/**
 * Layout Styles
 * Grid, Flexbox, Container, Navigation, Sections
 */

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navigation {
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand .logo {
    font-size: var(--font-size-2xl);
    color: var(--color-turquoise);
    margin: 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    background-color: var(--color-background);
    color: var(--color-turquoise);
    transform: translateY(-2px);
}

.nav-link.active {
    background-color: var(--color-orange);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.nav-link.active:hover {
    background-color: var(--color-orange-dark);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-base);
    border-radius: var(--radius-md);
}

.mobile-menu-toggle:hover {
    background-color: var(--color-background);
    transform: scale(1.05);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.hamburger-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
    position: relative;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
}

.hamburger-icon::before {
    top: -8px;
}

.hamburger-icon::after {
    top: 8px;
}

/* Hamburger Animation when menu is active */
.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon {
    background-color: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Main Content */
#main-content {
    min-height: calc(100vh - 200px);
}

/* Page Sections */
.page-section {
    padding: var(--spacing-3xl) 0;
    display: none;
}

.page-section.active {
    display: block;
}

.page-section h2 {
    color: var(--color-turquoise);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
}

/* Survey List */
.survey-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    grid-gap: var(--spacing-lg);
    /* Fallback for older browsers */
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Survey Form Container */
.survey-form-container {
    max-width: 600px;
    margin: 0 auto;
    display: none;
}

.survey-form-container.active {
    display: block;
}

/* Bio Content */
.bio-content {
    max-width: 800px;
    margin: 0 auto;
}

/* Contact Content */
.contact-content {
    max-width: 100%;
    margin: 0 auto;
}

/* University Content */
.university-content {
    max-width: 800px;
    margin: 0 auto;
}

/* Footer */
.site-footer {
    background-color: var(--color-turquoise-dark);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
}

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

.footer-copyright {
    margin: 0;
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.footer-domain {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.footer-link {
    color: var(--color-white);
    text-decoration: none;
    transition: all var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

.footer-link:hover {
    color: var(--color-orange-light);
    background-color: rgba(255, 255, 255, 0.1);
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-affiliation {
    margin: 0;
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.footer-title {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    opacity: 0.85;
}

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

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

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

/* Flex Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}