:root {
    --primary-color: #2563eb;
    --hover-color: #1d4ed8;
    --border-radius: 12px;
    --button-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: #f8fafc;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 0.5rem 1rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: 600;
    color: var(--primary-color);
}

.nav-link {
    color: #4b5563;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-link:hover {
    background: #f0f6ff;
    color: var(--primary-color);
}

.nav-link.active {
    background: #f0f6ff;
    color: var(--primary-color);
}

.content-wrapper {
    margin-top: 56px;
    padding: 2rem;
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.15);
}

.card {
    transition: all 0.3s ease;
}

.card.active {
    background: #2563eb;
    color: white;
    box-shadow: 0 1cm 1rem rgba(255, 255, 255, 0.3);
}