/* ═══════════════════════════════════════════════════════════════
   Bart & Zonen — one-man software development shop
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #0d1017;
  --bg-elev: #161a24;
  --surface: #1c2230;
  --card: #212938;
  --outline: #333c4e;
  --text: #ecefff;
  --text-dim: #959cb0;
  --text-faint: #5a6274;
  --primary: #7aa2f7;
  --primary-dim: #567bc8;
  --accent: #ff7eb6;
  --max-width: 1000px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 150ms; }
a:hover { color: var(--text); }

/* ─── Navigation ──────────────────────────────────────── */
.nav {
  background: rgba(13, 16, 23, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(51, 60, 78, 0.5);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
}
.nav-brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.3px;
  color: var(--text);
  text-decoration: none;
}
.nav-brand .amp { color: var(--primary); margin: 0 2px; }
.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
}
.nav-links a { color: var(--text-dim); }
.nav-links a:hover { color: var(--text); }

/* ─── Hero ────────────────────────────────────────────── */
.hero {
  padding: 96px 24px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 6px 14px;
  background: rgba(122, 162, 247, 0.1);
  border: 1px solid rgba(122, 162, 247, 0.25);
  border-radius: 20px;
}
h1 {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.05;
  margin-bottom: 24px;
  color: var(--text);
}
h1 .highlight {
  color: var(--primary);
}
.hero-lead {
  font-size: 22px;
  line-height: 1.55;
  color: var(--text-dim);
  max-width: 620px;
  margin-bottom: 40px;
}
.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ─── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  background: var(--primary);
  color: #0d1017;
  font-weight: 600;
  font-size: 15px;
  border-radius: 28px;
  transition: all 180ms;
  text-decoration: none;
  border: none;
  cursor: pointer;
}
.btn:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(122, 162, 247, 0.3);
}
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--outline);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(122, 162, 247, 0.08);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: none;
}

/* ─── Section ─────────────────────────────────────────── */
section {
  padding: 80px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-header {
  margin-bottom: 48px;
}
.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
h2 {
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.6px;
  line-height: 1.15;
  color: var(--text);
  max-width: 700px;
}

/* ─── About ───────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text p {
  font-size: 18px;
  color: var(--text-dim);
  margin-bottom: 20px;
  line-height: 1.7;
}
.about-text p strong { color: var(--text); font-weight: 600; }
.about-card {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 16px;
  padding: 28px;
}
.about-card-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.about-card-value {
  font-size: 18px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 20px;
}
.about-card-value:last-child { margin-bottom: 0; }

/* ─── Stack ──────────────────────────────────────────── */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.stack-item {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 16px;
  padding: 28px;
  transition: all 200ms;
}
.stack-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.stack-icon {
  font-size: 32px;
  margin-bottom: 16px;
  display: block;
}
.stack-item h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.stack-item p {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ─── Contact ─────────────────────────────────────────── */
.contact-section {
  background: linear-gradient(180deg, transparent, rgba(122, 162, 247, 0.04));
  border-top: 1px solid var(--outline);
  padding: 96px 24px;
  max-width: none;
  margin-top: 40px;
}
.contact-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.contact-card {
  background: var(--card);
  border: 1px solid var(--outline);
  border-radius: 16px;
  padding: 24px;
  transition: border-color 150ms;
}
.contact-card:hover { border-color: var(--primary); }
.contact-card-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.contact-card-value {
  font-size: 18px;
  color: var(--text);
  font-weight: 600;
}
.contact-card-value a { color: var(--text); }
.contact-card-value a:hover { color: var(--primary); }

/* ─── Footer ──────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--outline);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
}
footer a { color: inherit; }

/* ─── Mobile ──────────────────────────────────────────── */
@media (max-width: 720px) {
  .hero { padding: 64px 20px 56px; }
  h1 { font-size: 42px; letter-spacing: -0.8px; }
  h2 { font-size: 28px; }
  .hero-lead { font-size: 18px; }
  section { padding: 56px 20px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { gap: 16px; font-size: 14px; }
  .contact-section { padding: 64px 20px; }
}