/* Starlight Longevity - Educational & Informational Site */
/* Design Philosophy: Minimal, Academic, Neutral, Readability-First */

:root {
    --bg-color: #fcfcfc;
    --text-color: #333;
    --heading-color: #1a1a1a;
    --accent-color: #2c5282; /* Muted academic blue */
    --link-color: #2b6cb0;
    --border-color: #e2e8f0;
    --disclaimer-bg: #f7fafc;
    --disclaimer-border: #cbd5e0;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    --max-width: 800px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.7;
    margin: 0;
    padding: 0;
}

header, footer {
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
}

footer {
    border-bottom: none;
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
    font-size: 0.9rem;
    color: #666;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 0.5rem 0 0 0;
}

nav a {
    text-decoration: none;
    color: var(--heading-color);
    font-weight: 500;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    color: var(--heading-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 {
    font-size: 2.25rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }

p {
    margin-bottom: 1.25rem;
}

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

a:hover {
    text-decoration: underline;
}

/* Disclaimer Component - CRITICAL */
.disclaimer-box {
    background-color: var(--disclaimer-bg);
    border: 1px solid var(--disclaimer-border);
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 4px;
    font-size: 0.9rem;
}

.disclaimer-box strong {
    display: block;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

/* Lists */
ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Utility */
.site-title a {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}

.date {
    color: #718096;
    font-size: 0.875rem;
    display: block;
    margin-top: -0.5rem;
    margin-bottom: 1.5rem;
}

blockquote {
    border-left: 4px solid var(--accent-color);
    margin: 1.5rem 0;
    padding-left: 1rem;
    font-style: italic;
    color: #4a5568;
}

/* Section specific */
.glossary-term {
    font-weight: bold;
    color: var(--accent-color);
}

@media (max-width: 600px) {
    h1 { font-size: 1.875rem; }
    nav ul { gap: 1rem; }
}