/* ============================================================
   LAYOUT — Nav, Footer, Grilles
   Envie Couture
   ============================================================ */

/* ---- Navigation ------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 4rem;
  color: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: background .35s, color .35s, border-color .35s, padding .35s;
}

.nav.is-scrolled {
  background: rgba(249, 249, 249, .96);
  color: var(--color-text);
  border-color: var(--color-border);
  padding-block: 1.1rem;
}


.nav__logo {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: inherit;
  position: relative;
  z-index: 250;
}

.nav__logo img {
  height: 44px;
  width: auto;
}

.nav__logo--dark  { display: none; }
.nav__logo--light { display: block; }

.nav.is-scrolled .nav__logo--light { display: none; }
.nav.is-scrolled .nav__logo--dark  { display: block; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 3rem;
  list-style: none;
}

.nav__link {
  font-family: var(--font-title);
  font-size: .78rem;
  font-weight: 500;
  font-style: normal;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: inherit;
  position: relative;
}

.nav__link::after,
.nav__cta::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width .35s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav__link:hover::after,
.nav__link.is-active::after,
.nav__cta:hover::after { width: 100%; }

.nav__cta {
  font-family: var(--font-title);
  font-size: .78rem;
  font-weight: 600;
  font-style: normal;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: inherit;
  position: relative;
}

.nav.is-scrolled .nav__cta { color: inherit; }

/* Hamburger (mobile) */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 26px;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  position: relative;
  z-index: 250;
}

.nav__burger span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menu mobile — plein écran (burger ouvert) */
@media (max-width: 900px) {
  .nav.is-open .nav__links {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    position: fixed;
    inset: 0;
    background: var(--color-text);
    color: var(--color-white);
    z-index: 150;
  }

  .nav.is-open .nav__link {
    font-size: 1.6rem;
    letter-spacing: .1em;
  }
}

/* ---- Footer ----------------------------------------------- */
.footer {
  background: var(--color-text);
  color: var(--color-bg);
  padding-block: 4rem 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer__brand {
  font-family: var(--font-title);
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer__tagline {
  color: rgba(249,249,249,.6);
  font-size: var(--fs-sm);
  max-width: 28ch;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: rgba(249,249,249,.5);
  margin-bottom: 1.25rem;
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.footer__list a {
  font-size: var(--fs-sm);
  color: rgba(249,249,249,.75);
  transition: color var(--transition);
}

.footer__list a:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  font-size: var(--fs-sm);
  color: rgba(249,249,249,.4);
}

/* ---- Grilles de page -------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap);
}

/* ---- Responsive ------------------------------------------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .nav { padding: 1.25rem 1.75rem; }
  .nav__links { display: none; }
  .nav__burger { display: flex; }

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

  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: .5rem; text-align: center; }

  .section { padding-block: 3.5rem; }
}

@media (max-width: 480px) {
  .section { padding-block: 2.5rem; }
  .grid-auto { grid-template-columns: 1fr; }
}