/* site.css — dark mode, homepage styles, overrides for lukstafi.github.io */

/* ===== Dark mode variables ===== */

:root {
  --bg: #fffff8;
  --fg: #111;
  --link: #0b57d0;
  --link-visited: #6a3aaf;
  --border: #ccc;
  --code-bg: #f5f5f0;
  --tag-bg: #e8e8e0;
  --tag-fg: #555;
  --nav-bg: rgba(255, 255, 248, 0.95);
}

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151515;
    --fg: #d4d4d4;
    --link: #8ab4f8;
    --link-visited: #c4a8f5;
    --border: #444;
    --code-bg: #1e1e1e;
    --tag-bg: #2a2a2a;
    --tag-fg: #bbb;
    --nav-bg: rgba(21, 21, 21, 0.95);
  }
}

/* Manual dark mode override */
:root[data-theme="dark"] {
  --bg: #151515;
  --fg: #d4d4d4;
  --link: #8ab4f8;
  --link-visited: #c4a8f5;
  --border: #444;
  --code-bg: #1e1e1e;
  --tag-bg: #2a2a2a;
  --tag-fg: #bbb;
  --nav-bg: rgba(21, 21, 21, 0.95);
}

/* Manual light mode override */
:root[data-theme="light"] {
  --bg: #fffff8;
  --fg: #111;
  --link: #0b57d0;
  --link-visited: #6a3aaf;
  --border: #ccc;
  --code-bg: #f5f5f0;
  --tag-bg: #e8e8e0;
  --tag-fg: #555;
  --nav-bg: rgba(255, 255, 248, 0.95);
}

/* Apply variables — override Tufte's hardcoded colors */
body {
  background-color: var(--bg) !important;
  color: var(--fg) !important;
}

a { color: var(--link); }
a:visited { color: var(--link-visited); }

hr { border-top-color: var(--border); }

.sidenote, .marginnote { color: var(--fg); }

pre, code { background-color: var(--code-bg); }
pre { padding: 0.5rem 0.8rem; border-radius: 4px; }

div.sourceCode { background-color: var(--code-bg); border-radius: 4px; }

blockquote { border-left: 4px solid var(--border); }

table { border-top-color: var(--fg); border-bottom-color: var(--fg); }
th { border-bottom-color: var(--border); }

/* Font smoothing for dark backgrounds */
:root[data-theme="dark"] body,
:root:not([data-theme="light"]) body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) body {
    -webkit-font-smoothing: auto;
    -moz-osx-font-smoothing: auto;
  }
}

/* ===== Navigation ===== */

.site-nav {
  font-family: et-book, Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 1.2rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  text-decoration: underline;
}

/* ===== Theme toggle ===== */

.theme-toggle {
  position: fixed;
  bottom: 1.2rem;
  right: 1.2rem;
  z-index: 100;
}

.theme-toggle button {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 2.4rem;
  height: 2.4rem;
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  transition: opacity 0.2s;
}

.theme-toggle button:hover {
  opacity: 0.7;
}

/* ===== TOC box (migrated from jca.css) ===== */

#TOC {
  margin: 1.25rem 0 2rem 0;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--code-bg);
  width: 55%;
}

#TOC ul { padding-left: 1.25rem; }

@media (max-width: 760px) {
  #TOC { width: 100%; }
}

/* ===== Homepage: tag filters ===== */

.tag-filters {
  margin: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-btn {
  font-family: et-book, Palatino, Georgia, serif;
  font-size: 1rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tag-btn:hover {
  background: var(--tag-bg);
}

.tag-btn.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ===== Homepage: post list ===== */

.post-list {
  list-style: none;
  padding: 0;
  width: 55%;
}

.post-item {
  margin-bottom: 1.4rem;
  line-height: 1.4;
}

.post-item time {
  font-family: et-book-roman-old-style, et-book, Georgia, serif;
  font-size: 1.1rem;
  color: var(--tag-fg);
  margin-right: 0.5rem;
}

.post-item .tag {
  display: inline-block;
  font-size: 0.85rem;
  padding: 0.1rem 0.5rem;
  border-radius: 1rem;
  background: var(--tag-bg);
  color: var(--tag-fg);
  margin-right: 0.4rem;
  vertical-align: middle;
}

.post-item a {
  font-size: 1.3rem;
}

.post-item .description {
  display: block;
  font-size: 1.1rem;
  color: var(--tag-fg);
  margin-top: 0.2rem;
}

@media (max-width: 760px) {
  .post-list { width: 100%; }
}