/**
 * ============================================================
 *  layout.css — STRUCTURE : HEADER / FOOTER / GRILLES
 * ============================================================
 */

/* ============ HEADER ============ */
#site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--t-med), box-shadow var(--t-med), height var(--t-med);
}

#site-header.is-scrolled {
  background: rgba(11, 34, 48, 0.92);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  height: 68px;
}

/* home page starts on a dark hero -> header text light by default */
#site-header .header-inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.2rem;
  color: var(--text-light);
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}

.brand__baseline {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 500;
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
}

.main-nav a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light-60);
  padding-block: 6px;
  transition: color var(--t-fast);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--t-med);
}

.main-nav a:hover,
.main-nav a.is-active { color: var(--text-light); }
.main-nav a:hover::after,
.main-nav a.is-active::after { transform: scaleX(1); transform-origin: left; }

.header-cta {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  border: 1px solid rgba(246, 242, 233, 0.25);
  border-radius: var(--r-pill);
  padding: 3px;
}
.lang-switch button {
  padding: 6px 13px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--text-light-60);
  transition: background var(--t-fast), color var(--t-fast);
}
.lang-switch button.is-active {
  background: var(--amber);
  color: var(--ink);
}
.lang-switch button:not(.is-active):hover { color: var(--text-light); }

@media (max-width: 880px) {
  .lang-switch { order: -1; }
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
}

.nav-toggle .bars {
  position: relative;
  width: 22px; height: 16px;
}
.nav-toggle .bars span {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--t-fast), opacity var(--t-fast), top var(--t-fast);
}
.nav-toggle .bars span:nth-child(1) { top: 0; }
.nav-toggle .bars span:nth-child(2) { top: 7px; }
.nav-toggle .bars span:nth-child(3) { top: 14px; }

body.nav-open .nav-toggle .bars span:nth-child(1) { top: 7px; transform: rotate(45deg); }
body.nav-open .nav-toggle .bars span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle .bars span:nth-child(3) { top: 7px; transform: rotate(-45deg); }

@media (max-width: 880px) {
  .main-nav {
    position: fixed;
    inset: 0;
    top: 0;
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    background: var(--ink);
    transform: translateY(-100%);
    opacity: 0;
    transition: transform var(--t-med), opacity var(--t-med);
    pointer-events: none;
  }
  body.nav-open .main-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav a { font-size: 1.4rem; }
  .header-cta .btn { display: none; }
  .nav-toggle { display: flex; z-index: 210; }
  body.nav-open .nav-toggle { position: fixed; right: var(--gutter); top: 22px; }
}

/* ============ FOOTER ============ */
#site-footer {
  background: var(--ink);
  color: var(--text-light);
  padding-block: clamp(56px, 8vw, 90px) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(246, 242, 233, 0.12);
}

@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; row-gap: 36px; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 18px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a, .footer-col p {
  color: var(--text-light-60);
  font-size: 0.94rem;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--text-light); }

.footer-brand p { margin-top: 14px; max-width: 320px; color: var(--text-light-60); font-size: 0.92rem; }

.footer-socials { display: flex; gap: 12px; margin-top: 20px; }
.footer-socials a {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(246, 242, 233, 0.2);
  border-radius: var(--r-pill);
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.footer-socials a:hover {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
  transform: translateY(-3px);
}
.footer-socials svg { width: 16px; height: 16px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-light-60);
}

/* ============ GRILLES UTILITAIRES ============ */
.grid {
  display: grid;
  gap: 28px;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
}