/* === TopOpt.jl Tutorials — Documenter-style overrides === */

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

:root {
  --purple-700: #2c5282;
  --purple-600: #396491;
  --purple-500: #4a7ab5;
  --purple-300: #8bb4d9;
  --purple-200: #b8d4eb;
  --purple-100: #e5f0f8;
  --purple-50: #f5f9fc;
  --blue-600: #4063d8;
  --green-600: #389826;
  --red-600: #cb3c33;
  --gray-900: #1a1a2e;
  --gray-700: #3d3d56;
  --gray-600: #555570;
  --gray-500: #6a737d;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --code-bg: #f6f8fa;
  --code-border: #e1e4e8;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --radius: 8px;
  --radius-lg: 12px;
  --doc-max-width: 85rem;
  --doc-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --doc-font-mono: 'JuliaMono', 'SFMono-Regular', 'Menlo', 'Consolas', monospace;
}

body {
  font-family: var(--doc-font-sans) !important;
  color: var(--gray-700) !important;
  background: var(--gray-50) !important;
  line-height: 1.65 !important;
  -webkit-font-smoothing: antialiased !important;
}

/* ── Navbar ── */
.navbar, .navbar-dark, .navbar-light {
  background: var(--white) !important;
  border-bottom: 1px solid var(--gray-200) !important;
  box-shadow: var(--shadow-sm) !important;
  padding: 0.25rem 1rem !important;
}
.navbar .navbar-brand {
  color: var(--gray-900) !important;
  font-weight: 700 !important;
  font-size: 1.25rem !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.75rem !important;
  padding-top: 0.25rem !important;
  padding-bottom: 0.25rem !important;
}
.navbar .navbar-brand img {
  height: 34px !important;
  width: auto !important;
}
.navbar .nav-link {
  color: var(--gray-600) !important;
  font-weight: 500 !important;
  font-size: 1rem !important;
  padding: 0.4rem 0.75rem !important;
  border-radius: 6px !important;
  transition: all 0.15s ease !important;
}
.navbar .nav-link:hover,
.navbar .nav-link:focus {
  color: var(--purple-600) !important;
  background: var(--purple-50) !important;
}

/* ── Hide sidebar logo ── */
.sidebar-header { display: none !important; }

/* ── Sidebar ── */
.sidebar, #quarto-sidebar {
  background: var(--white) !important;
  border-right: 1px solid var(--gray-200) !important;
  font-size: 0.85rem !important;
}
.sidebar .sidebar-item-text {
  color: var(--gray-600) !important;
  padding: 0.3rem 0.75rem !important;
  border-radius: 6px !important;
  transition: all 0.15s ease !important;
}
.sidebar .sidebar-item-text:hover {
  background: var(--purple-50) !important;
  color: var(--purple-600) !important;
}
.sidebar .sidebar-item-container.active .sidebar-item-text,
.sidebar .sidebar-item > .active > .sidebar-item-text {
  color: var(--purple-600) !important;
  font-weight: 600 !important;
  background: var(--purple-100) !important;
}
.sidebar-item-text.sidebar-link.text-start[data-bs-toggle="collapse"] {
  font-weight: 600 !important;
  text-transform: uppercase !important;
  font-size: 0.7rem !important;
  letter-spacing: 0.05em !important;
  color: var(--gray-400) !important;
}

/* ── Page logo ── */
.page-logo {
  display: block;
  max-width: 150px;
  height: auto;
  margin: 1rem auto 1.5rem;
  background: transparent;
}

/* ── Hero section ── */
.hero-section {
  background: linear-gradient(135deg, var(--purple-700) 0%, var(--purple-500) 100%);
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  margin: 0 auto 2rem;
  text-align: center;
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 48rem;
}
.hero-logo {
  display: block;
  margin: 0 auto 0.75rem;
  max-width: 60px;
  height: auto;
  background: transparent;
  border-radius: var(--radius);
  padding: 0.25rem;
}

/* ── Title ── */
.quarto-title-block .title {
  font-size: 1.75rem !important;
  font-weight: 800 !important;
  color: var(--gray-900) !important;
  letter-spacing: -0.01em !important;
  line-height: 1.3 !important;
  margin-top: 0.5rem !important;
}

/* ── Page layout: wider content ── */
.quarto-container.page-layout-article {
  max-width: 100vw !important;
  width: 100% !important;
  margin: 0 !important;
  padding: 0 2rem !important;
}
.quarto-container.page-layout-article .content {
  max-width: 100% !important;
}
#quarto-document-content {
  max-width: 100% !important;
}

/* Landing page: symmetric layout, TOC on right, flexible width */
body:has(.tutorial-grid) .quarto-container.page-layout-article {
  display: grid !important;
  grid-template-columns: 2rem minmax(0, 1fr) 14rem 2rem !important;
  padding: 0 !important;
}
body:has(.tutorial-grid) .quarto-title-block {
  display: none !important;
}
body:has(.tutorial-grid) #quarto-margin-sidebar {
  grid-column: 3 / 4 !important;
  padding: 0 0.5rem 1rem 1rem !important;
}
body:has(.tutorial-grid) .content {
  grid-column: 2 / 3 !important;
  padding: 0.5rem 3rem 3rem !important;
}

/* Tutorial pages: less right white space, TOC stays on left */
body:not(:has(.tutorial-grid)) .quarto-container.page-columns {
  grid-template-columns: [screen-start] 1em [screen-start-inset page-start page-start-inset body-start-outset] 14rem [body-start] 1.5em [body-content-start] minmax(0, 1fr) [body-content-end] 1.5em [body-end body-end-outset page-end-inset] 10rem [page-end screen-end-inset] 1em [screen-end] !important;
  padding-right: 0 !important;
}
body:not(:has(.tutorial-grid)) .content {
  grid-column: body-content-start / body-content-end !important;
  padding-right: 8rem !important;
}
body:not(:has(.tutorial-grid)) #quarto-sidebar {
  grid-column: body-start-outset / body-start !important;
}
body:not(:has(.tutorial-grid)) #quarto-sidebar #toc-title {
  margin-top: 1.4rem !important;
}
body:not(:has(.tutorial-grid)) .content {
  grid-column: body-content-start / body-content-end !important;
  padding-right: 0 !important;
}
body:not(:has(.tutorial-grid)) .margin-sidebar {
  grid-column: body-end / screen-end !important;
  padding-top: 5rem !important;
  min-width: 24rem !important;
  max-width: 24rem !important;
}

/* ── Tutorial cards — clean 2-column list ── */
.tutorial-grid {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 1.25rem !important;
  margin-bottom: 1.5rem !important;
}
.tutorial-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--white) !important;
  border: 1px solid var(--gray-200) !important;
  border-left: 3px solid var(--purple-500) !important;
  border-radius: 0 var(--radius) var(--radius) 0 !important;
  padding: 1.25rem 1.5rem !important;
  margin: 0 !important;
  transition: box-shadow 0.2s ease, border-left-color 0.2s ease !important;
  box-shadow: var(--shadow-sm) !important;
}

.tutorial-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--white) !important;
  border: 1px solid var(--gray-200) !important;
  border-left: 3px solid var(--purple-500) !important;
  border-radius: 0 var(--radius) var(--radius) 0 !important;
  padding: 1.25rem 1.5rem !important;
  margin: 0 !important;
  transition: box-shadow 0.2s ease, border-left-color 0.2s ease !important;
  box-shadow: var(--shadow-sm) !important;
  height: 100% !important;
}
.tutorial-card:hover {
  border-left-color: var(--purple-700) !important;
  box-shadow: var(--shadow-md) !important;
}
.tutorial-card > p:first-child {
  margin: 0 0 0.5rem !important;
}
.tutorial-card a {
  font-weight: 700 !important;
  color: var(--gray-900) !important;
  font-size: 1rem !important;
  line-height: 1.4 !important;
  text-decoration: none !important;
  position: static;
  padding-left: 0;
}
.tutorial-card:hover a {
  color: var(--purple-600) !important;
}
/* Stretched link: the whole card is clickable */
.tutorial-card > p:first-child a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}
.tutorial-card > p:last-child {
  position: relative;
  z-index: 2;
  color: var(--gray-500) !important;
  font-size: 0.88rem !important;
  line-height: 1.55 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
}
.tutorial-card code {
  position: relative;
  z-index: 2;
}

/* Responsive: 2 columns on medium, single column on narrow screens */
@media (max-width: 1200px) {
  .tutorial-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}
@media (max-width: 768px) {
  .tutorial-grid {
    grid-template-columns: 1fr !important;
  }
  /* Landing page: stack TOC below content */
  body:has(.tutorial-grid) .quarto-container.page-layout-article {
    display: block !important;
    padding: 0 1rem !important;
  }
  body:has(.tutorial-grid) .content {
    padding: 0.5rem 1rem 2rem !important;
  }
  body:has(.tutorial-grid) #quarto-margin-sidebar {
    position: static !important;
    width: 100% !important;
    padding: 1rem 0 !important;
  }
  /* Tutorial pages: stack TOC above content */
  body:not(:has(.tutorial-grid)) .quarto-container.page-columns {
    display: block !important;
    padding: 0 1rem !important;
  }
  body:not(:has(.tutorial-grid)) .margin-sidebar {
    width: 100% !important;
    min-width: unset !important;
    padding: 1rem 0 !important;
  }
  body:not(:has(.tutorial-grid)) .content {
    padding-right: 1rem !important;
  }
  /* Banner: full width on mobile */
  .hero-section {
    margin-left: 0 !important;
    margin-right: 0 !important;
    max-width: none !important;
  }
  .page-logo {
    max-width: 100px !important;
  }
  /* Navbar: smaller brand on mobile */
  .navbar .navbar-brand {
    font-size: 1.05rem !important;
  }
  .navbar .nav-link {
    font-size: 0.95rem !important;
  }
  /* Equal-height cards on mobile */
  .tutorial-grid {
    grid-auto-rows: auto !important;
  }
}

/* ── Headings ── */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900) !important;
  font-weight: 700 !important;
}
h2 {
  font-size: 1.2rem !important;
  padding-bottom: 0.4rem !important;
  border-bottom: 1px solid var(--gray-200) !important;
  margin-top: 2.5rem !important;
}

/* ── Links ── */
a { color: var(--purple-600) !important; }
a:hover { color: var(--purple-700) !important; }

/* ── Code blocks ── */
pre {
  background: var(--code-bg) !important;
  color: var(--gray-900) !important;
  border: 1px solid var(--code-border) !important;
  border-radius: var(--radius) !important;
  box-shadow: var(--shadow-sm) !important;
  padding: 1rem 1.25rem !important;
  font-family: var(--doc-font-mono) !important;
  font-size: 0.83rem !important;
  line-height: 1.65 !important;
}
pre code {
  background: transparent !important;
  padding: 0 !important;
}
code:not(pre code) {
  background: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  padding: 0.1em 0.35em !important;
  border-radius: 4px !important;
  font-family: var(--doc-font-mono) !important;
  font-size: 0.85em !important;
  color: var(--purple-700) !important;
}

/* ── TOC (sidebar) — minimal, sticky ── */
#quarto-margin-sidebar nav[role="doc-toc"] {
  position: sticky !important;
  top: 5rem !important;
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0 !important;
  box-shadow: none !important;
  font-size: 0.82rem !important;
}
#toc-title {
  font-size: 0.7rem !important;
  font-weight: 600 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.06em !important;
  color: var(--gray-500) !important;
  margin: 0 0 0.5rem !important;
  padding-bottom: 0.4rem !important;
  border-bottom: 1px solid var(--gray-200) !important;
}
nav[role="doc-toc"] ul {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0 !important;
  border-left: 2px solid var(--gray-200) !important;
}
nav[role="doc-toc"] li {
  margin: 0 !important;
}
nav[role="doc-toc"] a {
  display: block !important;
  color: var(--gray-600) !important;
  font-size: 0.82rem !important;
  font-weight: 400 !important;
  line-height: 1.5 !important;
  padding: 0.25rem 0.75rem !important;
  border-radius: 0 !important;
  border-left: 2px solid transparent !important;
  margin-left: -2px !important;
  transition: color 0.15s ease, border-color 0.15s ease !important;
}
nav[role="doc-toc"] a:hover {
  color: var(--purple-600) !important;
  border-left-color: var(--purple-300) !important;
}
nav[role="doc-toc"] a.active,
nav[role="doc-toc"] a.active:hover {
  color: var(--purple-700) !important;
  font-weight: 600 !important;
  border-left-color: var(--purple-600) !important;
}

/* ── Footer ── */
.page-footer {
  background: var(--white) !important;
  border-top: 1px solid var(--gray-200) !important;
  padding: 1.5rem 0 !important;
  color: var(--gray-500) !important;
  text-align: center !important;
}

/* ── Hide Quarto ornaments ── */
.hero-banner, .hero-image, .feature-card, .gallery-card,
.carousel, .get-started, .about-quarto { display: none !important; }