/* ─── Variables ─────────────────────────────────────────── */
:root {
  --bg:          #1a1f2e;
  --bg-surface:  #212736;
  --bg-raised:   #283044;
  --green:       #00c896;
  --green-dim:   rgba(0, 200, 150, 0.15);
  --green-faint: rgba(0, 200, 150, 0.06);
  --text:        #e8eaf0;
  --text-muted:  #8a92a8;
  --text-dim:    #545c72;
  --border:      rgba(0, 200, 150, 0.15);
  --border-mid:  rgba(0, 200, 150, 0.28);
  --font-mono:   'Share Tech Mono', 'Courier New', monospace;
  --font-display:'Orbitron', monospace;
  --font-body:   'Rajdhani', sans-serif;
  --max-w:       1100px;
  --prose-w:     740px;
}

[data-theme="light"] {
  --bg:          #f2ede8;
  --bg-surface:  #e8e2db;
  --bg-raised:   #ddd7cf;
  --green:       #00a878;
  --green-dim:   rgba(0, 168, 120, 0.12);
  --green-faint: rgba(0, 168, 120, 0.05);
  --text:        #1e2230;
  --text-muted:  #4a5060;
  --text-dim:    #8a909e;
  --border:      rgba(0, 168, 120, 0.2);
  --border-mid:  rgba(0, 168, 120, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

/* ─── Grid background ───────────────────────────────────── */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,150,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,150,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

/* ─── Nav ───────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  background: rgba(26, 31, 46, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

[data-theme="light"] .nav { background: rgba(242, 237, 232, 0.9); }

.nav-logo {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.2s;
}

.nav-logo span { color: var(--green); }
.nav-logo .nav-dot { color: var(--green); opacity: 0.6; }
.nav-logo:hover { color: var(--text); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--green); }

.theme-toggle {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border);
  padding: 6px 12px;
  cursor: pointer;
  letter-spacing: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.theme-toggle:hover { color: var(--green); border-color: var(--green); }

/* ─── Hero ──────────────────────────────────────────────── */
.hero {
  padding: 100px 48px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}

.hero-inner { max-width: 680px; margin: 0 auto; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--green);
  opacity: 0.4;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 900;
  color: var(--text);
  line-height: 1.05;
  margin-bottom: 8px;
}

.hero-title span { color: var(--green); }

.hero-sub {
  font-family: var(--font-display);
  font-size: clamp(10px, 1.5vw, 13px);
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 44px;
}

.hero-divider {
  width: 48px;
  height: 1px;
  background: var(--green);
  opacity: 0.35;
  margin: 0 auto 36px;
}

.hero-statement {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  font-weight: 300;
}

.hero-statement strong { color: var(--text); font-weight: 600; }

.hero-body {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 44px;
  font-weight: 300;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Buttons ───────────────────────────────────────────── */
.btn-primary {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--green);
  padding: 12px 28px;
  text-decoration: none;
  transition: opacity 0.2s;
  display: inline-block;
}

.btn-primary:hover { opacity: 0.85; }

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid var(--border-mid);
  padding: 12px 28px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
  display: inline-block;
}

.btn-ghost:hover { border-color: var(--green); color: var(--text); }

.btn-ghost-sm { font-size: 10px; padding: 8px 16px; letter-spacing: 1px; }

.page-tag-link { text-decoration: none; display: inline-block; }
.page-tag-link:hover { color: var(--text); }

/* ─── Sections ──────────────────────────────────────────── */
.section {
  padding: 72px 48px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 48px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 3px;
  white-space: nowrap;
}

.section-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 2px;
  text-transform: uppercase;
  white-space: nowrap;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-more {
  margin-top: 40px;
  text-align: center;
}

/* ─── Article cards ─────────────────────────────────────── */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.article-card {
  display: block;
  padding: 28px 32px;
  background: var(--green-faint);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}

.article-card:hover {
  border-color: var(--border-mid);
  background: var(--green-dim);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
}

.article-card-date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.article-card-tags { display: flex; gap: 8px; }

.tag {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--green);
  letter-spacing: 1px;
  border: 1px solid var(--border);
  padding: 2px 8px;
}

.article-card-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.article-card-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.article-card-read {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 2px;
}

/* ─── Specialism grid ───────────────────────────────────── */
.specialism-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.specialism-card {
  padding: 32px 28px;
  background: var(--green-faint);
  border: 1px solid var(--border);
}

.specialism-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 2px;
  margin-bottom: 12px;
  opacity: 0.7;
}

.specialism-name {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.specialism-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  font-weight: 300;
}

/* ─── Page hero ─────────────────────────────────────────── */
.page-hero {
  padding: 72px 48px 48px;
  border-bottom: 1px solid var(--border);
}

.page-hero-inner { max-width: var(--max-w); margin: 0 auto; }

.page-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 3px;
  margin-bottom: 20px;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 640px;
  font-weight: 300;
}

.post-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* ─── Prose content ─────────────────────────────────────── */
.prose-content {
  max-width: var(--prose-w);
  font-size: 15px;
  color: var(--text);
  line-height: 1.85;
}

.prose-content h2 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.prose-content h3 {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin: 28px 0 12px;
}

.prose-content p { margin-bottom: 20px; color: var(--text-muted); }

.prose-content a { color: var(--green); text-decoration-color: rgba(0,200,150,0.3); }
.prose-content a:hover { color: var(--text); }

.prose-content strong { color: var(--text); font-weight: 600; }

.prose-content ul, .prose-content ol {
  margin: 0 0 20px 20px;
  color: var(--text-muted);
}

.prose-content li { margin-bottom: 8px; line-height: 1.7; }

.prose-content code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  background: var(--bg-surface);
  padding: 2px 6px;
}

.prose-content pre {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 24px;
  margin: 24px 0;
  overflow-x: auto;
}

.prose-content pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.prose-content blockquote {
  border-left: 2px solid var(--green);
  padding: 4px 20px;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}

.prose-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

.article-content { max-width: var(--prose-w); }

.post-footer { margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--border); }

/* ─── Empty state ───────────────────────────────────────── */
.empty-state {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 1px;
  padding: 48px 0;
}

/* ─── Footer ────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--green); }

.footer-copy {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.footer-copy a { color: var(--green); text-decoration: none; opacity: 0.7; }
.footer-copy a:hover { opacity: 1; }

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .nav-links { gap: 20px; }
  .hero { padding: 64px 24px 48px; }
  .section { padding: 48px 24px; }
  .page-hero { padding: 48px 24px 32px; }
  .specialism-grid { grid-template-columns: 1fr; }
  .footer { padding: 24px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}