/* Custom Styles for Kai Zhao's Homepage */

body {
    padding-top: 70px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    background-color: #fff !important;
    border-bottom: 1px solid #e9ecef;
}

.navbar-brand {
    font-weight: 600;
    color: #2c3e50 !important;
    font-size: 1.3rem;
}

.nav-link {
    color: #5a6c7d !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #007bff !important;
}

.nav-item.active .nav-link {
    color: #007bff !important;
}

main {
    margin-top: 1rem;
    margin-bottom: 2rem;
}

h1, h2 {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.75rem;
}

.starter-template {
    margin-bottom: 1.5rem;
}

ul {
    line-height: 1.6;
}

li {
    margin-bottom: 0.3rem;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

hr {
    margin: 1.5rem 0;
    border-top: 1px solid #e9ecef;
}

.img-fluid {
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.figure-caption {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: #6c757d;
}