:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #4cc9f0;
    --bg-light: #f8f9fa;
    --text-dark: #2d3436;
    --text-muted: #636e72;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f4f7f9;
    color: var(--text-dark);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

/* Navbar Modernization */
.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,.04);
    padding: 0.75rem 1.5rem;
}

.navbar-brand {
    font-weight: 800;
    color: var(--primary-color) !important;
    letter-spacing: -0.5px;
    font-size: 1.25rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-muted) !important;
    padding: 0.5rem 1rem !important;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link.active {
    color: var(--primary-color) !important;
}

/* Global Card Styling */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    background: #fff;
    transition: transform 0.2s ease;
}

/* Utility Classes */
.text-purple { color: #6f42c1; }
.bg-primary-light { background-color: rgba(67, 97, 238, 0.1); }
.rounded-xl { border-radius: var(--border-radius); }

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: 8px;
    font-weight: 600;
    padding: 0.5rem 1.25rem;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text-dark);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #bbb;
}