/* Container */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--spacing-lg) * -1);
}

.col {
    flex: 1;
    padding: 0 var(--spacing-lg);
}

.col-12 { flex: 0 0 100%; }
.col-11 { flex: 0 0 91.666667%; }
.col-10 { flex: 0 0 83.333333%; }
.col-9 { flex: 0 0 75%; }
.col-8 { flex: 0 0 66.666667%; }
.col-7 { flex: 0 0 58.333333%; }
.col-6 { flex: 0 0 50%; }
.col-5 { flex: 0 0 41.666667%; }
.col-4 { flex: 0 0 33.333333%; }
.col-3 { flex: 0 0 25%; }
.col-2 { flex: 0 0 16.666667%; }
.col-1 { flex: 0 0 8.333333%; }

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-fixed);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.header-nav > a,
.header-nav .nav-link {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
}

.header-nav > a:hover,
.header-nav .nav-link:hover {
    color: var(--color-primary);
}

.header-nav .active {
    color: var(--color-primary);
}

.nav-item {
    position: relative;
}

.nav-arrow {
    font-size: 0.6em;
    margin-left: 2px;
    opacity: 0.5;
    transition: transform var(--transition-fast);
}

.nav-item:hover .nav-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 220px;
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    padding: var(--spacing-sm) 0;
    display: none;
    opacity: 0;
    z-index: var(--z-dropdown);
}

.nav-item:hover .nav-dropdown {
    display: block;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding-left: calc(var(--spacing-lg) + 4px);
}

.header-search {
    position: relative;
}

.header-search input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    width: 200px;
    transition: border-color var(--transition-fast);
}

.header-search input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.header-search button {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-fast);
}

/* Main Content */
.main {
    padding-top: 70px;
    min-height: calc(100vh - 70px - 300px);
}

/* Section */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

/* Footer */
.footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
}

.footer-about p {
    color: rgba(255,255,255,0.6);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin: var(--spacing-md) 0;
}

.footer-section h4 {
    color: var(--color-bg-white);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255,255,255,0.6);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.footer-section a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: #fff;
    padding-left: 0;
}

.footer-bottom {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.4);
    font-size: var(--font-size-sm);
}

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

.footer-links a {
    color: rgba(255,255,255,0.4);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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