/* ─── Variables ─────────────────────────────────────────────── */
:root {
  --bg:         #0f172a;
  --surface:    #1e293b;
  --border:     #334155;
  --text:       #f1f5f9;
  --muted:      #94a3b8;
  --accent:     #06b6d4;
  --accent-dim: #0891b2;
  --danger:     #f87171;
  --radius:     6px;
  --max-w:      1100px;
  --post-w:     750px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dim); text-decoration: underline; }

/* ─── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--text);
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); margin-bottom: .5rem; }
h3 { font-size: 1.15rem; }
p  { color: var(--text); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ─── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main { flex: 1; }

section { padding: 4rem 0; }
section + section { border-top: 1px solid var(--border); }

/* ─── Nav ────────────────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent); text-decoration: none; }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: .9rem;
  font-weight: 500;
  transition: color .15s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .25rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  transition: all .2s;
}

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  padding: 5rem 0 4rem;
  border-top: none;
}

.hero-eyebrow {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .85rem;
  color: var(--accent);
  letter-spacing: .05em;
  margin-bottom: .75rem;
}

.hero h1 { margin-bottom: .5rem; }

.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 1.5rem;
}

.hero-value {
  font-size: clamp(.95rem, 2vw, 1.05rem);
  color: var(--text);
  max-width: 640px;
  line-height: 1.65;
  margin-bottom: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
}

.cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: .6rem 1.4rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #0f172a;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: #0f172a;
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: #0f172a;
  text-decoration: none;
}

/* ─── About Snapshot ─────────────────────────────────────────── */
.about-snapshot p {
  color: var(--muted);
  font-size: 1rem;
  max-width: 680px;
}

/* ─── Credential Badges ─────────────────────────────────────── */
.cred-strip {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.25rem;
}

.badge {
  display: inline-block;
  padding: .3rem .75rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
  letter-spacing: .02em;
}

/* ─── Post Cards ─────────────────────────────────────────────── */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.75rem;
}

.section-header a {
  font-size: .85rem;
  color: var(--muted);
}
.section-header a:hover { color: var(--accent); }

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: border-color .15s;
}
.post-card:hover { border-color: var(--accent); }

.post-card .card-date {
  font-size: .78rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.post-card h3 {
  font-size: 1.05rem;
  line-height: 1.35;
}
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--accent); text-decoration: none; }

.post-card p {
  font-size: .9rem;
  color: var(--muted);
  line-height: 1.55;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.tag {
  font-size: .72rem;
  font-weight: 600;
  padding: .2rem .55rem;
  border-radius: 999px;
  background: rgba(6, 182, 212, .1);
  color: var(--accent);
  border: 1px solid rgba(6, 182, 212, .25);
  cursor: pointer;
  transition: background .15s;
}
.tag:hover, .tag.active { background: rgba(6, 182, 212, .25); text-decoration: none; }

.card-read-more {
  font-size: .85rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: .25rem;
}

.coming-soon-label {
  font-size: .72rem;
  color: var(--muted);
  font-style: italic;
}

/* ─── Blog Index ─────────────────────────────────────────────── */
.blog-header { padding: 3rem 0 2rem; border-top: none; }
.blog-header h1 { margin-bottom: .5rem; }
.blog-header p { color: var(--muted); }

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 2rem;
}

.tag-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .8rem;
  font-weight: 600;
  padding: .3rem .8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s;
}
.tag-btn:hover { border-color: var(--accent); color: var(--accent); }
.tag-btn.active { background: rgba(6,182,212,.15); border-color: var(--accent); color: var(--accent); }

.post-list { display: flex; flex-direction: column; gap: 1.25rem; }

.post-list-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .5rem 1.5rem;
  align-items: start;
  transition: border-color .15s;
}
.post-list-item:hover { border-color: var(--accent); }

.post-list-item h2 {
  font-size: 1.1rem;
  margin-bottom: .3rem;
}
.post-list-item h2 a { color: var(--text); }
.post-list-item h2 a:hover { color: var(--accent); text-decoration: none; }

.post-list-item .excerpt {
  font-size: .9rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: .6rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}

.post-date {
  font-size: .78rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
}

.post-read-time {
  font-size: .78rem;
  color: var(--muted);
}

.hidden { display: none !important; }

/* ─── Post Layout ────────────────────────────────────────────── */
.post-container {
  max-width: var(--post-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.post-header { margin-bottom: 2rem; }

.post-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.post-header-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: .85rem;
  margin-bottom: .75rem;
}

.post-header-meta .dot { opacity: .4; }

.post-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.5rem; }

.post-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0 2.5rem;
}

/* ─── Post Content ───────────────────────────────────────────── */
.post-content {
  font-size: 1.0rem;
  line-height: 1.8;
  color: var(--text);
}

.post-content h2 { margin: 2.5rem 0 .75rem; padding-top: .5rem; }
.post-content h3 { margin: 2rem 0 .6rem; }
.post-content h4 { margin: 1.5rem 0 .5rem; color: var(--muted); }

.post-content p { margin-bottom: 1.25rem; }
.post-content ul, .post-content ol { margin: 0 0 1.25rem 1.5rem; }
.post-content li { margin-bottom: .35rem; }
.post-content li::marker { color: var(--accent); }

.post-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.5rem 0;
  padding: .75rem 1.25rem;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-style: italic;
}

.post-content a { text-decoration: underline; text-underline-offset: 2px; }

/* Inline code */
.post-content code:not([class]) {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: .15em .4em;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .88em;
  color: var(--accent);
}

/* Code blocks */
.post-content pre,
.highlight {
  background: #0d1117 !important;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
}

.post-content pre code,
.highlight code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .85rem;
  line-height: 1.6;
  display: block;
  padding: 1.25rem 1.5rem;
  background: none !important;
  border: none !important;
  color: #c9d1d9;
}

/* Rouge syntax highlight tokens */
.highlight .k  { color: #ff7b72; }  /* keyword */
.highlight .kd { color: #ff7b72; }
.highlight .o  { color: #ff7b72; }  /* operator */
.highlight .s  { color: #a5d6ff; }  /* string */
.highlight .s1 { color: #a5d6ff; }
.highlight .s2 { color: #a5d6ff; }
.highlight .mi { color: #79c0ff; }  /* number */
.highlight .nb { color: #d2a8ff; }  /* builtin */
.highlight .nc { color: #ffa657; }  /* class name */
.highlight .nf { color: #d2a8ff; }  /* function */
.highlight .c1 { color: #8b949e; font-style: italic; } /* comment */
.highlight .cm { color: #8b949e; font-style: italic; }
.highlight .na { color: #79c0ff; }  /* attribute */
.highlight .nt { color: #7ee787; }  /* tag */
.highlight .p  { color: #c9d1d9; }  /* punctuation */

/* Language label */
.post-content .highlight::before,
div[data-lang]::before {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: .7rem;
  color: var(--muted);
  padding: .5rem 1.5rem .25rem;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* ─── Post Nav ───────────────────────────────────────────────── */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.post-nav-link {
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .15s;
}
.post-nav-link:hover { border-color: var(--accent); text-decoration: none; }

.post-nav-link.next { text-align: right; }

.post-nav-label {
  font-size: .72rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  display: block;
  margin-bottom: .25rem;
}

.post-nav-title {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}

/* ─── Share Bar ──────────────────────────────────────────────── */
.share-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.share-bar span {
  font-size: .85rem;
  color: var(--muted);
  font-weight: 600;
}

.share-linkedin {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem 1rem;
  background: #0a66c2;
  color: #fff;
  border-radius: var(--radius);
  font-size: .85rem;
  font-weight: 600;
  transition: background .15s;
}
.share-linkedin:hover { background: #004182; color: #fff; text-decoration: none; }

/* ─── About Page ─────────────────────────────────────────────── */
.about-hero { padding: 3rem 0 2rem; border-top: none; }
.about-hero h1 { margin-bottom: .5rem; }
.about-hero .subtitle { color: var(--muted); font-size: 1.05rem; }

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}

.about-body p { color: var(--muted); margin-bottom: 1.25rem; }
.about-body h2 { margin: 2rem 0 .75rem; font-size: 1.15rem; }

.cert-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.cert-list li {
  font-size: .9rem;
  color: var(--muted);
  padding: .4rem .75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: .6rem;
}
.cert-list li::before {
  content: "▸";
  color: var(--accent);
  font-size: .75rem;
}

.connect-links { display: flex; flex-direction: column; gap: .6rem; margin-top: .75rem; }

.connect-link {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .9rem;
  color: var(--accent);
  padding: .5rem .75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .15s;
}
.connect-link:hover { border-color: var(--accent); text-decoration: none; color: var(--accent); }

.sidebar-section { margin-bottom: 2rem; }
.sidebar-section h3 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: .75rem; }

/* ─── Work Page ──────────────────────────────────────────────── */
.work-hero { padding: 3rem 0 2rem; border-top: none; }
.work-hero h1 { margin-bottom: .5rem; }
.work-hero p { color: var(--muted); }

.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin-bottom: 1.25rem;
  transition: border-color .15s;
}
.work-card:hover { border-color: var(--accent); }

.work-card h3 { margin-bottom: .5rem; }
.work-card h3 a { color: var(--text); }
.work-card h3 a:hover { color: var(--accent); text-decoration: none; }

.work-card p { color: var(--muted); font-size: .95rem; margin-bottom: .75rem; }

.work-card .card-link {
  font-size: .85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}

.build-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: .75rem;
  margin-top: .75rem;
}

.build-list li {
  padding: .75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--muted);
  display: flex;
  align-items: flex-start;
  gap: .6rem;
}
.build-list li::before {
  content: "▸";
  color: var(--accent);
  font-size: .75rem;
  margin-top: .2rem;
  flex-shrink: 0;
}

.philosophy-block {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
}
.philosophy-block p { color: var(--muted); font-size: .95rem; }

/* ─── Footer ─────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: .82rem;
  color: var(--muted);
}

footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }
.footer-links { display: flex; justify-content: center; gap: 1.5rem; margin-bottom: .75rem; flex-wrap: wrap; }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 1rem 1.5rem; gap: 1rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  header { position: relative; }

  .post-grid { grid-template-columns: 1fr; }
  .post-list-item { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .section-header { flex-direction: column; gap: .5rem; }
  section { padding: 2.5rem 0; }
}

@media (max-width: 480px) {
  .cta-group { flex-direction: column; }
  .btn { text-align: center; }
  .post-container { padding: 2rem 1rem 3rem; }
}

/* ─── Utilities ─────────────────────────────────────────────── */
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.mono { font-family: 'JetBrains Mono', monospace; }