/* N van Esch Consultancy — design tokens from logo (navy → cyan) */

:root {
  --navy: #0a2a5c;
  --navy-deep: #061c3d;
  --cyan: #00b7ce;
  --cyan-bright: #1ad0e4;
  --ink: #0a2a5c;
  --muted: #555555;
  --surface: #f3f5f7;
  --surface-elevated: #fafbfc;
  --line: rgba(10, 42, 92, 0.12);
  --gradient: linear-gradient(135deg, var(--navy) 0%, var(--cyan) 100%);
  --gradient-soft: linear-gradient(
    145deg,
    rgba(10, 42, 92, 0.08) 0%,
    rgba(0, 183, 206, 0.12) 55%,
    rgba(243, 245, 247, 0.9) 100%
  );
  --shadow-soft: 0 18px 40px rgba(6, 28, 61, 0.08);
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --header-h: 4.25rem;
  --radius: 2px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--navy);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--cyan);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.shell {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.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: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(250, 251, 252, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 100%;
}

.brand img {
  object-fit: contain;
  object-position: left center;
  background: transparent;
}

.brand--nav img {
  height: 2.5rem;
  width: auto;
}

.brand--footer img {
  height: 2.75rem;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav__list {
  display: flex;
  gap: 1.5rem;
}

.site-nav__list a {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--navy);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 100%;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after {
  transform: scaleX(1);
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.lang-btn {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.65rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.lang-btn.is-active {
  background: var(--gradient);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-elevated);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin-inline: auto;
  background: var(--navy);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-of-type {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* Hero */

.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: grid;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero__atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 85% 15%, rgba(0, 183, 206, 0.18), transparent 55%),
    radial-gradient(ellipse 70% 50% at 10% 80%, rgba(10, 42, 92, 0.1), transparent 50%),
    var(--gradient-soft);
}

.hero__atmosphere::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 42, 92, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 42, 92, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 40%, #000 20%, transparent 75%);
}

.hero__atmosphere::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  top: 28%;
  right: 18%;
  box-shadow:
    -120px 80px 0 -3px var(--navy),
    60px 140px 0 -4px var(--cyan),
    -40px 200px 0 -5px rgba(10, 42, 92, 0.45);
  opacity: 0.55;
}

.hero__inner {
  padding-block: clamp(3rem, 8vw, 6rem) clamp(4rem, 10vw, 7rem);
  max-width: 720px;
  margin-left: max(calc((100% - 1120px) / 2 + 1.25rem), 1.25rem);
  margin-right: auto;
}

.hero__logo {
  width: min(100%, 420px);
  margin-bottom: 1.75rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise-in 0.9s var(--ease) 0.1s forwards;
}

.hero__title {
  font-size: clamp(1.85rem, 3.6vw, 2.65rem);
  max-width: 18ch;
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise-in 0.9s var(--ease) 0.25s forwards;
}

.hero__lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 36ch;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise-in 0.9s var(--ease) 0.4s forwards;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise-in 0.9s var(--ease) 0.55s forwards;
}

@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease),
    color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 183, 206, 0.25);
}

.btn--primary:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(0, 183, 206, 0.32);
}

.btn--ghost {
  background: transparent;
  color: var(--navy);
  border-color: rgba(10, 42, 92, 0.28);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--navy-deep);
}

/* Sections */

.section {
  padding-block: clamp(4rem, 9vw, 6.5rem);
}

.section__header {
  max-width: 36rem;
  margin-bottom: 2.75rem;
}

.section__header h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 0.75rem;
}

.section__header p {
  color: var(--muted);
  font-size: 1.1rem;
}

.section--services {
  background: var(--surface-elevated);
  border-block: 1px solid var(--line);
}

.services {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem 3rem;
}

.service {
  display: grid;
  gap: 0.75rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--line);
}

.service__icon {
  width: 3rem;
  height: 3rem;
  margin-bottom: 0.25rem;
}

.service__icon svg {
  width: 100%;
  height: 100%;
}

.stroke-grad {
  stroke: var(--navy);
  transition: stroke 0.25s var(--ease);
}

.fill-grad {
  fill: var(--cyan);
  transition: fill 0.25s var(--ease);
}

.service h3 {
  font-size: 1.2rem;
}

.service p {
  color: var(--muted);
  max-width: 34ch;
}

.section--about {
  background:
    linear-gradient(180deg, rgba(0, 183, 206, 0.05), transparent 40%),
    var(--surface);
}

.about__body {
  max-width: 42rem;
  font-size: 1.125rem;
  color: var(--muted);
}

.section--contact {
  background: var(--surface-elevated);
  border-top: 1px solid var(--line);
}

.contact__details {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  margin-bottom: 2rem;
}

.contact__link {
  display: grid;
  gap: 0.25rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
}

.contact__label {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact__link:hover {
  color: var(--cyan);
}

.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Footer */

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  background: #eef1f4;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer__copy {
  font-size: 0.92rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* Reveal */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Gradient strokes via currentColor trick on icons */
.service__icon svg {
  color: var(--navy);
}

.service:hover .stroke-grad {
  stroke: var(--cyan);
}

.service:hover .fill-grad {
  fill: var(--navy);
}

/* Responsive */

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1.25rem 1.25rem 1.5rem;
    background: rgba(250, 251, 252, 0.97);
    border-bottom: 1px solid var(--line);
    transform: translateY(-0.5rem);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
  }

  .site-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0.85rem;
  }

  .lang-switch {
    align-self: flex-start;
  }

  .services {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero__inner {
    margin-left: auto;
    margin-right: auto;
    width: min(1120px, calc(100% - 2.5rem));
  }

  .hero__logo {
    width: min(100%, 320px);
  }

  .brand--nav img {
    height: 2.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero__logo,
  .hero__title,
  .hero__lead,
  .hero__actions,
  .reveal {
    animation: none;
    opacity: 1;
    transform: none;
    transition: none;
  }
}