:root {
  --bg: #faf9f7;
  --fg: #1d1c1a;
  --muted: #6f6d67;
  --line: #e7e4de;
  --card: #ffffff;
  --accent: #2f6df0;
  --accent-ink: #2455c4;
  --tag-bg: #f0eeea;
}

:root[data-theme="dark"] {
  --bg: #131312;
  --fg: #e9e7e2;
  --muted: #93908a;
  --line: #2b2a27;
  --card: #1c1b1a;
  --accent: #7aa0f7;
  --accent-ink: #93b2f9;
  --tag-bg: #242320;
}

html { background: var(--bg); }
body { margin: 0; -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: #fff; }

/* Layout ------------------------------------------------------------ */
.page {
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  transition: background 0.2s ease, color 0.2s ease;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header ------------------------------------------------------------ */
.site-header {
  padding: 48px 0 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.theme-toggle {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
}
.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.nav-link {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  text-decoration: none;
  color: var(--muted);
  padding-bottom: 2px;
  border-bottom: 1.5px solid transparent;
}
.nav-link:hover { color: var(--fg); }
.nav-link.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

/* Main / screens ---------------------------------------------------- */
.main { padding: 40px 0 24px; }

.screen[hidden] { display: none; }

/* Shared typography ------------------------------------------------- */
.section-label {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin: 0;
}

.page-title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

.lead {
  margin: 0 0 32px;
  color: var(--muted);
}

.row-between {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.inline-link { color: var(--accent-ink); }

.code {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 14px;
  background: var(--tag-bg);
  padding: 1px 6px;
  border-radius: 4px;
}

/* Margin utilities -------------------------------------------------- */
.mb-0 { margin-bottom: 0; }
.mb-6 { margin-bottom: 6px; }
.mb-8 { margin-bottom: 8px; }
.mb-10 { margin-bottom: 10px; }
.mb-14 { margin-bottom: 14px; }

/* Home -------------------------------------------------------------- */
.eyebrow {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}

.hero-title {
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 20px;
}

.intro {
  margin: 0 0 16px;
  color: var(--fg);
}

.intro-muted {
  margin: 0 0 36px;
  color: var(--muted);
}

.focus-list {
  margin: 0 0 40px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.focus-item {
  display: flex;
  gap: 12px;
  align-items: baseline;
}
.focus-arrow {
  color: var(--accent);
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
}

.link-more {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--accent-ink);
  text-decoration: none;
}
.link-more:hover { text-decoration: underline; }

.writing-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 40px;
}
.writing-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--fg);
}
.writing-row:last-child { border-bottom: 1px solid var(--line); }
.writing-row:hover { color: var(--accent-ink); }
.writing-date {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--muted);
}

.social-row {
  display: flex;
  gap: 20px;
  align-items: center;
}
.link-accent {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--accent-ink);
  text-decoration: none;
}
.link-accent:hover { text-decoration: underline; }

/* Blog -------------------------------------------------------------- */
.link-mono-accent {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--accent-ink);
  text-decoration: none;
}
.link-mono-accent:hover { text-decoration: underline; }

.post-list {
  display: flex;
  flex-direction: column;
}
.post-list--gap { margin-bottom: 32px; }
.post-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.post-row:last-child { border-bottom: 1px solid var(--line); }
.post-date {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--muted);
  padding-top: 2px;
}
.post-title {
  margin: 0;
  font-weight: 500;
}
.post-desc {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
}

/* Projects ---------------------------------------------------------- */
.project-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.project-card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 10px;
  padding: 20px 22px;
}
.project-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.project-name {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 16px;
  font-weight: 500;
  margin: 0;
}
.link-source {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--accent-ink);
  text-decoration: none;
  white-space: nowrap;
}
.link-source:hover { text-decoration: underline; }
.project-desc {
  margin: 8px 0 14px;
  font-size: 15px;
  color: var(--muted);
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  background: var(--tag-bg);
  color: var(--muted);
  border-radius: 4px;
  padding: 3px 8px;
}

/* Notes ------------------------------------------------------------- */
.notes-list {
  display: flex;
  flex-direction: column;
}
.note {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.note:last-child { border-bottom: 1px solid var(--line); }
.note-meta {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 6px;
}
.note-body { margin: 0; }

/* Bookshelf --------------------------------------------------------- */
.book-list {
  display: flex;
  flex-direction: column;
}
.book {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.book:last-child { border-bottom: 1px solid var(--line); }
.book-title {
  margin: 0;
  font-weight: 500;
}
.book-author {
  font-weight: 400;
  color: var(--muted);
}
.book-desc {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
}
.badge {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 3px 10px;
  height: fit-content;
  white-space: nowrap;
}
.badge-reading {
  color: var(--accent-ink);
  border: 1px solid var(--accent-ink);
}
.badge-finished {
  color: var(--muted);
  border: 1px solid var(--line);
}

/* Now --------------------------------------------------------------- */
.now-meta {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 32px;
}
.now-body { margin: 0 0 28px; }

/* Uses -------------------------------------------------------------- */
.uses-list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.uses-list--last { margin: 0; }
.uses-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 12px;
}
.uses-key {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--muted);
}

/* Resume ------------------------------------------------------------ */
.resume-note {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
}
.resume-sub {
  margin: 0 0 36px;
  color: var(--muted);
}
.resume-job {
  margin: 0 0 24px;
  padding: 0 0 24px;
  border-bottom: 1px solid var(--line);
}
.resume-job-last { margin: 0 0 36px; }
.job-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.job-title {
  margin: 0;
  font-weight: 600;
}
.job-date {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}
.job-meta {
  margin: 2px 0 10px;
  font-size: 14px;
  color: var(--muted);
}
.job-points {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 15px;
}
.skill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 36px;
}
.skill {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  background: var(--tag-bg);
  color: var(--fg);
  border-radius: 4px;
  padding: 4px 10px;
}
.edu-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.edu-degree { margin: 0; }
.edu-date {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--muted);
}

/* Footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
}
.copyright {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.footer-link {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
}
.footer-link:hover { color: var(--fg); }
.footer-link-accent {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--accent-ink);
  text-decoration: none;
}
.footer-link-accent:hover { text-decoration: underline; }

/* Blog post (single) ------------------------------------------------- */
.post-meta {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 32px;
}
.post-content { font-size: 16px; }
.post-content p { margin: 0 0 20px; }
.post-content h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 32px 0 14px;
}
.post-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 12px;
}
.post-content ul,
.post-content ol { margin: 0 0 20px; padding-left: 20px; }
.post-content li { margin: 0 0 6px; }
.post-content a { color: var(--accent-ink); }
.post-content code {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 14px;
  background: var(--tag-bg);
  padding: 1px 6px;
  border-radius: 4px;
}
.post-content pre {
  background: var(--tag-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 20px;
}
.post-content pre code { background: none; padding: 0; }
.post-content blockquote {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 2px solid var(--line);
  color: var(--muted);
}
.back-link {
  display: inline-block;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--accent-ink);
  text-decoration: none;
  margin-bottom: 28px;
}
.back-link:hover { text-decoration: underline; }

/* Note body inline code ---------------------------------------------- */
.note-body code {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 14px;
  background: var(--tag-bg);
  padding: 1px 6px;
  border-radius: 4px;
}
.note-body p { margin: 0; }