:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --sidebar-gradient: linear-gradient(180deg, #1e1b4b 0%, #312e81 100%);
}

body {
    font-family: 'Inter', sans-serif;
}

.sidebar {
    background: var(--sidebar-gradient);
}

.glass-effect {
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.9);
}

/* Loading spinner */
.loading-spinner {
    border: 3px solid #f3f3f3;
    border-radius: 50%;
    border-top: 3px solid #667eea;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smooth transitions */
.transition-smooth {
    transition: all 0.3s ease;
}

/* Hover effects */
.hover-lift {
    transition: transform 0.2s, box-shadow 0.2s;
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* Alert styles */
.alert {
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1fae5;
    border: 1px solid #6ee7b7;
    color: #047857;
}

.alert-error {
    background-color: #fee2e2;
    border: 1px solid #fca5a5;
    color: #b91c1c;
}

.alert-warning {
    background-color: #fef3c7;
    border: 1px solid #fcd34d;
    color: #b45309;
}

/* Button loading state */
.btn-loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

/* Page transitions */
.page-enter {
    opacity: 0;
    transform: translateX(20px);
    animation: pageEnter 0.3s ease forwards;
}

@keyframes pageEnter {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}