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768px){.dashboard{gap:1.5rem}.dashboard-stats{grid-template-columns:repeat(2,1fr);gap:1rem}.stat-card{padding:1.5rem}.stat-number{font-size:1.8rem}.progress-section{padding:1.5rem}.grid{grid-template-columns:1fr}.progress-details{flex-direction:column}}@media (max-width: 480px){.dashboard{gap:1.25rem}.dashboard-stats{grid-template-columns:1fr;gap:.75rem}.stat-card{padding:1.25rem}.stat-number{font-size:1.5rem}.stat-label{font-size:.85rem}.progress-section{padding:1rem}.progress-section h2{font-size:1.1rem;margin-bottom:1rem}.weeks-grid h2{font-size:1.1rem}}.user-auth-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#fff;display:flex;align-items:center;justify-content:center;z-index:1000;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.user-auth-modal{background:#fff;border-radius:16px;border:2px solid #667eea;box-shadow:0 8px 32px #667eea26,0 2px 8px #00000014;padding:40px;max-width:420px;width:90%;animation:slideUp .3s ease-out}@keyframes 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