/* Shared site chrome — statistics learning mini-site */
.site-body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
}

.site-banner {
    flex-shrink: 0;
    border-bottom: 1px solid rgb(226 232 240);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.site-banner-inner {
    max-width: 1152px;
    margin-left: auto;
    margin-right: auto;
    padding: 0.875rem 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 1rem;
}

.site-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #1e293b;
    text-decoration: none;
    letter-spacing: -0.025em;
}

.site-title:hover {
    color: #4f46e5;
}

.site-title:focus-visible {
    outline: 2px solid #4f46e5;
    outline-offset: 2px;
    border-radius: 0.25rem;
}

.site-tagline {
    font-size: 0.8125rem;
    color: #64748b;
    max-width: 22rem;
    line-height: 1.45;
}

@media (min-width: 768px) {
    .site-banner-inner {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

.site-main {
    flex: 1;
    width: 100%;
    padding: 1rem 1rem 2rem;
}

@media (min-width: 768px) {
    .site-main {
        padding: 1.5rem 1.5rem 2.5rem;
    }
}

.site-footer {
    flex-shrink: 0;
    border-top: 1px solid rgb(226 232 240);
    background: rgb(248 250 252);
    padding: 1.25rem 1rem;
}

.site-footer-inner {
    max-width: 1152px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    font-size: 0.75rem;
    color: #64748b;
    line-height: 1.6;
}

.breadcrumb-nav {
    margin-bottom: 1.25rem;
}

.breadcrumb-nav ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.375rem 0.5rem;
    font-size: 0.875rem;
}

.breadcrumb-nav a {
    color: #4f46e5;
    text-decoration: none;
}

.breadcrumb-nav a:hover {
    text-decoration: underline;
}

.breadcrumb-nav a:focus-visible {
    outline: 2px solid #4f46e5;
    outline-offset: 2px;
    border-radius: 0.25rem;
}

.breadcrumb-sep {
    color: #cbd5e1;
    user-select: none;
}