/* ==========================================================================
   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;
}

/* --------------------------------------------------------------------------
   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;
    justify-content: space-between;
    align-items: center;
}

.masthead__brand {
    display: flex;
    flex-direction: column;
}

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

.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);
}

.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__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;
}

/* --------------------------------------------------------------------------
   PRINT STYLES
   -------------------------------------------------------------------------- */
@media print {
    .masthead__nav,
    .footer__links {
        display: none;
    }

    .article-header,
    .article-body {
        padding: 0;
    }

    a {
        text-decoration: underline;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: var(--color-muted);
    }
}