/* === Tokens (afgeleid uit keystone.ai) === */
:root {
  --surface: #ffffff;
  --surface-soft: #e2dfe5;
  --surface-dark: #00063c;
  --surface-accent-soft: #e5eafa;

  --text: #000000;
  --text-subtle: #606064;
  --text-weak: #8e8e91;
  --text-on-dark: #ffffff;

  --accent: #0409ea;
  --accent-hover: #00063c;

  --container-max: 1100px;
  --gutter: 24px;
  --section-vpad: 96px;
  --section-vpad-mobile: 56px;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; overflow-x: hidden; }
body { margin: 0; overflow-x: hidden; }
img, picture, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, dl { margin: 0; padding: 0; }
ul { list-style: none; }

/* === Base typografie === */
body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  background: var(--surface);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(36px, 5.2vw, 52px);
  line-height: 1.08;
  font-weight: 500;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 400;
  letter-spacing: -0.015em;
  margin-bottom: .75em;
}

h3 {
  font-size: 22px;
  line-height: 1.3;
  font-weight: 500;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.lead { font-size: 20px; color: var(--text); }
.muted { color: var(--text-subtle); }
.eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin: 0 0 16px;
}

a { color: var(--accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* === Layout === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* === Nav === */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  z-index: 100;
}
.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}
.nav__brand img, .nav__brand picture {
  display: block;
  height: 40px;
  width: auto;
}
.nav__brand:hover { opacity: .82; }

@media (max-width: 480px) {
  .nav__brand img { height: 32px; }
}
.nav__links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
}
.nav__links a {
  color: var(--text);
  font-weight: 400;
}
.nav__links a:hover { color: var(--accent); }
.nav__lang {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-subtle);
  font-weight: 500;
  letter-spacing: .04em;
}
.nav__lang [aria-current="true"] { color: var(--text); }
.nav__lang a { color: var(--text-subtle); }
.nav__lang a:hover { color: var(--accent); }

@media (max-width: 480px) {
  .nav__lang { gap: 8px; font-size: 12px; }
}

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__lang { margin-left: auto; }
}

/* === Hero === */
.hero {
  position: relative;
  isolation: isolate;
  color: var(--text-on-dark);
  padding: clamp(140px, 18vw, 220px) 0 clamp(120px, 14vw, 180px);
  overflow: hidden;
  background: var(--surface-dark);
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  display: block;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.65) 100%);
}
.hero .container { position: relative; }
.hero__title {
  max-width: 14ch;
  color: var(--text-on-dark);
}
.hero__lede {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.5;
  color: rgba(255,255,255,0.88);
  max-width: 60ch;
  margin-top: 24px;
}
.hero__slogan {
  font-size: 17px;
  color: rgba(255,255,255,0.72);
  margin-top: 32px;
}
.hero__slogan em {
  font-style: italic;
  letter-spacing: -0.01em;
}
.hero .btn { margin-top: 24px; }
.hero .btn--primary:hover {
  background: var(--text-on-dark);
  color: var(--surface-dark);
}

/* === Sections === */
.section {
  padding: var(--section-vpad) 0;
}
@media (max-width: 720px) {
  .section { padding: var(--section-vpad-mobile) 0; }
}

.section--soft {
  background: var(--surface-soft);
}
.section--dark {
  background: var(--surface-dark);
  color: var(--text-on-dark);
}
.section--dark .muted { color: rgba(255,255,255,0.7); }
.section--dark a { color: var(--text-on-dark); border-bottom: 1px solid rgba(255,255,255,0.4); }
.section--dark a:hover { color: var(--text-on-dark); border-bottom-color: var(--text-on-dark); }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: background-color .15s ease, color .15s ease, transform .15s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: var(--text-on-dark);
}
.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--text-on-dark);
  transform: translateY(-1px);
}
.btn::after {
  content: "→";
  font-size: 18px;
  line-height: 1;
}

/* === Lists === */
.check-list {
  margin: 16px 0 24px;
  display: grid;
  gap: 10px;
}
.check-list li {
  position: relative;
  padding-left: 28px;
  line-height: 1.5;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 14px;
  height: 1.5px;
  background: var(--accent);
}
.section--dark .check-list li::before { background: var(--text-on-dark); }

/* === Phases === */
.phases {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 56px;
}
@media (max-width: 720px) {
  .phases { grid-template-columns: 1fr; gap: 32px; }
}
.phase__num {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.phase h3 { margin-bottom: 8px; }
.phase p { color: var(--text-subtle); }

/* === Team === */
.team {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  margin: 56px 0 40px;
}
@media (max-width: 720px) {
  .team { grid-template-columns: 1fr; gap: 48px; }
}
.person picture { display: block; width: 160px; height: 160px; margin-bottom: 20px; }
.person img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.02);
  transition: filter .25s ease;
}
.person:hover img { filter: grayscale(0%); }
.person h3 { margin-bottom: 4px; }
.person__role {
  color: var(--text-subtle);
  font-size: 14px;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.linkedin {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-subtle);
}
.linkedin:hover { color: var(--accent); }
.linkedin svg { width: 18px; height: 18px; }

/* === Principles === */
.principles {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 56px;
}
@media (max-width: 720px) {
  .principles { grid-template-columns: 1fr; gap: 28px; }
}
.principles dt {
  font-weight: 500;
  font-size: 20px;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.principles dd {
  margin: 0;
  color: var(--text-subtle);
  line-height: 1.55;
}

/* === Contact line === */
.contact-line {
  margin-top: 32px;
  color: var(--text-subtle);
  font-size: 15px;
}
.contact-line a { color: var(--text); border-bottom: 1px solid rgba(0,0,0,0.15); }
.contact-line a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* === Footer === */
.footer {
  background: var(--surface);
  border-top: 1px solid rgba(0,0,0,0.06);
  padding: 32px 0;
  font-size: 14px;
  color: var(--text-subtle);
}
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.footer a { color: var(--text-subtle); }
.footer a:hover { color: var(--accent); }

/* === Reduced motion === */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}