/* ONEIRO — nav chapitres (Index · Studies · Manifesto · Contact) */
html {
  overflow-x: clip;
}

.oneiro-nav {
  position: fixed;
  top: 22px;
  left: var(--oneiro-nav-pad, var(--pad, var(--margin, clamp(28px, 5vw, 80px))));
  right: var(--oneiro-nav-pad, var(--pad, var(--margin, clamp(28px, 5vw, 80px))));
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  pointer-events: none;
  font-family: var(--font-mono, "IBM Plex Mono", ui-monospace, monospace);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.oneiro-nav a {
  pointer-events: auto;
  text-decoration: none;
  color: #eef6f2;
  mix-blend-mode: difference;
  opacity: 0.94;
  transition: opacity 0.22s ease, color 0.22s ease;
}

.oneiro-nav a:hover {
  opacity: 1;
}

.oneiro-nav.is-light a {
  mix-blend-mode: normal;
  color: var(--tea, #74806d);
  opacity: 0.88;
}

.oneiro-nav.is-light a:hover {
  color: var(--vermilion, #b73a1f);
  opacity: 1;
}

.oneiro-nav--home {
  z-index: 1000;
  transition: opacity 0.38s ease, visibility 0.38s ease;
}

.oneiro-nav--home.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.oneiro-nav--home.is-hidden a,
.oneiro-nav--home.is-hidden .oneiro-nav__toggle {
  pointer-events: none;
}

.oneiro-nav--home .oneiro-nav__vol {
  font-weight: 400;
  letter-spacing: 0.28em;
}

.oneiro-nav--home a,
.oneiro-nav--home.is-light a {
  mix-blend-mode: normal !important;
  color: #181614 !important;
  opacity: 1 !important;
}

.oneiro-nav--home a:hover,
.oneiro-nav--home.is-light a:hover {
  color: var(--vermilion, #b73a1f) !important;
  opacity: 1 !important;
}

.oneiro-nav__menu {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.8vw, 28px);
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* ——— Hamburger (mobile) ——— */
.oneiro-nav__toggle {
  display: none;
  pointer-events: auto;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin: -8px -10px -8px auto;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: #eef6f2;
  mix-blend-mode: difference;
  flex-shrink: 0;
}

.oneiro-nav__toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 22px;
}

.oneiro-nav__toggle-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.24s ease, opacity 0.24s ease;
  transform-origin: center;
}

.oneiro-nav.is-open .oneiro-nav__toggle-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.oneiro-nav.is-open .oneiro-nav__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.oneiro-nav.is-open .oneiro-nav__toggle-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.oneiro-nav--home .oneiro-nav__toggle,
.oneiro-nav.is-light .oneiro-nav__toggle {
  mix-blend-mode: normal;
  color: #181614;
}

.oneiro-nav.is-light .oneiro-nav__toggle {
  color: var(--tea, #74806d);
}

.oneiro-nav__backdrop {
  display: none;
}

.oneiro-nav__drawer-panel {
  pointer-events: auto;
}

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

/* ——— Desktop : menu horizontal dans le header ——— */
@media (min-width: 641px) {
  .oneiro-nav__toggle {
    display: none !important;
  }

  .oneiro-nav__drawer {
    position: static;
    transform: none !important;
    visibility: visible !important;
    width: auto;
    height: auto;
    overflow: visible;
    pointer-events: auto;
  }

  .oneiro-nav__drawer-panel {
    background: none;
    box-shadow: none;
    padding: 0;
    height: auto;
  }

  .oneiro-nav__menu {
    flex-direction: row;
    align-items: center;
    gap: clamp(14px, 2.8vw, 28px);
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .oneiro-nav__menu a {
    display: inline;
    width: auto;
    padding: 0;
    border-bottom: none;
    font-size: inherit;
    letter-spacing: inherit;
    line-height: inherit;
  }
}

@media (max-width: 640px) {
  .oneiro-nav {
    top: 16px;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .oneiro-nav__toggle {
    display: flex;
  }

  .oneiro-nav__drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(88vw, 320px);
    z-index: 1200;
    transform: translate3d(100%, 0, 0);
    visibility: hidden;
    transition: transform 0.34s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.34s ease;
    pointer-events: none;
  }

  .oneiro-nav.is-open .oneiro-nav__drawer {
    transform: translate3d(0, 0, 0);
    visibility: visible;
    pointer-events: auto;
  }

  .oneiro-nav__drawer-panel {
    height: 100%;
    background: #f4f6f1;
    padding: clamp(72px, 18vw, 96px) clamp(24px, 6vw, 32px) 40px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .oneiro-nav.is-open .oneiro-nav__drawer-panel {
    box-shadow: -10px 0 40px rgba(24, 22, 20, 0.14);
  }

  .oneiro-nav__menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    flex-wrap: nowrap;
    justify-content: flex-start;
  }

  .oneiro-nav__menu a {
    display: block;
    width: 100%;
    padding: 18px 0;
    font-size: 13px;
    letter-spacing: 0.22em;
    line-height: 1.35;
    border-bottom: 1px solid rgba(24, 22, 20, 0.1);
    mix-blend-mode: normal !important;
    color: #181614 !important;
    opacity: 1 !important;
  }

  .oneiro-nav__menu a:hover {
    color: var(--vermilion, #b73a1f) !important;
    opacity: 1 !important;
  }

  .oneiro-nav__menu a:last-child {
    border-bottom: none;
  }

  .oneiro-nav__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1190;
    background: rgba(24, 22, 20, 0.48);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.34s ease, visibility 0.34s ease;
  }

  .oneiro-nav.is-open .oneiro-nav__backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .oneiro-nav.is-open .oneiro-nav__toggle {
    mix-blend-mode: normal;
    color: #181614;
    z-index: 1210;
    position: relative;
  }
}