*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --cobalt: #1a3a7c;
  --cobalt-deep: #0d2154;
  --cobalt-mid: #2a4fa0;
  --cobalt-light: #d6e0f5;
  --cobalt-pale: #eef2fb;
  --warm: #f7f4ef;
  --gold: #b5843a;
  --ink: #0d1a38;
  --muted: rgba(13,26,56,0.65);
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Jost', 'Helvetica Neue', sans-serif;
}
html { scroll-behavior: smooth; }
body {
  background: var(--cobalt-pale);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 3rem;
  background: rgba(238,242,251,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26,58,124,0.08);
}
.logo-wrap { display: flex; flex-direction: row; align-items: center; gap: 0.75rem; text-decoration: none; }
.logo-main {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt-deep);
}
.logo-aer {
  font-size: 0.48rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  color: var(--cobalt);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 300;
  opacity: 0.6;
  transition: opacity 0.3s;
}
.nav-links a:hover { opacity: 1; }

/* PAGE HEADER */
.page-header {
  padding: 10rem 3rem 5rem;
  border-bottom: 1px solid rgba(26,58,124,0.1);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: end;
}
.page-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.page-title {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 300;
  line-height: 1.1;
  color: var(--cobalt-deep);
}
.page-title em { font-style: italic; color: var(--cobalt-mid); }
.header-right p {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 300;
  line-height: 1.6;
  color: var(--cobalt-deep);
  margin-bottom: 1rem;
}
.header-right .sub {
  font-size: 0.88rem;
  font-family: var(--sans);
  line-height: 1.8;
  color: var(--muted);
}

/* SECTION */
.section-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 3rem;
}
.section-rule { flex: 1; height: 1px; background: rgba(26,58,124,0.12); }

/* BOEKEN */
.boeken {
  padding: 6rem 3rem;
  background: #fff;
}
.boeken-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.boek {
  padding: 2rem 1.75rem;
  border: 1px solid rgba(26,58,124,0.1);
  background: var(--cobalt-pale);
  transition: border-color 0.3s, box-shadow 0.3s;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.boek:hover {
  border-color: rgba(26,58,124,0.3);
  box-shadow: 0 4px 16px rgba(26,58,124,0.07);
}
.boek-titel {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--cobalt-deep);
  line-height: 1.3;
}
.boek-auteur {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.boek-link {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: auto;
  padding-top: 0.75rem;
}

/* EXPERTS */
.experts {
  padding: 6rem 3rem;
  background: var(--cobalt-pale);
  border-top: 1px solid rgba(26,58,124,0.08);
}
.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.expert {
  padding: 1.5rem;
  background: #fff;
  border: 1px solid rgba(26,58,124,0.08);
  text-decoration: none;
  transition: border-color 0.3s;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.expert:hover { border-color: rgba(26,58,124,0.25); }
.expert-naam {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--cobalt-deep);
}
.expert-link {
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  opacity: 0.7;
}

/* PODCASTS */
.podcasts {
  padding: 6rem 3rem;
  background: #fff;
  border-top: 1px solid rgba(26,58,124,0.08);
}
.podcast-lijst {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.podcast-item {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(26,58,124,0.06);
  align-items: baseline;
  text-decoration: none;
  transition: background 0.2s;
}
.podcast-item:first-child { border-top: 1px solid rgba(26,58,124,0.06); }
.podcast-item:hover { background: rgba(26,58,124,0.02); }
.podcast-titel {
  font-size: 0.88rem;
  color: var(--cobalt-deep);
  line-height: 1.4;
}
.podcast-show {
  font-size: 0.78rem;
  color: var(--muted);
}
.podcast-gast {
  font-size: 0.78rem;
  color: var(--gold);
  opacity: 0.8;
}

/* YOUTUBE */
.youtube {
  padding: 6rem 3rem;
  background: var(--cobalt-pale);
  border-top: 1px solid rgba(26,58,124,0.08);
}
.youtube-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.youtube-item {
  padding: 1.5rem;
  background: #fff;
  border: 1px solid rgba(26,58,124,0.08);
  text-decoration: none;
  transition: border-color 0.3s;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.youtube-item:hover { border-color: rgba(26,58,124,0.25); }
.youtube-icon {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--cobalt);
  opacity: 0.2;
  flex-shrink: 0;
}
.youtube-naam {
  font-size: 0.88rem;
  color: var(--cobalt-deep);
  line-height: 1.3;
}

/* ARTIKELEN */
.artikelen {
  padding: 6rem 3rem;
  background: #fff;
  border-top: 1px solid rgba(26,58,124,0.08);
}
.artikel-lijst { display: flex; flex-direction: column; }
.artikel-item {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 2rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(26,58,124,0.06);
  align-items: baseline;
  text-decoration: none;
  transition: background 0.2s;
}
.artikel-item:first-child { border-top: 1px solid rgba(26,58,124,0.06); }
.artikel-item:hover { background: rgba(26,58,124,0.02); }
.artikel-titel {
  font-size: 0.88rem;
  color: var(--cobalt-deep);
  line-height: 1.4;
}
.artikel-auteur {
  font-size: 0.78rem;
  color: var(--muted);
}

/* TEDX */
.tedx {
  padding: 6rem 3rem;
  background: var(--cobalt-deep);
  border-top: 1px solid rgba(26,58,124,0.08);
}
.tedx .section-eyebrow { color: var(--gold); }
.tedx .section-rule { background: rgba(247,244,239,0.1); }
.tedx-item {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(247,244,239,0.08);
  text-decoration: none;
  transition: background 0.3s, border-color 0.3s;
}
.tedx-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(181,132,58,0.3);
}
.tedx-titel {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--warm);
}
.tedx-arrow { color: var(--gold); opacity: 0.6; }

/* CONTACT */
.contact-strip {
  margin: 3rem;
  background: var(--cobalt);
  padding: 4rem 5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
}
.contact-strip h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem,3vw,2.2rem);
  font-weight: 300;
  color: var(--warm);
  margin-bottom: 0.5rem;
}
.contact-strip p { font-size: 0.82rem; color: rgba(247,244,239,0.5); }
.cta-btn {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt-deep);
  background: var(--warm);
  padding: 1rem 2.5rem;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.3s;
  flex-shrink: 0;
}
.cta-btn:hover { background: var(--cobalt-light); }

/* FOOTER */
footer {
  padding: 2.5rem 3rem;
  border-top: 1px solid rgba(26,58,124,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
footer p { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(13,26,56,0.3); }
.footer-links { display: flex; gap: 2rem; }
footer a { color: rgba(13,26,56,0.35); text-decoration: none; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; transition: color 0.3s; }
footer a:hover { color: var(--cobalt); }

@media (max-width: 768px) {
  nav { padding: 1.25rem 1.5rem; }
  .nav-links { display: none; }
  .page-header { grid-template-columns: 1fr; padding: 7rem 1.5rem 3rem; gap: 2rem; }
  .boeken-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr 1fr; }
  .youtube-grid { grid-template-columns: 1fr; }
  .podcast-item { grid-template-columns: 1fr; gap: 0.25rem; }
  .artikel-item { grid-template-columns: 1fr; gap: 0.25rem; }
  .boeken, .experts, .podcasts, .youtube, .artikelen, .tedx { padding: 4rem 1.5rem; }
  .contact-strip { margin: 0 1.5rem 4rem; padding: 3rem 2rem; flex-direction: column; align-items: flex-start; gap: 2rem; }
  footer { flex-direction: column; align-items: flex-start; gap: 1.5rem; padding: 2rem 1.5rem; }
}