/* ============================================================
   ECTO-BAT — Layout
   ============================================================ */

/* ── CONTAINER ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-lg {
  width: 100%;
  max-width: var(--max-w-lg);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-sm {
  width: 100%;
  max-width: 800px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ── SECTION SPACING ────────────────────────────────────── */
.section {
  padding-block: var(--space-3xl);
}

.section-md {
  padding-block: var(--space-2xl);
}

.section-sm {
  padding-block: var(--space-xl);
}

/* ── GRID ───────────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Split layouts */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.split-60 {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-2xl);
  align-items: center;
}

.split-40 {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: var(--space-2xl);
  align-items: center;
}

/* ── FLEX HELPERS ───────────────────────────────────────── */
.flex          { display: flex; }
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-start    { display: flex; align-items: flex-start; }
.flex-col      { display: flex; flex-direction: column; }
.gap-sm        { gap: var(--space-sm); }
.gap-md        { gap: var(--space-md); }
.gap-lg        { gap: var(--space-lg); }

/* ── NAVIGATION ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(8,30,52,.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule-light);
  transition: background var(--t-mid) var(--ease);
}

.nav.scrolled {
  background: rgba(8,30,52,1);
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
}

.nav__inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
  text-decoration: none;
}

.nav__logo-img {
  height: 40px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav__logo-text span {
  color: var(--orange);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav__links a {
  font-size: var(--t-small);
  font-weight: 500;
  color: rgba(255,255,255,.75);
  letter-spacing: .03em;
  transition: color var(--t-fast) var(--ease);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-fast) var(--ease);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  transform: scaleX(1);
}

/* Dropdown */
.nav__dropdown {
  position: relative;
}
.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy-deep);
  border: 1px solid var(--rule-light);
  border-radius: var(--r-md);
  padding: .5rem 0;
  min-width: 240px;
  opacity: 0;
  pointer-events: none;
  transition: all var(--t-fast) var(--ease);
  box-shadow: var(--shadow-xl);
  z-index: 999;
}
.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown:focus-within .nav__dropdown-menu {
  opacity: 1;
  pointer-events: all;
  top: calc(100% + 8px);
}
.nav__dropdown-menu a {
  display: block;
  padding: .5rem 1.25rem;
  font-size: var(--t-xs);
  color: rgba(255,255,255,.65);
  letter-spacing: .02em;
  font-weight: 400;
  transition: all var(--t-fast);
  white-space: nowrap;
  border: none !important;
}
.nav__dropdown-menu a::after { display: none !important; }
.nav__dropdown-menu a:hover { color: var(--white); background: rgba(255,255,255,.05); }
.nav__dropdown-menu .dd-label {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255,255,255,.3);
  padding: .75rem 1.25rem .25rem;
  display: block;
}

.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: all var(--t-fast) var(--ease);
  border-radius: 2px;
}

.nav__mobile {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--navy-deep);
  border-bottom: 1px solid var(--rule-light);
  padding: var(--space-md) var(--gutter) var(--space-lg);
  z-index: 999;
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: transform var(--t-mid) var(--ease),
              opacity var(--t-mid) var(--ease),
              visibility 0s linear var(--t-mid);
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}

.nav__mobile.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: transform var(--t-mid) var(--ease),
              opacity var(--t-mid) var(--ease),
              visibility 0s linear 0s;
}

.nav__mobile a {
  display: block;
  padding: .75rem 0;
  color: rgba(255,255,255,.8);
  font-weight: 500;
  border-bottom: 1px solid var(--rule-light);
  transition: color var(--t-fast);
}

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

/* ── FOOTER ─────────────────────────────────────────────── */
.footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,.65);
  padding-block: var(--space-2xl) var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--rule-light);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.footer__disciplines {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.footer__tagline {
  font-size: var(--t-small);
  line-height: 1.6;
  color: rgba(255,255,255,.5);
}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: var(--space-md);
}

.footer__links { display: flex; flex-direction: column; gap: .625rem; }

.footer__links a {
  font-size: var(--t-small);
  color: rgba(255,255,255,.6);
  transition: color var(--t-fast);
}

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

.footer__contact-line {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: var(--t-small);
  color: rgba(255,255,255,.6);
  margin-bottom: .5rem;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
}

.footer__legal {
  font-size: var(--t-xs);
  color: rgba(255,255,255,.35);
}

.footer__legal a {
  color: rgba(255,255,255,.45);
  transition: color var(--t-fast);
}

.footer__legal a:hover { color: rgba(255,255,255,.75); }

/* ── PAGE HERO ──────────────────────────────────────────── */
.page-hero {
  padding-top: calc(var(--nav-h) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  background: var(--navy);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 80% 20%, rgba(215,122,47,.08) 0%, transparent 60%),
    radial-gradient(circle at 10% 80%, rgba(43,92,138,.15) 0%, transparent 50%);
  pointer-events: none;
}

/* Filigrane vertical sur les pages intérieures */
.page-hero::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: clamp(120px, 12vw, 200px);
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(215,122,47,.0) 5%,
    rgba(215,122,47,.6) 25%,
    rgba(215,122,47,.8) 55%,
    rgba(215,122,47,.5) 80%,
    rgba(215,122,47,.0) 95%,
    transparent 100%
  );
  pointer-events: none;
}

.page-hero__label {
  margin-bottom: var(--space-sm);
}

.page-hero__title {
  color: var(--white);
  font-size: var(--t-h1);
  margin-bottom: var(--space-md);
  max-width: 700px;
}

.page-hero__lead {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: rgba(255,255,255,.65);
  max-width: 580px;
  line-height: 1.75;
}

/* ── BREADCRUMB ─────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: var(--t-xs);
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: rgba(255,255,255,.4);
  margin-bottom: var(--space-md);
}

.breadcrumb a { color: rgba(255,255,255,.5); transition: color var(--t-fast); }
.breadcrumb a:hover { color: rgba(255,255,255,.8); }
.breadcrumb span { color: var(--orange); }

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

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .grid-2, .grid-3, .split, .split-60, .split-40 {
    grid-template-columns: 1fr;
  }
  .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .footer__bottom { flex-direction: column; text-align: center; }
  .section { padding-block: var(--space-2xl); }
  .section-md { padding-block: var(--space-xl); }
}