/* Layout: Container, Header, Footer, Sections */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: auto;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header Top Row: hamburger - logo - language */
.header-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--space-md) 0 var(--space-xs);
    position: relative;
}

.header-top .lang-switcher {
    position: absolute;
    right: 0;
}

.header-top .menu-toggle {
    position: absolute;
    left: 0;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-2xl);
    color: var(--color-text);
    white-space: nowrap;
}

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

.logo-icon-divider {
    height: 2.5rem;
    width: auto;
    margin: 0 0.5em;
    flex-shrink: 0;
}

.logo-text strong {
    font-weight: 700;
}

.logo-text {
    font-weight: 400;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    padding-bottom: var(--space-sm);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light);
    padding: var(--space-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.lang-switcher a {
    padding: var(--space-xs) var(--space-sm);
    color: var(--color-text-light);
    transition: all var(--transition-fast);
}

.lang-switcher a:hover {
    background-color: var(--color-bg-alt);
}

.lang-switcher a.active {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--color-text);
}

.menu-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
}

/* Main Content */
main {
    margin-top: 5.5rem; /* logo row + nav row */
}

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

.section-alt {
    background-color: var(--color-bg-alt);
}

.section-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
}

.section-dark p {
    color: rgba(255, 255, 255, 0.8);
}

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

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    max-width: 40rem;
    margin-inline: auto;
    font-size: var(--font-size-lg);
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-heading {
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
}

.footer-text {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.footer-nav a {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.4);
}

/* Grid System */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}