:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}body{color:var(--tg-theme-text-color);background-color:var(--tg-theme-bg-color);margin:0;min-width:320px;min-height:100vh;max-width:100vw;max-height:100vh;overflow:hidden;touch-action:none;overscroll-behavior:none;display:block}#root{height:100vh;width:100vw;min-width:320px;min-height:100vh;background-color:var(--tg-theme-bg-color, rgba(159, 159, 159, .25))}.spinner{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);zIndex:1000}.container{height:100%;width:100%;display:flex;flex-direction:column;align-items:center}.search-input{width:80%;padding:10px;font-size:1rem;border:1px solid var(--tg-theme-hint-color);border-radius:8px;margin:10px 0 15px;background-color:var(--tg-theme-input-background)}.course-list,.lesson-list{display:flex;flex-direction:column;align-items:center;gap:5px;width:100%;max-height:90%;overflow-y:auto;scrollbar-width:none}.course-item,.lesson-item{width:90%;padding:15px;background-color:var(--tg-theme-button-color, oklch(.623 .214 259.815));color:var(--tg-theme-button-text-color);border:none;text-align:left;font-size:1rem;cursor:pointer;display:flex;flex-direction:column;gap:5px}.course-item-content{display:flex;align-items:center;gap:12px}.lesson-item.completed{background-color:var(--tg-theme-hint-color, #d3d3d3);color:var(--tg-theme-text-color, #000);opacity:.85}.lesson-item.disabled{color:#aaa;background-color:#aaaaaa7a;cursor:not-allowed;opacity:.6;pointer-events:none}.lesson-content{display:flex;justify-content:space-between;align-items:center;width:100%}.lesson-title{font-weight:500}.lesson-status{font-size:.85rem;color:var(--tg-theme-hint-color, #555)}.course-thumb{width:60px;height:60px;object-fit:cover;border-radius:6px;flex-shrink:0}.course-thumb.placeholder{width:60px;height:60px;border-radius:8px;display:flex;align-items:center;justify-content:center}.placeholder-icon{font-size:38px;color:#555;line-height:1}.course-text{display:flex;flex-direction:column;gap:4px;overflow:hidden}.course-title{font-size:1.2rem;font-weight:700}.course-description{font-size:.9rem;color:var(--tg-theme-description-color);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.course-preview{width:90%;max-width:400px;height:200px;object-fit:cover;border-radius:8px;margin:0 auto 12px;display:block}.course-header{position:relative;display:flex;align-items:center;justify-content:center;width:90%;margin-bottom:10px}.back-button{display:flex;align-items:center;justify-content:center;position:absolute;left:0;padding:10px;background-color:var(--tg-theme-secondary-bg-color, #353535);color:var(--tg-theme-text-color);border:none;border-radius:8px;font-size:1rem;cursor:pointer}.course-title{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;font-size:1.4rem;font-weight:700;text-align:start}.spinner{display:flex;justify-content:center;align-items:center;height:100vh}.author-footer{margin-top:auto;padding:10px 0;text-align:center;font-size:.85rem;color:#888;opacity:.6}