:root {
  --navy: #0b1626;
  --navy-2: #0f1b2d;
  --charcoal: #16233a;
  --surface: #ffffff;
  --bg: #f6f8fa;
  --text: #141c2b;
  --muted: #566076;
  --accent: #2f6df6;
  --accent-dark: #1f4fc4;
  --accent-light: #5b8bff;
  --cyan: #3ad0d6;
  --border: #e2e8f0;
  --border-dark: #223049;
  --radius: 12px;
  --maxw: 1080px;
  --maxw-narrow: 720px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container.narrow { max-width: var(--maxw-narrow); }

h1, h2, h3 { line-height: 1.18; margin: 0 0 0.5rem; letter-spacing: -0.02em; }

p { margin: 0 0 1rem; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover, a:focus-visible { color: var(--accent-dark); }

:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; border-radius: 4px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1.1rem;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 109, 246, 0.3);
}
.btn-primary:hover, .btn-primary:focus-visible {
  color: #fff;
  background: var(--accent-dark);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: #e8eefb;
  border-color: rgba(255, 255, 255, 0.3);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.55);
}

/* Header */
.site-header {
  background: rgba(11, 22, 38, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
}
.brand:hover, .brand:focus-visible { color: #fff; }
.brand-name { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-mark { display: block; }

.site-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.8rem;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: #c3cde0;
  font-size: 0.93rem;
  font-weight: 500;
}
.site-nav a:hover, .site-nav a:focus-visible { color: #fff; }
.site-nav .nav-cta {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.45rem 1rem;
  border-radius: 999px;
}
.site-nav .nav-cta:hover, .site-nav .nav-cta:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 10px;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: #fff;
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(58, 208, 214, 0.1), transparent 60%),
    radial-gradient(900px 480px at 10% 0%, rgba(47, 109, 246, 0.18), transparent 55%),
    linear-gradient(165deg, var(--navy), var(--charcoal));
  color: #fff;
  padding: 6.5rem 0 6rem;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 75%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 800px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.3rem);
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}
.hero-tagline {
  font-size: 1.2rem;
  color: #c7d1e2;
  max-width: 660px;
  margin: 0 0 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* Section scaffolding */
.section { padding: 5rem 0; }
.section-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.section h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.section-lead {
  color: var(--muted);
  max-width: 640px;
  font-size: 1.1rem;
  margin-bottom: 2.25rem;
}

/* Card grids */
.card-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}
.card-grid.two { grid-template-columns: repeat(2, 1fr); }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
}
.feature-card h3 {
  font-size: 1.12rem;
  font-weight: 650;
  margin-bottom: 0.4rem;
}
.feature-card p { color: var(--muted); margin: 0; font-size: 0.98rem; }

/* Approach */
.approach { background: var(--bg); }

/* Apps */
.apps {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.product-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.9rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #cfd9ea;
}
.product-card-soon { background: transparent; border-style: dashed; }
.product-card-soon:hover { transform: none; box-shadow: none; }
.product-name { font-size: 1.3rem; font-weight: 700; }
.product-desc { color: var(--muted); margin: 0.25rem 0 1.5rem; flex: 1; }
.product-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--accent);
}
.product-link .arrow { transition: transform 0.15s ease; }
.product-link:hover .arrow, .product-link:focus-visible .arrow { transform: translateX(3px); }

/* Experience */
.experience { background: var(--bg); }
.prose { max-width: var(--maxw-narrow); margin-top: 1.5rem; }
.split-text p { color: var(--muted); font-size: 1.05rem; }
.split-text p:last-child { margin-bottom: 0; }

/* About page */
.site-nav a[aria-current="page"] { color: #fff; }
.page-hero {
  background:
    radial-gradient(900px 400px at 10% 0%, rgba(47, 109, 246, 0.18), transparent 55%),
    linear-gradient(165deg, var(--navy), var(--charcoal));
  color: #fff;
  padding: 4.5rem 0 4rem;
}
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.page-lead { font-size: 1.15rem; color: #c7d1e2; max-width: 660px; margin: 0; }
.app-logo { display: block; width: 48px; height: 48px; margin-bottom: 1rem; border-radius: 10px; }
.brand-logo { display: block; width: 40px; height: 40px; margin-bottom: 1rem; }
.credentials {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.consulting { background: var(--bg); }
.consulting p { color: var(--muted); font-size: 1.1rem; }

/* Ideas / contact */
.ideas { background: var(--navy-2); color: #fff; text-align: center; }
.ideas .section-eyebrow { color: var(--cyan); }
.ideas h2 { color: #fff; }
.ideas p { color: #c7d1e2; font-size: 1.1rem; margin-bottom: 2rem; }

/* Footer */
.site-footer {
  background: var(--navy);
  color: #8a97ad;
  padding: 2.5rem 0;
  font-size: 0.9rem;
  border-top: 1px solid var(--border-dark);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-brand { color: #e6ecf6; font-weight: 600; margin: 0; }
.footer-links { list-style: none; display: flex; gap: 0.6rem; margin: 0; padding: 0; }
.footer-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-dark);
  border-radius: 10px;
  color: #aab6c9;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.footer-icon:hover, .footer-icon:focus-visible {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.06);
}
.icon {
  display: block;
  width: 20px;
  height: 20px;
  background-color: currentColor;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
}
.icon-credly { --icon: url("../img/credly.svg"); }
.icon-linkedin { --icon: url("../img/linkedin.svg"); }
.site-footer p { margin: 0; }

/* Responsive */
@media (max-width: 900px) {
  .card-grid.three { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--navy);
    border-bottom: 1px solid var(--border-dark);
    padding: 0.75rem 1.5rem 1.25rem;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0.25rem; }
  .site-nav a { display: block; padding: 0.65rem 0; }
  .site-nav .nav-cta { text-align: center; margin-top: 0.5rem; }
  .hero { padding: 4.5rem 0 4rem; }
  .page-hero { padding: 3.5rem 0 3rem; }
  .section { padding: 3.5rem 0; }
  .card-grid.two { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}