:root{font-family: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}}:root{--primary-color: #007bff;--secondary-color: #6c757d;--background-color: #f8f9fa;--text-color: #212529;--white-color: #ffffff;--border-radius: 12px;--shadow: 0 4px 15px rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Noto Sans KR,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6;display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}#container{width:100%;max-width:900px;background:var(--white-color);border-radius:var(--border-radius);box-shadow:var(--shadow);overflow:hidden}header{background-color:var(--primary-color);color:var(--white-color);padding:30px;text-align:center}header h1{font-size:2.5rem;margin-bottom:10px}header .subtitle{font-size:1.1rem;opacity:.9}main{padding:30px}section{margin-bottom:40px;padding:20px;background:#fdfdfd;border:1px solid #eee;border-radius:var(--border-radius)}h2{font-size:1.8rem;margin-bottom:20px;color:var(--primary-color);padding-bottom:10px;border-bottom:2px solid #eee}.button-group{display:flex;flex-wrap:wrap;gap:15px}button,.file-upload-label{background-color:var(--primary-color);color:var(--white-color);border:none;padding:15px 25px;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer;transition:background-color .3s,transform .2s;text-align:center}button:hover,.file-upload-label:hover{background-color:#0056b3;transform:translateY(-2px)}button:disabled{background-color:var(--secondary-color);cursor:not-allowed;transform:none}button.active{background-color:#0056b3;box-shadow:inset 0 2px 4px #0003}.file-upload-label{display:inline-block}.video-container{position:relative;width:100%;max-width:640px;margin:0 auto;border-radius:var(--border-radius);overflow:hidden;box-shadow:0 4px 10px #0000001a}#video,#output-canvas{display:block;width:100%;height:auto;transform:scaleX(-1)}#output-canvas{position:absolute;top:0;left:0}#timer{font-size:3rem;font-weight:700;color:var(--primary-color);text-align:center;margin-top:20px}#realtime-feedback{width:100%;max-width:640px;margin:15px auto;padding:15px;background:#f1f3f5;border-radius:8px;text-align:center}#realtime-feedback p{font-size:1.1rem;margin:5px 0}#rep-counter{font-weight:700;color:var(--primary-color)}#live-feedback{font-weight:700;color:#dc3545}#result-text{background:#e9f5ff;padding:20px;border-radius:8px;margin-bottom:20px;border-left:5px solid var(--primary-color)}.score-container{display:flex;align-items:center;justify-content:center;gap:20px;margin-bottom:25px;padding:15px;background:var(--white-color);border-radius:10px}.score-emoji{font-size:4rem}.score-text h3{font-size:1.2rem;color:var(--secondary-color);margin-bottom:5px}.score-text p{font-size:2.5rem;font-weight:700;margin:0}.feedback-checklist h4{font-size:1.2rem;color:var(--text-color);margin-bottom:10px;border-bottom:1px solid #ddd;padding-bottom:5px}.feedback-checklist ul{list-style:none;padding:0}.feedback-checklist li{font-size:1.1rem;padding:10px 5px;display:flex;align-items:center;border-bottom:1px solid #f0f0f0}.check-emoji{margin-right:15px;font-size:1.5rem}.feedback-summary{text-align:center;font-size:1.1rem;padding:10px}#result-text p{margin-bottom:10px}.feedback-good{color:#28a745;font-weight:700}.feedback-ok{color:#fd7e14;font-weight:700}.feedback-bad{color:#dc3545;font-weight:700}footer{text-align:center;padding:20px;font-size:.9rem;color:var(--secondary-color);background-color:#f1f3f5}.hidden{display:none}@media(max-width:768px){header h1{font-size:2rem}main{padding:20px}.button-group{flex-direction:column}button,.file-upload-label{width:100%}}