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768px){.admin-students-stats{padding:10px}.page-header{flex-direction:column;gap:20px;text-align:center}.overall-stats{justify-content:center}.students-grid{grid-template-columns:1fr}.student-card{padding:20px}.stats-grid{grid-template-columns:repeat(2,1fr)}}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}.number-controls{display:flex;gap:8px;margin-top:8px}.number-btn{width:32px;height:32px;border:1px solid var(--border);border-radius:6px;background:var(--panel-2);color:var(--text);font-size:16px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.number-btn:hover{border-color:var(--accent);background:var(--panel);transform:translateY(-1px);box-shadow:0 2px 8px #3f888f33}.loading-placeholder{display:flex;align-items:center;gap:12px;padding:16px;background:var(--panel-2);border:1px solid 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