@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Lora:ital,wght@0,400;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

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

/* ── Tokens ──────────────────────────────────────────────────────────────── */
:root {
  --bg:        #FAFAF8;
  --surface:   #F2F1EE;
  --border:    #E5E4E0;
  --text:      #1A1A1A;
  --muted:     #6B6B6B;
  --accent:    #1A56A4;
  --accent-hl: #EBF2FF;
  --tag-bg:    #EEEDF0;
  --max-w:     700px;
  --font-body: 'Lora', Georgia, serif;
  --font-ui:   'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ── Base ────────────────────────────────────────────────────────────────── */
html { font-size: 18px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; height: auto; display: block; }

/* ── Nav ─────────────────────────────────────────────────────────────────── */
nav {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav-brand:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--muted);
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ── Page wrapper ────────────────────────────────────────────────────────── */
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

/* ── Hero (index only) ───────────────────────────────────────────────────── */
.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.hero-label {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-ui);
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 600px;
}

/* ── Post list ───────────────────────────────────────────────────────────── */
.section-label {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.post-list { list-style: none; }

.post-list li {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}
.post-list li:first-child { border-top: 1px solid var(--border); }

.post-list .post-meta {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.post-list .post-tag {
  background: var(--tag-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}

.post-list h2 {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.post-list h2 a { color: var(--text); }
.post-list h2 a:hover { color: var(--accent); text-decoration: none; }

.post-list .post-excerpt {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ── Post page ───────────────────────────────────────────────────────────── */
.post-header {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.post-header .post-meta {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.post-tag {
  background: var(--tag-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
  font-family: var(--font-ui);
  font-size: 0.75rem;
}

.post-header h1 {
  font-family: var(--font-ui);
  font-size: 1.85rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 0.85rem;
}

.post-header .post-desc {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ── Post body ───────────────────────────────────────────────────────────── */
.post-body h2 {
  font-family: var(--font-ui);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.015em;
}

.post-body h3 {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 2rem 0 0.5rem;
}

.post-body p { margin-bottom: 1.25rem; }

.post-body ul, .post-body ol {
  margin: 0 0 1.25rem 1.25rem;
}
.post-body li { margin-bottom: 0.3rem; }

.post-body table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  margin: 1.5rem 0;
}
.post-body th {
  text-align: left;
  border-bottom: 2px solid var(--border);
  padding: 0.5rem 0.75rem;
  color: var(--muted);
  font-weight: 600;
}
.post-body td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.post-body tr:last-child td { border-bottom: none; }

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--surface);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--text);
}

.post-body pre {
  background: #1E1E2E;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.post-body pre code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
  color: #CDD6F4;
  line-height: 1.6;
}

.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--accent-hl);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--muted);
}

.post-body img {
  border-radius: 8px;
  margin: 2rem auto;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.post-body .img-caption {
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: -1.5rem;
  margin-bottom: 2rem;
}

/* ── About page ──────────────────────────────────────────────────────────── */
.about-header {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.about-header h1 {
  font-family: var(--font-ui);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.about-header .role {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--muted);
}

.about-body p { margin-bottom: 1.25rem; }

.about-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.about-links a {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  transition: border-color 0.15s, color 0.15s;
}
.about-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  html { font-size: 16px; }
  .hero h1 { font-size: 1.65rem; }
  .post-header h1 { font-size: 1.4rem; }
}

/* ── Workshop ────────────────────────────────────────────────────────────── */

.workshop-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 3rem;
  align-items: start;
}

/* Sidebar TOC */
.workshop-toc {
  position: sticky;
  top: 72px;
  padding: 2rem 0;
}

.workshop-toc-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.workshop-toc ul { list-style: none; margin: 0; padding: 0; }
.workshop-toc li { margin-bottom: 0.1rem; }

.workshop-toc a {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--muted);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: color 0.15s, background 0.15s;
}
.workshop-toc a:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}
.workshop-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-hl);
  font-weight: 500;
}

.toc-divider {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.toc-divider span {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-left: 0.6rem;
}

/* Main content area */
.workshop-main {
  padding: 2.5rem 0 5rem;
  min-width: 0;
}

.workshop-main h1 {
  font-family: var(--font-ui);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.workshop-main h2 {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.015em;
}

.workshop-main h3 {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 2rem 0 0.5rem;
}

.workshop-main p { margin-bottom: 1.25rem; }

.workshop-main ul, .workshop-main ol {
  margin: 0 0 1.25rem 1.25rem;
}
.workshop-main li { margin-bottom: 0.3rem; }

.workshop-main table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  margin: 1.5rem 0;
}
.workshop-main th {
  text-align: left;
  border-bottom: 2px solid var(--border);
  padding: 0.5rem 0.75rem;
  color: var(--muted);
  font-weight: 600;
}
.workshop-main td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.workshop-main tr:last-child td { border-bottom: none; }

.workshop-main code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  background: var(--surface);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--text);
}

.workshop-main pre:not(.ascii-diagram) {
  background: #1E1E2E;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.workshop-main pre:not(.ascii-diagram) code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
  color: #CDD6F4;
  line-height: 1.6;
}

.workshop-main blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--accent-hl);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--muted);
}

.workshop-main img {
  border-radius: 8px;
  margin: 2rem auto;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

/* Callout boxes */
.callout {
  border-left: 3px solid var(--border);
  background: var(--surface);
  border-radius: 0 6px 6px 0;
  padding: 0.85rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  line-height: 1.65;
}
.callout::before {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.callout p { margin-bottom: 0.5rem; }
.callout p:last-child { margin-bottom: 0; }

.callout-tip { border-left-color: var(--accent); background: var(--accent-hl); }
.callout-tip::before { content: 'Tip'; color: var(--accent); }

.callout-warn { border-left-color: #D97706; background: #FFFBEB; }
.callout-warn::before { content: 'Warning'; color: #D97706; }

.callout-do { border-left-color: #059669; background: #ECFDF5; }
.callout-do::before { content: 'Do'; color: #059669; }

.callout-dont { border-left-color: #DC2626; background: #FEF2F2; }
.callout-dont::before { content: "Don't"; color: #DC2626; }

/* Step indicators */
.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin: 1.5rem 0;
}
.step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 700;
  margin-top: 0.1rem;
}
.step-body { flex: 1; min-width: 0; }
.step-body strong { display: block; font-family: var(--font-ui); margin-bottom: 0.3rem; }
.step-body p { margin-bottom: 0.5rem; }

/* Keyboard key */
kbd {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.1em 0.45em;
  color: var(--text);
}

/* Prev/next nav */
.workshop-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
}
.workshop-nav a {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  transition: border-color 0.15s, color 0.15s;
}
.workshop-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* Mermaid diagrams */
.mermaid {
  margin: 2rem auto;
  overflow-x: auto;
  text-align: center;
}
.mermaid svg { max-width: 100%; height: auto; }

.diagram-caption {
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: -1rem;
  margin-bottom: 2rem;
}

/* ASCII diagrams */
.ascii-diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text);
  white-space: pre;
}

/* Workshop index cards */
.workshop-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.workshop-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  display: block;
  color: var(--text);
}
.workshop-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(26, 86, 164, 0.1);
  text-decoration: none;
}
.workshop-card-num {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.workshop-card h3 {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.35rem;
  text-transform: none;
  letter-spacing: 0;
}
.workshop-card p {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}

/* Workshop intro hero */
.workshop-hero {
  padding: 2rem 0 2.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.workshop-hero .page-label {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.workshop-hero h1 {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0.75rem;
}
.workshop-hero .hero-sub {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 560px;
}

/* ── Workshop responsive ──────────────────────────────────────── */
@media (max-width: 900px) {
  .workshop-shell {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .workshop-toc {
    position: static;
    padding: 1.25rem 0 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
  }
  .workshop-toc ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  .workshop-toc a {
    font-size: 0.78rem;
    padding: 0.25rem 0.5rem;
    border-left: none;
    border-bottom: 2px solid transparent;
  }
  .workshop-toc a.active {
    border-left: none;
    border-bottom-color: var(--accent);
  }
  .toc-divider {
    width: 100%;
    border-top: none;
    padding-top: 0;
    margin-top: 0.25rem;
  }
  .toc-divider span { display: none; }
  .workshop-main { padding: 1.5rem 0 3rem; }
}

@media (max-width: 600px) {
  .workshop-cards { grid-template-columns: 1fr; }
  .mermaid { font-size: 0.78rem; }
}