/* ============================================
   navbar.css — Bottom Nav + Theme Toggle
   ============================================ */

/* ─── Top-right Theme Button ─── */
.theme-btn {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 999;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.theme-btn:hover {
  color: var(--accent-cyan);
  border-color: rgba(56, 189, 248, 0.4);
  transform: rotate(12deg);
}

.theme-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: all 0.3s ease;
}

/* ─── Bottom Floating Nav ─── */
.bottom-nav {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.2rem;
  background: rgba(13, 20, 36, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(56, 189, 248, 0.14);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

/* ─── Nav Items ─── */
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.25s ease;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.8;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.25s ease;
}

.nav-item:hover {
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.08);
}

.nav-item:hover svg { transform: scale(1.15); }

.nav-item.active {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
  animation: pulse 2s infinite;
}

/* ─── Tooltip ─── */
.nav-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
}

.nav-item:hover .nav-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Light Mode Overrides ─── */
body.light {
  --bg-primary:    #f0f6ff;
  --bg-secondary:  #e8f0fa;
  --bg-card:       #ffffff;
  --bg-card-hover: #f5f8ff;
  --text-primary:  #0a0f1e;
  --text-secondary:#334155;
  --text-muted:    #64748b;
  --border:        rgba(56, 130, 248, 0.18);
  --border-hover:  rgba(56, 130, 248, 0.4);
}

body.light .bottom-nav {
  background: rgba(240, 246, 255, 0.88);
  border-color: rgba(56, 130, 248, 0.18);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

body.light body::before {
  background:
    radial-gradient(ellipse 60% 50% at 10% 10%, rgba(56,189,248,0.05) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(168,85,247,0.05) 0%, transparent 60%);
}

/* ─── Responsive ─── */
@media (max-width: 480px) {
  .bottom-nav {
    bottom: 14px;
    padding: 0.45rem 0.65rem;
  }

  .nav-item { width: 40px; height: 40px; }
  .nav-item svg { width: 16px; height: 16px; }

  .theme-btn { top: 14px; right: 14px; width: 40px; height: 40px; }
}