:root {
    /* Color Palette */
    --primary-color: #0d9488; /* Teal 600 */
    --primary-dark: #0f766e; /* Teal 700 */
    --secondary-color: #d97706; /* Amber 600 */
    --bg-color: #ffffff;
    --bg-light: #f8fafc; /* Slate 50 */
    --text-main: #1e293b; /* Slate 800 */
    --text-muted: #64748b; /* Slate 500 */
    --border-color: #e2e8f0; /* Slate 200 */
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0d9488 0%, #0369a1 100%);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-main);
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

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

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

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    font-weight: 500;
    font-family: var(--font-heading);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(13, 148, 136, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 148, 136, 0.5);
    color: white;
}

.btn-outline {
    border-color: white;
    color: white;
    background: transparent;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: white;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    padding: 0.5rem 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 0.5rem 0;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
}

.header.scrolled .logo,
.header.scrolled .nav-links a {
    color: var(--text-main);
}

.header.scrolled .btn-primary {
    padding: 0.5rem 1.25rem;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: white;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/images/hero.png');
    background-size: cover;
    background-position: center;
    z-index: -2;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    color: white;
}

.hero h1 {
    font-size: 4.5rem;
    color: white;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Section Header */
.section-header {
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: rgba(13, 148, 136, 0.1);
    color: var(--primary-color);
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 20px;
}

.about-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.image-accent {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary-color);
    border-radius: 20px;
    z-index: 1;
}

.feature-list {
    margin-top: 2rem;
}

.feature-list li {
    margin-bottom: 0.75rem;
    color: var(--text-main);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Grid & Cards */
.grid {
    display: grid;
    gap: 2rem;
}

.cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: bold;
    margin-bottom: 1.5rem;
}

/* Use Cases */
.use-case-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.use-case-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.uc-img-placeholder {
    height: 200px;
    background-color: #e2e8f0;
    background-size: cover;
    background-position: center;
}

.uc-content {
    padding: 2rem;
}

.uc-category {
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.5rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.read-more:hover {
    color: var(--primary-color);
}

/* Consortium */
.partner-logos {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    justify-items: center;
    align-items: center;
}

.logo-placeholder {
    width: 160px;
    height: 80px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-weight: 600;
    transition: var(--transition);
    filter: grayscale(100%);
    opacity: 0.7;
}

.logo-placeholder:hover {
    filter: grayscale(0%);
    opacity: 1;
    box-shadow: var(--shadow-sm);
    transform: scale(1.05);
}

.logo-placeholder img {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
}

/* Footer */
.footer {
    background-color: #0f172a; /* Slate 900 */
    color: #cbd5e1; /* Slate 300 */
    padding: 5rem 0 2rem;
}

.footer h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

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

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #cbd5e1;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.newsletter-form {
    display: flex;
    margin-top: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    color: white;
    border-radius: 4px 0 0 4px;
    outline: none;
}

.newsletter-form button {
    border-radius: 0 4px 4px 0;
    padding: 0.75rem 1rem;
    border: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.eu-disclaimer {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
}

.eu-flag {
    font-size: 3rem;
    line-height: 1;
}

.eu-disclaimer p {
    font-size: 0.85rem;
    margin: 0;
    color: #94a3b8;
}

.copyright {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.legal-links {
    display: flex;
    gap: 1.5rem;
}

.legal-links a {
    color: #94a3b8;
}

.legal-links a:hover {
    color: white;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-left.visible, .slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero h1 { font-size: 3.5rem; }
    .about-container { grid-template-columns: 1fr; gap: 3rem; }
    .about-image { margin-top: 2rem; max-width: 600px; margin-inline: auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
    .partner-logos { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links, .header .btn-primary { display: none; }
    .mobile-menu-toggle { display: flex; }
    .mobile-menu-toggle .header.scrolled span { background-color: var(--text-main); }
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }
    .section { padding: 4rem 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .copyright { flex-direction: column; gap: 1rem; text-align: center; }
    .partner-logos { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
}