/* Container */
.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* Responsive containers */
@media (min-width: 640px) {
    .container {
        max-width: 640px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 768px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1024px;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .sm\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex Utilities */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Header */
.site-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-normal), 
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    width: auto;
    height: 50px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

@media (max-width: 767px) {
    .mobile-menu-toggle {
        display: flex;
    }
}

.mobile-menu-toggle:hover {
    background-color: var(--bg-secondary);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    transition: transform var(--transition-normal),
                opacity var(--transition-normal),
                background-color var(--transition-normal);
    border-radius: var(--radius-full);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    background-color: var(--primary-color);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    background-color: var(--primary-color);
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.main-nav .nav-list a {
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.has-dropdown {
    position: relative;
}

.dropdown-toggle {
    color: var(--text-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem 0;
}

.dropdown-toggle:hover {
    color: var(--primary-color);
}

.dropdown-toggle .arrow {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.has-dropdown:hover .dropdown-toggle .arrow,
.dropdown-toggle[aria-expanded="true"] .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform-origin: top center;
    transition: opacity var(--transition-normal),
                transform var(--transition-normal),
                visibility var(--transition-normal);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    max-height: 400px;
    overflow-y: auto;
}

.has-dropdown:hover .dropdown-menu,
.dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--border-color);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    transition: background-color 0.2s ease;
}

.dropdown-menu a:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

.site-footer {
    background-color: var(--text-color);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3, .footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #9ca3af;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-xl);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }
    
    .main-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .main-nav .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 1rem 0;
    }
    
    .main-nav .nav-list a {
        display: block;
        padding: 0.75rem 1.5rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-radius: 0;
        display: none;
    }
    
    .dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
        display: block;
    }
    
    .has-dropdown {
        width: 100%;
    }
    
    .dropdown-toggle {
        width: 100%;
        justify-content: space-between;
        padding: 0.75rem 1.5rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .dropdown-menu a {
        padding-left: 2.5rem;
    }
}

[dir="rtl"] .dropdown-menu {
    left: auto;
    right: 0;
}

[dir="rtl"] .main-nav .nav-list {
    flex-direction: row-reverse;
}