/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  color: #1a1a1a;
  background: #fafaf7;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: #0a5cff; text-decoration: none; transition: color .2s; }
a:hover { color: #0040c0; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: 'Fraunces', Georgia, serif; font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1.1rem; }

/* ---------- Layout ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 250, 247, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
  max-width: 1100px; margin: 0 auto; padding: 0 1.5rem;
}
.nav-brand { font-family: 'Fraunces', serif; font-weight: 600; font-size: 1.15rem; color: #1a1a1a; }
.nav-brand span { color: #0a5cff; }
.nav-links { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: #444; font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: #0a5cff; }
.nav-burger { display: none; background: none; border: 0; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 720px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: #fafaf7; flex-direction: column; padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(0,0,0,0.06); gap: 1rem; }
  .nav-links.open { display: flex; }
  .nav-burger { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 5rem 0 4rem;
  background:
    radial-gradient(circle at 10% 20%, rgba(10,92,255,0.08), transparent 40%),
    radial-gradient(circle at 90% 30%, rgba(255,119,40,0.06), transparent 45%);
}
.hero-inner { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; align-items: center; }
@media (max-width: 820px) { .hero-inner { grid-template-columns: 1fr; text-align: left; } }
.hero-tag {
  display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: #0a5cff;
  padding: 0.35rem 0.8rem; background: rgba(10,92,255,0.08);
  border-radius: 999px; margin-bottom: 1.25rem;
}
.hero h1 { margin: 0 0 1.25rem; }
.hero-lede { font-size: 1.2rem; color: #3b3b3b; max-width: 560px; margin-bottom: 2rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.avatar {
  width: 100%; max-width: 340px; aspect-ratio: 1/1;
  border-radius: 50%;
  background:
    linear-gradient(135deg, #0a5cff 0%, #7a3dff 50%, #ff7728 100%);
  display: grid; place-items: center;
  color: white;
  font-family: 'Fraunces', serif; font-size: 6rem; font-weight: 600;
  box-shadow: 0 30px 60px -20px rgba(10,92,255,0.3);
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 0.85rem 1.6rem;
  border-radius: 10px; font-weight: 600; font-size: 0.95rem;
  transition: all .2s ease;
  cursor: pointer; border: 0;
}
.btn-primary { background: #1a1a1a; color: #fff; }
.btn-primary:hover { background: #0a5cff; color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #1a1a1a; border: 1px solid rgba(0,0,0,0.15); }
.btn-ghost:hover { border-color: #1a1a1a; color: #1a1a1a; }

/* ---------- Credibility strip ---------- */
.creds {
  padding: 2.5rem 0; border-top: 1px solid rgba(0,0,0,0.06);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  text-align: center;
}
.creds-label { font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: #777; margin-bottom: 1rem; }
.creds-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 2.5rem; font-family: 'Fraunces', serif; font-size: 1.4rem; color: #1a1a1a; font-weight: 600; }
.creds-row span { opacity: 0.75; }

/* ---------- Sections ---------- */
.section { padding: 5rem 0; }
.section-head { text-align: center; margin-bottom: 3rem; }
.section-head p { color: #666; max-width: 600px; margin: 0.5rem auto 0; }

/* ---------- Feature Cards (home) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.card {
  background: #fff; padding: 1.8rem; border-radius: 16px;
  border: 1px solid rgba(0,0,0,0.05);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -10px rgba(0,0,0,0.08); }
.card-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: linear-gradient(135deg, #0a5cff, #7a3dff);
  color: #fff; display: grid; place-items: center;
  font-size: 1.2rem; margin-bottom: 1rem;
}
.card h3 { margin: 0 0 0.5rem; }
.card p { color: #555; margin: 0; }

/* ---------- Blog list ---------- */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-item {
  display: grid; grid-template-columns: 100px 1fr auto; gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  align-items: center;
}
.post-item:hover h3 { color: #0a5cff; }
@media (max-width: 640px) { .post-item { grid-template-columns: 1fr; gap: 0.4rem; } }
.post-number { font-family: 'Fraunces', serif; font-size: 1.8rem; color: #bbb; font-weight: 500; }
.post-title { margin: 0; }
.post-title a { color: inherit; }
.post-meta { font-size: 0.85rem; color: #888; }
.post-excerpt { color: #555; margin: 0.25rem 0 0; font-size: 0.95rem; }

/* ---------- Article ---------- */
.article-header { padding: 4rem 0 2rem; text-align: center; }
.article-kicker { font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: #0a5cff; font-weight: 600; }
.article-title { margin: 0.75rem auto 1rem; max-width: 760px; }
.article-meta { color: #888; font-size: 0.9rem; }
.article-body { padding: 1rem 0 4rem; font-size: 1.08rem; color: #2a2a2a; }
.article-body h2 { margin-top: 2.5rem; }
.article-body h3 { margin-top: 2rem; }
.article-body p, .article-body li { line-height: 1.75; }
.article-body blockquote {
  margin: 1.5rem 0; padding: 1rem 1.25rem;
  border-left: 3px solid #0a5cff;
  background: rgba(10,92,255,0.04);
  font-style: italic; color: #333;
}
.article-body code {
  background: #f0ece5; padding: 0.15em 0.4em; border-radius: 4px;
  font-family: 'JetBrains Mono', Menlo, monospace; font-size: 0.92em;
}
.article-body pre {
  background: #1a1a1a; color: #eee; padding: 1.25rem; border-radius: 10px;
  overflow-x: auto; font-family: 'JetBrains Mono', Menlo, monospace;
  font-size: 0.9rem; line-height: 1.6;
}
.article-body pre code { background: none; padding: 0; color: inherit; }
.article-body ul, .article-body ol { padding-left: 1.5rem; }
.article-nav {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 2rem 0; border-top: 1px solid rgba(0,0,0,0.08);
  font-size: 0.9rem;
}
.article-nav a { color: #555; font-weight: 500; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; }
@media (max-width: 780px) { .about-grid { grid-template-columns: 1fr; } }
.about-card {
  padding: 2rem; background: #fff; border-radius: 16px;
  border: 1px solid rgba(0,0,0,0.06);
  position: sticky; top: 90px; height: fit-content;
}
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li {
  padding: 1.25rem 0; border-bottom: 1px dashed rgba(0,0,0,0.08);
}
.timeline li:last-child { border-bottom: 0; }
.timeline-role { font-family: 'Fraunces', serif; font-size: 1.15rem; font-weight: 600; }
.timeline-company { color: #0a5cff; font-weight: 500; }
.timeline-period { color: #888; font-size: 0.85rem; margin-left: 0.5rem; }
.timeline-detail { color: #555; margin-top: 0.4rem; font-size: 0.95rem; }

/* ---------- Footer ---------- */
.footer {
  padding: 3rem 0; text-align: center;
  border-top: 1px solid rgba(0,0,0,0.06);
  color: #888; font-size: 0.9rem;
}
.footer-links { display: flex; gap: 1.5rem; justify-content: center; margin-bottom: 1rem; }

/* ---------- Newsletter ---------- */
.newsletter {
  background: #1a1a1a; color: #fafaf7;
  padding: 4rem 0;
}
.newsletter h2 { color: #fff; margin: 0 0 0.5rem; }
.newsletter p { color: #bbb; margin-bottom: 1.5rem; }
.newsletter-form { display: flex; gap: 0.75rem; max-width: 480px; }
.newsletter-form input {
  flex: 1; padding: 0.85rem 1rem; border-radius: 10px; border: 0;
  background: #2a2a2a; color: #fafaf7; font-size: 0.95rem;
}
.newsletter-form input::placeholder { color: #888; }
.newsletter-form button {
  background: #fafaf7; color: #1a1a1a; border: 0; padding: 0.85rem 1.4rem;
  border-radius: 10px; font-weight: 600; cursor: pointer;
}
@media (max-width: 560px) {
  .newsletter-form { flex-direction: column; }
}