/* ═══════════════════════════════════════════════════════
   NEMETICS — Dark Modernist Stylesheet
   ═══════════════════════════════════════════════════════ */

:root {
  --bg-primary: #0d0d0f;
  --bg-secondary: #141418;
  --bg-tertiary: #1a1a20;
  --bg-card: #16161c;
  --bg-code: #1e1e26;

  --text-primary: #e0ddd5;
  --text-secondary: #9a9690;
  --text-muted: #666360;
  --text-accent: #c4a87a;
  --text-link: #8aadcf;
  --text-link-hover: #b3ceea;

  --accent-gold: #c4a87a;
  --accent-copper: #b87a5a;
  --accent-teal: #5a9a8a;
  --accent-violet: #8a7ab8;
  --accent-ember: #b85a5a;

  --border-color: #2a2a32;
  --border-subtle: #1f1f26;

  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --max-width: 780px;
  --max-width-wide: 1100px;
}

/* ── Reset & Base ───────────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Typography ─────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.3;
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4em;
  margin-top: 0;
}

h2 {
  font-size: 1.5rem;
  color: var(--accent-gold);
}

h3 {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

h4, h5, h6 {
  font-size: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

p {
  margin-bottom: 1.2em;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

strong {
  color: var(--text-primary);
  font-weight: 600;
}

em {
  color: var(--text-secondary);
  font-style: italic;
}

/* ── Blockquotes ────────────────────────────────────── */

blockquote {
  border-left: 3px solid var(--accent-gold);
  background: var(--bg-secondary);
  padding: 1em 1.4em;
  margin: 1.5em 0;
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
  font-style: italic;
}

blockquote p:last-child {
  margin-bottom: 0;
}

blockquote strong {
  color: var(--accent-gold);
}

/* ── Code ───────────────────────────────────────────── */

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-code);
  color: var(--accent-teal);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.2em 1.4em;
  overflow-x: auto;
  margin: 1.5em 0;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.85em;
}

/* ── Tables ─────────────────────────────────────────── */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.92em;
}

thead {
  border-bottom: 2px solid var(--accent-gold);
}

th {
  text-align: left;
  padding: 0.8em 1em;
  font-weight: 600;
  color: var(--accent-gold);
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

td {
  padding: 0.7em 1em;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

tr:hover td {
  background: var(--bg-secondary);
}

/* ── Lists ──────────────────────────────────────────── */

ul, ol {
  margin: 1em 0;
  padding-left: 1.8em;
}

li {
  margin-bottom: 0.4em;
  color: var(--text-secondary);
}

li strong {
  color: var(--text-primary);
}

/* ── Horizontal Rule ────────────────────────────────── */

hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.5em 0;
}

/* ── Layout ─────────────────────────────────────────── */

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0.8em 2em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-logo:hover {
  color: var(--text-primary);
}

.site-logo span {
  color: var(--text-muted);
  font-weight: 400;
}

.site-nav {
  display: flex;
  gap: 1.6em;
  align-items: center;
}

.site-nav a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.2s;
  padding: 0.3em 0;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-gold);
}

.main-content {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 3em 2em;
}

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

/* ── Page Header ────────────────────────────────────── */

.page-header {
  margin-bottom: 2.5em;
}

.page-header h1 {
  margin-bottom: 0.3em;
}

.page-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-family: var(--font-mono);
  display: flex;
  flex-wrap: wrap;
  gap: 1.2em;
  margin-top: 0.6em;
}

.page-meta .tag {
  background: var(--bg-tertiary);
  padding: 0.2em 0.6em;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
}

/* ── Post / Article ─────────────────────────────────── */

.article-content {
  margin-top: 1em;
}

.article-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1.5em 0;
}

/* ── Card Grid ──────────────────────────────────────── */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.2em;
  margin: 1.5em 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.4em 1.6em;
  transition: border-color 0.2s, transform 0.15s;
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.card h3 a {
  color: var(--text-primary);
  text-decoration: none;
}

.card h3 a:hover {
  color: var(--accent-gold);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex: 1;
}

.card .card-meta {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  margin-top: 0.8em;
}

/* ── Section Index ──────────────────────────────────── */

.section-intro {
  margin-bottom: 2em;
  padding-bottom: 1.5em;
  border-bottom: 1px solid var(--border-color);
}

.section-intro p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ── Blog List ──────────────────────────────────────── */

.post-list {
  list-style: none;
  padding: 0;
}

.post-list-item {
  padding: 1.4em 0;
  border-bottom: 1px solid var(--border-subtle);
}

.post-list-item:last-child {
  border-bottom: none;
}

.post-list-item h3 {
  margin-top: 0;
  margin-bottom: 0.3em;
  color: var(--text-primary);
}

.post-list-item h3 a {
  color: var(--text-primary);
}

.post-list-item h3 a:hover {
  color: var(--accent-gold);
}

.post-list-item .post-date {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

.post-list-item .post-excerpt {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-top: 0.4em;
}

/* ── Glossary ───────────────────────────────────────── */

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1em;
}

.glossary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.2em 1.4em;
  transition: border-color 0.2s;
}

.glossary-card:hover {
  border-color: var(--accent-teal);
}

.glossary-card h3 {
  margin-top: 0;
  margin-bottom: 0.3em;
  font-size: 1rem;
}

.glossary-card h3 a {
  color: var(--accent-teal);
}

.glossary-card .definition {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.glossary-card .category-tag {
  display: inline-block;
  margin-top: 0.6em;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.15em 0.5em;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Breadcrumbs ────────────────────────────────────── */

.breadcrumbs {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 1.5em;
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--accent-gold);
}

.breadcrumbs .sep {
  margin: 0 0.4em;
  color: var(--text-muted);
  opacity: 0.4;
}

/* ── Landing Page ───────────────────────────────────── */

.hero {
  text-align: center;
  padding: 4em 0 3em;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 3em;
}

.hero h1 {
  font-size: 3rem;
  border: none;
  padding: 0;
  margin-bottom: 0.3em;
  letter-spacing: -0.03em;
}

.hero .tagline {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.6;
}

.hero .glyph {
  font-size: 2rem;
  color: var(--accent-gold);
  margin-bottom: 0.5em;
  display: block;
}

.section-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1em;
  margin: 2em 0;
}

.section-nav-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.4em;
  text-align: center;
  transition: border-color 0.2s, transform 0.15s;
}

.section-nav-item:hover {
  border-color: var(--accent-gold);
  transform: translateY(-2px);
}

.section-nav-item .glyph {
  font-size: 1.8rem;
  display: block;
  margin-bottom: 0.4em;
}

.section-nav-item a {
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
  display: block;
}

.section-nav-item a:hover {
  color: var(--accent-gold);
}

.section-nav-item p {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 0.3em;
  margin-bottom: 0;
}

/* ── Footer ─────────────────────────────────────────── */

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2em;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 4em;
}

/* ── Responsive ─────────────────────────────────────── */

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .header-inner {
    padding: 0.6em 1em;
    flex-direction: column;
    gap: 0.5em;
  }

  .site-nav {
    gap: 1em;
    flex-wrap: wrap;
    justify-content: center;
  }

  .main-content {
    padding: 2em 1em;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .section-nav {
    grid-template-columns: 1fr 1fr;
  }

  h1 {
    font-size: 1.7rem;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 480px) {
  .section-nav {
    grid-template-columns: 1fr;
  }
}

/* ── Slideshow ──────────────────────────────────────────────── */

.slideshow {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin: 1.5em 0;
  overflow: hidden;
}

.slideshow-main {
  position: relative;
}

.slideshow-viewport {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-primary);
  overflow: hidden;
}

.slideshow-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.3s ease;
  cursor: pointer;
}

.slideshow-slide.active {
  opacity: 1;
}

.slideshow-prev,
.slideshow-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(13, 13, 15, 0.7);
  color: var(--text-secondary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.slideshow-prev:hover,
.slideshow-next:hover {
  color: var(--accent-gold);
  background: rgba(13, 13, 15, 0.9);
}

.slideshow-prev { left: 8px; }
.slideshow-next { right: 8px; }

.slideshow-caption {
  text-align: center;
  padding: 0.6em 1em;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-style: italic;
  min-height: 1.4em;
}

.slideshow-dots {
  display: flex;
  justify-content: center;
  gap: 0.5em;
  padding: 0.5em 0 0.8em;
}

.slideshow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--text-muted);
  opacity: 0.4;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s, background 0.2s;
}

.slideshow-dot:hover,
.slideshow-dot.active {
  background: var(--accent-gold);
  opacity: 1;
}

.slideshow-thumbs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 0.5em;
  border-top: 1px solid var(--border-color);
}

.slideshow-thumb {
  flex-shrink: 0;
  width: 64px;
  height: 42px;
  border: 2px solid transparent;
  border-radius: 4px;
  padding: 0;
  cursor: pointer;
  opacity: 0.5;
  overflow: hidden;
  background: none;
  transition: opacity 0.2s, border-color 0.2s;
}

.slideshow-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.slideshow-thumb:hover,
.slideshow-thumb.active {
  opacity: 1;
  border-color: var(--accent-gold);
}

/* Lightbox */

.slideshow-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
}

.slideshow-lightbox.active {
  display: flex;
}

.slideshow-lightbox img {
  max-width: 85vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
}

.slideshow-lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 2rem;
  cursor: pointer;
  z-index: 1001;
  line-height: 1;
  transition: color 0.2s;
}

.slideshow-lightbox-close:hover {
  color: var(--accent-gold);
}

.slideshow-lightbox-prev,
.slideshow-lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1001;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.slideshow-lightbox-prev { left: 16px; }
.slideshow-lightbox-next { right: 16px; }

.slideshow-lightbox-prev:hover,
.slideshow-lightbox-next:hover {
  color: var(--accent-gold);
  background: rgba(255, 255, 255, 0.2);
}

.slideshow-lightbox-caption {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-style: italic;
  text-align: center;
  max-width: 80vw;
}

.slideshow-lightbox-counter {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
}

/* Slideshow responsive */

@media (max-width: 768px) {
  .slideshow-prev,
  .slideshow-next {
    width: 32px;
    height: 32px;
    font-size: 1.2rem;
  }

  .slideshow-thumb {
    width: 48px;
    height: 32px;
  }
}

/* ── Audio Player ──────────────────────────────────────── */

.audio-player {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin: 1.5em 0;
  overflow: hidden;
}

.audio-track {
  display: flex;
  align-items: center;
  gap: 0.75em;
  padding: 0.9em 1em;
}

.audio-track + .audio-track {
  border-top: 1px solid var(--border-color);
}

.audio-play-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--accent-gold);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}

.audio-play-btn:hover {
  background: var(--accent-gold);
  color: var(--bg-primary);
}

.audio-icon-pause {
  font-size: 0.75rem;
  letter-spacing: 1px;
}

.audio-info {
  flex: 1;
  min-width: 0;
}

.audio-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.35em;
}

.audio-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.audio-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gold);
  border-radius: 3px;
  transition: width 0.1s linear;
}

.audio-progress-bar:hover .audio-progress-fill {
  background: var(--accent-copper);
}

.audio-time {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 0.25em;
}

.audio-volume {
  display: flex;
  align-items: center;
  gap: 0.4em;
  flex-shrink: 0;
}

.audio-volume-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  padding: 2px;
  transition: color 0.2s;
}

.audio-volume-btn:hover {
  color: var(--accent-gold);
}

.audio-volume-slider {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-tertiary);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.audio-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-gold);
  cursor: pointer;
}

.audio-volume-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-gold);
  border: none;
  cursor: pointer;
}

/* Audio player responsive */

@media (max-width: 768px) {
  .audio-track {
    flex-wrap: wrap;
  }

  .audio-volume {
    display: none;
  }

  .audio-play-btn {
    width: 36px;
    height: 36px;
  }
}

/* ═══════════════════════════════════════════════════════
   MathJax overrides
   ═══════════════════════════════════════════════════════ */

mjx-container[jax="CHTML"][display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  padding: 0.5em 0;
}