:root {
  --text: #222222;
  --heading: #ff0000;
  --box: #f3f3f3;
  --bg: #ffffff;
  --muted: #666666;
  --content-width: 760px;
  --image-width: 220px;
  --image-gap: 2rem;
  --image-right-pad: 1.5rem;
  --image-max-height: 220px;
  --side-safe: 4.5rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "Roboto Mono",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  line-height: 1.6;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

/* Fixed top buttons */
#theme-toggle,
#menu-toggle {
  position: fixed;
  top: 1rem;
  z-index: 1000;
  border: none;
  background: var(--box);
  color: var(--text);
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
}

#menu-toggle {
  left: 1rem;
  background: var(--heading);
  color: var(--bg);
  cursor: zoom-in;
}

#theme-toggle {
  right: 1rem;
  cursor: pointer;
}

/* Middle column */
#content,
main,
.container,
.wrapper {
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

#content {
  width: min(100%, var(--content-width));
  padding: 5.5rem var(--side-safe) 4rem;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6,
summary {
  color: var(--heading);
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
  margin: 1.8rem 0 0.8rem;
}

h2 {
  font-size: 1.5rem;
  margin: 1.8rem 0 0.8rem;
}

h3 {
  font-size: 0.8rem;
  margin-top: 1rem;
  margin-bottom: 0.2rem;
}

h4,
h5,
h6 {
  margin-top: 1rem;
  margin-bottom: 0.4rem;
}

p,
li,
blockquote,
td,
th {
  color: var(--text);
}

p,
ul,
ol,
pre,
blockquote {
  margin: 0 0 1rem;
}

h3 + p {
  margin-top: 0;
}

.h1-section > h1 {
  margin-bottom: 0.75rem;
}

/* Dropdown */
.h2-dropdown {
  background: var(--box);
  padding: 0.8rem 1rem;
  margin: 1rem 0;
}

.h2-dropdown summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

.h2-dropdown summary::-webkit-details-marker {
  display: none;
}

.h2-dropdown summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s ease;
}

.h2-dropdown[open] summary::before {
  transform: rotate(90deg);
}

.h2-body {
  display: flex;
  align-items: center;
  gap: var(--image-gap);
  margin-top: 0.75rem;
}

.h2-text {
  flex: 1 1 0;
  min-width: 0;
}

.h2-media {
  flex: 0 0 var(--image-width);
  width: var(--image-width);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-right: var(--image-right-pad);
}

.h2-media p {
  margin: 0;
  width: 100%;
}

.h2-media img,
.h2-media svg {
  max-height: var(--image-max-height);
  width: auto;
  height: auto;
  max-width: 100%;
}

/* Theme-colored inline SVG */
.h2-media svg.asana-svg {
  color: var(--heading);
}

.h2-media svg.asana-svg path:not([class]) {
  fill: currentColor;
}

/* Links */
a {
  color: var(--heading);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Code */
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.12rem 0.35rem;
  border-radius: 6px;
}

pre {
  background: var(--box);
  padding: 1rem;
  border-radius: 12px;
  overflow-x: auto;
}

pre code {
  background: transparent;
  padding: 0;
}

/* Lists */
ul,
ol {
  padding-left: 1.4rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th,
td {
  text-align: left;
  padding: 0.6rem 0.4rem;
}

/* Highlight */
mark {
  background: #ffeaa7;
  color: #222222;
  padding: 0.08rem 0.25rem;
  border-radius: 4px;
}

/* General images */
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

/* Muted */
small {
  color: var(--muted);
}

/* Dark mode */
body.dark {
  --text: #e8e8e8;
  --heading: #49a6ff;
  --box: #23262b;
  --bg: #111318;
  --muted: #a0a7b4;
}

body.dark #theme-toggle {
  background: var(--box);
  color: var(--text);
}

body.dark #menu-toggle {
  background: var(--heading);
  color: var(--bg);
}

body.dark code {
  background: rgba(255, 255, 255, 0.08);
}

body.dark mark {
  background: #2d4f7a;
  color: #ffffff;
}

/* Mobile */
@media (max-width: 700px) {
  :root {
    --image-max-height: 140px;
    --side-safe: 1rem;
  }

  #theme-toggle,
  #menu-toggle {
    top: 0.75rem;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
  }

  #menu-toggle {
    left: 0.75rem;
  }

  #theme-toggle {
    right: 0.75rem;
  }

  #content {
    padding: 5.5rem var(--side-safe) 4rem;
  }

  h1 {
    font-size: 1.7rem;
  }

  .h2-body {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 1rem;
  }

  .h2-media {
    width: 140px;
    flex-basis: auto;
    padding-right: 0;
  }
}