/**
 * Shared styles for secondary pages (Privacy, Terms, About, Contact)
 */

/* ===== Page Navigation ===== */
.page-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.nav-brand {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition);
}

.nav-brand:hover {
    color: var(--color-primary);
}

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

.nav-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition);
    padding: var(--spacing-xs) 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

/* ===== Page Content ===== */
.page-content {
    min-height: 60vh;
}

.page-content h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.page-updated {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-xl);
}

.page-content section {
    margin-bottom: var(--spacing-xl);
}

.page-content h2 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.page-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.page-content p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.page-content p:last-child {
    margin-bottom: 0;
}

.page-content ul,
.page-content ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.page-content li {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.page-content a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

.page-content a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* ===== Formula Block ===== */
.formula-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-md) 0;
    text-align: center;
    overflow-x: auto;
}

.formula-block code {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 1rem;
    color: var(--color-primary);
    white-space: nowrap;
}

/* ===== Contact Card ===== */
.contact-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-md) 0;
}

.contact-card h3 {
    margin-top: 0;
}

.contact-card .btn {
    margin-top: var(--spacing-sm);
}

/* ===== Footer Navigation ===== */
.footer-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.footer-nav a {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--color-primary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .page-nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .page-content h1 {
        font-size: 1.5rem;
    }

    .page-content h2 {
        font-size: 1.125rem;
    }

    .formula-block code {
        font-size: 0.8rem;
    }

    .footer-nav {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
}