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var(--border-color);border-top:3px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.login-section{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.login-container{background:var(--surface-color);padding:2rem;border-radius:1rem;box-shadow:var(--shadow-lg);width:100%;max-width:400px}.login-header{text-align:center;margin-bottom:2rem}.login-header h1{font-size:1.875rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.login-header p{color:var(--text-secondary);font-size:.875rem}.auth-tabs{display:flex;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color)}.auth-tab{flex:1;padding:.75rem;background:none;border:none;cursor:pointer;font-weight:500;color:var(--text-secondary);transition:all .2s}.auth-tab.active{color:var(--primary-color);border-bottom:2px solid 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var(--border-color);padding:1rem;overflow-y:auto;display:flex;flex-direction:column;gap:1rem}.sidebar-section{margin-bottom:1.5rem;background:var(--background-color);border-radius:.75rem;padding:1rem;border:1px solid var(--border-color)}.sidebar-section h3{font-size:.95rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}.status-grid{display:grid;gap:1rem}.status-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;background:var(--background-color);border-radius:.5rem;font-size:.875rem}.status-item label{color:var(--text-secondary)}.status-item span{font-weight:500;color:var(--text-primary)}.control-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.control-grid .btn{padding:.5rem;font-size:.875rem;display:flex;flex-direction:column;align-items:center;gap:.25rem}.app-content{flex:1;display:flex;flex-direction:column;background:var(--surface-color)}.content-tabs{display:flex;border-bottom:1px 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