/* AstroPaper-style theme: light + dark, monospace type, one accent color */
:root,
[data-theme="light"] {
  --background: #fdfdfd;
  --foreground: #282728;
  --accent: #006cac;
  --muted: #e6e6e6;
  --border: #ece9e9;
}
[data-theme="dark"] {
  --background: #212737;
  --foreground: #eaedf3;
  --accent: #ff6b01;
  --muted: #343f60bf;
  --border: #ab4b08;
}

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

html { scroll-behavior: smooth; overflow-y: scroll; }

body {
  font-family: "Google Sans Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
body::selection, ::selection { background: color-mix(in srgb, var(--accent) 75%, transparent); color: #fff; }

main { flex: 1; width: 100%; }

a { color: inherit; text-decoration: none; }
svg {
  width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: 48rem; margin: 0 auto; padding: 0 1rem; }
hr { border: 0; border-top: 1px solid var(--border); margin: 0; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 50;
  background: var(--background); color: var(--accent);
  padding: .5rem 1rem; transition: top .2s;
}
.skip:focus { top: .5rem; }

/* ---------- Header ---------- */
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 4.5rem; position: relative; flex-wrap: wrap;
}
.logo {
  font-size: 1.25rem; font-weight: 600; line-height: 1.75rem;
  white-space: nowrap; padding: .25rem 0;
}
.logo:hover { color: var(--accent); }

nav { display: flex; align-items: center; }
#menu { list-style: none; display: flex; align-items: center; gap: 1rem; }
#menu > li > a:not(.icon-btn) {
  display: block; padding: .75rem .5rem; font-weight: 500;
  text-decoration: underline; text-decoration-style: dashed;
  text-decoration-color: transparent; text-underline-offset: 4px;
}
#menu > li > a.active { color: var(--accent); text-decoration-color: var(--accent); }
#menu > li > a:not(.icon-btn):hover { color: var(--accent); text-decoration-color: var(--accent); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .5rem; background: none; border: 0; cursor: pointer;
  color: var(--foreground);
}
.icon-btn:hover { color: var(--accent); }
.icon-btn:hover svg { transform: rotate(12deg); }
.icon-btn svg { transition: transform .2s; }

.menu-btn { display: none; }
.menu-btn .close { display: none; }
.menu-btn[aria-expanded="true"] .open { display: none; }
.menu-btn[aria-expanded="true"] .close { display: inline; }

/* theme icon: moon in light mode, sun in dark mode */
.sun { display: none; }
[data-theme="dark"] .sun { display: block; }
[data-theme="dark"] .moon { display: none; }

@media (max-width: 639px) {
  .menu-btn { display: inline-flex; }
  #menu {
    display: none; width: 100%;
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: .5rem 0 1rem; position: absolute; left: 1rem; right: 1rem; top: 3.25rem;
    background: var(--background); z-index: 10;
  }
  #menu.open { display: flex; }
  nav { position: absolute; right: 1rem; top: .5rem; }
  #menu { top: 100%; right: 0; left: auto; width: max-content; padding-right: 0; }
  .header-inner { height: 4.5rem; }
  #menu li { width: 100%; }
}

/* ---------- Hero ---------- */
.hero { padding: 3rem 0 2.5rem; }
.hero h1 { font-size: 2.25rem; line-height: 1.2; font-weight: 700; display: inline-block; margin: 2rem 0 0; }
.rss {
  display: inline-block; margin-left: .75rem; vertical-align: middle;
  padding: .25rem; color: var(--foreground); position: relative; top: 1.25rem;
}
.rss:hover { color: var(--accent); }
.rss svg { width: 1.5rem; height: 1.5rem; }
.hero p { margin: 1.25rem 0 0; max-width: 40rem; }
.hero p a {
  color: var(--accent); font-weight: 500;
  text-decoration: underline; text-decoration-style: dashed; text-underline-offset: 4px;
}
.hero p a:hover { text-decoration-style: solid; }
@media (min-width: 640px) { .hero h1 { font-size: 3rem; } }

.socials { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem; margin-top: 1rem; }
.socials span { margin-right: .5rem; font-weight: 500; }
.socials a { padding: .25rem; display: inline-flex; }
.socials a:hover { color: var(--accent); }
.socials a:hover svg { transform: rotate(12deg); }
.socials svg { transition: transform .2s; }
.hero .socials { margin-top: 2rem; }

/* ---------- Sections & post list ---------- */
section { padding: 3rem 0 2rem; }
h2 { font-size: 1.5rem; line-height: 2rem; font-weight: 600; letter-spacing: .025em; }

.posts { list-style: none; margin-top: 1.5rem; }
.posts li { margin: 0 0 2.25rem; }
.posts li:last-child { margin-bottom: 0; }
.posts li > a {
  display: inline-block; color: var(--accent);
  font-size: 1.125rem; font-weight: 500;
  text-decoration: underline; text-decoration-style: dashed;
  text-decoration-color: transparent; text-underline-offset: 4px;
}
.posts li > a:hover { text-decoration-color: var(--accent); }
.posts p { opacity: .85; margin-top: .25rem; }

.date { display: flex; align-items: center; gap: .5rem; margin: .25rem 0 .25rem; opacity: .8; font-size: .875rem; }
.date svg { width: 1.1rem; height: 1.1rem; flex: none; }
.date span { opacity: .8; }

.all-posts { text-align: center; margin: 3rem 0 .5rem; }
.btn {
  display: inline-block; padding: .5rem 1rem; font-weight: 500;
  background: var(--muted); border-radius: .25rem;
  text-decoration: underline; text-decoration-style: dashed;
  text-decoration-color: transparent; text-underline-offset: 4px;
}
.btn:hover { color: var(--accent); text-decoration-color: var(--accent); }


/* ---------- Footer ---------- */
footer { margin-top: 3rem; }
.footer-inner {
  display: flex; flex-direction: column; align-items: center; gap: .25rem;
  padding-top: 1rem; padding-bottom: 1.5rem;
}
.footer-inner .socials { margin-top: 0; }
.copy { font-size: .875rem; opacity: .85; text-align: center; }
@media (min-width: 640px) {
  .footer-inner { flex-direction: row; justify-content: space-between; padding-top: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ---------- About / prose pages ---------- */
.page { padding-top: 2rem; padding-bottom: 3rem; }

.breadcrumb { margin: 1.5rem 0 .5rem; font-size: 1rem; }
.breadcrumb ul { list-style: none; display: flex; flex-wrap: wrap; align-items: center; }
.breadcrumb li { display: flex; align-items: center; }
.breadcrumb a { opacity: .8; text-decoration: underline; text-underline-offset: 4px; }
.breadcrumb a:hover { color: var(--accent); opacity: 1; }
.breadcrumb span { margin: 0 .5rem; opacity: .8; }
.breadcrumb li[aria-current] { opacity: .8; }

.page-title { font-size: 1.5rem; line-height: 2rem; font-weight: 600; margin: 1rem 0 0; }
@media (min-width: 640px) { .page-title { font-size: 1.875rem; line-height: 2.25rem; } }

.prose { margin-top: 2rem; max-width: 100%; }
.prose > * + * { margin-top: 1.25rem; }
.prose a {
  color: var(--accent); font-weight: 500;
  text-decoration: underline; text-decoration-style: dashed; text-underline-offset: 4px;
  overflow-wrap: anywhere;
}

/* Code styles (inline and blocks) */
.prose code {
  background: color-mix(in srgb, var(--muted) 75%, transparent);
  color: var(--foreground);
  padding: .15rem .4rem;
  border-radius: .25rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Courier New', monospace;
  font-size: .94em;
}

.prose pre {
  background: var(--muted);
  border: 1px solid var(--border);
  padding: .75rem 1rem;
  border-radius: .5rem;
  overflow: auto;
  position: relative; /* for copy button */
}

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

/* Copy button for code blocks */
.prose pre .copy-btn {
  position: absolute;
  top: .25rem;
  right: .25rem;
  padding: .18rem;
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  border: 0;
  background: transparent;
  color: var(--foreground);
  border-radius: .35rem;
  cursor: pointer;
  transition: background .15s, color .15s, transform .06s;
}
.prose pre .copy-btn svg { width: .95rem; height: .95rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.prose pre .copy-btn:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
}
.prose pre .copy-btn.copied {
  background: var(--accent);
  color: #fff;
}
.prose a:hover { text-decoration-style: solid; }
.prose h2 { font-size: 1.5rem; line-height: 2rem; font-weight: 600; margin-top: 2.5rem; letter-spacing: normal; }
.prose img {
  display: block; width: 100%; height: auto; margin: 2rem auto;
  border: 2px solid var(--border);
}
.prose ul { list-style: disc; padding-left: 1.5rem; }
.prose li { margin-top: .25rem; padding-left: .25rem; }
.prose li::marker { color: var(--accent); }