/* =========================
   Base (system UI)
   ========================= */
:root {
  /* Background */
  --bg-page: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-transparent: transparent;

  /* Text */
  --text-primary: #1f2328;
  --text-secondary: #57606a;
  --text-subtle: #8b949e;
  
  /* Link */
  --accent-link: #0969da;

  /* Border */
  --border-default: #d0d7de;
  --border-soft: #c9d1d9;
  --border-muted: rgba(27, 31, 36, 0.15);

  /* Effects */
  --shadow-soft: rgba(0,0,0,0.08);
  --code-inline-bg: rgba(175, 184, 193, 0.2);
  --accent-ring: color-mix(in srgb, var(--accent-link) 25%, transparent);
}

html {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Ubuntu, Cantarell, "Noto Sans", Arial, sans-serif,
    "Apple Color Emoji","Segoe UI Emoji", "Segoe UI Symbol";
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  overflow-y: scroll; 
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

/* =========================
   Site header
   ========================= */
.site-header {
  border-bottom: 1px solid var(--border-default);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 16px;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
}

.site-nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500; 
  border-bottom: 2px solid var(--bg-transparent);
  padding-bottom: 2px; 
}

.site-name {
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.site-name:hover {
  color: var(--accent-link);
}

.site-nav a.active {
  color: var(--text-primary); 
  border-bottom: 2px solid var(--accent-link);
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--accent-link);
  text-decoration: none;
}

/* =========================
   Content typography rhythm
   ========================= */
.content {
  padding-top: 48px;
  padding-bottom: 64px;
}

.content section + section {
  margin-top: 3.5em;
}

.content h1,
.content h2,
.content h3,
.content h4 {
  margin: 1.2em 0 0.5em;
}

.content p {
  max-width: 42rem;
}

.content hr {
  border: 0;
  border-top: 1px solid var(--border-default);
  margin: 0.2em 0 0.9em;
}

.content hr + h4 {
  margin-top: 2em;
}

.content h1 + hr,
.content h2 + hr,
.content h3 + hr,
.content h4 + hr {
  margin-top: 0.25em;
}

h4 + p,
h4 + ul,
h4 + ol {
  margin-top: 0.3em;
  margin-bottom: 2em;
}

.content h2 + h3,
.content h3 + h3,
.content h3 + h4 {
  margin-top: 2em;
}

/* =========================
   Hero
   ========================= */
.hero .eyebrow {
  margin: 0 0 0.6rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.hero {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-default);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: 2rem;
  line-height: 1.25;
}

.hero-layout {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
}

.hero-text {
  flex: 1;
}

.hero-photo {
  margin-top: 4px;
  margin-bottom: 0.5rem;
}

.hero-photo img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  
  border: 1px solid var(--border-default);
  box-shadow: 0 2px 6px var(--shadow-soft);
}

.lead {
  max-width: 42rem;
  font-size: 1.08rem;
}

.hero-links {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.hero-meta {
  margin: 0.4rem 0 1rem;
  color: var(--text-subtle);
  font-size: 0.95rem;
}

.button {
  display: inline-block;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--text-primary);
  text-decoration: none;
}

.button:hover,
.button:focus {
  border-color: var(--accent-link);
  color: var(--accent-link);
  text-decoration: none;
}

/* ================================
   Responsive: medium/small screens
   ================================ */
@media (max-width: 700px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 14px 16px;
  }

  .site-nav nav {
    width: 100%;
  }

  .site-nav ul {
    gap: 1rem;
  }

  .site-name {
    line-height: 1.2;
  }

  .hero-layout {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

 .hero-photo {
    order: -1;
    margin-bottom: 1rem;
  }

  .hero-photo img {
    width: 120px;
    height: 120px;
  }

  .hero-links {
    justify-content: center;
  }
}

/* =========================
   Lists
   ========================= */
.content ul {
  padding-left: 1.25em;
  margin-left: 0;
}

.content li {
  max-width: 42rem;
  margin: 0.35em 0;
  line-height: 1.5;
}

/* =========================
   Links
   ========================= */
a {
  color: var(--accent-link);
  text-decoration: none;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration: underline;
}

/* =========================
   Profile icon
   ========================= */
.profile-icon {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
}

.profile-icon img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-muted);
  background: var(--bg-transparent);
  display: block;
}

@media (max-width: 600px) {
  .profile-icon img {
    width: 40px;
    height: 40px;
  }
}

/* =========================
   Code (inline + blocks)
   ========================= */
/* inline code */
.content :not(pre) > code {
  font-family: ui-monospace, SFMono-Regular, SFMono, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  padding: 0.2em 0.35em;
  border-radius: 6px;
  background: var(--code-inline-bg);
}

/* code blocks: works for plain <pre><code> AND Rouge wrappers */
.content pre,
.content .highlight {
  border-radius: 6px;
  overflow-x: auto;
}

.content pre {
  padding: 16px;
  margin: 16px 0;
  background: var(--bg-soft);
  border: 1px solid var(--border-muted);
}

.content pre code {
  background: var(--bg-transparent);
  padding: 0;
}

.content .highlight {
  margin: 16px 0;
  background: var(--bg-soft);
  border: 1px solid var(--border-muted);
}

.content .highlight pre {
  margin: 0;
  border: 0;
  background: var(--bg-transparent);
}

/* =========================
   Blockquotes
   ========================= */
blockquote {
  margin: 0.75em 0;
  padding: 0.3em 1em;
  background-color: var(--bg-transparent);
  border-left: 3px solid var(--border-soft);
  color: var(--text-subtle);
}

blockquote p {
  margin: 0;
}

/* =========================
   Footer
   ========================= */
.site-footer {
  margin-top: 2em;
  padding: 1em 20px 1em 0;
  text-align: right;
  color: var(--text-subtle);
  font-size: 0.9em;
}

.site-footer p {
  margin: 0.1em 0;
}