*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #1f2933;
    background-color: #f9fafb;
}


main {
    flex: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.site-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 1rem 1.5rem;
    background-color: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}
.site-nav a {
    text-decoration: none;
    font-weight: 500;
    color: #374151;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.site-nav a:hover {
    color: #111827;
}
.site-nav a.active {
    color: #2563eb; /* Blue accent */
    border-bottom-color: #2563eb;
}

.site-footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
    font-size: 0.875rem;
    color: #6b7280;
    border-top: 1px solid #e5e7eb;
    background-color: #ffffff;
}

a {
    color: #2563eb;
}
a:hover {
    text-decoration: underline;
}

button {
    font-family: inherit;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: none;
    background-color: #2563eb;
    color: white;
    cursor: pointer;
}
button:hover {
    background-color: #1d4ed8;
}