@import "https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,300;0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700;0,14..32,800;0,14..32,900;1,14..32,400&family=JetBrains+Mono:wght@400;500;600&display=swap";:root{--brand-primary:#6366f1;--brand-secondary:#4f46e5;--brand-accent:#818cf8;--brand-glow:#6366f126;--brand-300:#a5b4fc;--brand-400:#818cf8;--brand-500:#6366f1;--brand-600:#4f46e5;--violet-500:#8b5cf6;--bg-workspace:#fafafa;--bg-activity-bar:#f3f4f6;--bg-sidebar:#fff;--bg-editor:#fff;--stars-bg-color:#f0f2f8;--stars-dot-color:#505ab480;--stars-line-color:#505ab426;--bg-card:#fff;--bg-card-hover:#00000005;--border-subtle:#e5e7eb;--border-accent:#6366f1;--text-primary:#111827;--text-muted:#6b7280;--status-bar-bg:#f3f4f6;--status-bar-fg:#4b5563;--overlay-bg:#0000000d;--overlay-bg-hover:#00000014;--surface-raised:#fff;--surface-sunken:#f9fafb;--tooltip-bg:#111827;--tooltip-text:#fff;--badge-bg:#ef4444;--danger:#ef4444;--success:#10b981;--warning:#f59e0b;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--shadow-xs:0 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#818cf833;--danger:#f87171;--success:#34d399;--warning:#fbbf24;--primary:var(--brand-primary);--secondary:var(--brand-secondary);--accent:var(--brand-accent);--bg-main:var(--bg-editor);--bg-secondary:var(--bg-workspace);--bg-tertiary:var(--bg-sidebar);--text-main:var(--text-primary);--glass-bg:var(--bg-card);--glass-card-bg:var(--bg-card);--glass-border:var(--border-subtle);--glass-border-hover:var(--brand-primary);--glass-shadow:var(--shadow-sm);--card-shadow:var(--shadow-md);--dropdown-shadow:var(--shadow-lg);--gradient-glow1:var(--brand-glow)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%}body{background-color:var(--bg-workspace);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"ss01", "ss02", "cv01";transition:background-color .3s var(--ease-out), color .3s 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24px}.dropdown-menu{border-radius:var(--radius-md);overflow:hidden}.ts-page{background:var(--bg-main,var(--bg-editor));min-height:100vh;display:flex}.ts-main{color:var(--text-primary);flex:1;padding:40px 0 60px;overflow-y:auto}.ts-header{margin-bottom:32px;padding:0 40px}.ts-header__inner{align-items:center;gap:16px;margin-bottom:6px;display:flex}.ts-header__icon{background:linear-gradient(135deg,#6366f1,#7c3aed);border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;display:flex}.ts-header__title{color:var(--text-primary);margin:0;font-size:1.9rem;font-weight:800}.ts-header__subtitle{color:var(--text-muted);margin:0;font-size:.88rem}.ts-tabs{gap:4px;margin-bottom:36px;padding:0 40px;display:flex}.ts-tab{cursor:pointer;color:var(--text-muted);transition:var(--transition);white-space:nowrap;background:0 0;border:none;border-radius:12px;align-items:center;gap:10px;padding:10px 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var(--border-subtle);color:var(--text-primary);cursor:pointer;transition:var(--transition);border-radius:12px;align-items:center;gap:8px;padding:10px 20px;font-family:inherit;font-size:.9rem;font-weight:600;display:inline-flex}.ts-btn:hover{background:var(--overlay-bg-hover);border-color:var(--border-accent)}.ts-btn--primary{background:var(--brand-primary);color:#fff;box-shadow:0 2px 8px var(--brand-glow);border:none}.ts-btn--primary:hover{box-shadow:0 4px 15px var(--brand-glow);opacity:.92;color:#fff;transform:translateY(-1px)}.ts-btn--danger{color:var(--danger);background:#ea433514;border:1px solid #ea433533}.ts-btn--danger:hover{border-color:var(--danger);background:#ea433526}.ts-btn--ghost{background:0 0;border:none;padding:6px 8px}.ts-btn--ghost:hover{background:var(--overlay-bg);border:none}.ts-btn--sm{border-radius:8px;padding:5px 12px;font-size:.8rem}.ts-btn--xs{border-radius:6px;padding:3px 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var(--border-subtle);border-top-color:var(--brand-primary);border-radius:50%;width:16px;height:16px;animation:.8s linear infinite ts-spin}.ts-spinner--white{border-color:#fff #ffffff4d #ffffff4d}.ts-empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:80px 40px;display:flex}.ts-empty__icon{background:var(--overlay-bg);border:1px solid 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.ts-lesson-row__title{color:var(--brand-primary);font-weight:700}.ts-lesson-row__subtitle{color:var(--text-muted);font-size:.68rem}.ts-lesson-row__delete{color:var(--danger);cursor:pointer;opacity:0;background:0 0;border:none;align-items:center;padding:3px;transition:opacity .15s;display:flex}.ts-lesson-row:hover .ts-lesson-row__delete{opacity:1}.ts-lesson-row__grip{color:var(--text-muted);opacity:.4;cursor:grab;flex-shrink:0}.ts-add-lesson-btn{width:calc(100% - 24px);color:var(--brand-primary);border:1px dashed var(--border-accent);cursor:pointer;transition:var(--transition);background:0 0;border-radius:8px;justify-content:center;align-items:center;gap:6px;margin:6px 12px;padding:8px;font-family:inherit;font-size:.78rem;font-weight:600;display:flex}.ts-add-lesson-btn:hover{background:var(--brand-glow)}.ts-add-lesson-form{background:var(--brand-glow);border:1px solid var(--border-accent);border-radius:10px;margin:4px 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