:root {
    --primary: #3B82F6;
    --secondary: #10B981;
    --accent: #F59E0B;
    --danger: #EF4444;
    --background: #F9FAFB;
    --text: #1F2937;
    --border: #E5E7EB;
    --white: #FFFFFF;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: #2563EB;
}

.btn-disabled {
    background-color: #9CA3AF;
    color: white;
    cursor: not-allowed;
}

.card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-info {
    background-color: #DBEAFE;
    color: #1E40AF;
}

@media (max-width: 768px) {
    .table-responsive {
        overflow-x: auto;
    }

    nav .flex {
        flex-direction: column;
    }
}

.loading {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 1rem 1.5rem;
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}