/* deniscreighton.com — Technical Founder Site
   Design system: graphite + ivory + terminal-emerald + amber
   Distinct from Mike English (cool navy/cyan) — Denis: warm executive / engineer console */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400&family=JetBrains+Mono:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Surfaces */
  --dc-bg:        #0D1117;          /* graphite */
  --dc-bg-2:      #161B22;          /* gh-dark elevated */
  --dc-bg-3:      #21262D;
  --dc-ivory:     #F0EAD6;          /* warm parchment */
  --dc-line:      rgba(240,234,214,0.10);
  --dc-line-2:    rgba(240,234,214,0.20);

  /* Type */
  --dc-fg:        #F0EAD6;
  --dc-fg-mute:   rgba(240,234,214,0.65);
  --dc-fg-dim:    rgba(240,234,214,0.40);

  /* Signals */
  --dc-emerald:   #3FB950;          /* terminal emerald — verified/live */
  --dc-amber:     #D29922;          /* legacy / leadership warm */
  --dc-blue:      #58A6FF;          /* signal blue — link/data */
  --dc-rose:      #F85149;          /* alert / accent */

  /* Families */
  --dc-serif:     'Newsreader', 'Times New Roman', serif;
  --dc-sans:      'Inter', system-ui, -apple-system, sans-serif;
  --dc-mono:      'JetBrains Mono', ui-monospace, monospace;

  --dc-ease:      cubic-bezier(.22,1,.36,1);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--dc-bg);
  color: var(--dc-fg);
  font-family: var(--dc-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
a { color: inherit; text-decoration: none; transition: color .2s var(--dc-ease); }
a:hover { color: var(--dc-emerald); }

/* Terminal grid background */
.dc-grid {
  background-image:
    linear-gradient(var(--dc-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--dc-line) 1px, transparent 1px);
  background-size: 56px 56px;
}

.dc-mono { font-family: var(--dc-mono); font-feature-settings:'ss01','calt'; }
.dc-eyebrow {
  font-family: var(--dc-mono);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--dc-fg-mute);
}
.dc-display {
  font-family: var(--dc-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.96;
}
.dc-display em { font-style: italic; color: var(--dc-emerald); }

/* Header */
.dc-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dc-line);
}
.dc-nav-inner {
  max-width: 1240px; margin: 0 auto;
  padding: 14px 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.dc-brand {
  display: flex; gap: 12px; align-items: center;
  font-family: var(--dc-mono); font-size: 13px; font-weight: 600;
  letter-spacing: 0.05em;
}
.dc-brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--dc-emerald);
  box-shadow: 0 0 10px var(--dc-emerald);
  animation: dc-pulse 2s ease-in-out infinite;
}
.dc-nav-links {
  display: flex; gap: 28px;
  font-family: var(--dc-mono); font-size: 12px;
  color: var(--dc-fg-mute); text-transform: uppercase;
  letter-spacing: 0.1em;
}
.dc-nav-links a:hover { color: var(--dc-fg); }

/* Hero */
.dc-hero {
  position: relative;
  min-height: 92vh;
  padding: 100px 24px 80px;
  display: flex; align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--dc-line);
}
.dc-hero::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--dc-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--dc-line) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .55;
  mask-image: radial-gradient(ellipse at 30% 50%, #000 30%, transparent 80%);
  pointer-events: none;
}
.dc-hero-inner {
  max-width: 1240px; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px;
  align-items: center;
  position: relative; z-index: 1;
}
.dc-hero h1 {
  font-family: var(--dc-serif);
  font-size: clamp(48px, 7.5vw, 96px);
  line-height: 0.96; letter-spacing: -0.025em;
  margin: 16px 0 24px;
  font-weight: 400;
}
.dc-hero h1 em { font-style: italic; color: var(--dc-emerald); }
.dc-hero-sub {
  color: var(--dc-fg-mute);
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.55; max-width: 56ch;
  margin: 0 0 36px;
}
.dc-hero-meta {
  display: grid; grid-template-columns: repeat(3, auto);
  gap: 28px;
  font-family: var(--dc-mono); font-size: 12px;
  color: var(--dc-fg-dim);
  border-top: 1px solid var(--dc-line);
  padding-top: 24px;
}
.dc-hero-meta strong { color: var(--dc-fg); display: block; font-weight: 600; margin-top: 4px; font-size: 14px; }
.dc-portrait-wrap {
  position: relative;
  border: 1px solid var(--dc-line-2);
  background: var(--dc-bg-2);
  padding: 8px;
  aspect-ratio: 1/1.05;
  overflow: hidden;
}
.dc-portrait-wrap::after {
  content: ''; position: absolute; inset: 0;
  border: 1px solid var(--dc-emerald);
  opacity: 0.25;
  pointer-events: none;
}
.dc-portrait { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.05) saturate(0.92); }
.dc-portrait-tag {
  position: absolute; bottom: 14px; left: 14px;
  font-family: var(--dc-mono); font-size: 10px;
  background: rgba(13,17,23,0.85); padding: 6px 10px;
  border: 1px solid var(--dc-emerald);
  color: var(--dc-emerald);
  letter-spacing: 0.15em; text-transform: uppercase;
}

/* Section base */
.dc-section { padding: 100px 24px; border-bottom: 1px solid var(--dc-line); }
.dc-section-inner { max-width: 1240px; margin: 0 auto; }
.dc-section h2 {
  font-family: var(--dc-serif);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 400; line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 16px 0 32px; max-width: 24ch;
}
.dc-section h2 em { font-style: italic; color: var(--dc-emerald); }
.dc-section-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 80px; }
.dc-section-grid p { font-size: 17px; line-height: 1.6; color: var(--dc-fg-mute); margin: 0 0 18px; }

/* Stat strip */
.dc-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--dc-line);
  border-bottom: 1px solid var(--dc-line);
  margin: 48px 0;
}
.dc-stat {
  padding: 28px 0;
  border-right: 1px solid var(--dc-line);
}
.dc-stat:last-child { border-right: 0; }
.dc-stat-num {
  font-family: var(--dc-serif); font-size: 42px; font-weight: 400;
  line-height: 1; color: var(--dc-fg);
  letter-spacing: -0.02em;
}
.dc-stat-num em { font-style: italic; color: var(--dc-amber); }
.dc-stat-label {
  font-family: var(--dc-mono); font-size: 11px;
  color: var(--dc-fg-dim);
  text-transform: uppercase; letter-spacing: 0.15em;
  margin-top: 8px;
}

/* Card */
.dc-card {
  background: var(--dc-bg-2);
  border: 1px solid var(--dc-line-2);
  padding: 32px;
  transition: border-color .25s var(--dc-ease), background .25s var(--dc-ease);
}
.dc-card:hover { border-color: var(--dc-emerald); background: var(--dc-bg-3); }
.dc-card-tag {
  font-family: var(--dc-mono); font-size: 10px;
  color: var(--dc-emerald); text-transform: uppercase;
  letter-spacing: 0.18em; margin-bottom: 14px;
}
.dc-card h3 {
  font-family: var(--dc-serif); font-weight: 500;
  font-size: 26px; line-height: 1.18; letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.dc-card p { color: var(--dc-fg-mute); font-size: 15px; line-height: 1.55; margin: 0; }

/* Verified rows */
.dc-verify-row {
  display: grid;
  grid-template-columns: 28px 220px 1fr auto;
  gap: 20px; padding: 20px 0;
  border-top: 1px solid var(--dc-line);
  align-items: center;
  font-family: var(--dc-mono); font-size: 13px;
}
.dc-verify-row:first-of-type { border-top: 1px solid var(--dc-line-2); }
.dc-verify-row:last-of-type { border-bottom: 1px solid var(--dc-line-2); }
.dc-verify-tick {
  color: var(--dc-emerald); font-weight: 700;
  border: 1px solid var(--dc-emerald);
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
}
.dc-verify-key { color: var(--dc-fg-dim); text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px; }
.dc-verify-val { color: var(--dc-fg); }
.dc-verify-link a { color: var(--dc-blue); }
.dc-verify-link a:hover { color: var(--dc-emerald); }

/* Code block / terminal */
.dc-terminal {
  background: var(--dc-bg-2);
  border: 1px solid var(--dc-line-2);
  font-family: var(--dc-mono);
  font-size: 13px; line-height: 1.65;
  color: var(--dc-fg-mute);
  padding: 24px;
  overflow-x: auto;
}
.dc-terminal-bar {
  display: flex; gap: 6px;
  margin: -24px -24px 18px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--dc-line);
  background: var(--dc-bg-3);
}
.dc-terminal-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--dc-line-2); }
.dc-terminal-dot.r { background: #FF5F56; }
.dc-terminal-dot.y { background: #FFBD2E; }
.dc-terminal-dot.g { background: #27C93F; }
.dc-terminal .k { color: var(--dc-emerald); }
.dc-terminal .v { color: var(--dc-amber); }
.dc-terminal .c { color: var(--dc-fg-dim); }
.dc-terminal .l { color: var(--dc-blue); }

/* Footer */
.dc-foot {
  padding: 60px 24px 40px;
  border-top: 1px solid var(--dc-line-2);
  font-family: var(--dc-mono); font-size: 12px;
  color: var(--dc-fg-dim);
}
.dc-foot-inner {
  max-width: 1240px; margin: 0 auto;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px;
}
.dc-foot a { color: var(--dc-fg-mute); }
.dc-foot a:hover { color: var(--dc-emerald); }

@keyframes dc-pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: 0.55; transform: scale(0.85); }
}

/* Mobile */
@media (max-width: 900px) {
  .dc-nav-links { display: none; }
  .dc-hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .dc-portrait-wrap { max-width: 380px; }
  .dc-section-grid { grid-template-columns: 1fr; gap: 24px; }
  .dc-stats { grid-template-columns: 1fr 1fr; }
  .dc-stat:nth-child(2) { border-right: 0; }
  .dc-verify-row { grid-template-columns: 28px 1fr; gap: 12px; }
  .dc-verify-link, .dc-verify-key { display: none; }
}

/* Cards-grid */
.dc-cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.dc-cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 900px) { .dc-cards-3, .dc-cards-2 { grid-template-columns: 1fr; } }

/* Article body */
.dc-article {
  max-width: 760px;
  margin: 0 auto;
  font-family: var(--dc-sans);
}
.dc-article-meta {
  display: flex; gap: 20px; flex-wrap: wrap;
  font-family: var(--dc-mono); font-size: 11px;
  color: var(--dc-fg-dim);
  text-transform: uppercase; letter-spacing: 0.15em;
  border-top: 1px solid var(--dc-line);
  border-bottom: 1px solid var(--dc-line);
  padding: 16px 0;
  margin: 32px 0 48px;
}
.dc-article h1 {
  font-family: var(--dc-serif); font-weight: 400;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05; letter-spacing: -0.02em;
  margin: 0 0 24px;
}
.dc-article h1 em { font-style: italic; color: var(--dc-emerald); }
.dc-article h2 {
  font-family: var(--dc-serif); font-weight: 500;
  font-size: 28px; line-height: 1.2; letter-spacing: -0.01em;
  margin: 56px 0 20px;
}
.dc-article h3 {
  font-family: var(--dc-mono); font-weight: 600;
  font-size: 14px; text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--dc-emerald);
  margin: 40px 0 16px;
}
.dc-article p, .dc-article ul, .dc-article ol {
  font-size: 17.5px; line-height: 1.62;
  color: var(--dc-fg);
  margin: 0 0 22px;
}
.dc-article ul, .dc-article ol { padding-left: 22px; }
.dc-article li { margin-bottom: 8px; }
.dc-article blockquote {
  border-left: 2px solid var(--dc-emerald);
  margin: 32px 0;
  padding: 4px 0 4px 24px;
  font-family: var(--dc-serif);
  font-style: italic;
  font-size: 22px; line-height: 1.45;
  color: var(--dc-fg);
}
.dc-article strong { color: var(--dc-fg); font-weight: 600; }
.dc-article em { color: var(--dc-emerald); font-style: italic; }
.dc-article code {
  font-family: var(--dc-mono);
  background: var(--dc-bg-2);
  padding: 2px 8px;
  border: 1px solid var(--dc-line);
  font-size: 0.92em;
  color: var(--dc-amber);
}
.dc-article hr {
  border: 0; border-top: 1px solid var(--dc-line);
  margin: 56px 0;
}
.dc-pull {
  background: var(--dc-bg-2);
  border: 1px solid var(--dc-line-2);
  border-left: 3px solid var(--dc-emerald);
  padding: 24px 28px;
  margin: 32px 0;
  font-family: var(--dc-serif);
  font-size: 19px;
  line-height: 1.45;
}
.dc-back {
  display: inline-block;
  font-family: var(--dc-mono); font-size: 12px;
  color: var(--dc-fg-mute); text-transform: uppercase; letter-spacing: 0.12em;
  margin-top: 64px; padding: 8px 14px;
  border: 1px solid var(--dc-line-2);
}
.dc-back:hover { border-color: var(--dc-emerald); color: var(--dc-emerald); }

/* ============= DEEP NAV — sub-nav within nav ============= */
.dc-subnav {
  background: var(--dc-bg-2);
  border-bottom: 1px solid var(--dc-line);
  padding: 10px 0;
  font-family: var(--dc-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.dc-subnav-inner {
  max-width: 1240px; margin: 0 auto;
  padding: 0 24px;
  display: flex; gap: 22px; flex-wrap: wrap;
  color: var(--dc-fg-dim);
}
.dc-subnav a { color: var(--dc-fg-mute); }
.dc-subnav a:hover { color: var(--dc-emerald); }
.dc-subnav .active { color: var(--dc-emerald); }
.dc-subnav span.sep { color: var(--dc-fg-dim); }

/* Image gallery / mosaic */
.dc-mosaic {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin: 32px 0;
}
.dc-mosaic img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  border: 1px solid var(--dc-line-2);
  filter: contrast(1.05) saturate(0.95);
  transition: transform .3s var(--dc-ease), border-color .3s var(--dc-ease);
}
.dc-mosaic img:hover { transform: scale(1.02); border-color: var(--dc-emerald); }
.dc-mosaic-feature { grid-column: span 2; grid-row: span 2; }
.dc-mosaic-feature img { aspect-ratio: 1/1; }
@media (max-width: 768px) { .dc-mosaic { grid-template-columns: 1fr 1fr; gap: 8px; } .dc-mosaic-feature { grid-column: span 2; } }

/* Big image hero */
.dc-bighero {
  width: 100%; max-width: 1240px; margin: 0 auto 60px;
  border: 1px solid var(--dc-line-2);
  position: relative;
  overflow: hidden;
}
.dc-bighero img { width: 100%; aspect-ratio: 16/7; object-fit: cover; display: block; filter: contrast(1.04); }
.dc-bighero-cap {
  position: absolute; bottom: 16px; left: 16px;
  font-family: var(--dc-mono); font-size: 11px;
  background: rgba(13,17,23,0.85);
  border: 1px solid var(--dc-emerald);
  padding: 6px 12px;
  color: var(--dc-emerald); letter-spacing: 0.15em; text-transform: uppercase;
}

/* Inline image card */
.dc-img-card {
  border: 1px solid var(--dc-line-2);
  background: var(--dc-bg-2);
  padding: 8px;
  margin: 32px 0;
}
.dc-img-card img { width: 100%; height: auto; display: block; }
.dc-img-card-cap {
  font-family: var(--dc-mono); font-size: 11px;
  color: var(--dc-fg-dim);
  padding: 12px 4px 4px;
  letter-spacing: 0.12em; text-transform: uppercase;
}

/* Mobile improvements */
@media (max-width: 768px) {
  .dc-hero { padding: 48px 16px 56px; min-height: auto; }
  .dc-hero-inner { gap: 28px !important; }
  .dc-portrait-wrap { max-width: 240px; margin: 0 0 0 auto; }
  .dc-section { padding: 56px 16px; }
  .dc-section h2 { font-size: 30px !important; }
  .dc-stats { grid-template-columns: 1fr 1fr !important; }
  .dc-stat:nth-child(2) { border-right: 0; }
  .dc-stat:nth-child(3),.dc-stat:nth-child(4) { border-top: 1px solid var(--dc-line); }
  .dc-stat-num { font-size: 32px !important; }
  .dc-card { padding: 22px; }
  .dc-card h3 { font-size: 20px !important; }
  .dc-cards-3,.dc-cards-2 { gap: 14px !important; }
  .dc-section-grid { gap: 24px !important; }
  
  .dc-foot-inner { flex-direction: column; gap: 16px; }
  .dc-article p, .dc-article ul, .dc-article ol { font-size: 16px; }
  .dc-article h1 { font-size: 32px; }
  .dc-article h2 { font-size: 22px; margin: 36px 0 14px; }
  .dc-mosaic { grid-template-columns: 1fr 1fr; }
  .dc-bighero img { aspect-ratio: 4/3; }
}

/* Smaller — really tight phones */
@media (max-width: 380px) {
  .dc-nav-inner { padding: 10px 14px; }
  .dc-brand { font-size: 11px; gap: 8px; }
  .dc-nav-links a { display: inline-block; padding: 0; }
}

/* Featured links grid */
.dc-link-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--dc-line);
  border-bottom: 1px solid var(--dc-line);
  margin: 40px 0;
}
.dc-link-grid a {
  padding: 24px 20px;
  border-right: 1px solid var(--dc-line);
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dc-fg-mute);
  display: flex; flex-direction: column; gap: 6px;
}
.dc-link-grid a:last-child { border-right: 0; }
.dc-link-grid a:hover { background: var(--dc-bg-2); color: var(--dc-emerald); }
.dc-link-grid a strong { color: var(--dc-fg); font-family: var(--dc-serif); font-size: 18px; font-weight: 500; text-transform: none; letter-spacing: -0.01em; }
@media (max-width: 768px) { .dc-link-grid { grid-template-columns: 1fr 1fr; } .dc-link-grid a:nth-child(2n) { border-right: 0; } .dc-link-grid a:nth-child(n+3) { border-top: 1px solid var(--dc-line); } }

/* Two-col long-form */
.dc-twocol {
  column-count: 2; column-gap: 48px;
  font-size: 16px; line-height: 1.65; color: var(--dc-fg);
}
.dc-twocol p { margin: 0 0 18px; }
@media (max-width: 768px) { .dc-twocol { column-count: 1; } }


/* === Mobile hamburger nav — Mike directive 2026-05-04 === */
.dc-burger {
  display: none;
  background: none; border: 0; padding: 8px;
  cursor: pointer; z-index: 100;
  width: 40px; height: 40px;
}
.dc-burger span {
  display: block; width: 22px; height: 2px;
  background: var(--dc-fg); margin: 4px auto;
  transition: all 0.25s ease;
}
.dc-mobile-menu {
  display: none;
  position: fixed; inset: 0;
  background: var(--dc-bg);
  z-index: 1000;
  padding: 80px 32px 32px;
  flex-direction: column; gap: 24px;
}
.dc-mobile-menu.open { display: flex; }
.dc-mobile-menu a {
  font-family: var(--dc-serif);
  font-size: 28px; font-weight: 400;
  color: var(--dc-fg);
  letter-spacing: -0.01em;
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid var(--dc-line);
}
.dc-mobile-menu a:hover { color: var(--dc-emerald); }
.dc-mobile-close {
  position: absolute; top: 18px; right: 18px;
  background: none; border: 0; color: var(--dc-fg);
  font-size: 32px; cursor: pointer; padding: 4px 12px;
}
@media (max-width: 900px) {
  .dc-burger { display: block; }
  .dc-nav-links { display: none !important; }
}