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

:root {
  --bg: #FAFAF8;
  --surface: #F2F1ED;
  --ink: #1A1916;
  --ink-2: #5C5B57;
  --ink-3: #636260;
  --accent: #1A1916;
  --accent-light: #E8E6E0;
  --line: rgba(26,25,22,0.1);
  --serif: 'DM Serif Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
  --max: 860px;
}

html { scroll-behavior: smooth; }

.skip-link {
  position: absolute; top: -100%; left: 1rem;
  z-index: 9999; padding: 0.75rem 1.25rem;
  background: var(--ink); color: var(--bg);
  font-size: 0.85rem; font-weight: 500;
  text-decoration: none; border-radius: 0 0 4px 4px;
  transition: top 0.1s;
}
.skip-link:focus { top: 0; }

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 2.5rem;
  background: rgba(250,250,248,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-logo {
  font-family: var(--serif); font-size: 1.1rem;
  color: var(--ink); text-decoration: none; letter-spacing: 0.01em;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: 0.82rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-2);
  text-decoration: none; transition: color 0.2s;
  padding: 0.5rem 0.25rem; min-height: 44px;
  display: inline-flex; align-items: center;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }

/* LAYOUT */
section { padding: 7rem 2.5rem; }
.container { max-width: var(--max); margin: 0 auto; }

/* HERO */
#blog-hero {
  min-height: 38vh;
  display: flex; align-items: flex-end;
  padding-top: 9rem; padding-bottom: 4rem;
  border-bottom: 1px solid var(--line);
}
.hero-eyebrow {
  font-size: 0.78rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 1.25rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.hero-eyebrow::before {
  content: ''; display: inline-block;
  width: 28px; height: 1px; background: var(--ink-3);
}
.blog-title {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05; letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.blog-title em { font-style: italic; color: var(--ink-2); }
.blog-subtitle {
  color: var(--ink-2); font-size: 1rem;
  max-width: 480px; line-height: 1.75;
}

/* SECTION LABEL */
.section-label {
  font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 3rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.section-label::after {
  content: ''; flex: 1; height: 1px; background: var(--line);
}

/* POSTS */
#posts { padding-top: 5rem; padding-bottom: 7rem; }

.posts-list { display: flex; flex-direction: column; gap: 0; }

.post-item {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0;
}
.post-item:last-child { border-bottom: 1px solid var(--line); }

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  cursor: pointer;
  user-select: none;
}

.post-meta {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.post-tag {
  font-size: 0.68rem; padding: 0.2rem 0.55rem;
  background: var(--surface); border-radius: 2px;
  color: var(--ink-2); font-weight: 400;
  letter-spacing: 0.04em; text-transform: uppercase;
}

.post-title {
  font-family: var(--serif);
  font-size: 1.55rem; line-height: 1.15;
  letter-spacing: -0.01em; margin-bottom: 0.6rem;
}

.post-excerpt {
  font-size: 0.92rem; color: var(--ink-2);
  line-height: 1.75; max-width: 600px;
}

.post-toggle {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border: 1px solid var(--line); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-2); font-size: 1.1rem;
  transition: all 0.2s; margin-top: 0.25rem;
}
.post-item.open .post-toggle {
  background: var(--ink); color: var(--bg); border-color: var(--ink);
  transform: rotate(45deg);
}

.post-body {
  display: none;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  margin-top: 1.75rem;
}
.post-item.open .post-body { display: block; }

.post-content {
  font-size: 0.97rem;
  color: var(--ink-2);
  line-height: 1.85;
  max-width: 640px;
}
.post-content p { margin-bottom: 1.1rem; }
.post-content h2 {
  font-family: var(--serif);
  font-size: 1.3rem; color: var(--ink);
  margin: 1.75rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.post-content h3 {
  font-family: var(--sans); font-weight: 500;
  font-size: 0.92rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-3);
  margin: 1.5rem 0 0.6rem;
}
.post-content ul, .post-content ol {
  padding-left: 1.5rem; margin-bottom: 1.1rem;
}
.post-content li { margin-bottom: 0.35rem; }
.post-content code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.84em;
  background: var(--surface);
  padding: 0.15em 0.45em;
  border-radius: 2px;
  color: var(--ink);
}
.post-content pre {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.1rem;
}
.post-content pre code {
  background: none; padding: 0; font-size: 0.85em;
}
.post-content a {
  color: var(--ink); text-decoration: underline;
  text-underline-offset: 3px;
}
.post-content a:hover { color: var(--ink-2); }
.post-content strong { font-weight: 500; color: var(--ink); }
.post-content blockquote {
  border-left: 2px solid var(--line);
  padding-left: 1.25rem;
  margin: 1.25rem 0;
  color: var(--ink-3);
  font-style: italic;
}
.post-source {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}
.post-source a {
  color: var(--ink-3); text-decoration: none;
  letter-spacing: 0.04em; text-transform: uppercase;
  font-size: 0.72rem;
}
.post-source a:hover { color: var(--ink); }

/* EMPTY STATE */
.empty-state {
  padding: 5rem 0;
  text-align: center;
}
.empty-icon {
  font-size: 2.5rem; margin-bottom: 1.25rem;
  opacity: 0.3;
}
.empty-title {
  font-family: var(--serif);
  font-size: 1.5rem; margin-bottom: 0.75rem;
  color: var(--ink-2);
}
.empty-desc {
  font-size: 0.9rem; color: var(--ink-3);
  max-width: 380px; margin: 0 auto; line-height: 1.75;
}

/* LOADING */
.loading {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--ink-3); font-size: 0.88rem;
  padding: 3rem 0;
}
.loading-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--ink-3); animation: pulse 1.2s ease-in-out infinite;
}
.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes pulse {
  0%, 80%, 100% { opacity: 0.2; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

/* FOOTER */
footer {
  padding: 2.5rem;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.8rem; color: var(--ink-3);
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--ink-3); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }

/* HAMBURGER */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none; border: none;
  cursor: pointer; padding: 6px;
  -webkit-tap-highlight-color: transparent;
  position: relative; z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 1px;
  background: var(--ink);
  transition: transform 0.22s ease, opacity 0.15s ease;
  transform-origin: center;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* RESPONSIVE */
@media (max-width: 700px) {
  nav { padding: 1rem 1.5rem; backdrop-filter: none; background: var(--bg); }
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
    z-index: 50;
  }
  .nav-links.open { opacity: 1; visibility: visible; }
  .nav-links li { width: 100%; text-align: center; border-bottom: 1px solid var(--line); }
  .nav-links li:first-child { border-top: 1px solid var(--line); }
  .nav-links a { display: block; padding: 1.25rem 2rem; font-size: 0.85rem; letter-spacing: 0.1em; min-height: auto; }
  section { padding: 5rem 1.5rem; }
  #blog-hero { padding-top: 8rem; padding-bottom: 3rem; }
  footer { padding: 2rem 1.5rem; flex-direction: column; gap: 1rem; }
  .post-header { flex-direction: column; gap: 1rem; }
  .post-toggle { align-self: flex-start; }
}