/* ==========================================================================
   LITTORALICIOUS — Main Stylesheet
   A refined journal aesthetic with modern precision
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
    /* Typography Scale — Perfect Fourth (1.333) */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.333rem;
    --text-xl: 1.777rem;
    --text-2xl: 2.369rem;
    --text-3xl: 3.157rem;
    --text-4xl: 4.209rem;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Colors — Light Mode (Default) */
    --color-ink: #0a0a0a;
    --color-paper: #fafafa;
    --color-sea: #2d4a5e;
    --color-salt: #94a3b8;
    --color-border: #d4d4d4;
    --color-muted: #6b7280;
    --color-subtle: #f5f5f5;

    /* Font Stacks */
    --font-serif: Georgia, 'Times New Roman', Times, serif;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;

    /* Line Heights */
    --leading-tight: 1.2;
    --leading-snug: 1.35;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    /* Layout */
    --max-width-prose: 65ch;
    --max-width-content: 1200px;
    --max-width-wide: 1400px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-ink: #fafafa;
        --color-paper: #0a0a0a;
        --color-sea: #7ba3bd;
        --color-salt: #64748b;
        --color-border: #2a2a2a;
        --color-muted: #9ca3af;
        --color-subtle: #111111;
    }
}

/* Manual Dark Mode Toggle */
[data-theme="dark"] {
    --color-ink: #fafafa;
    --color-paper: #0a0a0a;
    --color-sea: #7ba3bd;
    --color-salt: #64748b;
    --color-border: #2a2a2a;
    --color-muted: #9ca3af;
    --color-subtle: #111111;
}

/* --------------------------------------------------------------------------
   ANNOTATION COLORS — Evidence-based color coding for memory retention
   Research shows color-coding improves retention by ~11.5% (PMC 2022)
   -------------------------------------------------------------------------- */
:root {
    /* Annotation palette - muted, professional, print-friendly */
    --note-key: #fff3cd;           /* Warm yellow - key points */
    --note-key-border: #d4a816;
    --note-science: #e8f4f8;       /* Cool blue - evidence/data */
    --note-science-border: #5c9ead;
    --note-action: #e8f5e9;        /* Soft green - practical takeaways */
    --note-action-border: #4caf50;
    --note-warning: #fce4e4;       /* Pale red - warnings/cautions */
    --note-warning-border: #c0392b;
    --note-quote: #f3e5f5;         /* Lavender - quotes/references */
    --note-quote-border: #7b1fa2;

    /* Inline highlights */
    --highlight-key: #fff59d;      /* Yellow highlight */
    --highlight-term: #b3e5fc;     /* Blue highlight for terms */
}

[data-theme="dark"] {
    --note-key: #3d3200;
    --note-key-border: #d4a816;
    --note-science: #1a3a44;
    --note-science-border: #5c9ead;
    --note-action: #1b3d1e;
    --note-action-border: #4caf50;
    --note-warning: #3d1a1a;
    --note-warning-border: #e57373;
    --note-quote: #2d1f33;
    --note-quote-border: #ba68c8;

    --highlight-key: #5c5200;
    --highlight-term: #1a4a5c;
}

/* --------------------------------------------------------------------------
   BASE ELEMENTS
   -------------------------------------------------------------------------- */
body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-ink);
    background-color: var(--color-paper);
    min-height: 100vh;
}

/* Selection */
::selection {
    background-color: var(--color-sea);
    color: var(--color-paper);
}

/* Links */
a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-sea);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --------------------------------------------------------------------------
   TYPOGRAPHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

/* Article Typography */
.prose {
    max-width: var(--max-width-prose);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.prose p {
    margin-bottom: var(--space-6);
}

.prose h2 {
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    font-size: var(--text-xl);
}

.prose h3 {
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
    font-size: var(--text-lg);
}

.prose a {
    color: var(--color-sea);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.prose a:hover {
    text-decoration: none;
}

.prose strong {
    font-weight: 600;
}

.prose em {
    font-style: italic;
}

.prose blockquote {
    margin: var(--space-8) 0;
    padding-left: var(--space-6);
    border-left: 2px solid var(--color-border);
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--color-muted);
}

.prose ul, .prose ol {
    margin: var(--space-6) 0;
    padding-left: var(--space-6);
}

.prose li {
    margin-bottom: var(--space-2);
}

.prose code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-subtle);
    padding: 0.1em 0.3em;
    border-radius: 2px;
}

.prose pre {
    margin: var(--space-6) 0;
    padding: var(--space-4);
    background: var(--color-subtle);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}

.prose pre code {
    background: none;
    padding: 0;
}

/* Data Typography — Monospace for precision */
.data, .temperature, .ratio, .time {
    font-family: var(--font-mono);
    font-size: 0.95em;
    letter-spacing: 0.02em;
}

.temperature::after {
    content: '°C';
    font-size: 0.85em;
    margin-left: 0.1em;
}

/* --------------------------------------------------------------------------
   LAYOUT
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container--wide {
    max-width: var(--max-width-wide);
}

.container--prose {
    max-width: var(--max-width-prose);
}

/* --------------------------------------------------------------------------
   HEADER — Refined Journal Masthead
   -------------------------------------------------------------------------- */
.masthead {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border);
}

.masthead__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.masthead__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.masthead__logo {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 400;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    text-align: center;
}

.masthead__tagline {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-muted);
    margin-top: var(--space-1);
}

.masthead__description {
    display: block;
    font-size: var(--text-sm);
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--color-sea);
    margin-top: var(--space-2);
}

.masthead__nav {
    display: flex;
    gap: var(--space-6);
    margin-top: var(--space-4);
}

.masthead__nav a {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    transition: color var(--transition-fast);
}

.masthead__nav a:hover,
.masthead__nav a.active {
    color: var(--color-ink);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .masthead__inner {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .masthead__nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-4);
    }
}

/* --------------------------------------------------------------------------
   SECTION DIVIDERS — Old Journal Style
   -------------------------------------------------------------------------- */
.divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-12) 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.divider__text {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   ARTICLE CARDS — Dispatch Style
   -------------------------------------------------------------------------- */
.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.article-card {
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border);
}

.article-card:last-child {
    border-bottom: none;
}

.article-card__meta {
    display: flex;
    gap: var(--space-4);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    margin-bottom: var(--space-3);
}

.article-card__category {
    color: var(--color-sea);
}

.article-card__title {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-weight: 400;
    line-height: var(--leading-snug);
    margin-bottom: var(--space-3);
}

.article-card__title a:hover {
    color: var(--color-sea);
}

.article-card__excerpt {
    color: var(--color-muted);
    line-height: var(--leading-normal);
    max-width: var(--max-width-prose);
}

/* Featured Article */
.article-card--featured {
    padding: var(--space-8);
    background: var(--color-subtle);
    border-bottom: none;
}

.article-card--featured .article-card__title {
    font-size: var(--text-2xl);
}

/* --------------------------------------------------------------------------
   ARTICLE PAGE
   -------------------------------------------------------------------------- */
.article-header {
    padding: var(--space-16) 0 var(--space-8);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-8);
}

.article-header__category {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-sea);
    margin-bottom: var(--space-4);
}

.article-header__title {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 400;
    line-height: var(--leading-tight);
    max-width: 18ch;
    margin: 0 auto var(--space-6);
}

.article-header__meta {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.article-header__meta span::before {
    content: '·';
    margin-right: var(--space-4);
}

.article-header__meta span:first-child::before {
    display: none;
}

/* Article Body */
.article-body {
    padding: var(--space-8) 0 var(--space-16);
}

/* --------------------------------------------------------------------------
   DISPATCH — Short News Items
   -------------------------------------------------------------------------- */
.dispatch {
    padding: var(--space-6);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.dispatch__date {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-muted);
    margin-bottom: var(--space-2);
}

.dispatch__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-3);
}

.dispatch__body {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-muted);
}

.dispatch__source {
    margin-top: var(--space-3);
    font-size: var(--text-xs);
    color: var(--color-salt);
}

.dispatch__source a {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   SCIENCE CALLOUT — Technical Data Boxes
   -------------------------------------------------------------------------- */
.science-box {
    padding: var(--space-6);
    background: var(--color-subtle);
    border-left: 3px solid var(--color-sea);
    margin: var(--space-8) 0;
}

.science-box__label {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-sea);
    margin-bottom: var(--space-2);
}

.science-box__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-3);
}

.science-box__content {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}

/* Data Table */
.data-table {
    width: 100%;
    margin: var(--space-6) 0;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.data-table th,
.data-table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    font-weight: 600;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
}

.data-table td.data {
    font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-12) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-16);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-8);
}

.footer__brand {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.footer__description {
    font-size: var(--text-base);
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--color-sea);
    margin-bottom: var(--space-2);
}

.footer__tagline {
    font-size: var(--text-sm);
    color: var(--color-muted);
    max-width: 30ch;
}

.footer__links {
    display: flex;
    gap: var(--space-8);
}

.footer__col h4 {
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    margin-bottom: var(--space-3);
}

.footer__col ul {
    list-style: none;
}

.footer__col li {
    margin-bottom: var(--space-2);
}

.footer__col a {
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.footer__col a:hover {
    color: var(--color-ink);
}

/* Footer Newsletter Signup */
.footer__newsletter {
    padding-bottom: var(--space-8);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border);
}

.footer-newsletter-form label {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    display: block;
    margin-bottom: var(--space-3);
}

.footer-newsletter-form__row {
    display: flex;
    gap: var(--space-3);
    max-width: 400px;
}

.footer-newsletter-form__row input[type="email"] {
    border: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    background: var(--color-paper);
    color: var(--color-ink);
    width: 100%;
}

.footer-newsletter-form__row input[type="email"]:focus {
    border-color: var(--color-sea);
    outline: none;
}

.footer-newsletter-form__row button[type="submit"] {
    background: var(--color-sea);
    color: var(--color-paper);
    border: 2px solid var(--color-sea);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.footer-newsletter-form__row button[type="submit"]:hover {
    background: transparent;
    color: var(--color-sea);
}

[data-theme="dark"] .footer-newsletter-form__row input[type="email"] {
    background: var(--color-subtle);
    color: var(--color-ink);
    border-color: var(--color-salt);
}

@media (max-width: 768px) {
    .footer-newsletter-form__row {
        flex-direction: column;
    }

    .footer-newsletter-form__row button[type="submit"] {
        width: 100%;
    }
}

.footer__legal {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-xs);
    color: var(--color-muted);
}

@media (max-width: 768px) {
    .footer__inner {
        flex-direction: column;
    }

    .footer__links {
        flex-direction: column;
        gap: var(--space-6);
    }
}

/* --------------------------------------------------------------------------
   UTILITIES
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-muted); }
.text-sea { color: var(--color-sea); }
.text-mono { font-family: var(--font-mono); }
.text-serif { font-family: var(--font-serif); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.1em; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --------------------------------------------------------------------------
   ANNOTATION BOXES — Evidence-based callouts for better retention
   Based on color-coding research showing 11.5% improvement in recall
   -------------------------------------------------------------------------- */

/* Base note/callout style */
.note {
    position: relative;
    margin: var(--space-6) 0;
    padding: var(--space-4) var(--space-6);
    border-left: 4px solid var(--color-border);
    background: var(--color-subtle);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}

.note::before {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: var(--font-sans);
}

.note p:last-child {
    margin-bottom: 0;
}

/* Key Point — What you must remember */
.note--key,
.note-key {
    background: var(--note-key);
    border-color: var(--note-key-border);
}

.note--key::before,
.note-key::before {
    content: "Key Point";
    color: var(--note-key-border);
}

/* Science/Evidence — Data and research */
.note--science,
.note-science {
    background: var(--note-science);
    border-color: var(--note-science-border);
}

.note--science::before,
.note-science::before {
    content: "The Science";
    color: var(--note-science-border);
}

/* Action/Takeaway — Practical application */
.note--action,
.note-action {
    background: var(--note-action);
    border-color: var(--note-action-border);
}

.note--action::before,
.note-action::before {
    content: "Takeaway";
    color: var(--note-action-border);
}

/* Warning/Caution — Things to avoid */
.note--warning,
.note-warning {
    background: var(--note-warning);
    border-color: var(--note-warning-border);
}

.note--warning::before,
.note-warning::before {
    content: "Warning";
    color: var(--note-warning-border);
}

/* Quote/Reference — Citations and quotes */
.note--quote,
.note-quote {
    background: var(--note-quote);
    border-color: var(--note-quote-border);
    font-style: italic;
}

.note--quote::before,
.note-quote::before {
    content: "Reference";
    color: var(--note-quote-border);
    font-style: normal;
}

/* Custom label override */
.note[data-label]::before {
    content: attr(data-label);
}

/* Inline highlighting */
.highlight,
mark {
    background: var(--highlight-key);
    padding: 0.1em 0.25em;
    border-radius: 2px;
}

.highlight--term {
    background: var(--highlight-term);
}

/* Key term definition */
.term {
    font-weight: 600;
    color: var(--color-sea);
    border-bottom: 1px dotted var(--color-sea);
    cursor: help;
}

/* Summary box at end of article */
.summary-box {
    margin: var(--space-8) 0;
    padding: var(--space-6);
    background: var(--color-subtle);
    border: 2px solid var(--color-border);
}

.summary-box__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.summary-box__title::before {
    content: "📋";
    font-size: var(--text-xl);
}

.summary-box ul {
    margin: 0;
    padding-left: var(--space-6);
}

.summary-box li {
    margin-bottom: var(--space-2);
}

.summary-box li:last-child {
    margin-bottom: 0;
}

/* Quick reference card */
.quick-ref {
    margin: var(--space-8) 0;
    padding: var(--space-6);
    background: var(--color-ink);
    color: var(--color-paper);
}

.quick-ref__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-muted);
}

.quick-ref__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.quick-ref__item {
    font-size: var(--text-sm);
}

.quick-ref__label {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-salt);
    margin-bottom: var(--space-1);
}

.quick-ref__value {
    font-family: var(--font-mono);
    font-size: var(--text-base);
}

/* Article sources section */
.article-sources {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.article-sources strong {
    display: block;
    margin-bottom: var(--space-3);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-ink);
}

.article-sources p {
    margin-bottom: var(--space-1);
    line-height: var(--leading-normal);
}

/* Article table of contents */
.article-toc {
    margin: var(--space-6) 0;
    padding: var(--space-4) var(--space-6);
    background: var(--color-subtle);
    border-left: 3px solid var(--color-sea);
}

.article-toc__title {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    margin-bottom: var(--space-3);
}

.article-toc ol {
    margin: 0;
    padding-left: var(--space-6);
    font-size: var(--text-sm);
}

.article-toc li {
    margin-bottom: var(--space-2);
}

.article-toc a {
    color: var(--color-ink);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

.article-toc a:hover {
    border-bottom-color: var(--color-sea);
}

/* Data tables - improved readability */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: var(--text-sm);
}

.data-table th {
    text-align: left;
    padding: var(--space-3);
    background: var(--color-subtle);
    border-bottom: 2px solid var(--color-ink);
    font-weight: 600;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.data-table tr:hover {
    background: var(--color-subtle);
}

.data-table .num {
    font-family: var(--font-mono);
    text-align: right;
}

/* Marginal notes - for additional context */
.marginal {
    font-size: var(--text-xs);
    color: var(--color-muted);
    font-style: italic;
    margin: var(--space-2) 0;
    padding-left: var(--space-4);
    border-left: 2px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   PRINT STYLES — Optimized for paper output
   -------------------------------------------------------------------------- */
@media print {
    /* Reset colors for print */
    :root {
        --color-ink: #000 !important;
        --color-paper: #fff !important;
        --color-muted: #555 !important;
        --color-border: #ccc !important;
        --color-subtle: #f5f5f5 !important;
    }

    /* Hide non-essential elements */
    .masthead__nav,
    .footer__links,
    .footer__newsletter,
    .article-engagement,
    .article-share,
    .article-comments,
    .article-reactions,
    .print-hide {
        display: none !important;
    }

    /* Page setup */
    @page {
        margin: 2cm;
        size: A4;
    }

    body {
        font-size: 11pt;
        line-height: 1.5;
    }

    /* Ensure page breaks don't split elements */
    .note,
    .summary-box,
    .quick-ref,
    h2, h3, h4 {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    h2, h3, h4 {
        break-after: avoid;
        page-break-after: avoid;
    }

    /* Print-friendly note boxes */
    .note {
        border: 1px solid #999;
        background: #f9f9f9 !important;
    }

    .note--key { border-left: 4px solid #d4a816 !important; }
    .note--science { border-left: 4px solid #5c9ead !important; }
    .note--action { border-left: 4px solid #4caf50 !important; }
    .note--warning { border-left: 4px solid #c0392b !important; }

    /* Show URLs for links */
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
        word-break: break-all;
    }

    /* Article header for print */
    .article__header {
        border-bottom: 2px solid #000;
        margin-bottom: 1cm;
        padding-bottom: 0.5cm;
    }

    /* Footer info */
    .footer {
        border-top: 1px solid #ccc;
        padding-top: 0.5cm;
        margin-top: 1cm;
    }

    .footer__brand {
        font-size: 10pt;
    }

    .footer__description,
    .footer__tagline {
        font-size: 9pt;
    }
}

/* Print button */
.print-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-family: var(--font-sans);
    color: var(--color-muted);
    background: transparent;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.print-btn:hover {
    color: var(--color-ink);
    border-color: var(--color-ink);
}

.print-btn svg {
    width: 16px;
    height: 16px;
}

/* Download/Save button */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-family: var(--font-sans);
    color: var(--color-paper);
    background: var(--color-sea);
    border: 1px solid var(--color-sea);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.download-btn:hover {
    background: transparent;
    color: var(--color-sea);
}

.download-btn svg {
    width: 16px;
    height: 16px;
}

/* Article actions bar */
.article-actions {
    display: flex;
    gap: var(--space-3);
    margin: var(--space-6) 0;
    padding: var(--space-4) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

@media print {
    .article-actions {
        display: none !important;
    }
}

/* --------------------------------------------------------------------------
   ARTICLE ENGAGEMENT — Reactions, Comments, Subscribe
   -------------------------------------------------------------------------- */
.article-engagement {
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

/* Reactions */
.article-reactions {
    margin-bottom: var(--space-8);
}

.article-reactions__question,
.reactions-prompt {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
}

.article-reactions__buttons,
.reactions-buttons {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.reaction-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.reaction-btn:hover {
    border-color: var(--color-ink);
}

.reaction-btn.active {
    background: var(--color-ink);
    color: var(--color-paper);
    border-color: var(--color-ink);
}

.reaction-btn svg {
    width: 18px;
    height: 18px;
}

.article-reactions__stats {
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.article-reactions__bar {
    height: 4px;
    background: var(--color-border);
    margin-top: var(--space-2);
    overflow: hidden;
}

.article-reactions__bar-fill {
    height: 100%;
    background: var(--color-sea);
    transition: width var(--transition-base);
}

/* Comments Section */
.article-comments {
    margin-top: var(--space-8);
}

.article-comments__title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
}

.comment-form {
    margin-bottom: var(--space-8);
}

.comment-form__row {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.comment-form__row--full {
    flex-direction: column;
}

.comment-form input,
.comment-form textarea {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--color-sea);
}

.comment-form textarea {
    min-height: 120px;
    resize: vertical;
}

.comment-form__subscribe {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.comment-form__subscribe input[type="checkbox"] {
    width: 18px;
    height: 18px;
    flex: none;
}

.comment-form button[type="submit"] {
    background: var(--color-ink);
    color: var(--color-paper);
    border: none;
    padding: var(--space-3) var(--space-8);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.comment-form button[type="submit"]:hover {
    opacity: 0.85;
}

/* Comment List */
.comment-list {
    list-style: none;
}

.comment {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
}

.comment:last-child {
    border-bottom: none;
}

.comment__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-2);
}

.comment__author {
    font-weight: 600;
    font-size: var(--text-sm);
}

.comment__date {
    font-size: var(--text-xs);
    color: var(--color-muted);
}

.comment__body {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-ink);
}

.comment--new {
    background: var(--color-subtle);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Share Section */
.article-share {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.article-share__title,
.share-label {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
}

.article-share__buttons {
    display: flex;
    gap: var(--space-3);
}

/* Comments Title */
.comments-title {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
}

/* Comment Form Footer */
.comment-form__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-4);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-ink);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: var(--color-ink);
    color: var(--color-paper);
    border-color: var(--color-ink);
}

.share-btn svg {
    width: 18px;
    height: 18px;
}

/* --------------------------------------------------------------------------
   COMMUNITY ENGAGEMENT — Firebase-backed reactions, comments, voting
   -------------------------------------------------------------------------- */

/* Reaction counts */
.reaction-count {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    min-width: 1.5em;
    text-align: center;
}

/* Community Pulse */
.community-pulse {
    margin-bottom: var(--space-6);
    padding: var(--space-3) 0;
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.community-pulse__count {
    font-weight: 600;
}

/* Comments Sort Controls */
.comments-sort {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-3);
}

.comments-sort__btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    cursor: pointer;
    padding: var(--space-1) var(--space-2);
    transition: color var(--transition-fast);
}

.comments-sort__btn:hover {
    color: var(--color-ink);
}

.comments-sort__btn.active {
    color: var(--color-ink);
    border-bottom: 2px solid var(--color-sea);
}

/* Comment Voting */
.comment__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

.comment-vote-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    color: var(--color-muted);
    cursor: pointer;
    padding: var(--space-1);
    transition: color var(--transition-fast);
}

.comment-vote-btn:hover {
    color: var(--color-ink);
}

.comment-vote-btn.active {
    color: var(--color-sea);
}

.comment-vote-btn svg {
    width: 14px;
    height: 14px;
}

.comment-vote-count {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
}

/* Reply button */
.comment-reply-btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    cursor: pointer;
    padding: var(--space-1);
    transition: color var(--transition-fast);
}

.comment-reply-btn:hover {
    color: var(--color-sea);
}

/* Reply threading */
.comment--reply {
    margin-left: var(--space-6);
    padding-left: var(--space-4);
    border-left: 2px solid var(--color-border);
}

.comment__replies {
    margin-top: var(--space-2);
}

/* Reply form */
.reply-form {
    margin: var(--space-3) 0;
    padding-left: var(--space-6);
    border-left: 2px solid var(--color-sea);
    animation: fadeIn 0.3s ease;
}

.reply-form textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    min-height: 80px;
    resize: vertical;
    margin-top: var(--space-2);
}

.reply-form textarea:focus {
    outline: none;
    border-color: var(--color-sea);
}

.reply-form input[type="text"] {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
}

.reply-form input[type="text"]:focus {
    outline: none;
    border-color: var(--color-sea);
}

.reply-form__actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.reply-form__actions button[type="submit"] {
    background: var(--color-ink);
    color: var(--color-paper);
    border: none;
    padding: var(--space-2) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.reply-form__actions button[type="submit"]:hover {
    opacity: 0.85;
}

.reply-cancel-btn {
    background: none;
    border: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.reply-cancel-btn:hover {
    color: var(--color-ink);
    border-color: var(--color-ink);
}

/* Loading states */
.comments-loading,
.comments-empty {
    font-size: var(--text-sm);
    color: var(--color-muted);
    font-style: italic;
    padding: var(--space-4) 0;
}