/* Staff Engineer Portfolio - Minimal, content-first */

:root {
  --max-width: 700px;
  --font-size: 1rem;
  --line-height: 1.6;
  --color-bg: #f7f7f7;
  --color-text: #222;
  --color-muted: #666;
  --color-divider: #ddd;
  --color-link: #0066cc;
  --color-link-hover: #004499;
}

html.dark {
  --color-bg: #0f1115;
  --color-text: #e6e6e6;
  --color-muted: #999;
  --color-divider: #333;
  --color-link: #6eb3f7;
  --color-link-hover: #9cc9f7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
}

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-divider);
}

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.logo:hover {
  color: var(--color-link);
}

.nav-links {
  display: flex;
  align-items: center;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--color-muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--color-link);
}

.nav-links .separator {
  margin: 0 0.5rem;
  color: var(--color-divider);
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 0 0 0.25rem;
  font-size: 1rem;
  line-height: 1;
  color: var(--color-muted);
}

.theme-toggle:hover {
  color: var(--color-link);
}

.theme-icon-dark { display: inline; }
.theme-icon-light { display: none; }
html.dark .theme-icon-dark { display: none; }
html.dark .theme-icon-light { display: inline; }

/* Main content - centered column */
.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 0 3rem;
  border-bottom: 1px solid var(--color-divider);
}

.hero-title {
  font-size: 2rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin: 0 0 1rem;
}

.hero-tagline {
  font-size: 15px;
  color: var(--color-muted);
  margin: 0 0 0.5rem;
  line-height: var(--line-height);
}

/* Timeline */
.timeline {
  padding-top: 2rem;
}

.post-preview {
  margin-bottom: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-divider);
}

.timeline .post-preview:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: none;
}

.post-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.post-title a {
  color: var(--color-text);
  text-decoration: none;
}

.post-title a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

.post-meta {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 4px;
  margin-bottom: 1rem;
}

.post-meta .post-meta-tag {
  background: #f2f2f2;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

html.dark .post-meta .post-meta-tag {
  background: rgba(255, 255, 255, 0.1);
}

.post-description {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: var(--font-size);
}

/* Video embed - 16:9, responsive */
.embed-wrapper {
  aspect-ratio: 16 / 9;
  width: 100%;
  margin: 1rem 0;
  border-radius: 4px;
  overflow: hidden;
}

.embed-wrapper iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: none;
}

.post-image img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem 0;
  border-radius: 4px;
}

.read-more {
  font-size: 0.9rem;
  color: var(--color-link);
  text-decoration: none;
  display: inline-block;
  margin-top: 0.5rem;
}

.read-more:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* Full post page */
.post-full {
  padding-top: 0.5rem;
}

.post-full-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.post-full .post-meta {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-divider);
}

.post-body {
  margin-top: 1rem;
}

.post-body h2 {
  font-size: 1.35rem;
  font-weight: 600;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-link);
  display: inline-block;
}

.post-body h3 {
  font-size: 1.15rem;
  margin: 1.75rem 0 0.5rem;
  color: var(--color-text);
}

.post-body p {
  margin: 0 0 1.15rem;
}

.post-body li {
  margin-bottom: 0.5rem;
}

.post-body ul, .post-body ol {
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
}

.post-body p > strong:first-child {
  color: var(--color-link);
}

.post-body hr {
  border: none;
  height: 1px;
  background: var(--color-divider);
  margin: 2.5rem 0;
}

.post-body pre {
  background: #f6f8fa;
  padding: 1rem;
  overflow-x: auto;
  border-radius: 6px;
  font-size: 0.9rem;
  margin: 1.25rem 0;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

html.dark .post-body pre {
  background: #1a1d23;
  border-color: rgba(255, 255, 255, 0.06);
}

/* Dark mode: override highlight.js github theme for readability */
html.dark .post-body pre.hljs,
html.dark .post-body .hljs {
  background: #1a1d23 !important;
  color: #e6e6e6;
}

.post-body code {
  font-family: 'SF Mono', 'Fira Code', 'Monaco', monospace;
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-body :not(pre) > code {
  background: rgba(0, 0, 0, 0.06);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

html.dark .post-body :not(pre) > code {
  background: rgba(255, 255, 255, 0.08);
}

.post-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
  border-radius: 6px;
  max-height: 620px;
  object-fit: contain;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

html.dark .post-body img {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.post-body blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--color-link);
  background: rgba(0, 102, 204, 0.04);
  border-radius: 0 6px 6px 0;
  color: var(--color-muted);
}

html.dark .post-body blockquote {
  background: rgba(110, 179, 247, 0.06);
}

.post-body blockquote p:last-child {
  margin-bottom: 0;
}

.post-body a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.post-body a:hover {
  border-bottom-color: var(--color-link);
  text-decoration: none;
}

/* Error page */
.error-page {
  text-align: center;
  padding: 4rem 0;
}

.error-page h1 {
  font-size: 4rem;
  margin: 0 0 0.5rem;
  color: var(--color-muted);
}

.error-page p {
  margin: 0 0 1rem;
}

.error-page a {
  color: var(--color-link);
  text-decoration: none;
}

.error-page a:hover {
  text-decoration: underline;
}

/* Responsive: add horizontal padding on small screens so text doesn't stick to edges */
@media (max-width: 768px) {
  body {
    margin: 1rem;
  }
}