:root{--primary: #6366f1;--primary-hover: #4f46e5;--bg: #0f172a;--card-bg: rgba(255, 255, 255, .05);--text: #f8fafc;--text-muted: #94a3b8;--border: rgba(255, 255, 255, .1);--success: #10b981;--error: #ef4444}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}.container{max-width:1000px;margin:0 auto;padding:0 2rem}header{padding:4rem 0 2rem;text-align:center}header h1{font-size:3rem;font-weight:600;margin-bottom:.5rem}header h1 span{background:linear-gradient(135deg,#818cf8,#c084fc);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.subtitle{color:var(--text-muted);font-size:1.25rem;font-weight:300}main{padding:2rem 0}.card{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid 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.2s}#upload-btn{width:100%;padding:1rem;background:var(--primary);border:none;border-radius:.75rem;color:#fff;font-size:1.125rem;font-weight:600;margin-top:1rem;display:flex;align-items:center;justify-content:center;gap:.75rem}#upload-btn:hover{background:var(--primary-hover);transform:translateY(-1px)}#upload-btn:active{transform:translateY(0)}#upload-btn:disabled{opacity:.7;cursor:not-allowed}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}#refresh-btn{background:transparent;border:1px solid var(--border);color:var(--text-muted);padding:.5rem 1rem;border-radius:.5rem}#refresh-btn:hover{border-color:var(--text-muted);color:var(--text)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.score-card{background:var(--card-bg);border:1px solid var(--border);border-radius:1rem;padding:1.5rem;transition:all .3s 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.student-name{color:var(--text-muted);font-size:.875rem}.practice-btn{display:inline-block;margin-top:1rem;padding:.5rem 1rem;background:var(--primary);color:#fff;text-decoration:none;border-radius:.4rem;font-weight:600;font-size:.875rem}.text-btn{background:transparent;border:none;color:var(--primary);padding:0;font-weight:600;cursor:pointer;margin-bottom:1rem}.view-header{margin-bottom:2rem}.view-header h2{margin-bottom:.25rem}.detail-grid{display:grid;grid-template-columns:2fr 1fr;gap:2rem;margin-bottom:3rem}@media (max-width: 900px){.detail-grid{grid-template-columns:1fr}}.list-container{display:flex;flex-direction:column;gap:.75rem;margin-top:1rem}.list-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:#ffffff0d;border:1px solid var(--border);border-radius:.5rem}.list-item .info h4{margin:0;font-size:.95rem}.list-item .info p{margin:0;font-size:.8rem;color:var(--text-muted)}.list-container.compact .list-item{padding:.5rem 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