:root {
    /* Color Variables - Clean Corporate Theme */
    --color-bg: #ffffff;
    --color-text: #2d3436;
    --color-text-muted: #636e72;
    --color-primary: #0984e3;
    --color-primary-hover: #0769b5;
    --color-secondary: #dfe6e9;
    --color-accent: #00b894;
    --color-border: #e0e0e0;
    --color-card-bg: #f5f6fa;
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --color-bg: #1e272e;
    --color-text: #dfe6e9;
    --color-text-muted: #b2bec3;
    --color-primary: #74b9ff;
    --color-primary-hover: #0984e3;
    --color-secondary: #2d3436;
    --color-accent: #55efc4;
    --color-border: #444;
    --color-card-bg: #2f3640;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
}

/* Base Stylings */
body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-top: 0;
    color: var(--color-primary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Layout */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

main {
    padding: 40px 0;
    min-height: calc(100vh - 160px);
}

/* Header */
header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.logo a {
    color: var(--color-text);
    transition: color 0.3s;
}

/* Navigation */
#main-nav {
    display: flex;
    gap: 20px;
}

#main-nav a {
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.9rem;
    padding: 5px 10px;
    border-radius: 4px;
}

#main-nav a:hover,
#main-nav a.active {
    color: var(--color-primary);
    background-color: var(--color-secondary);
    text-decoration: none;
}

/* Header Controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle, .menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--color-text);
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.theme-toggle:hover, .menu-toggle:hover {
    background-color: var(--color-secondary);
}

.menu-toggle {
    display: none;
}

/* Footer */
footer {
    background-color: var(--color-card-bg);
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
    margin-top: 40px;
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    color: var(--color-text-muted);
}

.footer-links {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    #main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        padding: 20px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    #main-nav.active {
        display: flex;
    }
}

/* Blog & Content Styles */
article {
    background-color: var(--color-bg);
    max-width: 800px;
    margin: 0 auto;
}

.blog-post h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.post-meta {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
}

.blog-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.blog-content p {
    margin-bottom: 1.5rem;
}

.blog-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
}

.blog-content blockquote {
    border-left: 4px solid var(--color-primary);
    margin: 1.5rem 0;
    padding-left: 1.5rem;
    font-style: italic;
    color: var(--color-text-muted);
}

/* Card Grid for Resources/Blog Lists */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.card {
    background-color: var(--color-card-bg);
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--color-border);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.card p {
    color: var(--color-text-muted);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 5px;
    font-weight: 600;
}

.btn:hover {
    background-color: var(--color-primary-hover);
    text-decoration: none;
    color: white;
}

/* Two-column grid layout for Home/Blog */
.main-content-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    margin-bottom: 2rem;
}

.main-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    order: 1;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    order: 2;
}

.sidebar-post {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-post:last-child {
    border-bottom: none;
}

.sidebar-post h4 {
    margin: 0 0 0.25rem 0;
    font-size: 0.95rem;
    font-weight: 600;
}

.sidebar-post h4 a {
    color: var(--color-primary);
    text-decoration: none;
}

.sidebar-post h4 a:hover {
    color: var(--color-accent);
}

.sidebar-post .post-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.no-hover:hover {
    transform: none;
    box-shadow: none;
}

@media (max-width: 900px) {
    .main-content-grid {
        grid-template-columns: 1fr;
    }
}