/* ============================================================
   OPTIMUSCLE — Bottom Navigation Bar
   ============================================================
   5 tabs : Accueil, Training, Nutrition, Défis, Profil
   Glassmorphism background, orange active indicator
   Visible uniquement sur data-view="dashboard"
============================================================ */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: none;
  justify-content: space-around;
  align-items: center;
  padding: 6px 8px;
  padding-bottom: calc(6px + env(safe-area-inset-bottom, 0px));
  height: var(--bottom-nav-height);
  background: rgba(13, 13, 15, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.3);
}

/* Visible uniquement en dashboard (pas en workout) */
body[data-view="dashboard"][data-subpage="home"] .bottom-nav,
body[data-view="dashboard"][data-subpage="history"] .bottom-nav,
body[data-view="dashboard"][data-subpage="badges"] .bottom-nav,
body[data-view="dashboard"][data-subpage="profile"] .bottom-nav,
body[data-view="dashboard"][data-subpage="nutrition-view"] .bottom-nav,
body[data-view="dashboard"][data-subpage="challenges-view"] .bottom-nav {
  display: flex;
}

/* ===== TAB ITEM ===== */
.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 4px;
  border: none;
  background: none;
  color: var(--text-dimmer);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
  min-width: 56px;
  -webkit-tap-highlight-color: transparent;
}

.bottom-nav-item svg {
  width: 24px;
  height: 24px;
  stroke-width: 1.8;
  transition: all var(--duration-base) var(--ease-spring);
}

.bottom-nav-item:active {
  transform: scale(0.92);
}

/* ===== ACTIVE TAB ===== */
.bottom-nav-item.active {
  color: var(--accent);
}

.bottom-nav-item.active svg {
  stroke-width: 2.2;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

/* Active indicator dot */
.bottom-nav-item.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--accent);
  animation: indicatorPop 300ms var(--ease-spring);
}

@keyframes indicatorPop {
  0% {
    width: 0;
    opacity: 0;
  }
  50% {
    width: 28px;
  }
  100% {
    width: 20px;
    opacity: 1;
  }
}

/* ===== CONTENT SPACING ===== */
body[data-view="dashboard"] .page.active {
  padding-bottom: calc(var(--bottom-nav-height) + 16px);
}

/* ===== HIDE OLD TABS WHEN BOTTOM NAV IS SHOWN ===== */
body[data-view="dashboard"] nav.tabs {
  display: none !important;
}

/* ===== RESPONSIVE ===== */
@media (min-width: 600px) {
  .bottom-nav {
    left: 50%;
    transform: translateX(-50%);
    max-width: 480px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
  }
}

@media (min-width: 1024px) {
  .bottom-nav {
    max-width: 520px;
  }
}