/* ===================================
   Texnoser Website - WCAG 2.2 AA Compliant
   
   This stylesheet meets WCAG 2.2 Level AA standards:
   - Color contrast ratios (4.5:1 minimum)
   - Touch target sizes (24×24px minimum, optimized 40×40px+)
   - Focus indicators (visible and high contrast)
   - Responsive text scaling
   - Reduced motion support
   =================================== */

/* ===================================
   CSS Reset & Base Styles
   =================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - WCAG 2.1 AA Compliant */
    --color-primary: #291E6A; /* Deep royal blue */
    --color-primary-hover: #3A3076; /* 16% lighter blue */
    --color-primary-active: #261C62;
    --color-accent: #AE2607; /* Deep royal red */
    --color-white: #ffffff;
    --color-black: #1a1a1a;
    --color-gray-light: #f8f9fa;
    --color-gray-medium: #6c757d;
    --color-gray-dark: #343a40;
    --color-text: #2c2c2c;
    --color-text-light: #5a5a5a;
    --color-border: #e0e0e0;
    
    /* Typography */
    --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-size-base: 18px;
    --font-size-small: 16px;
    --font-size-large: 20px;
    --font-size-h1: 48px;
    --font-size-h2: 40px;
    --font-size-h3: 32px;
    --font-size-h4: 24px;
    --line-height-base: 1.7;
    --line-height-heading: 1.3;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    --spacing-xxxl: 96px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-base: 300ms ease-out;
    --transition-slow: 500ms ease-out;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 2000;
    --z-fixed-buttons: 999;
    --z-back-to-top: 998;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===================================
   Skip Link (WCAG)
   =================================== */

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: calc(var(--z-modal) + 1);
    font-weight: 500;
}

.skip-link:focus {
    top: 0;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-heading);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

h4 {
    font-size: var(--font-size-h4);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   Container & Layout
   =================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

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

.section-subtitle {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    font-size: var(--font-size-large);
    color: var(--color-text-light);
}

.section-description {
    text-align: center;
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    font-size: var(--font-size-large);
    color: var(--color-text);
}

.subsection-title {
    text-align: center;
    margin: var(--spacing-xxl) 0 var(--spacing-xl);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 16px 32px;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-family);
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    background-color: var(--color-primary-active);
    transform: translateY(0);
}

/* ===================================
   Header
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-header);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.header.scrolled .header-container {
    padding: var(--spacing-xs) var(--spacing-md);
}

.logo img {
    height: 50px;
    width: auto;
    transition: height var(--transition-base);
}

.header.scrolled .logo img {
    height: 40px;
}

/* Navigation */
.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    position: relative;
    display: block;
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

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

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

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

.nav-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base);
}

.lang-toggle:hover {
    background-color: var(--color-gray-light);
}

.lang-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.flag-icon {
    width: 32px;
    height: 32px;
    opacity: 0.5;
    transition: opacity var(--transition-base);
}

.flag-icon.active {
    opacity: 1;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 70px;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(00, 00, 00, 0.8) 0%, rgba(00, 00, 00, 0.6) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--color-white);
    max-width: 900px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out;
}

.hero-description {
    font-size: clamp(18px, 2vw, 22px);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-cta {
    animation: fadeInUp 1.2s ease-out 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Services Section
   =================================== */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    padding: 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    text-align: center;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 100%;
    height: 200px;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.service-title {
    font-size: var(--font-size-h4);
    margin: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
    color: var(--color-primary);
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin: 0 var(--spacing-lg) var(--spacing-lg);
}

/* ===================================
   About Section
   =================================== */

.about-image {
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    width: 100%;
    aspect-ratio: 16 / 9;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.team-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-base);
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.team-image {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--color-primary);
}

.team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-name {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.team-role {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.team-bio {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.6;
}

.funding-info-card {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.funding-info-title {
    font-size: var(--font-size-h3);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.funding-info-text {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.funding-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: underline;
}

.funding-link:hover {
    color: var(--color-primary-hover);
}

/* ===================================
   Projects Section
   =================================== */

.projects-slider-container {
    position: relative;
    margin-top: var(--spacing-xl);
    padding: 20px 60px;
    overflow: visible;
}

.projects-slider {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    overflow-y: visible;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 10px 0;
}

.projects-slider::-webkit-scrollbar {
    display: none;
}

.project-card {
    flex: 0 0 calc(33.333% - var(--spacing-lg));
    min-width: 320px;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    scroll-snap-align: start;
    margin: 10px 0;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: var(--spacing-md);
}

.project-title {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.project-short-description {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 12px;
    color: var(--color-text-light);
}

.project-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.project-meta-item::before {
    content: '•';
    color: var(--color-accent);
    font-weight: bold;
}

.project-meta-item:first-child::before {
    content: none;
}

/* Slider Arrows - WCAG 2.2 Target Size compliant (minimum 24×24px, optimized 40×40px+) */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 10;
}

.slider-arrow:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-50%) scale(1.1);
}

.slider-arrow:active {
    background-color: var(--color-primary-active);
}

.slider-arrow:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.slider-arrow-left {
    left: 0;
}

.slider-arrow-right {
    right: 0;
}

/* ===================================
   Contact Section
   =================================== */

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xxl);
    margin-top: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
}

.contact-icon img {
    width: 32px;
    height: 32px;
    display: block;
}

.contact-details {
    flex: 1;
}

.contact-label {
    font-size: var(--font-size-large);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.contact-value {
    font-size: var(--font-size-base);
    color: var(--color-text);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.contact-link {
    color: var(--color-primary);
    transition: color var(--transition-base);
}

.contact-link:hover {
    color: var(--color-primary-hover);
}

.phone-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.phone-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.contact-name {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

.phone-icons {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.phone-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}

.phone-icons a:hover {
    transform: scale(1.1);
}

.phone-icons img {
    width: 24px;
    height: 24px;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}

.social-links a:hover {
    transform: scale(1.1);
}

.social-links img {
    width: 36px;
    height: 36px;
}

.contact-map {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 100%;
    min-height: 450px;
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    display: block;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--color-gray-dark);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.footer-link {
    color: var(--color-white);
    text-decoration: underline;
    transition: color var(--transition-base);
}

.footer-link:hover {
    color: var(--color-accent);
}

.funding-banner {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.funding-logos {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.funding-logos img {
    height: 120px;
    width: auto;
    filter: brightness(1.1);
    border-radius: 8px;
}

.funding-banner-text {
    color: var(--color-white);
    font-size: var(--font-size-base);
}

/* ===================================
   Back to Top Button
   =================================== */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-back-to-top);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-4px);
}

.back-to-top:active {
    background-color: var(--color-primary-active);
}

.back-to-top:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* ===================================
   Fixed Buttons (WCAG & DYPA)
   =================================== */

.fixed-buttons {
    position: fixed;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: var(--z-fixed-buttons);
}

.fixed-btn {
    width: 80px;
    height: 80px;
    background-color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    padding: var(--spacing-xs);
}

.fixed-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.fixed-btn:active {
    transform: scale(0.98);
}

.fixed-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.wcag-btn {
    background-color: var(--color-primary);
    padding: 0;
}

.wcag-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.fixed-btn-text {
    color: var(--color-white);
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    line-height: 1.2;
}

.dypa-btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

/* ===================================
   Modals
   =================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    position: relative;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    max-width: 1200px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-base);
    z-index: 1;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-medium);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 2;
    color: var(--color-text);
}

.modal-close:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-white);
    transform: rotate(90deg);
}

.modal-close:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-title {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.modal-text {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--color-text);
}

.modal-image {
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modal-image img {
    width: 100%;
    height: auto;
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Animation on Scroll
   =================================== */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --font-size-h1: 40px;
        --font-size-h2: 34px;
        --font-size-h3: 28px;
        --spacing-xxxl: 72px;
    }
    
    .projects-slider-container {
        padding: 20px 50px;
    }
    
    .project-card {
        flex: 0 0 calc(50% - var(--spacing-lg));
        min-width: 300px;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 16px;
        --font-size-large: 18px;
        --font-size-h1: 32px;
        --font-size-h2: 28px;
        --font-size-h3: 24px;
        --font-size-h4: 20px;
        --spacing-xxxl: 56px;
        --spacing-xxl: 48px;
    }
    
    .header-container {
        padding: var(--spacing-sm);
    }
    
    .logo img {
        max-width: 68%;
        width: auto;
    }
    
    /* Mobile Navigation */
    .nav {
        position: fixed;
        top: 82px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base), top var(--transition-base);
    }
    
    .header.scrolled .nav {
        top: 64px;
    }
    
    .nav.active {
        max-height: 400px;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-md) 0;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        font-size: var(--font-size-large);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Hero adjustments */
    .hero {
        height: calc(100vh - 70px);
    }
    
    /* Services Grid */
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    /* Team Grid */
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    /* Projects Slider */
    .projects-slider-container {
        padding: 20px 40px;
    }
    
    .project-card {
        flex: 0 0 calc(100% - var(--spacing-md));
        min-width: 280px;
    }
    
    .slider-arrow {
        width: 44px;
        height: 44px;
    }
    
    /* Contact Grid */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .funding-info-card {
        text-align: left;
    }
    
    /* Fixed Buttons */
    .fixed-buttons {
        bottom: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .fixed-btn {
        width: 64px;
        height: 64px;
    }
    
    .fixed-btn-text {
        font-size: 11px;
    }
    
    /* Back to Top */
    .back-to-top {
        width: 48px;
        height: 48px;
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    /* Modal */
    .modal-body {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xxxl: 40px;
        --spacing-xxl: 32px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-xxl) 0;
    }
    
    .hero-content {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        padding: 14px 24px;
        font-size: var(--font-size-small);
    }
    
    .service-card,
    .team-card {
        padding: var(--spacing-md);
    }
    
    .projects-slider-container {
        padding: 20px 35px;
    }
    
    .slider-arrow {
        width: 40px;
        height: 40px;
    }
    
    .fixed-buttons {
        gap: var(--spacing-xs);
    }
    
    .fixed-btn {
        width: 56px;
        height: 56px;
    }
    
    .fixed-btn-text {
        font-size: 10px;
    }
    
    .funding-banner {
        gap: var(--spacing-sm);
    }
}

/* ===================================
   Print Styles (WCAG)
   =================================== */

@media print {
    .header,
    .nav,
    .mobile-menu-toggle,
    .back-to-top,
    .fixed-buttons,
    .slider-arrow,
    .modal {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
        color: #000;
    }
    
    .section {
        page-break-inside: avoid;
    }
}

/* ===================================
   Focus Visible (Better Keyboard Navigation)
   =================================== */

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* ===================================
   Reduced Motion (WCAG)
   =================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}