: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}}.practice-container{display:flex;flex-direction:column;align-items:center;padding:20px;gap:20px}.card{width:300px;min-height:200px;background:#fff;border-radius:10px;box-shadow:0 2px 10px #0000001a;cursor:pointer;perspective:1000px;transition:transform .3s ease}.card:hover{transform:translateY(-5px)}.card-content{padding:20px;text-align:center;display:flex;flex-direction:column;gap:20px}.card-front{font-size:24px;font-weight:700;color:#333}.card-back{font-size:20px;color:#666;border-top:1px solid #eee;padding-top:20px;margin-top:10px}.response-buttons{display:flex;gap:10px;margin-top:20px}.response-button{padding:10px 20px;border:none;border-radius:5px;cursor:pointer;font-weight:700;transition:background-color .2s}.response-button.hard{background-color:#ff4d4d;color:#fff}.response-button.ok{background-color:gold;color:#333}.response-button.easy{background-color:#4caf50;color:#fff}.response-button:hover{opacity:.9}.progress{color:#666;font-size:14px;margin-top:20px}#root{text-align:center;width:100%}.app{display:flex;flex-direction:column;min-height:100vh}main{padding:1rem;width:100%;max-width:1280px;margin:0 auto}.subtitle{color:var(--mui-palette-text-secondary);margin-top:-.5rem;margin-bottom:1rem;font-size:1rem}.camera-view{width:100%;max-width:600px;margin:0 auto}.video-container{background:#000;border-radius:8px;overflow:hidden;margin:20px 0}.error{color:var(--mui-palette-error-main);margin:16px 0;padding:12px 16px;background:var(--mui-palette-error-light);border-radius:8px;border:none;box-shadow:0 2px 8px rgba(var(--mui-palette-error-main),.15);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:all .3s ease}.nav-link{color:var(--mui-palette-common-white);text-decoration:none;font-weight:500;padding:8px 16px;border-radius:8px;transition:all .3s ease;display:inline-flex;align-items:center;white-space:nowrap;position:relative;overflow:hidden}.nav-link:hover{background:#ffffff26;transform:translateY(-1px)}.nav-link.active{background:#ffffff40;box-shadow:0 2px 8px #00000026}.settings{display:flex;align-items:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.translation-row{animation:fadeIn .5s ease-out backwards}