:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-bg: #f8f9fa;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    background-color: #f5f7fa;
}

.navbar {
    background-color: var(--secondary-color);
}

.navbar-brand {
    font-weight: bold;
    color: white !important;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: white !important;
}


footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 20px 0;
}
.back-to-top {
    position: fixed;
    bottom: 80px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
}
.footer-link{
    color: white;
    text-decoration: none;
}
.footer-link:hover{
    color: var(--primary-color);
}