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

/* Theme variables */
:root {
  --bg: #FAF6F1;
  --text: #3C2415;
  --heading: #2A1A0E;
  --link: #8B5E3C;
  --link-hover: #6B3F1F;
  --border: #D4B896;
  --code-bg: #F0E8DF;
  --code-text: #5C3D2E;
  --meta: #7A6455;
  --footer-bg: #F3EDE5;
}

[data-theme="dark"] {
  --bg: #1A1210;
  --text: #D4C4B0;
  --heading: #E8DDD0;
  --link: #C49A6C;
  --link-hover: #DEBD96;
  --border: #3D2E22;
  --code-bg: #241C16;
  --code-text: #C9A882;
  --meta: #9C8A78;
  --footer-bg: #1E1714;
}

/* Base */
html { font-size: 16px; }
body {
  font-family: 'Libre Baskerville', Georgia, serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

main {
  flex: 1;
  padding: 2rem 0;
}

/* Typography */
h1, h2, h3, h4 { color: var(--heading); line-height: 1.3; }
h1 { font-size: 1.8rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.4rem; margin: 1.8rem 0 0.6rem; }
h3 { font-size: 1.15rem; margin: 1.4rem 0 0.4rem; }
h4 { font-size: 1rem; margin: 1.2rem 0 0.3rem; }
p { margin-bottom: 1rem; }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

ul, ol { margin: 0 0 1rem 1.5rem; }
li { margin-bottom: 0.3rem; }
li > ul, li > ol { margin-bottom: 0; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

strong { color: var(--heading); }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-title {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--heading);
  text-decoration: none;
}
.site-title:hover { color: var(--link); text-decoration: none; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-nav a {
  font-size: 0.9rem;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--text);
}
.theme-toggle:hover {
  background: var(--code-bg);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--footer-bg);
  padding: 1.5rem 0;
  font-size: 0.85rem;
  color: var(--meta);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-links a { margin-left: 1rem; }

/* Home: Introduction */
.intro {
  text-align: center;
  padding: 1rem 0;
}
.intro h1 { font-size: 1.6rem; }

/* Home: Post list */
.post-list { list-style: none; margin-left: 0; }
.post-item { margin-bottom: 1.5rem; }
.post-item h2 { margin: 0 0 0.2rem; font-size: 1.2rem; }
.post-item .post-date {
  font-size: 0.85rem;
  color: var(--meta);
}
.post-item p {
  margin: 0.3rem 0 0;
  font-size: 0.95rem;
}

/* Post page */
.post-meta {
  color: var(--meta);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}
.post-content h2:first-child { margin-top: 0; }
.post-tags {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--meta);
}
.post-tags span {
  background: var(--code-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  margin-right: 0.4rem;
}
.post-discuss {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

/* About page */
.profile-pic {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin: 0 auto 1.5rem;
  border: 3px solid var(--border);
}

/* Code: inline */
code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 0.15em 0.35em;
  border-radius: 3px;
}

/* Code: blocks */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: 0.82em;
}

/* Professional pages (resume, about) */
.professional-font {
  font-family: 'Inter', system-ui, sans-serif;
}

/* Responsive */
@media (max-width: 600px) {
  html { font-size: 16px; }
  .site-header .container {
    flex-direction: column;
    gap: 0.5rem;
  }
  .site-nav { gap: 1rem; }
  .site-footer .container {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  .footer-links a { margin: 0 0.5rem; }
}