/* ==============================================
   HAL EA — Premium Knowledge Store
   Warm luxury: gold on deep black, editorial serif,
   refined spacing, subtle atmospheric depth.
   ============================================== */

/* === Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Plus+Jakarta+Sans:ital,wght@0,300..800;1,300..800&family=JetBrains+Mono:wght@400;500&display=swap');

/* === Color Tokens — Dark (primary) === */
[data-md-color-scheme="slate"] {
  --ea-gold: #c9a84c;
  --ea-gold-soft: #d4b76a;
  --ea-gold-dim: rgba(201, 168, 76, 0.18);
  --ea-gold-glow: rgba(201, 168, 76, 0.06);
  --ea-bg: #0f0f0e;
  --ea-surface: #171715;
  --ea-raised: #1e1e1b;
  --ea-text: #ddd9d0;
  --ea-text-bright: #f0ece4;
  --ea-muted: #8a857b;
  --ea-border: rgba(201, 168, 76, 0.10);
  --ea-border-strong: rgba(201, 168, 76, 0.22);
  --ea-shadow: rgba(0, 0, 0, 0.5);

  --md-default-fg-color: var(--ea-text);
  --md-default-bg-color: var(--ea-bg);
  --md-primary-fg-color: var(--ea-gold);
  --md-primary-bg-color: var(--ea-surface);
  --md-accent-fg-color: var(--ea-gold);
  --md-typeset-color: var(--ea-text);
  --md-typeset-a-color: var(--ea-gold);
  --md-code-bg-color: var(--ea-surface);
  --md-code-fg-color: var(--ea-text);
  --md-code-hl-color: var(--ea-gold-dim);
  --md-footer-bg-color: var(--ea-surface);
  --md-footer-fg-color: var(--ea-muted);
  --md-shadow-z1: 0 2px 8px var(--ea-shadow);
  --md-shadow-z2: 0 4px 16px var(--ea-shadow);
  --md-shadow-z3: 0 8px 32px var(--ea-shadow);
}

/* === Color Tokens — Light === */
[data-md-color-scheme="default"] {
  --ea-gold: #8c6d2e;
  --ea-gold-soft: #a68438;
  --ea-gold-dim: rgba(140, 109, 46, 0.12);
  --ea-gold-glow: rgba(140, 109, 46, 0.04);
  --ea-bg: #f8f5ef;
  --ea-surface: #eee9e0;
  --ea-raised: #e4dfd5;
  --ea-text: #2c2822;
  --ea-text-bright: #1a1714;
  --ea-muted: #847e74;
  --ea-border: rgba(140, 109, 46, 0.14);
  --ea-border-strong: rgba(140, 109, 46, 0.28);
  --ea-shadow: rgba(0, 0, 0, 0.08);

  --md-default-fg-color: var(--ea-text);
  --md-default-bg-color: var(--ea-bg);
  --md-primary-fg-color: var(--ea-gold);
  --md-primary-bg-color: var(--ea-surface);
  --md-accent-fg-color: var(--ea-gold);
  --md-typeset-color: var(--ea-text);
  --md-typeset-a-color: var(--ea-gold);
  --md-code-bg-color: var(--ea-surface);
  --md-code-fg-color: var(--ea-text);
  --md-code-hl-color: var(--ea-gold-dim);
  --md-footer-bg-color: var(--ea-surface);
  --md-footer-fg-color: var(--ea-muted);
}

/* === Base === */
html {
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--ea-gold-dim);
  color: var(--ea-text-bright);
}

/* Subtle grain texture for depth */
.md-main {
  position: relative;
}

/* === Typography === */
.md-typeset {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.82rem;
  line-height: 1.75;
  letter-spacing: 0.005em;
  color: var(--ea-text);
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-family: 'Instrument Serif', 'Georgia', serif;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--ea-text-bright);
}

.md-typeset h1 {
  font-size: 2.2em;
  line-height: 1.15;
  margin-bottom: 0.5em;
  padding-bottom: 0.45em;
  border-bottom: 1px solid var(--ea-border);
}

.md-typeset h2 {
  font-size: 1.55em;
  line-height: 1.25;
  margin-top: 2.2em;
  margin-bottom: 0.6em;
  color: var(--ea-gold);
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--ea-border);
}

.md-typeset h3 {
  font-size: 1.2em;
  line-height: 1.35;
  margin-top: 1.8em;
  color: var(--ea-gold-soft);
}

.md-typeset h4 {
  font-size: 1em;
  line-height: 1.4;
  margin-top: 1.5em;
  color: var(--ea-gold-soft);
  font-style: italic;
}

/* === Paragraphs === */
.md-typeset p {
  margin-top: 0;
  margin-bottom: 1em;
}

/* === Links === */
.md-typeset a {
  color: var(--ea-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.md-typeset a:hover {
  color: var(--ea-gold-soft);
  border-bottom-color: var(--ea-gold-dim);
}

/* === Strong & Emphasis === */
.md-typeset strong {
  color: var(--ea-text-bright);
  font-weight: 650;
}

.md-typeset em {
  color: var(--ea-muted);
  font-style: italic;
}

/* === Lists === */
.md-typeset ul,
.md-typeset ol {
  margin-bottom: 1em;
}

.md-typeset li {
  margin-bottom: 0.35em;
}

.md-typeset ul > li::marker {
  color: var(--ea-gold-dim);
}

.md-typeset ol > li::marker {
  color: var(--ea-gold);
  font-weight: 500;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

/* Nested lists */
.md-typeset li > ul,
.md-typeset li > ol {
  margin-top: 0.25em;
}

/* === Horizontal Rules === */
.md-typeset hr {
  border: none;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--ea-border-strong) 20%,
    var(--ea-border-strong) 80%,
    transparent
  );
  margin: 2.5em 0;
}

/* === Code === */
.md-typeset code {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 0.82em;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--ea-surface);
  color: var(--ea-gold-soft);
  border: 1px solid var(--ea-border);
}

.md-typeset pre {
  border-radius: 8px;
  border: 1px solid var(--ea-border);
  background: var(--ea-surface) !important;
}

.md-typeset pre code {
  border: none;
  padding: 0;
  background: transparent;
}

/* === Tables === */
.md-typeset table:not([class]) {
  border: 1px solid var(--ea-border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.9em;
}

.md-typeset table:not([class]) th {
  background: var(--ea-surface);
  color: var(--ea-gold);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.78em;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--ea-border-strong);
}

.md-typeset table:not([class]) td {
  border-bottom: 1px solid var(--ea-border);
}

.md-typeset table:not([class]) tr:last-child td {
  border-bottom: none;
}

/* === Blockquotes === */
.md-typeset blockquote {
  border-left: 3px solid var(--ea-gold);
  padding: 0.6em 1.2em;
  margin: 1.5em 0;
  background: var(--ea-gold-glow);
  border-radius: 0 6px 6px 0;
  color: var(--ea-muted);
  font-style: italic;
}

.md-typeset blockquote p {
  margin: 0;
}

/* === Details / Collapsible === */
.md-typeset details {
  border: 1px solid var(--ea-border);
  border-radius: 8px;
  background: var(--ea-surface);
  margin: 1.5em 0;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.md-typeset details:hover {
  border-color: var(--ea-border-strong);
}

.md-typeset details summary {
  padding: 0.7em 1em;
  cursor: pointer;
  font-weight: 500;
  color: var(--ea-muted);
  font-size: 0.88em;
  letter-spacing: 0.01em;
  user-select: none;
  transition: color 0.2s ease;
}

.md-typeset details summary:hover {
  color: var(--ea-gold);
}

.md-typeset details[open] summary {
  border-bottom: 1px solid var(--ea-border);
  color: var(--ea-gold);
}

.md-typeset details > *:not(summary) {
  padding-left: 1em;
  padding-right: 1em;
}

/* === Header === */
.md-header {
  background: var(--ea-surface) !important;
  border-bottom: 1px solid var(--ea-border);
  box-shadow: none !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

[data-md-color-scheme="slate"] .md-header {
  background: rgba(15, 15, 14, 0.85) !important;
}

[data-md-color-scheme="default"] .md-header {
  background: rgba(248, 245, 239, 0.85) !important;
}

.md-header__title {
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem !important;
  color: var(--ea-gold) !important;
}

.md-header__topic {
  font-weight: 600 !important;
  letter-spacing: 0.12em !important;
}

.md-header__topic + .md-header__topic {
  font-family: 'Instrument Serif', serif !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-weight: 400 !important;
  color: var(--ea-text) !important;
}

/* Instant loading progress bar */
.md-progress {
  background: var(--ea-gold) !important;
}

/* === Navigation Sidebar === */
.md-sidebar {
  scrollbar-width: thin;
  scrollbar-color: var(--ea-border) transparent;
}

.md-nav {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
}

.md-nav__item {
  padding: 0;
}

.md-nav__link {
  color: var(--ea-muted) !important;
  transition: color 0.15s ease;
  border-radius: 4px;
}

.md-nav__link:hover {
  color: var(--ea-text) !important;
}

.md-nav__link--active,
.md-nav__item .md-nav__link--active {
  color: var(--ea-gold) !important;
  font-weight: 600;
}

/* Section labels */
.md-nav__item--nested > .md-nav__link {
  color: var(--ea-text-bright) !important;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin-top: 0.8em;
}

/* === Search === */
.md-search__input {
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  background: var(--ea-surface) !important;
  border: 1px solid var(--ea-border) !important;
  border-radius: 8px !important;
  color: var(--ea-text) !important;
}

.md-search__input::placeholder {
  color: var(--ea-muted) !important;
}

.md-search__input:focus,
.md-search__input:hover {
  border-color: var(--ea-border-strong) !important;
}

.md-search-result {
  background: var(--ea-surface) !important;
}

.md-search-result__link:hover {
  background: var(--ea-raised) !important;
}

.md-search-result__meta {
  color: var(--ea-muted);
  font-size: 0.75rem;
}

/* === Content Area === */
.md-content {
  padding-top: 1.5rem;
}

.md-content__inner {
  margin-bottom: 3rem;
}

/* === Footer === */
.md-footer {
  background: var(--ea-surface) !important;
  border-top: 1px solid var(--ea-border);
}

.md-footer-meta {
  background: transparent !important;
}

.md-footer-nav__link {
  color: var(--ea-muted) !important;
  transition: color 0.2s ease;
}

.md-footer-nav__link:hover {
  color: var(--ea-gold) !important;
}

.md-footer-nav__direction {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ea-muted);
}

.md-footer-nav__title {
  font-family: 'Instrument Serif', serif;
}

/* === Back to Top === */
.md-top {
  background: var(--ea-surface) !important;
  border: 1px solid var(--ea-border) !important;
  color: var(--ea-gold) !important;
  box-shadow: var(--md-shadow-z2) !important;
  border-radius: 8px !important;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

/* === Custom Scrollbar (Webkit) === */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--ea-border-strong);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--ea-gold);
}

/* === Transitions === */
.md-nav__link,
.md-typeset a,
.md-search__input,
.md-header,
.md-footer-nav__link,
.md-top {
  transition-duration: 0.2s;
  transition-timing-function: ease;
}

/* === Theme Toggle === */
[data-md-component="palette"] button {
  border-radius: 50%;
  transition: transform 0.2s ease;
}

[data-md-component="palette"] button:hover {
  transform: scale(1.1);
}

/* === Admonitions (if used) === */
.md-typeset .admonition,
.md-typeset .admonition-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.md-typeset .admonition {
  border-radius: 8px;
  border: 1px solid var(--ea-border);
  box-shadow: none;
}

/* === Permalinks === */
.md-typeset .headerlink {
  color: var(--ea-border-strong) !important;
  transition: color 0.2s ease;
}

.md-typeset .headerlink:hover {
  color: var(--ea-gold) !important;
}

/* === Source file indicator (hide) === */
.md-source-file {
  display: none;
}

/* === Mobile Refinements === */
@media screen and (max-width: 76.25em) {
  .md-nav--primary .md-nav__title {
    background: var(--ea-surface) !important;
    color: var(--ea-gold) !important;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.72rem;
  }

  .md-nav--primary .md-nav__title .md-nav__icon {
    color: var(--ea-gold) !important;
  }
}

@media screen and (max-width: 600px) {
  .md-typeset {
    font-size: 0.84rem;
  }

  .md-typeset h1 {
    font-size: 1.8em;
  }

  .md-typeset h2 {
    font-size: 1.35em;
  }
}

/* === Print === */
@media print {
  .md-typeset h2 {
    color: #8c6d2e !important;
  }

  .md-typeset a {
    color: #8c6d2e !important;
  }
}