:root {
    --color-primary: #1a1a1a;
    --color-secondary: #555555;
    --color-background: #ffffff;
    --color-surface: #f4f4f4;
    --color-link: #0044cc;
    --color-border: #e0e0e0;
    --font-heading: 'Merriweather', Georgia, serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --max-width: 960px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--color-background);
    color: var(--color-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

h1 { font-size: 2.25rem; margin-top: var(--spacing-lg); }
h2 { font-size: 1.75rem; margin-top: var(--spacing-md); border-bottom: 1px solid var(--color-border); padding-bottom: var(--spacing-xs); }
h3 { font-size: 1.5rem; margin-top: var(--spacing-md); }
p { margin-bottom: var(--spacing-sm); }
a { color: var(--color-link); text-decoration: none; transition: text-decoration 0.2s; }
a:hover { text-decoration: underline; }

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

header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
}

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

nav a {
    color: var(--color-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

nav a.active, nav a:hover {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 2px solid var(--color-primary);
}

/* Archive Grid */
.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.card h3 {
    font-size: 1.25rem;
    margin-top: 0;
}

.card-meta {
    font-size: 0.8rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--color-secondary);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.ymyl-disclaimer {
    font-style: italic;
    font-size: 0.8rem;
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-primary);
    background: transparent;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-primary:hover {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
}

/* Search Bar */
.search-container {
    margin: var(--spacing-md) 0;
    display: flex;
    gap: var(--spacing-xs);
}

.search-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    font-family: var(--font-body);
    font-size: 1rem;
}

.search-btn {
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    font-family: var(--font-heading);
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Print Styles */
@media print {
    body {
        font-size: 12pt;
        background: white;
        color: #1a1a1a;
    }

    header, footer, .search-container, .btn, .filter-container {
        display: none !important;
    }

    main {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }

    a {
        text-decoration: none;
        color: #1a1a1a;
    }

    /* Reveal links in print */
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }

    /* Hide redundant internal links */
    a[href^="#"]::after, a[href^="javascript:"]::after {
        content: "";
    }

    .citation-box {
        page-break-inside: avoid;
        border: 1px solid #1a1a1a;
    }

    .key-takeaways {
        border: 1px solid #1a1a1a !important;
        background: none !important;
    }
}

/* Typography Refinements */
body {
    font-size: clamp(1rem, 1.2vw, 1.2rem); /* Fluid sizing */
}

/* Glossary Styles */
.glossary-list dl {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.glossary-list dt {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.2em;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    border-left: 4px solid var(--color-link);
    padding-left: 0.8rem;
}

.glossary-list dd {
    margin-left: 0;
    padding-left: 1rem;
    color: var(--color-secondary);
    line-height: 1.7;
}