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1.2rem;border-radius:.75rem;margin-bottom:1.5rem;text-align:center}.td-loading{display:flex;align-items:center;justify-content:center;gap:.8rem;padding:3rem;color:#00b4ffb3;font-size:1.05rem}.td-loading__spinner{width:22px;height:22px;border:3px solid rgba(0,180,255,.15);border-top-color:#00b4ffcc;border-radius:50%;animation:tdSpin .8s linear infinite}@keyframes tdSpin{to{transform:rotate(360deg)}}.td-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-bottom:2rem}.td-stat{background:#08122d99;border:1px solid rgba(0,180,255,.15);border-radius:1rem;padding:1.2rem;text-align:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:border-color .2s}.td-stat:hover{border-color:#00b4ff59}.td-stat--accent{border-color:#00b4ff59;background:#00b4ff0f}.td-stat__value{display:block;font-size:1.8rem;font-weight:800;color:#fff;line-height:1.1;margin-bottom:.3rem}.td-stat--accent .td-stat__value{background:linear-gradient(135deg,#0ea5e9,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.td-stat__label{font-size:.8rem;color:#ffffff80;text-transform:uppercase;letter-spacing:.05em;font-weight:600}.td-filters{display:flex;flex-wrap:wrap;gap:1rem;align-items:flex-end;margin-bottom:1.5rem;padding:1.2rem 1.5rem;background:#08122d80;border:1px solid rgba(0,180,255,.1);border-radius:1rem}.td-filter-group{display:flex;flex-direction:column;gap:.4rem;min-width:180px}.td-filter-group label{font-size:.8rem;font-weight:600;color:#ffffffb3}.td-filter-group select{background:#0003;border:1px solid rgba(0,180,255,.2);border-radius:.6rem;padding:.55rem 2rem .55rem .8rem;color:#fff;font-size:.9rem;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2300b4ff%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);background-repeat:no-repeat;background-position:right .7rem top 50%;background-size:.6rem auto;cursor:pointer}.td-filter-group select:focus{outline:none;border-color:#00b4ff80}.td-filter-group select option{background:#0c1a3d;color:#fff}.td-empty{text-align:center;padding:3rem 2rem;color:#ffffff80}.td-empty 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.7rem;border-radius:2rem;font-weight:700;font-size:.85rem}.score--high{background:#22c55e26;color:#4ade80;border:1px solid rgba(34,197,94,.3)}.score--mid{background:#f59e0b26;color:#fbbf24;border:1px solid rgba(245,158,11,.3)}.score--low{background:#e11d4826;color:#fb7185;border:1px solid rgba(225,29,72,.3)}@media (max-width: 768px){.teacher-dashboard{padding:1rem}.td-header{flex-direction:column;align-items:flex-start;padding:1.2rem}.td-header__actions{width:100%}.td-header__actions .td-btn{flex:1;text-align:center}.td-stats{grid-template-columns:repeat(2,1fr)}.td-filters{flex-direction:column}.td-filter-group{min-width:100%}}:root{--primary: #0a1628;--primary-mid: #0d2346;--electric: #00b4ff;--electric-dark: #0077cc;--electric-glow: rgba(0, 180, 255, .35);--neon-blue: #38bdf8;--indigo: #6366f1;--success: #22c55e;--error: #ef4444;--warning: #f59e0b;--glass-bg: rgba(10, 22, 50, .55);--glass-border: rgba(0, 180, 255, .25);--glass-shine: rgba(255, 255, 255, .08);--glass-blur: 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