/* ============================================================
   Systems & Intelligence — Premium Academic Theme
   Dark observatory aesthetic with purple-blue gradient accents
   ============================================================ */

/* --- Import refined fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* --- Root Variables (Slate / Dark Mode) --- */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color: #0c0e14;
  --md-primary-fg-color--light: #161b22;
  --md-primary-fg-color--dark: #000000;
  --md-primary-bg-color: #ffffff;
  --md-primary-bg-color--light: #a0a4ac;
  --md-accent-fg-color: #9c7cff;
  --md-default-bg-color: #0c0e14;
  --md-default-fg-color: #dcdde0;
  --md-code-bg-color: #12151e;
  --md-typeset-a-color: #b49aff;
  --si-glow: rgba(156, 124, 255, 0.12);
  --si-gradient-start: #7c4dff;
  --si-gradient-end: #00b0ff;
  --si-surface: #12151e;
  --si-border: rgba(156, 124, 255, 0.15);
  --si-header-bg: rgba(12, 14, 20, 0.85);
  --si-header-text: #ffffff;
}

/* --- Root Variables (Light Mode) --- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #ffffff;
  --md-primary-fg-color--light: #f5f5f5;
  --md-primary-fg-color--dark: #e0e0e0;
  --md-primary-bg-color: #202124;
  --md-primary-bg-color--light: #5f6368;
  --md-accent-fg-color: #5e35b1;
  --md-default-bg-color: #f8f9fa;
  --md-default-fg-color: #202124;
  --md-typeset-a-color: #5e35b1;
  --si-glow: rgba(94, 53, 177, 0.08);
  --si-gradient-start: #5e35b1;
  --si-gradient-end: #1565c0;
  --si-surface: #ffffff;
  --si-border: rgba(94, 53, 177, 0.15);
  --si-header-bg: rgba(255, 255, 255, 0.9);
  --si-header-text: #202124;
}

/* --- Typography --- */
:root {
  --md-text-font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --md-code-font: "JetBrains Mono", "Fira Code", monospace;
}

.md-typeset {
  font-size: 1.02rem;
  line-height: 1.85;
  letter-spacing: 0.005em;
}

/* --- Headings with Outfit display font --- */
.md-typeset h1 {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 700;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--si-gradient-start), var(--si-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-bottom: none;
  padding-bottom: 0.2em;
  margin-bottom: 1em;
}

.md-typeset h2 {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 600;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  margin-top: 2.5em;
  color: var(--md-default-fg-color);
}

.md-typeset h3 {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 500;
  font-size: 1.2rem;
  opacity: 0.92;
}

/* --- Hero Banner (Landing page) --- */
.md-typeset .hero-banner {
  text-align: center;
  padding: 4rem 2rem 3.5rem;
  margin-bottom: 2.5rem;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(124, 77, 255, 0.15), transparent 55%),
    radial-gradient(ellipse at 70% 80%, rgba(0, 176, 255, 0.08), transparent 55%),
    var(--si-surface);
  border-radius: 16px;
  border: 1px solid var(--si-border);
  position: relative;
  overflow: hidden;
}

.md-typeset .hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%237c4dff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.md-typeset .hero-banner h2 {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 800;
  font-size: 2.4rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--si-gradient-start), var(--si-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 0;
  margin-bottom: 0.3em;
}

.md-typeset .hero-banner em {
  font-size: 1.15rem;
  font-weight: 300;
  opacity: 0.8;
  display: block;
  margin-bottom: 0.5em;
}

.md-typeset .hero-banner strong {
  font-weight: 400;
  opacity: 0.6;
  font-size: 0.95rem;
}

/* --- Cards for navigation sections --- */
.md-typeset .grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}

.md-typeset .card {
  background: var(--si-surface);
  border: 1px solid var(--si-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.md-typeset .card:hover {
  border-color: var(--md-accent-fg-color);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 77, 255, 0.08);
}

.md-typeset .card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--si-gradient-start), var(--si-gradient-end));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.md-typeset .card:hover::after {
  opacity: 1;
}

.md-typeset .card h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.md-typeset .card p {
  font-size: 0.9rem;
  opacity: 0.75;
  line-height: 1.6;
}

/* --- Code Blocks --- */
.md-typeset code {
  border-radius: 5px;
  padding: 0.2em 0.45em;
  font-size: 0.87em;
  background: var(--md-code-bg-color);
}

.md-typeset pre {
  border-radius: 10px;
  border: 1px solid var(--si-border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.md-typeset pre>code {
  font-size: 0.87rem;
}

/* --- Admonitions --- */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 10px;
  border-left-width: 4px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
  background: var(--si-surface);
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 600;
}

/* --- Math blocks --- */
.md-typeset .MathJax {
  font-size: 1.08em;
}

/* --- Navigation tabs (top bar) --- */
.md-tabs {
  background: transparent;
  /* Use header background instead */
  color: var(--md-primary-bg-color);
}

.md-tabs__link {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  opacity: 0.7;
  color: var(--md-primary-bg-color);
  transition: opacity 0.2s ease, color 0.2s ease;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  opacity: 1;
  color: var(--md-accent-fg-color);
}

/* --- Sidebar navigation --- */
.md-nav__link {
  font-size: 0.88rem;
  letter-spacing: 0.005em;
  border-radius: 4px;
  padding: 0.3em 0.6em;
  transition: all 0.15s ease;
}

.md-nav__link:hover {
  background: var(--si-glow);
}

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

/* --- Header (frosted glass) --- */
.md-header {
  background: var(--si-header-bg);
  color: var(--si-header-text);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--si-border);
}

.md-header[data-md-state="hidden"] {
  transform: translateY(-100%);
}

.md-header__button {
  color: var(--si-header-text);
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  fill: var(--si-header-text);
}

.md-header__title {
  color: var(--si-header-text);
  font-weight: 600;
}

[data-md-color-scheme="default"] .md-header {
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
}

/* --- Footer --- */
.md-footer {
  border-top: 1px solid var(--si-border);
}

.md-footer-meta {
  background: var(--md-default-bg-color);
}

/* --- Content width & reading experience --- */
.md-content__inner {
  max-width: 58rem;
}

/* Responsive embed for Interactive Dashboard pages */
.md-typeset iframe[src*="app.html"] {
  width: 100% !important;
  max-width: 1200px;
  display: block;
  margin: 2rem auto !important;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

/* Allow the surrounding container to stretch safely without breaking flex boundaries */
.md-grid {
  max-width: 90%;
}

.md-content__inner {
  max-width: 100%;
}


/* --- Buttons --- */
.md-typeset .md-button {
  border-radius: 8px;
  font-family: "Outfit", var(--md-text-font);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.7em 1.6em;
  transition: all 0.25s ease;
}

.md-typeset .md-button--primary {
  background: linear-gradient(135deg, var(--si-gradient-start), var(--si-gradient-end));
  border: none;
  color: white;
  box-shadow: 0 4px 16px rgba(124, 77, 255, 0.25);
}

.md-typeset .md-button--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(124, 77, 255, 0.35);
}

.md-typeset .md-button:not(.md-button--primary) {
  border: 1px solid var(--si-border);
  background: var(--si-surface);
}

.md-typeset .md-button:not(.md-button--primary):hover {
  border-color: var(--md-accent-fg-color);
  background: var(--si-glow);
}

/* --- Smooth transitions --- */
.md-nav__link,
.md-tabs__link,
a {
  transition: color 0.2s ease, opacity 0.2s ease;
}

/* --- Blockquotes --- */
.md-typeset blockquote {
  border-left: 3px solid var(--md-accent-fg-color);
  background: var(--si-glow);
  border-radius: 0 8px 8px 0;
  padding: 1em 1.4em;
  margin: 1.5em 0;
  font-style: italic;
}

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

/* --- Tables --- */
.md-typeset table:not([class]) {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--si-border);
}

.md-typeset table:not([class]) th {
  background: linear-gradient(135deg, rgba(124, 77, 255, 0.1), rgba(0, 176, 255, 0.05));
  font-family: "Outfit", var(--md-text-font);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  padding: 0.9em 1em;
}

.md-typeset table:not([class]) td {
  padding: 0.8em 1em;
  border-bottom: 1px solid var(--si-border);
}

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

/* --- Horizontal Rules --- */
.md-typeset hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--si-gradient-start), var(--si-gradient-end), transparent);
  margin: 3em 0;
  opacity: 0.4;
}

/* --- Selection highlight --- */
::selection {
  background: rgba(124, 77, 255, 0.3);
}

/* --- Tooltip / annotations --- */
.md-annotation__index {
  background: var(--md-accent-fg-color) !important;
}

/* --- Stats bar on landing page --- */
.md-typeset .stats-bar {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--si-surface);
  border: 1px solid var(--si-border);
  border-radius: 12px;
}

.md-typeset .stat {
  text-align: center;
}

.md-typeset .stat-number {
  font-family: "Outfit", var(--md-text-font);
  font-weight: 700;
  font-size: 2rem;
  background: linear-gradient(135deg, var(--si-gradient-start), var(--si-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1.1;
}

.md-typeset .stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.6;
  font-weight: 500;
}

/* --- Smooth page load --- */
.md-content {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Print improvements --- */
@media print {
  .md-typeset h1 {
    -webkit-text-fill-color: #333;
    color: #333;
  }
}