:root {
  --page-max: 1000px;
  --page-gutter: 1.1rem;
  --page-inline: max(var(--page-gutter), calc((100% - var(--page-max)) / 2));
}

/* Shared foundation — Olivier Maghe */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--page-inline);
  background: color-mix(in srgb, var(--nav-bg, #0b0d10) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: 1px solid color-mix(in srgb, currentColor 10%, transparent);
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  font-size: 1.05rem;
  z-index: 2;
}

.brand:hover {
  opacity: 0.85;
}

.nav-toggle {
  display: none;
  z-index: 2;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.4rem;
  border: 1px solid color-mix(in srgb, currentColor 25%, transparent);
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 0.28rem auto;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(0.34rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-0.34rem) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  opacity: 0.78;
  transition: opacity 0.2s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  opacity: 1;
}

.site-nav a[aria-current="page"] {
  font-weight: 600;
}

.lang-toggle {
  margin-left: 0.35rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid color-mix(in srgb, currentColor 28%, transparent);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  opacity: 0.9;
}

.lang-toggle:hover {
  opacity: 1;
}

.site-footer {
  padding: 2.5rem var(--page-inline) 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: flex-end;
  align-items: center;
  font-size: 0.88rem;
  opacity: 0.85;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
}

.socials a {
  text-decoration: none;
  opacity: 0.8;
}

.socials a:hover {
  opacity: 1;
  text-decoration: underline;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(1.1rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

[data-reveal="delay"] {
  transition-delay: 0.12s;
}

[data-reveal="delay-2"] {
  transition-delay: 0.24s;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 1.25rem;
    background: color-mix(in srgb, var(--nav-bg, #0b0d10) 96%, transparent);
    backdrop-filter: blur(12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    font-size: 1.35rem;
    opacity: 1;
  }

  .lang-toggle {
    margin-left: 0;
    margin-top: 0.5rem;
  }

  body.nav-open {
    overflow: hidden;
  }
}