/* Import pixel fonts */
@import url('https://fonts.googleapis.com/css2?family=VT323&family=Press+Start+2P&family=Space+Mono:wght@400;700&display=swap');

/* ============================================
   THEME SWITCHER COMPONENT
   ============================================ */
.theme-switcher {
  position: relative;
}

.theme-switcher__toggle {
  padding: 0.5rem 1rem;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-switcher__toggle:hover {
  opacity: 0.8;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(255, 255, 255, 0.1);
}

.theme-switcher__label-prefix {
  opacity: 0.6;
  margin-right: 0.25rem;
}

.theme-switcher__current {
  font-weight: 600;
}

.theme-switcher__arrow {
  margin-left: 0.5rem;
  font-size: 0.7em;
  opacity: 0.6;
  transition: transform 0.2s;
}

.theme-switcher__toggle:hover .theme-switcher__arrow {
  transform: translateY(2px);
}

.theme-switcher__picker {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  min-width: 160px;
  border: 1px solid currentColor;
  background: var(--bg, #0a0a0a);
  z-index: 100;
}

.theme-switcher__option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: 0.875rem;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
}

.theme-switcher__option:hover {
  background: rgba(255, 255, 255, 0.1);
}

.theme-switcher__icon {
  width: 1.5rem;
  text-align: center;
  flex-shrink: 0;
}

.theme-switcher__option {
  flex-wrap: wrap;
}

.theme-switcher__label {
  font-weight: 600;
}

.theme-switcher__desc {
  width: 100%;
  padding-left: 2.25rem;
  font-size: 0.75rem;
  opacity: 0.6;
  margin-top: 0.125rem;
}

/* ============================================
   BASE THEME VARIABLES
   ============================================ */
:root {
  --bg: #0a0a0a;
  --fg: #33ff33;
  --fg-dim: #1a8c1a;
  --accent: #00ff00;
  --font: 'Space Mono', monospace;
}

/* ============================================
   TERMINAL THEME - Green phosphor CRT
   ============================================ */
html.terminal {
  --bg: #0a0a0a;
  --fg: #33ff33;
  --fg-dim: #1a8c1a;
  --accent: #00ff00;
  --font: 'Space Mono', monospace;

  /* Syntax highlighting tokens */
  --code-keyword: #00ff00;
  --code-string: #33ff33;
  --code-comment: #1a8c1a;
  --code-function: #00ff00;
  --code-class: #66ff66;
  --code-number: #00cc00;
  --code-operator: #00ff00;
  --code-variable: #33ff33;
  --code-constant: #66ff66;
  --code-builtin: #00ff00;
}

html.terminal body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
}

html.terminal .site-header {
  border-bottom: 1px solid var(--fg-dim);
  background: var(--bg);
}

html.terminal .site-header a { color: var(--fg); }
html.terminal .site-header a:hover { color: var(--accent); }

html.terminal .site-title {
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent);
}

html.terminal .site-subtitle { color: var(--fg-dim); }

html.terminal .article-card {
  border: 1px solid var(--fg-dim);
  background: rgba(0, 255, 0, 0.03);
}

html.terminal .article-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
}

html.terminal .article-title { color: var(--accent); }
html.terminal .article-title a { color: var(--accent); }
html.terminal .article-meta { color: var(--fg-dim); }
html.terminal .article-excerpt { color: var(--fg); }

html.terminal .tag {
  border: 1px solid var(--fg-dim);
  color: var(--fg);
}

html.terminal .read-more { color: var(--accent); }

html.terminal .site-footer {
  color: var(--fg-dim);
  border-top: 1px solid var(--fg-dim);
}

/* CRT scanlines effect */
html.terminal::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.15) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ============================================
   GAMING THEME - 8-bit retro
   ============================================ */
html.gaming {
  --bg: #1a1c2c;
  --fg: #a7f070;
  --fg-dim: #566c86;
  --accent: #ffcd75;
  --pink: #f04f78;
  --cyan: #36c5f4;
  --font: 'Press Start 2P', cursive;
  --font-body: 'VT323', monospace;

  /* Syntax highlighting tokens */
  --code-keyword: #f04f78;
  --code-string: #a7f070;
  --code-comment: #566c86;
  --code-function: #36c5f4;
  --code-class: #ffcd75;
  --code-number: #f7a21b;
  --code-operator: #f04f78;
  --code-variable: #a7f070;
  --code-constant: #ffcd75;
  --code-builtin: #36c5f4;
}

html.gaming body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1.25rem;
  image-rendering: pixelated;
}

html.gaming .site-header {
  border-bottom: 4px solid var(--accent);
  background: var(--bg);
  padding: 1rem;
}

html.gaming .site-header a {
  color: var(--fg);
  font-family: var(--font);
  font-size: 0.7rem;
}

html.gaming .site-title {
  color: var(--accent);
  font-family: var(--font);
  font-size: 1.2rem;
  line-height: 1.8;
}

html.gaming .site-subtitle {
  color: var(--cyan);
  font-family: var(--font);
  font-size: 0.6rem;
}

html.gaming .article-card {
  border: 4px solid var(--fg-dim);
  background: #262b44;
  box-shadow: 8px 8px 0 var(--fg-dim);
}

html.gaming .article-card:hover {
  border-color: var(--accent);
  box-shadow: 8px 8px 0 var(--accent);
  transform: translate(-2px, -2px);
}

html.gaming .article-title {
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.8rem;
  line-height: 1.6;
}

html.gaming .article-title a { color: var(--accent); }
html.gaming .article-meta { color: var(--fg-dim); }
html.gaming .article-excerpt { color: var(--fg); }

html.gaming .tag {
  border: 2px solid var(--pink);
  color: var(--pink);
  font-family: var(--font);
  font-size: 0.5rem;
}

html.gaming .read-more {
  color: var(--cyan);
  font-family: var(--font);
  font-size: 0.6rem;
}

html.gaming .site-footer {
  color: var(--fg-dim);
  border-top: 4px solid var(--fg-dim);
}

html.gaming .theme-switcher__toggle {
  font-family: var(--font);
  font-size: 0.6rem;
  border-width: 2px;
}

html.gaming .theme-switcher__picker {
  border-width: 2px;
}

html.gaming .theme-switcher__option {
  font-family: var(--font);
  font-size: 0.5rem;
}

/* ============================================
   SYNTHWAVE THEME - Neon retrowave
   ============================================ */
html.synthwave {
  --bg: #1a1a2e;
  --fg: #eee;
  --fg-dim: #8b8ba7;
  --pink: #ff2a6d;
  --cyan: #05d9e8;
  --purple: #7b2cbf;
  --font: 'Space Mono', monospace;

  /* Syntax highlighting tokens */
  --code-keyword: #ff2a6d;
  --code-string: #05d9e8;
  --code-comment: #8b8ba7;
  --code-function: #05d9e8;
  --code-class: #ff2a6d;
  --code-number: #f3e600;
  --code-operator: #ff2a6d;
  --code-variable: #05d9e8;
  --code-constant: #f3e600;
  --code-builtin: #7b2cbf;
}

html.synthwave body {
  background: linear-gradient(180deg, #1a1a2e 0%, #16213e 50%, #1a1a2e 100%);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100vh;
}

html.synthwave .site-header {
  border-bottom: 2px solid var(--pink);
  background: rgba(26, 26, 46, 0.9);
  box-shadow: 0 0 20px var(--pink);
}

html.synthwave .site-header a {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .site-title {
  color: var(--pink);
  text-shadow: 0 0 20px var(--pink), 0 0 40px var(--pink);
  font-weight: bold;
}

html.synthwave .site-subtitle {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .article-card {
  border: 1px solid var(--purple);
  background: rgba(123, 44, 191, 0.1);
  box-shadow: 0 0 15px rgba(123, 44, 191, 0.3);
}

html.synthwave .article-card:hover {
  border-color: var(--pink);
  box-shadow: 0 0 30px var(--pink);
}

html.synthwave .article-title {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .article-title a {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .article-meta { color: var(--fg-dim); }
html.synthwave .article-excerpt { color: var(--fg); }

html.synthwave .article-content strong {
  color: var(--pink);
  font-weight: bold;
  text-shadow: 0 0 8px var(--pink);
}

html.synthwave .tag {
  border: 1px solid var(--pink);
  color: var(--pink);
  text-shadow: 0 0 5px var(--pink);
}

html.synthwave .read-more {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .site-footer {
  color: var(--fg-dim);
  border-top: 2px solid var(--purple);
}

html.synthwave .article-content h1,
html.synthwave .article-content h2 {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

html.synthwave .theme-switcher__toggle {
  border-color: var(--pink);
  text-shadow: 0 0 5px currentColor;
}

html.synthwave .theme-switcher__picker {
  border-color: var(--pink);
  box-shadow: 0 0 15px var(--pink);
}

/* ============================================
   EARLY COMPUTING THEME - Apple II / DOS
   ============================================ */
html.early_computing {
  --bg: #000080;
  --fg: #fff;
  --fg-dim: #aaa;
  --accent: #ffff00;
  --cyan: #00ffff;
  --font: 'VT323', monospace;

  /* Syntax highlighting tokens */
  --code-keyword: #ffff00;
  --code-string: #00ffff;
  --code-comment: #aaaaaa;
  --code-function: #00ffff;
  --code-class: #ffff00;
  --code-number: #ffffff;
  --code-operator: #ffff00;
  --code-variable: #00ffff;
  --code-constant: #ffff00;
  --code-builtin: #00ffff;
}

html.early_computing body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 1.4rem;
}

html.early_computing .site-header {
  border-bottom: 2px double var(--fg);
  background: var(--bg);
}

html.early_computing .site-header a { color: var(--cyan); }

html.early_computing .site-title {
  color: var(--accent);
}

html.early_computing .site-subtitle { color: var(--fg-dim); }

html.early_computing .article-card {
  border: 2px solid var(--fg);
  background: var(--bg);
}

html.early_computing .article-card:hover {
  background: #0000aa;
}

html.early_computing .article-title { color: var(--accent); }
html.early_computing .article-title a { color: var(--accent); }
html.early_computing .article-meta { color: var(--fg-dim); }
html.early_computing .article-excerpt { color: var(--fg); }

html.early_computing .tag {
  border: 1px solid var(--cyan);
  color: var(--cyan);
}

html.early_computing .read-more { color: var(--cyan); }

html.early_computing .site-footer {
  color: var(--fg-dim);
  border-top: 2px double var(--fg);
}

/* Blinking cursor effect */
html.early_computing .cursor-blink::after {
  content: '█';
  animation: blink 1s step-start infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ============================================
   ARTICLE CONTENT STYLING (all themes)
   ============================================ */
.article-content {
  line-height: 1.8;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--accent, currentColor);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: bold;
}

.article-content h2 { font-size: 1.5rem; }
.article-content h3 { font-size: 1.25rem; }

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  list-style-type: disc;
}

.article-content ol {
  list-style-type: decimal;
}

.article-content li {
  margin-bottom: 1rem;
  padding-left: 0.5rem;
}

/* Topic list for about page */
.article-content ul.topic-list {
  list-style: none;
  padding-left: 0;
}

.article-content ul.topic-list li {
  margin-bottom: 1.25rem;
  padding-left: 0;
}

.article-content a {
  color: var(--cyan, var(--accent, #05d9e8));
  text-decoration: underline;
}

.article-content code {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

.article-content pre {
  background: rgba(0, 0, 0, 0.3);
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

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

.article-content blockquote {
  border-left: 3px solid var(--accent, currentColor);
  padding-left: 1rem;
  margin-left: 0;
  margin-bottom: 1.25rem;
  opacity: 0.9;
}

.article-content strong {
  color: var(--accent, currentColor);
}

/* Gaming theme specific content styles */
html.gaming .article-content h2,
html.gaming .article-content h3 {
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1.6;
}

html.gaming .article-content {
  font-size: 1.1rem;
}

/* Tag link styling */
.tag a {
  color: inherit;
  text-decoration: none;
}

/* Clickable card styling */
a.article-card {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

a.article-card:hover {
  text-decoration: none;
}

/* ============================================
   SYNTAX HIGHLIGHTING (Rouge tokens)
   ============================================ */

/* Keywords: k, kd (keyword declaration), kn (keyword namespace), kp (keyword pseudo), kr (keyword reserved), kt (keyword type) */
.highlight .k,
.highlight .kd,
.highlight .kn,
.highlight .kp,
.highlight .kr,
.highlight .kt,
.highlight .kc { color: var(--code-keyword); }

/* Strings: s, s1 (single), s2 (double), sb (backtick), sc (char), sd (doc), se (escape), sh (heredoc), si (interpol), sx (other), sr (regex) */
.highlight .s,
.highlight .s1,
.highlight .s2,
.highlight .sb,
.highlight .sc,
.highlight .sd,
.highlight .se,
.highlight .sh,
.highlight .si,
.highlight .sx,
.highlight .sr,
.highlight .ss { color: var(--code-string); }

/* Comments: c, c1 (single), cm (multiline), cp (preprocessor), cs (special), cd (doc) */
.highlight .c,
.highlight .c1,
.highlight .cm,
.highlight .cp,
.highlight .cs,
.highlight .cd { color: var(--code-comment); font-style: italic; }

/* Functions: nf (function name), fm (function magic) */
.highlight .nf,
.highlight .fm { color: var(--code-function); }

/* Classes: nc (class name), nn (namespace), ni (entity) */
.highlight .nc,
.highlight .nn { color: var(--code-class); font-weight: bold; }

/* Numbers: m, mi (integer), mf (float), mh (hex), mo (octal), mb (binary), il (long) */
.highlight .m,
.highlight .mi,
.highlight .mf,
.highlight .mh,
.highlight .mo,
.highlight .mb,
.highlight .il { color: var(--code-number); }

/* Operators: o, ow (word) */
.highlight .o,
.highlight .ow { color: var(--code-operator); }

/* Variables: nv (variable), vi (instance var), vc (class var), vg (global var) */
.highlight .nv,
.highlight .vi,
.highlight .vc,
.highlight .vg { color: var(--code-variable); }

/* Constants: no (constant), nb (builtin name), bp (builtin pseudo) */
.highlight .no { color: var(--code-constant); }
.highlight .nb,
.highlight .bp { color: var(--code-builtin); }

/* Names: na (attribute), nt (tag), nd (decorator) */
.highlight .na { color: var(--code-variable); }
.highlight .nt { color: var(--code-keyword); }
.highlight .nd { color: var(--code-function); }

/* Special: p (punctuation), err (error) */
.highlight .p { color: var(--fg); }
.highlight .err {
  color: var(--code-keyword);
  background: transparent;
}

/* Generic styles: gh (heading), gu (subheading), gd (deleted), gi (inserted), gs (strong), ge (emphasis) */
.highlight .gh,
.highlight .gu { color: var(--code-class); font-weight: bold; }
.highlight .gd { color: var(--code-keyword); }
.highlight .gi { color: var(--code-string); }
.highlight .gs { font-weight: bold; }
.highlight .ge { font-style: italic; }

/* Syntax highlighting container */
.highlight {
  background: rgba(0, 0, 0, 0.3);
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.highlight pre {
  margin: 0;
  padding: 0;
  background: transparent;
}