@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css');

:root {
    --primary-color: #212121;
    --secondary-color: #FAFAFA;
    --accent-color: #4FC3F7;
    --text-color: #424242;
    --text-light: #FFFFFF;
    --bg-dark: #1A237E;
    --bg-gray: #f4f4f4;
    --border-color: #e0e0e0;

    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Merriweather', serif;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --spacing-xxl: 120px;

    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease-in-out;
}

/* --- RESET & BASE --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    color: var(--text-color);
    line-height: 1.7;
    background-color: var(--secondary-color);
    -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    color: var(--primary-color);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

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

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
}

/* --- HEADER & NAVIGATION --- */
.main-header {
    background-color: #ffffff;
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}
.logo:hover {
    color: var(--accent-color);
    text-decoration:none;
}

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

.nav-link {
    font-family: var(--font-heading);
    color: var(--text-color);
    font-weight: 600;
    font-size: 1rem;
    padding: var(--spacing-sm) 0;
    position: relative;
    text-decoration: none;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}
.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}
.nav-link.active {
    color: var(--primary-color);
}
.nav-link .fa-chevron-down {
    font-size: 0.8em;
    margin-left: var(--spacing-xs);
}

.dropdown {
    position: relative;
}
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    box-shadow: var(--shadow);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    min-width: 220px;
    z-index: 1001;
}
.dropdown:hover .dropdown-menu {
    display: block;
}
.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-color);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    border-radius: 4px;
}
.dropdown-menu li a:hover {
    background-color: var(--bg-gray);
    color: var(--primary-color);
    text-decoration: none;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* --- HERO SECTIONS --- */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    background-size: cover;
    background-position: center;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: var(--spacing-xl);
}
.hero-title {
    color: var(--text-light);
    font-weight: 700;
}
.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
}

.hero-small {
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    position: relative;
    background-size: cover;
    background-position: center;
}
.hero-small::before { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.hero-small .hero-content {
    padding: var(--spacing-lg);
}

.hero-article {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: var(--spacing-lg) 0;
}
.hero-article h1 { color: var(--text-light); }

/* --- BREADCRUMBS --- */
.breadcrumb {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-heading);
}
.breadcrumb-item a {
    color: var(--accent-color);
}
.breadcrumb-item.active {
    color: var(--secondary-color);
    font-weight: 600;
}
.breadcrumb-item + .breadcrumb-item::before {
    content: '/';
    margin-right: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.5);
}

/* --- BUTTONS --- */
.btn {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}
.btn-primary { background-color: var(--primary-color); color: var(--text-light); border-color: var(--primary-color); }
.btn-primary:hover { background-color: #000; border-color: #000; }
.btn-secondary { background-color: transparent; color: var(--primary-color); border-color: var(--primary-color); }
.btn-secondary:hover { background-color: var(--primary-color); color: var(--text-light); }
.btn-light { background-color: var(--secondary-color); color: var(--primary-color); border-color: var(--secondary-color); }
.btn-light:hover { background-color: #fff; transform: translateY(-2px); }

.text-link {
    font-family: var(--font-heading);
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}
.text-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* --- SECTIONS --- */
.section-light, .section-dark, .section-gray {
    padding: var(--spacing-xxl) 0;
}
.section-light { background-color: var(--secondary-color); }
.section-dark { background-color: var(--primary-color); color: var(--text-light); }
.section-dark h2, .section-dark h3 { color: var(--text-light); }
.section-dark p { color: rgba(255,255,255,0.8); }
.section-gray { background-color: var(--bg-gray); }

.section-title { margin-bottom: var(--spacing-xl); }
.section-title.text-center { text-align: center; }
.section-title a { font-size: 1rem; }

/* --- GRID & CARD LAYOUTS --- */
.grid-2, .grid-3, .grid-4 {
    display: grid;
    gap: var(--spacing-lg);
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.card {
    background-color: #ffffff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-lg);
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.card h3 { margin-top: 0; }
.card.card-dark {
    background-color: rgba(255,255,255,0.05);
}
.card.card-dark:hover {
     background-color: rgba(255,255,255,0.1);
}
.principle-card { text-align: center; }
.principle-icon { font-size: 2.5rem; color: var(--accent-color); margin-bottom: var(--spacing-md); }

/* --- CONTENT BLOCKS --- */
.alternating-content .content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xxl);
}
.alternating-content .content-block:last-child {
    margin-bottom: 0;
}
.alternating-content .content-block.reverse .content-text {
    order: 2;
}
.alternating-content .content-block.reverse .content-image {
    order: 1;
}
.content-image img {
    box-shadow: var(--shadow);
}
.strong-statement { font-weight: bold; border-left: 4px solid var(--accent-color); padding-left: var(--spacing-md); font-style: italic; }

.publications-list {
    display: grid;
    gap: var(--spacing-lg);
}
.publication-item {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
}
.publication-item:last-child { border-bottom: none; }
.publication-item h4 { margin-bottom: var(--spacing-sm); }
.publication-item p {
    color: var(--text-color);
    opacity: 0.8;
}

.about-portal-block {
    max-width: 800px;
    margin: 0 auto;
}
.about-portal-block p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

/* --- CTA SECTION --- */
.cta-section {
    background-image: linear-gradient(45deg, var(--primary-color), var(--bg-dark));
    color: var(--text-light);
    padding: var(--spacing-xl) 0;
    text-align: center;
}
.cta-section h2 { color: var(--text-light); }
.cta-section p { max-width: 600px; margin: 0 auto var(--spacing-lg); opacity: 0.9; }

/* --- FOOTER --- */
.main-footer {
    background-color: var(--primary-color);
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-xl) 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-xl);
}
.footer-column h3, .footer-column h4 {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}
.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}
.footer-column a {
    color: rgba(255,255,255,0.7);
}
.footer-column a:hover {
    color: var(--accent-color);
    text-decoration: none;
}
.footer-column i {
    margin-right: var(--spacing-sm);
    color: var(--accent-color);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.9rem;
}

/* --- ARTICLE PAGES --- */
.article-title {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    margin-bottom: var(--spacing-sm);
}
.article-meta {
    font-family: var(--font-heading);
    color: rgba(255,255,255,0.7);
}
.article-content {
    padding: var(--spacing-xxl) 0;
}
.article-container {
    max-width: 800px;
}
.article-content .article-lead {
    font-size: 1.25rem;
    font-family: var(--font-body);
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
    color: var(--primary-color);
}
.article-content h2 { margin-top: var(--spacing-xl); }
.article-content ul, .article-content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    list-style-position: outside;
}
.article-content ul li, .article-content ol li {
    margin-bottom: var(--spacing-sm);
}
.article-content ul { list-style-type: disc; }
.article-content ol { list-style-type: decimal; }
.article-image {
    margin: var(--spacing-lg) 0;
}
.article-image figcaption {
    font-size: 0.9rem;
    color: #6c757d;
    text-align: center;
    margin-top: var(--spacing-sm);
    font-style: italic;
}
.article-cta {
    background-color: var(--bg-gray);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border-left: 4px solid var(--accent-color);
}
.text-content-full { max-width: 1000px; }
.text-content-centered { max-width: 800px; margin: 0 auto; text-align: center; }

.related-articles-section {
    background-color: var(--bg-gray);
    padding: var(--spacing-xl) 0;
}
.related-articles-section h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* --- CONTACT PAGE --- */
.contact-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}
.form-disclaimer {
    background-color: #fffbe6;
    border: 1px solid #ffe58f;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 0.9em;
    margin-bottom: var(--spacing-lg);
}
.form-group {
    margin-bottom: var(--spacing-md);
}
.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
    font-weight: 600;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}
.contact-info-container h2 {
    margin-top: 0;
}
.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}
.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}
.contact-item p { margin-bottom: 0; }
.contact-item a { color: var(--text-color); }
.contact-item a:hover { color: var(--accent-color); }

.map-container {
    width: 100%;
    height: 450px;
    overflow: hidden;
}
.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* --- THANK YOU / 404 PAGE --- */
.thank-you-section {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xxl) var(--spacing-md);
}
.thank-you-icon {
  width: 80px;
  height: 80px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}
.thank-you-icon svg {
  width: 40px;
  height: 40px;
  fill: white;
}
.thank-you-section h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: var(--spacing-md); }
.thank-you-section p { font-size: 1.2rem; max-width: 600px; margin-bottom: var(--spacing-lg); }

/* --- UTILITIES & HELPERS --- */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 999;
    transition: var(--transition);
}
.back-to-top:hover {
    background-color: var(--accent-color);
}
.back-to-top.show {
    display: flex;
}

/* --- COOKIE BANNER --- */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(33, 33, 33, 0.95);
    color: white;
    padding: var(--spacing-md);
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 9999;
    flex-wrap: wrap;
}
.cookie-banner p {
    margin: 0;
    max-width: 70%;
}
.cookie-banner a {
    color: var(--accent-color);
    text-decoration: underline;
}
.cookie-buttons {
    display: flex;
    gap: var(--spacing-md);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1024px) {
    .alternating-content .content-block {
        grid-template-columns: 1fr;
    }
    .alternating-content .content-block.reverse .content-text,
    .alternating-content .content-block.reverse .content-image {
        order: initial;
    }
    .contact-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        box-shadow: 0 10px 10px rgba(0,0,0,0.05);
        padding-bottom: var(--spacing-md);
    }
    .nav-links.active {
        display: flex;
    }
    .nav-links li {
        width: 100%;
    }
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-link::after {
        display: none;
    }
    
    .dropdown {
        width: 100%;
    }
    .dropdown-menu {
        position: static;
        display: none;
        border: none;
        box-shadow: none;
        padding: 0;
        background-color: var(--bg-gray);
    }
    .dropdown:hover .dropdown-menu {
        display: none; /* Disable hover on mobile */
    }
    .dropdown.open .dropdown-menu {
        display: block;
    }
    .dropdown-menu li a {
        padding-left: var(--spacing-xl);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    .cookie-banner {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    .cookie-banner p { max-width: 100%; }
}