/* ==========================================================================
   Layout Structure
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: var(--color-secondary);
    margin: var(--spacing-md) auto 0;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.site-logo {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.site-logo a {
    color: var(--color-primary);
}

/* Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 80%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--color-primary);
    margin: 5px 0;
    transition: var(--transition);
}

/* ... existing code ... */

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-section a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}