/* ============================================================
   components.css — éléments réutilisables :
   .btn (primary, ghost, on-navy), .topnav, .site-foot,
   .card-base, primitives partagés.
   ============================================================ */

/* ============================================================
   BOUTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  padding: 0.95rem 2rem;
  border: 1px solid transparent;
  border-radius: 0;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--dur-mid) var(--ease-premium),
    box-shadow var(--dur-mid) var(--ease-premium),
    border-color var(--dur-mid) var(--ease-premium),
    color var(--dur-mid) var(--ease-premium),
    background var(--dur-mid) var(--ease-premium);
  white-space: nowrap;
}
.btn > * { position: relative; z-index: 1; }
.btn .icon { width: 14px; height: 14px; flex-shrink: 0; transition: transform var(--dur-mid) var(--ease-premium); }
.btn:hover .icon { transform: translateX(3px); }

/* Primary — fond or, texte navy. Slide-in or pâle au hover. */
.btn.primary {
  background: var(--accent);
  color: var(--bg-tertiary);
  border-color: var(--accent);
}
.btn.primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-light);
  transform: translateX(-101%);
  transition: transform 0.35s var(--ease-premium);
  z-index: 0;
}
.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(201, 168, 76, 0.32);
}
.btn.primary:hover::before { transform: translateX(0); }

/* Ghost — transparent, bordure or, texte navy */
.btn.ghost {
  background: transparent;
  border-color: var(--border-mid);
  color: var(--text-primary);
}
.btn.ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* Variante sur fond navy (section contact, hero éventuel) */
.on-navy .btn.ghost,
.btn.ghost.on-navy {
  border-color: rgba(201, 168, 76, 0.3);
  color: var(--text-on-navy-mid);
}
.on-navy .btn.ghost:hover,
.btn.ghost.on-navy:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(201, 168, 76, 0.08);
}

/* ============================================================
   TOPNAV — sticky, navy avec accent or
   ============================================================ */

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.95rem 3rem;
  background: var(--bg-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-on-navy);
  transition:
    box-shadow var(--dur-mid) var(--ease-premium),
    border-color var(--dur-mid) var(--ease-premium);
}
.topnav.scrolled {
  box-shadow: var(--shadow-nav);
  border-bottom-color: rgba(201, 168, 76, 0.22);
}

.topnav-brand {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  white-space: nowrap;
}
.topnav-brand em { font-style: italic; }

.topnav-links {
  display: flex;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.topnav-links a {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-on-navy-dim);
  padding: 0.5rem 0.9rem;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.topnav-links a:hover { color: var(--accent); background: rgba(201, 168, 76, 0.1); }

/* Bouton hamburger mobile */
.topnav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(201, 168, 76, 0.25);
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  cursor: pointer;
}
.topnav-toggle span {
  width: 16px;
  height: 1px;
  background: var(--accent);
  transition: transform var(--dur-fast) var(--ease-premium), opacity var(--dur-fast);
}
.topnav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(2.5px) rotate(45deg); }
.topnav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.topnav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-2.5px) rotate(-45deg); }

/* ============================================================
   FOOTER
   ============================================================ */

.site-foot {
  padding: 2.5rem 3rem;
  background: #0a1520;
  color: rgba(200, 212, 224, 0.7);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border-top: 1px solid rgba(201, 168, 76, 0.12);
}
.foot-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}
.foot-brand {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--text-on-navy);
}
.foot-brand em { color: var(--accent); font-style: italic; }
.foot-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}
.foot-links a {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(138, 155, 176, 0.85);
  transition: color var(--dur-fast);
}
.foot-links a:hover { color: var(--accent); }
.foot-fine {
  border-top: 1px solid rgba(201, 168, 76, 0.08);
  padding-top: 1.25rem;
  font-size: 0.72rem;
  color: rgba(138, 155, 176, 0.55);
  letter-spacing: 0.06em;
}

/* ============================================================
   CARD-BASE — surface partagée entre sections
   ============================================================ */

.card-base {
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  position: relative;
  transition: background var(--dur-mid) var(--ease-premium);
}
.card-base:hover { background: var(--bg-card-hover); }

/* ============================================================
   ICONS svg inline
   ============================================================ */

.icon { display: inline-block; vertical-align: middle; stroke-width: 1.4; }

/* ============================================================
   RESPONSIVE — topnav et footer
   ============================================================ */

@media (max-width: 1024px) {
  .topnav { padding: 0.85rem 2rem; }
  .site-foot { padding: 2.5rem 2rem; }
}

@media (max-width: 880px) {
  .topnav {
    padding: 0.85rem 1.25rem;
    flex-wrap: wrap;
  }
  .topnav-toggle {
    display: inline-flex;
    order: 2;
  }
  .topnav-brand { order: 1; }
  .topnav-links {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--dur-mid) var(--ease-premium);
  }
  .topnav.menu-open .topnav-links {
    max-height: 360px;
    padding-top: 0.75rem;
  }
  .topnav-links a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(201, 168, 76, 0.08);
  }
  .site-foot { padding: 2.25rem 1.25rem; }
  .foot-row { flex-direction: column; align-items: flex-start; }
}