/* CSS Custom Properties */
:root {
    --accent: #8B2635;
    --accent-dark: #6B1D2A;
    --bg: #FAFAFA;
    --surface: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --border: #E5E5E5;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --radius: 8px;
    --container: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

/* Skip to content (a11y) */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

a:hover, a:focus {
    color: var(--accent-dark);
    text-decoration: underline;
    outline: none;
}

a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn:hover, .btn:focus {
    background: var(--accent-dark);
    color: white;
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-outline:hover, .btn-outline:focus {
    background: var(--accent);
    color: white;
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) 0;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

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

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

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link:focus {
    color: var(--accent);
    border-color: var(--accent);
    text-decoration: none;
}

@media (max-width: 640px) {
    .nav {
        gap: var(--spacing-sm);
        font-size: 0.875rem;
    }
}

/* Hero Section */
.hero {
    padding: clamp(3rem, 10vw, 6rem) 0;
    background: linear-gradient(135deg, var(--bg) 0%, #f5f0f0 100%);
    text-align: center;
}

.hero-headline {
    margin-bottom: var(--spacing-md);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-headline span {
    background: linear-gradient(135deg, var(--accent) 0%, #c73e54 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subhead {
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-secondary);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.125rem;
    padding: 1rem 2rem;
}

/* AdSense placeholder in hero */
.ad-placeholder {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--border);
    border-radius: var(--radius);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Topics Grid */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.topic-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all 0.2s ease;
    text-decoration: none;
}

.topic-card:hover, .topic-card:focus {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    text-decoration: none;
}

.topic-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.topic-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent) 0%, #c73e54 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.topic-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.topic-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Topic SVG icons */
.topic-icon svg {
    width: 24px;
    height: 24px;
}

/* Featured Articles */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

.article-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.2s ease;
    text-decoration: none;
}

.article-card:hover, .article-card:focus {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    text-decoration: none;
}

.article-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.article-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--border);
}

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

.article-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
}

.article-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-link {
    margin-top: auto;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.article-link svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.article-card:hover .article-link svg {
    transform: translateX(4px);
}

/* About Section */
.about {
    background: linear-gradient(135deg, #f5f0f0 0%, var(--bg) 100%);
    text-align: center;
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-content p:last-child {
    margin-bottom: var(--spacing-lg);
}

.about-cta {
    font-size: 1rem;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--bg);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-link {
    color: #999999;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.footer-link:hover, .footer-link:focus {
    color: white;
    text-decoration: underline;
}

.footer-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    color: white;
    text-decoration: underline;
}

.footer-copyright {
    color: #999999;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-links {
        justify-content: flex-end;
    }
}

/* Inline Ad Placeholder */
.ad-placeholder-inline {
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-md);
    background: var(--border);
    border-radius: var(--radius);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: var(--container);
}