/* Global Grid Layout */
.app-layout {
    display: grid;
    grid-template-rows: auto auto 1fr auto auto;
    /* Header, Ad, Main, Ad, Footer */
    min-height: 100vh;
}

/* Header */
.site-header {
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
}

.site-title {
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.site-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-link.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* Main Content */
.site-main {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Footer */
.site-footer {
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: auto;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    text-align: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.lang-selector {
    margin-left: auto;
    padding: 4px 8px;
    background: var(--bg-app);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

@media (min-width: 768px) {
    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-links {
        order: 2;
    }
}