/* ========================================================================
   Meridian Docs — Custom Theme
   Aesthetic: institutional precision meets developer tooling
   Inspiration: Bloomberg Terminal, Stripe Docs, dark IDE themes
   ======================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500;600&family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,400&display=swap');

/* --- CSS Variables — Dark Palette (default) --- */
[data-md-color-scheme="slate"] {
  /* Core palette — warm charcoal, not pure black */
  --md-default-bg-color: #0f1117;
  --md-default-fg-color: #c9d1d9;
  --md-default-fg-color--light: #8b949e;
  --md-default-fg-color--lighter: #484f58;
  --md-default-fg-color--lightest: #21262d;

  /* Primary — cold steel blue with amber accent */
  --md-primary-fg-color: #1a1f2e;
  --md-primary-bg-color: #c9d1d9;
  --md-accent-fg-color: #d4a843;
  --md-accent-fg-color--transparent: rgba(212, 168, 67, 0.12);

  /* Typography colors */
  --md-typeset-color: #c9d1d9;
  --md-typeset-a-color: #d4a843;

  /* Code blocks */
  --md-code-bg-color: #161b22;
  --md-code-fg-color: #e6edf3;
  --md-code-hl-color: rgba(212, 168, 67, 0.15);

  /* Sidebar */
  --md-sidebar-bg-color: #0d1015;

  /* Custom vars */
  --meridian-glow: rgba(212, 168, 67, 0.08);
  --meridian-border: rgba(201, 209, 217, 0.08);
  --meridian-surface: #161b22;
  --meridian-surface-raised: #1c2129;
  --meridian-header-gradient: linear-gradient(135deg, #0f1117 0%, #1a1f2e 50%, #0f1117 100%);
}

/* --- Light Palette --- */
[data-md-color-scheme="default"] {
  --md-default-bg-color: #fafbfc;
  --md-default-fg-color: #1a1f2e;
  --md-default-fg-color--light: #4a5568;
  /* Header: dark background, light text — same feel as dark mode */
  --md-primary-fg-color: #1a1f2e;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #a67c2e;
  --md-accent-fg-color--transparent: rgba(166, 124, 46, 0.08);
  --md-typeset-a-color: #a67c2e;
  --md-code-bg-color: #f0f2f5;
  --md-code-fg-color: #1a1f2e;
  --meridian-glow: rgba(166, 124, 46, 0.06);
  --meridian-border: rgba(26, 31, 46, 0.12);
  --meridian-surface: #ffffff;
  --meridian-surface-raised: #f5f6f8;
  --meridian-header-gradient: linear-gradient(135deg, #1a1f2e 0%, #2d3348 50%, #1a1f2e 100%);
}

/* === TYPOGRAPHY === */

/* Headings — Fraunces: a distinctive serif with optical sizing */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.md-typeset h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--md-default-fg-color) 0%, var(--md-accent-fg-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.md-typeset h2 {
  font-size: 1.6rem;
  margin-top: 2.4rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--meridian-border);
}

.md-typeset h3 {
  font-size: 1.2rem;
  color: var(--md-accent-fg-color);
}

/* Body — DM Sans: geometric, modern, excellent readability */
.md-typeset {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.82rem;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

/* Code — JetBrains Mono: the developer's choice */
.md-typeset code,
.md-typeset pre code,
.md-typeset kbd {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.78rem;
  font-feature-settings: "liga" 1;
}

/* Inline code styling */
.md-typeset code:not(pre code) {
  background: var(--meridian-surface);
  border: 1px solid var(--meridian-border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.82em;
}

/* === HEADER === */

.md-header {
  background: var(--meridian-header-gradient) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--meridian-border);
  box-shadow: none;
}

/* Force header text white in both modes — header is always dark */
.md-header,
.md-header .md-header__title,
.md-header .md-header__topic,
.md-header .md-header__button,
.md-header .md-search__input,
.md-header a {
  color: #ffffff !important;
}

.md-header .md-search__input {
  color: #c9d1d9 !important;
}

.md-header .md-search__input::placeholder {
  color: rgba(201, 209, 217, 0.5) !important;
}

.md-header__title {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

/* Search bar styling */
.md-search__input {
  background: var(--meridian-surface) !important;
  border: 1px solid var(--meridian-border) !important;
  border-radius: 6px !important;
  font-family: 'DM Sans', sans-serif !important;
}

/* === NAVIGATION === */

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

.md-nav__item--active > .md-nav__link {
  color: var(--md-accent-fg-color);
  font-weight: 600;
}

.md-nav__link {
  transition: color 0.15s ease, padding-left 0.15s ease;
}

.md-nav__link:hover {
  color: var(--md-accent-fg-color);
  padding-left: 4px;
}

/* Section labels */
.md-nav__item--section > .md-nav__link {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  margin-top: 1.2rem;
}

/* === CONTENT AREA === */

.md-content {
  max-width: 52rem;
}

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

.md-typeset a:hover {
  border-bottom-color: var(--md-accent-fg-color);
}

/* Tables — clean, financial data style */
.md-typeset table:not([class]) {
  border: 1px solid var(--meridian-border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.78rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.md-typeset table:not([class]) th {
  background: var(--meridian-surface);
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  border-bottom: 2px solid var(--md-accent-fg-color);
  padding: 0.8rem 1rem;
}

.md-typeset table:not([class]) td {
  border-bottom: 1px solid var(--meridian-border);
  padding: 0.7rem 1rem;
}

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

.md-typeset table:not([class]) tr:hover td {
  background: var(--meridian-glow);
}

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

.md-typeset pre {
  border-radius: 8px;
  border: 1px solid var(--meridian-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

/* Subtle top accent line on code blocks */
.md-typeset pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--md-accent-fg-color) 0%, transparent 100%);
  opacity: 0.6;
}

/* === ADMONITIONS === */

.md-typeset .admonition,
.md-typeset details {
  border-radius: 8px;
  border: 1px solid var(--meridian-border);
  background: var(--meridian-surface);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

/* === TABS (for code examples) === */

.md-typeset .tabbed-labels > label {
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.md-typeset .tabbed-labels > label--active,
.md-typeset .tabbed-labels > label:hover {
  color: var(--md-accent-fg-color);
}

/* === FOOTER === */

.md-footer {
  background: var(--meridian-surface);
  border-top: 1px solid var(--meridian-border);
}

/* === ANIMATIONS === */

/* Page load — content fades in with slight upward motion */
.md-content__inner {
  animation: meridian-fadeIn 0.4s ease-out;
}

@keyframes meridian-fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered reveal for content sections */
.md-content__inner > h2 {
  animation: meridian-fadeIn 0.4s ease-out;
  animation-fill-mode: both;
}

.md-content__inner > h2:nth-of-type(1) { animation-delay: 0.05s; }
.md-content__inner > h2:nth-of-type(2) { animation-delay: 0.1s; }
.md-content__inner > h2:nth-of-type(3) { animation-delay: 0.15s; }
.md-content__inner > h2:nth-of-type(4) { animation-delay: 0.2s; }

/* Code blocks — subtle slide in */
.md-typeset pre {
  animation: meridian-slideIn 0.35s ease-out;
  animation-fill-mode: both;
}

@keyframes meridian-slideIn {
  from {
    opacity: 0;
    transform: translateX(-4px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* === BACKGROUND — subtle geometric texture === */

.md-main {
  background-image:
    radial-gradient(circle at 20% 80%, var(--meridian-glow) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, var(--meridian-glow) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Subtle grid pattern on sidebar */
[data-md-color-scheme="slate"] .md-sidebar {
  background:
    linear-gradient(var(--md-sidebar-bg-color) 0%, var(--md-sidebar-bg-color) 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(201, 209, 217, 0.02) 39px,
      rgba(201, 209, 217, 0.02) 40px
    );
}

/* === CUSTOM COMPONENTS === */

/* Hero section styling for the home page */
.md-typeset h1:first-child {
  font-size: 2.8rem;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

/* Strong/bold text — slightly brighter */
.md-typeset strong {
  color: var(--md-default-fg-color);
  font-weight: 600;
}

/* Horizontal rules — accent colored */
.md-typeset hr {
  border-color: var(--meridian-border);
  margin: 2.4rem 0;
}

/* Blockquotes — left border accent */
.md-typeset blockquote {
  border-left: 3px solid var(--md-accent-fg-color);
  background: var(--meridian-glow);
  padding: 0.8rem 1.2rem;
  border-radius: 0 6px 6px 0;
  font-style: italic;
}

/* Lists — tighter, more professional */
.md-typeset ol,
.md-typeset ul {
  margin-bottom: 1rem;
}

.md-typeset li {
  margin-bottom: 0.3rem;
}

/* === SCROLLBAR (dark mode) === */

[data-md-color-scheme="slate"] ::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-track {
  background: transparent;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb {
  background: rgba(201, 209, 217, 0.15);
  border-radius: 3px;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(201, 209, 217, 0.3);
}

/* === TABLE OF CONTENTS === */

.md-nav--secondary .md-nav__link {
  font-size: 0.72rem;
}

.md-nav--secondary .md-nav__link--active {
  color: var(--md-accent-fg-color);
  font-weight: 600;
}

/* === RESPONSIVE === */

@media (max-width: 76.25em) {
  .md-typeset h1 {
    font-size: 2rem;
  }

  .md-typeset h1:first-child {
    font-size: 2.2rem;
  }
}