/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ink: #1a1a1a;
    --paper: #fbfdfb;
    --accent: #2d6a4f;
    --muted: #5b615c;
    --line: #e4e6e4;
}

body {
    font-family: 'Instrument Serif', Georgia, serif;
    background: var(--paper);
    background-image:
        linear-gradient(180deg, rgba(74, 124, 148, 0.05) 0%, rgba(74, 124, 148, 0) 26%),
        linear-gradient(120deg, rgba(45, 106, 79, 0.03) 0%, rgba(45, 106, 79, 0) 44%);
    color: var(--ink);
    min-height: 100vh;
    line-height: 1.6;
    padding: 1.5rem;
}

/* Navigation */
.back-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--muted);
    text-decoration: none;
    display: inline-block;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent);
}

/* Header */
.header {
    max-width: 1200px;
    margin: 0 auto 2.5rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--line);
}

.title-card h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.title-card h1 em {
    font-style: italic;
    color: var(--accent);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--muted);
    font-style: italic;
    margin-bottom: 0.875rem;
}

.title-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.attribution {
    font-style: normal;
}

.methods-link {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.methods-link:hover {
    opacity: 0.7;
}

/* R Markdown Content Container */
.rmd-content {
    max-width: 800px;
    margin: 0 auto 3rem;
    background: white;
    padding: 3rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--line);
}

/* Override R Markdown paragraph styles */
.rmd-content p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
    text-align: left;
}

/* Override R Markdown link styles */
.rmd-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    word-break: break-word;
}

.rmd-content a:hover {
    opacity: 0.7;
}

/* Figures and Images from R Markdown */
.rmd-content figure {
    margin: 2.5rem auto;
    max-width: 100%;
}

.rmd-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border: 1px solid var(--line);
    background: var(--paper);
    padding: 0.5rem;
}

.rmd-content figcaption {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 300;
    letter-spacing: 0.02em;
    color: var(--muted);
    text-align: center;
    margin-top: 0.75rem;
    font-style: italic;
    opacity: 0.85;
}

/* Override any inline Bootstrap/R Markdown styles */
.rmd-content .container-fluid {
    padding: 0;
}

/* Code blocks if any */
.rmd-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    background: rgba(0, 0, 0, 0.05);
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

.rmd-content pre {
    font-family: 'JetBrains Mono', monospace;
    background: rgba(0, 0, 0, 0.05);
    padding: 1rem;
    overflow-x: auto;
    border-radius: 4px;
    margin: 1.5rem 0;
}

.rmd-content pre code {
    background: transparent;
    padding: 0;
}

/* Tables if any */
.rmd-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.95rem;
}

.rmd-content table th,
.rmd-content table td {
    padding: 0.75rem;
    border: 1px solid var(--line);
    text-align: left;
}

.rmd-content table th {
    background: rgba(0, 0, 0, 0.05);
    font-weight: 500;
}

/* Lists */
.rmd-content ul,
.rmd-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.rmd-content li {
    margin-bottom: 0.5rem;
}

/* Headings within content */
.rmd-content h2,
.rmd-content h3,
.rmd-content h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 400;
    color: var(--ink);
}

.rmd-content h2 {
    font-size: 1.75rem;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.5rem;
}

.rmd-content h3 {
    font-size: 1.4rem;
}

.rmd-content h4 {
    font-size: 1.2rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .header {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }

    .title-card h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .title-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .rmd-content {
        font-size: 0.95rem;
        padding: 1.5rem;
    }

    .rmd-content img {
        margin: 1.5rem 0;
    }
}