/* =====================================================================
   VELYON — COMPOSANTS : nav, boutons, cartes, chips
   ===================================================================== */

/* ---------- Boutons ---------- */
.btn {
  --btn-bg: transparent;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: var(--r-pill);
  font-size: 14px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  position: relative; isolation: isolate;
  transition: transform var(--t-fast), box-shadow var(--t-med), background var(--t-med), color var(--t-med), border-color var(--t-med);
  will-change: transform;
}
.btn:active { transform: translateY(1px) scale(.99); }

.btn-or {
  background: var(--grad-or); color: #1a1300;
  box-shadow: 0 8px 24px rgba(212,175,55,.25);
}
.btn-or:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(212,175,55,.42); }

.btn-ghost {
  background: rgba(255,255,255,.02);
  color: var(--blanc);
  border: 1px solid var(--bord-fort);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--or);
  background: rgba(212,175,55,.08);
  box-shadow: var(--glow-or);
}

.btn-sm { padding: 11px 20px; font-size: 12.5px; }
.btn svg { width: 17px; height: 17px; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: height var(--t-med), background var(--t-med), backdrop-filter var(--t-med), border-color var(--t-med);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  height: var(--nav-h-scroll);
  background: rgba(9,9,9,.72);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom-color: var(--bord-neutre);
  box-shadow: var(--ombre-nav);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; max-width: var(--max-large); }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand .emblem { height: 34px; width: auto; transition: height var(--t-med); }
.nav.scrolled .brand .emblem { height: 28px; }
.brand-word {
  font-family: var(--font-titre); font-weight: 600;
  font-size: 1.55rem; letter-spacing: .22em; padding-left: 4px;
  background: var(--grad-or-texte);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--or);
}

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  font-size: 13px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase;
  color: var(--gris-clair); position: relative; padding: 6px 0;
  transition: color var(--t-fast);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--grad-or); transition: width var(--t-med);
}
.nav-links a:hover { color: var(--blanc); }
.nav-links a:hover::after { width: 100%; }

.nav-cta { display: flex; align-items: center; gap: 14px; }

/* Burger */
.burger {
  display: none; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--bord-neutre);
  align-items: center; justify-content: center; flex-direction: column; gap: 5px;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.burger span { width: 20px; height: 2px; background: var(--blanc); border-radius: 2px; transition: transform var(--t-med), opacity var(--t-fast); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menu mobile plein écran */
.mobile-menu {
  position: fixed; inset: 0; z-index: 99;
  background: rgba(9,9,9,.97);
  backdrop-filter: blur(10px);
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 8px; padding: 100px 24px 40px;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity var(--t-med), transform var(--t-med), visibility var(--t-med);
}
.mobile-menu.open { opacity: 1; visibility: visible; transform: none; }
.mobile-menu a {
  font-family: var(--font-titre); font-size: 2rem; color: var(--blanc);
  padding: 12px 0; letter-spacing: .02em;
}
.mobile-menu a:active { color: var(--or); }
.mobile-menu .btn { margin-top: 24px; }

/* ---------- Cartes ---------- */
.card {
  background: linear-gradient(180deg, var(--noir-3), var(--noir-2));
  border: 1px solid var(--bord);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3vw, 32px);
  box-shadow: var(--ombre-carte);
  transition: transform var(--t-med), box-shadow var(--t-med), border-color var(--t-med), background var(--t-med);
  position: relative; overflow: hidden;
}
.card:hover, .card:focus-within {
  transform: translateY(-6px);
  border-color: var(--bord-fort);
  box-shadow: var(--ombre-carte-h), var(--glow-or);
  background: linear-gradient(180deg, var(--noir-4), var(--noir-3));
}
.card h3 { color: var(--blanc); font-size: 1.5rem; }

/* Chips (boutons rapides / choix) */
.chip {
  padding: 11px 18px; border-radius: var(--r-pill);
  border: 1px solid var(--bord-neutre); background: rgba(255,255,255,.02);
  color: var(--gris-clair); font-size: 14px; font-weight: 500;
  transition: all var(--t-fast);
}
.chip:hover { border-color: var(--bord-fort); color: var(--blanc); }
.chip[aria-pressed="true"], .chip.active {
  background: rgba(212,175,55,.12); border-color: var(--or); color: var(--or-clair);
  box-shadow: var(--glow-or);
}

/* Mention estimation */
.mention {
  font-size: 13px; color: var(--gris-fonce); line-height: 1.5;
  border-left: 2px solid var(--bord-fort); padding-left: 14px; max-width: 60ch;
}

/* ---------- Responsive navigation ---------- */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .burger { display: inline-flex; }
  .nav-cta .btn-or { display: none; } /* le CTA reste dans le menu mobile */
}
@media (max-width: 400px) {
  .brand-word { font-size: 1.3rem; letter-spacing: .18em; }
}