/* ============================================================
   Itan — Custom Stylesheet
   Material for MkDocs theme override
   ============================================================ */

/* ------------------------------------------------------------
   Google Fonts Import
   ------------------------------------------------------------ */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Fira+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&family=Montserrat:wght@500;600;700;800&display=swap');

/* ------------------------------------------------------------
   Colour Palette — Custom Properties
   ------------------------------------------------------------ */
:root {
  --itan-deep-space:    #002642;
  --itan-deep-slate:    #0A1628;
  --itan-amaranth:      #840032;
  --itan-golden:        #E59500;
  --itan-dust-grey:     #E5DADA;
  --itan-warm-white:    #F8F5F5;
}

/* ------------------------------------------------------------
   Typography — Body and Headings
   ------------------------------------------------------------ */
body,
.md-typeset {
  font-family: 'Fira Sans', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.75;
}

.md-typeset h1 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--itan-deep-space);
}

.md-typeset h2 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--itan-deep-space);
}

.md-typeset h3 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  color: var(--itan-deep-space);
}

.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 500;
}

/* ------------------------------------------------------------
   Monospace — Fira Code for code blocks and diagrams
   ------------------------------------------------------------ */
code,
pre,
.md-typeset code,
.md-typeset pre {
  font-family: 'Fira Code', monospace;
  font-size: 0.88rem;
}

/* ------------------------------------------------------------
   Light Mode — Colour Overrides
   ------------------------------------------------------------ */
[data-md-color-scheme="default"] {
  --md-primary-fg-color:        var(--itan-deep-space);
  --md-primary-fg-color--light: #1a4a6e;
  --md-primary-fg-color--dark:  var(--itan-deep-slate);
  --md-primary-bg-color:        var(--itan-warm-white);
  --md-accent-fg-color:         var(--itan-amaranth);

  /* Page background */
  --md-default-bg-color:        var(--itan-warm-white);

  /* Link colours */
  --md-typeset-a-color:         var(--itan-amaranth);
}

/* Light mode headings */
[data-md-color-scheme="default"] .md-typeset h1,
[data-md-color-scheme="default"] .md-typeset h2,
[data-md-color-scheme="default"] .md-typeset h3 {
  color: var(--itan-deep-space);
}

/* ------------------------------------------------------------
   Dark Mode — Colour Overrides
   ------------------------------------------------------------ */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color:        var(--itan-deep-slate);
  --md-primary-fg-color--light: var(--itan-deep-space);
  --md-primary-fg-color--dark:  #040d18;
  --md-primary-bg-color:        var(--itan-warm-white);
  --md-accent-fg-color:         var(--itan-golden);

  /* Page background */
  --md-default-bg-color:        #0f1e30;

  /* Link colours */
  --md-typeset-a-color:         var(--itan-golden);
}

/* Dark mode headings */
[data-md-color-scheme="slate"] .md-typeset h1,
[data-md-color-scheme="slate"] .md-typeset h2,
[data-md-color-scheme="slate"] .md-typeset h3 {
  color: var(--itan-dust-grey);
}

/* ------------------------------------------------------------
   Header and Navigation — Gradient Background
   ------------------------------------------------------------ */
.md-header {
  background: linear-gradient(
    135deg,
    var(--itan-deep-space) 0%,
    var(--itan-deep-slate) 100%
  );
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

/* Site title in header */
.md-header__title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* Navigation tabs bar */
.md-tabs {
  background: linear-gradient(
    135deg,
    var(--itan-deep-slate) 0%,
    #0d2035 100%
  );
  border-top: 1px solid rgba(229, 149, 0, 0.25);
}

/* Tab items */
.md-tabs__item {
  font-family: 'Fira Sans', sans-serif;
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

/* Active tab — golden underline */
.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--itan-golden) !important;
  opacity: 1;
}

.md-tabs__link--active::after {
  background-color: var(--itan-golden);
}

/* ------------------------------------------------------------
   Navigation Tabs — Prevent Overflow on Desktop
   ------------------------------------------------------------ */
.md-tabs__list {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;        /* Firefox */
  -ms-overflow-style: none;     /* IE/Edge */
}

.md-tabs__list::-webkit-scrollbar {
  display: none;                /* Chrome/Safari */
}

/* Tighten horizontal padding on each tab to gain space */
.md-tabs__item {
  padding: 0 0.6rem;
}

/* ------------------------------------------------------------
   Left Navigation Sidebar
   ------------------------------------------------------------ */
.md-nav__title {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  color: var(--itan-deep-space);
}

.md-nav__link--active,
.md-nav__link:hover {
  color: var(--itan-amaranth);
}

[data-md-color-scheme="slate"] .md-nav__title {
  color: var(--itan-dust-grey);
}

[data-md-color-scheme="slate"] .md-nav__link--active,
[data-md-color-scheme="slate"] .md-nav__link:hover {
  color: var(--itan-golden);
}

/* ------------------------------------------------------------
   Admonition Blocks — Custom Accent Colours
   ------------------------------------------------------------ */

/* tip — golden */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-color: var(--itan-golden);
}
.md-typeset .tip > .admonition-title,
.md-typeset .tip > summary {
  background-color: rgba(229, 149, 0, 0.12);
}
.md-typeset .tip > .admonition-title::before,
.md-typeset .tip > summary::before {
  background-color: var(--itan-golden);
}

/* note — deep space blue */
.md-typeset .admonition.note,
.md-typeset details.note {
  border-color: var(--itan-deep-space);
}
.md-typeset .note > .admonition-title,
.md-typeset .note > summary {
  background-color: rgba(0, 38, 66, 0.08);
}
.md-typeset .note > .admonition-title::before,
.md-typeset .note > summary::before {
  background-color: var(--itan-deep-space);
}

/* warning — amaranth */
.md-typeset .admonition.warning,
.md-typeset details.warning {
  border-color: var(--itan-amaranth);
}
.md-typeset .warning > .admonition-title,
.md-typeset .warning > summary {
  background-color: rgba(132, 0, 50, 0.08);
}
.md-typeset .warning > .admonition-title::before,
.md-typeset .warning > summary::before {
  background-color: var(--itan-amaranth);
}

/* ------------------------------------------------------------
   Blockquote — Pullout Style
   ------------------------------------------------------------ */
.md-typeset blockquote {
  border-left: 4px solid var(--itan-golden);
  background-color: rgba(229, 149, 0, 0.06);
  padding: 0.75rem 1.25rem;
  border-radius: 0 4px 4px 0;
  font-style: italic;
  color: inherit;
}

/* ------------------------------------------------------------
   Tables
   ------------------------------------------------------------ */
.md-typeset table:not([class]) {
  border: 1px solid var(--itan-dust-grey);
  border-radius: 4px;
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  background-color: var(--itan-deep-space);
  color: var(--itan-warm-white);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.md-typeset table:not([class]) tr:nth-child(even) {
  background-color: rgba(229, 218, 218, 0.25);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: var(--itan-deep-slate);
}

/* ------------------------------------------------------------
   Horizontal Rules — Subtle Accent
   ------------------------------------------------------------ */
.md-typeset hr {
  border-color: var(--itan-dust-grey);
  opacity: 0.6;
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.md-footer {
  background: linear-gradient(
    135deg,
    var(--itan-deep-slate) 0%,
    var(--itan-deep-space) 100%
  );
}

.md-footer-meta {
  background-color: rgba(0, 0, 0, 0.2);
}

/* ------------------------------------------------------------
   Content Width — Slightly Wider for Readability
   ------------------------------------------------------------ */
.md-grid {
  max-width: 1280px;
}

/* ------------------------------------------------------------
   Mobile Adjustments
   ------------------------------------------------------------ */
@media screen and (max-width: 76.1875em) {
  .md-nav--primary .md-nav__title {
    background: linear-gradient(
      135deg,
      var(--itan-deep-space) 0%,
      var(--itan-deep-slate) 100%
    );
    color: var(--itan-warm-white);
  }
}