/* ========================================
   JetBrains Mono
   ======================================== */
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/webfonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 100%;
  descent-override: 25%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/webfonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 100%;
  descent-override: 25%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/webfonts/JetBrainsMono-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 100%;
  descent-override: 25%;
  line-gap-override: 0%;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/webfonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  size-adjust: 100%;
  ascent-override: 100%;
  descent-override: 25%;
  line-gap-override: 0%;
}

/* ========================================
   Site-Level Design Tokens (Layer 1)
   Built on Open Props custom properties.
   ======================================== */
:root {
  --site-font: "JetBrains Mono", ui-monospace, "Cascadia Code", "Source Code Pro",
    Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --site-bg: var(--pink-0);
  --site-text: var(--gray-9);
  --site-text-muted: var(--gray-7);
  --theme: var(--pink-7);
  --theme-hover: color-mix(in srgb, var(--theme) 80%, black);
  --site-surface: var(--pink-1);

  --text-1: var(--site-text);
  --text-2: var(--site-text-muted);

  --ratio-golden: 1.618;

  --site-max-width: var(--size-content-3);
  --site-gutter: clamp(var(--size-3), 4vw, var(--size-7));

  color-scheme: light;
}

[data-mode="dark"] {
  --site-bg: var(--gray-12);
  --site-text: var(--gray-3);
  --site-text-muted: var(--gray-6);
  --theme: var(--pink-3);
  --theme-hover: color-mix(in srgb, var(--theme) 80%, black);
  --site-surface: var(--pink-11);

  --text-1: var(--site-text);
  --text-2: var(--site-text-muted);

  color-scheme: dark;
}

/* ========================================
   Reset & Base
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--site-font);
  font-size: var(--font-size-1);
  line-height: var(--font-lineheight-3);
  color: var(--text-1);
  background-color: var(--site-bg);
  scrollbar-gutter: stable;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: var(--size-7) var(--site-gutter);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4 {
  line-height: var(--font-lineheight-1);
}

h1 {
  font-size: var(--font-size-fluid-3);
  font-weight: var(--font-weight-7);
}

h2 {
  font-size: var(--font-size-fluid-2);
  font-weight: var(--font-weight-7);
  margin-top: var(--size-7);
  margin-bottom: var(--size-2);
}

h3 {
  font-size: var(--font-size-fluid-1);
  font-weight: var(--font-weight-7);
  margin-top: var(--size-5);
  margin-bottom: var(--size-2);
}

p {
  margin-bottom: var(--size-3);
  max-width: var(--site-max-width);
}

a {
  color: var(--theme);
  text-decoration: none;
  transition: color 0.15s var(--ease-2);
}

a:hover {
  color: var(--theme-hover);
  text-decoration: underline;
}

ul, ol {
  padding-left: 1.5em;
  margin-bottom: var(--size-3);
}

li {
  margin-bottom: var(--size-1);
}

hr {
  border: none;
  border-top: var(--border-size-1) solid color-mix(in srgb, var(--theme) 30%, transparent);
  margin: var(--size-7) 0;
  transition: border-color 0.3s var(--ease-2);
}

code {
  font-family: var(--site-font);
  font-size: 0.9em;
  background: var(--site-surface);
  border: var(--border-size-1) solid color-mix(in srgb, var(--theme) 30%, transparent);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-1);
}

img {
  max-width: 100%;
  height: auto;
}

/* ========================================
   Utilities
   ======================================== */
.pixel-art {
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero-connectors {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 51;
  overflow: visible;
}

@keyframes quizConnectorFadeIn {
  0%   { opacity: 0; }
  100% { opacity: 0.5; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   Site Header
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--size-3) 0;
  background-color: var(--site-bg);
  border-radius: 0;
  box-shadow: none;
  transition:
    box-shadow 0.3s var(--ease-2),
    border-radius 0.3s var(--ease-2),
    padding 0.3s var(--ease-2);
}

.site-header.scrolled {
  box-shadow: var(--shadow-2);
  border-radius: var(--radius-2);
  padding: var(--size-3);
}

.site-header__title {
  font-size: clamp(var(--font-size-6), 10vw, var(--size-9));
  font-weight: var(--font-weight-7);
  letter-spacing: var(--font-letterspacing-0);
  line-height: var(--font-lineheight-0);
  color: var(--text-1);
  text-decoration: none;
  margin: 0;
  padding: 0 0.25em;
  border: var(--border-size-2) solid transparent;
  border-radius: var(--radius-2);
  transition: border-color 0.3s var(--ease-2);
}

.site-header__title:hover,
.site-header__title:active {
  color: var(--text-1);
  text-decoration: none;
}

.site-header__title:hover {
  border-color: var(--surface-2);
}

.site-header__title:active {
  border-color: var(--theme);
}

/* ========================================
   Dark Toggle
   ======================================== */
.dark-toggle {
  background: none;
  border: var(--border-size-1) solid var(--theme);
  border-radius: var(--radius-2);
  padding: 0;
  width: 2.25em;
  height: 2.25em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--theme);
  font-family: var(--site-font);
  font-size: var(--font-size-3);
  line-height: var(--font-lineheight-00);
  transition:
    border-color 0.15s var(--ease-2),
    color 0.15s var(--ease-2),
    background-color 0.15s var(--ease-2),
    transform 0.1s var(--ease-2);
}

@media (hover: hover) {
  .dark-toggle:hover {
    background: color-mix(in srgb, var(--theme) 10%, transparent);
  }
}

.dark-toggle__icon {
  display: flex;
}

.dark-toggle:active {
  transform: scale(0.93);
}

/* ========================================
   Site Footer
   ======================================== */
.site-footer {
  border-top: var(--border-size-1) solid color-mix(in srgb, var(--theme) 30%, transparent);
  padding: var(--size-5) var(--site-gutter);
  text-align: center;
  font-size: var(--font-size-fluid-0);
  transition: border-color 0.3s var(--ease-2);
  color: var(--text-1);
  max-width: var(--site-max-width);
  margin: 0 auto;
  width: 100%;
}