/* ------------------------------
   Base Styles
--------------------------------*/
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background: #f7f7f7;
    color: #333;
}

.container {
    width: 90%;
    max-width: 960px;
    margin: 0 auto;
}

/* ------------------------------
   Header
--------------------------------*/
.site-header {
    background: #1e3a5f;
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

.site-header .tagline {
    margin-top: 0.5rem;
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ------------------------------
   Navigation
--------------------------------*/
.site-nav {
    background: #2c4a72;
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
}

.site-nav li {
    flex: 1;
}

.site-nav a {
    display: block;
    padding: 0.75rem;
    text-align: center;
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}

.site-nav a:hover,
.site-nav a.active {
    background: #3d5f8c;
}

/* ------------------------------
   Main Content
--------------------------------*/
main h2 {
    margin-top: 1.5rem;
    color: #1e3a5f;
}

.intro,
.feature {
    background: #fff;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* ------------------------------
   Footer
--------------------------------*/
.site-footer {
    background: #1e3a5f;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
    font-size: 0.9rem;
}

/* ------------------------------
   Mobile Tweaks
--------------------------------*/
@media (max-width: 600px) {
    .site-nav ul {
        flex-direction: column;
    }

    .site-nav li {
        flex: none;
    }
}