/* ===================================================================
   Clément HAOND — Portfolio · layout.css
   Header, navigation (desktop + mobile) et footer — communs à toutes
   les pages du site.
   =================================================================== */

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

.header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  background: var(--color-paper);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-out);
}
.header.is-scrolled {
  border-bottom-color: var(--color-line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.logo {
  display: inline-flex;
}
.logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-ink);
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.logo:hover .logo__mark { background: var(--color-ink); color: var(--color-paper); }

.nav__list {
  display: flex;
  gap: var(--space-4);
}
.nav__list a {
  font-size: 0.9375rem;
  font-weight: 500;
  position: relative;
  padding-block: 0.25rem;
}
.nav__list a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--color-ink);
  transition: right var(--duration-base) var(--ease-out);
}
.nav__list a:hover::after { right: 0; }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-2);
}

/* -------------------------------------------------------- */
/* Bouton "Labo" — accès à la version alternative /secret/   */
/* Stylisé pour donner un avant-goût de ce qui attend.       */
/* -------------------------------------------------------- */
.btn--lab {
  position: relative;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn--lab:hover,
.btn--lab:focus-visible,
.btn--lab:active {
  color: var(--color-paper);
  border-color: transparent;
  animation: lab-glitch 640ms steps(1, end) infinite;
}
@keyframes lab-glitch {
  0%, 100% { background: var(--color-ink); }
  15%      { background: #ff2e9a; }
  35%      { background: #00f0ff; }
  55%      { background: #8b3bff; }
  75%      { background: #39ff7a; }
  90%      { background: #fbff2e; color: var(--color-ink); }
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin-inline: auto;
  background: var(--color-ink);
  transition: transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast) var(--ease-out);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-paper);
  border-top: 1px solid var(--color-line);
}
.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.mobile-nav a { font-family: var(--font-display); font-size: 1.375rem; font-weight: 500; }
.mobile-nav.is-open { display: flex; }

@media (max-width: 860px) {
  .nav, .nav__actions { display: none; }
  .nav__toggle { display: flex; }
}

.mobile-nav__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}


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

.footer {
  border-top: 1px solid var(--color-line);
  padding-block: var(--space-4);
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-muted);
}
.footer__top {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 500;
  color: var(--color-ink);
  position: relative;
  padding-bottom: 0.2rem;
}
.footer__top::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--color-ink);
  transition: right var(--duration-base) var(--ease-out);
}
.footer__top:hover::after { right: 0; }