;--bg-elev: #111733;--bg-elev-2: #182040;--panel: #0f1530;--border: #232b53;--text: #e6e9f2;--text-dim: #9aa3c7;--accent: #7c8cff;--accent-strong: #5e74ff;--success: #34d399;--warning: #f59e0b;--danger: #ef4444;--code-bg: #0c1226;--shadow: 0 8px 30px rgba(0, 0, 0, .35)}:root[data-theme=light]{--bg: #dee2ec;--bg-elev: #e8ebf3;--bg-elev-2: #eef1f7;--panel: #e8ebf3;--border: #c8cdd9;--text: #232739;--text-dim: #5d6480;--accent: #4f5dff;--accent-strong: #3a48e6;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--code-bg: #e2e6ee;--shadow: 0 6px 20px rgba(20, 24, 60, .06)}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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var(--border);border-radius:10px;padding:0 8px}.lesson-search>svg{color:var(--text-dim);flex-shrink:0}.lesson-search input{flex:1;background:transparent;border:0;outline:0;color:var(--text);font:inherit;font-size:13px;padding:8px 4px;min-width:0}.lesson-search input::-webkit-search-cancel-button{display:none}.icon-btn-mini{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:6px;background:transparent;color:var(--text-dim);border:0;cursor:pointer}.icon-btn-mini:hover{background:var(--bg-elev);color:var(--text)}.lesson-content-host{flex:1 1 auto;overflow-y:auto;padding:14px 16px 8px;scroll-behavior:smooth}.lesson-content{font-size:14px;line-height:1.65;color:var(--text)}.lesson-content p{margin:0 0 10px}.lesson-content ul,.lesson-content ol{margin:0 0 12px;padding-left:22px}.lesson-content li{margin-bottom:4px}.lesson-content em{color:var(--text-dim);font-style:italic}.lesson-content strong{color:var(--text)}.lesson-content code{background:var(--code-bg);border:1px solid var(--border);padding:1px 5px;border-radius:4px;font-family:JetBrains Mono,ui-monospace,monospace;font-size:12.5px;color:var(--accent)}.lesson-content pre{background:var(--code-bg);border:1px solid var(--border);padding:10px 12px;border-radius:8px;overflow-x:auto;margin:8px 0 12px}.lesson-content pre code{background:transparent;border:0;padding:0;color:var(--text);font-size:12px;line-height:1.5;white-space:pre}.lesson-pagination{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 14px;border-top:1px solid var(--border);flex:0 0 auto}.lesson-page-info{font-size:12px;color:var(--text-dim);font-variant-numeric:tabular-nums}.lesson-pagination .btn[disabled]{opacity:.4}.lesson-results{flex:1 1 auto;overflow-y:auto;padding:12px 14px}.lesson-results-count{font-size:12px;color:var(--text-dim);margin:0 0 10px}.lesson-results-list{list-style:none;margin:0;padding:0}.lesson-results-list li{padding:10px 12px;border:1px solid var(--border);background:var(--bg-elev-2);border-radius:10px;margin-bottom:8px;cursor:pointer;transition:border-color .12s,background .12s}.lesson-results-list li:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--bg-elev-2))}.lesson-results-list .r-head{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}.lesson-results-list .r-stage{font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--accent);font-weight:600}.lesson-results-list .r-page{font-size:13px;font-weight:600}.lesson-results-list .r-snippet{font-size:12.5px;color:var(--text-dim);line-height:1.45}.lesson-results-list mark{background:color-mix(in srgb,var(--accent) 35%,transparent);color:var(--text);border-radius:3px;padding:0 2px}.lesson-empty{font-size:13px;color:var(--text-dim)}.app-grid.lesson-visible~.topnav .lesson-toggle,.lesson-toggle.is-active{background:color-mix(in srgb,var(--accent) 18%,transparent);border-color:color-mix(in srgb,var(--accent) 30%,transparent);color:var(--accent)}