:root {
  --bg-0: #000000;
  --bg-1: #050810;
  --bg-2: #0a1224;
  --accent: #2db4e8;
  --accent-dim: rgba(45, 180, 232, 0.16);
  --ink: #ffffff;
  --ink-dim: rgba(255, 255, 255, 0.72);
  --ink-faint: rgba(255, 255, 255, 0.45);
  --ink-faintest: rgba(255, 255, 255, 0.28);
  --rule: rgba(255, 255, 255, 0.12);
  --card-bg: rgba(255, 255, 255, 0.03);
  --header-h: 76px;
}

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

html { scroll-behavior: smooth; }
html, body { height: 100%; }

body {
  min-height: 100vh;
  background-color: var(--bg-0);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(45, 180, 232, 0.10), transparent 60%),
    radial-gradient(ellipse 100% 60% at 50% 100%, rgba(20, 60, 110, 0.14), transparent 70%),
    radial-gradient(circle at 50% 0%, var(--bg-2) 0%, var(--bg-1) 40%, var(--bg-0) 80%);
  background-attachment: fixed;
  color: var(--ink-dim);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

/* ---------- Starfield background (site-wide, subtle) ---------- */

.stars {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.stars::before,
.stars::after,
.stars span {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background-repeat: repeat;
}

.stars::before {
  background-image:
    radial-gradient(1px 1px at 23px 41px, rgba(255,255,255,0.55), transparent 50%),
    radial-gradient(1px 1px at 87px 12px, rgba(255,255,255,0.45), transparent 50%),
    radial-gradient(1px 1px at 142px 88px, rgba(255,255,255,0.6), transparent 50%),
    radial-gradient(1px 1px at 200px 30px, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 260px 110px, rgba(255,255,255,0.55), transparent 50%),
    radial-gradient(1px 1px at 320px 60px, rgba(255,255,255,0.35), transparent 50%),
    radial-gradient(1px 1px at 50px 150px, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 110px 200px, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 180px 240px, rgba(255,255,255,0.55), transparent 50%),
    radial-gradient(1px 1px at 240px 180px, rgba(255,255,255,0.45), transparent 50%),
    radial-gradient(1px 1px at 300px 220px, rgba(255,255,255,0.5), transparent 50%);
  background-size: 360px 260px;
  animation: drift-slow 240s linear infinite;
  opacity: 0.9;
}

.stars::after {
  background-image:
    radial-gradient(1.4px 1.4px at 60px 70px, rgba(255,255,255,0.95), transparent 60%),
    radial-gradient(1.4px 1.4px at 220px 140px, rgba(255,255,255,0.9), transparent 60%),
    radial-gradient(1.4px 1.4px at 380px 50px, rgba(255,255,255,0.85), transparent 60%),
    radial-gradient(1.4px 1.4px at 480px 220px, rgba(255,255,255,0.95), transparent 60%),
    radial-gradient(1.6px 1.6px at 140px 300px, rgba(180, 220, 255, 0.9), transparent 60%),
    radial-gradient(1.4px 1.4px at 330px 380px, rgba(255,255,255,0.85), transparent 60%),
    radial-gradient(1.6px 1.6px at 560px 340px, rgba(200, 230, 255, 0.95), transparent 60%);
  background-size: 620px 460px;
  animation: drift-mid 180s linear infinite;
  opacity: 0.85;
}

.stars span {
  background-image:
    radial-gradient(2px 2px at 120px 80px, rgba(255,255,255,1), transparent 60%),
    radial-gradient(2.2px 2.2px at 420px 260px, rgba(45, 180, 232, 0.9), transparent 60%),
    radial-gradient(2px 2px at 700px 120px, rgba(255,255,255,1), transparent 60%),
    radial-gradient(2.4px 2.4px at 240px 480px, rgba(45, 180, 232, 0.8), transparent 60%),
    radial-gradient(2px 2px at 820px 460px, rgba(255,255,255,1), transparent 60%);
  background-size: 900px 600px;
  animation: drift-fast 120s linear infinite, twinkle 4.6s ease-in-out infinite;
  opacity: 0.9;
}

@keyframes drift-slow {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-180px, -130px, 0); }
}
@keyframes drift-mid {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-310px, -230px, 0); }
}
@keyframes drift-fast {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-450px, -300px, 0); }
}
@keyframes twinkle {
  0%, 100% { opacity: 0.9; }
  50%      { opacity: 0.45; }
}

section {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 40px);
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(3, 6, 14, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--rule);
}

main {
  padding-top: var(--header-h);
}

.site-header-inner {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 40px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand img {
  height: 40px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 36px);
  margin-left: auto;
}

.main-nav a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--ink);
}

.main-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.nav-cta {
  margin-left: 20px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 0 auto;
  background: var(--ink);
  transition: transform 200ms ease, opacity 200ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #04070d;
    border-bottom: 1px solid var(--rule);
    max-height: 0;
    overflow: hidden;
    transition: max-height 260ms ease;
    margin-left: 0;
  }

  .main-nav.open {
    max-height: 420px;
  }

  .main-nav a {
    padding: 16px clamp(20px, 5vw, 40px);
    border-bottom: 1px solid var(--rule);
    width: 100%;
  }

  .main-nav a[aria-current="page"] {
    border-bottom: 1px solid var(--rule);
    background: var(--accent-dim);
  }

  .site-header-inner .nav-cta {
    display: none;
  }

  .nav-toggle { display: flex; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 200ms ease, background 200ms ease, border-color 200ms ease, color 200ms ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #001420;
  box-shadow: 0 8px 30px rgba(45, 180, 232, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 34px rgba(45, 180, 232, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Hero ---------- */

.hero {
  padding: clamp(64px, 12vh, 120px) 0 clamp(48px, 8vh, 80px);
  text-align: center;
}

.hero-rotterdam {
  position: relative;
}

.hero-rotterdam::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100vw;
  height: 100%;
  transform: translateX(-50%);
  z-index: -1;
  background-image:
    linear-gradient(rgba(5, 8, 16, 0.72), rgba(5, 8, 16, 0.72)),
    url('rotterdam-hero.jpg');
  background-size: cover, cover;
  background-position: center, center 35%;
  background-repeat: no-repeat;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
}

.eyebrow::before,
.eyebrow::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}

h1 {
  font-size: clamp(32px, 5.4vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 900px;
  margin: 0 auto 22px;
}

.hero .lede {
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--ink-dim);
  max-width: 700px;
  margin: 0 auto 36px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Section headings ---------- */

.section {
  padding: clamp(56px, 9vh, 96px) 0;
  border-top: 1px solid var(--rule);
}

.section-head {
  max-width: 720px;
  margin: 0 0 clamp(32px, 6vh, 52px);
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

.section-head p {
  font-size: 15px;
  color: var(--ink-dim);
}

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

@media (min-width: 861px) and (max-width: 1020px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 26px 24px;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(45, 180, 232, 0.35);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card p {
  font-size: 14px;
  color: var(--ink-dim);
}

.card ul {
  margin-top: 14px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card > ul:first-child {
  margin-top: 0;
}

.card ul li {
  font-size: 13.5px;
  color: var(--ink-faint);
  padding-left: 16px;
  position: relative;
}

.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.card .btn { margin-top: 18px; }

/* ---------- Tag pills ---------- */

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--ink-dim);
  border: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 999px;
  padding: 8px 16px;
}

.pill.accent {
  border-color: rgba(45, 180, 232, 0.4);
  color: var(--accent);
  background: var(--accent-dim);
}

.flag-icon {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  flex-shrink: 0;
  display: block;
}

.accent-label {
  color: var(--accent);
}

#why .card,
#services .card {
  text-align: center;
}

.values-line {
  margin-top: 28px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- Plain content paragraphs ---------- */

p { font-size: 15px; }
p + p { margin-top: 12px; }

.lead-line {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 10px;
}

/* ---------- CTA banner ---------- */

.cta-banner {
  border-radius: 20px;
  border: 1px solid rgba(45, 180, 232, 0.3);
  background: linear-gradient(135deg, rgba(45, 180, 232, 0.12), rgba(45, 180, 232, 0.02));
  padding: clamp(32px, 6vw, 52px);
  text-align: center;
}

.cta-banner h2 { margin-bottom: 10px; }
.cta-banner p { max-width: 560px; margin: 0 auto 26px; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  padding: clamp(48px, 8vh, 72px) 0 28px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

@media (max-width: 760px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

.footer-brand img { height: 32px; margin-bottom: 14px; opacity: 0.78; }
.footer-brand p { font-size: 13px; color: var(--ink-faint); max-width: 260px; }

.footer-col h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  font-size: 13.5px;
  color: var(--ink-dim);
  margin-bottom: 10px;
  transition: color 200ms ease;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--accent);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faintest);
}

/* ---------- Light section variant (alternates with the dark theme) ---------- */

.section-light {
  --ink: #0a1224;
  --ink-dim: rgba(10, 18, 36, 0.72);
  --ink-faint: rgba(10, 18, 36, 0.48);
  --ink-faintest: rgba(10, 18, 36, 0.32);
  --rule: rgba(10, 18, 36, 0.12);
  --card-bg: #ffffff;
  color: var(--ink-dim);
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(45, 180, 232, 0.14), transparent 60%),
    #eef3f9;
}

.section-light .eyebrow,
.section-light .accent-label {
  color: #0e7fae;
}

.section-light .card {
  box-shadow: 0 4px 24px rgba(10, 18, 36, 0.06);
}

.section-light .card:hover {
  box-shadow: 0 10px 32px rgba(10, 18, 36, 0.1);
  border-color: rgba(45, 180, 232, 0.4);
}

.section-light .pill {
  background: rgba(10, 18, 36, 0.03);
}

.section-light .btn-secondary:hover,
.section-light .btn-secondary:focus-visible {
  color: #0e7fae;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stars::before,
  .stars::after,
  .stars span {
    animation: none !important;
  }
}