@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:wght@400;600;700&display=swap');

:root {
    --primary-color: #0A2240; /* Deep Institutional Navy */
    --secondary-color: #465F7A; /* Muted Steel Blue */
    --accent-color: #89A2BF; /* Soft Neutral Blue */
    --background-color: #F8F9FA; /* Light Neutral Grey */
    --text-color: #343A40; /* Dark Neutral Grey */
    --text-light: #F8F9FA;
    --border-color: #DEE2E6;
    --font-family: 'Source Sans Pro', sans-serif;
    --spacing-xs: 4px;
    --spacing-s: 8px;
    --spacing-m: 16px;
    --spacing-l: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 64px;
    --border-radius: 4px;
    --header-height: 80px;
}

/* --- Global Reset & Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.7;
    font-size: 16px;
}

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

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: var(--spacing-m);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }
p { margin-bottom: var(--spacing-m); }
.lead {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--secondary-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-l);
}

/* --- Header & Navigation --- */
.site-header {
    background-color: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    height: var(--header-height);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 var(--spacing-xl);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}
.logo:hover {
    color: var(--secondary-color);
    text-decoration: none;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-l);
}

.main-nav a {
    color: var(--secondary-color);
    font-weight: 600;
    padding: var(--spacing-s) 0;
    position: relative;
    text-decoration: none;
}

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

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

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

.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-m) 0;
    min-width: 220px;
    flex-direction: column;
    gap: 0;
}

.dropdown:hover .dropdown-menu {
    display: flex;
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-menu a {
    padding: var(--spacing-s) var(--spacing-l);
    display: block;
    width: 100%;
    white-space: nowrap;
}
.dropdown-menu a::after {
    display: none;
}
.dropdown-menu a:hover {
    background-color: var(--background-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--primary-color);
    margin: 5px 0;
    transition: all 0.3s ease-in-out;
}

.breadcrumb-nav {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xl);
}
.breadcrumb-nav a {
    color: var(--secondary-color);
}
.breadcrumb-nav a:hover {
    color: var(--primary-color);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-xxl) 0;
    background-size: cover;
    background-position: center;
    color: var(--text-light);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(10, 34, 64, 0.8) 0%, rgba(10, 34, 64, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    width:90%;
}

.hero-title {
    color: #fff;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
    margin: 0;
}

/* --- Content Sections --- */
.content-section {
    padding: var(--spacing-xxl) 0;
}
.content-section-alt {
    padding: var(--spacing-xxl) 0;
    background-color: #fff;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* --- Card Grid --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    filter: grayscale(30%) contrast(90%);
}
.card-content {
    padding: var(--spacing-l);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}
.card-content h3 {
    margin-top: 0;
}
.card-content p {
    flex-grow: 1;
}
.text-link {
    font-weight: 700;
    color: var(--primary-color);
    align-self: flex-start;
}
.text-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* --- Article & About Page Styles --- */
.article-section, .about-section { padding: var(--spacing-xxl) 0; }
.article-container { max-width: 800px; }
.article-container h2, .article-container h3 {
    margin-top: var(--spacing-xl);
}
.article-container p, .article-container li {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-image-full {
    margin: var(--spacing-xl) 0;
}
.article-image-full img {
    border-radius: var(--border-radius);
    filter: grayscale(30%);
}
.article-image-full figcaption {
    font-size: 0.9rem;
    text-align: center;
    color: var(--secondary-color);
    margin-top: var(--spacing-s);
}

.related-articles {
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
}
.related-articles ul {
    list-style: none;
    padding-left: 0;
}
.related-articles li a {
    display: block;
    padding: var(--spacing-s) 0;
    font-weight: 600;
}

.image-content-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    margin-top: var(--spacing-xl);
}
.image-content-split.reverse .image-block { order: -1; }
.image-content-split img {
    border-radius: var(--border-radius);
    filter: grayscale(30%);
}

.content-block-full {
    margin-top: var(--spacing-xxl);
}


/* --- Structural Diagram --- */
.diagram-container {
    background-color: #fff;
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-align: center;
    margin: var(--spacing-xxl) auto;
}
.diagram-title { text-align: center; }
.diagram-box {
    border: 2px solid;
    padding: var(--spacing-l);
    margin: var(--spacing-s) auto;
    border-radius: var(--border-radius);
    max-width: 80%;
}
.diagram-box p { margin-bottom: 0; font-size: 0.9rem; color: var(--secondary-color); }
.diagram-box strong { color: var(--primary-color); }
.diagram-arrow {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
}
.layer-4 { border-color: var(--primary-color); }
.layer-3 { border-color: var(--secondary-color); }
.layer-2 { border-color: var(--accent-color); }
.layer-1 { border-color: #ced4da; }

/* --- Contact Page --- */
.contact-container { max-width: 1100px; }
.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xxl);
}
.contact-form-wrapper h2 { margin-top: 0; }
.contact-details {
    padding-left: var(--spacing-xl);
    border-left: 1px solid var(--border-color);
}
.contact-details address { font-style: normal; }

.form-group {
    margin-bottom: var(--spacing-l);
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-s);
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: var(--spacing-m);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}
.form-group input:focus, .form-group textarea:focus {
    outline: 2px solid var(--accent-color);
    border-color: var(--accent-color);
}

.button {
    background-color: var(--primary-color);
    color: #fff;
    padding: var(--spacing-m) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-decoration: none;
}
.button:hover {
    background-color: var(--secondary-color);
    text-decoration: none;
    color: #fff;
}

.map-container {
    width: 100%;
    height: 450px;
    border-radius: 12px;
    overflow: hidden;
    margin: var(--spacing-xxl) 0 0;
    border: 1px solid var(--border-color);
}
.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    filter: grayscale(80%) contrast(90%);
}

/* --- Thank You Page --- */
.thank-you-section {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 20px;
}
.thank-you-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}
.thank-you-icon svg {
    color: white;
}
.thank-you-section h1 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: 20px; }
.thank-you-section p { font-size: 1.2rem; color: var(--secondary-color); max-width: 600px; margin-bottom: 30px; }

/* --- Footer --- */
.site-footer-main {
    background-color: var(--primary-color);
    color: rgba(255,255,255,0.8);
    padding-top: var(--spacing-xxl);
    font-size: 0.9rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}
.footer-column h4 {
    color: #fff;
    margin-bottom: var(--spacing-m);
}
.footer-column p, .footer-column a {
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--spacing-s);
}
.footer-column a:hover {
    color: #fff;
    text-decoration: underline;
}
.footer-column ul {
    list-style: none;
    padding: 0;
}
.footer-bottom {
    border-top: 1px solid var(--secondary-color);
    text-align: center;
    padding: var(--spacing-l) 0;
    margin-top: var(--spacing-xl);
}
.footer-bottom p {
    margin: 0;
    font-size: 0.8rem;
}

/* --- Disclaimer Section --- */
.disclaimer-section {
    background-color: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-l);
    border-radius: var(--border-radius);
    text-align: left;
    font-size: 0.8rem;
    line-height: 1.6;
    border: 1px solid var(--secondary-color);
}
.disclaimer-section p {
    margin: 0;
}
.disclaimer-section strong {
    display: block;
    margin-bottom: var(--spacing-s);
    color: rgba(255,255,255,0.9);
}


/* --- Cookie Banner --- */
#cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 34, 64, 0.95);
    color: #fff;
    padding: var(--spacing-l);
    display: none;
    align-items: center;
    justify-content: space-between;
    z-index: 9999;
    gap: var(--spacing-l);
    backdrop-filter: blur(5px);
}
#cookie-banner p {
    margin: 0;
}
.cookie-buttons {
    display: flex;
    gap: var(--spacing-m);
    flex-shrink: 0;
}
#cookie-banner button {
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: none;
    padding: var(--spacing-s) var(--spacing-l);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 700;
}
#cookie-banner button.decline {
    background-color: transparent;
    border: 1px solid var(--secondary-color);
    color: var(--text-light);
}
#cookie-banner button:hover {
    opacity: 0.8;
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .image-content-split {
        grid-template-columns: 1fr;
    }
    .image-content-split.reverse .image-block { order: 1; }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .contact-details {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-top: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: #fff;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        padding: var(--spacing-l);
    }
    .main-nav.active {
        display: block;
    }
    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-m);
    }
    .menu-toggle {
        display: block;
    }
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    .dropdown > .dropdown-toggle::after {
        content: '';
        display: none;
    }
    .dropdown-menu {
        position: static;
        display: flex;
        box-shadow: none;
        padding: var(--spacing-m) 0 0 var(--spacing-l);
    }

    #cookie-banner {
        flex-direction: column;
        text-align: center;
    }

    .hero { min-height: 40vh; }
    .hero-content { padding-bottom: 0; }
}