/*
 * anttilahughes.org theme stylesheet
 * Minimal academic design with Wikipedia-style links and Noto fonts
 */

/* ========================================
   CSS CUSTOM PROPERTIES (Light Mode Default)
   ======================================== */

:root {
  /* Wikipedia link colors */
  --color-link: #0645ad;
  --color-link-visited: #0b0080;
  --color-link-hover: #3366cc;

  /* Background and text */
  --color-bg: #fefefe;
  --color-bg-alt: #f9f9f9;
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-border: #ccc;
  --color-border-light: #e5e5e5;
  --color-code-bg: #f5f5f5;

  /* Typography */
  --font-serif: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --font-sans: 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-mono: 'Noto Sans Mono', 'Courier New', monospace;

  /* Font sizes */
  --font-size-base: 17px;
  --font-size-small: 0.85rem;
  --font-size-h1: 1.8rem;
  --font-size-h2: 1.4rem;
  --font-size-h3: 1.2rem;
  --font-size-h4: 1.1rem;

  /* Line height and measure */
  --line-height: 1.65;
  --max-width: 750px;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
}

/* ========================================
   DARK MODE
   ======================================== */

[data-theme="dark"] {
  --color-bg: #1a1a1a;
  --color-bg-alt: #222;
  --color-text: #e0e0d8;
  --color-text-muted: #a0a098;
  --color-link: #6b9eff;
  --color-link-visited: #b4a7d6;
  --color-link-hover: #9fc5ff;
  --color-border: #444;
  --color-border-light: #333;
  --color-code-bg: #2a2a2a;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #1a1a1a;
    --color-bg-alt: #222;
    --color-text: #e0e0d8;
    --color-text-muted: #a0a098;
    --color-link: #6b9eff;
    --color-link-visited: #b4a7d6;
    --color-link-hover: #9fc5ff;
    --color-border: #444;
    --color-border-light: #333;
    --color-code-bg: #2a2a2a;
  }
}

/* ========================================
   BASE STYLES
   ======================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: var(--spacing-lg);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ========================================
   LAYOUT
   ======================================== */

.site-wrapper,
.gh-viewport {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
}

.gh-main,
.site-content,
main,
.post-content,
.page-content,
.content {
  max-width: var(--max-width);
  margin: var(--spacing-xl) auto;
  padding: 0 var(--spacing-lg);
}

article {
  margin-bottom: var(--spacing-xxl);
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-h1); margin-top: 0; }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
  margin: 1em 0;
  text-align: left;
  hyphens: auto;
  -webkit-hyphens: auto;
}

h1 + p, h2 + p, h3 + p, h4 + p {
  text-indent: 0;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

blockquote {
  margin: var(--spacing-lg) 0 var(--spacing-lg) var(--spacing-md);
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-border);
  font-style: italic;
  color: var(--color-text-muted);
}

/* ========================================
   LINKS (Wikipedia style)
   ======================================== */

a {
  color: var(--color-link);
  text-decoration: underline;
  transition: color 0.2s ease;
}

a:visited {
  color: var(--color-link-visited);
}

a:hover, a:focus {
  color: var(--color-link-hover);
}

/* ========================================
   NAVIGATION / HEADER
   ======================================== */

header,
.gh-head {
  font-family: var(--font-sans);
  background-color: var(--color-bg) !important;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.3s ease;
}

.gh-head-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.gh-head-brand {
  margin-right: var(--spacing-lg);
}

.gh-head-menu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
}

.gh-head-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav,
.gh-head-menu ul {
  list-style: none !important;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  background-color: transparent !important;
}

.nav li,
.gh-head-menu li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.gh-head a,
.site-header a {
  color: var(--color-text);
  text-decoration: none;
}

.gh-head a:hover,
.site-header a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

.nav a,
.gh-head-menu a {
  font-size: var(--font-size-small);
  text-transform: lowercase;
  letter-spacing: 0.02em;
}

.nav-current a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-text);
}

.gh-head-logo {
  font-size: 1.25rem;
  font-weight: normal;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: none;
}

.gh-head-logo:hover {
  color: var(--color-link-hover);
}

.gh-head-logo img {
  max-height: 2rem;
  width: auto;
}

/* ========================================
   LISTS
   ======================================== */

ul, ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
}

dl {
  margin: var(--spacing-md) 0;
}

dt {
  font-weight: bold;
  margin-top: var(--spacing-sm);
}

dd {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   CODE
   ======================================== */

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code {
  background-color: var(--color-code-bg);
  padding: 0.15em 0.3em;
  border-radius: 2px;
}

pre {
  background-color: var(--color-code-bg);
  padding: var(--spacing-md);
  overflow-x: auto;
  border: 1px solid var(--color-border);
}

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

/* ========================================
   TABLES
   ======================================== */

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: var(--font-size-small);
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: bold;
  border-bottom-width: 2px;
}

/* ========================================
   IMAGES & FIGURES
   ======================================== */

img {
  max-width: 100%;
  height: auto;
}

.post-feature-image img,
.gh-article-image img,
.article-image img,
.kg-image-card img {
  max-width: 100%;
  height: auto;
  margin: var(--spacing-lg) auto;
  display: block;
}

figure {
  margin: var(--spacing-lg) 0;
}

figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
  text-align: center;
}

/* ========================================
   FOOTER
   ======================================== */

footer,
.gh-foot {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg) !important;
  transition: background-color 0.3s ease;
}

/* ========================================
   DARK MODE TOGGLE
   ======================================== */

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-serif);
  font-size: var(--font-size-small);
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.theme-toggle-icon {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  font-size: 1.2rem;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.theme-toggle-icon:hover {
  opacity: 1;
}

/* ========================================
   LANGUAGE SWITCHER
   ======================================== */

.lang-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 0.75rem;
}

.lang-switcher-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  opacity: 0.7;
  transition: opacity 0.2s ease;
  font-size: 1.1rem;
}

.lang-switcher-toggle:hover {
  opacity: 1;
}

.lang-switcher-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  z-index: 1000;
}

.lang-switcher.active .lang-switcher-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher-dropdown a {
  display: flex;
  align-items: center;
  padding: 0.6rem 0.9rem;
  color: var(--color-text) !important;
  text-decoration: none !important;
  font-size: 0.9rem;
  transition: background 0.15s ease;
}

.lang-switcher-dropdown a:first-child {
  border-radius: 6px 6px 0 0;
}

.lang-switcher-dropdown a:last-child {
  border-radius: 0 0 6px 6px;
}

.lang-switcher-dropdown a:hover {
  background: var(--color-bg-alt);
}

.lang-switcher-dropdown a.current {
  font-weight: 600;
  opacity: 0.6;
  pointer-events: none;
}

.lang-flag {
  margin-right: 0.6rem;
  font-size: 1.1rem;
}

.lang-name {
  flex: 1;
}

.lang-code {
  opacity: 0.5;
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-muted { color: var(--color-text-muted); }
.text-small { font-size: var(--font-size-small); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* ========================================
   ATTENTION CONSERVATION NOTICE
   ======================================== */

.attention-notice {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  padding: 0.75rem 1rem;
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-border);
}

/* ========================================
   PAPER/PUBLICATION STYLES
   ======================================== */

.paper {
  margin-bottom: var(--spacing-xl);
}

.paper-citation {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

.paper-links {
  font-family: var(--font-sans);
  font-size: var(--font-size-small);
  margin-top: var(--spacing-sm);
}

.paper-links a {
  margin-right: 0.75rem;
}

/* ========================================
   GHOST-SPECIFIC OVERRIDES
   ======================================== */

.kg-card {
  margin: var(--spacing-lg) 0;
  border: none !important;
  box-shadow: none !important;
}

.kg-image-card img {
  margin: 0 auto;
  display: block;
}

.kg-width-wide {
  position: relative;
  width: 85vw;
  min-width: 100%;
  margin: var(--spacing-lg) calc(50% - 42.5vw);
}

.kg-width-full {
  position: relative;
  width: 100vw;
  min-width: 100%;
  margin: var(--spacing-lg) calc(50% - 50vw);
}

.kg-width-wide img,
.kg-width-full img {
  width: 100%;
}

.kg-bookmark-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.kg-bookmark-title {
  color: var(--color-text);
}

.kg-bookmark-description {
  color: var(--color-text-muted);
}

.kg-button-card a {
  background: none !important;
  color: var(--color-link) !important;
  padding: 0 !important;
  border-radius: 0 !important;
  text-decoration: underline !important;
}

.post-meta,
.article-meta,
.gh-article-meta {
  font-family: var(--font-sans);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.post-excerpt {
  color: var(--color-text-muted);
}

/* Background overrides */
html, body, .gh-viewport, .site-wrapper, .gh-outer, .gh-inner {
  background-color: var(--color-bg) !important;
}

.gh-head, .gh-head-inner, .gh-head-brand, .gh-head-menu, .site-header, .site-nav {
  background-color: var(--color-bg) !important;
  background: var(--color-bg) !important;
}

.gh-foot, .gh-foot-inner, .site-footer {
  background-color: var(--color-bg) !important;
  background: var(--color-bg) !important;
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  a { color: black; text-decoration: underline; }

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

  .theme-toggle, .theme-toggle-icon, nav, .lang-switcher, .gh-head, .gh-foot {
    display: none;
  }
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */

@media (max-width: 600px) {
  :root {
    --font-size-base: 16px;
    --font-size-h1: 1.5rem;
    --font-size-h2: 1.25rem;
  }

  body {
    padding: var(--spacing-md);
  }

  .gh-main, .site-content, main {
    padding: 0 var(--spacing-md);
  }

  .gh-head-inner {
    flex-direction: column;
    text-align: center;
  }

  .gh-head-menu {
    justify-content: center;
  }

  .gh-head-menu .nav,
  .gh-head-menu ul {
    flex-direction: row !important;
    flex-wrap: wrap !important;
    gap: var(--spacing-sm) var(--spacing-md) !important;
    justify-content: center;
  }

  .gh-head-actions {
    margin-top: var(--spacing-sm);
  }

  .lang-switcher-dropdown {
    right: auto;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
  }

  .lang-switcher.active .lang-switcher-dropdown {
    transform: translateX(-50%) translateY(0);
  }
}