/* Patina: cyan over amber, like oxidized copper.
   Cyan primary, amber hero, Outfit and IBM Plex. */

@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  --patina-ink: #16303a;
  --patina-muted: #4a6570;
  --patina-cyan: #0e7490;
  --patina-cyan-soft: #d5eef3;
  --patina-amber: #c2410c;
  --patina-paper: #f1f5f7;
  --patina-sidebar: #e4ecef;
  --patina-sidebar-end: #d8e3e8;
  --patina-border: #c5d4d8;
  --patina-surface: #ffffff;
  --patina-glow: rgba(14, 116, 144, 0.14);
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #eef4f6;
  --md-default-fg-color: #102830;
  --md-default-fg-color--light: #3a5560;
  --md-default-fg-color--lighter: #6a828c;
  --md-default-fg-color--lightest: #c5d4d8;
  --md-default-bg-color--light: #e4ecef;
  --md-primary-fg-color: #0b6f88;
  --md-primary-fg-color--light: #1494b0;
  --md-primary-fg-color--dark: #085568;
  --md-primary-bg-color: #f5fffd;
  --md-accent-fg-color: #0b6f88;
  --md-accent-fg-color--transparent: #0b6f8826;
  --md-typeset-a-color: #0b6f88;
  --md-code-bg-color: #dceaf0;
  --md-footer-bg-color: #102830;
  --md-footer-fg-color: #d5e2e6;
}

[data-md-color-scheme="slate"] {
  --patina-ink: #f3fbfc;
  --patina-muted: #b7cdd4;
  --patina-cyan: #22d3ee;
  --patina-cyan-soft: rgba(34, 211, 238, 0.22);
  --patina-amber: #fb923c;
  --patina-paper: #071014;
  --patina-sidebar: #0b171c;
  --patina-sidebar-end: #071014;
  --patina-border: #2f5560;
  --patina-surface: #122228;
  --patina-glow: rgba(34, 211, 238, 0.32);

  --md-default-bg-color: #071014;
  --md-default-fg-color: #eef8fa;
  --md-default-fg-color--light: #b7cdd4;
  --md-default-fg-color--lightest: rgba(34, 211, 238, 0.18);
  --md-default-bg-color--light: #0b171c;
  --md-primary-fg-color: #22d3ee;
  --md-primary-fg-color--light: #67e8f9;
  --md-primary-fg-color--dark: #0891b2;
  --md-primary-bg-color: #042f2e;
  --md-accent-fg-color: #22d3ee;
  --md-accent-fg-color--transparent: #22d3ee33;
  --md-typeset-a-color: #22d3ee;
  --md-code-bg-color: #051015;
  --md-footer-bg-color: #040b0e;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(1100px 480px at 8% -12%, rgba(14, 116, 144, 0.22), transparent 55%),
    radial-gradient(800px 380px at 100% 0%, rgba(234, 88, 12, 0.16), transparent 50%),
    var(--md-default-bg-color);
}

[data-md-color-scheme="slate"] body {
  background:
    radial-gradient(1100px 520px at 8% -12%, rgba(34, 211, 238, 0.18), transparent 55%),
    radial-gradient(820px 400px at 100% 0%, rgba(234, 88, 12, 0.14), transparent 48%),
    var(--md-default-bg-color);
}

.md-typeset,
.md-nav,
.md-search,
.md-header {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

.md-header__title,
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  font-family: "Outfit", "IBM Plex Sans", sans-serif;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.md-typeset code,
.md-typeset pre,
.md-typeset kbd {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

[data-md-color-scheme="default"] .md-header {
  background: color-mix(in srgb, var(--patina-paper) 88%, white);
  color: var(--patina-ink);
  box-shadow: none;
  border-bottom: 1px solid var(--patina-border);
  backdrop-filter: blur(12px);
}

[data-md-color-scheme="default"] .md-header--shadow {
  box-shadow: 0 8px 24px rgba(22, 48, 58, 0.04);
}

[data-md-color-scheme="default"] .md-header__button,
[data-md-color-scheme="default"] .md-header__topic,
[data-md-color-scheme="default"] .md-search__input,
[data-md-color-scheme="default"] .md-search__icon {
  color: var(--patina-ink);
}

[data-md-color-scheme="default"] .md-search__form {
  background: var(--patina-surface);
  border: 1px solid var(--patina-border);
}

[data-md-color-scheme="slate"] .md-header {
  background: color-mix(in srgb, var(--patina-paper) 90%, black);
  color: var(--patina-ink);
  box-shadow: none;
  border-bottom: 1px solid var(--patina-border);
}

.md-sidebar--primary {
  top: 0 !important;
  height: 100% !important;
  border: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: linear-gradient(180deg, var(--patina-sidebar) 0%, var(--patina-sidebar-end) 100%) !important;
}

.md-sidebar--primary::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 1px;
  background: color-mix(in srgb, var(--patina-cyan) 35%, transparent);
  pointer-events: none;
}

.md-sidebar--primary .md-sidebar__inner,
.md-sidebar--primary .md-sidebar__scrollwrap,
.md-nav--primary {
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.md-sidebar--secondary,
.md-sidebar--secondary .md-sidebar__inner,
.md-sidebar--secondary .md-sidebar__scrollwrap,
.md-nav--secondary,
.md-nav--secondary .md-nav {
  background: transparent !important;
  border: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  opacity: 1;
  max-height: none;
}

.md-nav--secondary > .md-nav__list {
  margin-left: 0.15rem;
  padding-left: 0.85rem;
  border-left: 2px solid color-mix(in srgb, var(--patina-cyan) 45%, transparent);
}

.md-nav--secondary .md-nav__title {
  background: transparent;
  box-shadow: none;
  margin-left: 0;
  margin-right: 0;
  padding-left: 0.85rem;
}

.md-nav--primary .md-nav__title {
  font-family: "Outfit", sans-serif;
  background: transparent;
  box-shadow: none;
  border: 0;
}

.md-typeset a {
  text-underline-offset: 0.15em;
}

.md-typeset table:not([class]) {
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--patina-border);
  border-radius: 8px;
  background: var(--patina-surface);
}

.md-typeset table:not([class]) th {
  background: var(--patina-cyan-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.85rem;
}

.md-typeset .highlight,
.md-typeset pre {
  border-radius: 8px;
  border: 1px solid var(--patina-border);
}

.md-typeset .admonition,
.md-typeset details {
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(22, 48, 58, 0.04);
}

.patina-hero {
  position: relative;
  margin: 0 0 1.75rem;
  padding: 1.6rem 1.6rem 1.4rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--patina-border);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(213, 238, 243, 0.55)),
    linear-gradient(118deg, #0e7490 0%, #ea580c 100%);
  box-shadow: 0 16px 36px var(--patina-glow);
}

[data-md-color-scheme="slate"] .patina-hero {
  background:
    linear-gradient(135deg, rgba(7, 16, 20, 0.55), rgba(7, 16, 20, 0.28)),
    linear-gradient(118deg, #0e7490 0%, #ea580c 100%);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 18px 42px rgba(14, 116, 144, 0.35);
}

.patina-hero::after {
  content: "";
  position: absolute;
  right: -36px;
  top: -36px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--patina-glow), transparent 70%);
  pointer-events: none;
}

.patina-kicker {
  margin: 0 0 0.5rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--patina-cyan);
}

.patina-hero h1 {
  margin: 0 0 0.55rem !important;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.15;
}

.patina-lede {
  margin: 0;
  max-width: 42rem;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--patina-muted);
}

.patina-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.15rem;
}

.patina-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none !important;
  border: 1px solid transparent;
}

.patina-btn--primary {
  background: var(--patina-cyan);
  color: #042f2e !important;
  box-shadow: 0 8px 18px var(--patina-glow);
}

[data-md-color-scheme="default"] .patina-btn--primary {
  color: #f5fffd !important;
}

.patina-btn--ghost {
  background: color-mix(in srgb, var(--patina-surface) 80%, transparent);
  color: var(--patina-ink) !important;
  border-color: var(--patina-border);
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}

.nav-card {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--patina-surface) 80%, transparent);
  border: 1px solid var(--patina-border);
  text-decoration: none !important;
  color: inherit !important;
}

.nav-card:hover {
  border-color: var(--patina-cyan);
  box-shadow: 0 10px 24px var(--patina-glow);
}

.nav-card strong {
  display: block;
  font-family: "Outfit", sans-serif;
  margin-bottom: 0.2rem;
}

.nav-card span {
  color: var(--patina-muted);
  font-size: 0.92rem;
}