:root {
  --bg: #0d1117;
  --bg-deep: #080b10;
  --bg-elevated: #161b22;
  --bg-card: #1c2230;
  --bg-card-grad: #232c3a;
  --bg-hover: #28303f;
  --border: #2d3748;
  --border-light: #3a4556;
  --text: #e6edf3;
  --text-muted: #a3adba;
  --text-dim: #7d8896;
  --brand-teal: #116677;
  --brand-teal-bright: #4FB3C7;
  --brand-red: #800A14;
  --brand-red-bright: #E54B5C;
  --accent: #E8B86D;
  --accent-dim: #b8924f;
  --max-width: 1100px;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-card: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-card-hover: 0 10px 30px rgba(79, 179, 199, 0.18), 0 4px 12px rgba(0, 0, 0, 0.5);
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  /* Layered backgrounds: subtle dot grid + multi-color gradient mesh */
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28'><circle cx='14' cy='14' r='0.7' fill='%234FB3C7' opacity='0.18'/></svg>"),
    radial-gradient(ellipse 1100px 700px at 12% -8%, rgba(17, 102, 119, 0.22), transparent 60%),
    radial-gradient(ellipse 900px 600px at 95% 8%, rgba(128, 10, 20, 0.16), transparent 60%),
    radial-gradient(ellipse 1000px 700px at 70% 95%, rgba(232, 184, 109, 0.10), transparent 65%),
    radial-gradient(ellipse 700px 500px at 25% 70%, rgba(79, 179, 199, 0.08), transparent 60%);
  background-attachment: fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--brand-teal-bright);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent); text-decoration: underline; }

h1, h2, h3, h4 {
  color: var(--text);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: 2.4rem; margin-bottom: 1rem; }
h2 { font-size: 1.7rem; margin: 2rem 0 1rem; color: var(--brand-teal-bright); }
h3 { font-size: 1.2rem; margin: 1.5rem 0 0.6rem; color: var(--accent); }

p { margin-bottom: 1rem; color: var(--text-muted); }

ul, ol { margin: 0.5rem 0 1.2rem 1.4rem; color: var(--text-muted); }
li { margin-bottom: 0.4rem; }

code {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92em;
  color: var(--accent);
}

/* Header / Nav */
.site-header {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(13, 17, 23, 0.88), rgba(13, 17, 23, 0.78));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
  /* thin gradient accent line under header */
  box-shadow: 0 1px 0 0 transparent;
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 179, 199, 0.5), rgba(232, 184, 109, 0.4), rgba(229, 75, 92, 0.4), transparent);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Subtle frosted backdrop: semi-transparent cream tint over the dark page,
   with a soft blur of the pattern behind. Just enough to lift the dark
   brand colors off the near-black background. */
.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  background: rgba(245, 238, 220, 0.10);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 5px 11px;
  border-radius: 8px;
  border: 1px solid rgba(245, 238, 220, 0.12);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.15s ease;
}
.logo-link:hover {
  text-decoration: none;
  background: rgba(245, 238, 220, 0.18);
  border-color: rgba(245, 238, 220, 0.22);
  transform: translateY(-1px);
}
.logo-link img { height: 30px; width: auto; display: block; }

nav.primary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

nav.primary a {
  color: var(--text-muted);
  font-size: 0.93rem;
  font-weight: 500;
  padding: 0.45rem 0.8rem;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
}
nav.primary a:hover {
  color: var(--text);
  background: var(--bg-card);
  text-decoration: none;
}
nav.primary a.active {
  color: var(--brand-teal-bright);
  background: var(--bg-card);
}

/* Layout */
main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  position: relative;
}

/* Hero (landing page) */
.hero {
  position: relative;
  text-align: center;
  padding: 3.5rem 1rem 2.5rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(ellipse 700px 320px at 50% 30%, rgba(17, 102, 119, 0.22), transparent 70%),
    linear-gradient(180deg, rgba(28, 34, 48, 0.55), rgba(13, 17, 23, 0.0));
  border: 1px solid var(--border);
}
/* Decorative flow pattern behind the hero */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/pattern-flow.svg");
  background-size: cover;
  background-position: center;
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}
/* Soft top-edge gradient accent */
.hero::after {
  content: "";
  position: absolute;
  left: 10%; right: 10%; top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 179, 199, 0.7), rgba(232, 184, 109, 0.5), transparent);
}
.hero > * { position: relative; z-index: 1; }

/* Hero logo sits on a semi-transparent cream wash with a backdrop blur —
   subtle enough to feel like the logo is on the dark page, opaque enough
   that the dark brand colors (#116677 SPANN, #800A14 .AI) still read. */
.hero-logo-wrap {
  display: inline-block;
  background: rgba(245, 238, 220, 0.12);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(245, 238, 220, 0.14);
  border-radius: 16px;
  padding: 1.4rem 2rem;
  margin: 0 auto 1.75rem;
  box-shadow:
    0 14px 38px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.hero-logo {
  max-width: 460px;
  width: 100%;
  height: auto;
  display: block;
}
.hero h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.hero .legal-name {
  color: var(--text-dim);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.tagline {
  font-size: 1.5rem;
  color: var(--accent);
  font-style: italic;
  margin: 1.5rem 0 2rem;
  font-weight: 500;
}
.intro {
  max-width: 720px;
  margin: 0 auto 2rem;
  font-size: 1.08rem;
  color: var(--text-muted);
}

/* Service cards grid (landing) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 2.5rem 0 1rem;
}
/* Locked 2-column variant — used for the 2x2 "What I do" grid and the
   2-card "Background" row on the landing page. Collapses to a single
   column on narrow viewports for readability. */
.card-grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (max-width: 600px) {
  .card-grid.cols-2 { grid-template-columns: 1fr; }
}

.card {
  position: relative;
  background:
    linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-grad) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
  display: block;
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  isolation: isolate; /* keep ::before/::after stacking clean */
}
/* Faint mesh texture inside cards */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/pattern-mesh.svg");
  background-size: 60px 52px;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
  mask-image: linear-gradient(135deg, rgba(0,0,0,0.9), rgba(0,0,0,0.0) 70%);
  -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,0.9), rgba(0,0,0,0.0) 70%);
}
/* Hover highlight: a soft warm radial wash from top-right */
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 0%, rgba(232, 184, 109, 0.14), transparent 55%),
    radial-gradient(circle at 0% 100%, rgba(79, 179, 199, 0.10), transparent 55%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
  z-index: 0;
}
.card > * { position: relative; z-index: 1; }

.card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  border-color: rgba(79, 179, 199, 0.65);
  box-shadow: var(--shadow-card-hover);
}
.card:hover::after { opacity: 1; }
.card h3 {
  margin-top: 0;
  color: var(--brand-teal-bright);
  transition: color 0.2s ease;
}
.card:hover h3 { color: var(--accent); }
.card p { color: var(--text-muted); margin-bottom: 0; }

/* Top gradient accent bar — a real element, since CSS pseudos are already
   used for the mesh texture and the hover wash. */
.card { background-clip: padding-box; }
.card-top {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-teal-bright), var(--accent) 55%, var(--brand-red-bright));
  opacity: 0.55;
  transition: opacity 0.2s ease;
  z-index: 2;
}
.card:hover .card-top { opacity: 1; }

/* Subpages */
.page-header {
  position: relative;
  border-bottom: 1px solid var(--border);
  padding: 0.4rem 1.5rem 1.4rem 1.5rem;
  margin: 0 -1.5rem 2rem -1.5rem;
  overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/pattern-flow.svg");
  background-size: cover;
  background-position: center;
  opacity: 0.22;
  pointer-events: none;
  z-index: 0;
  mask-image: linear-gradient(180deg, rgba(0,0,0,1), rgba(0,0,0,0.0) 95%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,1), rgba(0,0,0,0.0) 95%);
}
.page-header > * { position: relative; z-index: 1; }

.page-header .eyebrow {
  color: var(--brand-red-bright);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.page-header h1 { margin-bottom: 0.4rem; }
.page-header .lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 720px;
}

.content {
  max-width: 760px;
}

.content section {
  margin-bottom: 2rem;
}

/* Highlight panel */
.panel {
  position: relative;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-grad));
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand-teal-bright);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/pattern-mesh.svg");
  background-size: 60px 52px;
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
  mask-image: linear-gradient(135deg, rgba(0,0,0,0.9), rgba(0,0,0,0.0) 80%);
  -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,0.9), rgba(0,0,0,0.0) 80%);
}
.panel > * { position: relative; z-index: 1; }

.panel.accent { border-left-color: var(--accent); }
.panel.red { border-left-color: var(--brand-red-bright); }
.panel h3 { margin-top: 0; }
.panel p:last-child { margin-bottom: 0; }

/* Citation line inside a highlight panel */
.cite {
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--text-dim);
  margin-top: 0.7rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}
.cite em { color: var(--text-muted); }

/* CV / list blocks */
.cv-block {
  margin-bottom: 1.8rem;
}
.cv-block h3 {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin-bottom: 0.8rem;
  color: var(--brand-teal-bright);
}
.cv-entry {
  margin-bottom: 0.9rem;
}
.cv-entry .role {
  font-weight: 600;
  color: var(--text);
}
.cv-entry .meta {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}

/* Contact */
.contact-card {
  position: relative;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-grad));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  max-width: 520px;
  margin: 2rem auto;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.contact-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/pattern-mesh.svg");
  background-size: 60px 52px;
  opacity: 0.15;
  pointer-events: none;
  mask-image: radial-gradient(circle at 50% 0%, rgba(0,0,0,0.85), rgba(0,0,0,0.0) 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, rgba(0,0,0,0.85), rgba(0,0,0,0.0) 75%);
}
.contact-card > * { position: relative; z-index: 1; }
.contact-card .email {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--brand-teal-bright);
  margin: 1rem 0;
  word-break: break-all;
}
.contact-card .email:hover { color: var(--accent); }

/* Footer */
.site-footer {
  position: relative;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.6), rgba(8, 11, 16, 0.85));
  margin-top: auto;
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 179, 199, 0.4), rgba(232, 184, 109, 0.3), transparent);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.footer-inner a { color: var(--text-muted); }

/* Buttons / inline actions */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--brand-teal), #0d4f5d);
  color: #fff;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: 1px solid rgba(79, 179, 199, 0.5);
  transition: background 0.18s ease, transform 0.15s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  box-shadow: 0 2px 8px rgba(17, 102, 119, 0.25);
}
.btn:hover {
  background: linear-gradient(135deg, var(--brand-teal-bright), var(--brand-teal));
  color: #0d1117;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(79, 179, 199, 0.35);
  border-color: var(--brand-teal-bright);
}
.btn.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-light);
  box-shadow: none;
}
.btn.secondary:hover {
  background: var(--bg-card);
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(232, 184, 109, 0.2);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

/* Inline tags / chips */
.chip {
  display: inline-block;
  background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0.15rem 0.2rem 0.15rem 0;
}

/* Code example block */
pre {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-size: 0.9rem;
  margin: 1rem 0;
  line-height: 1.5;
}
pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-muted);
}

/* Mobile */
@media (max-width: 640px) {
  h1 { font-size: 1.8rem; }
  .hero h1 { font-size: 1.6rem; }
  .tagline { font-size: 1.2rem; }
  main { padding: 1.5rem 1rem 2rem; }
  .header-inner { padding: 0.7rem 1rem; }
  nav.primary { gap: 0; }
  nav.primary a { padding: 0.4rem 0.55rem; font-size: 0.85rem; }
  .logo-link { padding: 4px 9px; }
  .logo-link img { height: 24px; }
  .hero-logo-wrap { padding: 1rem 1.4rem; border-radius: 12px; }
  .page-header { margin-left: -1rem; margin-right: -1rem; padding-left: 1rem; padding-right: 1rem; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}