/* ===== Jay Paek — personal site ===== */

:root {
  --bg: #ffffff;
  --sidebar-bg: #f6f6f6;
  --border: #dddddd;
  --text: #222222;
  --muted: #666666;
  --accent: #224b8d;
  --accent-light: #527bbd;
  --rule: #aaaaaa;
  --maxw: 820px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.5;
}

/* ===== Layout ===== */
.layout {
  display: flex;
  align-items: flex-start;
  min-height: 100vh;
}

.sidebar {
  flex: 0 0 200px;
  width: 200px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 1.4em 1em;
  position: sticky;
  top: 0;
  align-self: stretch;
  min-height: 100vh;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-name {
  font-size: 1.25em;
  font-weight: bold;
  color: var(--accent);
  text-decoration: none;
  line-height: 1.2;
}
.site-name:hover { text-decoration: none; border: none; }

.nav-burger {
  display: none;
  cursor: pointer;
  font-size: 1.3em;
  color: var(--accent-light);
  user-select: none;
}

.site-nav {
  margin-top: 1.2em;
  display: flex;
  flex-direction: column;
}

.site-nav a {
  display: block;
  padding: 0.3em 0;
  color: var(--accent-light);
  text-decoration: none;
  border: none;
}
.site-nav a:hover { color: var(--accent); border: none; }
.site-nav a.current {
  color: #022b6d;
  font-weight: bold;
  border-bottom: 1px solid var(--rule);
}

.content {
  flex: 1 1 auto;
  min-width: 0;
  padding: 2em 2.4em;
  max-width: var(--maxw);
  margin: 0 auto;
  width: 100%;
}

/* ===== Headings ===== */
.page-head {
  margin-bottom: 1.4em;
  padding-bottom: 0.3em;
  border-bottom: 3px double var(--rule);
}
.page-head h1 { margin: 0; border: none; padding: 0; }

h1, h2, h3, h4 {
  color: var(--accent-light);
  line-height: 1.2;
}
h1 { font-size: 1.9em; }
h2 {
  font-size: 1.35em;
  margin-top: 1.4em;
  padding-bottom: 0.2em;
  border-bottom: 1px solid var(--rule);
}
h3 { font-size: 1.12em; margin-top: 1.2em; }

/* ===== Text ===== */
p { margin: 0 0 0.85em; }
a { color: var(--accent); text-decoration: none; }
a:hover { border-bottom: 1px dotted gray; }

strong { font-weight: bold; }
em { font-style: italic; }

ul, ol { margin: 0.2em 0 0.9em; padding-left: 1.4em; }
ul { list-style-type: square; }
li { margin-bottom: 0.15em; }
li > ul, li > ol { margin: 0.1em 0 0.3em; }

code, tt {
  font-family: Menlo, Monaco, monospace;
  font-size: 0.88em;
  background: #ffffdd;
  padding: 0 2px;
}
pre {
  background: #f6f6f6;
  border: 1px solid silver;
  padding: 0.6em 0.8em;
  overflow-x: auto;
  font-size: 0.9em;
}
pre code { background: none; padding: 0; }

blockquote {
  margin: 1.2em 0;
  padding: 0.4em 1em;
  border-left: 3px solid var(--accent-light);
  background: #fafafa;
  color: #333;
  font-style: italic;
}

hr { border: none; border-top: 1px solid var(--border); margin: 1.6em 0; }

/* ===== Profile (home) ===== */
.profile {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4em;
  align-items: flex-start;
  margin-bottom: 1em;
}
.profile img {
  width: 320px;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
}
.profile .profile-info { flex: 1 1 240px; }

/* ===== Blog index ===== */
.post-list { list-style: none; padding: 0; }
.post-list li {
  display: flex;
  gap: 0.8em;
  padding: 0.35em 0;
  border-bottom: 1px dotted var(--border);
}
.post-list .post-date {
  flex: 0 0 auto;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ===== Posts ===== */
.post-meta { color: var(--muted); font-style: italic; margin-top: 0.3em; }
.post-back { margin-top: 2.5em; }

/* Floated figure (was jemdoc img_left) */
.imgfloat {
  float: left;
  margin: 0.3em 1.2em 0.8em 0;
  max-width: 50%;
}
.imgfloat img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
}
.imgfloat figcaption { font-size: 0.85em; color: var(--muted); margin-top: 0.3em; }
.clear { clear: both; }

/* Responsive video / youtube embed */
.video {
  position: relative;
  max-width: 480px;
  margin: 1.2em 0;
}
.video.shorts { max-width: 320px; }
.video::before { content: ""; display: block; padding-top: 56.25%; }
.video.shorts::before { padding-top: 177.78%; }
.video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ===== Tables ===== */
table {
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 0.9em;
}
th, td {
  border: 1px solid gray;
  padding: 3px 8px;
  text-align: center;
}
thead th, tr.heading th {
  border-bottom: 2px solid black;
  font-weight: bold;
}
.table-scroll { overflow-x: auto; }

/* ===== Footer ===== */
.site-footer {
  margin-top: 4em;
  padding-top: 0.6em;
  border-top: 1px solid #c0c0c0;
  font-size: 0.8em;
  color: #b0b0b0;
}

/* ===== Mobile ===== */
@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar {
    flex-basis: auto;
    width: 100%;
    min-height: 0;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 0.8em 1em;
  }
  .nav-burger { display: block; }
  .site-nav { display: none; }
  .nav-toggle:checked ~ .layout .site-nav { display: flex; }
  .content { padding: 1.4em 1.2em; }
  .imgfloat { float: none; max-width: 100%; margin: 0.8em 0; }
}