:root {
    /* Colours */
    --primary-color: #1A237E;
    --secondary-color: #E8EAF6;
    --accent-color: #FF6D00;
    --text-color: #333;
    --light-text-color: #f8f8f8;
    --border-color: #ddd;
    --background-color: #fff;
    --light-background-color: #f9f9f9;
    --error-color: #d32f2f;
    --success-color: #388e3c;

    /* Typography */
    --font-family-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    --font-size-base: 1rem; /* 16px */
    --line-height-base: 1.6;
    --heading-line-height: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Borders & Shadows */
    --border-radius: 4px;
    --box-shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --box-shadow-md: 0 4px 6px rgba(0,0,0,0.1);

    /* Z-index */
    --z-index-dropdown: 1000;
    --z-index-fixed: 1010;
    --z-index-modal: 1020;
    --z-index-cookie: 1030;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    font-family: var(--font-family-system);
    color: var(--text-color);
    background-color: var(--background-color);
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

a:hover {
    text-decoration: underline;
}

/* Accessibility: Focus styles */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: var(--border-radius);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--heading-line-height);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Paragraphs and Text */
p {
    margin-bottom: var(--spacing-sm);
}

small {
    font-size: 0.875em;
}

/* Lists */
ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

ul li, ol li {
    margin-bottom: var(--spacing-xs);
}

/* Container for magazine layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
}

/* Header & Navigation */
.site-header {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: var(--box-shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-index-fixed);
}

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

.site-logo {
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--light-text-color);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
}

.site-logo:hover {
    text-decoration: none;
    color: var(--accent-color);
}

/* Mega Navigation */
.main-nav {
    display: none; /* Hidden by default on mobile */
    width: 100%;
    margin-top: var(--spacing-sm);
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.main-nav ul li {
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.main-nav ul li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--light-text-color);
    text-decoration: none;
    white-space: nowrap;
}

.main-nav ul li a:hover,
.main-nav ul li a:focus {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border-radius: var(--border-radius);
}

/* Mega menu dropdown content */
.main-nav ul li .mega-menu {
    display: none;
    background-color: var(--secondary-color);
    padding: var(--spacing-sm);
    box-shadow: var(--box-shadow-md);
    border-radius: var(--border-radius);
    position: static; /* Stacked on mobile */
    width: 100%;
    left: 0;
    margin-top: var(--spacing-xs);
}

.main-nav ul li:hover > .mega-menu,
.main-nav ul li a:focus + .mega-menu,
.main-nav ul li .mega-menu:focus-within {
    display: block;
}

.mega-menu h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-xs);
}

.mega-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: block; /* Override flex for columns */
}

.mega-menu ul li {
    margin-bottom: 0;
}

.mega-menu ul li a {
    color: var(--text-color);
    padding: var(--spacing-xs) 0;
    font-size: 0.95rem;
}

.mega-menu ul li a:hover,
.mega-menu ul li a:focus {
    background-color: transparent;
    color: var(--accent-color);
    text-decoration: underline;
}

/* Mobile navigation toggle */
.nav-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--light-text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle:hover {
    color: var(--accent-color);
}

.nav-toggle[aria-expanded="true"] + .main-nav {
    display: block;
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .main-nav {
        display: block;
        width: auto;
        margin-top: 0;
    }

    .main-nav ul {
        flex-direction: row;
    }

    .main-nav ul li {
        margin-left: var(--spacing-md);
        margin-bottom: 0;
    }

    .main-nav ul li a {
        padding: var(--spacing-sm) var(--spacing-xs);
    }

    /* Mega menu for desktop */
    .main-nav ul li .mega-menu {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        width: max(300px, 60vw); /* Minimum width or 60% of viewport */
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
        margin-top: var(--spacing-xs);
        z-index: var(--z-index-dropdown);
    }
}

/* Magazine Layout Specifics */
.magazine-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.magazine-main-content {
    order: 2; /* Main content below sidebar on small screens */
}

.magazine-sidebar {
    background-color: var(--light-background-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-sm);
    order: 1; /* Sidebar above main content on small screens */
}

.magazine-sidebar h3 {
    color: var(--primary-color);
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.magazine-sidebar ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.magazine-sidebar ul li {
    margin-bottom: var(--spacing-xs);
}

.magazine-sidebar ul li a {
    display: block;
    padding: var(--spacing-xs) 0;
    color: var(--text-color);
}

.magazine-sidebar ul li a:hover,
.magazine-sidebar ul li a:focus {
    color: var(--accent-color);
    text-decoration: underline;
}

.featured-articles {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.article-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.article-card-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-card h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    font-size: 1.3rem;
}

.article-card p {
    font-size: 0.95rem;
    color: #555;
    flex-grow: 1;
}

.article-card .read-more {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: bold;
}

.article-card .read-more:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

@media (min-width: 768px) {
    .magazine-layout {
        grid-template-columns: 1fr 3fr; /* Sidebar on left, main content on right */
    }
    .magazine-main-content {
        order: initial;
    }
    .magazine-sidebar {
        order: initial;
    }
    .featured-articles {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (min-width: 1024px) {
    .magazine-layout {
        grid-template-columns: 1fr 4fr; /* Wider main content */
    }
}


/* Forms */
.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: bold;
    color: var(--primary-color);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-family-system);
    font-size: var(--font-size-base);
    color: var(--text-color);
    background-color: var(--background-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(var(--accent-color), 0.2);
    outline: none;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
    margin-right: var(--spacing-xs);
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    display: grid;
    place-content: center;
    flex-shrink: 0;
}

.checkbox-group input[type="checkbox"]::before {
    content: "";
    width: 0.75rem;
    height: 0.75rem;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 60%);
    transform: scale(0);
    transform-origin: bottom left;
    transition: transform 0.2s ease-in-out;
    background-color: var(--light-text-color);
}

.checkbox-group input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-group input[type="checkbox"]:checked::before {
    transform: scale(1);
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: normal;
    color: var(--text-color);
    cursor: pointer;
}

.form-error {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: block;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    border-color: var(--primary-color);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: darken(var(--primary-color), 10%);
    color: var(--light-text-color);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--accent-color);
    color: var(--light-text-color);
    border-color: var(--accent-color);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: darken(var(--accent-color), 10%);
    color: var(--light-text-color);
    text-decoration: none;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover,
.btn-outline:focus {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    text-decoration: none;
}

/* Tables */
.responsive-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    min-width: 600px; /* Ensure table is scrollable on small screens if content wide */
}

table th,
table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    font-weight: bold;
    text-transform: uppercase;
}

table tbody tr:nth-child(odd) {
    background-color: var(--light-background-color);
}

table tbody tr:hover {
    background-color: var(--secondary-color);
    cursor: pointer;
}

/* Details/Summary */
details {
    background-color: var(--light-background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
}

summary {
    padding: var(--spacing-sm);
    font-weight: bold;
    cursor: pointer;
    outline: none;
    position: relative;
    list-style: none; /* Hide default arrow */
    color: var(--primary-color);
}

summary::before {
    content: '▶'; /* Custom arrow */
    position: absolute;
    right: var(--spacing-sm);
    transition: transform 0.2s ease;
}

details[open] summary::before {
    transform: rotate(90deg);
}

summary:hover {
    background-color: var(--secondary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

details > div {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

/* Aside */
aside {
    background-color: var(--secondary-color);
    border-left: 5px solid var(--primary-color);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
}

aside h3 {
    color: var(--primary-color);
    margin-top: 0;
}

/* Blockquote */
blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: #555;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Definition List */
dl {
    margin-bottom: var(--spacing-lg);
}

dt {
    font-weight: bold;
    color: var(--primary-color);
    margin-top: var(--spacing-sm);
}

dd {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

/* Footer */
.site-footer {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.site-footer .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.footer-section {
    flex: 1 1 250px; /* Allow sections to grow but wrap at 250px */
    min-width: 200px;
}

.footer-section h3 {
    color: var(--light-text-color);
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: var(--spacing-xs);
}

.footer-section p,
.footer-section ul {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--secondary-color);
    text-decoration: none;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.85rem;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    color: var(--light-text-color);
    padding: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: var(--z-index-cookie);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
}

.cookie-banner p {
    margin: 0;
    flex-grow: 1;
    font-size: 0.9rem;
}

.cookie-banner a {
    color: var(--accent-color);
    text-decoration: underline;
}

.cookie-banner .btn {
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

/* Print Styles */
@media print {
    body {
        background-color: #fff;
        color: #000;
        font-family: serif;
        font-size: 12pt;
    }

    .site-header, .main-nav, .site-footer, .cookie-banner, .nav-toggle, .magazine-sidebar, .btn {
        display: none !important;
    }

    a {
        text-decoration: underline;
        color: #000;
    }

    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        word-break: break-all;
    }

    .container {
        width: 100%;
        max-width: none;
        padding: 0;
        margin: 0;
    }

    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
        color: #000;
    }

    blockquote {
        border: 1px solid #ccc;
        padding: var(--spacing-sm);
        margin: var(--spacing-sm) 0;
    }

    table {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }

    table th, table td {
        border: 1px solid #ccc;
        padding: 0.5em;
    }

    table tbody tr:nth-child(odd) {
        background-color: #f0f0f0;
    }

    .magazine-layout {
        display: block;
    }

    .magazine-main-content {
        width: 100%;
    }

    .featured-articles {
        display: block;
    }

    .article-card {
        border: none;
        box-shadow: none;
        margin-bottom: var(--spacing-md);
        display: block;
    }

    .article-card img {
        max-width: 100%;
        height: auto;
    }
}